/* ==========================================================================
   Tonalizador · Tutorial interactivo — Sistema de diseño
   Un observatorio para mirar la música por dentro.
   ========================================================================== */

:root {
  --bg: #07080f;
  --bg-soft: #0b0d18;
  --panel: rgba(255, 255, 255, 0.035);
  --panel-strong: rgba(255, 255, 255, 0.06);
  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.16);
  --text: #e8eaf2;
  --text-dim: #a7abbd;
  --text-faint: #6d7284;
  --acc: #8b7cff;
  --acc-2: #4cc9f0;
  --warm: #ffb86b;
  --ok: #4ade80;
  --warn: #fbbf24;
  --bad: #f87171;
  --grad: linear-gradient(92deg, var(--acc), var(--acc-2));
  --radius: 18px;
  --radius-sm: 12px;
  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Inter", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --shadow: 0 18px 60px rgba(0, 0, 0, 0.45);
  --maxw: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection { background: rgba(139, 124, 255, 0.35); }

img, svg, canvas { max-width: 100%; display: block; }

button { font-family: inherit; cursor: pointer; }

a { color: var(--acc-2); text-decoration: none; }
a:hover { text-decoration: underline; }

:focus-visible {
  outline: 2px solid var(--acc-2);
  outline-offset: 3px;
  border-radius: 6px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001s !important;
    transition-duration: 0.001s !important;
  }
}

/* --------------------------------------------------------------------------
   Fondo de estrellas / textura
   -------------------------------------------------------------------------- */

.sky {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(1200px 700px at 75% -10%, rgba(139, 124, 255, 0.14), transparent 60%),
    radial-gradient(1000px 600px at 10% 110%, rgba(76, 201, 240, 0.1), transparent 60%),
    var(--bg);
}

.grain {
  position: fixed;
  inset: 0;
  z-index: -1;
  opacity: 0.5;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3CfeColorMatrix type='matrix' values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0.028 0'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* --------------------------------------------------------------------------
   Barra de progreso + navegación por capítulos
   -------------------------------------------------------------------------- */

.progress-bar {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0;
  background: var(--grad);
  z-index: 60;
  transition: width 0.1s linear;
}

.chapter-nav {
  position: fixed;
  right: 22px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 50;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.chapter-nav a {
  width: 9px; height: 9px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.18);
  position: relative;
  transition: background 0.25s, transform 0.25s;
}

.chapter-nav a:hover { text-decoration: none; }

.chapter-nav a.active {
  background: var(--acc);
  transform: scale(1.35);
  box-shadow: 0 0 12px rgba(139, 124, 255, 0.8);
}

.chapter-nav a .tip {
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  white-space: nowrap;
  font-size: 12.5px;
  color: var(--text-dim);
  background: rgba(10, 12, 24, 0.92);
  border: 1px solid var(--line);
  padding: 4px 10px;
  border-radius: 8px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}

.chapter-nav a:hover .tip, .chapter-nav a:focus-visible .tip { opacity: 1; }

@media (max-width: 900px) { .chapter-nav { display: none; } }

/* --------------------------------------------------------------------------
   Header fijo con menú de capítulos
   -------------------------------------------------------------------------- */

.site-head {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 56px;
  z-index: 55;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 clamp(14px, 3vw, 28px);
  background: rgba(8, 9, 18, 0.78);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.sh-brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14.5px;
  color: var(--text-dim);
  white-space: nowrap;
}
.sh-brand:hover { color: var(--text); text-decoration: none; }
.sh-brand strong { color: var(--text); font-weight: 650; }
.sh-star { color: var(--warm); font-size: 15px; }

.sh-menu-wrap { position: relative; }
.sh-menu-wrap.sh-push { margin-left: auto; }

.sh-menu-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  font-size: 13.5px;
  font-weight: 600;
  padding: 8px 15px;
  border-radius: 999px;
  transition: background 0.2s, border-color 0.2s;
}
.sh-menu-btn:hover { background: rgba(255, 255, 255, 0.1); border-color: rgba(255, 255, 255, 0.3); }
.sh-menu-btn[aria-expanded="true"] { background: rgba(139, 124, 255, 0.18); border-color: var(--acc); }
.sh-menu-btn .chev { transition: transform 0.25s; font-size: 11px; }
.sh-menu-btn[aria-expanded="true"] .chev { transform: rotate(180deg); }

.sh-menu {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  width: min(340px, calc(100vw - 28px));
  max-height: min(72vh, 560px);
  overflow-y: auto;
  background: rgba(12, 14, 26, 0.97);
  backdrop-filter: blur(18px);
  border: 1px solid var(--line-strong);
  border-radius: 16px;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.6);
  padding: 10px;
  animation: menu-in 0.22s cubic-bezier(0.2, 0.8, 0.3, 1);
}

@keyframes menu-in { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: none; } }

.sh-group {
  display: block;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--acc-2);
  padding: 12px 12px 5px;
  border-radius: 9px;
  transition: background 0.15s, color 0.15s;
}

a.sh-group:hover {
  background: rgba(76, 201, 240, 0.1);
  color: #8fe3ff;
  text-decoration: none;
}

.sh-item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  width: 100%;
  text-align: left;
  border: none;
  background: transparent;
  color: var(--text-dim);
  font-size: 14px;
  padding: 8px 12px;
  border-radius: 9px;
  transition: background 0.15s, color 0.15s;
}
.sh-item:hover { background: rgba(255, 255, 255, 0.06); color: var(--text); text-decoration: none; }
.sh-item .n { font-family: var(--font-mono); font-size: 11px; color: var(--text-faint); min-width: 20px; }
.sh-item[aria-current="true"] { background: rgba(139, 124, 255, 0.16); color: var(--text); }
.sh-item[aria-current="true"] .n { color: var(--acc); }

/* Capítulos ya leídos en visitas anteriores */
.sh-item.seen::after {
  content: "✓";
  margin-left: auto;
  color: var(--ok);
  font-size: 12px;
  opacity: 0.85;
}

.sh-featured {
  margin: 2px 2px 8px;
  padding: 11px 12px;
  border: 1px solid rgba(255, 184, 107, 0.45);
  border-radius: 12px;
  background: linear-gradient(120deg, rgba(255, 184, 107, 0.13), rgba(139, 124, 255, 0.1));
  color: var(--text);
  line-height: 1.35;
}
.sh-featured:hover { background: linear-gradient(120deg, rgba(255, 184, 107, 0.22), rgba(139, 124, 255, 0.16)); }
.sh-featured .n { color: var(--warm) !important; font-size: 14px; }
.sh-featured strong { font-weight: 700; }
.sh-featured small { color: var(--text-dim); font-size: 11.5px; font-weight: 500; }
.sh-featured[aria-current="true"] { border-color: var(--warm); }

.sh-app {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--acc-2);
  white-space: nowrap;
}

@media (max-width: 760px) {
  .sh-brand strong { display: none; }
  .sh-app { display: none; }
}

@media (max-width: 560px) {
  .sh-brand { font-size: 13px; }
  .sh-menu-btn .lbl { display: none; }
  .sh-menu-btn { padding: 8px 12px; }
}

.chapter, .hero, .divider-act, #chuleta, .fork { scroll-margin-top: 66px; }

/* --------------------------------------------------------------------------
   Estructura de capítulos
   -------------------------------------------------------------------------- */

.chapter {
  position: relative;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(72px, 11vh, 130px) 24px;
}

.chapter + .chapter { border-top: 1px solid rgba(255, 255, 255, 0.05); }

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--acc-2);
  margin-bottom: 18px;
}

.kicker::before {
  content: "";
  width: 26px; height: 1px;
  background: var(--acc-2);
  opacity: 0.7;
}

.kicker .act {
  color: var(--text-faint);
  font-weight: 500;
}

h1, h2, h3 { font-family: var(--font-display); font-weight: 560; line-height: 1.12; margin: 0; }

h2 {
  font-size: clamp(30px, 4.6vw, 46px);
  letter-spacing: -0.015em;
  margin-bottom: 22px;
  max-width: 20ch;
  color: var(--warm);
}

h3 {
  font-size: clamp(20px, 2.6vw, 26px);
  margin: 40px 0 14px;
  color: var(--text);
}

.prose { max-width: 66ch; }
.prose p { margin: 0 0 1.15em; color: var(--text-dim); }
.prose p strong, .prose li strong { color: var(--text); font-weight: 600; }
.prose em { color: var(--text); font-style: italic; }

.lead {
  font-size: clamp(18px, 2.2vw, 21px);
  line-height: 1.65;
  color: var(--text) !important;
}

.analogy {
  margin: 26px 0;
  padding: 18px 22px;
  border-left: 2px solid var(--warm);
  background: linear-gradient(90deg, rgba(255, 184, 107, 0.07), transparent 70%);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-dim);
  max-width: 66ch;
}
.analogy .tag {
  display: block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--warm);
  margin-bottom: 6px;
}
.analogy p { margin: 0; }

