:root {
  color-scheme: dark;
  --bg: #000000;
  --panel: #0a0a0a;
  --panel-strong: #141414;
  --line: #303030;
  --text: #f4f4f4;
  --muted: #a7a7a7;
  --primary-rgb: 255, 255, 255;
  --primary: rgb(var(--primary-rgb));
  --primary-soft: rgba(var(--primary-rgb), 0.16);
  --yellow: #f8c14a;
  --red: #f15d5d;
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(var(--primary-rgb), 0.12), transparent 32rem),
    linear-gradient(180deg, #171717 0%, var(--bg) 34rem);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input,
textarea {
  font: inherit;
}

.app-shell {
  width: min(1920px, calc(100% - 24px));
  margin: 0 auto;
  padding: 18px 0 40px;
  overflow-x: hidden;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 18px;
  min-height: 72px;
  margin-bottom: 12px;
}

.back-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  padding: 10px 14px;
  cursor: pointer;
}

.back-button:hover {
  background: rgba(255, 255, 255, 0.1);
}

.title-block {
  min-width: 0;
  flex: 1;
}

.title-block h1,
.title-block h2,
.title-block h3 {
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}

.topbar-action {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  cursor: pointer;
  font-weight: 700;
  padding: 10px 14px;
}

.topbar-action:hover:not(:disabled) {
  background: var(--primary-soft);
  border-color: rgba(var(--primary-rgb), 0.45);
}

.topbar-action:disabled {
  cursor: wait;
  opacity: 0.62;
}

.profile-menu {
  position: relative;
  display: flex;
  align-items: center;
  margin-left: auto;
  flex-shrink: 0;
}

.google-profile-button {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 999px;
  padding: 3px;
  cursor: pointer;
  background: conic-gradient(#4285f4, #34a853, #fbbc05, #ea4335, #4285f4);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.18), 0 2px 10px rgba(0, 0, 0, 0.35);
}

.google-profile-button:hover,
.google-profile-button[aria-expanded="true"] {
  box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.08), 0 2px 12px rgba(0, 0, 0, 0.45);
}

.profile-initial,
.profile-avatar-large span {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  border-radius: 999px;
  background: #202124;
  color: #e8eaed;
  font-weight: 800;
  font-size: 1rem;
}

.google-profile-panel {
  position: absolute;
  top: calc(100% + 12px);
  right: 0;
  z-index: 90;
  width: min(360px, calc(100vw - 24px));
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 28px;
  background: #1f2023;
  color: var(--text);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.58);
  padding: 16px;
  max-height: calc(100dvh - 80px);
  overflow-y: auto;
  overscroll-behavior: contain;
}

.google-profile-panel::-webkit-scrollbar {
  width: 6px;
}
.google-profile-panel::-webkit-scrollbar-track {
  background: transparent;
}
.google-profile-panel::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
  border-radius: 10px;
}
.google-profile-panel::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.3);
}

.profile-panel-head {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 2px 2px 14px;
  border-bottom: 1px solid var(--line);
}

.profile-avatar-large {
  width: 58px;
  height: 58px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 999px;
  padding: 4px;
  background: conic-gradient(#4285f4, #34a853, #fbbc05, #ea4335, #4285f4);
}

.profile-avatar-large span {
  font-size: 1.35rem;
}

.profile-title {
  margin: 0;
  font-weight: 800;
  font-size: 1rem;
}

.profile-subtitle {
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 0.86rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 245px;
}

.profile-settings {
  display: grid;
  gap: 10px;
  padding-top: 12px;
}

.profile-setting-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(128px, auto);
  align-items: center;
  gap: 12px;
  border-radius: 18px;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.045);
}

.settings-tabs {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-start;
  width: 100%;
}

.settings-tab {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  padding: 8px 14px;
  font-weight: 700;
  cursor: pointer;
  min-width: 112px;
}

.settings-tab:hover {
  border-color: var(--primary);
  background: var(--primary-soft);
}

.settings-tab.is-active {
  border-color: var(--primary);
  background: var(--primary-soft);
  color: var(--primary);
}

.settings-content {
  display: grid;
  gap: 14px;
  margin-top: 12px;
}

.settings-heading {
  align-items: flex-start;
  flex-direction: column;
}

.settings-loading {
  margin: 0;
  color: var(--muted);
}

.settings-summary {
  display: grid;
  gap: 12px;
}

.settings-summary-card {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.035);
  padding: 14px;
}

.settings-summary-label {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.openai-key-card .openai-key-status { margin: 0 0 10px; font-size: 0.85rem; }
.openai-key-status.openai-key-missing { color: #f2b8b5; }
.openai-key-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}
.openai-key-input {
  flex: 1 1 260px;
  min-width: 180px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
  color: inherit;
  padding: 9px 12px;
  font: inherit;
}
.settings-btn {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.06);
  color: inherit;
  padding: 9px 16px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.settings-btn:hover { background: rgba(255, 255, 255, 0.12); }
.settings-btn-danger { color: #f2b8b5; border-color: rgba(242, 184, 181, 0.4); }
.openai-key-feedback { margin: 8px 0 0; font-size: 0.82rem; min-height: 1em; }

.settings-pill-list,
.settings-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.settings-pill {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  padding: 6px 10px;
  font-size: 0.8rem;
}

.settings-pill-empty {
  color: var(--muted);
}

#settingsView .engine-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  width: 100%;
  max-width: 720px;
  gap: 14px;
}

.engine-card {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.035);
  padding: 16px;
}

.engine-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.engine-card-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1rem;
}

.engine-card-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.engine-badge-chip {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--muted);
  padding: 4px 10px;
  font-size: 0.72rem;
}

.engine-props {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 14px;
}

.engine-props tr:not(:last-child) {
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.engine-props th,
.engine-props td {
  padding: 8px 0;
  text-align: left;
  vertical-align: top;
}

.engine-props th {
  width: 140px;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.engine-props td {
  font-size: 0.9rem;
  word-break: break-word;
}

.engine-detail-block {
  display: grid;
  gap: 8px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.engine-detail-label {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.engine-usage-text {
  margin: 0;
  padding: 8px 12px;
  background: rgba(0, 0, 0, 0.25);
  border-radius: 8px;
  font-family: var(--font-mono, monospace);
  font-size: 0.8rem;
  line-height: 1.4;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 250px;
  overflow-y: auto;
  border: 1px solid rgba(255, 255, 255, 0.05);
}


.accounts-grid {
  display: grid;
  gap: 10px;
}

.accounts-grid .profile-setting-row {
  grid-template-columns: minmax(0, 1fr) minmax(150px, auto);
}

.settings-content .profile-setting-row {
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.04);
}

.settings-content .profile-setting-help {
  color: var(--muted);
}

.profile-setting-label,
.profile-setting-help {
  display: block;
}

.profile-setting-label {
  font-weight: 750;
  font-size: 0.92rem;
}

.profile-setting-help,
.profile-error {
  color: var(--muted);
  font-size: 0.78rem;
}

.profile-error {
  margin: 2px 4px 0;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  font-size: clamp(1.7rem, 3vw, 2.7rem);
  line-height: 1.05;
}

h2 {
  margin-bottom: 0;
  font-size: 1.45rem;
}

.muted {
  color: var(--muted);
}

.hidden {
  display: none !important;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin: 10px 0 12px;
}

.section-heading-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.section-heading > div:first-child,
#playlistHero > div {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
}

.section-heading > div:first-child .eyebrow,
#playlistHero > div .eyebrow {
  margin-bottom: 0;
}

.section-heading > div:first-child .muted,
#playlistHero > div .muted {
  flex-basis: 100%;
  margin-top: 4px;
}

/* --- Botón Crear FAB (Estilo Drive) --- */
.fab-create {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--primary);
  color: #000;
  border: none;
  border-radius: 16px;
  padding: 10px 18px;
  font-size: 0.95rem;
  font-weight: 650;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(var(--primary-rgb), 0.25);
  transition: transform 0.2s cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 0.2s ease, background 0.2s ease;
  z-index: 50;
}

.fab-create:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(var(--primary-rgb), 0.4);
  filter: brightness(1.15);
}

.fab-create svg {
  width: 20px;
  height: 20px;
}

@media (max-width: 820px) {
  .fab-create {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 60px;
    height: 60px;
    padding: 0;
    border-radius: 20px; /* Squircle style */
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4), 0 4px 12px rgba(var(--primary-rgb), 0.3);
  }
  .fab-create .fab-text {
    display: none;
  }
  .fab-create svg {
    width: 28px;
    height: 28px;
  }
}

.nlm-account:empty,
.profile-settings:empty {
  display: none;
}

.nlm-account-eyebrow {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  opacity: 0.6;
}

.chapters-grid {
  display: grid;
  gap: 10px;
}

.chapter-card {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr) auto;
  align-items: center;
  gap: 16px;
  border: 0;
  border-radius: var(--radius);
  background: rgba(24, 24, 24, 0.86);
  color: var(--text);
  padding: 14px 16px;
  text-align: left;
  cursor: pointer;
  transition: transform 160ms ease, background 160ms ease;
}

.chapter-card:hover {
  background: var(--panel-strong);
  transform: translateY(-2px);
}

.chapter-number {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border: 1px solid rgba(var(--primary-rgb), 0.28);
  border-radius: 8px;
  background: rgba(var(--primary-rgb), 0.08);
  color: var(--primary);
  font-weight: 800;
}

.chapter-main {
  min-width: 0;
}

.chapter-title {
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 750;
}

.chapter-meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.chapter-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 6px;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: #d8d8d8;
  padding: 4px 8px;
  font-size: 0.75rem;
}

.playlist-hero {
  display: block;
  margin: 8px 0 16px;
  padding: 14px 0 8px;
  border-bottom: 1px solid var(--line);
}

.playlist-hero h2 {
  font-size: clamp(2rem, 6vw, 4.8rem);
  line-height: 0.95;
}

.chapter-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: -4px 0 14px;
}

.chapter-nav-button {
  min-width: 156px;
  max-width: 100%;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  padding: 10px 14px;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chapter-nav-button:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.1);
}

/* Botón compacto solo-ícono: reduce espacio en la cabecera de detalle. */
.chapter-nav-button.icon-only {
  min-width: 0;
  width: 44px;
  height: 44px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  line-height: 1;
}

.chapter-nav-button:disabled {
  cursor: not-allowed;
  opacity: 0.38;
}

.chapter-position {
  color: var(--muted);
  font-size: 0.9rem;
}

.playlist-layout {
  display: grid;
  grid-template-columns: 170px minmax(720px, 1fr);
  gap: 12px;
  align-items: start;
}

.filters-panel,
.playlist-panel {
  border-radius: var(--radius);
  background: rgba(24, 24, 24, 0.86);
}

.filters-panel {
  position: sticky;
  top: 18px;
  padding: 16px;
}

.type-filters {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.filter-check {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #e8e8e8;
  cursor: pointer;
}

.filter-check input {
  width: 16px;
  height: 16px;
  accent-color: var(--primary);
}

.playlist-panel {
  overflow: hidden;
}

.with-side-viewer .playlist-layout {
  width: 100%;
  max-width: none;
  grid-template-columns: 170px minmax(760px, 1fr) minmax(560px, 760px);
}

.side-panel {
  position: sticky;
  top: 16px;
  z-index: 1;
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr);
  width: 100%;
  height: min(620px, calc(100vh - 32px));
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(18, 18, 18, 0.98);
  box-shadow: 0 18px 64px rgba(0, 0, 0, 0.34);
}

.side-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px 8px;
  border-bottom: 1px solid var(--line);
}

.side-header h2 {
  overflow: hidden;
  max-width: 100%;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.side-panel .overlay-controls {
  min-height: 40px;
  padding: 6px 12px;
}

.side-panel .overlay-body {
  min-height: 0;
  overflow: auto;
}

.side-type-video .overlay-body,
.side-type-video_short .overlay-body,
.side-type-cinematic_video .overlay-body,
.side-type-slide_deck .overlay-body,
.side-type-infographic .overlay-body {
  display: grid;
  overflow: hidden;
  place-items: center;
}

.side-panel .overlay-media,
.side-panel .overlay-image,
.side-panel .slide-page-image {
  width: 100%;
  height: auto;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.side-panel .overlay-image {
  padding: 10px;
}

.side-panel .slide-page-image {
  margin: 0;
}

.side-panel .quiz-view {
  max-width: none;
  width: 100%;
  padding: 16px;
}

.side-panel:fullscreen {
  height: 100vh;
  border-radius: 0;
}

.playlist-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 18px 12px;
}

.table-head,
.playlist-item {
  display: grid;
  grid-template-columns: 36px minmax(420px, 1.9fr) 112px 102px 96px 122px;
  gap: 8px;
  align-items: center;
}

.table-head {
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.78rem;
  padding: 8px 12px;
  text-transform: uppercase;
}

.playlist-list {
  list-style: none;
  margin: 0;
  padding: 6px;
}

.playlist-item {
  min-height: 62px;
  border-radius: 6px;
  padding: 10px;
  color: #e9e9e9;
}

.playlist-item:hover {
  background: rgba(255, 255, 255, 0.07);
}

.row-index {
  color: var(--muted);
  text-align: right;
}

.artifact-name {
  min-width: 0;
}

.artifact-title {
  overflow: hidden;
  margin: 0 0 4px;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 650;
}

.title-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
  align-items: center;
  margin-bottom: 5px;
}

.title-input-wrap {
  position: relative;
  display: block;
  min-width: 0;
}

.artifact-title-input {
  width: 100%;
  min-width: 0;
  border: 1px solid transparent;
  border-radius: 6px;
  background: transparent;
  color: var(--text);
  padding: 7px 8px;
  font-weight: 700;
  text-overflow: ellipsis;
}

.artifact-title-input.has-quiz-score {
  padding-right: 62px;
}

.quiz-title-score {
  display: inline-flex;
  align-items: center;
  position: absolute;
  top: 50%;
  right: 6px;
  transform: translateY(-50%);
  justify-content: center;
  min-width: 48px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  padding: 4px 8px;
  font-size: 0.76rem;
  font-weight: 800;
  white-space: nowrap;
}

.artifact-title-input:hover,
.artifact-title-input:focus {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.06);
  outline: none;
}

.icon-action,
.audio-button {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
  cursor: pointer;
  padding: 0;
}

.icon-action.compact {
  width: 26px;
  height: 26px;
}

.icon-action:hover:not(:disabled),
.audio-button:hover {
  background: var(--primary-soft);
  border-color: rgba(var(--primary-rgb), 0.45);
  color: var(--primary);
}

.icon-action:disabled {
  cursor: wait;
  opacity: 0.56;
}

.local-line {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 7px;
  margin: 5px 0 0;
  font-size: 0.76rem;
  line-height: 1.35;
  white-space: normal;
}

.local-path {
  flex-basis: 100%;
  overflow-wrap: anywhere;
  word-break: break-word;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.local-label {
  font-weight: 750;
}

.audio-controls {
  display: grid;
  grid-template-columns: repeat(3, 34px) minmax(150px, 1fr) auto auto;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
}

.audio-seek {
  --audio-progress: 0%;
  width: 100%;
  height: 6px;
  border-radius: 999px;
  appearance: none;
  background: linear-gradient(90deg, var(--primary) 0 var(--audio-progress), rgba(255, 255, 255, 0.18) var(--audio-progress) 100%);
  cursor: pointer;
}

.audio-seek:disabled {
  cursor: wait;
  opacity: 0.55;
}

.audio-seek::-webkit-slider-thumb {
  width: 14px;
  height: 14px;
  border: 0;
  border-radius: 50%;
  appearance: none;
  background: var(--text);
}

.audio-seek::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border: 0;
  border-radius: 50%;
  background: var(--text);
}

