/* Hero à séquence · scroll-scrubbing façon Apple (canvas natif, 80 frames WebP)
 * Fond blanc. Titre en haut · objectif centré · chapitres sous l'objectif (Capturer / Construire / Diffuser).
 */

body { background: var(--ink); }

.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }

.seq { position: relative; height: 170vh; background: var(--white); }
.seq__stage { position: sticky; top: 0; height: 100vh; height: 100dvh; overflow: hidden; background: var(--white); display: grid; grid-template-rows: auto minmax(0, 1fr) auto; align-items: center; justify-items: center; padding: clamp(5.5rem, 9vh, 7rem) var(--gutter) clamp(2rem, 5vh, 3.5rem); row-gap: clamp(0.75rem, 2.5vh, 2rem); }
.seq__canvas { grid-row: 2; width: 100%; height: 100%; display: block; }

/* Titre en haut, centré */
/* Titre en haut (dégage le menu) ; l'objectif se cale ensuite juste dessous via JS */
.seq__top { grid-row: 1; max-width: var(--page); text-align: center; pointer-events: none; }
.seq__eyebrow { font-family: var(--font-mono); font-size: 0.84rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent); }
.seq__title { margin-top: 0.75rem; font-family: var(--font-display); font-weight: 500; font-size: clamp(2.5rem, 6.5vw, 4.8rem); letter-spacing: -0.02em; line-height: 1.02; color: var(--fg); }

/* Chapitres sous l'objectif, centrés · mouvement franc */
.seq__chapters { grid-row: 3; display: flex; flex-direction: column; align-items: center; gap: clamp(0.35rem, 1.4vh, 0.9rem); text-align: center; pointer-events: none; }
.seq__chapter { opacity: 0; transform: translateY(30px); transition: opacity 0.45s ease, transform 0.5s cubic-bezier(0.2, 1.04, 0.3, 1); }
.seq__chapter.is-on { opacity: 1; transform: none; }
.seq__verb { font-family: var(--font-display); font-style: italic; font-weight: 400; color: var(--copper); font-size: clamp(1.7rem, 3.8vw, 2.6rem); line-height: 1; letter-spacing: -0.01em; }
.seq__ch-text { margin-top: 0.35rem; font-size: clamp(0.98rem, 1.4vw, 1.2rem); line-height: 1.4; color: var(--fg); max-width: 44ch; margin-inline: auto; }


.seq__cta { position: absolute; left: 50%; bottom: clamp(1.75rem, 5vh, 3.25rem); z-index: 3; transform: translate(-50%, 18px); opacity: 0; pointer-events: none; transition: opacity 0.45s var(--spring), transform 0.45s var(--spring); }
.seq__cta.is-on { opacity: 1; transform: translate(-50%, 0); pointer-events: auto; }

.seq__hint { position: absolute; left: 0; right: 0; bottom: 1.5rem; z-index: 2; display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted-2); transition: opacity 0.4s ease; }

/* Accessibilité : pas de scrub, tout s'affiche en un bloc statique lisible */
@media (prefers-reduced-motion: reduce) {
  .seq { height: auto; }
  .seq__stage { position: static; height: auto; display: block; padding-block: clamp(4.5rem, 10vw, 6.5rem); }
  .seq__canvas { height: min(56vh, 76vw); margin: 1rem auto 1.5rem; }
  .seq__chapter { opacity: 1; transform: none; padding-block: 0.6rem; }
  .seq__cta { position: relative; left: auto; bottom: auto; transform: none; opacity: 1; pointer-events: auto; margin: 1.75rem auto 0; display: inline-flex; }
  .seq__hint { display: none; }
}

/* ---- Contenu de la home (blanc) ---- */
.home-lead { padding-block: clamp(4rem, 9vw, 6.5rem); }
.home-lead__eyebrow { display: inline-flex; align-items: center; gap: 0.6em; font-family: var(--font-mono); font-size: 0.84rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent); }
.home-lead__eyebrow .spark { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }
.home-lead__title { margin-top: 1.25rem; font-family: var(--font-display); font-weight: 500; font-size: clamp(2rem, 5vw, 3.4rem); letter-spacing: -0.02em; line-height: 1.05; max-width: 24ch; }
.home-lead__title .hl { color: var(--copper); font-style: italic; font-weight: 400; }
.home-lead__text { margin-top: 1.5rem; max-width: 60ch; font-size: clamp(1.1rem, 1.6vw, 1.35rem); line-height: 1.6; color: var(--muted); }
.mini-cta { display: inline-flex; align-items: center; gap: 0.45em; margin-top: 1.5rem; font-family: var(--font-mono); font-size: 0.74rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); text-decoration: none; }
.mini-cta .arrow { transition: transform 0.3s var(--spring); }
.mini-cta:hover .arrow { transform: translateX(3px); }