/* ================================================================
   global.css — styles communs à toutes les pages du site
   "Les Orgues de la Cathédrale de Metz"
   Palette : bordeaux profond (velours), or/laiton, pierre claire.
   ================================================================ */

:root {
  /* Couleurs */
  --color-bordeaux-900: #3d0f19;
  --color-bordeaux-700: #641c2b;
  --color-bordeaux-600: #7a2436;
  --color-or-500: #b08a3e;
  --color-or-400: #c9a55c;
  --color-or-200: #e9d9b0;
  --color-pierre-100: #faf7f1;
  --color-pierre-200: #f2ede2;
  --color-pierre-300: #e7ddc9;
  --color-encre-900: #241c1a;
  --color-encre-700: #4a3f3a;
  --color-encre-500: #776a63;
  --color-blanc: #ffffff;
  --color-succes: #2f6b45;
  --color-erreur: #a3313f;

  /* Typographie */
  --font-titres: 'Cormorant Garamond', 'Georgia', serif;
  --font-texte: 'Source Sans 3', 'Segoe UI', sans-serif;

  /* Mise en page */
  --largeur-max: 1180px;
  --rayon: 8px;
  --rayon-lg: 14px;
  --ombre-douce: 0 4px 18px rgba(36, 28, 26, 0.08);
  --ombre-forte: 0 18px 44px rgba(36, 15, 20, 0.16);
  --transition: 220ms ease;
}

/* ---------- Reset minimal ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-texte);
  color: var(--color-encre-900);
  background: var(--color-pierre-100);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4 {
  font-family: var(--font-titres);
  font-weight: 600;
  color: var(--color-bordeaux-900);
  line-height: 1.2;
  margin: 0 0 0.5em;
}
h1 { font-size: clamp(2.1rem, 4vw, 3.2rem); font-weight: 700; }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); }
h3 { font-size: 1.35rem; }
p { margin: 0 0 1em; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: -999px; top: 0; background: var(--color-bordeaux-900);
  color: var(--color-blanc); padding: 0.75em 1.25em; z-index: 999; border-radius: 0 0 var(--rayon) 0;
}
.skip-link:focus { left: 0; }

/* ---------- Conteneurs ---------- */
.container {
  width: 100%;
  max-width: var(--largeur-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}
.section { padding: clamp(2.75rem, 6vw, 5.5rem) 0; }
.section--alt {
  background-color: var(--color-pierre-200);
  background-image: radial-gradient(circle at 1px 1px, rgba(61,15,25,0.06) 1px, transparent 0);
  background-size: 22px 22px;
}
.section-header { max-width: 720px; margin: 0 auto 2.75rem; text-align: center; }
.section-header .eyebrow {
  display: inline-block; font-family: var(--font-titres); font-style: italic;
  color: var(--color-or-500); letter-spacing: .04em; margin-bottom: .35em; font-size: 1.05rem;
  position: relative; padding-bottom: 0.6em;
}
.section-header .eyebrow::after {
  content: ""; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%);
  width: 46px; height: 2px; background: linear-gradient(90deg, transparent, var(--color-or-500), transparent);
}

/* ---------- En-tête / navigation ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--color-pierre-100);
  border-bottom: 1px solid var(--color-pierre-300);
  box-shadow: var(--ombre-douce);
}
.site-header__inner {
  max-width: var(--largeur-max); margin: 0 auto; padding: 0.75rem 1.5rem;
  display: flex; align-items: center; justify-content: space-between; gap: 1.5rem;
}
.site-brand { display: flex; align-items: center; gap: 0.75rem; }
.site-brand__logo {
  width: 48px; height: 48px; object-fit: cover; border-radius: 50%;
  border: 2px solid var(--color-or-400);
}
.site-brand__text { display: flex; flex-direction: column; line-height: 1.1; }
.site-brand__title { font-family: var(--font-titres); font-weight: 700; font-size: 1.2rem; color: var(--color-bordeaux-900); }
.site-brand__subtitle { font-size: 0.72rem; letter-spacing: .08em; text-transform: uppercase; color: var(--color-or-500); }

.site-nav ul { display: flex; gap: 1.75rem; }
.site-nav a {
  font-weight: 600; font-size: 0.95rem; color: var(--color-encre-700);
  padding: 0.4rem 0.1rem; position: relative; transition: color var(--transition);
}
.site-nav a::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: -2px; height: 2px;
  background: var(--color-or-500); transition: right var(--transition);
}
.site-nav a:hover, .site-nav a.is-active { color: var(--color-bordeaux-900); }
.site-nav a:hover::after, .site-nav a.is-active::after { right: 0; }