.audio-time {
  color: var(--muted);
  font-size: 0.76rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.media-progress-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 48px;
  min-height: 28px;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
  font-size: 0.76rem;
  font-weight: 850;
  font-variant-numeric: tabular-nums;
  line-height: 1;
  white-space: nowrap;
}
.media-progress-badge.is-complete {
  border-color: rgba(71, 255, 161, 0.72);
  background: linear-gradient(135deg, rgba(71, 255, 161, 0.28), rgba(255, 255, 255, 0.12));
  color: #baffd7;
  animation: mediaCompletePop 0.7s cubic-bezier(.2, 1.6, .34, 1), mediaCompleteGlow 1.6s ease-in-out infinite alternate;
}
@keyframes mediaCompletePop {
  0% { transform: scale(0.76); opacity: 0.45; }
  58% { transform: scale(1.12); opacity: 1; }
  100% { transform: scale(1); opacity: 1; }
}
@keyframes mediaCompleteGlow {
  from { box-shadow: 0 0 0 rgba(71, 255, 161, 0); }
  to { box-shadow: 0 0 22px rgba(71, 255, 161, 0.36); }
}
@keyframes feedMediaCompletePop {
  0% { transform: translateX(-50%) scale(0.76); opacity: 0.45; }
  58% { transform: translateX(-50%) scale(1.12); opacity: 1; }
  100% { transform: translateX(-50%) scale(1); opacity: 1; }
}

.local-ok {
  color: var(--primary);
}

.local-missing {
  color: var(--muted);
}

.artifact-actions {
  display: flex;
  justify-content: center;
  gap: 6px;
}

.artifact-subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.icon-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  color: #d8d8d8;
  font-size: 0.9rem;
}

.icon {
  display: inline-grid;
  place-items: center;
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--primary);
}

.status-completed .icon {
  color: var(--primary);
  background: var(--primary-soft);
}

.status-failed .icon {
  color: var(--red);
}

.status-pending .icon {
  color: var(--yellow);
}

.empty-state {
  margin: 0;
  padding: 32px 18px;
  color: var(--muted);
}

@media (max-width: 820px) {
  /* Red de seguridad: en móvil ningún descendiente ancho debe empujar el ancho
     de la página y desplazar todo (los descuadres). Los paneles sticky ya pasan
     a static en este breakpoint, así que ocultar el overflow horizontal aquí no
     rompe nada. Los componentes anchos de verdad (matriz) scrollean por dentro. */
  html,
  body {
    overflow-x: hidden;
  }

  .app-shell {
    width: min(100% - 10px, 1920px);
    padding-top: 12px;
  }

  /* Las pestañas de sección no caben en el ancho del móvil: que scrolleen
     horizontalmente para que "Progreso" siga siendo alcanzable (antes se
     recortaba y con overflow-x oculto en el body ya no habría forma de verlo). */
  .section-switch {
    margin-left: 0;
    max-width: 100%;
    min-width: 0;
    overflow-x: auto;
    scrollbar-width: none;
  }
  .section-switch::-webkit-scrollbar { display: none; }
  .section-tab { flex: 0 0 auto; }

  /* La cabecera de detalle de libro apila título y herramientas en vez de
     dejar que la fila de botones (Continuar curso / Editar / Re-analizar) se
     salga del viewport. */
  .book-detail-head {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }

  .book-detail-tools {
    flex-wrap: wrap;
  }

  .book-chapter-head {
    flex-direction: column;
  }

  .book-chapter-actions {
    flex-wrap: wrap;
  }

  /* La matriz de recursos es intrínsecamente ancha (una columna por tipo):
     que scrollee horizontalmente dentro de su caja en vez de recortarse. */
  .resource-matrix {
    overflow-x: auto;
  }

  .section-heading,
  .playlist-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 4px;
    margin: 12px 0 12px;
  }

  .chapter-card {
    grid-template-columns: 48px minmax(0, 1fr);
  }

  .chapter-tags {
    grid-column: 2;
    justify-content: flex-start;
  }

  .chapter-nav {
    flex-direction: row;
    flex-wrap: nowrap;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
  }

  .chapter-nav-button {
    width: 100%;
  }

  .chapter-nav .chapter-nav-button {
    flex: 1;
    min-width: 0;
    width: auto;
    padding: 8px 10px;
    font-size: 0.85rem;
  }

  .chapter-position {
    flex: 0 0 auto;
    text-align: center;
    font-size: 0.85rem;
    font-weight: 600;
  }

  .playlist-layout,
  .with-side-viewer .playlist-layout {
    width: auto;
    max-width: none;
    grid-template-columns: 1fr;
  }

  .side-panel {
    position: static;
    width: auto;
    min-width: 0;
    height: min(80vh, 760px);
  }

  .filters-panel {
    position: static;
  }

  .type-filters {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .table-head {
    display: none;
  }

  .playlist-item {
    grid-template-columns: 34px minmax(0, 1fr);
  }

  .playlist-item > .icon-label,
  .playlist-item > .date-cell,
  .playlist-item > .artifact-actions {
    grid-column: 2;
  }

  .audio-controls {
    grid-template-columns: repeat(3, 34px);
  }

  .audio-seek,
  .audio-time {
    grid-column: 1 / -1;
  }

  .title-form {
    grid-template-columns: 1fr;
  }

  .artifact-actions {
    justify-content: stretch;
  }
}


.resource-overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(0, 0, 0, 0.38);
  backdrop-filter: blur(2px);
}

.overlay-panel {
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr);
  /* Columna definida a 1fr con mínimo 0: sin esto la columna implícita se
     dimensiona a `auto` (max-content) y el <audio> nativo (o un título largo)
     ensancha el grid más allá del panel; overflow:hidden recorta entonces la
     cabecera y empuja las acciones (incl. la × de cerrar) fuera de pantalla. */
  grid-template-columns: minmax(0, 1fr);
  width: min(1500px, calc(100vw - 48px));
  height: min(900px, calc(100dvh - 48px));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(18, 18, 18, 0.96);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.55);
  overflow: hidden;
}

/* En pantalla completa el panel debe ocupar TODO el viewport; si no, el ancho
   y alto fijos de arriba lo dejan flotando a 900px sobre negro y la infografía
   se ve pequeña. */
.overlay-panel:fullscreen {
  width: 100vw;
  height: 100vh;
  max-width: none;
  border: 0;
  border-radius: 0;
}

.overlay-panel:fullscreen .overlay-image {
  padding: 0;
}

.overlay-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 16px 18px 12px;
  border-bottom: 1px solid var(--line);
}

.overlay-header > div:first-child {
  min-width: 0;
  flex: 1;
}

.overlay-header h2 {
  margin: 0;
  overflow: hidden;
  max-width: 100%;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.overlay-actions,
.overlay-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.overlay-controls {
  min-height: 48px;
  padding: 10px 18px;
  border-bottom: 1px solid var(--line);
}

.overlay-nav-button {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
  cursor: pointer;
  padding: 8px 12px;
}

.overlay-nav-button:hover:not(:disabled) {
  background: var(--primary-soft);
  border-color: rgba(var(--primary-rgb), 0.45);
}

.overlay-nav-button:disabled {
  cursor: not-allowed;
  opacity: 0.42;
}

.overlay-body {
  min-height: 0;
  overflow: auto;
  background: #080808;
}

.overlay-media,
.overlay-frame,
.overlay-image {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
}

.overlay-media {
  background: #000;
}

.resource-type-video .overlay-panel,
.resource-type-video_short .overlay-panel,
.resource-type-cinematic_video .overlay-panel {
  height: auto;
  max-height: calc(100dvh - 48px);
  grid-template-rows: auto auto auto;
}

.resource-type-video .overlay-header,
.resource-type-video_short .overlay-header,
.resource-type-cinematic_video .overlay-header {
  padding: 12px 18px 10px;
}

.resource-type-video .overlay-controls,
.resource-type-video_short .overlay-controls,
.resource-type-cinematic_video .overlay-controls {
  min-height: 40px;
  padding: 6px 18px;
}

.resource-type-video .overlay-body,
.resource-type-video_short .overlay-body,
.resource-type-cinematic_video .overlay-body {
  overflow: hidden;
}

.resource-type-video .overlay-media,
.resource-type-video_short .overlay-media,
.resource-type-cinematic_video .overlay-media {
  height: auto;
  max-height: calc(100dvh - 184px);
  aspect-ratio: 16 / 9;
  object-fit: contain;
}

.overlay-image {
  object-fit: contain;
  padding: 18px;
}

.script-view {
  display: block;
  width: 100%;
  height: 100%;
  overflow-y: auto;
  padding: 24px 32px;
  line-height: 1.6;
  text-align: left;
  box-sizing: border-box;
}

.script-view h1,
.script-view h2,
.script-view h3,
.script-view h4 {
  margin: 1.1em 0 0.4em;
  line-height: 1.3;
}

.script-view p { margin: 0.6em 0; }

.script-view code {
  background: rgba(255, 255, 255, 0.08);
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 0.92em;
}

.slide-page-loader,
.overlay-error {
  display: grid;
  min-height: 100%;
  place-items: center;
  color: var(--muted);
}

.slide-page-image {
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
  max-height: 100%;
  margin: 0 auto;
  object-fit: contain;
}

.quiz-view {
  display: grid;
  gap: 16px;
  max-width: 980px;
  margin: 0 auto;
  padding: 24px;
}

.overlay-controls:empty {
  display: none;
}

.overlay-panel:has(.overlay-controls:empty),
.side-panel:has(.overlay-controls:empty) {
  grid-template-rows: auto minmax(0, 1fr);
}

.resource-type-flashcard .overlay-panel,
.resource-type-flashcards .overlay-panel {
  grid-template-rows: auto minmax(0, 1fr);
  width: min(1040px, 96vw);
  height: auto;
  max-height: min(760px, 92vh);
}

/* El quiz muestra una sola pregunta a la vez, así que el contenido es corto:
   con la altura fija del panel quedaba pegado arriba y con un gran hueco negro
   debajo (se veía "descuadrado"). Que el panel se ajuste a su contenido, igual
   que las flashcards, y que el cuerpo haga scroll si una pregunta larga o ya
   evaluada lo excede. */
.resource-type-quiz .overlay-panel {
  width: min(1040px, 96vw);
  height: auto;
  max-height: min(900px, 92vh);
}

/* La caja de resultado nace vacía (solo se llena al terminar el intento): sin
   contenido no debe pintar su borde y colgar como una barra suelta. */
.quiz-result:empty {
  display: none;
}

.resource-type-flashcard .overlay-body,
.resource-type-flashcards .overlay-body {
  background:
    radial-gradient(900px 360px at 50% -20%, rgba(var(--primary-rgb), 0.13), transparent 62%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.025), transparent 42%),
    #070707;
}

/* Flashcards: una tarjeta a la vez con flip anverso/reverso y navegación. */
.overlay-body:has(.flashcard-view),
.side-panel .overlay-body:has(.flashcard-view) {
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: auto;
}

.flashcard-view {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: min(720px, 100%);
  margin: 0 auto;
  padding: 26px 24px 28px;
}

.flashcard-topline,
.flashcard-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.flashcard-progress {
  height: 6px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.09);
  overflow: hidden;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04);
}

.flashcard-progress-fill {
  display: block;
  height: 100%;
  width: 0;
  border-radius: inherit;
  background: linear-gradient(90deg, #60f58f, var(--primary));
  box-shadow: 0 0 18px rgba(var(--primary-rgb), 0.45);
  transition: width 0.3s ease;
}

.flashcard {
  perspective: 1600px;
  height: clamp(270px, 42vh, 390px);
  cursor: pointer;
  outline: none;
}

.flashcard:focus-visible .flashcard-face {
  border-color: rgba(var(--primary-rgb), 0.72);
  box-shadow: 0 0 0 3px var(--primary-soft), 0 18px 48px rgba(0, 0, 0, 0.45);
}

.flashcard-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.5s cubic-bezier(0.22, 0.61, 0.36, 1);
}

.flashcard:hover .flashcard-inner {
  transform: translateY(-3px);
}

.flashcard.flipped .flashcard-inner,
.flashcard.flipped:hover .flashcard-inner {
  transform: rotateY(180deg);
}

.flashcard-face {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
  padding: 38px 42px;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 18px;
  color: var(--text);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  overflow: auto;
  box-shadow: 0 20px 54px rgba(0, 0, 0, 0.5);
}

.flashcard-face > *:first-child {
  margin-top: auto;
}
.flashcard-face > *:last-child {
  margin-bottom: auto;
}

.flashcard:hover .flashcard-face {
  border-color: rgba(255, 255, 255, 0.24);
}

.flashcard-front {
  background:
    radial-gradient(460px 230px at 50% 0%, rgba(255, 255, 255, 0.08), transparent 70%),
    linear-gradient(145deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.012)),
    var(--panel-strong);
}

.flashcard-back {
  transform: rotateY(180deg);
  background:
    radial-gradient(500px 260px at 50% 0%, rgba(var(--primary-rgb), 0.18), transparent 72%),
    linear-gradient(145deg, rgba(var(--primary-rgb), 0.08), rgba(255, 255, 255, 0.012)),
    var(--panel-strong);
  border-color: rgba(var(--primary-rgb), 0.34);
}

.flashcard-face-label,
.flashcard-mode {
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  padding: 5px 9px;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.flashcard-back .flashcard-face-label,
.flashcard-mode {
  color: var(--primary);
  background: rgba(var(--primary-rgb), 0.09);
  border-color: rgba(var(--primary-rgb), 0.22);
}

.flashcard-text {
  width: 100%;
  max-width: 100%;
  font-size: clamp(1.08rem, 1.55vw, 1.34rem);
  font-weight: 750;
  line-height: 1.36;
}

.flashcard-back .flashcard-text {
  font-size: clamp(0.98rem, 1.3vw, 1.12rem);
  font-weight: 500;
  line-height: 1.52;
}

.flashcard-hint {
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
}

.flashcard-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
}

.flashcard-flip-button {
  min-width: 126px;
  border-color: rgba(var(--primary-rgb), 0.36);
  background: rgba(var(--primary-rgb), 0.13);
}

.flashcard-counter {
  color: var(--muted);
  font-weight: 750;
  font-variant-numeric: tabular-nums;
}

.side-panel .flashcard-view {
  width: 100%;
  padding: 16px;
}

.side-panel .flashcard {
  height: clamp(230px, 38vh, 330px);
}

@media (max-width: 760px) {
  .resource-type-flashcard .overlay-panel,
  .resource-type-flashcards .overlay-panel {
    max-height: 94vh;
  }

  .flashcard-view {
    padding: 18px 14px 20px;
  }

  .flashcard-topline,
  .flashcard-footer {
    align-items: stretch;
    flex-direction: column;
  }

  .flashcard {
    height: clamp(250px, 48vh, 360px);
  }

  .flashcard-face {
    padding: 28px 20px;
  }

  .flashcard-nav {
    justify-content: stretch;
  }

  .flashcard-nav .overlay-nav-button {
    flex: 1 1 0;
  }

  /* En móvil el pie del quiz (3 elementos con space-between) se apretaba y
     desbordaba: lo apilamos y estiramos los botones. */
  .quiz-view {
    padding: 16px;
  }

  .quiz-footer {
    flex-wrap: wrap;
  }

  .quiz-footer .overlay-nav-button {
    flex: 1 1 auto;
  }

  .quiz-nav .overlay-nav-button {
    flex: 0 0 auto;
  }
}

.quiz-last-score,
.quiz-result {
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius);
  color: var(--text);
  padding: 12px 14px;
  font-weight: 700;
}

.score-low {
  border-color: rgba(241, 93, 93, 0.58);
  background: rgba(241, 93, 93, 0.16);
}

.score-warn {
  border-color: rgba(240, 138, 51, 0.62);
  background: rgba(240, 138, 51, 0.16);
}

.score-mid {
  border-color: rgba(248, 193, 74, 0.6);
  background: rgba(248, 193, 74, 0.16);
}

.score-good {
  border-color: rgba(var(--primary-rgb), 0.48);
  background: var(--primary-soft);
}

.quiz-question {
  display: grid;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin: 0;
  padding: 16px;
  background: rgba(255, 255, 255, 0.035);
}

.quiz-question h3 {
  margin: 0 0 2px;
  color: var(--text);
  font-size: 1rem;
  line-height: 1.35;
}

.quiz-question-image {
  display: block;
  width: auto;
  height: auto;
  /* Tope de tamaño mostrado: nunca más ancho que el contenedor ni que ~560px,
     y con alto acotado, para que un PNG grande no domine la pregunta. */
  max-width: min(100%, 560px);
  max-height: 340px;
  object-fit: contain;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  margin: 4px 0;
  cursor: zoom-in;
}

.quiz-question-image.zoomed {
  max-width: 100%;
  max-height: none;
  cursor: zoom-out;
}