.ponder {
  margin: 54px 0 0;
  padding: 26px 30px;
  border: 1px dashed rgba(139, 124, 255, 0.4);
  border-radius: var(--radius);
  background: rgba(139, 124, 255, 0.05);
  max-width: 66ch;
}
.ponder .tag {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--acc);
  display: block;
  margin-bottom: 8px;
}
.ponder p {
  margin: 0;
  font-family: var(--font-display);
  font-size: 19px;
  line-height: 1.55;
  color: var(--text);
}

/* --------------------------------------------------------------------------
   Paneles interactivos
   -------------------------------------------------------------------------- */

.panel {
  margin: 34px 0;
  padding: clamp(20px, 3.4vw, 34px);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(6px);
}

.panel-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin: 0 0 18px;
}

.panel-title::before {
  content: "";
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--grad);
  box-shadow: 0 0 10px rgba(139, 124, 255, 0.9);
}

.panel-hint { font-size: 14px; color: var(--text-faint); margin: 12px 0 0; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line-strong);
  background: var(--panel-strong);
  color: var(--text);
  font-size: 14.5px;
  font-weight: 600;
  padding: 10px 18px;
  border-radius: 999px;
  transition: transform 0.15s, background 0.2s, border-color 0.2s, box-shadow .2s;
}

.btn:hover { background: rgba(255, 255, 255, 0.1); border-color: rgba(255, 255, 255, 0.28); transform: translateY(-1px); }
.btn:active { transform: translateY(0px) scale(0.98); }

.btn-primary {
  background: var(--grad);
  border: none;
  color: #0a0b14;
  box-shadow: 0 6px 24px rgba(102, 116, 255, 0.35);
}
.btn-primary:hover { background: var(--grad); filter: brightness(1.1); box-shadow: 0 8px 30px rgba(102, 116, 255, 0.5); }

.btn[disabled] { opacity: 0.45; pointer-events: none; }

.btn-row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }

.seg {
  display: inline-flex;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.03);
}
.seg button {
  border: none;
  background: transparent;
  color: var(--text-dim);
  font-size: 14px;
  font-weight: 600;
  padding: 9px 16px;
  transition: background 0.2s, color 0.2s;
}
.seg button[aria-pressed="true"] { background: var(--grad); color: #0a0b14; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  color: var(--text-dim);
  background: rgba(255, 255, 255, 0.04);
}
.chip.ok { color: var(--ok); border-color: rgba(74, 222, 128, 0.4); background: rgba(74, 222, 128, 0.08); }
.chip.warn { color: var(--warn); border-color: rgba(251, 191, 36, 0.4); background: rgba(251, 191, 36, 0.08); }
.chip.bad { color: var(--bad); border-color: rgba(248, 113, 113, 0.4); background: rgba(248, 113, 113, 0.08); }
.chip.acc { color: var(--acc); border-color: rgba(139, 124, 255, 0.45); background: rgba(139, 124, 255, 0.1); }

.mono { font-family: var(--font-mono); font-size: 0.92em; }

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */

.hero {
  min-height: 100svh;
  display: grid;
  place-items: center;
  position: relative;
  padding: 90px 24px 70px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(30px, 5vw, 64px);
  align-items: center;
  max-width: 1180px;
  width: 100%;
}

.hero-text { text-align: left; }

#hero-canvas {
  width: 100%;
  height: min(50vh, 480px);
  display: block;
}

.hero-viz { position: relative; }

@media (max-width: 940px) {
  .hero { padding-top: 76px; }
  .hero-grid { grid-template-columns: 1fr; gap: 10px; }
  .hero-text { text-align: center; }
  .hero-text .btn-row { justify-content: center; }
  #hero-canvas { height: 300px; }
}

.hero .overline {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--acc-2);
  margin-bottom: 22px;
}

.hero h1 {
  font-size: clamp(36px, 5vw, 62px);
  letter-spacing: -0.02em;
  line-height: 1.06;
  margin-bottom: 24px;
  max-width: none;
}

.hero h1 .grad {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero .sub {
  font-size: clamp(16px, 1.7vw, 18.5px);
  color: var(--text-dim);
  max-width: 58ch;
  margin: 0 0 30px;
}

.hero .sub strong { color: var(--text); }

.scroll-cue {
  position: absolute;
  bottom: 26px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--text-faint);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 1;
}

.scroll-cue::after {
  content: "";
  width: 1px;
  height: 42px;
  background: linear-gradient(to bottom, var(--text-faint), transparent);
  animation: cue 2s ease-in-out infinite;
}

@keyframes cue {
  0%, 100% { transform: scaleY(0.4); opacity: 0.4; transform-origin: top; }
  50% { transform: scaleY(1); opacity: 1; transform-origin: top; }
}

.hero-caption {
  margin: 6px auto 0;
  max-width: 58ch;
  display: flex;
  gap: 14px;
  align-items: flex-start;
  text-align: left;
  padding: 16px 20px;
  border: 1px solid rgba(255, 184, 107, 0.28);
  border-radius: var(--radius);
  background: linear-gradient(120deg, rgba(255, 184, 107, 0.07), rgba(139, 124, 255, 0.06));
  backdrop-filter: blur(8px);
}

.hero-caption .star {
  color: var(--warm);
  font-size: 18px;
  line-height: 1.4;
  animation: star-glow 3s ease-in-out infinite;
}

@keyframes star-glow {
  0%, 100% { text-shadow: 0 0 6px rgba(255, 184, 107, 0.5); transform: scale(1); }
  50% { text-shadow: 0 0 18px rgba(255, 184, 107, 1); transform: scale(1.15); }
}

.hero-caption p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--text-dim);
}

.hero-caption p strong { color: var(--warm); font-weight: 650; }
.hero-caption p em { color: var(--text); }

.hero-note { margin-top: 22px; font-size: 13.5px; color: var(--text-faint); }

/* --------------------------------------------------------------------------
   Revelado al hacer scroll
   -------------------------------------------------------------------------- */

/* El ocultamiento solo se activa si el navegador soporta la técnica
   (main.js añade la clase `io` al <html>). En cualquier otro caso, todo
   el contenido es visible desde el primer instante. */

html.io .reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.8s cubic-bezier(0.2, 0.6, 0.2, 1), transform 0.8s cubic-bezier(0.2, 0.6, 0.2, 1);
}

html.io .reveal.is-visible { opacity: 1; transform: none; }

.reveal[data-delay="1"] { transition-delay: 0.12s; }
.reveal[data-delay="2"] { transition-delay: 0.24s; }
.reveal[data-delay="3"] { transition-delay: 0.36s; }

/* --------------------------------------------------------------------------
   Demo de playlists (capítulo problema)
   -------------------------------------------------------------------------- */

.playlists {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}

@media (max-width: 760px) { .playlists { grid-template-columns: 1fr; } }

.playlist {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: rgba(0, 0, 0, 0.25);
}

.playlist header {
  padding: 12px 16px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.pl-song {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  font-size: 14.5px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  transition: background 0.3s;
}

.pl-song:last-child { border-bottom: none; }

.pl-song .dot {
  width: 12px; height: 12px;
  border-radius: 4px;
  flex: none;
  box-shadow: 0 0 8px currentColor;
}

.pl-song .meta { color: var(--text-faint); font-size: 12.5px; margin-left: auto; font-family: var(--font-mono); }

.pl-song.playing { background: rgba(139, 124, 255, 0.14); }

.transition-label {
  text-align: center;
  padding: 6px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-faint);
}

/* --------------------------------------------------------------------------
   Piano
   -------------------------------------------------------------------------- */

.piano-wrap { overflow-x: auto; padding: 6px 2px 14px; }

.piano {
  position: relative;
  display: flex;
  height: 168px;
  min-width: 560px;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
}

.key-white {
  flex: 1;
  position: relative;
  background: linear-gradient(to bottom, #f4f4f8, #dfe0ea);
  border: 1px solid #9aa;
  border-radius: 0 0 8px 8px;
  margin-right: -1px;
  transition: background 0.15s, box-shadow 0.2s;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 8px;
  color: #333950;
  font-size: 12px;
  font-weight: 600;
}

.key-black {
  position: absolute;
  top: 0;
  width: 6.2%;
  height: 60%;
  background: linear-gradient(to bottom, #232637, #10121e);
  border: 1px solid #000;
  border-radius: 0 0 6px 6px;
  z-index: 2;
  transition: background 0.15s, box-shadow 0.2s;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 6px;
  color: #9aa0b8;
  font-size: 10px;
  font-weight: 600;
}

.key-white.in-scale { background: linear-gradient(to bottom, #e6f7ff, #b9e7fb); }
.key-black.in-scale { background: linear-gradient(to bottom, #1c5b74, #0e3b4e); color: #bfeaff; }

