/* ================================================
   SESIÓN CSS — Intro a la IA · San Luis Potosí
   Estilos compartidos para todas las páginas de sesión
================================================ */

/* ---- Variables CSS globales ---- */
:root {
  --c-primary:       #2780e3;
  --c-primary-hover: #1a6fc4;
  --c-accent:        #0ea5e9;
  --c-navy:          #1a365d;
  --c-muted:         #64748b;
  --c-border:        #e2e8f0;
  --c-border-blue:   #dbeafe;
  --c-bg-blue:       #f0f7ff;
  --c-gray-50:       #f8fafc;
  --c-gray-400:      #94a3b8;
  --radius:          8px;

  /* Mermaid variables consumed by Quarto site-wide */
  --mermaid-bg-color: #f8fbff;
  --mermaid-edge-color: #94a3b8;
  --mermaid-fg-color: #1a365d;
  --mermaid-fg-color--lighter: #475569;
  --mermaid-fg-color--lightest: #64748b;
  --mermaid-font-family: "Aptos", "Segoe UI", system-ui, sans-serif;
  --mermaid-label-bg-color: #ffffff;
  --mermaid-label-fg-color: #2780e3;
  --mermaid-node-bg-color: rgba(39, 128, 227, 0.1);
  --mermaid-node-fg-color: #1a365d;
}

/* ---- Navbar logo: oculta el texto de título junto al logo ---- */
.navbar-title {
  display: none !important;
}

.navbar-logo {
  height: 32px !important;
  width: auto !important;
}

/* ---- Banner de sesión ---- */

.sesion-banner {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-top: 3px solid #2780e3;
  border-radius: 12px;
  padding: 1.4rem 1.75rem;
  margin: 0 0 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.sesion-block-pill {
  display: inline-block;
  background: #2780e3;
  color: #fff;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 3px 12px;
  border-radius: 9999px;
  width: fit-content;
}

.sesion-progress-wrap {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.sesion-progress-bar {
  flex: 1;
  height: 5px;
  background: #e2e8f0;
  border-radius: 9999px;
  overflow: hidden;
}

.sesion-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #2780e3, #0ea5e9);
  border-radius: 9999px;
}

.sesion-progress-fill-1 {
  width: 6.67%;
}

.sesion-progress-fill-2 {
  width: 13.34%;
}

.sesion-progress-label {
  font-size: 0.72rem;
  font-weight: 700;
  color: #2780e3;
  white-space: nowrap;
}

.sesion-meta {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  align-items: center;
  font-size: 0.78rem;
  color: #64748b;
}

.sesion-meta-chip {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.sesion-meta a {
  margin-left: auto;
  font-size: 0.78rem;
  color: #2780e3;
  font-weight: 600;
  text-decoration: none;
}
.sesion-meta a:hover {
  text-decoration: underline;
}

/* ---- Video placeholder ---- */

.video-placeholder {
  background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 100%);
  border-radius: 12px;
  padding: 3rem 2rem;
  text-align: center;
  margin-bottom: 2rem;
  border: 1px solid rgba(39, 128, 227, 0.25);
}

.video-placeholder .vp-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
  opacity: 0.6;
  display: block;
}

.video-placeholder .vp-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: #e2e8f0;
  margin: 0 0 0.4rem;
}

.video-placeholder p {
  margin: 0;
  color: #94a3b8;
  font-size: 0.88rem;
}

/* ---- Mermaid diagrams ---- */

.cell-output-display .mermaid,
.mermaid {
  display: flex;
  justify-content: center;
  margin: 1rem 0 1.2rem;
}

.cell-output-display .mermaid svg,
.mermaid svg {
  max-width: 100%;
  height: auto;
  border-radius: 18px;
}

.cell-output-display .mermaid .node rect,
.cell-output-display .mermaid .node polygon,
.cell-output-display .mermaid .node path,
.cell-output-display .mermaid .node circle,
.mermaid .node rect,
.mermaid .node polygon,
.mermaid .node path,
.mermaid .node circle {
  stroke-width: 1.4px;
}

.cell-output-display .mermaid .label,
.mermaid .label {
  font-weight: 600;
}

.cell-output-display .mermaid .edgeLabel,
.mermaid .edgeLabel {
  background: transparent !important;
}

.cell-output-display .mermaid .cluster rect,
.mermaid .cluster rect {
  fill: rgba(39, 128, 227, 0.05) !important;
  stroke: rgba(39, 128, 227, 0.16) !important;
  rx: 14px;
  ry: 14px;
}

/* ---- App cards (TikTok, Spotify, etc.) ---- */

.app-row {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  margin: 1.6rem 0;
}

.app-card {
  flex: 0 0 130px;
  display: block;
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  border-radius: 14px;
  padding: 1rem 0.7rem 0.9rem;
  text-align: center;
  border: 1px solid var(--c-border);
  box-shadow: 0 8px 26px rgba(15, 23, 42, 0.05);
  position: relative;
  overflow: hidden;
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
}

.app-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 4px;
  background: linear-gradient(90deg, color-mix(in srgb, var(--accent, #888) 84%, white), color-mix(in srgb, var(--accent, #888) 32%, white));
}

