/* ============================================================
   El Umbral Sereno — capa de interfaz compartida
   Reset sereno, primitivas, botones, placeholder fotográfico,
   accesibilidad (foco visible, áreas táctiles 48px, reduced-motion).
   Depende de umbral-base.css (tokens + fuentes).
   ============================================================ */

*,*::before,*::after{box-sizing:border-box}
*{margin:0;padding:0}
html{
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  -webkit-text-size-adjust:100%;scroll-behavior:smooth;
}
body{
  font-family:var(--sans);font-weight:400;
  color:var(--texto);background:var(--cream-base);
  line-height:var(--lh-body);font-size:var(--fs-body);
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}

/* Voz del linaje (serif) */
.serif{font-family:var(--serif)}
/* Heroes / títulos grandes (sans, decisión 2026-06-07) */
.hero-type{font-family:var(--sans);font-weight:300;letter-spacing:-.025em;line-height:1.06;color:var(--tinta)}

/* Kicker dorado en versalitas — hilo de linaje (uso de --oro permitido) */
.kicker{
  font-family:var(--sans);font-weight:500;font-size:.72rem;
  letter-spacing:.2em;text-transform:uppercase;color:var(--oro);
  display:inline-flex;align-items:center;gap:var(--space-2);
}

/* ── Botones ──────────────────────────────────────────────
   .btn-sobrio  → azul Sofrocay, acción primaria general (CTA de venta, navegación)
   .btn-oro     → DORADO, EXCLUSIVO del acto de práctica ("Comenzar la práctica")
   .btn-fantasma→ contorno tenue, acción secundaria
   Área táctil mínima 48px. */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:var(--space-3);
  min-height:48px;padding:0 var(--space-6);border-radius:var(--r-full);
  font-family:var(--sans);font-weight:500;font-size:1rem;letter-spacing:.005em;
  transition:background var(--dur-suave) var(--ease),box-shadow var(--dur-suave) var(--ease),transform var(--dur-rapida) var(--ease),color var(--dur-suave) var(--ease);
  text-align:center;
}
.btn svg{width:18px;height:18px;flex:none}
.btn-sobrio{background:var(--sof-700);color:#fff;box-shadow:0 2px 10px -4px rgba(15,33,64,.4)}
.btn-sobrio:hover{background:var(--sof-900)}
.btn-oro{background:var(--oro);color:#3c2f17;box-shadow:0 6px 18px -8px rgba(201,169,110,.75)}
.btn-oro:hover{background:var(--oro-hover)}
.btn-fantasma{background:transparent;color:var(--sof-700);box-shadow:inset 0 0 0 1px rgba(48,91,145,.28)}
.btn-fantasma:hover{box-shadow:inset 0 0 0 1px rgba(48,91,145,.55);background:rgba(48,91,145,.04)}
.btn-bloque{display:flex;width:100%}

@media (hover:none){
  .btn:active{transform:scale(.98)}
}
:focus-visible{outline:2.5px solid var(--sof-400);outline-offset:3px;border-radius:4px}

/* ── Placeholder fotográfico art-dirigido ──
   Para huecos sin foto real: NO es una caja gris, es una superficie
   cálida con luz de ventana, grano sutil, un icono de trazo fino y
   una nota de la foto editorial real que debe ir ahí. */
.foto{position:relative;overflow:hidden;background:var(--cream-warm)}
.foto>img{width:100%;height:100%;object-fit:cover}
.ph{
  position:relative;overflow:hidden;
  background:
    radial-gradient(125% 90% at 78% 12%, rgba(255,251,242,.95), rgba(255,251,242,0) 58%),
    radial-gradient(120% 120% at 12% 96%, rgba(48,91,145,.12), rgba(48,91,145,0) 56%),
    linear-gradient(158deg,#f6ecd7 0%,#efe3cd 48%,#e6d9c1 100%);
}
.ph::after{ /* grano fino */
  content:"";position:absolute;inset:0;opacity:.5;mix-blend-mode:multiply;pointer-events:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.06'/%3E%3C/svg%3E");
}
.ph-ico{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:38px;height:38px;stroke:rgba(48,91,145,.4);fill:none;stroke-width:1.3;stroke-linecap:round;stroke-linejoin:round}
.ph-cap{
  position:absolute;left:12px;bottom:11px;right:12px;
  font-size:.68rem;line-height:1.35;font-style:italic;color:var(--sof-700);
  background:rgba(254,253,251,.72);backdrop-filter:blur(3px);
  padding:5px 9px;border-radius:8px;border:1px solid rgba(48,91,145,.12);
}

/* ── Accesibilidad ── */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link{position:absolute;left:8px;top:-44px;z-index:1000;background:var(--sof-700);color:#fff;padding:10px 16px;border-radius:var(--r-sm);transition:top var(--dur-suave) var(--ease)}
.skip-link:focus{top:8px}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
}