.key-white.tonic { background: linear-gradient(to bottom, #ffe7c4, #ffc98a) !important; box-shadow: 0 0 18px rgba(255, 184, 107, 0.55); }
.key-black.tonic { background: linear-gradient(to bottom, #b97b2c, #8a5a1e) !important; color: #fff; }

/* Tecla pulsada: va DESPUÉS de .in-scale y .tonic (y con !important) para que
   siempre gane. La tecla se hunde, se ilumina con fuerza y proyecta halo:
   debe verse de un vistazo cuál está sonando, incluso a un metro de la pantalla. */
.key-white.active,
.key-black.active {
  transform: translateY(4px) scaleY(0.975);
  transform-origin: top center;
  transition: background 0.04s linear, box-shadow 0.06s linear, transform 0.06s ease-out;
}

.key-white.active {
  background: linear-gradient(to bottom, #b9a6ff 0%, #8b6cff 55%, #6f4ff0 100%) !important;
  border-color: #5b3fd0 !important;
  color: #fff !important;
  text-shadow: 0 1px 2px rgba(24, 12, 60, 0.75);
  box-shadow:
    0 0 0 2px rgba(255, 255, 255, 0.55),
    0 0 26px 6px rgba(139, 124, 255, 0.95),
    0 0 54px 14px rgba(139, 124, 255, 0.5),
    inset 0 -10px 18px rgba(60, 32, 160, 0.55),
    inset 0 3px 6px rgba(20, 8, 60, 0.35) !important;
}

.key-black.active {
  background: linear-gradient(to bottom, #a893ff 0%, #7a5cf5 60%, #5636dd 100%) !important;
  border-color: #c9baff !important;
  color: #fff !important;
  text-shadow: 0 1px 2px rgba(12, 4, 40, 0.9);
  box-shadow:
    0 0 0 2px rgba(201, 186, 255, 0.75),
    0 0 26px 6px rgba(139, 124, 255, 1),
    0 0 52px 14px rgba(124, 108, 255, 0.55),
    inset 0 -8px 14px rgba(40, 18, 120, 0.6) !important;
}

/* La tónica pulsada conserva su identidad naranja, pero igual de rotunda. */
.key-white.tonic.active {
  background: linear-gradient(to bottom, #ffab4a 0%, #ff8c1a 55%, #d96a05 100%) !important;
  border-color: #b35700 !important;
  color: #2b1600 !important;
  text-shadow: 0 1px 1px rgba(255, 226, 190, 0.65);
  box-shadow:
    0 0 0 2px rgba(255, 255, 255, 0.6),
    0 0 26px 6px rgba(255, 184, 107, 0.95),
    0 0 56px 16px rgba(255, 160, 60, 0.5),
    inset 0 -10px 18px rgba(180, 96, 12, 0.5) !important;
}

.key-black.tonic.active {
  background: linear-gradient(to bottom, #ffcf8f 0%, #e79433 60%, #b9721e 100%) !important;
  border-color: #ffe0b0 !important;
  color: #2e1c05 !important;
  box-shadow:
    0 0 0 2px rgba(255, 224, 176, 0.8),
    0 0 26px 6px rgba(255, 184, 107, 1),
    0 0 52px 14px rgba(255, 160, 60, 0.5) !important;
}

@media (prefers-reduced-motion: reduce) {
  .key-white.active, .key-black.active { transform: none; }
}

/* --------------------------------------------------------------------------
   Comparador mayor / menor
   -------------------------------------------------------------------------- */

.mood-scene {
  display: grid;
  place-items: center;
  padding: 8px 0 4px;
}

.mood-svg { width: min(340px, 80%); }

/* --------------------------------------------------------------------------
   Rueda Camelot
   -------------------------------------------------------------------------- */

.wheel-layout {
  display: grid;
  grid-template-columns: minmax(300px, 480px) 1fr;
  gap: 30px;
  align-items: center;
}

@media (max-width: 860px) { .wheel-layout { grid-template-columns: 1fr; } }

#camelot-svg { width: 100%; height: auto; }

.wheel-cell { cursor: pointer; transition: opacity 0.3s; }
.wheel-cell path { transition: fill 0.3s, stroke 0.3s, filter .3s; }
.wheel-cell text { pointer-events: none; }
.wheel-cell:hover path { filter: brightness(1.35); }
.wheel-cell:focus-visible { outline: none; }
.wheel-cell:focus-visible path { stroke: #fff; stroke-width: 2; }

.wheel-info {
  border-left: 1px solid var(--line);
  padding-left: 28px;
  min-height: 300px;
}

@media (max-width: 860px) { .wheel-info { border-left: none; padding-left: 0; } }

.wheel-key-name { font-family: var(--font-display); font-size: 32px; margin: 4px 0 2px; }
.wheel-sub { color: var(--text-dim); font-size: 15px; margin-bottom: 16px; }

.badge-row { display: flex; gap: 8px; flex-wrap: wrap; margin: 14px 0; }

/* --------------------------------------------------------------------------
   Pipeline (cómo piensa el Tonalizador)
   -------------------------------------------------------------------------- */

.song-picker { display: flex; flex-wrap: wrap; gap: 9px; margin-bottom: 24px; }

.song-pill {
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-dim);
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 600;
  padding: 8px 15px;
  transition: all 0.2s;
}

.song-pill[aria-pressed="true"] {
  background: rgba(139, 124, 255, 0.16);
  border-color: var(--acc);
  color: var(--text);
  box-shadow: 0 0 14px rgba(139, 124, 255, 0.3);
}

.pipeline { display: grid; gap: 12px; position: relative; }

.station {
  display: grid;
  grid-template-columns: 46px 1fr auto;
  gap: 16px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  background: rgba(0, 0, 0, 0.22);
  transition: border-color 0.4s, background 0.4s, opacity 0.4s, transform .4s;
  opacity: 0.45;
}

.station.active {
  opacity: 1;
  border-color: var(--acc);
  background: rgba(139, 124, 255, 0.08);
  transform: scale(1.012);
  box-shadow: 0 0 30px rgba(139, 124, 255, 0.15);
}

.station.done { opacity: 0.85; border-color: rgba(74, 222, 128, 0.35); }
.station.skipped { opacity: 0.4; }
.station.failed { opacity: 0.85; border-color: rgba(251, 191, 36, 0.4); }

.station .icon {
  width: 46px; height: 46px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.06);
  font-size: 21px;
}

.station .name { font-weight: 700; font-size: 15.5px; }
.station .desc { font-size: 13.5px; color: var(--text-faint); }
.station .status { font-size: 13px; font-weight: 600; text-align: right; min-width: 110px; }

.travel-dot {
  position: absolute;
  left: 22px;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--acc-2);
  box-shadow: 0 0 14px var(--acc-2);
  z-index: 3;
  transition: top 0.7s cubic-bezier(0.5, 0, 0.3, 1), opacity .3s;
  opacity: 0;
}

.result-card {
  margin-top: 22px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: linear-gradient(160deg, rgba(139, 124, 255, 0.1), rgba(76, 201, 240, 0.05));
  padding: 20px 24px;
  display: none;
}

.result-card.show { display: block; animation: pop-in 0.5s cubic-bezier(0.2, 0.9, 0.3, 1.2); }

@keyframes pop-in {
  from { opacity: 0; transform: translateY(14px) scale(0.97); }
  to { opacity: 1; transform: none; }
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 14px;
  margin-top: 14px;
}

.result-item .lbl { font-size: 11.5px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-faint); }
.result-item .val { font-size: 17px; font-weight: 700; margin-top: 2px; }
.result-item .val.big { font-size: 22px; font-family: var(--font-display); }

/* --------------------------------------------------------------------------
   Laboratorio acústico
   -------------------------------------------------------------------------- */

.lab-stage { display: grid; gap: 20px; }

.lab-canvas-wrap {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(0, 0, 0, 0.35);
  overflow: hidden;
  position: relative;
}

.lab-canvas-wrap .cap {
  position: absolute;
  top: 10px; left: 14px;
  font-size: 11.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
  z-index: 2;
}

#lab-wave, #lab-chroma, #lab-rank { width: 100%; height: 150px; display: block; }
#lab-rank { height: 230px; }

.lab-steps { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 4px; }

.lab-step {
  font-size: 12.5px;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--text-faint);
  transition: all 0.3s;
}

.lab-step.on { border-color: var(--acc); color: var(--text); background: rgba(139, 124, 255, 0.12); }

.confidence-panel { display: none; margin-top: 6px; }
.confidence-panel.show { display: block; animation: pop-in 0.45s ease; }

.meter { margin: 12px 0; }
.meter .row { display: flex; justify-content: space-between; font-size: 13.5px; margin-bottom: 5px; }
.meter .row .w { color: var(--text-faint); font-family: var(--font-mono); font-size: 12px; }
.meter .track {
  height: 8px;
  background: rgba(255, 255, 255, 0.07);
  border-radius: 99px;
  overflow: hidden;
}
.meter .fill {
  height: 100%;
  width: 0;
  border-radius: 99px;
  background: var(--grad);
  transition: width 1s cubic-bezier(0.2, 0.7, 0.2, 1);
}