.app-card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--accent, #888) 24%, var(--c-border));
  box-shadow: 0 18px 36px rgba(15, 23, 42, 0.08);
}

.app-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 0.5rem;
  border-radius: 16px;
  background: color-mix(in srgb, var(--accent, #888) 10%, white);
  display: grid;
  place-items: center;
  transition: transform 0.22s ease, background 0.22s ease;
}

.app-icon img { width: 100%; height: 100%; object-fit: contain; }

.app-card:hover .app-icon {
  transform: translateY(-2px);
  background: color-mix(in srgb, var(--accent, #888) 14%, white);
}

.app-name {
  font-size: 0.85rem;
  font-weight: 700;
  margin: 0 0 0.2rem;
  color: #222;
}

.app-desc {
  font-size: 0.68rem;
  color: #666;
  margin: 0 0 0.55rem;
  line-height: 1.4;
}

.ai-badge {
  display: inline-block;
  font-size: 0.6rem;
  padding: 3px 8px;
  border-radius: 20px;
  background: color-mix(in srgb, var(--accent, #888) 12%, white);
  color: color-mix(in srgb, var(--accent, #888) 80%, #1e293b);
  font-weight: 600;
  letter-spacing: 0.02em;
  border: 1px solid color-mix(in srgb, var(--accent, #888) 22%, white);
}

.app-detail { flex: 1; padding-top: 0.2rem; }
.app-detail h4 { margin: 0 0 0.4rem; font-size: 1rem; color: var(--c-navy); }
.app-detail p  { margin: 0 0 0.4rem; font-size: 0.92rem; line-height: 1.6; color: #334155; }

.app-detail .ai-type {
  font-size: 0.78rem;
  color: var(--c-muted);
  border-left: 3px solid color-mix(in srgb, var(--accent, #888) 60%, white);
  padding-left: 0.6rem;
  margin-top: 0.5rem;
}

@media (max-width: 560px) {
  .app-row { flex-direction: column; }
  .app-card { flex: unset; width: 100%; }
}

/* ---- Navegación entre sesiones ---- */

.sesion-nav {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  gap: 0.75rem;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-top: 3px solid #2780e3;
  border-radius: 0 0 12px 12px;
  padding: 1.1rem 1.5rem;
  margin-top: 3rem;
}

.sesion-nav-btn {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  text-decoration: none !important;
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
  transition: background 0.15s;
  min-width: 140px;
  max-width: 220px;
}

.sesion-nav-btn:hover:not(.disabled) {
  background: #eff6ff;
  text-decoration: none !important;
}

.sesion-nav-btn.disabled {
  opacity: 0.38;
  cursor: default;
  pointer-events: none;
}

.sesion-nav-btn .nav-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #2780e3;
  font-weight: 700;
}

.sesion-nav-btn .nav-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: #1e293b;
  line-height: 1.3;
}

.sesion-nav-btn.next {
  text-align: right;
  align-items: flex-end;
}

.sesion-nav-btn.prev {
  text-align: left;
  align-items: flex-start;
}

.sesion-nav-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  color: #94a3b8;
  font-size: 0.75rem;
  flex: 1;
}

.sesion-nav-progress {
  font-size: 0.72rem;
  color: #94a3b8;
}

.sesion-nav-dots {
  display: flex;
  gap: 4px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
}

.sesion-nav-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #e2e8f0;
  display: inline-block;
  transition: background 0.2s;
}

.sesion-nav-dot.active {
  background: #2780e3;
  width: 10px;
  height: 10px;
}

.sesion-nav-dot.published {
  background: #93c5fd;
}

@media (max-width: 560px) {
  .sesion-nav {
    flex-wrap: wrap;
    padding: 1rem;
  }
  .sesion-nav-center { width: 100%; order: -1; }
  .sesion-nav-btn { min-width: 0; max-width: none; flex: 1; }
}

/* ================================================
   UTILIDADES — reutilizables en todas las sesiones
================================================ */

/* Caption de figuras y animaciones */
.fig-caption {
  text-align: center;
  color: var(--c-muted);
  font-size: 0.82rem;
  margin: 0 0 0.6rem;
  font-style: italic;
}

/* Wrapper de demos interactivas */
.demo-wrap {
  margin: 1.5rem 0;
}

.demo-shell {
  --demo-accent: var(--c-primary);
  --demo-accent-soft: rgba(39, 128, 227, 0.12);
  --demo-accent-strong: rgba(39, 128, 227, 0.2);
  background:
    radial-gradient(circle at top left, var(--demo-accent-soft), transparent 34%),
    linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
  border: 1px solid var(--c-border);
  border-radius: 22px;
  padding: 1.1rem;
  box-shadow: 0 14px 36px rgba(15, 23, 42, 0.05);
}

.demo-tone-ranking {
  --demo-accent: #0ea5e9;
  --demo-accent-soft: rgba(14, 165, 233, 0.12);
  --demo-accent-strong: rgba(14, 165, 233, 0.22);
}

.demo-tone-supervised {
  --demo-accent: #2563eb;
  --demo-accent-soft: rgba(37, 99, 235, 0.12);
  --demo-accent-strong: rgba(37, 99, 235, 0.2);
}

