/* ==========================================================================
   ELEDJI — Intro (page d'accueil uniquement)
   Trois temps : particules → cœur → "MODE" → logo. Une fois par session
   (sessionStorage), ignorée si prefers-reduced-motion. Voir js/intro.js.
   ========================================================================== */

.intro {
  position: fixed;
  inset: 0;
  z-index: var(--z-intro);
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-obsidian);
  transition: opacity 600ms var(--ease-standard), visibility 600ms;
}

.intro.is-leaving {
  opacity: 0;
}

.intro.is-hidden {
  visibility: hidden;
  pointer-events: none;
}

.intro__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  transition: opacity 500ms var(--ease-standard);
}

.intro.is-canvas-fading .intro__canvas {
  opacity: 0;
}

.intro__logo {
  position: relative;
  z-index: 1;
  opacity: 0;
  transform: scale(0.88);
  transition: opacity 640ms var(--ease-out-expo), transform 640ms var(--ease-out-expo);
}

.intro__logo .logo {
  gap: var(--space-3);
}

.intro__logo .logo__mark {
  height: clamp(36px, 7vw, 56px);
}

.intro__logo .logo__fallback-text {
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  letter-spacing: 0.04em;
}

.intro.is-logo-visible .intro__logo {
  opacity: 1;
  transform: scale(1);
}

.intro__skip {
  position: absolute;
  right: var(--space-5);
  bottom: max(var(--space-5), env(safe-area-inset-bottom));
  z-index: 2;
  color: var(--text-on-dark-secondary);
  font-size: var(--fs-small);
  letter-spacing: var(--ls-wide);
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--border-on-dark);
  border-radius: var(--radius-pill);
  background: transparent;
  opacity: 0;
  transition: opacity 400ms var(--ease-standard), border-color 200ms var(--ease-standard), color 200ms var(--ease-standard);
}

.intro.is-skip-visible .intro__skip {
  opacity: 1;
}

.intro__skip:hover {
  color: var(--text-on-dark-primary);
  border-color: var(--color-champagne);
}

@media (prefers-reduced-motion: reduce) {
  .intro {
    transition: none;
  }
}