.verdict {
  margin-top: 18px;
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  border: 1px solid;
}
.verdict.ok { border-color: rgba(74, 222, 128, 0.4); background: rgba(74, 222, 128, 0.07); color: #c9f7d8; }
.verdict.warn { border-color: rgba(251, 191, 36, 0.4); background: rgba(251, 191, 36, 0.07); color: #fde9b8; }

/* --------------------------------------------------------------------------
   Anatomía del resultado
   -------------------------------------------------------------------------- */

.anatomy {
  display: grid;
  grid-template-columns: minmax(280px, 420px) 1fr;
  gap: 30px;
  align-items: start;
}

@media (max-width: 860px) { .anatomy { grid-template-columns: 1fr; } }

.song-card {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.02));
  padding: 22px;
  position: sticky;
  top: 80px;
}

@media (max-width: 860px) { .song-card { position: static; } }

.song-card .t { font-weight: 700; font-size: 18px; }
.song-card .a { color: var(--text-dim); font-size: 14px; margin-bottom: 16px; }

.hotspot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  width: 100%;
  text-align: left;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 10px;
  padding: 9px 12px;
  color: var(--text);
  font-size: 14.5px;
  transition: background 0.2s, border-color 0.2s;
}

.hotspot .k { color: var(--text-faint); font-size: 12.5px; letter-spacing: 0.06em; text-transform: uppercase; }
.hotspot .v { font-weight: 650; }
.hotspot:hover { background: rgba(255, 255, 255, 0.05); }
.hotspot.sel { border-color: var(--acc); background: rgba(139, 124, 255, 0.12); }

.anatomy-detail {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px 26px;
  background: var(--panel);
  min-height: 240px;
}

.anatomy-detail h4 { margin: 0 0 10px; font-size: 18px; font-family: var(--font-display); }
.anatomy-detail p { color: var(--text-dim); font-size: 15px; margin: 0 0 10px; }

/* --------------------------------------------------------------------------
   Comparador de progresiones / casos ambiguos
   -------------------------------------------------------------------------- */

.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

@media (max-width: 760px) { .compare-grid { grid-template-columns: 1fr; } }

.compare-col {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
  background: rgba(0, 0, 0, 0.22);
}

.compare-col h4 { margin: 0 0 6px; font-size: 16px; }
.compare-col .sub { font-size: 13px; color: var(--text-faint); margin-bottom: 12px; }

.mini-bars { display: flex; align-items: flex-end; gap: 4px; height: 90px; margin: 12px 0; }
.mini-bars .b {
  flex: 1;
  border-radius: 4px 4px 0 0;
  min-height: 2px;
  transition: height 0.6s cubic-bezier(0.2, 0.7, 0.2, 1);
}

.modulation-timeline { margin-top: 18px; }
.mod-scroller { overflow-x: auto; padding-bottom: 4px; }
.mod-scroll-hint { display: none; }
@media (max-width: 660px) {
  .mod-scroll-hint {
    display: block;
    margin: 6px 0 0;
    text-align: center;
    font-size: 12px;
    color: var(--text-dim);
  }
}

.mod-track {
  display: flex;
  height: 66px;
  min-width: 520px;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--line-strong);
}

.mod-seg {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  padding: 4px 2px;
  line-height: 1.15;
  color: #0b0c16;
  transition: filter 0.2s, box-shadow 0.2s;
  cursor: pointer;
  border: none;
  position: relative;
}
.mod-seg .ms-name { font-size: 12.5px; font-weight: 800; }
.mod-seg .ms-key { font-size: 10.5px; font-weight: 600; opacity: 0.78; }
.mod-seg:hover { filter: brightness(1.18); }

/* Separador entre tramos: si no, dos tramos con la MISMA tonalidad
   (mismo color) se funden en uno y no se pueden contar. */
.mod-seg + .mod-seg { border-left: 1px solid rgba(0, 0, 0, 0.3); }

/* Y donde la canción se muda, la costura se marca: la mudanza se ve
   en la propia línea de tiempo, sin tener que pulsar nada. */
.mod-seg.moved { border-left: 3px dashed rgba(12, 10, 20, 0.72); }
.mod-seg.moved::before {
  content: "🚚";
  position: absolute;
  top: 3px;
  left: 4px;
  font-size: 11px;
  line-height: 1;
  filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.55));
}

/* Tramo seleccionado: anillo blanco interior, visible sobre cualquier color. */
.mod-seg.on {
  filter: brightness(1.28);
  box-shadow: inset 0 0 0 3px rgba(255, 255, 255, 0.92), 0 0 22px rgba(255, 255, 255, 0.28);
  z-index: 1;
}

/* ---- Ficha del tramo que se está escuchando ---- */

.mod-now {
  margin-top: 14px;
  min-height: 132px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.03);
}
.mod-idle { margin: 0; color: var(--text-dim); font-size: 14px; }
.mod-now-head { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; margin: 0 0 6px; }
.mod-now-n {
  font-size: 11px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text-dim); border: 1px solid var(--line); border-radius: 999px; padding: 2px 9px;
}
.mod-now-head strong { font-size: 19px; }
.mod-now-key { margin: 0 0 8px; font-size: 15px; }
.mod-now-cam {
  font-family: var(--font-mono); font-size: 12px; font-weight: 700;
  border: 1px solid var(--line-strong); border-radius: 6px; padding: 1px 7px; margin-left: 6px;
}
.mod-now-move { margin: 0 0 8px; }
.mod-move { font-size: 13px; font-weight: 700; }
.mod-move.go { color: var(--warm, #ffb86b); }
.mod-move.stay { color: var(--text-dim); }
.mod-move.start { color: var(--text-dim); }
.mod-now-say { margin: 0; font-size: 14.5px; line-height: 1.6; color: var(--text-dim); }
.mod-now-say b { color: var(--text); }

/* ---- La comparación que da sentido al experimento (siempre visible) ---- */

.mod-global {
  margin-top: 14px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--warm, #ffb86b);
  border-radius: 12px;
  background: rgba(255, 184, 107, 0.05);
}
.mod-g-line { margin: 0 0 6px; font-size: 15px; }
.mod-g-key {
  display: inline-block; font-weight: 800; color: var(--warm, #ffb86b);
  border: 1px solid rgba(255, 184, 107, 0.45); border-radius: 8px; padding: 2px 10px; margin-left: 2px;
}
.mod-g-why { margin: 10px 0 0; font-size: 14px; line-height: 1.6; color: var(--text-dim); }
.mod-g-why b { color: var(--text); }

@media (max-width: 560px) {
  .mod-now-head strong { font-size: 17px; }
  .mod-g-key { margin-top: 4px; }
}

/* --------------------------------------------------------------------------
   Guía de pasos (Exportar / Analizar / Descargar)
   -------------------------------------------------------------------------- */

.steps {
  counter-reset: paso;
  display: grid;
  gap: 18px;
}

.step {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  background: var(--panel);
  transition: border-color 0.3s;
}

.step:hover { border-color: var(--line-strong); }

.step .num {
  counter-increment: paso;
  width: 58px; height: 58px;
  display: grid;
  place-items: center;
  border-radius: 16px;
  background: var(--grad);
  color: #0a0b14;
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 700;
}

.step .num::before { content: counter(paso); }

.step h4 { margin: 4px 0 8px; font-size: 19px; font-family: var(--font-display); }
.step p { margin: 0 0 8px; color: var(--text-dim); font-size: 15px; }
.step ul { margin: 8px 0 0; padding-left: 18px; color: var(--text-dim); font-size: 14.5px; }
.step li { margin-bottom: 5px; }
.step li::marker { color: var(--acc-2); }

/* Capturas reales de la herramienta (manual de usuario) */

.shot { margin: 22px 0 8px; }

.shot img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-strong);
  box-shadow: 0 12px 44px rgba(0, 0, 0, 0.5);
}

.shot figcaption {
  font-size: 13.5px;
  color: var(--text-dim);
  line-height: 1.65;
  margin-top: 10px;
}

.shot .fig-num {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--acc-2);
  border: 1px solid rgba(76, 201, 240, 0.4);
  border-radius: 999px;
  padding: 1px 9px;
  margin-right: 8px;
}

/* --------------------------------------------------------------------------
   Misión guiada (visor interactivo de la app real)
   -------------------------------------------------------------------------- */

/* El panel de la misión rompe el ancho de columna: pantalla casi completa */
#tour-panel {
  width: min(96vw, 1720px);
  margin-left: calc((100% - min(96vw, 1720px)) / 2);
  padding: clamp(12px, 1.6vw, 22px);
  scroll-margin-top: 66px;
}

#tour-panel .panel-title { margin-bottom: 12px; }

.tour-hud {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 10px 12px;
  border: 1px solid rgba(255, 184, 107, 0.4);
  border-radius: var(--radius-sm);
  background: linear-gradient(110deg, rgba(255, 184, 107, 0.1), rgba(139, 124, 255, 0.08));
}

