/* LUNA — prototipo local V1. Paleta y estilos compartidos. */

:root {
  --oro: #d4a95a;
  --oro-claro: #e8c98c;
  --agua: #2a8fa0;
  --negro: #16130f;      /* casi-negro cálido */
  --negro-suave: #1e1a15;
  --papel: #f3ead9;      /* blanco roto cálido */
  --papel-tenue: rgba(243, 234, 217, 0.72);
  --serif: 'Iowan Old Style', 'Palatino Linotype', Palatino, Georgia, serif;
  --sans: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

* { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--negro);
  color: var(--papel);
  font-family: var(--serif);
  font-size: 1.06rem;
  line-height: 1.7;
}

a { color: var(--oro-claro); }

:focus-visible {
  outline: 2px solid var(--oro);
  outline-offset: 3px;
}

.btn {
  display: inline-block;
  font-family: var(--sans);
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  text-align: center;
  border-radius: 3px;
  padding: 0.8em 1.6em;
  cursor: pointer;
  transition: background-color 0.2s, color 0.2s;
}

.btn-primario {
  background: var(--oro);
  color: var(--negro);
  border: 1px solid var(--oro);
}
.btn-primario:hover { background: var(--oro-claro); }

.btn-fantasma {
  background: transparent;
  color: var(--papel);
  border: 1px solid var(--papel-tenue);
}
.btn-fantasma:hover { border-color: var(--oro); color: var(--oro-claro); }

/* ============ Portada (index.html) ============ */

.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: center;
  text-align: center;
  padding: 2rem 1.5rem 4rem;
  background: var(--negro) url('../assets/A1V.PNG') center / cover no-repeat;
}

.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(22, 19, 15, 0.15) 0%,
    rgba(22, 19, 15, 0.05) 35%,
    rgba(22, 19, 15, 0.55) 75%,
    rgba(22, 19, 15, 0.9) 100%
  );
  pointer-events: none;
}

.hero > * { position: relative; z-index: 1; }

.hero h1 {
  font-size: clamp(3.2rem, 14vw, 5.5rem);
  font-weight: 400;
  letter-spacing: 0.35em;
  margin: 0 0 0.4em 0.35em; /* compensa el letterspacing final */
}

.hero .subtitulo {
  max-width: 26rem;
  margin: 0 auto 2.2rem;
  font-style: italic;
  color: var(--papel-tenue);
}

.hero .ctas {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  width: 100%;
  max-width: 20rem;
}

/* ============ Secciones portada ============ */

.seccion {
  padding: 3.5rem 1.5rem;
  background: var(--negro);
}

.seccion-interior {
  max-width: 34rem;
  margin: 0 auto;
}

.seccion h2 {
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--oro);
  font-size: 1.35rem;
}

.teaser {
  background: var(--negro-suave);
  border-top: 1px solid rgba(212, 169, 90, 0.25);
  border-bottom: 1px solid rgba(212, 169, 90, 0.25);
}

.form-aviso {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  margin: 1.5rem 0 1rem;
}

.form-aviso input[type='email'] {
  font-family: var(--sans);
  font-size: 1rem;
  padding: 0.8em 1em;
  background: var(--negro-suave);
  color: var(--papel);
  border: 1px solid rgba(243, 234, 217, 0.35);
  border-radius: 3px;
}

.form-aviso input[type='email']:focus-visible {
  border-color: var(--oro);
}

.nota-pequena {
  font-family: var(--sans);
  font-size: 0.8rem;
  color: var(--papel-tenue);
}

.pie {
  padding: 2.5rem 1.5rem 3rem;
  text-align: center;
  font-family: var(--sans);
  font-size: 0.8rem;
  color: var(--papel-tenue);
  border-top: 1px solid rgba(243, 234, 217, 0.12);
}

@media (min-width: 700px) {
  .hero .ctas { flex-direction: row; justify-content: center; max-width: none; }
  .form-aviso { flex-direction: row; }
  .form-aviso input[type='email'] { flex: 1; }
}