.demo-tone-unsupervised {
  --demo-accent: #14b8a6;
  --demo-accent-soft: rgba(20, 184, 166, 0.12);
  --demo-accent-strong: rgba(20, 184, 166, 0.22);
}

.demo-tone-rl {
  --demo-accent: #f59e0b;
  --demo-accent-soft: rgba(245, 158, 11, 0.12);
  --demo-accent-strong: rgba(245, 158, 11, 0.2);
}

.demo-shell-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 0.9rem;
}

.demo-shell-copy {
  max-width: 46rem;
}

.demo-eyebrow {
  margin: 0 0 0.2rem;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--demo-accent);
}

.demo-title {
  margin: 0;
  font-size: 1.08rem;
  color: var(--c-navy);
}

.demo-copy {
  margin: 0.35rem 0 0;
  font-size: 0.88rem;
  line-height: 1.65;
  color: #475569;
}

.demo-stage {
  border: 1px solid color-mix(in srgb, var(--demo-accent) 12%, var(--c-border));
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.84);
  overflow: hidden;
}

.demo-stage-preview {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 250px;
  padding: 1rem;
  background:
    linear-gradient(135deg, rgba(255,255,255,0.88), rgba(240,247,255,0.88)),
    linear-gradient(180deg, #fff 0%, #f8fafc 100%);
}

.demo-stage-live {
  display: none;
  padding: 1rem;
}

.demo-shell.is-active .demo-stage-preview {
  display: none;
}

.demo-shell.is-active .demo-stage-live {
  display: block;
}

.demo-preview-card {
  max-width: 440px;
  text-align: center;
}

.demo-preview-visual {
  display: grid;
  place-items: center;
  min-height: 140px;
  margin-bottom: 0.8rem;
}

.demo-preview-title {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-navy);
}

.demo-preview-copy {
  margin: 0.35rem auto 0;
  max-width: 34ch;
  font-size: 0.84rem;
  line-height: 1.6;
  color: var(--c-muted);
}

.demo-body-grid {
  display: grid;
  gap: 1rem;
}

.demo-two-col {
  grid-template-columns: minmax(0, 1.05fr) minmax(260px, 0.95fr);
}

.demo-insights {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
  margin-top: 0.9rem;
}

.demo-insight {
  border: 1px solid color-mix(in srgb, var(--demo-accent) 12%, var(--c-border));
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.9);
  padding: 0.85rem 0.95rem;
}

.demo-insight h5 {
  margin: 0 0 0.25rem;
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--demo-accent);
}

.demo-insight p {
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.62;
  color: #334155;
}

.demo-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-top: 0.95rem;
  padding-top: 0.9rem;
  border-top: 1px solid rgba(148, 163, 184, 0.18);
}

.demo-status {
  flex: 1;
  min-height: 1.4em;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--c-navy);
}

.demo-actions {
  display: flex;
  gap: 0.55rem;
  flex-wrap: wrap;
}

.demo-btn {
  appearance: none;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.55rem 1rem;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.18s ease, background 0.18s ease, border-color 0.18s ease, color 0.18s ease, opacity 0.18s ease;
}

.demo-btn:hover:not(:disabled),
.btn-restart:hover:not(:disabled) {
  transform: translateY(-1px);
}

.demo-btn-primary {
  background: var(--demo-accent);
  color: #fff;
  box-shadow: 0 10px 20px color-mix(in srgb, var(--demo-accent) 24%, transparent);
}

.demo-btn-secondary {
  background: rgba(255, 255, 255, 0.92);
  color: var(--demo-accent);
  border-color: color-mix(in srgb, var(--demo-accent) 28%, var(--c-border));
}

.demo-btn:disabled,
.btn-restart:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* Botón de reinicio de animaciones */
.btn-restart {
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--c-border);
  border-radius: 999px;
  padding: 0.55rem 0.95rem;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--c-muted);
  transition: border-color 0.15s, color 0.15s, background 0.15s, opacity 0.15s, transform 0.15s;
}
.btn-restart:hover {
  border-color: var(--c-primary);
  color: var(--c-primary);
  background: #fff;
}

/* Caja de fórmula / código matemático */
.formula-box {
  background: var(--c-bg-blue);
  border-radius: var(--radius);
  padding: 0.8rem 1.4rem;
  margin: 0.6rem 0;
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
  line-height: 2.2;
}

/* Nota positiva (verde) */
.highlight-green {
  background: #dcfce7;
  border-left: 4px solid #16a34a;
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 0.9rem 1.2rem;
  margin-top: 1.2rem;
}
.highlight-green p          { margin: 0; }
.highlight-green p + p      { margin-top: 0.4rem; }
.highlight-green p:first-child { font-weight: 700; color: #15803d; font-size: 0.95rem; }
.highlight-green p:last-child  { font-size: 0.85rem; color: #166534; }

/* Nota de aviso (amarillo) */
.highlight-yellow {
  background: #fefce8;
  border-left: 3px solid #d97706;
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 0.7rem 1.2rem;
  margin: 0.5rem 0;
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
  line-height: 2.2;
}

/* Código Python / dark block */
.code-dark {
  background: #1e1e2e;
  color: #cdd6f4;
  padding: 1rem 1.2rem;
  border-radius: var(--radius);
  font-size: 0.8rem;
  overflow-x: auto;
  line-height: 1.7;
  margin: 0.5rem 0;
}