.hud-msg { font-size: 12.5px; color: var(--text-dim); line-height: 1.5; }
.hud-msg b { color: var(--text); }
.hud-msg b.ok { color: var(--ok); }
.hud-msg b.bad { color: var(--bad); }

.hud-board { display: flex; align-items: center; gap: 7px; flex-wrap: wrap; }

.hud-stat {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12.5px;
  font-weight: 700;
  padding: 4px 11px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: rgba(0, 0, 0, 0.3);
}
.hud-stat b { font-size: 14px; }

.hud-actions { display: flex; gap: 7px; flex-wrap: wrap; }
.hud-ctl { flex: 1 1 140px; justify-content: center; padding: 6px 10px; font-size: 12.5px; }
.hud-ctl.danger {
  border-color: var(--bad);
  background: rgba(248, 113, 113, 0.16);
  color: #ffd2d2;
}

/* Pantalla completa: la captura ocupa el monitor entero */
#tour-panel:fullscreen,
#tour-panel:-webkit-full-screen {
  width: 100vw;
  max-width: none;
  margin: 0;
  padding: 14px 18px;
  background: var(--bg);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  /* «safe» evita la trampa clásica: con justify-content:center, si el contenido
     no cabe, se desborda TAMBIÉN por arriba y esa parte queda inalcanzable. */
  justify-content: center;
  justify-content: safe center;
  border-radius: 0;
}

#tour-panel:fullscreen .panel-title,
#tour-panel:-webkit-full-screen .panel-title { display: none; }

#tour-panel:fullscreen .tour-body,
#tour-panel:-webkit-full-screen .tour-body {
  grid-template-columns: minmax(0, calc((100vh - 40px) * 1.3617)) minmax(300px, 440px);
}
.hud-stat.ok { color: var(--ok); border-color: rgba(74, 222, 128, 0.4); }
.hud-stat.bad { color: var(--bad); border-color: rgba(248, 113, 113, 0.4); }
.hud-stat.pts { color: var(--warm); border-color: rgba(255, 184, 107, 0.5); }
.hud-stat.bump { animation: hud-bump 0.45s cubic-bezier(0.2, 0.9, 0.3, 1.4); }

@keyframes hud-bump { 30% { transform: scale(1.14); } }

.tour-final[hidden] { display: none; }

/* Diploma: tarjeta SOBRE el tablero. Al vivir fuera del flujo no puede
   estirar la columna ni empujar la captura fuera de la pantalla. */
.tour-final {
  /* fixed, no absolute: el tablero puede ser más alto que la pantalla, y
     centrarse dentro de él dejaría la tarjeta fuera de la vista. */
  position: fixed;
  inset: 0;
  z-index: 60;
  display: grid;
  place-items: center;
  padding: 16px;
  background: rgba(7, 8, 15, 0.84);
  backdrop-filter: blur(7px);
  -webkit-backdrop-filter: blur(7px);
  border-radius: var(--radius-sm);
  animation: pop-in 0.4s cubic-bezier(0.2, 0.9, 0.3, 1.1);
}

.tf-card {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  flex-wrap: wrap;
  width: min(560px, 100%);
  max-height: 100%;
  overflow-y: auto;
  padding: 20px 22px;
  border: 1px solid rgba(74, 222, 128, 0.5);
  border-radius: var(--radius);
  background: linear-gradient(120deg, rgba(74, 222, 128, 0.14), rgba(76, 201, 240, 0.1)), var(--bg-soft, #12141f);
  box-shadow: var(--shadow);
  font-size: 14.5px;
  color: var(--text-dim);
}
.tf-card strong { color: var(--text); font-size: 17px; }
.tf-card .tf-emoji { font-size: 38px; line-height: 1; }
.tf-card .tf-text { flex: 1; min-width: 220px; }

.tf-close {
  position: absolute;
  top: 8px;
  right: 10px;
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 16px;
  line-height: 1;
  padding: 4px 6px;
  cursor: pointer;
  border-radius: 6px;
}
.tf-close:hover { color: var(--text); background: rgba(255, 255, 255, 0.08); }

.tf-back {
  margin-top: 12px;
  background: none;
  border: none;
  padding: 0;
  color: var(--text-dim);
  font-family: inherit;
  font-size: 12.5px;
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
}
.tf-back:hover { color: var(--text); }

.hud-ctl.gold { border-color: rgba(255, 184, 107, 0.55); color: var(--warm); }

.tf-diploma {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
  align-items: center;
}

.tf-diploma input {
  flex: 1 1 190px;
  min-width: 0;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--text);
  font-family: inherit;
  font-size: 13.5px;
  padding: 9px 15px;
}
.tf-diploma input::placeholder { color: var(--text-faint); }
.tf-diploma input:focus { outline: none; border-color: var(--acc); background: rgba(0, 0, 0, 0.5); }
.tf-diploma .btn { font-size: 13.5px; padding: 9px 15px; }

.tf-hint {
  margin: 8px 0 0;
  font-size: 12.5px;
  color: var(--warm);
  opacity: 0.95;
}
.tf-hint[hidden] { display: none; }

.tour-head { display: grid; gap: 8px; }

.tour-title { font-weight: 700; font-size: 15px; line-height: 1.35; }
.tour-title .n { color: var(--acc-2); font-family: var(--font-mono); font-size: 12px; margin-right: 8px; }

.tour-progress { display: flex; gap: 6px; flex-wrap: wrap; }

.tour-progress button {
  width: 24px; height: 24px;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-faint);
  font-size: 11.5px;
  font-weight: 700;
  display: grid;
  place-items: center;
  transition: all 0.2s;
  padding: 0;
}

.tour-progress button.cur { border-color: var(--acc); background: rgba(139, 124, 255, 0.2); color: var(--text); transform: scale(1.12); }
.tour-progress button.done { border-color: rgba(74, 222, 128, 0.6); color: var(--ok); }

/* Invitación a jugar a pantalla completa (cuando el navegador pide un gesto) */
.fs-invite {
  position: absolute;
  inset: 0;
  z-index: 8;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(7, 8, 15, 0.82);
  backdrop-filter: blur(7px);
  -webkit-backdrop-filter: blur(7px);
  border-radius: var(--radius-sm);
  animation: pop-in 0.35s cubic-bezier(0.2, 0.9, 0.3, 1.1);
}

.fs-card {
  max-width: 460px;
  text-align: center;
  border: 1px solid rgba(255, 184, 107, 0.45);
  border-radius: var(--radius);
  background: linear-gradient(120deg, rgba(255, 184, 107, 0.12), rgba(139, 124, 255, 0.1));
  padding: 22px 26px;
  box-shadow: var(--shadow);
}

.fs-card .fs-t { margin: 0 0 8px; font-size: 17px; font-weight: 700; color: var(--text); }
.fs-card .fs-d { margin: 0 0 16px; font-size: 13.5px; color: var(--text-dim); line-height: 1.55; }
.fs-card kbd {
  font-family: var(--font-mono);
  font-size: 12px;
  border: 1px solid var(--line-strong);
  border-bottom-width: 2px;
  border-radius: 5px;
  padding: 1px 6px;
  background: rgba(0, 0, 0, 0.4);
}
.fs-actions { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }

.tour-body {
  position: relative;
  display: grid;
  /* La imagen manda: su columna nunca supera el ancho que da una altura de pantalla completa */
  grid-template-columns: minmax(0, calc((100svh - 150px) * 1.3617)) minmax(290px, 430px);
  gap: 16px;
  align-items: start;
  justify-content: center;
}

@media (max-width: 900px) { .tour-body { grid-template-columns: 1fr; } }

.tour-stage {
  position: relative;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--line-strong);
  box-shadow: 0 12px 44px rgba(0, 0, 0, 0.5);
  aspect-ratio: 2560 / 1880;
  background: #0a0b14;
  width: 100%;
}

.tour-side { display: grid; gap: 10px; align-content: start; }

/* Ronda final: el escenario deja de ser imagen y pasa a ser panel de preguntas */
.tour-stage.finals {
  aspect-ratio: auto;
  overflow: visible;
  background: transparent;
  border: none;
  box-shadow: none;
}

.finals-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 12px;
}

.final-card { background: rgba(0, 0, 0, 0.24); }
.final-card.solved { border-color: rgba(74, 222, 128, 0.45); background: rgba(74, 222, 128, 0.05); }

/* Opciones plegadas: la pregunta ocupa poco hasta que decides responder */
.opts-fold { margin-top: 4px; }

.opts-fold summary {
  list-style: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.05);
  border-radius: 999px;
  padding: 7px 14px;
  transition: background 0.2s, border-color 0.2s;
}