.math-inline {
  display: inline-flex;
  align-items: baseline;
  gap: 1px;
  padding: 0 2px;
  color: #f4f4f4;
  font-family: "Times New Roman", Cambria, Georgia, serif;
  font-style: italic;
  white-space: nowrap;
}

.math-inline sub,
.math-inline sup {
  font-size: 0.72em;
  line-height: 0;
}

.math-frac {
  display: inline-grid;
  grid-template-rows: auto auto;
  vertical-align: middle;
  text-align: center;
  font-size: 0.88em;
}

.math-frac > span:first-child {
  border-bottom: 1px solid currentColor;
  padding: 0 2px 1px;
}

.math-frac > span:last-child {
  padding: 1px 2px 0;
}

.quiz-option {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  border: 1px solid transparent;
  border-radius: 6px;
  padding: 10px;
  cursor: pointer;
}

.quiz-option:hover {
  background: rgba(255, 255, 255, 0.06);
}

.quiz-option.correct {
  border-color: rgba(var(--primary-rgb), 0.45);
  background: rgba(var(--primary-rgb), 0.1);
}

.quiz-option.incorrect {
  border-color: rgba(241, 93, 93, 0.55);
  background: rgba(241, 93, 93, 0.1);
}

.quiz-hint-toggle {
  justify-self: start;
  width: fit-content;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.055);
  color: var(--muted);
  font: inherit;
  font-size: 0.8rem;
  font-weight: 750;
  padding: 6px 10px;
  cursor: pointer;
}

.quiz-hint-toggle:hover {
  border-color: rgba(var(--primary-rgb), 0.45);
  color: var(--primary);
}

.quiz-question-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.quiz-evaluate {
  border: 1px solid var(--primary);
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font: inherit;
  font-size: 0.82rem;
  font-weight: 750;
  padding: 6px 16px;
  cursor: pointer;
}
.quiz-evaluate:hover:not(:disabled) {
  background: rgba(var(--primary-rgb), 0.18);
}
.quiz-evaluate:disabled {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.04);
  color: var(--muted);
  cursor: default;
}

.quiz-verdict {
  margin: 2px 0 0;
  font-size: 0.86rem;
  font-weight: 750;
}
.quiz-verdict.correct { color: var(--primary); }
.quiz-verdict.incorrect { color: var(--red); }
.quiz-question.evaluated { border-color: rgba(255, 255, 255, 0.16); }

.math-over {
  text-decoration: overline;
  text-decoration-thickness: 1px;
}

.quiz-hint,
.quiz-rationale {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.45;
}

.quiz-rationale {
  color: #d8d8d8;
}

.quiz-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

/* Navegación pregunta-a-pregunta del quiz. */
.quiz-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 4px 0 16px;
}
.quiz-nav .quiz-progress {
  font-weight: 650;
}
.quiz-nav .overlay-nav-button:disabled {
  opacity: 0.4;
  cursor: default;
}

/* Botón "Preguntar al tutor" por pregunta (chat acotado a esa pregunta). */
.quiz-chat {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 0.82rem;
  font-weight: 650;
  padding: 6px 14px;
  cursor: pointer;
  margin-left: auto;
}
.quiz-chat:hover {
  color: var(--text, #fff);
  border-color: rgba(255, 255, 255, 0.32);
}

@media (max-width: 1100px) {
  .table-head,
  .playlist-item {
    grid-template-columns: 34px minmax(320px, 1fr) 104px 98px 88px 122px;
  }

}

/* --- Conmutador de secciones --- */
.section-switch {
  display: inline-flex;
  gap: 4px;
  margin-left: 16px;
  padding: 3px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 999px;
}
.section-tab,
.create-tab {
  border: none;
  background: transparent;
  color: var(--muted);
  padding: 6px 16px;
  border-radius: 999px;
  cursor: pointer;
}
.section-tab.is-active,
.create-tab.is-active {
  background: var(--primary-soft);
  color: var(--primary);
}

/* --- Subida de libro --- */
#booksView {
  width: 100%;
  max-width: 1500px;
  min-width: 0;
  margin: 0 auto;
}

.books-top {
  display: block;
  margin: 0 0 20px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  background: rgba(18, 18, 18, 0.5);
  padding: 10px 12px;
}
.book-upload-panel {
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.book-upload {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 1.25fr) auto;
  gap: 12px;
  align-items: center;
  margin: 0;
}
.book-file {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-width: 0;
  max-width: 100%;
  padding: 9px 14px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  cursor: pointer;
  overflow: hidden;
}
.book-file span {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.book-file input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}
.book-title-input {
  min-width: 0;
  width: 100%;
  padding: 9px 12px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--text);
}
.book-upload-metadata {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  min-width: 0;
  padding-top: 4px;
}
.book-upload-metadata-title {
  color: var(--muted);
  font-size: 0.85rem;
}
.book-upload-metadata .engine-grid {
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  margin: 0;
  gap: 10px;
}
.book-upload-metadata .engine-note {
  margin: 0;
  min-height: 43px;
}
.book-upload-panel #bookUploadStatus {
  margin: 8px 0 0;
}
.books-metrics-slot {
  min-width: 0;
}
.books-list {
  display: block;
  margin-top: 0;
}

/* --- Detalle de libro y capítulos --- */
.book-detail-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 12px;
}
.engine-select {
  color: var(--muted);
  font-size: 0.85rem;
}
.engine-select select,
select.engine-select {
  margin-left: 8px;
  padding: 6px 10px;
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.profile-setting-row select.engine-select {
  width: 100%;
  margin-left: 0;
  background: #2b2c30;
}
.book-chapter {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 14px 16px;
  margin-bottom: 14px;
}
.book-chapter-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 10px;
}
.book-chapter-head h3 {
  margin: 0 0 4px;
}
.book-chapter-head .muted {
  font-weight: 400;
  margin-left: 6px;
}
.book-chapter-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

/* --- Matriz de recursos --- */
.resource-matrix {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.matrix-row {
  display: grid;
  grid-template-columns: minmax(240px, 2fr) repeat(var(--cols), minmax(180px, 1fr));
  align-items: center;
  border-top: 1px solid var(--line);
}
.matrix-row:first-child {
  border-top: none;
}
.matrix-head {
  background: var(--panel-strong);
  color: var(--muted);
  font-size: 0.8rem;
}
.matrix-name {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
}
.matrix-col {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 7px 6px;
  border-left: 1px solid var(--line);
  text-align: center;
}
/* La etiqueta de tipo por celda solo se usa en móvil (en desktop el tipo lo
   da la cabecera de columna). */
.matrix-col-label {
  display: none;
}
.matrix-letter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 5px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 600;
}
.matrix-depth-1 .matrix-name { padding-left: 30px; }
.matrix-depth-2 .matrix-name { padding-left: 52px; color: var(--muted); }
.matrix-depth-1 { background: rgba(255, 255, 255, 0.015); }
.matrix-depth-2 { background: rgba(255, 255, 255, 0.03); }

.cell-btn {
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  border-radius: 6px;
  width: 26px;
  height: 26px;
  cursor: pointer;
  line-height: 1;
}
.cell-btn:hover:not(:disabled) {
  background: var(--primary-soft);
  border-color: var(--primary);
}
.cell-btn:disabled {
  opacity: 0.4;
  cursor: default;
}
.cell-generate {
  color: var(--muted);
}
/* Celda con recursos: navegación de variantes arriba (solo si hay varias) y
   una fila de acciones limpia abajo, sin wrapping desordenado. */
.cell-ready,
.cell-variants {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.cell-nav,
.cell-actions {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  flex-wrap: wrap;
}
.cell-nav {
  gap: 2px;
}
.variant-counter {
  min-width: 30px;
  color: var(--muted);
  font-size: 0.72rem;
  font-variant-numeric: tabular-nums;
}
.cell-delete {
  color: var(--red);
}
.cell-delete:hover:not(:disabled) {
  border-color: var(--red);
  background: rgba(241, 93, 93, 0.12);
}
.cell-play {
  color: var(--primary);
  border-color: var(--primary);
}

/* Meta de páginas dentro de la celda de nombre de la matriz */
.matrix-name-text {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  flex: 1 1 auto;
  width: 100%;
}
.matrix-node-title {
  display: block;
  font-weight: 500;
  color: var(--text);
  margin-right: auto;
}
.matrix-node-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
.matrix-meta {
  display: inline-block;
  font-size: 0.72rem;
  color: var(--muted);
}
.matrix-node-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}
.matrix-node-actions .page-jump {
  margin-left: 0;
}
.matrix-node-actions .mini-gen {
  margin-top: 0;
}

/* En móvil la matriz (modo Generación) se vuelve una tarjeta apilada por fila:
   el nombre ocupa toda la línea y las celdas de tipo fluyen debajo como chips
   con su propia etiqueta, en vez de una tabla ancha que se sale del viewport. */
@media (max-width: 760px) {
  .resource-matrix {
    overflow: visible;
    border: none;
    background: none;
  }
  .matrix-head {
    display: none !important;
  }
  .matrix-row {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    align-items: flex-start;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--panel);
    padding: 10px;
    margin-bottom: 8px;
  }
  .matrix-depth-1,
  .matrix-depth-2 {
    background: var(--panel);
  }
  .matrix-name {
    flex: 1 1 100%;
    padding: 0 0 6px 0;
    margin-bottom: 2px;
    border-bottom: 1px solid var(--line);
    align-items: flex-start;
  }
  .matrix-depth-1 .matrix-name {
    padding-left: 14px;
    border-left: 2px solid var(--primary-soft);
  }
  .matrix-depth-1 .matrix-node-title::before {
    content: "↳ ";
    color: var(--primary-soft);
    font-weight: 400;
  }
  .matrix-depth-2 .matrix-name {
    padding-left: 28px;
    border-left: 2px solid var(--line);
  }
  .matrix-depth-2 .matrix-node-title::before {
    content: "• ";
    color: var(--muted);
    font-weight: 400;
  }
  .matrix-col {
    flex: 0 1 auto;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-start;
    gap: 8px;
    padding: 6px 12px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: var(--panel-strong);
    width: auto;
    max-width: 100%;
  }
  .matrix-col-label {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.75rem;
    color: var(--text);
    font-weight: 500;
    min-width: 0;
  }
  .matrix-col-label svg {
    width: 14px;
    height: 14px;
    flex: none;
  }
  .matrix-col .cell-ready,
  .matrix-col .cell-variants {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    width: auto;
  }
  .matrix-col .cell-nav,
  .matrix-col .cell-actions {
    flex-direction: row;
    justify-content: flex-start;
    gap: 3px;
    width: auto;
  }
  .matrix-col .cell-btn {
    width: 24px;
    height: 24px;
    font-size: 0.8rem;
    border-radius: 5px;
  }
  .matrix-col .engine-badge {
    width: 20px;
    height: 20px;
    font-size: 0.65rem;
    line-height: 20px;
  }
}

.book-detail-tools {
  display: flex;
  align-items: center;
  gap: 12px;
}

.book-action-status {
  min-height: 1.2em;
  margin: -4px 0 12px;
}

/* Cabecera de detalle de libro/capítulo */
.book-head-left {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  max-width: 100%;
}
.book-head-left h2 {
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}
.book-card-summary {
  margin: 6px 0 0;
  font-size: 0.85rem;
  color: var(--muted);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.book-chapter-card {
  text-align: left;
  align-items: flex-start;
}

/* Botón para generar conceptos/fórmulas por sección dentro de la matriz */
.mini-gen {
  margin-top: 4px;
  align-self: flex-start;
  background: var(--primary-soft);
  color: var(--primary);
  border: 1px solid var(--primary);
  border-radius: 6px;
  padding: 2px 8px;
  font-size: 0.72rem;
  cursor: pointer;
}
.mini-gen:hover:not(:disabled) { filter: brightness(1.15); }
.mini-gen:disabled { opacity: 0.5; cursor: default; }


.engine-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--text);
  font-size: 0.7rem;
  font-weight: 800;
}
.engine-notebooklm { background: rgba(var(--primary-rgb), 0.16); color: var(--primary); }
.engine-codex { background: rgba(248, 193, 74, 0.16); color: var(--yellow); }
.engine-claude { background: rgba(217, 119, 87, 0.16); color: #d97757; }
.engine-copilot { background: rgba(110, 64, 201, 0.16); color: #8b6ff0; }
.engine-antigravity { background: rgba(0, 198, 255, 0.16); color: #00c6ff; }
/* Icono de proveedor (logo de marca) para la columna Motor de la cola: reusa el
   color por motor de .engine-<token> pero sin el fondo de pastilla del badge. */
.engine-icon { display: inline-flex; align-items: center; justify-content: center; line-height: 0; }
.engine-icon svg { width: 16px; height: 16px; }
.engine-icon.engine-notebooklm { background: transparent; }
.engine-icon.engine-codex { background: transparent; }
.engine-icon.engine-claude { background: transparent; }
.engine-icon.engine-copilot { background: transparent; }
.engine-icon.engine-antigravity { background: transparent; }
.meta-engine { display: inline-flex; align-items: center; gap: 6px; }
.cell-meta { color: var(--muted); font-weight: 800; }
.generation-modal {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: center;
  padding: 18px;
  background: rgba(4, 4, 4, 0.66);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  animation: gen-fade 0.16s ease-out;
}
.generation-dialog {
  width: min(920px, 100%);
  max-height: min(86vh, 900px);
  overflow: auto;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  background:
    radial-gradient(120% 90% at 50% -10%, rgba(var(--primary-rgb), 0.07), transparent 60%),
    var(--panel);
  padding: 24px 24px 20px;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.05) inset,
    0 30px 80px -20px rgba(0, 0, 0, 0.75);
  animation: gen-rise 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);
}
@keyframes gen-fade { from { opacity: 0; } }
@keyframes gen-rise {
  from { opacity: 0; transform: translateY(10px) scale(0.985); }
}
@media (prefers-reduced-motion: reduce) {
  .media-progress-badge.is-complete {
    animation: none;
  }
  .generation-modal, .generation-dialog { animation: none; }
}
.generation-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin: -2px 0 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}
.generation-title { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.generation-eyebrow {
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--primary);
}
.generation-head h3 {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text);
}
.modal-close {
  flex: none;
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 1px solid transparent;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--muted);
  font-size: 1.1rem;
  line-height: 1;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.modal-close:hover { background: rgba(255, 255, 255, 0.1); color: var(--text); }
.modal-close:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

.generation-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.07);
}
.generation-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
  margin-bottom: 4px;
}
.gen-field { margin-bottom: 18px; }
.generation-grid label,
.generation-extra,
.section-count {
  display: flex;
  flex-direction: column;
  gap: 7px;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.field-hint {
  margin: 8px 0 0;
  font-size: 0.82rem;
  line-height: 1.45;
  color: var(--muted);
}
.generation-grid .generation-checkbox {
  flex-direction: row;
  align-items: center;
  color: var(--text);
  text-transform: none;
  letter-spacing: normal;
  font-size: 0.85rem;
}
.generation-grid .generation-checkbox input { width: auto; }

.generation-grid input,
.generation-grid select,
.section-count select,
.generation-extra textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #0d0d0d;
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: normal;
  text-transform: none;
  margin-left: 0;
  padding: 11px 13px;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}
.generation-grid select,
.section-count select {
  appearance: none;
  -webkit-appearance: none;
  padding-right: 40px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='none' stroke='%23a7a7a7' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round' d='M1 1.5 6 6.5 11 1.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  cursor: pointer;
}
.generation-grid input:hover,
.generation-grid select:hover,
.section-count select:hover,
.generation-extra textarea:hover { border-color: #454545; }
.generation-grid input:focus,
.generation-grid select:focus,
.section-count select:focus,
.generation-extra textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
  background: var(--bg);
}
.engine-note {
  grid-column: 1 / -1;
  align-self: end;
  margin: 0;
  padding: 11px 14px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-left: 2px solid var(--primary);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--muted);
  font-size: 0.82rem;
  text-transform: none;
  letter-spacing: normal;
}
.gen-primary {
  border: none;
  background: var(--primary);
  color: #062012;
  font-weight: 800;
  padding: 11px 22px;
}
.gen-primary:hover:not(:disabled) {
  filter: brightness(1.15);
  border: none;
  box-shadow: 0 6px 20px -6px rgba(var(--primary-rgb), 0.6);
}
.gen-primary:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.generation-actions .chapter-nav-button { min-width: 0; padding: 11px 20px; }
.generation-panels {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 12px;
  margin: 12px 0;
}
.generation-panels section {
  min-width: 0;
}
.generation-panels h4 {
  margin: 0 0 6px;
  color: var(--muted);
}
.generation-panels pre,
.metadata-list pre {
  max-height: 280px;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #0c0c0c;
  padding: 10px;
  color: #ddd;
  font-size: 0.78rem;
}
.metadata-list {
  display: grid;
  grid-template-columns: 130px minmax(0, 1fr);
  gap: 8px 12px;
}
.metadata-list dt { color: var(--muted); }
.metadata-list dd { margin: 0; min-width: 0; }
.section-count output {
  color: var(--primary);
  font-weight: 800;
}
@media (max-width: 760px) {
  .generation-panels { grid-template-columns: 1fr; }
  .metadata-list { grid-template-columns: 1fr; }
}

