/* ============================================================
   Altus Conseil — design-system/sections/faq.css
   ------------------------------------------------------------
   Accordéon natif <details>/<summary>. Largeur contenue.

   Variantes — identiques au reste du système. La FAQ est souvent
   placée juste avant le CTA final, en contraste avec lui.

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

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

.altus-section-faq {
  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-faq:first-child {
  padding-top: 25vh;
}

.altus-section-faq-content {
  position: relative;
  z-index: 2;
  /* Largeur contenue — la FAQ se lit en un seul axe. */
  max-width: 820px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: clamp(48px, 6vh, 72px);
}

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

.altus-section-faq-header {
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 32ch;
}
.altus-section-faq-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-faq-title {
  margin: 0;
  font-size: clamp(32px, 4vw, 56px);
  font-weight: var(--altus-w-light);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--altus-fg1);
  text-wrap: balance;
}

/* ─── Liste accordéon ──────────────────────────────────────── */

.altus-section-faq-list {
  display: flex;
  flex-direction: column;
  /* Hairline haute pour fermer la liste. */
  border-top: 1px solid var(--altus-sep);
}

.altus-section-faq-item {
  border-bottom: 1px solid var(--altus-sep);
}

/* ─── Summary (question) ───────────────────────────────────── */

/* Reset du marker natif <summary>. */
.altus-section-faq-item-question {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-block: clamp(20px, 2vh, 24px);
  font-family: var(--altus-font);
  font-size: clamp(17px, 1.4vw, 20px);
  font-weight: var(--altus-w-medium);
  line-height: 1.4;
  letter-spacing: -0.005em;
  color: var(--altus-fg1);
  -webkit-tap-highlight-color: transparent;
  /* Le summary doit garder son comportement clavier ; on évite
     outline:none — mais on déplace la cible. */
  transition: color 200ms var(--altus-ease);
}
.altus-section-faq-item-question::-webkit-details-marker { display: none; }
.altus-section-faq-item-question::marker                  { display: none; content: ''; }

.altus-section-faq-item-question:focus-visible {
  outline: 1px solid var(--altus-fg2);
  outline-offset: 4px;
}

/* Indicateur "+ / −" — caractère typographique, JAMAIS un chevron SVG.
   Bronze : SEUL élément accent dans la section, sur l'ensemble des items. */
.altus-section-faq-item-question::after {
  content: '+';
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  font-family: var(--altus-font);
  font-size: 22px;
  font-weight: var(--altus-w-light);
  line-height: 1;
  color: var(--altus-accent);
  transition: transform 200ms var(--altus-ease);
}
.altus-section-faq-item[open] > .altus-section-faq-item-question::after {
  content: '−';   /* U+2212 minus, pas un trait d'union */
}

.altus-section-faq-item-question:hover { color: var(--altus-fg1); }

/* ─── Answer (réponse) ─────────────────────────────────────── */

.altus-section-faq-item-answer {
  margin: 0;
  padding-top: 16px;
  /* Léger padding-bottom pour respirer avant la prochaine question. */
  padding-bottom: clamp(20px, 2vh, 24px);
  padding-right: 48px; /* aligne sur la largeur du +/− */
  font-size: clamp(15px, 1.1vw, 16px);
  font-weight: var(--altus-w-light);
  line-height: 1.6;
  color: var(--altus-fg2);
  text-wrap: pretty;
}

/* ─── Inverse ──────────────────────────────────────────────── */
.altus-section-faq.altus-section-inverse {
  background: var(--altus-bg-inverse);
  color: var(--altus-fg1-inverse);
}
.altus-section-faq.altus-section-inverse .altus-section-faq-title    { color: var(--altus-fg1-inverse); }
.altus-section-faq.altus-section-inverse .altus-section-faq-list,
.altus-section-faq.altus-section-inverse .altus-section-faq-item     { border-color: rgba(20, 17, 13, 0.12); }
.altus-section-faq.altus-section-inverse .altus-section-faq-item-question  { color: var(--altus-fg1-inverse); }
.altus-section-faq.altus-section-inverse .altus-section-faq-item-answer   { color: var(--altus-fg2-inverse); }

/* ─── Broll ────────────────────────────────────────────────── */
.altus-section-faq[data-altus-broll] {
  background-image: var(--altus-broll);
  background-size: cover;
  background-position: center;
}
.altus-section-faq[data-altus-broll]::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(20, 17, 13, 0.72);
  z-index: 0;
}
.altus-section-faq.altus-section-inverse[data-altus-broll]::before {
  background: rgba(235, 229, 218, 0.88);
}
.altus-section-faq[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-faq-header,
  .altus-section-faq-list {
    opacity: 0;
    animation: altus-faq-fade-in 600ms var(--altus-ease) both;
  }
  .altus-section-faq-header { animation-delay: 0ms; }
  .altus-section-faq-list   { animation-delay: 120ms; }
}
@keyframes altus-faq-fade-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ─── Responsive ───────────────────────────────────────────── */
@media (max-width: 640px) {
  .altus-section-faq {
    padding-block: clamp(72px, 12vh, 120px);
    padding-inline: 22px;
  }
  .altus-section-faq:first-child { padding-top: 20vh; }
  .altus-section-faq-content { gap: 40px; }
  .altus-section-faq-item-question { gap: 16px; }
  .altus-section-faq-item-answer  { padding-right: 36px; }
}