.opts-fold summary::-webkit-details-marker { display: none; }
.opts-fold summary::after { content: "▾"; font-size: 11px; transition: transform 0.25s; }
.opts-fold[open] summary::after { transform: rotate(180deg); }
.opts-fold summary:hover { background: rgba(255, 255, 255, 0.1); border-color: var(--acc); }
.opts-fold[open] summary { border-color: var(--acc); background: rgba(139, 124, 255, 0.14); }
.opts-fold .opts { margin-top: 10px; animation: pop-in 0.3s ease; }

.tour-intro {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 12px 15px;
  background: rgba(0, 0, 0, 0.24);
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.55;
}

.tour-intro .cnt { color: var(--acc-2); font-weight: 700; }

/* Globo anclado al punto pulsado, sobre la propia captura */
.hs-callout {
  position: absolute;
  z-index: 6;
  pointer-events: none;
  width: min(320px, 86%);
  background: rgba(10, 12, 24, 0.97);
  border: 1px solid var(--acc);
  border-radius: 12px;
  padding: 12px 14px;
  box-shadow: 0 16px 50px rgba(0, 0, 0, 0.65), 0 0 0 4px rgba(139, 124, 255, 0.12);
  animation: pop-in 0.25s cubic-bezier(0.2, 0.8, 0.3, 1.1);
}

.hs-callout .ct { font-weight: 700; font-size: 13.5px; margin: 0 22px 5px 0; color: var(--text); }
.hs-callout .cd { font-size: 12.8px; line-height: 1.55; color: var(--text-dim); margin: 0; }
.hs-callout .cx {
  pointer-events: auto;
  position: absolute;
  top: 6px; right: 6px;
  width: 24px; height: 24px;
  border: none;
  border-radius: 7px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-dim);
  font-size: 13px;
  line-height: 1;
  display: grid;
  place-items: center;
}
.hs-callout .cx:hover { background: rgba(255, 255, 255, 0.16); color: var(--text); }

.tour-stage img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  animation: tour-fade 0.45s ease;
}

@keyframes tour-fade { from { opacity: 0; transform: scale(1.015); } to { opacity: 1; transform: none; } }

/* Lupa: amplía la captura bajo el cursor sin bloquear los puntos */
.tour-lens {
  position: absolute;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.8);
  box-shadow: 0 12px 44px rgba(0, 0, 0, 0.65), inset 0 0 14px rgba(0, 0, 0, 0.45);
  pointer-events: none;
  z-index: 4;
  display: none;
  background-repeat: no-repeat;
  background-color: #0a0b14;
}

.tour-lens.on { display: block; }

.hs {
  position: absolute;
  z-index: 5;
  width: 30px; height: 30px;
  margin: -15px 0 0 -15px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.85);
  background: rgba(139, 124, 255, 0.42);
  box-shadow: 0 0 0 0 rgba(139, 124, 255, 0.55);
  animation: hs-pulse 2.2s ease-out infinite;
  cursor: pointer;
  padding: 0;
  transition: background 0.2s, transform 0.2s;
}

.hs:hover { transform: scale(1.2); background: rgba(139, 124, 255, 0.75); }

.hs.visited { animation: none; background: rgba(76, 201, 240, 0.45); border-color: rgba(76, 201, 240, 0.9); box-shadow: none; }
.hs.sel { background: var(--warm); border-color: #fff; animation: none; transform: scale(1.25); box-shadow: 0 0 18px rgba(255, 184, 107, 0.8); }
.hs.correct { background: var(--ok); border-color: #fff; animation: none; transform: scale(1.4); box-shadow: 0 0 24px rgba(74, 222, 128, 0.9); }

@keyframes hs-pulse {
  0% { box-shadow: 0 0 0 0 rgba(139, 124, 255, 0.55); }
  70% { box-shadow: 0 0 0 16px rgba(139, 124, 255, 0); }
  100% { box-shadow: 0 0 0 0 rgba(139, 124, 255, 0); }
}

.tour-reto {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  background: rgba(0, 0, 0, 0.24);
}

.tour-reto h5 {
  margin: 0 0 8px;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--warm);
}

.tour-reto p { margin: 0; font-size: 13.5px; color: var(--text-dim); line-height: 1.55; }

.tour-reto .q { color: var(--text); font-weight: 600; margin-bottom: 10px; }

.tour-reto .opts { display: grid; gap: 8px; }

.tour-reto .opt {
  text-align: left;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  border-radius: 9px;
  padding: 9px 12px;
  font-size: 13.5px;
  transition: all 0.2s;
}
.tour-reto .opt:hover { border-color: var(--acc); }
.tour-reto .opt.right { border-color: var(--ok); background: rgba(74, 222, 128, 0.1); }
.tour-reto .opt.wrong { border-color: var(--bad); background: rgba(248, 113, 113, 0.1); }

.tour-reto .expl { display: none; margin-top: 10px; font-size: 13.5px; border-left: 2px solid var(--ok); padding-left: 10px; }
.tour-reto .expl.show { display: block; animation: pop-in 0.4s ease; }

.tour-reto.solved { border-color: rgba(74, 222, 128, 0.45); background: rgba(74, 222, 128, 0.05); }

.tour-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.tour-score { font-size: 13.5px; color: var(--text-dim); width: 100%; text-align: center; order: 3; }

/* Enlace de salida hacia «La chuleta»: solo visible en la ronda final */
.tour-continue {
  width: 100%;
  background: none;
  border: none;
  padding: 4px 0 0;
  color: var(--text-dim);
  font-family: inherit;
  font-size: 13px;
  text-align: center;
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
}
.tour-continue:hover { color: var(--text); }
.tour-continue[hidden] { display: none; }
.tour-score strong { color: var(--ok); }

#tour-gallery.tour-hidden { display: none; }

.states-list { display: grid; gap: 14px; margin-top: 6px; }

.state-row {
  display: grid;
  grid-template-columns: 170px 1fr;
  gap: 14px;
  align-items: start;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding-bottom: 14px;
}

.state-row:last-child { border-bottom: none; padding-bottom: 0; }

.state-row p { margin: 0; font-size: 14.5px; color: var(--text-dim); }

@media (max-width: 640px) { .state-row { grid-template-columns: 1fr; gap: 6px; } }

.zip-tree {
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.9;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 18px 22px;
  color: var(--text-dim);
  overflow-x: auto;
}
.zip-tree .f { color: var(--acc-2); }
.zip-tree .warn-f { color: var(--warn); }

/* --------------------------------------------------------------------------
   Ejemplos famosos
   -------------------------------------------------------------------------- */

.famous-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 12px;
}

.famous-card {
  display: flex;
  align-items: center;
  gap: 13px;
  text-align: left;
  border: 1px solid var(--line-strong);
  background: rgba(0, 0, 0, 0.24);
  border-radius: var(--radius-sm);
  padding: 13px 15px;
  color: var(--text);
  transition: border-color 0.2s, background 0.2s, transform 0.2s;
}
.famous-card:hover { border-color: var(--acc); transform: translateY(-2px); }
.famous-card.sel { border-color: var(--warm); background: rgba(255, 184, 107, 0.09); }

.fc-disc {
  width: 46px; height: 46px;
  flex: none;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 14px;
  color: #0b0c16;
  border: 2px solid rgba(255, 255, 255, 0.25);
}
.famous-card.sel .fc-disc { animation: spin 9s linear infinite; }

.fc-body { display: grid; gap: 1px; min-width: 0; }
.fc-t { font-weight: 700; font-size: 14.5px; }
.fc-a { font-size: 12.5px; color: var(--text-faint); }
.fc-k { font-size: 12.5px; color: var(--text-dim); font-family: var(--font-mono); }

.famous-desk {
  margin-top: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(0, 0, 0, 0.24);
  padding: 16px 18px;
}

.desk-now { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.desk-now .btn { margin-left: auto; }

.desk-list { display: grid; gap: 8px; margin: 16px 0 12px; }

.desk-row {
  display: grid;
  grid-template-columns: 54px minmax(120px, 1.1fr) minmax(150px, 1.6fr) auto;
  gap: 10px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 9px 12px;
  font-size: 13.5px;
}
.desk-row.ok { border-color: rgba(74, 222, 128, 0.35); background: rgba(74, 222, 128, 0.05); }
.desk-row.far { opacity: 0.72; }
.dr-name { font-weight: 650; }
.dr-verdict { color: var(--text-dim); font-size: 13px; }

@media (max-width: 720px) {
  .desk-row { grid-template-columns: 54px 1fr; }
  .dr-verdict { grid-column: 1 / -1; }
  .desk-row .btn { grid-column: 1 / -1; justify-content: center; }
}

.four-chords {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 12px;
}

.fchord {
  border: 1px solid var(--line-strong);
  border-left: 4px solid var(--c);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  background: rgba(0, 0, 0, 0.24);
  transition: transform 0.25s, background 0.25s, box-shadow 0.25s;
}
.fchord.on {
  transform: translateY(-5px);
  background: rgba(255, 255, 255, 0.09);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
}