.demo-mini-note {
  margin: 0.65rem 0 0;
  font-size: 0.76rem;
  color: var(--c-muted);
  text-align: center;
}

.demo-table-shell {
  border: 1px solid var(--c-border);
  border-radius: 14px;
  background: #fff;
  overflow: hidden;
}

.demo-table-shell table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.83rem;
}

.demo-table-shell th,
.demo-table-shell td {
  padding: 0.62rem 0.75rem;
  border-bottom: 1px solid #eef2f7;
}

.demo-table-shell th {
  text-align: left;
  background: #f8fbff;
  color: var(--c-navy);
  font-weight: 700;
}

.demo-table-shell td {
  color: #334155;
}

.demo-table-shell tr:last-child td {
  border-bottom: 0;
}

.demo-plot-frame {
  border: 1px solid var(--c-border);
  border-radius: 16px;
  background:
    linear-gradient(180deg, rgba(248, 250, 252, 0.95) 0%, rgba(255, 255, 255, 0.98) 100%);
  padding: 0.8rem;
  min-height: 320px;
}

.demo-plot-frame svg,
.demo-plot-frame canvas {
  display: block;
  max-width: 100%;
  height: auto;
}

.demo-plot-frame-preview {
  min-height: 160px;
  display: grid;
  place-items: center;
}

.demo-slider-card {
  border: 1px solid color-mix(in srgb, var(--demo-accent) 20%, var(--c-border));
  border-radius: 14px;
  background: color-mix(in srgb, var(--demo-accent) 8%, white);
  padding: 0.85rem 1rem;
}

.demo-slider-card p {
  margin: 0 0 0.65rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--c-navy);
}

.demo-slider-row {
  display: flex;
  gap: 0.7rem;
  align-items: center;
  flex-wrap: wrap;
}

.demo-slider-row input[type="range"] {
  width: 180px;
  accent-color: var(--demo-accent);
  cursor: pointer;
}

.demo-kv {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.84rem;
  color: #334155;
}

.demo-kv strong {
  color: var(--c-navy);
}

.demo-value-x,
.demo-value-y {
  text-align: center;
  font-weight: 700;
}

.demo-value-x {
  color: #1d4ed8;
}

.demo-value-y {
  color: #dc2626;
}

.formula-highlight {
  color: #2563eb;
}

.formula-box-preview {
  text-align: center;
  min-width: 240px;
}

.demo-th-center {
  text-align: center !important;
}

.lr-live-grid {
  grid-template-columns: minmax(0, 1.12fr) minmax(280px, 0.88fr);
}

.lr-side {
  display: grid;
  gap: 0.9rem;
  align-content: start;
}

.lr-challenge-card,
.lr-rise-card {
  border: 1px solid color-mix(in srgb, var(--demo-accent) 18%, var(--c-border));
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.92);
  padding: 0.9rem 1rem;
}

.lr-challenge-card h5 {
  margin: 0;
  font-size: 0.95rem;
  color: var(--c-navy);
}

.lr-challenge-card p {
  margin: 0.35rem 0 0;
  font-size: 0.84rem;
  line-height: 1.65;
  color: #475569;
}

.lr-challenge-card .lr-card-kicker,
.lr-rise-card .lr-card-kicker {
  margin: 0 0 0.2rem;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  color: var(--demo-accent);
}

.lr-fit-card {
  display: grid;
  gap: 0.9rem;
}

.lr-slider-block {
  display: grid;
  gap: 0.35rem;
}

.lr-slider-block label {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--c-navy);
}

.lr-metric-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.7rem;
}

.lr-mini-card {
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 14px;
  background: #fff;
  padding: 0.8rem 0.85rem;
}

.lr-mini-label {
  display: block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--c-muted);
}

.lr-mini-card strong {
  display: block;
  margin-top: 0.24rem;
  font-size: 0.92rem;
  color: var(--c-navy);
}

.lr-rise-card p {
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.62;
  color: #475569;
}

.lr-rise-note {
  margin-top: 0.45rem !important;
  color: var(--c-muted);
}

.lr-prediction-card {
  margin-top: 0.85rem;
}

.lab-card {
  margin-top: 1rem;
  border: 1px solid var(--c-border);
  border-radius: 18px;
  background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
  padding: 1rem 1.1rem;
}

.lab-card-grid {
  display: grid;
  gap: 0.9rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.lab-card-section {
  border: 1px solid #e8eef7;
  border-radius: 14px;
  background: #fff;
  padding: 0.9rem;
}

.lab-card-section h5 {
  margin: 0 0 0.35rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--c-primary);
}

.lab-card-section p,
.lab-card-section ul {
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.65;
  color: #475569;
}

.lab-card-section ul {
  padding-left: 1rem;
}

.formula-inline {
  margin: 0.45rem 0 0;
  font-family: "Courier New", monospace;
  font-size: 0.88rem;
  color: var(--c-navy);
}

.lab-formula {
  margin-top: 0.9rem;
  text-align: center;
}

.lab-note {
  margin: 0.9rem 0 0;
  color: #475569;
  font-size: 0.86rem;
  line-height: 1.7;
}

