/* Conteneurs, sections, header de site, elements de squelette communs. */

/* ============ Conteneurs & sections ============ */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--espace-m);
}

.section { padding: var(--espace-xl) var(--espace-m); }
.section--doux { background: var(--noir-doux); }

.section-head {
  max-width: 1200px;
  margin: 0 auto var(--espace-l);
}
.section-head--centre { text-align: center; }
.section-head__sur {
  color: var(--or);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.3em;
  text-transform: uppercase;
}
.section-head__titre {
  margin-top: 0.6rem;
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  color: var(--creme);
}
.section-head__lead {
  color: var(--gris);
  margin-top: var(--espace-s);
  max-width: 55ch;
  line-height: 1.7;
}
.section-head--centre .section-head__lead { margin-inline: auto; }

.lien-or {
  color: var(--or);
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  border-bottom: 1px solid rgba(201, 162, 75, 0.35);
  padding-bottom: 2px;
  transition: border-color var(--transition);
}
.lien-or:hover { border-color: var(--or); }

/* ============ Accessibilite ============ */
.skip-link {
  position: fixed;
  top: -100px;
  left: 1rem;
  z-index: 300;
  padding: 0.6rem 1.2rem;
  background: var(--or);
  color: var(--noir);
  border-radius: 0 0 10px 10px;
  font-size: 0.9rem;
  font-weight: 500;
  transition: top 0.3s ease;
}
.skip-link:focus { top: 0; }

.noscript-note {
  padding: 0.8rem var(--espace-m);
  text-align: center;
  font-size: 0.9rem;
  color: var(--creme);
  background: var(--noir-doux);
  border-bottom: 1px solid rgba(201, 162, 75, 0.35);
}

/* ============ Header ============ */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 80;
  display: flex;
  align-items: center;
  gap: var(--espace-m);
  padding: 1.1rem var(--espace-m);
  border-bottom: 1px solid transparent;
  transition: background 0.4s ease, padding 0.4s ease, border-color 0.4s ease;
}
.site-header.is-solid {
  background: rgba(13, 13, 13, 0.9);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-color: rgba(255, 255, 255, 0.06);
  padding: 0.7rem var(--espace-m);
}

.site-header__logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-titre);
  font-size: 1.3rem;
  color: var(--creme);
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.site-header__losange {
  width: 9px;
  height: 9px;
  background: var(--or);
  transform: rotate(45deg);
  flex-shrink: 0;
}

.site-header__nav {
  display: flex;
  align-items: center;
  gap: 1.6rem;
  margin-left: auto;
}
.site-header__nav a {
  color: var(--creme);
  font-size: 0.88rem;
  opacity: 0.8;
  transition: opacity 0.3s ease, color 0.3s ease;
}
.site-header__nav a:hover { opacity: 1; color: var(--or); }
.site-header__nav a[aria-current="page"] { color: var(--or); opacity: 1; }

.site-header__cta {
  font-size: 0.85rem;
  padding: 0.55rem 1.3rem;
}

.site-header__burger {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  margin-left: auto;
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 10px;
  cursor: pointer;
  z-index: 95;
}
.site-header__burger span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--creme);
  transition: transform 0.3s ease;
}
.site-header.is-open .site-header__burger span:first-child {
  transform: translateY(3.5px) rotate(45deg);
}
.site-header.is-open .site-header__burger span:last-child {
  transform: translateY(-3.5px) rotate(-45deg);
}

@media (max-width: 900px) {
  .site-header__burger { display: inline-flex; }
  /* Selecteur double pour battre .btn-gradient (charge apres dans la cascade) */
  .site-header .site-header__cta { display: none; }
  .site-header__nav {
    position: fixed;
    inset: 0;
    z-index: 90;
    flex-direction: column;
    justify-content: center;
    gap: 2rem;
    margin: 0;
    background: rgba(13, 13, 13, 0.97);
    opacity: 0;
    visibility: hidden;
  }
  /* Le fondu ne s'applique qu'a l'ouverture : un resize qui traverse
     le breakpoint ne fait pas flasher le menu ferme. */
  .site-header.is-open .site-header__nav {
    opacity: 1;
    visibility: visible;
    transition: opacity 0.35s ease;
  }
  .site-header__nav a {
    font-size: 1.5rem;
    font-family: var(--font-titre);
  }
}

/* ============ En-tete de page interieure ============ */
.page-hero {
  max-width: 1200px;
  margin: 0 auto;
  padding: calc(6rem + var(--espace-l)) var(--espace-m) var(--espace-l);
}
.page-hero__sur {
  color: var(--or);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.3em;
  text-transform: uppercase;
}
.page-hero__titre {
  margin-top: 0.6rem;
  font-size: clamp(2.8rem, 7vw, 5rem);
  line-height: 1.02;
  color: var(--creme);
}
.page-hero__lead {
  color: var(--gris);
  max-width: 58ch;
  margin-top: var(--espace-s);
  line-height: 1.7;
  font-size: 1.05rem;
}