.fch-rn { display: block; font-family: var(--font-mono); font-size: 12px; color: var(--acc-2); letter-spacing: 0.1em; }
.fch-name { display: block; font-family: var(--font-display); font-size: 26px; margin: 2px 0; }
.fch-mode { display: block; font-size: 12px; color: var(--text-faint); }

/* --------------------------------------------------------------------------
   Juego Camelot + Quiz
   -------------------------------------------------------------------------- */

.game-now {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.now-disc {
  width: 74px; height: 74px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 19px;
  color: #0b0c16;
  animation: spin 9s linear infinite;
  border: 3px solid rgba(255,255,255,.25);
}

@keyframes spin { to { transform: rotate(360deg); } }

.game-feedback { margin-top: 14px; font-size: 14.5px; color: var(--text-dim); min-height: 24px; }

/* --------------------------------------------------------------------------
   Cabina de DJ · sesión encadenada (Experimento 6)
   -------------------------------------------------------------------------- */

.dj-disc { cursor: pointer; padding: 0; font-family: inherit; }
.dj-disc:hover { filter: brightness(1.12); }
.dj-disc:disabled { cursor: default; }
.dj-disc.playing, .dj-opt.playing { box-shadow: 0 0 0 4px rgba(139, 124, 255, 0.4); }

.dj-rows { display: grid; gap: 10px; margin-top: 6px; }
.dj-row { display: grid; grid-template-columns: 24px 1fr; gap: 10px; align-items: stretch; }
.dj-row-tag { display: grid; place-items: center; font-size: 12px; font-weight: 700; color: var(--text-faint); }
.dj-row-opts { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }

.dj-opt {
  position: relative;
  display: flex;
  align-items: stretch;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-sm);
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
}
.dj-opt:hover { border-color: var(--acc); background: rgba(139, 124, 255, 0.08); }
.dj-cell {
  flex: 1;
  min-width: 0;
  text-align: left;
  background: none;
  border: 0;
  color: var(--text);
  padding: 10px 8px 10px 12px;
  cursor: pointer;
  font-family: inherit;
}
.dj-cell:disabled { cursor: default; }
.dj-cell .code { display: block; font-weight: 800; font-size: 16px; }
.dj-cell .nm { display: block; font-size: 12px; color: var(--text-dim); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.dj-check {
  display: grid;
  place-items: center;
  padding: 0 9px;
  cursor: pointer;
  border-left: 1px dashed var(--line-strong);
}
.dj-check input { position: absolute; opacity: 0; pointer-events: none; }
.dj-box {
  width: 18px; height: 18px;
  border-radius: 5px;
  border: 2px solid var(--line-strong);
  display: grid; place-items: center;
  font-size: 12px; line-height: 1;
  color: #0b0c16;
  transition: all 0.15s;
}
.dj-check:hover .dj-box { border-color: var(--acc); }
.dj-check input:checked + .dj-box { background: var(--acc); border-color: var(--acc); }
.dj-check input:checked + .dj-box::after { content: "✓"; font-weight: 900; }
.dj-check input:focus-visible + .dj-box { outline: 2px solid var(--acc); outline-offset: 2px; }
.dj-check input:disabled + .dj-box { opacity: 0.45; }
.dj-opt.selected { border-color: var(--acc); background: rgba(139, 124, 255, 0.12); }

/* Boca abajo: la casilla aún no se ha destapado */
.dj-opt.facedown {
  background: repeating-linear-gradient(135deg, rgba(255, 255, 255, 0.02) 0 8px, rgba(255, 255, 255, 0.05) 8px 16px);
}
.dj-opt.facedown::before {
  content: "?";
  position: absolute; inset: 0;
  display: grid; place-items: center;
  font-weight: 800; font-size: 18px;
  color: var(--text-faint);
}
.dj-opt.facedown .dj-cell,
.dj-opt.facedown .dj-check { visibility: hidden; }

/* Volteo tipo panel de aeropuerto */
@keyframes dj-flap { 0% { transform: scaleY(1); } 50% { transform: scaleY(0.68); } 100% { transform: scaleY(1); } }
.dj-opt.flipping { animation: dj-flap 0.14s linear infinite; }
.dj-opt.flipping .dj-check { visibility: hidden; }
.dj-disc.flipping { animation: spin 9s linear infinite, dj-flap 0.14s linear infinite; }

.dj-opt.right { border-color: var(--ok); background: rgba(74, 222, 128, 0.12); }
.dj-opt.wrong { border-color: var(--bad); background: rgba(248, 113, 113, 0.12); }

@media (max-width: 680px) {
  .dj-row { grid-template-columns: 18px 1fr; gap: 8px; }
  .dj-row-opts { grid-template-columns: repeat(2, 1fr); gap: 8px; }
}

.quiz-q { margin-bottom: 8px; font-weight: 650; font-size: 16.5px; }
.quiz-opts { display: grid; gap: 9px; margin-bottom: 14px; }
.quiz-opt {
  text-align: left;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  border-radius: 10px;
  padding: 11px 14px;
  font-size: 14.5px;
  transition: all 0.2s;
}
.quiz-opt:hover { border-color: var(--acc); }
.quiz-opt.right { border-color: var(--ok); background: rgba(74, 222, 128, 0.1); }
.quiz-opt.wrong { border-color: var(--bad); background: rgba(248, 113, 113, 0.1); }
.quiz-expl { font-size: 14px; color: var(--text-dim); border-left: 2px solid var(--acc); padding-left: 12px; margin: 10px 0 4px; display: none; }
.quiz-expl.show { display: block; animation: pop-in 0.4s ease; }
.quiz-score { font-family: var(--font-display); font-size: 22px; margin-top: 18px; }

/* --------------------------------------------------------------------------
   Tarjetas volteables (errores frecuentes)
   -------------------------------------------------------------------------- */

.flip-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 16px;
}

/* Volteo compatible con todos los navegadores: las dos caras comparten la
   misma celda de grid (la tarjeta mide siempre como la cara más alta) y el
   giro se sugiere con un pliegue 2D + fundido, sin transformaciones 3D. */

.flip {
  display: grid;
  cursor: pointer;
  min-height: 190px;
  border-radius: var(--radius-sm);
  -webkit-tap-highlight-color: transparent;
}

.flip-face {
  grid-row: 1;
  grid-column: 1;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-strong);
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
  transition: opacity 0.4s ease, transform 0.4s cubic-bezier(0.3, 0.7, 0.3, 1);
}

.flip-front {
  background: rgba(248, 113, 113, 0.06);
  border-color: rgba(248, 113, 113, 0.3);
  opacity: 1;
  transform: none;
}
.flip-front .myth { font-weight: 700; font-size: 15.5px; }
.flip-front .cta { font-size: 12px; color: var(--text-faint); letter-spacing: 0.08em; text-transform: uppercase; }

.flip-back {
  background: rgba(74, 222, 128, 0.07);
  border-color: rgba(74, 222, 128, 0.3);
  opacity: 0;
  transform: scale(0.96) translateY(8px);
  pointer-events: none;
  visibility: hidden;
}
.flip-back p { margin: 0; font-size: 14px; color: var(--text-dim); }
.flip-back .truth { font-weight: 700; color: var(--ok); font-size: 13px; letter-spacing: 0.08em; text-transform: uppercase; }

.flip.flipped .flip-front {
  opacity: 0;
  transform: scale(0.96) translateY(-8px);
  pointer-events: none;
  visibility: hidden;
}
.flip.flipped .flip-back {
  opacity: 1;
  transform: none;
  pointer-events: auto;
  visibility: visible;
}

/* Las caras ocultas siguen ocupando su celda para fijar la altura,
   pero no deben leerse ni enfocarse mientras están invisibles. */
.flip-face { transition-property: opacity, transform, visibility; }

.flip:hover .flip-face { border-color: rgba(255, 255, 255, 0.35); }
.flip:focus-visible { outline: 2px solid var(--acc-2); outline-offset: 3px; }

/* --------------------------------------------------------------------------
   Aplicaciones
   -------------------------------------------------------------------------- */

.apps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.app-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  background: var(--panel);
  transition: transform 0.25s, border-color 0.25s, box-shadow .25s;
}

.app-card:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.4);
}

.app-card .emoji { font-size: 28px; margin-bottom: 10px; }
.app-card h4 { margin: 0 0 8px; font-size: 17px; font-family: var(--font-display); }
.app-card p { margin: 0; font-size: 14.5px; color: var(--text-dim); }
.app-card .who { display: inline-block; margin-top: 12px; font-size: 12px; color: var(--acc-2); letter-spacing: 0.06em; text-transform: uppercase; font-weight: 700; }

/* --------------------------------------------------------------------------
   Matching demo
   -------------------------------------------------------------------------- */

.match-case {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
  margin-bottom: 14px;
  background: rgba(0, 0, 0, 0.2);
}