/* --- Modo curso / Generación: tabs --- */
.mode-tabs {
  display: flex;
  gap: 6px;
  margin: 14px 0 16px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 10px;
}
.mode-tab {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  padding: 7px 18px;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 600;
  transition: background .15s ease, color .15s ease, border-color .15s ease;
}
.mode-tab:hover { color: var(--text); }
.mode-tab.is-active {
  background: var(--primary-soft);
  color: var(--primary);
  border-color: var(--primary);
}

/* --- Modo curso: layout camino + panel --- */
.course-layout {
  display: grid;
  grid-template-columns: minmax(260px, 1fr) minmax(280px, 1.1fr);
  gap: 20px;
  align-items: start;
}
.course-path {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.course-node {
  border-left: 2px solid var(--line);
  padding-left: 12px;
  position: relative;
}
.course-node.is-selected { border-left-color: var(--primary); }
.course-node.is-playing { border-left-color: var(--primary); }
.course-node.is-playing > .course-node-head {
  background: var(--primary-soft, rgba(var(--primary-rgb), 0.14));
}
.course-node.is-playing .node-badge { color: var(--primary); }
.course-node-head {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  background: transparent;
  border: none;
  color: var(--text);
  padding: 8px 6px;
  border-radius: var(--radius);
  cursor: pointer;
  text-align: left;
  transition: background .15s ease;
}
.course-node-head:hover { background: var(--panel-strong); }
.course-node.is-selected > .course-node-head { background: var(--panel-strong); }
.node-mark { width: 1.2em; text-align: center; flex: none; }
.node-title { flex: 1; min-width: 0; word-break: break-word; line-height: 1.3; }
.course-node.node-completed .node-mark { color: var(--primary); }
.course-node.node-pending .node-mark { color: var(--yellow); }
.course-path-acts {
  list-style: none;
  margin: 0 0 6px;
  padding: 0 0 0 22px;
  font-size: 13px;
  color: var(--muted);
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.course-path-act { display: flex; align-items: center; gap: 6px; }
.course-path-act .act-mark { width: 1em; text-align: center; }
.course-path-act.act-completed .act-mark { color: var(--primary); }
.course-path-act.act-needs_review .act-mark { color: var(--red); }

/* --- Modo curso: panel del nodo --- */
.course-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
}
.course-panel-head { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 12px; }
.course-panel-head h4 { margin: 0 0 2px; }
.course-panel-head p { margin: 0; font-size: 13px; flex-basis: 100%; }
.course-activities { display: flex; flex-direction: column; gap: 8px; margin: 14px 0; }
.course-activity {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  background: var(--panel-strong);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 12px;
  transition: border-color .15s ease;
}
.course-activity.act-completed { border-color: var(--primary); }
.course-activity.act-needs_review { border-color: var(--red); }
.course-activity.has-note { border-color: rgba(var(--primary-rgb), 0.45); }
.course-activity.is-playing {
  border-color: var(--primary);
  background: var(--primary-soft, rgba(var(--primary-rgb), 0.12));
}
.course-activity.is-playing .act-mark { color: var(--primary); }
.act-playing-tag {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-left: 6px;
}
.act-progress {
  display: inline-block;
  margin-left: 6px;
  padding: 1px 7px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--muted);
}
.course-activity .act-mark { flex: 0 0 1.2em; text-align: center; }
.course-activity.act-completed .act-mark { color: var(--primary); }
.course-activity.act-needs_review .act-mark { color: var(--red); }
.act-name { flex: 1 1 120px; min-width: 120px; word-break: break-word; }
.act-status { flex: 0 0 auto; font-size: 12px; white-space: nowrap; }
.act-actions { flex: 0 0 auto; display: flex; gap: 6px; flex-wrap: wrap; justify-content: flex-end; min-width: 0; margin-left: auto; }
.course-note-text,
.course-note-form {
  flex: 1 0 100%;
  margin-left: calc(1.2em + 10px);
}
.course-note-text {
  margin: -2px 0 0;
  color: var(--text);
  font-size: 13px;
  line-height: 1.45;
  white-space: pre-wrap;
}
.course-note-form {
  display: grid;
  gap: 8px;
}
.course-note-input {
  width: 100%;
  min-height: 72px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--text);
  padding: 9px 10px;
}
.course-note-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
}
.course-note-actions {
  display: flex;
  justify-content: flex-end;
  gap: 6px;
}
.course-mini-btn {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text);
  border-radius: 999px;
  padding: 4px 10px;
  cursor: pointer;
  font-size: 12px;
}
.course-mini-btn:hover { background: var(--panel); }
.course-mini-btn.primary { border-color: var(--primary); color: var(--primary); }
.course-mini-btn.primary:hover { background: var(--primary-soft); }
.course-create { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.course-create-btn {
  border: 1px dashed var(--line);
  background: transparent;
  color: var(--muted);
  border-radius: var(--radius);
  padding: 6px 12px;
  cursor: pointer;
  font-size: 13px;
}
.course-create-btn:hover { color: var(--text); border-color: var(--text); }
.course-create-btn.is-busy {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-style: solid;
  border-color: var(--primary);
  color: var(--primary);
  cursor: default;
}
.course-panel-foot { display: flex; justify-content: flex-end; }
.course-next-btn {
  border: none;
  background: var(--primary);
  color: #04210f;
  font-weight: 800;
  border-radius: 999px;
  padding: 10px 24px;
  cursor: pointer;
  transition: filter .15s ease;
}
.course-next-btn:hover { filter: brightness(1.08); }
.course-done { color: var(--primary); font-weight: 700; }
.course-badge-new {
  display: inline-block;
  background: var(--primary-soft);
  color: var(--primary);
  border-radius: 999px;
  padding: 1px 8px;
  font-size: 11px;
  font-weight: 700;
  margin-left: 6px;
}
.course-mobile-panel { display: none; }
.btn-layout-toggle { display: none; }

@media (max-width: 760px) {
  .btn-layout-toggle { display: inline-block; }

  /* Mobile Accordion Mode */
  .course-layout.layout-accordion { display: block; }
  .course-layout.layout-accordion .desktop-panel { display: none !important; }
  .course-layout.layout-accordion .course-mobile-panel { 
    display: block; 
    margin: 8px 0 16px 0;
    padding: 0 0 0 14px;
    background: transparent;
    border-left: 3px solid var(--primary);
  }
  .course-layout.layout-accordion .course-mobile-panel .course-panel-head h4,
  .course-layout.layout-accordion .course-mobile-panel .course-panel-head p.muted { display: none; }

  /* Mobile Drilldown/Block Mode */
  .course-layout.layout-drilldown { display: flex; flex-direction: column-reverse; gap: 20px; }
  .course-layout.layout-drilldown .course-mobile-panel { display: none !important; }
  .course-layout.layout-drilldown .desktop-panel { display: block !important; }

  /* Grid layout for course activities in mobile */
  .course-activity { display: grid; grid-template-columns: auto 1fr auto; align-items: start; gap: 8px; }
  .course-activity .act-mark { grid-column: 1; padding-top: 2px; }
  .course-activity .act-name { grid-column: 2; margin-bottom: 0; }
  .course-activity .act-status { grid-column: 3; text-align: right; }
  .course-activity .act-actions { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 6px; justify-content: flex-start; margin: 4px 0 0; }
  .course-note-text,
  .course-note-form { grid-column: 1 / -1; margin-left: 0; margin-top: 4px; }
}

/* --- Spinner animado --- */
@keyframes spin { to { transform: rotate(360deg); } }
.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.25);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin .7s linear infinite;
  vertical-align: middle;
}
.spinner-sm { width: 12px; height: 12px; border-width: 2px; }
.cell-loading { display: inline-flex; align-items: center; justify-content: center; }

/* --- Banner global de generación --- */
.gen-banner {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 12px 0;
  padding: 10px 14px;
  border: 1px solid var(--primary);
  border-radius: var(--radius);
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 600;
}

/* --- Cola centralizada de generación --- */
.queue-table {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel);
}
.queue-row {
  display: grid;
  grid-template-columns: 40px minmax(160px, 1.6fr) minmax(140px, 1.4fr) minmax(160px, 1.6fr) minmax(120px, 1fr) 90px minmax(120px, 1fr) 130px 84px 160px 92px;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border-top: 1px solid var(--line);
  font-size: 0.9rem;
}
.queue-row:first-child { border-top: none; }
.queue-head {
  background: var(--panel-strong);
  color: var(--muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.queue-num { color: var(--muted); text-align: right; padding-right: 6px; }
.queue-cell { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.queue-cell.queue-chapter, .queue-cell.queue-node { color: var(--muted); }
.queue-cell.queue-type { display: flex; align-items: center; gap: 5px; }
.queue-cell.queue-engine { color: var(--muted); font-size: 0.82rem; }
.queue-cell.queue-user { display: flex; align-items: center; gap: 6px; font-size: 0.82rem; color: var(--muted); }
.queue-cell.queue-duration { font-variant-numeric: tabular-nums; font-size: 0.85rem; }
.queue-cell.queue-when { color: var(--muted); font-size: 0.8rem; font-variant-numeric: tabular-nums; }
.queue-row[data-queue-log] { cursor: pointer; }
.queue-row[data-queue-log]:hover { background: rgba(255, 255, 255, 0.03); }
.queue-row.is-running { background: var(--primary-soft); }
.queue-row.is-running .queue-book { display: flex; align-items: center; gap: 8px; color: var(--primary); font-weight: 600; }
.queue-runs {
  color: var(--muted);
  font-size: 0.75rem;
  margin-left: 4px;
}
/* Paginador de la cola: selector de tamaño (10/20/30) + navegación de páginas. */
.queue-pager {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  margin: 10px 0;
}
.queue-size { display: flex; align-items: center; gap: 6px; }
.queue-size-label { color: var(--muted); font-size: 0.78rem; }
.queue-type-filter { display: flex; align-items: center; gap: 6px; margin-right: 12px; }
.queue-type-select {
  padding: 4px 8px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text);
  font-size: 0.82rem;
  cursor: pointer;
}
.queue-type-select:hover { background: rgba(255, 255, 255, 0.05); }
.queue-size-btn {
  min-width: 34px;
  padding: 4px 8px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text);
  font-size: 0.82rem;
  cursor: pointer;
}
.queue-size-btn:hover { background: rgba(255, 255, 255, 0.05); }
.queue-size-btn.is-active {
  background: var(--primary-soft);
  border-color: var(--primary);
  color: var(--primary);
  font-weight: 700;
}
.queue-nav { display: flex; align-items: center; gap: 10px; }
.queue-nav-info { color: var(--muted); font-size: 0.8rem; font-variant-numeric: tabular-nums; }
.queue-nav-btn {
  padding: 4px 10px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text);
  font-size: 0.82rem;
  cursor: pointer;
}
.queue-nav-btn:hover:not(:disabled) { background: rgba(255, 255, 255, 0.05); }
.queue-nav-btn:disabled { opacity: 0.4; cursor: default; }
.queue-status { font-weight: 600; font-size: 0.82rem; white-space: nowrap; }
.queue-status-running { color: var(--primary); }
.queue-status-done { color: var(--muted); }
.queue-status-failed { color: var(--red); }
.queue-status-other { color: var(--yellow); }
.queue-status-reason {
  display: block;
  margin-top: 2px;
  font-size: 0.72rem;
  font-weight: 400;
  color: var(--red);
  opacity: 0.85;
  line-height: 1.25;
  max-width: 22ch;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  white-space: normal;
  cursor: help;
}
.queue-cell.queue-action { overflow: visible; display: flex; justify-content: flex-end; }
.queue-open {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 5px 11px;
  cursor: pointer;
  white-space: nowrap;
}
.queue-open:hover {
  background: var(--primary-soft);
  border-color: rgba(var(--primary-rgb), 0.45);
  color: var(--primary);
}

/* En móvil la tabla de la cola (11 columnas) se sale del viewport: cada job
   pasa a ser una tarjeta con el libro como título y el resto como filas
   "etiqueta · valor". */
@media (max-width: 760px) {
  .queue-table {
    border: none;
    background: none;
    overflow: visible;
  }
  .queue-head {
    display: none;
  }
  .queue-row {
    grid-template-columns: auto 1fr;
    gap: 5px 10px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--panel);
    padding: 12px 14px;
    margin-bottom: 8px;
    font-size: 0.86rem;
  }
  .queue-row:first-child { border-top: 1px solid var(--line); }
  .queue-num {
    grid-column: 1;
    text-align: left;
    padding: 0;
    font-weight: 700;
  }
  .queue-cell.queue-book {
    grid-column: 2;
    white-space: normal;
    overflow: visible;
    font-weight: 700;
    color: var(--text);
  }
  .queue-cell:not(.queue-book) {
    grid-column: 1 / -1;
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 4px 8px;
    white-space: normal;
    overflow: visible;
  }
  .queue-cell:not(.queue-book)::before {
    flex: none;
    min-width: 72px;
    color: var(--muted);
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
  }
  .queue-cell.queue-chapter::before { content: "Capítulo"; }
  .queue-cell.queue-node::before { content: "Recurso"; }
  .queue-cell.queue-type::before { content: "Tipo"; }
  .queue-cell.queue-engine::before { content: "Motor"; }
  .queue-cell.queue-user::before { content: "Usuario"; }
  .queue-cell.queue-state::before { content: "Estado"; }
  .queue-cell.queue-duration::before { content: "Duración"; }
  .queue-cell.queue-when::before { content: "Pedido"; }
  .queue-cell.queue-action {
    grid-column: 1 / -1;
    justify-content: stretch;
  }
  .queue-cell.queue-action::before { content: none; }
  .queue-open { width: 100%; }
}

/* Resalta el nodo al que se navega desde la cola ("Abrir ↗"). */
@keyframes node-flash-fade {
  0%   { background: rgba(var(--primary-rgb), 0.35); }
  100% { background: transparent; }
}
.matrix-row.node-flash {
  animation: node-flash-fade 2.2s ease-out;
  box-shadow: inset 3px 0 0 var(--primary);
}

/* --- Modo curso: estado vacío --- */
.course-empty {
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
}
.course-empty-title { margin: 0 0 6px; font-weight: 700; font-size: 16px; }

/* --- Modo curso: progreso + camino enriquecido --- */
.course-path-wrap { min-width: 0; }
.course-progress-head {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 4px 10px;
  margin-bottom: 14px;
}
.course-progress-label { color: var(--muted); font-size: 13px; }
.course-progress-count { color: var(--primary); font-weight: 800; }
.course-progress-bar {
  grid-column: 1 / -1;
  height: 8px;
  border-radius: 999px;
  background: var(--panel-strong);
  overflow: hidden;
}
.course-progress-bar > span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--primary), #7ef0a8);
  border-radius: 999px;
  transition: width .4s ease;
}
.course-path { position: relative; }
.course-path::before {
  content: "";
  position: absolute;
  left: 17px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--line);
}
.course-node { border-left: none; padding-left: 0; }
.course-node-head {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  background: transparent;
  border: 1px solid transparent;
  color: var(--text);
  padding: 10px;
  border-radius: 12px;
  cursor: pointer;
  text-align: left;
  transition: background .15s ease, border-color .15s ease, transform .1s ease;
}
.course-node-head:hover { background: var(--panel-strong); transform: translateX(2px); }
.course-node.is-selected > .course-node-head {
  background: var(--panel-strong);
  border-color: var(--primary);
}
.node-badge {
  position: relative;
  z-index: 1;
  flex: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 16px;
  background: var(--panel);
  border: 2px solid var(--line);
}
.course-node.node-completed .node-badge { border-color: var(--primary); background: var(--primary-soft); color: var(--primary); }
.course-node.is-current .node-badge { border-color: var(--yellow); box-shadow: 0 0 0 4px rgba(248, 193, 74, 0.12); }
.node-body { display: flex; flex-direction: column; gap: 5px; min-width: 0; flex: 1; }
.node-title { font-weight: 600; word-break: break-word; line-height: 1.3; }
.node-chips { display: flex; flex-wrap: wrap; gap: 5px; align-items: center; }
.course-chip {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-size: 11px;
  padding: 2px 7px;
  border-radius: 999px;
  background: var(--panel);
  border: 1px solid var(--line);
  color: var(--muted);
}

