/* ============================================================
   Revalta by Altus Conseil — design-system/sections/pillars.css
   ------------------------------------------------------------
   Section piliers — 3 (parfois 2 ou 4) engagements / valeurs.
   Squelette idéologique du sujet de la page.

   Class names — CONTRAT FIGÉ (consommé par Claude.ai) :
     .revalta-section-pillars
       .revalta-section-pillars-content
         .revalta-section-pillars-header
           .revalta-section-pillars-eyebrow
           .revalta-section-pillars-title
         .revalta-section-pillars-list
           .revalta-section-pillars-item
             .revalta-section-pillars-numeral       (I, II, III, IV)
             .revalta-section-pillars-item-title
             .revalta-section-pillars-item-lede     (catchphrase courte)
             .revalta-section-pillars-item-body

   Variantes de fond — quatre combinaisons, comme le hero :
     A    .revalta-section-pillars                              papier plat
     B    .revalta-section-pillars[data-revalta-broll]            papier + image
     C-flat .revalta-section-pillars.revalta-section-inverse      marine plat
     C    .revalta-section-pillars.revalta-section-inverse[data-revalta-broll]
                                                              encre + image

   Requiert : colors_and_type.css.
   ============================================================ */

/* ─── Container ────────────────────────────────────────────── */

.revalta-section-pillars {
  position: relative;
  background: var(--revalta-bg);
  color: var(--revalta-fg1);
  font-family: var(--revalta-font);
  font-weight: var(--revalta-w-light);
  isolation: isolate;
  padding-block: clamp(96px, 14vh, 180px);
  padding-inline: var(--revalta-web-pad-x);
}

/* Première section de la page — respiration de 25vh sous le header fixé.
   Voir hero.css pour l'explication détaillée du sélecteur. */
/* .revalta-section-pillars:first-child — compensation globale (body.revalta main > :first-child) */

.revalta-section-pillars-content {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: clamp(64px, 8vh, 96px);
}

/* ─── Header (eyebrow + title) ─────────────────────────────── */

.revalta-section-pillars-header {
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 50vw;
}

.revalta-section-pillars-eyebrow {
  margin: 0;
  font-size: 13px;
  font-weight: var(--revalta-w-medium);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--revalta-accent);
}

.revalta-section-pillars-title {
  margin: 0;
  font-size: clamp(36px, 4.4vw, 64px);
  font-weight: var(--revalta-w-light);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--revalta-fg1);
  text-wrap: balance;
}

/* ─── Liste des piliers ────────────────────────────────────── */

.revalta-section-pillars-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  column-gap: clamp(32px, 4vw, 64px);
  row-gap: 72px;
}
/* Tolérant à 2 ou 4 colonnes selon le nombre d'enfants. */
.revalta-section-pillars-list:has(> :nth-child(4)) { grid-template-columns: repeat(4, 1fr); }
.revalta-section-pillars-list:has(> :nth-child(2):last-child) { grid-template-columns: repeat(2, 1fr); }

.revalta-section-pillars-item {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Numéro romain — grand, Regular 400, bleu encre accent.
   Bleu encre accent — seul usage autorisé en plus de l'eyebrow : marque
   l'ordinal d'un pilier comme un repère typographique, pas un titre.
   Le bleu encre tient sur les deux fonds (papier et encre), donc la
   variante inverse garde la même couleur. */
.revalta-section-pillars-numeral {
  margin: 0 0 16px;
  /* Hairline horizontale 32 px sous le numéral pour rappeler
     la séparation entre identification et propos. */
  padding-bottom: 16px;
  border-bottom: 1px solid var(--revalta-sep);
  width: max-content;
  min-width: 32px;
  font-size: clamp(40px, 4vw, 64px);
  font-weight: var(--revalta-w-light);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--revalta-accent);
  font-variant-numeric: lining-nums;
}

.revalta-section-pillars-item-title {
  margin: 0;
  font-size: clamp(20px, 1.8vw, 26px);
  font-weight: var(--revalta-w-medium);
  line-height: 1.2;
  letter-spacing: -0.005em;
  color: var(--revalta-fg1);
}

.revalta-section-pillars-item-lede {
  margin: 0;
  font-size: clamp(15px, 1.2vw, 17px);
  font-weight: var(--revalta-w-light);
  line-height: 1.4;
  color: var(--revalta-fg2);
}

.revalta-section-pillars-item-body {
  margin: 12px 0 0;
  font-size: clamp(14px, 1vw, 15px);
  font-weight: var(--revalta-w-light);
  line-height: 1.6;
  color: var(--revalta-fg2);
  max-width: 36ch;
  text-wrap: pretty;
}