.lab-code {
  margin-top: 0.9rem;
}

.demo-phone-preview,
.demo-phone-stage {
  width: 154px;
  height: 276px;
  border-radius: 28px;
  border: 1px solid rgba(255,255,255,0.35);
  background: linear-gradient(180deg, #0f172a 0%, #111827 100%);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.24);
  position: relative;
  overflow: hidden;
}

.demo-phone-preview::before,
.demo-phone-stage::before {
  content: "";
  position: absolute;
  top: 8px;
  left: 50%;
  width: 60px;
  height: 10px;
  transform: translateX(-50%);
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
}

.tt-preview-stack {
  display: grid;
  gap: 0.6rem;
  justify-items: center;
}

.tt-preview-slab {
  width: 150px;
  height: 24px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(148, 163, 184, 0.22), rgba(14, 165, 233, 0.28));
}

.tt-preview-slab-wide {
  width: 170px;
}

.tt-preview-slab-mid {
  width: 132px;
}

.tt-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) 168px;
  gap: 1rem;
  align-items: center;
}

.tt-signal-list {
  display: grid;
  gap: 0.7rem;
}

.tt-card {
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 16px;
  background: #fff;
  padding: 0.8rem;
  box-shadow: 0 10px 26px rgba(15, 23, 42, 0.05);
}

.tt-card.is-winner {
  border-color: rgba(14, 165, 233, 0.38);
  box-shadow: 0 16px 34px rgba(14, 165, 233, 0.14);
}

.tt-card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.tt-card-title {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 700;
  color: var(--c-navy);
}

.tt-card-emoji {
  font-size: 1.2rem;
}

.tt-card-meta {
  font-size: 0.72rem;
  color: #64748b;
  font-weight: 500;
}

.tt-score-pill {
  font-size: 0.72rem;
  font-weight: 700;
  color: #0f172a;
  background: rgba(14, 165, 233, 0.1);
  border-radius: 999px;
  padding: 0.25rem 0.55rem;
}

.tt-signal-row {
  display: grid;
  grid-template-columns: 92px 1fr 40px;
  gap: 0.5rem;
  align-items: center;
  font-size: 0.76rem;
  color: #475569;
}

.tt-signal-track {
  height: 6px;
  border-radius: 999px;
  background: #e2e8f0;
  overflow: hidden;
}

.tt-signal-fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(14, 165, 233, 0.55), rgba(14, 165, 233, 0.9));
  width: 0%;
}

.tt-phone-screen {
  position: absolute;
  inset: 18px 10px 12px;
  border-radius: 22px;
  background: linear-gradient(180deg, #111827 0%, #0f172a 100%);
  overflow: hidden;
}

.tt-phone-topbar {
  position: absolute;
  inset: 0 0 auto;
  padding: 0.9rem 0.8rem 0.55rem;
  display: flex;
  justify-content: space-between;
  color: rgba(255,255,255,0.76);
  font-size: 0.62rem;
  letter-spacing: 0.04em;
}

.tt-phone-topbar strong {
  color: #fff;
  border-bottom: 2px solid #fff;
  padding-bottom: 0.15rem;
}

.tt-phone-video {
  position: absolute;
  inset: 2.2rem 0 0;
  display: grid;
  place-items: center;
  color: #fff;
  background: radial-gradient(circle at top, rgba(34,211,238,0.28), transparent 28%), linear-gradient(180deg, #0f172a 0%, #111827 100%);
  transition: background 0.32s ease;
}

.tt-phone-caption {
  position: absolute;
  inset: auto 0 0;
  padding: 0.85rem;
  background: linear-gradient(180deg, transparent 0%, rgba(0,0,0,0.72) 100%);
  color: #fff;
  font-size: 0.68rem;
  line-height: 1.45;
}

.tt-phone-actions {
  position: absolute;
  right: 0.6rem;
  bottom: 3.8rem;
  display: grid;
  gap: 0.45rem;
  color: rgba(255,255,255,0.88);
  font-size: 0.85rem;
}

.tt-phone-placeholder {
  font-size: 0.74rem;
  color: rgba(255,255,255,0.52);
}

.tt-phone-emoji {
  font-size: 2.8rem;
}

.app-tour-shell .demo-stage-preview {
  min-height: 220px;
}

.app-tour-preview-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.65rem;
}

.app-tour-preview-card {
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 16px;
  padding: 0.75rem;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.04);
}

.app-tour-preview-card strong {
  display: block;
  font-size: 0.8rem;
  color: var(--c-navy);
}

.app-tour-preview-card span {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.72rem;
  line-height: 1.45;
  color: var(--c-muted);
}

.app-tour-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(280px, 1.05fr);
  gap: 1rem;
}

.app-tour-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  align-content: start;
}

.app-tour-card {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  width: 100%;
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.92);
  padding: 0.85rem;
  text-align: left;
  cursor: pointer;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease, background 0.18s ease;
}

.app-tour-card-head {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  min-width: 0;
}

[data-app="instagram"] .app-tour-card-head {
  gap: 0;
}

.app-tour-card:hover,
.app-tour-card:focus-visible {
  border-color: rgba(14, 165, 233, 0.34);
  box-shadow: 0 12px 24px rgba(14, 165, 233, 0.08);
  transform: translateY(-1px);
}