.course-chip.chip-completed { border-color: var(--primary); color: var(--primary); }
.course-chip.chip-needs_review { border-color: var(--red); color: var(--red); }
.course-chip.chip-opened { color: var(--text); }
.course-chip.chip-busy { border-color: var(--primary); color: var(--primary); }
.course-chip svg { width: 12px; height: 12px; }

.course-chip.chip-busy { cursor: pointer; }
.course-chip.chip-busy:hover { background: var(--primary-soft); }


/* --- Modo curso: jerarquía clara ------------------------------------------ */
.course-node.level-section .course-node-head { margin-left: 30px; width: calc(100% - 30px); }
.course-node.level-concept .course-node-head { margin-left: 60px; width: calc(100% - 60px); }
.course-node.level-section .node-badge { width: 30px; height: 30px; font-size: 13px; }
.course-node.level-concept .node-badge { width: 24px; height: 24px; font-size: 11px; }
.course-node.level-chapter .node-title { font-size: 1rem; font-weight: 800; }
.course-node.level-section .node-title { font-size: 0.95rem; font-weight: 700; }
.course-node.level-concept .node-title { font-size: 0.9rem; font-weight: 600; color: #e2e2e2; }
.node-level {
  color: var(--muted);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  line-height: 1;
  text-transform: uppercase;
}
.course-node.level-chapter .node-level { color: var(--primary); }
.course-node.level-section .node-level { color: #8fd8ff; }
.course-node.level-concept .node-level { color: #9fa8ff; }
.node-badge-section { border-color: rgba(143, 216, 255, 0.55); color: #8fd8ff; }
.node-badge-concept { border-color: rgba(159, 168, 255, 0.55); color: #9fa8ff; }
.course-node.level-section.node-completed .node-badge { border-color: rgba(143, 216, 255, 0.55); background: rgba(143, 216, 255, 0.12); color: #8fd8ff; }
.course-node.level-concept.node-completed .node-badge { border-color: rgba(159, 168, 255, 0.55); background: rgba(159, 168, 255, 0.12); color: #9fa8ff; }
.course-node.is-playing .node-badge { border-color: var(--primary); background: var(--primary-soft); color: var(--primary); }
.course-path::before { left: 18px; }

/* --- Modo curso: visto vs reproduciendo ----------------------------------- */
.course-activity.act-completed:not(.is-playing) {
  border-color: rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.035);
}
.course-activity.act-completed:not(.is-playing) .act-mark {
  color: #b8c0ba;
}
.course-activity.act-completed:not(.is-playing) .act-name {
  color: #d7d7d7;
}
.course-activity.act-completed:not(.is-playing) .act-status {
  color: #b8c0ba;
}
.course-activity.has-note:not(.act-completed):not(.is-playing) {
  border-color: rgba(var(--primary-rgb), 0.45);
}
.course-activity.is-playing {
  border-color: var(--primary);
  background: rgba(var(--primary-rgb), 0.18);
  box-shadow: inset 3px 0 0 var(--primary);
}
.course-activity.is-playing .act-mark,
.course-activity.is-playing .act-playing-tag {
  color: var(--primary);
}
.course-chip.chip-completed {
  border-color: rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.045);
  color: #b8c0ba;
}
.course-chip.chip-completed svg { opacity: 0.72; }

/* --- Overlay de logs en vivo --- */
.joblog-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 60;
  padding: 24px;
}
.joblog-dialog {
  width: min(960px, 96vw);
  max-height: 86vh;
  display: flex;
  flex-direction: column;
  background: #0c0c0c;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

/* Botón para saltar a la página real del libro */
.page-jump {
  margin-left: 8px;
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  color: inherit;
  cursor: pointer;
  white-space: nowrap;
}
.page-jump:hover { background: rgba(255, 255, 255, 0.12); }

/* Lector del PDF fuente con scroll continuo */
.bookpage-dialog { width: min(900px, 94vw); height: 92vh; }
.bookpage-controls { display: flex; align-items: center; gap: 6px; }
.bookpage-offset-label { font-size: 11px; }
.bookpage-offset { min-width: 28px; text-align: center; font-variant-numeric: tabular-nums; font-size: 12px; }
.bookpage-scroll {
  flex: 1;
  overflow-y: auto;
  background: #111;
  padding: 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.bookpage-slot {
  width: 100%;
  max-width: 820px;
  min-height: 1100px;
  display: flex;
  justify-content: center;
}
.bookpage-slot .slide-page-image { max-width: 100%; height: auto; align-self: flex-start; }
.joblog-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
}
.joblog-head h3 { margin: 0; font-size: 15px; }
.joblog-head-actions { display: flex; align-items: center; gap: 8px; }
.joblog-cancel { font-size: 12px; padding: 4px 10px; }
.joblog-status { font-size: 12px; font-weight: 700; }
.joblog-body {
  margin: 0;
  flex: 1;
  overflow: auto;
  padding: 14px 16px;
  font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  font-size: 12.5px;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
  color: #d6f5df;
  background: #070707;
}
.joblog-foot { margin: 0; padding: 10px 16px; border-top: 1px solid var(--line); font-size: 12px; }

/* --- Modal de generación: opciones de motor/modelo/effort --- */
.engine-grid {
  grid-template-columns: repeat(auto-fit, minmax(220px, 280px));
  justify-content: start;
  align-items: end;
}
.engine-options {
  grid-column: auto;
  display: contents;
}
.engine-options label { min-width: 0; }
.engine-note { margin: 4px 0 0; }

/* Opciones específicas del recurso (p. ej. infografía con codex/claude). */
.resource-options {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px 12px;
  margin: 4px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.resource-options legend {
  padding: 0 6px;
  color: var(--muted);
  font-size: 0.78rem;
}
.resource-options label {
  flex: 1 1 200px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  color: var(--muted);
  font-size: 0.85rem;
}
.resource-options input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #111;
  color: var(--text);
  padding: 8px 10px;
}
.resource-options .checkbox-row {
  flex: 1 1 100%;
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}
.resource-options .checkbox-row input { width: auto; flex: 0 0 auto; }
.resource-options .lib-field {
  flex: 1 1 100%;
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: var(--muted);
  font-size: 0.85rem;
}
.resource-options .lib-field[data-disabled] { opacity: 0.45; }
.resource-options .quiz-image-field {
  flex: 1 1 100%;
  color: var(--muted);
  font-size: 0.85rem;
  padding-left: 26px;
}
.resource-options .quiz-image-field[data-disabled] { opacity: 0.45; }
.resource-options .quiz-image-pct {
  display: flex;
  align-items: center;
  gap: 8px;
}
.resource-options .quiz-image-pct input { width: 72px; flex: 0 0 auto; }
.lib-group-title { color: var(--muted); }
.lib-checks {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 6px 14px;
}
.lib-check-row {
  display: flex;
  flex-direction: row;
  align-items: baseline;
  gap: 8px;
  cursor: pointer;
}
.lib-check-row input { width: auto; flex: 0 0 auto; }
.lib-name { color: var(--text); font-weight: 600; }
.lib-desc { color: var(--muted); font-size: 0.78rem; }


@media (max-width: 820px) {
  .topbar {
    position: relative;
    padding-right: 54px;
  }
  .profile-menu {
    position: absolute;
    top: 2px;
    right: 0;
  }
  .google-profile-panel {
    right: 0;
  }
  .profile-setting-row {
    grid-template-columns: 1fr;
  }
}

/* --- Libros: biblioteca estilo Netflix ------------------------------------ */
.libros-row {
  margin: 22px 0;
}

.libros-row-title {
  margin: 0 0 10px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
}

.libros-rail {
  display: flex;
  gap: 18px;
  overflow-x: auto;
  padding: 4px 2px 14px;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}

.libros-rail::-webkit-scrollbar {
  height: 6px;
}

.libros-rail::-webkit-scrollbar-track {
  background: transparent;
}

.libros-rail::-webkit-scrollbar-thumb {
  background: transparent;
  border-radius: 8px;
}

.libros-rail:hover::-webkit-scrollbar-thumb {
  background: var(--line);
}

.book-tile {
  flex: 0 0 auto;
  width: 150px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 0;
  border: none;
  background: none;
  color: inherit;
  text-align: left;
  cursor: pointer;
  scroll-snap-align: start;
}

.book-cover-wrap {
  position: relative;
  width: 150px;
  height: 210px;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.4);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.book-tile:hover .book-cover-wrap {
  transform: translateY(-4px) scale(1.03);
  box-shadow: 0 12px 26px rgba(0, 0, 0, 0.55);
}

.book-cover-fallback {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 5px;
  padding: 14px;
  overflow: hidden;
  background: linear-gradient(150deg, #3a1c71, #8f5cf6);
}

/* Franja de "lomo" a la izquierda para que parezca una portada de libro. */
.book-cover-fallback::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 8px;
  background: rgba(0, 0, 0, 0.28);
  box-shadow: inset -1px 0 0 rgba(255, 255, 255, 0.12);
}

.book-cover-initial {
  position: absolute;
  top: -14px;
  right: 2px;
  font-size: 6.5rem;
  font-weight: 800;
  line-height: 1;
  color: rgba(255, 255, 255, 0.14);
  pointer-events: none;
}

.book-cover-fallback-title {
  position: relative;
  font-size: 0.9rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.25;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.45);
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.book-cover-fallback-author {
  position: relative;
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.85);
  overflow-wrap: anywhere;
}

.book-cover {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: var(--panel);
}

.book-cover.cover-failed {
  display: none;
}

.book-tile-caption {
  display: flex;
  flex-direction: column;
  gap: 2px;
  width: 150px;
  min-width: 0;
}

.book-tile-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.2;
  overflow-wrap: anywhere;
  word-break: break-word;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.book-tile-author {
  font-size: 0.8rem;
  color: var(--muted);
  overflow-wrap: anywhere;
}

/* --- Modal: editar libro --------------------------------------------------- */
.book-edit-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.book-edit-field {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.book-edit-field > span {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
}

.book-edit-field input {
  padding: 9px 11px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--text);
  font-size: 0.92rem;
}

.book-edit-ai {
  display: grid;
  gap: 10px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.03);
}
.book-edit-ai-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--text);
  font-weight: 700;
}
.book-edit-ai .engine-grid {
  margin: 0;
}
.book-ai-run {
  width: 44px;
  height: 44px;
  border-radius: 999px;
  font-size: 1.15rem;
  font-weight: 800;
  flex: 0 0 auto;
}
.book-edit-status:empty {
  display: none;
}

.book-edit-danger {
  padding-top: 4px;
}

/* --- Tarjetas de capítulo: iconos de recursos y nota de quiz -------------- */
.chapter-resource-icons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.res-icon {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.82rem;
  color: var(--muted);
}

.res-icon svg {
  width: 16px;
  height: 16px;
}

.res-icon-count {
  font-weight: 600;
  color: var(--text);
}

.chapter-grade {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 700;
}

.course-play-btn {
  margin-left: auto;
  border: 1px solid var(--primary);
  background: var(--primary-soft, rgba(var(--primary-rgb), 0.16));
  color: var(--primary);
  font-weight: 700;
  border-radius: 999px;
  padding: 4px 12px;
  cursor: pointer;
  transition: filter .15s ease;
}
.course-play-btn:hover { filter: brightness(1.12); }

/* --- Feed (Reels/Shorts) --------------------------------------------------- */
.feed-view { padding: 0; }

.feed-stage {
  position: relative;
  height: calc(100vh - 118px);
  min-height: 420px;
  display: grid;
  place-items: center;
  background:
    radial-gradient(120% 90% at 50% 0%, #1c1c1c 0%, #0a0a0a 70%);
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
}

.feed-track {
  width: min(460px, 100%);
  height: 100%;
  overflow-y: scroll;
  scroll-snap-type: y mandatory;
  scrollbar-width: none;
  -ms-overflow-style: none;
  border-radius: 16px;
}
.feed-track::-webkit-scrollbar { width: 0; height: 0; }

.feed-card {
  position: relative;
  height: 100%;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  display: grid;
  place-items: center;
  background: #000;
  overflow: hidden;
}

.feed-surface {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  overflow: hidden;
}

.feed-media {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.feed-media-contain { object-fit: contain; background: #050505; }

/* Audio: sin video, mostramos un visual con disco + ecualizador animado. */
.feed-surface-audio {
  background: linear-gradient(160deg, #10241b 0%, #0a0a0a 60%, #1a1030 100%);
}
.feed-audio-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 26px;
}
.feed-audio-disc {
  width: 168px;
  height: 168px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  color: #06180f;
  background: radial-gradient(circle at 35% 30%, #47ffa1, var(--primary) 55%, #0f7b3c 100%);
  box-shadow: 0 0 0 10px rgba(var(--primary-rgb), 0.10), 0 20px 60px rgba(0, 0, 0, 0.55);
  animation: feedDiscSpin 8s linear infinite;
}
.feed-audio-disc span svg { width: 54px; height: 54px; }
.feed-card:not(.is-active) .feed-audio-disc { animation-play-state: paused; }
@keyframes feedDiscSpin { to { transform: rotate(360deg); } }

.feed-audio-bars {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 46px;
}
.feed-audio-bars i {
  width: 6px;
  height: 100%;
  border-radius: 3px;
  background: var(--primary);
  transform-origin: bottom;
  animation: feedBar 1.1s ease-in-out infinite;
}
.feed-audio-bars i:nth-child(2) { animation-delay: .15s; }
.feed-audio-bars i:nth-child(3) { animation-delay: .3s; }
.feed-audio-bars i:nth-child(4) { animation-delay: .45s; }
.feed-audio-bars i:nth-child(5) { animation-delay: .2s; }
.feed-audio-bars i:nth-child(6) { animation-delay: .35s; }
.feed-audio-bars i:nth-child(7) { animation-delay: .1s; }
.feed-card:not(.is-active) .feed-audio-bars i { animation-play-state: paused; }
@keyframes feedBar { 0%, 100% { transform: scaleY(0.28); } 50% { transform: scaleY(1); } }

.feed-meta {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 3;
  padding: 48px 18px 22px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: linear-gradient(0deg, rgba(0, 0, 0, 0.82) 0%, rgba(0, 0, 0, 0) 100%);
  pointer-events: none;
}
.feed-badge {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 11px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.16);
  font-size: 0.78rem;
  font-weight: 700;
}
.feed-badge svg { width: 15px; height: 15px; }
.feed-author {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}
.feed-engine-avatar {
  flex: none;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 999px;
  border: 2px solid rgba(255, 255, 255, 0.78);
  background: rgba(0, 0, 0, 0.62);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.42);
}
.feed-engine-avatar .engine-icon,
.feed-engine-avatar svg {
  width: 22px;
  height: 22px;
}
.feed-engine-fallback { font-size: 0.72rem; font-weight: 800; }
.feed-author-text { min-width: 0; }
.feed-title { margin: 0; font-size: 1.12rem; line-height: 1.25; }
.feed-context { margin: 0; color: var(--muted); font-size: 0.86rem; }

.feed-mute {
  position: absolute;
  top: 14px;
  right: 14px;
  z-index: 6;
  width: 44px;
  height: 44px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(0, 0, 0, 0.5);
  color: #fff;
  font-size: 1.1rem;
  cursor: pointer;
  backdrop-filter: blur(4px);
}
.feed-mute:hover { background: rgba(0, 0, 0, 0.72); }