/* ============ Lector (leer.html) ============ */

/* Capa de fondo fija: dos imágenes apiladas para el fundido + vídeo */
.fondo {
  position: fixed;
  inset: 0;
  z-index: 0;
  background: var(--negro);
  overflow: hidden;
}

.fondo img,
.fondo video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0;
  transition: opacity 400ms ease;
}

.fondo .capa-visible { opacity: 1; }

/* Sin JS: la primera capa (A1V) queda visible por defecto vía CSS */
.fondo .capa-base { opacity: 1; }

/* Velo para legibilidad AA sobre cualquier imagen */
.velo {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(
    to bottom,
    rgba(22, 19, 15, 0.68) 0%,
    rgba(22, 19, 15, 0.55) 50%,
    rgba(22, 19, 15, 0.68) 100%
  );
}

/* Barra superior */
.barra {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 3;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.6rem 1rem;
  background: rgba(22, 19, 15, 0.65);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  font-family: var(--sans);
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  color: var(--papel-tenue);
}

.barra .titulo-barra {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.btn-sonido {
  font-family: var(--sans);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  background: transparent;
  color: var(--papel-tenue);
  border: 1px solid rgba(243, 234, 217, 0.35);
  border-radius: 3px;
  padding: 0.4em 0.9em;
  cursor: pointer;
  white-space: nowrap;
}
.btn-sonido:hover { border-color: var(--oro); color: var(--oro-claro); }

.aviso-nojs {
  position: relative;
  z-index: 2;
  display: block;
  text-align: center;
  font-family: var(--sans);
  font-size: 0.8rem;
  color: var(--papel-tenue);
  padding: 0.5rem 1rem;
  margin-top: 3rem;
}

/* Columna de texto */
.lector-main {
  position: relative;
  z-index: 2;
}

.capitulo {
  max-width: 34rem;
  margin: 0 auto;
  padding: 5.5rem 1.4rem 3rem;
}

.capitulo p {
  margin: 0 0 1.2em;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
}

.ornamento {
  display: block;
  text-align: center;
  font-size: 1.1rem;
  letter-spacing: 0.3em;
  color: var(--oro);
  margin: 2.5rem 0 2rem;
  font-variant-numeric: normal;
}

.nota-transicion {
  display: block;
  text-align: center;
  font-family: var(--sans);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--papel-tenue);
  border-top: 1px solid rgba(243, 234, 217, 0.18);
  border-bottom: 1px solid rgba(243, 234, 217, 0.18);
  padding: 0.6rem 0;
  margin: 2.5rem 0;
}

/* Centinelas de frontera: invisibles, sin altura de más */
.centinela {
  height: 1px;
}

/* El bloque final debe poder cruzar la banda central del observador de
   bloques (rootMargin -45%/-45%): sin altura mínima, la tarjeta es
   demasiado corta y nunca llega a ser el "bloque activo". */
#bloque-a11 {
  min-height: 65vh;
  display: flex;
  align-items: center;
}

/* Tarjeta final */
.cta-final {
  max-width: 34rem;
  margin: 3rem auto 4rem;
  padding: 2rem 1.5rem;
  text-align: center;
  background: rgba(30, 26, 21, 0.85);
  border: 1px solid rgba(212, 169, 90, 0.35);
  border-radius: 4px;
}

.cta-final h2 {
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--oro);
  font-size: 1.3rem;
  margin-top: 0;
}

.cta-final .ctas {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  max-width: 20rem;
  margin: 1.5rem auto 0;
}

/* Toast del botón de sonido */
.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 4;
  background: rgba(22, 19, 15, 0.92);
  color: var(--papel);
  border: 1px solid rgba(212, 169, 90, 0.4);
  border-radius: 3px;
  font-family: var(--sans);
  font-size: 0.82rem;
  padding: 0.6em 1.2em;
  opacity: 0;
  pointer-events: none;
  transition: opacity 300ms ease;
}
.toast.visible { opacity: 1; }

@media (prefers-reduced-motion: reduce) {
  .fondo img,
  .fondo video,
  .toast {
    transition: none;
  }
}