.app-tour-card.is-active {
  border-color: rgba(14, 165, 233, 0.4);
  background: linear-gradient(180deg, #ffffff 0%, #f4fbff 100%);
  box-shadow: 0 14px 28px rgba(14, 165, 233, 0.1);
}

.app-tour-logo {
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  display: grid;
  place-items: center;
  overflow: hidden;
}

.app-tour-logo img {
  width: 70%;
  height: 70%;
  object-fit: contain;
}

.app-tour-logo-fallback {
  display: none;
  width: 100%;
  height: 100%;
  place-items: center;
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--c-navy);
}

.app-tour-logo.has-fallback img {
  display: none;
}

.app-tour-logo.has-fallback .app-tour-logo-fallback {
  display: grid;
}

.app-tour-card-copy {
  display: grid;
  gap: 0.22rem;
  min-width: 0;        /* evita desbordamiento en contexto flex */
  overflow: hidden;
}

.app-tour-card-name {
  flex: 1;
  min-width: 0;
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--c-navy);
}

.app-tour-card-desc {
  font-size: 0.74rem;
  line-height: 1.45;
  color: var(--c-muted);
}

.app-tour-detail {
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(255,255,255,0.96) 0%, rgba(248,251,255,0.96) 100%);
  padding: 1rem 1.05rem;
  min-height: 100%;
}

/* Fila superior del detalle: tipo + pill en fila con wrap */
.app-tour-detail-top {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 0.3rem;
}

.app-tour-detail-kicker {
  margin: 0;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  color: var(--c-accent);
}

.app-tour-detail-title {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
  color: var(--c-navy);
}

.app-tour-detail-body {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.68;
  color: #334155;
}

.app-tour-type-pill {
  padding: 0.28rem 0.6rem;
  border-radius: 999px;
  background: rgba(14, 165, 233, 0.1);
  border: 1px solid rgba(14, 165, 233, 0.18);
  color: #0369a1;
  font-size: 0.7rem;
  font-weight: 700;
  white-space: nowrap;
}

.app-tour-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.85rem;
}

.app-tour-chip {
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  background: #fff;
  border: 1px solid #e2e8f0;
  color: #475569;
  font-size: 0.74rem;
  font-weight: 600;
}

.km-cluster-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.km-cluster-tag {
  padding: 0.34rem 0.68rem;
  border-radius: 999px;
  font-size: 0.74rem;
  font-weight: 700;
  background: rgba(255,255,255,0.92);
  border: 1px solid rgba(148, 163, 184, 0.24);
  color: #334155;
}

.km-cluster-tags-live {
  margin-top: 0.85rem;
}

.km-cluster-a {
  border-color: rgba(37, 99, 235, 0.2);
  color: #2563eb;
}

.km-cluster-b {
  border-color: rgba(20, 184, 166, 0.2);
  color: #0f766e;
}

.km-cluster-c {
  border-color: rgba(245, 158, 11, 0.2);
  color: #b45309;
}

.rl-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 210px;
  gap: 1rem;
  align-items: start;
}

.rl-panel {
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.88);
  padding: 0.9rem;
}

.rl-panel-preview {
  max-width: 320px;
}

.rl-panel h5 {
  margin: 0 0 0.55rem;
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #d97706;
}

.rl-metrics {
  display: grid;
  gap: 0.55rem;
}

.rl-metric {
  border: 1px solid #f1f5f9;
  border-radius: 12px;
  padding: 0.65rem 0.75rem;
  background: #fff;
}

.rl-metric-label {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.rl-metric-value {
  display: block;
  margin-top: 0.2rem;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--c-navy);
}

.rl-canvas-frame {
  padding: 0.6rem;
  min-height: auto;
}

.rl-canvas {
  width: 100%;
  height: auto;
  display: block;
}

/* ---- Nested concept map ---- */
.concept-shell .demo-stage-preview {
  min-height: 240px;
}

.concept-shell .demo-stage-live {
  padding: 1rem;
}

.concept-preview-stack {
  display: grid;
  gap: 0.65rem;
  width: min(100%, 360px);
}

.concept-preview-layer {
  border-radius: 18px;
  padding: 0.85rem 1rem;
  text-align: left;
  border: 1px solid #dbeafe;
  background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.04);
}

.concept-preview-layer:nth-child(2) {
  width: 82%;
  margin-left: auto;
  border-color: #bae6fd;
}

.concept-preview-layer:nth-child(3) {
  width: 62%;
  margin-left: auto;
  border-color: #c7d2fe;
}

.concept-preview-layer strong {
  display: block;
  color: var(--c-navy);
  font-size: 0.88rem;
}

.concept-preview-layer span {
  display: block;
  margin-top: 0.22rem;
  font-size: 0.74rem;
  line-height: 1.5;
  color: var(--c-muted);
}

.concept-map-card {
  max-width: 560px;
  margin: 0 auto;
  padding: 1rem;
  border-radius: 24px;
  border: 1px solid var(--c-border);
  background:
    radial-gradient(circle at top left, rgba(39, 128, 227, 0.08), transparent 42%),
    linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.05);
}

.concept-map-stage {
  position: relative;
  height: 320px;
}

.concept-layer {
  position: absolute;
  border: 1px solid transparent;
  border-radius: 28px;
  padding: 1.1rem 1.2rem;
  text-align: left;
  font: inherit;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, opacity 0.2s ease;
}

