/* ==========================================================================
   TALLER ATLAS — Base: tokens, reset, tipografía, estructura general
   Paleta ATLAS (#050A12 · #081522 · #0A1520 · cian #00D4FF · dorado #C8A45C)
   Tipografías de las pantallas Stitch V02: Playfair Display / Space Grotesk / JetBrains Mono
   Título de la portada: DM Serif Display, la misma letra del «ATLAS» del portal
   ========================================================================== */
:root {
  --bg: #050a12;
  --surface: #081522;
  --card: #0a1520;
  --card-2: #0c1a28;
  --border: #142334;
  --border-2: #1b2d42;
  --border-subtle: #0e1e2e;
  --text: #e0e8f0;
  --muted: #7a8fa3;
  --dim: #70859a;   /* contraste ≥ 4,5:1 sobre fondos y tarjetas (WCAG AA) */
  --cyan: #00d4ff;
  --cyan-soft: rgba(0, 212, 255, .14);
  --cyan-line: rgba(0, 212, 255, .32);
  --gold: #c8a45c;
  --gold-soft: rgba(200, 164, 92, .12);
  --danger: #f87171;
  --danger-soft: rgba(248, 113, 113, .1);
  --ok: #4fd1a5;
  --serif: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --brand: 'DM Serif Display', 'Playfair Display', Georgia, serif;
  --sans: 'Space Grotesk', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, 'Cascadia Mono', Consolas, monospace;
  --r-sm: 4px;
  --r-md: 10px;
  --r-lg: 14px;
  --r-xl: 18px;
  --ease: cubic-bezier(.2, .7, .2, 1);
  --shadow-lift: 0 10px 34px rgba(0, 0, 0, .42);
  --maxw: 1280px;
  --gutter: clamp(16px, 3vw, 32px);
  --knob: #00d4ff;          /* interruptor claro/oscuro */
  --on-knob: #003642;
  --map-bg: #060d17;        /* mapa: fondo y colores de los elementos */
  --map-line: #00d4ff;
  --map-point: #c8a45c;
  --map-point-ring: #f4e3bd;
  --map-ref: #c8a45c;
  color-scheme: dark;
}
/* El modo claro (opcional, con el interruptor de la barra superior) está en styles/theme-light.css */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
body::before {               /* profundidad controlada: halo superior muy sutil */
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(60% 40% at 50% -6%, rgba(0, 212, 255, .07), transparent 70%),
    radial-gradient(40% 30% at 92% 4%, rgba(200, 164, 92, .045), transparent 70%);
}
::selection { background: rgba(0, 212, 255, .22); color: #fff; }
img, svg, canvas { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4, p { margin: 0; }
[hidden] { display: none !important; }
.ico { flex: none; }

:focus-visible { outline: 2px solid var(--cyan); outline-offset: 2px; border-radius: 4px; }

.skip {
  position: absolute; left: 12px; top: -48px; z-index: 100;
  background: var(--cyan); color: var(--bg); padding: 8px 14px; border-radius: 8px;
  font-family: var(--mono); font-size: 12px;
}
.skip:focus { top: 12px; }

/* ---------- Barra superior (Stitch: ATLAS / TALLER · Volver a ATLAS) ---------- */
.topbar {
  position: sticky; top: 0; z-index: 40;
  background: rgba(5, 10, 18, .86);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-subtle);
}
.topbar__in {
  max-width: var(--maxw); margin: 0 auto; height: 64px;
  padding: 0 var(--gutter);
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.brand { display: inline-flex; align-items: center; gap: 9px; font-family: var(--mono); font-size: 13px; letter-spacing: .1em; }
.brand__atlas { color: var(--text); font-weight: 600; }
.brand__sep { color: rgba(122, 143, 163, .45); font-size: 12px; }
.brand__taller { color: var(--cyan); font-weight: 500; }
.topbar__right { display: flex; align-items: center; gap: 18px; }
.back-atlas, .back-link {
  display: inline-flex; align-items: center; gap: 7px;
  font-family: var(--mono); font-size: 12px; color: var(--muted);
  transition: color .2s var(--ease);
}
.back-atlas:hover, .back-link:hover { color: var(--text); }
.back-atlas .ico, .back-link .ico { transition: transform .2s var(--ease); }
.back-atlas:hover .ico, .back-link:hover .ico { transform: translateX(-3px); }

