/* ============================================================
   Altus Conseil — design-system/sections/differentiators.css
   ------------------------------------------------------------
   Section différenciateurs — 4 à 6 "engagements" / "principes".
   Plus dense que Pillars, moins éditorial.

   Variantes — identiques au reste du système.

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

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

.altus-section-differentiators {
  position: relative;
  background: var(--altus-bg);
  color: var(--altus-fg1);
  font-family: var(--altus-font);
  font-weight: var(--altus-w-light);
  isolation: isolate;
  padding-block: clamp(96px, 14vh, 180px);
  padding-inline: 9vw;
}

/* Première section de la page — respiration de 25vh sous le header fixé. */
.altus-section-differentiators:first-child {
  padding-top: 25vh;
}

.altus-section-differentiators-content {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: clamp(56px, 7vh, 80px);
}

/* ─── Header ───────────────────────────────────────────────── */

.altus-section-differentiators-header {
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 32ch;
}
.altus-section-differentiators-eyebrow {
  margin: 0;
  font-size: 13px;
  font-weight: var(--altus-w-medium);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--altus-accent);
}
.altus-section-differentiators-title {
  margin: 0;
  font-size: clamp(36px, 4.4vw, 64px);
  font-weight: var(--altus-w-light);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--altus-fg1);
  text-wrap: balance;
}

/* ─── Grille des items ─────────────────────────────────────── */

.altus-section-differentiators-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  column-gap: clamp(48px, 6vw, 96px);
  row-gap: clamp(48px, 6vh, 72px);
}

.altus-section-differentiators-item {
  display: grid;
  /* Numéro (auto) + texte (1fr) — alignés sur la baseline. */
  grid-template-columns: auto 1fr;
  column-gap: clamp(20px, 2vw, 32px);
  align-items: baseline;
}

/* Numéro à deux chiffres */
.altus-section-differentiators-numeral {
  margin: 0;
  font-size: clamp(32px, 3.6vw, 48px);
  font-weight: var(--altus-w-light);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--altus-fg2);
  font-variant-numeric: tabular-nums lining-nums;
  /* Aligné en haut du bloc texte malgré le baseline d'item. */
  align-self: start;
  padding-top: 4px;
}

/* Bloc texte (titre + body) */
.altus-section-differentiators-item-title,
.altus-section-differentiators-item-body {
  margin: 0;
  grid-column: 2;
  max-width: 48ch;
}
.altus-section-differentiators-item-title {
  font-size: clamp(18px, 1.6vw, 22px);
  font-weight: var(--altus-w-medium);
  line-height: 1.3;
  letter-spacing: -0.005em;
  color: var(--altus-fg1);
}
.altus-section-differentiators-item-body {
  margin-top: 12px;
  font-size: clamp(14px, 1vw, 16px);
  font-weight: var(--altus-w-light);
  line-height: 1.55;
  color: var(--altus-fg2);
  text-wrap: pretty;
}

/* ─── Inverse ──────────────────────────────────────────────── */
.altus-section-differentiators.altus-section-inverse {
  background: var(--altus-bg-inverse);
  color: var(--altus-fg1-inverse);
}
.altus-section-differentiators.altus-section-inverse .altus-section-differentiators-title       { color: var(--altus-fg1-inverse); }
.altus-section-differentiators.altus-section-inverse .altus-section-differentiators-numeral         { color: var(--altus-fg2-inverse); }
.altus-section-differentiators.altus-section-inverse .altus-section-differentiators-item-title  { color: var(--altus-fg1-inverse); }
.altus-section-differentiators.altus-section-inverse .altus-section-differentiators-item-body   { color: var(--altus-fg2-inverse); }

/* ─── Broll ────────────────────────────────────────────────── */
.altus-section-differentiators[data-altus-broll] {
  background-image: var(--altus-broll);
  background-size: cover;
  background-position: center;
}
.altus-section-differentiators[data-altus-broll]::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(20, 17, 13, 0.72);
  z-index: 0;
}
.altus-section-differentiators.altus-section-inverse[data-altus-broll]::before {
  background: rgba(235, 229, 218, 0.88);
}
.altus-section-differentiators[data-altus-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 ───────────────────────────────────── */
@media (prefers-reduced-motion: no-preference) {
  .altus-section-differentiators-header,
  .altus-section-differentiators-item {
    opacity: 0;
    animation: altus-diff-fade-in 600ms var(--altus-ease) both;
  }
  .altus-section-differentiators-header { animation-delay: 0ms; }
  .altus-section-differentiators-item:nth-child(1) { animation-delay: 120ms; }
  .altus-section-differentiators-item:nth-child(2) { animation-delay: 180ms; }
  .altus-section-differentiators-item:nth-child(3) { animation-delay: 240ms; }
  .altus-section-differentiators-item:nth-child(4) { animation-delay: 300ms; }
  .altus-section-differentiators-item:nth-child(5) { animation-delay: 360ms; }
  .altus-section-differentiators-item:nth-child(6) { animation-delay: 420ms; }
}
@keyframes altus-diff-fade-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ─── Responsive ───────────────────────────────────────────── */
@media (max-width: 768px) {
  .altus-section-differentiators {
    padding-block: clamp(72px, 12vh, 120px);
    padding-inline: 22px;
  }
  .altus-section-differentiators:first-child { padding-top: 20vh; }
  .altus-section-differentiators-content { gap: 48px; }
  .altus-section-differentiators-grid {
    grid-template-columns: 1fr;
    row-gap: 40px;
  }
  .altus-section-differentiators-item {
    column-gap: 18px;
  }
}