.feed-progress-badge {
  display: none;
  position: absolute;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 6;
  min-width: 58px;
  background: rgba(0, 0, 0, 0.56);
  backdrop-filter: blur(8px);
}
.feed-progress-badge.is-complete {
  transform: translateX(-50%);
  animation: feedMediaCompletePop 0.7s cubic-bezier(.2, 1.6, .34, 1), mediaCompleteGlow 1.6s ease-in-out infinite alternate;
}

.feed-play-hint {
  position: absolute;
  z-index: 4;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 84px;
  height: 84px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  font-size: 2rem;
  color: #fff;
  background: rgba(0, 0, 0, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.22);
  pointer-events: none;
}

.feed-empty {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: center;
  justify-content: center;
  text-align: center;
  height: 100%;
  padding: 24px;
  color: var(--text);
}
.feed-empty .muted { color: var(--muted); }

/* Scrubber del Feed: aparece al pasar el mouse sobre la card (estilo Shorts). */
.feed-scrubber {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 5;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 10px 16px 12px;
  background: linear-gradient(0deg, rgba(0, 0, 0, 0.72) 0%, rgba(0, 0, 0, 0) 100%);
  opacity: 0;
  transform: translateY(6px);
  transition: opacity .16s ease, transform .16s ease;
  pointer-events: none;
}
.feed-card:hover .feed-scrubber,
.feed-scrubber:focus-within {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
/* En hover subimos la metadata para que no choque con la barra. */
.feed-card:hover .feed-meta { padding-bottom: 58px; transition: padding-bottom .16s ease; }

.feed-seek {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 5px;
  border-radius: 999px;
  cursor: pointer;
  background: linear-gradient(
    to right,
    var(--primary) 0%,
    var(--primary) var(--feed-progress, 0%),
    rgba(255, 255, 255, 0.32) var(--feed-progress, 0%),
    rgba(255, 255, 255, 0.32) 100%);
}
.feed-seek::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.35);
  cursor: pointer;
}
.feed-seek::-moz-range-thumb {
  width: 13px;
  height: 13px;
  border: 0;
  border-radius: 50%;
  background: #fff;
  cursor: pointer;
}
.feed-seek:disabled { opacity: 0.5; cursor: default; }

.feed-ctrl-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.feed-time {
  font-size: 0.74rem;
  color: rgba(255, 255, 255, 0.86);
  font-variant-numeric: tabular-nums;
}
.feed-fs {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  border: 0;
  background: transparent;
  color: #fff;
  font-size: 1.15rem;
  line-height: 1;
  cursor: pointer;
}
.feed-fs:hover { background: rgba(255, 255, 255, 0.18); }

/* Botón de pantalla completa propio de las infografías (no tienen scrubber).
   Se ancla arriba a la derecha, debajo del botón de mute global. */
.feed-fs-standalone {
  position: absolute;
  top: 164px;
  right: 14px;
  z-index: 6;
  width: 44px;
  height: 44px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
}
.feed-fs-standalone:hover { background: rgba(0, 0, 0, 0.72); }

/* Card en pantalla completa: fondo negro sólido y medio contenido centrado. */
.feed-card.is-fullscreen { background: #000; }
.feed-card.is-fullscreen .feed-media { width: 100%; height: 100%; }

/* Filtro de tags del Feed (arriba a la izquierda del escenario). */
.feed-filter {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 7;
}
.feed-filter-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 40px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(0, 0, 0, 0.5);
  color: #fff;
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  backdrop-filter: blur(4px);
}
.feed-filter-toggle:hover { background: rgba(0, 0, 0, 0.72); }
.feed-filter-toggle.has-filter {
  border-color: rgba(var(--primary-rgb), 0.6);
  color: var(--primary);
}
.feed-filter-panel {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  width: 240px;
  max-height: min(60vh, 420px);
  overflow-y: auto;
  padding: 12px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: #1b1b1b;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.6);
}
.feed-filter-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 8px;
}
.feed-filter-actions button {
  flex: 1;
  padding: 6px 8px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  font-size: 0.78rem;
  cursor: pointer;
}
.feed-filter-actions button:hover { background: var(--primary-soft); border-color: rgba(var(--primary-rgb), 0.45); }
.feed-filter-actions .feed-filter-apply {
  grid-column: 1 / -1;
  border-color: var(--primary);
  background: var(--primary);
  color: #06210f;
  font-weight: 800;
}
.feed-filter-actions .feed-filter-apply:hover { background: #26e06a; }
.feed-filter-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.feed-filter-item {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 7px 8px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.88rem;
}
.feed-filter-item:hover { background: rgba(255, 255, 255, 0.06); }
.feed-filter-item input { accent-color: var(--primary); width: 16px; height: 16px; }

/* Aviso cuando un recurso no se pudo cargar (en vez de quedar en negro). */
.feed-error {
  position: absolute;
  z-index: 4;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 18px 22px;
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.62);
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: #fff;
  text-align: center;
}
.feed-error-retry {
  padding: 7px 16px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  background: var(--primary-soft);
  color: var(--text);
  font-weight: 700;
  cursor: pointer;
}
.feed-error-retry:hover { background: rgba(var(--primary-rgb), 0.28); }

/* Indicador de descarga bajo demanda (pull de un recurso aún no local). */
.feed-loading {
  position: absolute;
  z-index: 4;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  backdrop-filter: blur(4px);
}
.feed-spinner {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.28);
  border-top-color: var(--primary, var(--primary));
  animation: spin 0.8s linear infinite;
}

/* Botón "Ir al capítulo" dentro de la card del feed. */
.feed-goto {
  align-self: flex-start;
  margin-top: 4px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid rgba(var(--primary-rgb), 0.55);
  background: rgba(var(--primary-rgb), 0.16);
  color: #fff;
  font-weight: 700;
  font-size: 0.82rem;
  cursor: pointer;
  pointer-events: auto;
  backdrop-filter: blur(3px);
}
.feed-goto:hover { background: rgba(var(--primary-rgb), 0.3); border-color: var(--primary); }

/* --- Nuevos controles media/feed/libros --- */
.book-tag-filters {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  margin: 8px 0 16px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.book-tag-filters::-webkit-scrollbar {
  display: none;
}
.book-tag-filter {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  color: var(--muted);
  padding: 7px 12px;
  cursor: pointer;
  flex-shrink: 0;
  white-space: nowrap;
}
.book-tag-filter.is-active,
.book-tag-filter:hover {
  border-color: rgba(var(--primary-rgb), 0.5);
  color: var(--primary);
  background: var(--primary-soft);
}
.media-controls-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 12px;
}
.overlay-media-progress,
.side-media-progress {
  flex: 0 0 auto;
}
.media-volume-control,
.feed-volume {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--muted);
  font-size: 12px;
}
.media-volume-control input,
.feed-volume input {
  width: 110px;
  accent-color: var(--primary);
}
.media-volume-control strong {
  min-width: 34px;
  color: var(--text);
  font-weight: 700;
}
.media-speed-control select {
  font-size: 12px;
  padding: 4px 6px;
  border-radius: 4px;
}
.media-mute-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  font-size: 1rem;
  cursor: pointer;
}
.media-mute-btn:hover { background: rgba(255, 255, 255, 0.14); }
.overlay-audio-player {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  width: min(420px, 100%);
  margin: 0 auto;
}

.resource-type-audio .overlay-panel {
  width: min(560px, 94vw);
  height: auto;
  min-height: 0;
  grid-template-rows: auto auto auto;
}
.resource-type-audio .overlay-header {
  padding: 10px 16px 9px;
}
.resource-type-audio .overlay-header .eyebrow {
  margin-bottom: 2px;
}
.resource-type-audio .overlay-header h2 {
  font-size: 1.35rem;
}
.resource-type-audio .overlay-controls {
  min-height: 38px;
  padding: 6px 16px;
}
.resource-type-audio .overlay-body {
  overflow: visible;
  padding: 10px 16px 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
}
.resource-type-audio .overlay-audio-player {
  width: 100%;
  gap: 0;
}
.resource-type-audio .overlay-audio-player .feed-audio-visual {
  display: none;
}
.resource-type-audio .overlay-audio-player .overlay-media {
  width: 100%;
  height: 38px;
}
.feed-audio-visual-compact {
  gap: 16px;
  transform: scale(0.72);
  transform-origin: center;
  margin: -20px 0;
}
.overlay-audio-player:not(.is-playing) .feed-audio-disc,
.overlay-audio-player:not(.is-playing) .feed-audio-bars i,
.feed-card-audio:not(.is-playing) .feed-audio-disc,
.feed-card-audio:not(.is-playing) .feed-audio-bars i {
  animation-play-state: paused;
}
.feed-autoplay {
  position: absolute;
  right: 16px;
  top: 64px;
  z-index: 6;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.46);
  color: var(--text);
  padding: 10px 12px;
  cursor: pointer;
  backdrop-filter: blur(10px);
}
.feed-reset {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.feed-autoplay.is-on,
.course-play-btn.is-on {
  border-color: rgba(var(--primary-rgb), 0.65);
  color: var(--primary);
  background: var(--primary-soft);
}
.feed-autoplay:hover { background: rgba(0, 0, 0, 0.72); }
.feed-reset {
  position: absolute;
  right: 16px;
  top: 114px;
  z-index: 6;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.46);
  color: var(--text);
  padding: 10px 12px;
  cursor: pointer;
  backdrop-filter: blur(10px);
}
.feed-reset:hover { background: rgba(0, 0, 0, 0.72); }
.feed-metrics-toggle {
  position: absolute;
  right: 16px;
  top: 164px;
  z-index: 6;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.46);
  color: var(--text);
  padding: 10px 12px;
  cursor: pointer;
  backdrop-filter: blur(10px);
  line-height: 1;
}
.feed-metrics-toggle:hover { background: rgba(0, 0, 0, 0.72); }
.feed-metrics-close {
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  width: 28px;
  height: 28px;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  flex: 0 0 auto;
}
.feed-metrics-close:hover { background: rgba(255, 255, 255, 0.16); }

.chapter-nav-button.danger {
  border-color: rgba(239, 68, 68, 0.55);
  color: #fecaca;
}

.chapter-nav-button.danger:not(:disabled):hover {
  background: rgba(239, 68, 68, 0.16);
  border-color: rgba(239, 68, 68, 0.8);
}


/* --- Métricas / progreso -------------------------------------------------- */
.metrics-panel {
  border: 1px solid var(--border);
  background: rgba(18, 18, 18, 0.86);
  border-radius: 8px;
  padding: 12px;
  margin: 12px 0;
}
.metrics-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(88px, 1fr));
  gap: 8px;
}
.metrics-card {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  background: var(--panel);
  padding: 8px 10px;
  min-width: 0;
}
.metrics-card span {
  color: var(--muted);
  font-size: 16px;
  line-height: 1;
}
.metrics-card strong {
  color: var(--text);
  font-size: 16px;
  line-height: 1.1;
}
.metrics-breakdown {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: 6px 10px;
  align-items: center;
  color: var(--muted);
  font-size: 12px;
  padding-top: 4px;
}
.metrics-breakdown span,
.metrics-breakdown strong,
.metrics-breakdown em {
  min-width: 0;
  font-style: normal;
}
.metrics-breakdown strong { color: var(--primary); }
.metrics-loading { color: var(--muted); font-size: 13px; }
.metrics-scope {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: 12px;
  text-transform: none;
  letter-spacing: 0;
}
.metrics-scope select {
  width: auto;
  min-width: 92px;
  padding: 5px 8px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: #111;
  color: var(--text);
}
.feed-metrics {
  position: absolute;
  left: 16px;
  right: 16px;
  top: 16px;
  z-index: 6;
  max-width: 520px;
  margin: 0 auto;
  pointer-events: auto;
}
.feed-metrics .metrics-grid { grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }
.feed-metrics .metrics-card { background: rgba(0, 0, 0, 0.48); }
@media (max-width: 760px) {
  .metrics-grid { grid-template-columns: repeat(4, 1fr); gap: 6px; }
  .metrics-breakdown { grid-template-columns: 1fr; }
  .feed-metrics {
    left: 8px;
    right: 8px;
    top: 8px;
  }

  /* En móvil los controles del feed pasan a íconos circulares pegados al borde
     derecho, para no tapar el título/contenido de las infografías. */
  .feed-btn-label { display: none; }
  .feed-mute {
    width: 38px;
    height: 38px;
    top: 12px;
    right: 12px;
    font-size: 1rem;
  }
  .feed-autoplay,
  .feed-reset,
  .feed-metrics-toggle {
    right: 12px;
    width: 38px;
    height: 38px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    font-size: 1rem;
  }
  .feed-autoplay { top: 58px; }
  .feed-reset { top: 104px; }
  .feed-metrics-toggle { top: 150px; }
}

/* --- Página de progreso e insignias -------------------------------------- */
.progress-page {
  display: flex;
  flex-direction: column;
  gap: 22px;
  max-width: 960px;
  margin: 0 auto;
  width: 100%;
}
.progress-page .metrics-grid { grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); }
.badges-section,
.progress-breakdown-section {
  border: 1px solid var(--border);
  background: rgba(18, 18, 18, 0.72);
  border-radius: 12px;
  padding: 16px;
}
.badges-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}
.badges-head h3,
.progress-breakdown-section h3 { margin: 0; }
.badges-count {
  color: var(--primary);
  font-weight: 700;
  font-size: 14px;
}
.badges-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 10px;
}
.badge-card {
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  padding: 12px;
  background: var(--panel);
}
.badge-card.is-locked { opacity: 0.55; }
.badge-card.is-earned {
  border-color: rgba(var(--primary-rgb), 0.5);
  background: var(--primary-soft);
}
.badge-icon {
  font-size: 28px;
  line-height: 1;
  filter: grayscale(1);
}
.badge-card.is-earned .badge-icon { filter: none; }
.badge-body { min-width: 0; display: flex; flex-direction: column; gap: 4px; }
.badge-body strong { font-size: 14px; color: var(--text); }
.badge-status { font-size: 12px; color: var(--muted); }
.badge-card.is-earned .badge-status { color: var(--primary); font-weight: 600; }
.badge-bar {
  display: block;
  height: 4px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  overflow: hidden;
}
.badge-bar > span {
  display: block;
  height: 100%;
  background: var(--primary);
  border-radius: 999px;
}
.progress-breakdown-section { margin-bottom: 24px; }
@media (max-width: 760px) {
  .badges-grid { grid-template-columns: 1fr; }
}


.tag-progress-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.tag-progress-row {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 4px;
  background: var(--panel);
  padding: 2px 6px;
  flex: 0 0 auto;
}
.tag-progress-icon {
  flex: 0 0 auto;
  font-size: 14px;
  line-height: 1;
}
.tag-progress-body {
  min-width: 0;
  display: flex;
  align-items: baseline;
  gap: 6px;
}
.tag-progress-meta {
  display: block;
  color: var(--muted);
  font-size: 11px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.tag-progress-row strong {
  color: var(--primary);
  font-size: 13px;
  line-height: 1;
  white-space: nowrap;
}
.primary-tag-metrics,
.book-metrics { margin-bottom: 16px; }
.books-metrics-slot .primary-tag-metrics {
  margin: 0;
  padding: 0;
}
.books-metrics-slot .metrics-head {
  margin-bottom: 8px;
}
.books-metrics-slot .tag-progress-list {
  display: flex;
  flex-wrap: wrap;
}
.books-metrics-slot .tag-progress-row {
  padding: 4px 8px;
}
@media (max-width: 980px) {
  .books-top {
    grid-template-columns: 1fr;
    max-width: 760px;
  }
}
@media (max-width: 640px) {
  .books-top {
    max-width: none;
    margin: 12px 0 22px;
    padding: 12px;
    border-radius: var(--radius);
  }
  .book-upload {
    grid-template-columns: 1fr;
    align-items: stretch;
  }
  .book-upload-metadata .engine-grid {
    grid-template-columns: 1fr;
  }
  .book-file,
  .book-title-input,
  .book-upload .topbar-action {
    width: 100%;
    min-height: 44px;
  }
}

/* --- Usuarios --------------------------------------------------------------- */
.user-avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  flex: 0 0 auto;
}
.user-avatar.user-avatar-lg { width: 40px; height: 40px; font-size: 1.05rem; }