.concept-layer:focus-visible {
  outline: 2px solid var(--c-primary);
  outline-offset: 3px;
}

.concept-layer:hover {
  transform: translateY(-2px);
}

.concept-layer.is-active {
  transform: translateY(-3px);
}

.concept-layer-ia {
  inset: 0;
  z-index: 1;
  background: #f0f7ff;
  border-color: #dbeafe;
  color: var(--c-navy);
  box-shadow: inset 0 0 0 1px rgba(39, 128, 227, 0.05);
}

.concept-layer-ml {
  top: 72px;
  left: 19%;
  width: 63%;
  height: 166px;
  z-index: 2;
  background: #ecfeff;
  border-color: #bae6fd;
  color: #155e75;
  box-shadow: 0 10px 24px rgba(14, 165, 233, 0.08);
}

.concept-layer-dl {
  top: 152px;
  left: 41%;
  width: 37%;
  min-height: 108px;
  z-index: 3;
  background: #eef2ff;
  border-color: #c7d2fe;
  color: var(--c-navy);
  box-shadow: 0 12px 28px rgba(26, 54, 93, 0.1);
}

.concept-layer:not(.is-active) {
  opacity: 0.9;
}

.concept-layer.is-active.concept-layer-ia {
  border-color: rgba(39, 128, 227, 0.55);
  box-shadow: inset 0 0 0 1px rgba(39, 128, 227, 0.1), 0 18px 36px rgba(39, 128, 227, 0.1);
}

.concept-layer.is-active.concept-layer-ml {
  border-color: rgba(14, 165, 233, 0.6);
  box-shadow: 0 18px 36px rgba(14, 165, 233, 0.14);
}

.concept-layer.is-active.concept-layer-dl {
  border-color: rgba(26, 54, 93, 0.4);
  box-shadow: 0 18px 36px rgba(26, 54, 93, 0.14);
}

.concept-layer-kicker {
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
  opacity: 0.72;
}

.concept-layer-title {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.2;
}

.concept-layer-note {
  font-size: 0.82rem;
  line-height: 1.45;
  max-width: 24ch;
}

.concept-map-hint {
  margin: 0.9rem 0 0;
  text-align: center;
  font-size: 0.8rem;
  color: var(--c-muted);
}

.concept-panel {
  max-width: 560px;
  margin: 0.9rem auto 0;
  padding: 1rem 1.2rem 1.1rem;
  border-radius: 18px;
  border: 1px solid var(--c-border);
  background: #fff;
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.04);
  transition: background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.concept-panel[data-tone="ia"] {
  background: #f8fbff;
  border-color: #dbeafe;
}

.concept-panel[data-tone="ml"] {
  background: #f3fcff;
  border-color: #bae6fd;
}

.concept-panel[data-tone="dl"] {
  background: #f8faff;
  border-color: #c7d2fe;
}

.concept-panel-eyebrow {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  color: var(--c-muted);
}

.concept-panel-title {
  margin: 0.25rem 0 0.45rem;
  font-size: 1.05rem;
  color: var(--c-navy);
}

.concept-panel-body {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.65;
  color: #334155;
}

.concept-panel-label {
  margin-top: 0.8rem;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.concept-panel-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.55rem;
}

.concept-chip {
  display: inline-flex;
  align-items: center;
  padding: 0.34rem 0.72rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--c-navy);
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(148, 163, 184, 0.35);
}

@media (max-width: 640px) {
  .demo-shell {
    padding: 0.95rem;
    border-radius: 18px;
  }

  .demo-shell-head,
  .demo-footer,
  .demo-insights,
  .demo-two-col,
  .lr-live-grid,
  .nn-mini-stage,
  .nn-network-stage,
  .playground-mission-grid,
  .tt-layout,
  .app-tour-grid,
  .app-tour-preview-grid,
  .rl-layout,
  .lab-card-grid {
    grid-template-columns: 1fr;
    flex-direction: column;
  }

  .demo-shell-head,
  .demo-footer {
    align-items: stretch;
  }

  .demo-actions {
    width: 100%;
  }

  .demo-actions .demo-btn,
  .demo-actions .btn-restart {
    width: 100%;
    justify-content: center;
  }

  .demo-insights {
    grid-template-columns: 1fr;
  }

  .demo-stage-preview,
  .demo-stage-live {
    padding: 0.85rem;
  }

  .app-tour-list {
    grid-template-columns: 1fr;
  }

  .lr-metric-grid {
    grid-template-columns: 1fr;
  }

  .nn-links {
    grid-auto-flow: column;
    justify-content: center;
  }

  .nn-link {
    width: 48px;
    transform: rotate(90deg);
  }

  .tt-card-head {
    align-items: flex-start;
  }

  .tt-signal-row {
    grid-template-columns: 78px 1fr 36px;
  }

  .demo-plot-frame {
    min-height: 280px;
  }

  .concept-map-card {
    padding: 0.8rem;
    border-radius: 20px;
  }

  .concept-map-stage {
    height: 350px;
  }

  .concept-layer {
    padding: 0.9rem 1rem;
    border-radius: 22px;
  }

  .concept-layer-ml {
    top: 92px;
    left: 10%;
    width: 76%;
    height: 170px;
  }