/* Interruptor claro/oscuro: el mismo control del tablero ATLAS (preferencia compartida «atlasModo») */
.modewrap { display: flex; align-items: center; gap: 8px; font-family: var(--mono); font-size: 10px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.modesw { position: relative; flex: none; width: 52px; height: 28px; padding: 0; border-radius: 999px; border: 1px solid var(--border-2); background: var(--card-2); display: inline-flex; align-items: center; justify-content: space-between; cursor: pointer; }
.modesw svg { position: relative; z-index: 1; width: 14px; height: 14px; margin: 0 6px; color: var(--muted); transition: color .18s; }
.modesw .knob { position: absolute; top: 2px; left: 2px; width: 22px; height: 22px; border-radius: 50%; background: var(--knob); transform: translateX(24px); transition: transform .18s ease, background .18s; }
.modesw .moon { color: var(--on-knob); }                       /* oscuro (por defecto): luna activa */
:root[data-mode="light"] .modesw .knob { transform: none; }
:root[data-mode="light"] .modesw .moon { color: var(--muted); }
:root[data-mode="light"] .modesw .sun { color: var(--on-knob); }
.modesw:hover { border-color: var(--cyan-line); }
.modewrap > span::before { content: "Oscuro"; }
:root[data-mode="light"] .modewrap > span::before { content: "Claro"; }

.session-btn {
  display: inline-flex; align-items: center; gap: 8px;
  height: 32px; padding: 0 12px; border-radius: 999px;
  border: 1px solid var(--border-2); background: rgba(10, 21, 32, .7);
  font-family: var(--mono); font-size: 11.5px; color: var(--muted);
  transition: border-color .2s, color .2s;
}
.session-btn:hover { color: var(--text); border-color: var(--cyan-line); }
.session-btn b { color: var(--bg); background: var(--cyan); border-radius: 999px; font-weight: 600; min-width: 18px; height: 18px; display: inline-grid; place-items: center; font-size: 10.5px; padding: 0 5px; }

/* ---------- Contenido y pie ---------- */
.main { position: relative; z-index: 1; flex: 1; width: 100%; }
.page { max-width: var(--maxw); margin: 0 auto; padding: 36px var(--gutter) 72px; }
/* Aviso de arranque: solo se ve si los módulos no llegaron a cargarse (p. ej. al abrir con doble clic). */
.boot-fallback { opacity: 0; animation: boot-show .3s ease 2.5s forwards; }
@keyframes boot-show { to { opacity: 1; } }
.footer { position: relative; z-index: 1; border-top: 1px solid var(--border-subtle); background: var(--bg); }
.footer__in {
  max-width: var(--maxw); margin: 0 auto; padding: 22px var(--gutter);
  display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  font-family: var(--mono); font-size: 11.5px; color: var(--muted);
}
.footer__brand { color: var(--text); font-weight: 600; letter-spacing: .1em; }

/* ---------- Tipografía de página ---------- */
.crumbs { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; font-family: var(--mono); font-size: 11.5px; letter-spacing: .08em; color: var(--muted); text-transform: uppercase; }
.crumbs i { font-style: normal; color: #2c3e50; }
.crumbs b { font-weight: 500; color: var(--cyan); }
.crumbs a:hover { color: var(--text); }
.crumbs--tool b { color: var(--text); }
.page-title { font-family: var(--serif); font-weight: 500; font-size: clamp(30px, 4vw, 40px); line-height: 1.12; letter-spacing: -.01em; color: var(--text); }
.page-desc { color: var(--muted); font-size: 15px; margin-top: 8px; max-width: 640px; }
.eyebrow { font-family: var(--mono); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.mono { font-family: var(--mono); }
.muted { color: var(--muted); }
.dim { color: var(--dim); }
.gold { color: var(--gold); }
.cyan { color: var(--cyan); }
.nowrap { white-space: nowrap; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* Aparición suave */
@keyframes rise { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }
.reveal { animation: rise .7s var(--ease) both; animation-delay: calc(var(--d, 0) * 90ms); }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}

@media (max-width: 640px) {
  .topbar__in { height: 56px; }
  .back-atlas span { display: none; }
  .modewrap > span { display: none; }
  .session-btn span { display: none; }
  .page { padding-top: 24px; }
}