.user-group { margin-bottom: 26px; }
.user-group-title {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin: 0 0 10px;
}
.user-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(320px, 100%), 1fr));
  gap: 12px;
}
.user-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
}
.user-card.is-default { border-color: var(--primary); }
.user-card-head { display: flex; align-items: flex-start; gap: 10px; }
.user-card-id { flex: 1 1 auto; min-width: 0; display: flex; flex-direction: column; gap: 6px; }
.user-nickname, .user-email {
  background: var(--panel-strong);
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--text);
  padding: 6px 8px;
  font-size: 0.9rem;
  width: 100%;
}
.user-nickname { font-weight: 700; }
.user-email { color: var(--muted); font-size: 0.82rem; }
.user-badge {
  font-size: 0.68rem;
  padding: 2px 6px;
  border-radius: 999px;
  align-self: flex-start;
}
.user-badge-warn { background: rgba(241, 93, 93, 0.16); color: var(--red); }
.user-badge-ok { background: rgba(var(--primary-rgb), 0.14); color: var(--primary); }
.user-account-details {
  display: grid;
  gap: 4px;
  margin: 12px 0 0;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.16);
}
.user-account-row {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
  font-size: 0.76rem;
}
.user-account-row dt {
  color: var(--muted);
}
.user-account-row dd {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  margin: 0;
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.user-account-row dd span {
  min-width: 0;
  overflow-wrap: anywhere;
}
.user-copy-path {
  flex: none;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel-strong);
  color: var(--text);
  padding: 3px 7px;
  font-family: inherit;
  font-size: 0.68rem;
  cursor: pointer;
}
.user-copy-path:hover { border-color: var(--primary); color: var(--primary); }
.user-card-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}
.user-color-label {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.78rem;
  color: var(--muted);
}
.user-color { width: 26px; height: 22px; border: none; background: none; padding: 0; cursor: pointer; }
.user-stat { font-size: 0.78rem; color: var(--muted); }
.user-default-btn {
  margin-left: auto;
  background: var(--panel-strong);
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--text);
  padding: 5px 10px;
  font-size: 0.8rem;
  cursor: pointer;
}
.user-default-btn:hover:not(:disabled) { border-color: var(--primary); }
.user-default-btn.is-default { color: var(--primary); border-color: var(--primary); cursor: default; }

.profile-manage-link {
  display: block;
  margin-top: 10px;
  font-size: 0.82rem;
  color: var(--primary);
  text-decoration: none;
}
.profile-manage-link:hover { text-decoration: underline; }
.settings-people-link {
  margin-top: 10px;
  display: inline-flex;
}

.profile-settings-links {
  display: grid;
  gap: 8px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  margin-top: 12px;
}

.profile-settings-link {
  display: flex;
  align-items: center;
  gap: 12px;
  border-radius: 18px;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.045);
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.92rem;
  transition: background 0.15s ease, border-color 0.15s ease;
  border: 1px solid transparent;
}

.profile-settings-link:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--line);
}

.profile-settings-link-icon {
  font-size: 1.1rem;
  line-height: 1;
}

.profile-settings-link-text {
  flex: 1;
}

.profile-settings-link::after {
  content: "→";
  color: var(--primary);
  font-size: 0.9rem;
}

.engine-user select { width: 100%; }

/* --- Chat sobre un recurso -------------------------------------------------- */
/* Un mismo .chat-panel se monta como drawer lateral (curso) o dentro de un
   .chat-modal (feed). Flex column: cabecera / settings / cuerpo (flex-1) / input. */
.chat-panel {
  display: flex;
  flex-direction: column;
  min-height: 0;
  max-height: calc(100dvh - 24px);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
}
.chat-head {
  flex-shrink: 0;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}
.chat-head-main { min-width: 0; }
.chat-eyebrow {
  display: block;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--primary);
}
.chat-title {
  margin: 2px 0 0;
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
}
.chat-head-actions { display: flex; gap: 6px; flex: none; }
.chat-settings-toggle,
.chat-size-toggle,
.chat-delete {
  width: 32px; height: 32px;
  display: grid; place-items: center;
  border: 1px solid transparent; border-radius: 10px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--muted); font-size: 1rem; cursor: pointer;
}
.chat-settings-toggle:hover,
.chat-size-toggle:hover,
.chat-delete:hover { color: var(--text); }
.chat-delete:hover { border-color: var(--red); color: var(--red); }
.chat-delete:disabled { opacity: 0.45; cursor: default; }
.chat-size-toggle { display: none; }
.chat-settings {
  flex-shrink: 0;
  max-height: min(260px, 36dvh);
  overflow-y: auto;
  padding: 12px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(255, 255, 255, 0.02);
  transition: max-height 0.25s ease, padding 0.25s ease, border-bottom-width 0.25s ease;
}
.chat-settings.is-collapsed {
  max-height: 0;
  padding-top: 0;
  padding-bottom: 0;
  border-bottom-width: 0;
  overflow: hidden;
}
.chat-settings .generation-grid { margin: 0; }

.chat-body {
  flex: 1 1 0;
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.chat-empty { margin: auto 0; text-align: center; }
.chat-msg { display: flex; flex-direction: column; gap: 3px; max-width: 88%; }
.chat-msg-user { align-self: flex-end; align-items: flex-end; }
.chat-msg-assistant { align-self: flex-start; align-items: flex-start; }
.chat-msg-who {
  font-size: 0.66rem; font-weight: 700; letter-spacing: 0.04em;
  text-transform: uppercase; color: var(--muted);
}
.chat-msg-text {
  padding: 9px 13px; border-radius: 14px; line-height: 1.5;
  white-space: pre-wrap; word-break: break-word; font-size: 0.94rem;
}
.chat-msg-user .chat-msg-text {
  background: var(--primary); color: #06210f; border-bottom-right-radius: 4px;
}
.chat-msg-assistant .chat-msg-text {
  background: rgba(255, 255, 255, 0.06); color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.06); border-bottom-left-radius: 4px;
}
.chat-msg-text > :first-child { margin-top: 0; }
.chat-msg-text > :last-child { margin-bottom: 0; }
.chat-msg-text p { margin: 0.45em 0; }
.chat-msg-text ul, .chat-msg-text ol { margin: 0.45em 0; padding-left: 1.25rem; }
.chat-msg-text blockquote {
  margin: 0.55em 0; padding-left: 0.8rem; border-left: 3px solid rgba(255, 255, 255, 0.22);
  color: var(--muted);
}
.chat-msg-text code {
  padding: 0.08rem 0.28rem; border-radius: 4px; background: rgba(0, 0, 0, 0.24);
  font-size: 0.9em;
}
.chat-msg-text pre {
  margin: 0.55em 0; padding: 0.65rem; border-radius: 8px; overflow-x: auto;
  background: rgba(0, 0, 0, 0.26); white-space: pre;
}
.chat-msg-text pre code { padding: 0; background: transparent; }
.chat-msg-text table {
  border-collapse: collapse; width: 100%; margin: 0.55em 0; font-size: 0.88rem;
}
.chat-msg-text th, .chat-msg-text td {
  border: 1px solid rgba(255, 255, 255, 0.14); padding: 0.35rem 0.45rem; text-align: left;
}
.chat-thinking { flex-direction: row; align-items: center; gap: 8px; color: var(--muted); }

.chat-input {
  flex-shrink: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  padding: 10px 12px; display: flex; flex-direction: column; gap: 8px;
  background: rgba(255, 255, 255, 0.02);
}
.chat-suggest-row { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.chat-length {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-left: auto;
  font-size: 0.72rem;
  color: var(--muted);
}
.chat-length select {
  font: inherit;
  font-size: 0.72rem;
  color: var(--text);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 2px 6px;
  cursor: pointer;
}
.chat-suggest,
.chat-settings-inline-toggle {
  border: 1px solid var(--line); border-radius: 999px;
  background: transparent; color: var(--muted);
  font-size: 0.8rem; padding: 4px 12px; cursor: pointer;
}
.chat-settings-inline-toggle {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.chat-suggest:hover,
.chat-settings-inline-toggle:hover,
.chat-settings-inline-toggle[aria-expanded="true"] { color: var(--text); border-color: var(--primary); }
.chat-input-row { display: flex; gap: 8px; align-items: flex-end; }
.chat-input textarea {
  flex: 1; resize: none; min-height: 40px; max-height: 160px;
  padding: 9px 12px; border-radius: 12px;
  border: 1px solid var(--line); background: var(--bg); color: var(--text);
  font: inherit; font-size: 0.94rem;
}
.chat-send {
  flex: none; padding: 9px 18px; border-radius: 12px; border: none;
  background: var(--primary); color: #06210f; font-weight: 700; cursor: pointer;
}
.chat-send:disabled { opacity: 0.5; cursor: default; }

/* Montura DRAWER (modo curso): panel fijo a la derecha, lado a lado. */
.chat-drawer {
  position: fixed;
  top: 0; right: 0; bottom: 0;
  width: min(420px, 92vw);
  z-index: 70;
  border-radius: 0;
  border-left: 1px solid var(--line);
  box-shadow: -24px 0 60px -30px rgba(0, 0, 0, 0.8);
  animation: chat-slide 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);
}
@keyframes chat-slide { from { transform: translateX(24px); opacity: 0; } }
/* Deja sitio al drawer para que no tape el contenido del curso. */
body.with-chat-drawer .app-shell { padding-right: min(420px, 92vw); }

/* Montura FLOTANTE (feed / modo play): panel compacto, SIN backdrop, para
   seguir viendo e interactuando con el recurso mientras se pregunta.
   Escritorio: tarjeta abajo-derecha. Móvil: bottom-sheet. */
.chat-float {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: min(400px, calc(100vw - 32px));
  height: min(560px, 72vh);
  z-index: 90;
  border-radius: 16px;
  box-shadow: 0 24px 70px -20px rgba(0, 0, 0, 0.85);
  animation: chat-pop 0.18s cubic-bezier(0.2, 0.8, 0.2, 1);
}
@keyframes chat-pop { from { transform: translateY(16px) scale(0.98); opacity: 0; } }

@media (max-width: 640px) {
  .chat-float {
    right: 0; left: 0; bottom: 0;
    width: 100%;
    height: min(72dvh, 640px);
    max-height: calc(100dvh - 18px);
    border-radius: 18px 18px 0 0;
  }
  .chat-float.is-expanded { height: min(90dvh, 760px); }
  .chat-float .chat-size-toggle { display: grid; }
  .chat-float .chat-head { padding: 10px 14px; }
  .chat-float .chat-body { padding: 12px 14px; }
  .chat-float .chat-input { padding: 8px 10px; }
  .chat-float .chat-input textarea { min-height: 38px; max-height: 90px; }
  .chat-float .chat-send { padding: 9px 16px; }
}

/* Botón de chat en el feed. OJO: .feed-meta tiene pointer-events:none para que
   el tap en la card haga play/pause; los botones interactivos deben re-activar
   pointer-events (igual que .feed-goto), o el clic cae en el media y da play. */
.feed-actions { display: flex; flex-wrap: wrap; gap: 8px; pointer-events: none; }
.feed-chat {
  display: inline-flex; align-items: center; gap: 6px;
  border: 1px solid rgba(255, 255, 255, 0.18); border-radius: 999px;
  background: rgba(0, 0, 0, 0.35); color: #fff;
  font-size: 0.82rem; padding: 6px 14px; cursor: pointer;
  backdrop-filter: blur(4px);
  pointer-events: auto;
  position: relative;
  z-index: 3;
}
.feed-chat:hover { border-color: var(--primary); }

@media (max-width: 640px) {
  .chat-drawer { width: 100vw; }
  body.with-chat-drawer .app-shell { padding-right: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .chat-drawer, .chat-float { animation: none; }
}

/* --- Mobile Optimizations & S26 Ultra rendering fixes --- */
@media (max-width: 820px) {
  /* Prevent nested scroll trap in feed/audio playback views by locking body to viewport */
  html,
  body {
    height: 100%;
    overflow: hidden;
  }

  .app-shell {
    height: 100%;
    width: 100%;
    max-width: 100vw;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
  }

  /* Topbar en móvil: rejilla estable de dos filas. Antes el nav competía por
     el ancho con el título (flex) y en el feed se recortaba/desaparecía o
     saltaba de posición al navegar/refrescar. Ahora el nav tiene su propia
     fila a ancho completo y siempre es visible sea cual sea la sección. */
  .topbar {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas: "nav profile";
    column-gap: 12px;
    align-items: center;
    padding: 8px 12px;
    margin-bottom: 0;
    min-height: 0;
    flex-shrink: 0;
    border-bottom: 1px solid var(--line);
    background: rgba(18, 18, 18, 0.95);
    backdrop-filter: blur(10px);
    z-index: 10;
  }
  .profile-menu {
    grid-area: profile;
    position: static;
    top: auto;
    right: auto;
    margin-left: 0;
  }
  .section-switch {
    grid-area: nav;
    width: 100%;
    max-width: 100%;
    min-width: 0;
  }

  /* Cabecera de detalle de libro en móvil: título con botón atrás compacto en
     una fila, y la fila de acciones con "Continuar" flexible + íconos. */
  .book-detail-head {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }
  .book-head-left {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
    max-width: 100%;
  }
  .book-head-left h2 {
    margin: 0;
    font-size: 1.2rem;
    min-width: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .book-detail-tools {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    min-width: 0;
    max-width: 100%;
  }
  .book-detail-tools #continueBookButton {
    flex: 1 1 auto;
    justify-content: center;
    min-width: 0;
  }
  .book-detail-tools .chapter-nav-button.icon-only {
    flex: 0 0 auto;
    width: 44px;
  }

  /* Contenido de Libros con un respiro lateral en móvil (el app-shell no tiene
     padding para dejar el feed a sangre completa). */
  #booksView {
    padding: 10px 12px 16px;
    min-width: 0;
    max-width: 100%;
  }

  main {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    display: flex;
    flex-direction: column;
    max-width: 100%;
  }

  /* Make feed stage fill the whole content area natively */
  .feed-view {
    flex: 1;
    display: flex; 
    flex-direction: column;
    height: 100%;
    padding: 0;
  }

  .feed-stage {
    flex: 1;
    height: 100%;
    border: none;
    border-radius: 0;
  }

  /* Feed scrubber always visible on mobile since there is no hover */
  .feed-scrubber {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
    background: linear-gradient(0deg, rgba(0, 0, 0, 0.9) 0%, rgba(0, 0, 0, 0.4) 70%, rgba(0, 0, 0, 0) 100%);
    padding-bottom: calc(12px + env(safe-area-inset-bottom, 0px));
  }

  .feed-card:hover .feed-meta,
  .feed-meta {
    padding-bottom: calc(64px + env(safe-area-inset-bottom, 0px)) !important;
  }

  /* Full screen native resource overlay on mobile */
  .resource-overlay {
    padding: 0 !important;
    background: #000 !important;
  }

  .overlay-panel {
    width: 100vw !important;
    height: 100% !important;
    max-width: 100vw !important;
    max-height: 100% !important;
    border: 0 !important;
    border-radius: 0 !important;
    background: #0a0a0a !important;
  }

  .resource-type-audio .overlay-panel {
    width: 100vw !important;
    height: 100% !important;
    max-width: 100vw !important;
    max-height: 100% !important;
  }

  .overlay-header {
    padding-top: calc(12px + env(safe-area-inset-top, 0px)) !important;
    padding-left: calc(12px + env(safe-area-inset-left, 0px)) !important;
    padding-right: calc(12px + env(safe-area-inset-right, 0px)) !important;
    background: #121212 !important;
  }

  .overlay-actions {
    flex-shrink: 0 !important;
    gap: 6px !important;
  }

  .overlay-actions .icon-action {
    width: 32px !important;
    height: 32px !important;
    font-size: 0.9rem !important;
  }

  .overlay-body {
    padding-bottom: env(safe-area-inset-bottom, 0px) !important;
  }
}

/* --- Sección Crear + asistente de creación de cursos (Fase 2) ------------- */
.create-modes {
  display: grid;
  grid-template-columns: minmax(260px, 360px) 1fr;
  gap: 18px;
  align-items: start;
}
@media (max-width: 860px) {
  .create-modes { grid-template-columns: 1fr; }
}
.create-card {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
  padding: 16px;
}
.create-card-title { margin: 0 0 4px; font-size: 1rem; }
.create-card-sub { margin: 0 0 12px; font-size: 0.85rem; }

