/*
 * Socle : remise à zéro, ciels d'ambiance, grain, apparitions, bouton son.
 *
 * Invariant : les ciels sont superposés et seul celui qui correspond à
 * html[data-mood] est opaque. On ne fait varier que l'opacité, ce qui
 * garde les transitions fluides.
 */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  color-scheme: dark;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: #0e0b10;
  color: var(--ink);
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-optical-sizing: auto;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

body.is-locked {
  overflow: hidden;
}

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

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
}

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

[hidden] {
  display: none !important;
}

main {
  position: relative;
  z-index: 1;
}

.eyebrow {
  margin: 0 0 var(--space-s);
  font-family: var(--font-mono);
  font-size: var(--text-small);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
}

/* ── Ciels d'ambiance ─────────────────────────────────────────────────────── */
.sky,
.sky__layer {
  position: fixed;
  inset: 0;
}

.sky {
  z-index: 0;
  pointer-events: none;
}

.sky__layer {
  opacity: 0;
  transition: opacity var(--duration-slow) ease;
}

.sky__layer--storm {
  background:
    radial-gradient(ellipse 80% 50% at 30% 0%, rgb(90 105 140 / 0.35), transparent 70%),
    linear-gradient(180deg, #0c0f16 0%, #171c28 55%, #222838 100%);
}

/* Éclairs lointains : de rares flashs très brefs. */
.sky__layer--storm::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 70% 10%, rgb(200 215 255 / 0.5), transparent 60%);
  opacity: 0;
  animation: lightning 9s infinite;
}

.sky__layer--dawn {
  background:
    radial-gradient(ellipse 120% 60% at 50% 110%, rgb(240 140 110 / 0.55), transparent 70%),
    linear-gradient(180deg, #160f22 0%, #2e1934 55%, #5b2a45 100%);
}

.sky__layer--light {
  background:
    radial-gradient(ellipse 70% 55% at 75% 15%, rgb(242 194 123 / 0.32), transparent 70%),
    radial-gradient(ellipse 60% 50% at 10% 90%, rgb(255 143 171 / 0.16), transparent 70%),
    linear-gradient(180deg, #24161b 0%, #3a2027 100%);
}

.sky__layer--warm {
  background:
    radial-gradient(ellipse 80% 60% at 50% 30%, rgb(242 170 100 / 0.22), transparent 70%),
    linear-gradient(180deg, #23160f 0%, #36231b 100%);
}

.sky__layer--stars {
  background:
    radial-gradient(ellipse 100% 60% at 50% 100%, rgb(90 70 160 / 0.35), transparent 70%),
    linear-gradient(180deg, #04050b 0%, #0d1130 100%);
}

html:not([data-mood]) .sky__layer--light,
html[data-mood='storm'] .sky__layer--storm,
html[data-mood='dawn'] .sky__layer--dawn,
html[data-mood='light'] .sky__layer--light,
html[data-mood='warm'] .sky__layer--warm,
html[data-mood='stars'] .sky__layer--stars {
  opacity: 1;
}

@keyframes lightning {
  0%, 62%, 64.5%, 66%, 100% { opacity: 0; }
  63% { opacity: 0.9; }
  65% { opacity: 0.5; }
}

/* ── Grain argentique par-dessus tout ─────────────────────────────────────── */
.grain {
  position: fixed;
  inset: -50%;
  z-index: 50;
  pointer-events: none;
  opacity: 0.07;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ── Apparitions au défilement ────────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition:
    opacity var(--duration-slow) var(--ease-out-expo),
    transform var(--duration-slow) var(--ease-out-expo);
}

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

/* ── Photo manquante (pendant la préparation) ─────────────────────────────── */
.photo-missing {
  display: grid;
  place-content: center;
  gap: 0.25rem;
  min-height: 12rem;
  padding: var(--space-s);
  background: repeating-linear-gradient(-45deg, #3a2a2a, #3a2a2a 10px, #332424 10px, #332424 20px);
  border: 1px dashed var(--ink-muted);
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: var(--text-small);
  text-align: center;
}

/* ── Bouton son ───────────────────────────────────────────────────────────── */
.sound-toggle {
  position: fixed;
  right: var(--space-m);
  bottom: var(--space-m);
  z-index: 40;
  padding: 0.55rem 1rem;
  border: 1px solid rgb(246 236 225 / 0.3);
  border-radius: 999px;
  background: rgb(14 11 16 / 0.6);
  backdrop-filter: blur(8px);
  font-family: var(--font-mono);
  font-size: var(--text-small);
  letter-spacing: 0.08em;
  transition: border-color var(--duration-fast), background var(--duration-fast);
}

.sound-toggle:hover {
  border-color: var(--gold);
}

.sound-toggle[aria-pressed='true'] {
  color: var(--ink-muted);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition-duration: 1ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}