/* ════════════════════════════════════════════════════════════════════
   Win'Event — layout.css
   Conteneurs, sections (alternance encre/craie), grilles, révélations.
   ════════════════════════════════════════════════════════════════════ */

@layer layout {

  /* ── Conteneurs ─────────────────────────────────────────────────── */
  .container      { width: var(--container);      margin-inline: auto; }
  .container--wide { width: var(--container-wide); margin-inline: auto; }
  .container--text { width: var(--container-text); margin-inline: auto; }

  /* ── Sections & alternance de fonds ─────────────────────────────── */
  .section {
    position: relative;
    padding-block: var(--section-y);
  }
  .section--ink {
    background-color: var(--ink);
    color: var(--on-ink);
  }
  .section--chalk {
    background-color: var(--chalk);
    color: var(--graphite);
  }
  .section--ink h1, .section--ink h2, .section--ink h3 { color: var(--on-ink); }

  /* Petite respiration en haut de contenu après le header fixe */
  .section--flush-top { padding-top: clamp(6.5rem, 5rem + 6vw, 10rem); }

  /* ── En-tête de section ─────────────────────────────────────────── */
  .section-head {
    max-width: 46ch;
    margin-bottom: clamp(2rem, 1.4rem + 2vw, 3.5rem);
  }
  .section-head--center { margin-inline: auto; text-align: center; max-width: 52ch; }
  /* Le texte sous un titre au pinceau ne doit pas chevaucher le trait doré */
  .section-head .brush-title + .lead { margin-top: clamp(1.25rem, 0.8rem + 2vw, 2rem); }

  .eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-family: var(--font-body);
    font-weight: 500;
    font-size: var(--fs-eyebrow);
    letter-spacing: var(--ls-eyebrow);
    text-transform: uppercase;
    color: var(--bronze);
    margin-bottom: 1rem;
  }
  .section--ink .eyebrow { color: var(--champagne); }
  .eyebrow::before {
    content: "";
    width: 1.6rem; height: 2px;
    background: var(--grad-gold);
    border-radius: 2px;
  }

  .lead {
    font-size: var(--fs-lead);
    line-height: 1.5;
    color: inherit;
    max-width: 54ch;
  }
  .section--ink .lead { color: var(--on-ink-mut); }
  .section--chalk .muted { color: var(--on-chalk-mut); }

  /* ── Flux vertical (rythme) ─────────────────────────────────────── */
  .flow > * + * { margin-top: var(--flow-space, 1.1em); }

  /* ── Grilles ────────────────────────────────────────────────────── */
  .grid { display: grid; gap: var(--gutter); }
  .grid--2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 22rem), 1fr)); }
  .grid--3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr)); }
  .split {
    display: grid;
    gap: clamp(2rem, 1rem + 4vw, 5rem);
    align-items: center;
  }
  @media (min-width: 768px) {
    .split { grid-template-columns: 1fr 1fr; }
    .split--wide-left  { grid-template-columns: 1.2fr 0.8fr; }
    .split--wide-right { grid-template-columns: 0.85fr 1.15fr; }
  }

  /* ── Séparateur : le coup de pinceau doré (élément signature) ───── */
  .brush-divider {
    display: block;
    width: min(320px, 60%);
    height: 22px;
    margin: 0 auto;
    background: var(--grad-gold);
    -webkit-mask: url("../svg/brush.svg") no-repeat center / 100% 100%;
    mask: url("../svg/brush.svg") no-repeat center / 100% 100%;
    opacity: 0.9;
  }
  .brush-divider--left { margin-inline: 0; }

  /* ── Révélations au scroll (transform + opacity uniquement) ─────── */
  [data-reveal] {
    opacity: 0;
    transform: translateY(22px);
    transition:
      opacity var(--dur-reveal) var(--ease-out),
      transform var(--dur-reveal) var(--ease-out);
    transition-delay: var(--reveal-delay, 0ms);
    will-change: opacity, transform;
  }
  [data-reveal].is-revealed {
    opacity: 1;
    transform: none;
  }
  /* Variante « montée douce » pour les listes échelonnées */
  [data-reveal="fade"] { transform: none; }

  @media (prefers-reduced-motion: reduce) {
    [data-reveal] { opacity: 1 !important; transform: none !important; }
  }

  /* ── Utilitaires d'espacement de section ────────────────────────── */
  .stack-lg { display: grid; gap: clamp(2rem, 1.2rem + 3vw, 4rem); }
}

@layer utilities {
  /* Délais échelonnés des révélations (remplacent les styles inline) */
  .rd-1 { --reveal-delay: 90ms; }
  .rd-2 { --reveal-delay: 180ms; }
  .rd-3 { --reveal-delay: 270ms; }
  .rd-4 { --reveal-delay: 360ms; }

  /* Marges verticales ponctuelles */
  .mt-2 { margin-top: 1rem; }
  .mt-3 { margin-top: 1.5rem; }
  .mt-4 { margin-top: 2rem; }
  .mt-6 { margin-top: 2.5rem; }

  .measure-32 { max-width: 32ch; }

  /* Variantes de rythme des sections « bandeau » */
  .section--tight-top    { padding-top: clamp(2.5rem, 2rem + 3vw, 4.5rem); }
  .section--tight-bottom { padding-bottom: clamp(2rem, 1.5rem + 2vw, 3.5rem); }

  .footer-bottom--bare { border-top: none; margin-top: 0; }
}