.course-builder { min-height: 320px; }
.course-new-btn,
.course-back {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.06);
  color: inherit;
  padding: 9px 16px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.course-new-btn:hover, .course-back:hover { background: rgba(255, 255, 255, 0.12); }
.course-draft-list { list-style: none; margin: 14px 0 0; padding: 0; display: grid; gap: 8px; }
.course-draft-item { display: flex; gap: 8px; align-items: stretch; }
.course-draft-open {
  flex: 1;
  text-align: left;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.03);
  color: inherit;
  padding: 10px 12px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.course-draft-open:hover { background: rgba(255, 255, 255, 0.07); }
.course-draft-title { font-weight: 600; }
.course-draft-meta { font-size: 0.78rem; color: var(--muted); }
.course-draft-del {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  padding: 0 12px;
}
.course-draft-del:hover { color: var(--red); border-color: rgba(241, 93, 93, 0.4); }

.course-builder-head { display: flex; gap: 10px; align-items: center; margin-bottom: 12px; }
.course-title-input {
  flex: 1;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
  color: inherit;
  padding: 9px 12px;
  font: inherit;
}
.course-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  align-items: stretch;
}
@media (max-width: 780px) {
  .course-split { grid-template-columns: 1fr; }
}
.course-chat, .course-prompt {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel-strong);
  display: flex;
  flex-direction: column;
  min-height: 420px;
}
.course-chat-body {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
  max-height: 460px;
}
.course-empty { padding: 8px; }
.course-settings { padding: 0 12px; }
.course-settings.is-collapsed { display: none; }
.course-chat-input { border-top: 1px solid var(--line); padding: 10px 12px; }
.course-chat-row { display: flex; gap: 8px; align-items: flex-end; margin-top: 6px; }
.course-chat-row:first-child { margin-top: 0; }
.course-settings-toggle {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.05);
  color: inherit;
  padding: 5px 10px;
  font-size: 0.82rem;
  cursor: pointer;
}
#courseChatText {
  flex: 1;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
  color: inherit;
  padding: 9px 12px;
  font: inherit;
  resize: vertical;
}
.course-prompt-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px;
  border-bottom: 1px solid var(--line);
}
.course-prompt-eyebrow {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.course-prompt-save {
  border: 1px solid var(--primary);
  border-radius: 10px;
  background: var(--primary-soft);
  color: inherit;
  padding: 6px 14px;
  font-weight: 600;
  cursor: pointer;
}
.course-prompt-text {
  flex: 1;
  border: 0;
  background: transparent;
  color: inherit;
  padding: 12px;
  font: inherit;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.85rem;
  resize: none;
  min-height: 260px;
}
.course-prompt-hint { padding: 0 12px 12px; font-size: 0.78rem; }

/* --- Ejecutar borrador (Fase 3) ---------------------------------------- */
.course-exec { padding: 0 12px 12px; }
.course-exec-btn {
  width: 100%;
  border: 1px solid var(--primary);
  border-radius: 12px;
  background: var(--primary-soft);
  color: inherit;
  padding: 11px 14px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}
.course-exec-btn:hover:not(:disabled) { filter: brightness(1.15); }
.course-exec-btn:disabled { opacity: 0.6; cursor: default; }
.course-open-book {
  width: 100%;
  margin-top: 8px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.06);
  color: inherit;
  padding: 9px 14px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.course-sections {
  margin: 10px 0 4px;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 8px 12px 10px;
}
.course-sections legend {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--muted);
  padding: 0 4px;
}
.course-sections .radio-row {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.86rem;
  padding: 3px 0;
  cursor: pointer;
}
.course-sections .radio-row input[type="radio"] { width: auto; flex: 0 0 auto; margin: 0; }
.course-sections .engine-select { margin: 0 4px; padding: 2px 6px; }
.course-sections .engine-select:disabled { opacity: 0.45; }
.course-exec-log {
  margin-top: 10px;
  max-height: 220px;
  overflow-y: auto;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #0c0c0c;
  color: #cfcfcf;
  padding: 10px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.78rem;
  white-space: pre-wrap;
  word-break: break-word;
}

/* --- Asistente conversacional de secciones (overlay, Fase 2 Req 1) ------ */
.sb-overlay {
  position: fixed;
  inset: 0;
  z-index: 1200;
  background: rgba(0, 0, 0, 0.62);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.sb-dialog {
  width: min(1040px, 100%);
  max-height: 92vh;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
  overflow: hidden;
}
.sb-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
}
.sb-eyebrow, .course-prompt-eyebrow {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.sb-titlewrap h3 { margin: 2px 0; font-size: 1.05rem; }
.sb-pages { font-size: 0.8rem; }
.sb-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  padding: 14px;
  overflow: hidden;
  min-height: 0;
}
@media (max-width: 820px) {
  .sb-split { grid-template-columns: 1fr; overflow-y: auto; }
}
.sb-chat, .sb-canvas {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel-strong);
  display: flex;
  flex-direction: column;
  min-height: 380px;
  min-width: 0;
}
.sb-chat-body { flex: 1; overflow-y: auto; padding: 12px; max-height: 60vh; }
.sb-empty { padding: 8px; }
.sb-settings { padding: 0 12px; }
.sb-settings.is-collapsed { display: none; }
.sb-chat-input { border-top: 1px solid var(--line); padding: 10px 12px; }
.sb-chat-row { display: flex; gap: 8px; align-items: flex-end; margin-top: 6px; }
.sb-chat-row:first-child { margin-top: 0; }
#sbChatText {
  flex: 1;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  color: inherit;
  padding: 8px 10px;
  font: inherit;
}
.sb-canvas-head { padding: 12px 12px 6px; }
.sb-canvas-text {
  flex: 1;
  margin: 0 12px;
  resize: vertical;
  min-height: 200px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  color: inherit;
  padding: 10px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.82rem;
  line-height: 1.5;
}
.sb-actions { padding: 10px 12px 12px; }
.sb-actions .course-exec-btn { margin-top: 0; }
.sb-reset {
  margin-top: 8px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: transparent;
  color: var(--muted);
  padding: 5px 10px;
  font-size: 0.8rem;
  cursor: pointer;
}
.sb-log {
  margin-top: 10px;
  max-height: 140px;
  overflow-y: auto;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #0c0c0c;
  color: #cfcfcf;
  padding: 10px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.78rem;
  white-space: pre-wrap;
  word-break: break-word;
}

/* --- Profundizaciones (deep-dive → PDF) (Fase 4) ----------------------- */
.deepen-btn { margin-left: 6px; }
.deepen-modal-intro { margin-bottom: 10px; }
.deepen-list { margin-top: 10px; border-top: 1px solid var(--line); padding-top: 8px; }
.deepen-list-head { font-size: 0.8rem; color: var(--muted); margin-bottom: 6px; font-weight: 700; }
.deepen-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  padding: 5px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.deepen-item-name { font-size: 0.85rem; }
.deepen-item-actions { display: flex; gap: 6px; }
.deepen-del { color: var(--red); }
.deepen-toggle-card .deepen-toggle-row {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 0.88rem;
  cursor: pointer;
}
.deepen-toggle-card input[type="checkbox"] { margin-top: 3px; }

/* Sugerencias de puntos a profundizar (botón "Sugerir/Regenerar" + checkboxes) */
.deepen-suggest {
  margin: 12px 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 12px;
}
.deepen-suggest-head {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.deepen-suggest-btn { flex: 0 0 auto; }
.deepen-suggest-btn[disabled] { opacity: 0.6; cursor: progress; }
.deepen-suggest-count { font-size: 0.8rem; }
.deepen-suggest-hint { font-size: 0.78rem; margin: 6px 0 0; }
.deepen-suggest-list { margin-top: 10px; }
.deepen-suggest-list:empty { margin: 0; }
.deepen-suggest-row {
  align-items: flex-start;
  padding: 4px 0;
}
.deepen-suggest-row input { margin-top: 3px; }
.deepen-suggest-text { font-weight: 500; font-size: 0.86rem; line-height: 1.35; }

/* Responsive del modal de profundización (móvil): una columna cómoda, botones a
   ancho completo y targets grandes. El modal genérico no tenía @media propio. */
@media (max-width: 820px) {
  .deepen-suggest-list { grid-template-columns: 1fr; }
  .deepen-suggest-head { flex-direction: column; align-items: stretch; }
  .deepen-suggest-btn { width: 100%; padding: 10px 12px; }
  .deepen-suggest-row { padding: 8px 0; }
  .deepen-suggest-row input { width: 20px; height: 20px; }
  .deepen-item { flex-wrap: wrap; }
  .deepen-item-actions .mini-gen { padding: 8px 10px; }
  .generation-actions { flex-wrap: wrap; }
  .generation-actions .topbar-action,
  .generation-actions .chapter-nav-button { flex: 1 1 auto; }
}

/* --- Autenticación de la app (Fase 1) ------------------------------------- */
.auth-view {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background:
    radial-gradient(circle at top left, rgba(var(--primary-rgb), 0.14), transparent 30rem),
    linear-gradient(180deg, #171717 0%, var(--bg) 30rem);
}
.auth-view.hidden { display: none; }
.auth-card {
  width: 100%;
  max-width: 380px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 32px 26px 26px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
}
.auth-brand {
  margin: 0;
  font-size: 30px;
  letter-spacing: 0.02em;
  color: var(--text);
  text-align: center;
}
.auth-tagline {
  margin: 4px 0 22px;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
}
.auth-tabs {
  display: flex;
  gap: 6px;
  padding: 4px;
  margin-bottom: 20px;
  background: var(--panel-strong);
  border-radius: 10px;
}
.auth-tab {
  flex: 1 1 0;
  padding: 9px 10px;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.auth-tab.is-active {
  background: rgba(var(--primary-rgb), 0.16);
  color: var(--text);
}
.auth-form { display: flex; flex-direction: column; gap: 14px; }
.auth-field { display: flex; flex-direction: column; gap: 6px; }
.auth-field > span { font-size: 12px; color: var(--muted); }
.auth-field input {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--panel-strong);
  color: var(--text);
  font-size: 15px;
}
.auth-field input:focus {
  outline: none;
  border-color: rgba(var(--primary-rgb), 0.55);
}
.auth-submit {
  margin-top: 4px;
  padding: 12px;
  border: 0;
  border-radius: 9px;
  background: var(--primary);
  color: #000;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
}
.auth-submit:disabled { opacity: 0.6; cursor: default; }
.auth-error {
  margin: 2px 0 0;
  color: var(--red);
  font-size: 13px;
  text-align: center;
}

.profile-app-account {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 12px;
  margin-bottom: 8px;
  background: var(--panel-strong);
  border-radius: 10px;
}
.profile-app-email {
  font-size: 13px;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.profile-logout {
  flex: 0 0 auto;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
}
.profile-logout:hover { color: var(--text); border-color: rgba(var(--primary-rgb), 0.4); }

/* --- Workers (Fase C epic AWS/PC) ------------------------------------------ */
/* Todo con tokens de tema (var(--bg/panel/line/text/muted/primary)); sin
   colores fijos, así funciona en cualquier tema (claro u oscuro). */
.worker-add-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 16px;
  margin: 12px 0 20px;
}
.worker-add-form {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: flex-end;
}
.worker-field {
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: 0.8rem;
  color: var(--muted);
}
.worker-field input,
.worker-field select {
  min-width: 200px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel-strong);
  color: var(--text);
  padding: 8px 10px;
  font-family: inherit;
  font-size: 0.9rem;
}
.worker-field input:focus,
.worker-field select:focus {
  outline: none;
  border-color: rgba(var(--primary-rgb), 0.5);
}
.worker-add-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}
.worker-btn-ghost {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  padding: 8px 14px;
  font-size: 0.85rem;
  cursor: pointer;
}
.worker-btn-ghost:hover { color: var(--text); border-color: rgba(var(--primary-rgb), 0.4); }

.worker-add-result { margin-top: 14px; }
.worker-token-box {
  border: 1px solid rgba(var(--primary-rgb), 0.28);
  background: rgba(var(--primary-rgb), 0.06);
  border-radius: var(--radius);
  padding: 14px;
}
.worker-token-warn { margin: 0 0 10px; font-size: 0.85rem; color: var(--text); }
.worker-token-label {
  display: block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin: 10px 0 4px;
}
.worker-token-row {
  display: flex;
  gap: 8px;
  align-items: center;
}
.worker-token-value {
  flex: 1 1 auto;
  min-width: 0;
  overflow-x: auto;
  white-space: nowrap;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel-strong);
  color: var(--text);
  padding: 8px 10px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.8rem;
}
.worker-token-hint { margin: 10px 0 0; font-size: 0.78rem; }

.workers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
}
.worker-card {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 14px 16px;
}
.worker-card-main { min-width: 0; flex: 1 1 auto; }
.worker-card-head {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.worker-kind { font-size: 1.1rem; line-height: 1; }
.worker-name {
  margin: 0;
  font-size: 1rem;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
}
.worker-status {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--muted);
}
.worker-dot {
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: var(--muted);
}
.worker-status.is-online {
  color: var(--primary);
  border-color: rgba(var(--primary-rgb), 0.5);
}
.worker-status.is-online .worker-dot {
  background: var(--primary);
  box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.18);
}
.worker-status.is-offline { opacity: 0.85; }
.worker-meta {
  margin: 12px 0 0;
  display: grid;
  gap: 6px;
}
.worker-meta > div {
  display: flex;
  gap: 8px;
  font-size: 0.8rem;
}
.worker-meta dt {
  flex: 0 0 92px;
  color: var(--muted);
  margin: 0;
}
.worker-meta dd {
  margin: 0;
  color: var(--text);
  min-width: 0;
  overflow-wrap: anywhere;
}
.worker-card-actions { flex: none; }
.overview-steps {
  grid-column: 1 / -1;
  border: 1px solid var(--line, #d8dee6);
  border-radius: 8px;
  padding: 12px;
  display: grid;
  gap: 10px;
}
.overview-steps h4 {
  margin: 0;
  font-size: 0.95rem;
}
.overview-step-row {
  display: grid;
  grid-template-columns: minmax(170px, 0.9fr) repeat(3, minmax(160px, 1fr));
  gap: 10px;
  align-items: end;
  min-width: 0;
}
.overview-step-row label {
  min-width: 0;
}
.overview-step-row select,
.overview-step-row input {
  width: 100%;
  min-width: 0;
  max-width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  background-color: #0d0d0d;
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: normal;
  text-transform: none;
  padding: 11px 36px 11px 13px;
}
.overview-step-row select {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='none' stroke='%23a7a7a7' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round' d='M1 1.5 6 6.5 11 1.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  cursor: pointer;
}
.overview-step-row select:focus,
.overview-step-row input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
}
.overview-step-name {
  font-weight: 700;
  align-self: center;
  min-width: 0;
  overflow-wrap: anywhere;
}
.overview-step-render {
  grid-template-columns: minmax(170px, 0.9fr) minmax(160px, 1fr);
}
.user-api-key-row {
  margin-top: 10px;
}
@media (max-width: 760px) {
  .overview-step-row,
  .overview-step-render {
    grid-template-columns: 1fr;
  }
}
.generation-grid .video-overview-options {
  grid-column: 1 / -1;
  display: block;
  width: 100%;
  box-sizing: border-box;
}
.video-overview-options > .checkbox-row {
  display: flex;
  flex-direction: row;
  align-items: center;
  width: 100%;
  margin: 6px 0;
}
.video-overview-fields {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
  margin-top: 12px;
  min-width: 0;
}
.video-overview-fields > p,
.video-overview-fields > .overview-steps {
  grid-column: 1 / -1;
}
.video-overview-fields > label {
  min-width: 0;
  width: 100%;
}
.video-overview-fields > label input,
.video-overview-fields > label select {
  width: 100%;
  box-sizing: border-box;
}
.overview-steps {
  width: 100%;
  box-sizing: border-box;
  overflow: visible;
}
.overview-step-row > label {
  display: flex;
  flex-direction: column;
  flex: initial;
  width: 100%;
  min-width: 0;
  box-sizing: border-box;
  gap: 6px;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.overview-step-row select,
.overview-step-row input {
  box-sizing: border-box;
}