  .concept-layer-dl {
    top: 206px;
    left: 22%;
    width: 60%;
    min-height: 104px;
  }

  .concept-layer-title {
    font-size: 0.94rem;
  }

  .concept-layer-note {
    font-size: 0.78rem;
    max-width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .demo-shell *,
  .app-tour-card,
  .concept-layer,
  .app-card,
  .btn-restart,
  .demo-btn {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }

  .demo-btn:hover:not(:disabled),
  .btn-restart:hover:not(:disabled),
  .concept-layer:hover,
  .concept-layer.is-active,
  .app-tour-card:hover,
  .app-card:hover {
    transform: none !important;
  }
}

/* ---- Flow diagram strips (reemplaza flowcharts de Mermaid) ---- */
.flow-strip {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0;
  padding: 0.75rem 1rem;
  border-radius: 14px;
  font-size: 0.86rem;
}

.flow-strip-teal {
  background: #f0fdfa;
  border: 1px solid #a7f3d0;
}

.flow-strip-amber {
  background: #fffbeb;
  border: 1px solid #fde68a;
}

.flow-node {
  padding: 0.32rem 0.7rem;
  background: #fff;
  border-radius: 999px;
  font-weight: 600;
  color: #1e293b;
  border: 1px solid rgba(148, 163, 184, 0.35);
}

.flow-cluster-a { border-color: #93c5fd; color: #1d4ed8; }
.flow-cluster-b { border-color: #fcd34d; color: #92400e; }
.flow-cluster-c { border-color: #86efac; color: #166534; }

.flow-arrow {
  color: #64748b;
  font-size: 0.8rem;
}

/* ---- Visuales de redes neuronales ---- */
.nn-mini-stage,
.nn-network-stage {
  display: grid;
  gap: 1rem;
  align-items: center;
}

.nn-mini-stage {
  grid-template-columns: minmax(0, 1fr) 48px 180px 48px minmax(0, 1fr);
}

.nn-network-stage {
  grid-template-columns: repeat(4, minmax(120px, 1fr));
}

.nn-column,
.nn-network-col {
  display: grid;
  gap: 0.65rem;
  justify-items: center;
}

.nn-column-center {
  align-content: center;
}

.nn-column-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.nn-node {
  width: 100%;
  max-width: 180px;
  border-radius: 16px;
  border: 1px solid rgba(148, 163, 184, 0.24);
  background: #fff;
  color: var(--c-navy);
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1.45;
  text-align: center;
  padding: 0.7rem 0.85rem;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.04);
}

.nn-node-round {
  width: 58px;
  height: 58px;
  max-width: none;
  border-radius: 999px;
  display: grid;
  place-items: center;
  padding: 0;
  font-size: 1rem;
}

.nn-node-input {
  background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
  border-color: rgba(37, 99, 235, 0.22);
}

.nn-node-hidden {
  background: linear-gradient(180deg, #ffffff 0%, #f0fdfa 100%);
  border-color: rgba(20, 184, 166, 0.24);
}

.nn-node-output {
  background: linear-gradient(180deg, #ffffff 0%, #eff6ff 100%);
  border-color: rgba(14, 165, 233, 0.24);
}

.nn-links {
  display: grid;
  gap: 0.65rem;
  align-content: center;
}

.nn-link {
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(148, 163, 184, 0.25), rgba(37, 99, 235, 0.42));
}

.nn-stack-caption {
  margin: 0;
  font-size: 0.76rem;
  line-height: 1.5;
  color: var(--c-muted);
  text-align: center;
}

.playground-mission-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
}

.playground-mission-card {
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.92);
  padding: 0.9rem;
}

.playground-mission-card h5 {
  margin: 0.2rem 0 0.35rem;
  font-size: 0.92rem;
  color: var(--c-navy);
}

.playground-mission-card p {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.6;
  color: #475569;
}

/* ---- TikTok profile selector ---- */
.tt-profile-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.85rem;
}

.tt-profile-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--c-muted);
}

.tt-profile-btn {
  padding: 0.32rem 0.7rem;
  border-radius: 999px;
  border: 1.5px solid #94a3b8;
  background: transparent;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  color: #64748b;
  font-family: inherit;
  transition: background 0.18s, color 0.18s, border-color 0.18s;
}

.tt-profile-btn:hover {
  border-color: #0ea5e9;
  color: #0369a1;
}

.tt-profile-btn.is-active {
  background: #e0f2fe;
  border-color: #0ea5e9;
  color: #0369a1;
}

/* Sección expandible (<details>) */
.expand-section {
  margin: 1.2rem 0 0.5rem;
  border: 1px solid var(--c-border-blue);
  border-radius: 10px;
  overflow: hidden;
}
.expand-summary {
  cursor: pointer;
  padding: 0.9rem 1.2rem;
  font-weight: 600;
  color: #1e40af;
  background: #eff6ff;
  user-select: none;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.expand-summary-hint {
  font-weight: 400;
  color: var(--c-gray-400);
  font-size: 0.85rem;
}
.expand-body {
  padding: 1.2rem 1.5rem;
  font-size: 0.9rem;
  line-height: 1.7;
}