.match-case .q { font-size: 15px; margin-bottom: 4px; }
.match-case .q .mono { color: var(--acc-2); }
.match-case .vs { color: var(--text-faint); font-size: 13.5px; margin-bottom: 12px; }
.match-case .expl { display: none; margin-top: 12px; font-size: 14px; color: var(--text-dim); border-left: 2px solid var(--acc); padding-left: 12px; }
.match-case .expl.show { display: block; animation: pop-in 0.4s ease; }

/* --------------------------------------------------------------------------
   Footer / conclusión
   -------------------------------------------------------------------------- */

.finale {
  text-align: center;
  padding-bottom: 40px;
}

.finale .prose { margin: 0 auto; }

.finale h2 { max-width: none; }

.cta-final {
  margin: 44px auto 0;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

/* --------------------------------------------------------------------------
   Epílogo: la constelación que se convierte en pregunta
   -------------------------------------------------------------------------- */

.epilogue {
  position: relative;
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) 1.1fr;
  gap: 34px;
  align-items: center;
  min-height: 86vh;
  margin: 70px auto 20px;
  text-align: left;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  padding: 50px 0;
}

#epilogue-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.ep-glyph-space { min-height: 480px; position: relative; z-index: 0; pointer-events: none; }

.epilogue-inner {
  position: relative;
  z-index: 1;
  max-width: 56ch;
  padding-right: 8px;
}

.ep-kicker {
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--warm);
  margin: 0 0 26px;
}

.ep-line {
  font-family: var(--font-display);
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.6;
  color: var(--text-dim);
  margin: 0 0 22px;
  padding-left: 18px;
  border-left: 1px solid rgba(255, 184, 107, 0.35);
}

.ep-line strong { color: var(--text); font-weight: 600; }

.ep-question {
  font-family: var(--font-display);
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1.3;
  color: var(--text);
  margin: 40px 0 18px;
}

.ep-question .grad {
  background: linear-gradient(92deg, var(--warm), var(--acc), var(--acc-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.ep-hint { font-size: 13.5px; color: var(--text-faint); margin: 0; }

@media (max-width: 900px) {
  .epilogue { grid-template-columns: 1fr; min-height: 0; gap: 0; }
  .ep-glyph-space { min-height: 340px; }
  .epilogue-inner { max-width: none; padding: 0 4px; }
}

/* --------------------------------------------------------------------------
   Glosario flotante
   -------------------------------------------------------------------------- */

.gloss {
  border: none;
  background: none;
  padding: 0;
  font: inherit;
  color: inherit;
  cursor: help;
  border-bottom: 1px dashed rgba(76, 201, 240, 0.6);
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.gloss:hover, .gloss.open {
  color: var(--acc-2);
  border-bottom-color: var(--acc-2);
  background: rgba(76, 201, 240, 0.08);
}

.gloss-pop {
  position: fixed;
  z-index: 70;
  background: rgba(12, 14, 26, 0.98);
  border: 1px solid rgba(76, 201, 240, 0.5);
  border-radius: 13px;
  padding: 14px 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.65);
  animation: pop-in 0.22s cubic-bezier(0.2, 0.8, 0.3, 1.1);
}
.gloss-pop[hidden] { display: none; }
.gloss-pop strong { display: block; color: var(--acc-2); font-size: 13.5px; margin-bottom: 5px; }
.gloss-pop p { margin: 0; font-size: 13.5px; line-height: 1.55; color: var(--text-dim); }

/* Glosario completo, desde la cabecera */

.gloss-menu { width: min(420px, calc(100vw - 24px)); padding: 0; }

.gm-head {
  position: sticky;
  top: 0;
  z-index: 2;
  background: rgba(12, 14, 26, 0.99);
  padding: 11px 12px;
  border-bottom: 1px solid var(--line);
}

#gloss-filter {
  width: 100%;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--text);
  font-family: inherit;
  font-size: 13.5px;
  padding: 8px 14px;
}
#gloss-filter::placeholder { color: var(--text-faint); }
#gloss-filter:focus { outline: none; border-color: var(--acc-2); }

.gm-list { margin: 0; padding: 4px 14px 8px; }

.gm-item {
  padding: 10px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.gm-item:last-child { border-bottom: none; }
.gm-item[hidden] { display: none; }
.gm-item dt { font-weight: 700; font-size: 13.5px; color: var(--acc-2); }
.gm-item dd { margin: 3px 0 0; font-size: 12.8px; color: var(--text-dim); line-height: 1.5; }

.gm-empty { margin: 0; padding: 18px 16px; font-size: 13px; color: var(--text-faint); text-align: center; }
.gm-empty[hidden] { display: none; }

.gm-foot {
  margin: 0;
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-size: 11.5px;
  color: var(--text-faint);
  text-align: center;
}

footer.colophon {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 40px 24px 60px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--text-faint);
  font-size: 13.5px;
  text-align: center;
  line-height: 1.9;
}

/* --------------------------------------------------------------------------
   Detalles finos
   -------------------------------------------------------------------------- */

.divider-act {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 60px 24px 0;
  text-align: center;
}

.divider-act .act-label {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.divider-act .act-label::before, .divider-act .act-label::after {
  content: "";
  width: 60px;
  height: 1px;
  background: var(--line-strong);
}

.divider-act h2 {
  margin: 14px auto 0;
  max-width: none;
  font-size: clamp(24px, 3.4vw, 34px);
  color: var(--text-dim);
  font-weight: 500;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  border: 0;
}

.skip-link {
  position: absolute;
  left: 10px; top: -60px;
  z-index: 100;
  background: var(--acc);
  color: #0a0b14;
  font-weight: 700;
  padding: 10px 18px;
  border-radius: 10px;
  transition: top 0.2s;
}
.skip-link:focus { top: 12px; }

/* --------------------------------------------------------------------------
   La bifurcación de portada: dos puertas, la misma casa
   -------------------------------------------------------------------------- */

.fork { padding: 10px 24px 90px; }

.fork-inner { max-width: var(--maxw); margin: 0 auto; }

.fork-q {
  font-family: var(--font-display);
  font-size: clamp(24px, 2.8vw, 32px);
  color: var(--text);
  text-align: center;
  margin: 0 0 6px;
}

.fork-hint {
  color: var(--text-faint);
  font-size: 14.5px;
  text-align: center;
  margin: 0 0 28px;
}

.doors {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

@media (max-width: 820px) { .doors { grid-template-columns: 1fr; } }

.door {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 26px 26px 22px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--panel-strong);
  color: inherit;
  transition: transform 0.18s, border-color 0.2s, box-shadow 0.25s;
}

.door:hover { transform: translateY(-3px); box-shadow: var(--shadow); text-decoration: none; }

.door::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  opacity: 0.6;
  pointer-events: none;
  background: linear-gradient(150deg, var(--door-tint, transparent), transparent 55%);
}

.door > * { position: relative; }

.door-fast { --door-tint: rgba(255, 184, 107, 0.12); border-color: rgba(255, 184, 107, 0.30); }
.door-fast:hover { border-color: rgba(255, 184, 107, 0.55); }
.door-deep { --door-tint: rgba(139, 124, 255, 0.14); border-color: rgba(139, 124, 255, 0.30); }
.door-deep:hover { border-color: rgba(139, 124, 255, 0.60); }

.door-icon { font-size: 30px; line-height: 1; }

.door-kicker {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.door-name {
  font-family: var(--font-display);
  font-weight: 560;
  font-size: clamp(26px, 3vw, 34px);
  line-height: 1.05;
  margin: -4px 0 0;
}

.door-fast .door-name { color: var(--warm); }

.door-deep .door-name {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.door-quote { font-family: var(--font-display); font-size: 18px; color: var(--text); margin: 0; }

.door-what { color: var(--text-dim); font-size: 15.5px; line-height: 1.65; margin: 0; }

.door-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 2px; }

.door-chip {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-dim);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  border-radius: 999px;
  padding: 4px 11px;
  white-space: nowrap;
}

.door-go {
  margin-top: auto;
  padding-top: 14px;
  font-weight: 700;
  font-size: 15px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.door-fast .door-go { color: var(--warm); }
.door-deep .door-go { color: var(--acc-2); }

.door-go .arrow { transition: transform 0.18s; }
.door:hover .door-go .arrow { transform: translateX(4px); }

.fork-foot {
  margin: 22px 0 0;
  color: var(--text-faint);
  font-size: 14px;
  text-align: center;
}

/* El puente de vuelta: invitación al viaje desde el final de la misión */

.tf-bridge {
  width: 100%;
  margin: 14px 0 0;
  padding: 12px 16px;
  border: 1px solid rgba(255, 184, 107, 0.28);
  border-radius: var(--radius-sm);
  background: linear-gradient(120deg, rgba(255, 184, 107, 0.08), rgba(139, 124, 255, 0.07));
  font-size: 13.5px;
  color: var(--text-dim);
}

.tf-bridge strong { color: var(--text); font-size: 13.5px; }

.tf-bridge .btn { margin-top: 10px; font-size: 13px; padding: 8px 15px; }