/* ────────────────────────────────────────────────────────────
   Variante inverse — fond marine (C-flat / C)
   ──────────────────────────────────────────────────────────── */
.revalta-section-pillars.revalta-section-inverse {
  background: var(--revalta-bg-inverse);
  color: var(--revalta-fg1-inverse);
}
.revalta-section-pillars.revalta-section-inverse .revalta-section-pillars-eyebrow    { color: var(--revalta-accent); }
.revalta-section-pillars.revalta-section-inverse .revalta-section-pillars-title      { color: var(--revalta-fg1-inverse); }
.revalta-section-pillars.revalta-section-inverse .revalta-section-pillars-numeral    { color: var(--revalta-accent); border-bottom-color: var(--revalta-sep); }
.revalta-section-pillars.revalta-section-inverse .revalta-section-pillars-item-title { color: var(--revalta-fg1-inverse); }
.revalta-section-pillars.revalta-section-inverse .revalta-section-pillars-item-lede,
.revalta-section-pillars.revalta-section-inverse .revalta-section-pillars-item-body  { color: var(--revalta-fg2-inverse); }

/* ────────────────────────────────────────────────────────────
   Variante broll — fond image + voile B/C + noise
   ──────────────────────────────────────────────────────────── */
.revalta-section-pillars[data-revalta-broll] {
  background-image: var(--revalta-broll);
  background-size: cover;
  background-position: center;
}
.revalta-section-pillars[data-revalta-broll]::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--revalta-veil);
  z-index: 0;
}
.revalta-section-pillars.revalta-section-inverse[data-revalta-broll]::before {
  background: var(--revalta-veil-inverse);
}
.revalta-section-pillars[data-revalta-broll]::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='320' height='320'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' seed='5' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0.7 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  opacity: 0.22;
  mix-blend-mode: overlay;
  z-index: 1;
  pointer-events: none;
}

/* ─── Animation d'entrée — fade discret au load ────────────── */
@media (prefers-reduced-motion: no-preference) {
  .revalta-section-pillars-eyebrow,
  .revalta-section-pillars-title,
  .revalta-section-pillars-item {
    opacity: 0;
    animation: revalta-pillars-fade-in 600ms var(--revalta-ease) both;
  }
  .revalta-section-pillars-eyebrow { animation-delay: 0ms; }
  .revalta-section-pillars-title   { animation-delay: 80ms; }
  .revalta-section-pillars-item:nth-child(1) { animation-delay: 160ms; }
  .revalta-section-pillars-item:nth-child(2) { animation-delay: 240ms; }
  .revalta-section-pillars-item:nth-child(3) { animation-delay: 320ms; }
  .revalta-section-pillars-item:nth-child(4) { animation-delay: 400ms; }
}
@keyframes revalta-pillars-fade-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ─── Responsive ───────────────────────────────────────────── */
@media (max-width: 1024px) {
  .revalta-section-pillars-list,
  .revalta-section-pillars-list:has(> :nth-child(4)) {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 640px) {
  .revalta-section-pillars {
    padding-block: clamp(72px, 12vh, 120px);
    padding-inline: 22px;
  }
  /* .revalta-section-pillars:first-child — compensation globale (body.revalta main > :first-child) */
  .revalta-section-pillars-header { max-width: 90vw; }
  .revalta-section-pillars-content { gap: 56px; }
  .revalta-section-pillars-list,
  .revalta-section-pillars-list:has(> :nth-child(4)),
  .revalta-section-pillars-list:has(> :nth-child(2):last-child) {
    grid-template-columns: 1fr;
    row-gap: 48px;
  }
}

/* ─── Filet d'ouverture de l'en-tête (principe Openstone, Home validée) ── */
.revalta-section-pillars-header{border-top:1px solid var(--revalta-sep);padding-top:28px}

/* ═══ Identité (28/09/2026) — passage arrondis / or ═══════════
   Cartes 20 px (blanc bordé, papier sans bord sur bande blanche, verre
   dépoli sur marine), numéros en or. */
.revalta-section-pillars-item { background: var(--revalta-light); border: 1px solid var(--revalta-sep); border-radius: var(--revalta-r-card); padding: clamp(24px, 2.4vw, 32px); display: grid; gap: 14px; align-content: start; box-shadow: none; }
[data-revalta-band="white"] .revalta-section-pillars-item { background: var(--revalta-bg); border-color: transparent; }
.revalta-section-pillars.revalta-section-inverse .revalta-section-pillars-item { background: rgba(245, 243, 238, 0.06); border-color: var(--revalta-sep-inverse); -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px); }
.revalta-section-pillars-numeral { font-size: clamp(30px, 2.8vw, 40px); font-weight: var(--revalta-w-title); letter-spacing: -0.03em; line-height: 1; color: var(--revalta-gold); font-variant-numeric: tabular-nums; }
.revalta-section-pillars.revalta-section-inverse .revalta-section-pillars-numeral { color: var(--revalta-gold-inverse); }
.revalta-section-pillars-item-body { font-size: 17px; line-height: 1.55; }