.nav-toggle {
  display: none; flex-direction: column; justify-content: center; align-items: center; gap: 5px;
  width: 40px; height: 40px; background: none; border: none; cursor: pointer;
}
.nav-toggle span {
  display: block; width: 24px; height: 2px; background: var(--color-bordeaux-900);
  transition: transform var(--transition), opacity var(--transition);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Boutons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5em;
  font-family: var(--font-texte); font-weight: 600; font-size: 0.95rem;
  padding: 0.75em 1.6em; border-radius: var(--rayon); border: 1px solid transparent;
  cursor: pointer; transition: all var(--transition); text-align: center;
}
.btn--primary { background: var(--color-bordeaux-700); color: var(--color-blanc); }
.btn--primary:hover { background: var(--color-bordeaux-900); }
.btn--or { background: var(--color-or-500); color: var(--color-blanc); }
.btn--or:hover { background: var(--color-or-400); }
.btn--outline { background: transparent; border-color: var(--color-bordeaux-700); color: var(--color-bordeaux-700); }
.btn--outline:hover { background: var(--color-bordeaux-700); color: var(--color-blanc); }
/* Variante à utiliser sur un fond sombre (ex : le hero) : le bouton
   ".btn--outline" classique n'est pas assez contrasté sur du bordeaux. */
.btn--outline-light { background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.55); color: var(--color-blanc); backdrop-filter: blur(2px); }
.btn--outline-light:hover { background: var(--color-blanc); border-color: var(--color-blanc); color: var(--color-bordeaux-900); }
.btn--sm { padding: 0.45em 1em; font-size: 0.85rem; }
.btn--danger { background: var(--color-erreur); color: var(--color-blanc); }
.btn--danger:hover { filter: brightness(0.9); }
.btn[disabled] { opacity: .5; cursor: not-allowed; }

/* ---------- Cartes ---------- */
.card {
  background: var(--color-blanc); border-radius: var(--rayon);
  box-shadow: var(--ombre-douce); overflow: hidden; position: relative;
  transition: transform var(--transition), box-shadow var(--transition);
}
.card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--color-or-500), var(--color-or-400));
  transform: scaleX(0); transform-origin: left; transition: transform var(--transition);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--ombre-forte); }
.card:hover::before { transform: scaleX(1); }

/* ---------- Formulaires ---------- */
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; font-weight: 600; margin-bottom: 0.4em; color: var(--color-encre-900); }
.form-control, textarea, select {
  width: 100%; font-family: var(--font-texte); font-size: 1rem;
  padding: 0.7em 0.9em; border: 1px solid var(--color-pierre-300); border-radius: var(--rayon);
  background: var(--color-blanc); color: var(--color-encre-900); transition: border-color var(--transition);
}
.form-control:focus, textarea:focus, select:focus {
  outline: none; border-color: var(--color-or-500);
  box-shadow: 0 0 0 3px rgba(176, 138, 62, 0.18);
}
.form-hint { font-size: 0.85rem; color: var(--color-encre-500); margin-top: 0.3em; }
.form-row { display: grid; gap: 1rem; }
@media (min-width: 640px) { .form-row--2 { grid-template-columns: 1fr 1fr; } }
.form-row--3col { display: grid; gap: 1rem; }
@media (min-width: 720px) { .form-row--3col { grid-template-columns: repeat(3, 1fr); } }
fieldset { border: 1px solid var(--color-pierre-300); border-radius: var(--rayon); padding: 1rem 1.25rem; margin: 0 0 1.25rem; }
legend { font-weight: 700; padding: 0 .5em; color: var(--color-bordeaux-900); }

/* ---------- Alertes / messages flash ---------- */
.alert { padding: 0.9em 1.1em; border-radius: var(--rayon); margin-bottom: 1.25rem; font-weight: 500; }
.alert--succes { background: #e6f2ea; color: var(--color-succes); border: 1px solid #bfe0cb; }
.alert--erreur { background: #f8e6e8; color: var(--color-erreur); border: 1px solid #eec3c8; }
.alert--info { background: var(--color-pierre-200); color: var(--color-encre-700); border: 1px solid var(--color-pierre-300); }

/* ---------- Bandeau décoratif en arcades ----------
   Petit motif évoquant une arcature de cathédrale, utilisé comme
   transition entre deux blocs de couleur (au lieu d'un trait net). */
.arch-divider { height: 26px; width: 100%; }
.arch-divider--bordeaux-to-pierre {
  background-image: radial-gradient(circle at 22px 0, transparent 22px, var(--color-pierre-200) 23px);
  background-size: 44px 26px;
  background-repeat: repeat-x;
  background-color: var(--color-bordeaux-900);
}
.arch-divider--pierre-to-bordeaux {
  background-image: radial-gradient(circle at 22px 26px, transparent 22px, var(--color-bordeaux-900) 23px);
  background-size: 44px 26px;
  background-repeat: repeat-x;
  background-color: var(--color-pierre-200);
}

/* ---------- Pied de page ---------- */
.site-footer { background: var(--color-bordeaux-900); color: var(--color-pierre-200); }
.site-footer__inner {
  max-width: var(--largeur-max); margin: 0 auto; padding: 3rem 1.5rem 2rem;
  display: grid; gap: 2rem; grid-template-columns: 1.4fr 1fr 1fr 1fr;
}
.site-footer__logo { width: 44px; height: 44px; border-radius: 50%; margin-bottom: 0.75rem; object-fit: cover; }
.site-footer__col h2 { font-family: var(--font-titres); font-size: 1.05rem; color: var(--color-or-400); margin-bottom: 0.75em; }
.site-footer__col ul li { margin-bottom: 0.5em; }
.site-footer__col a { color: var(--color-pierre-200); opacity: 0.85; transition: opacity var(--transition), color var(--transition); }
.site-footer__col a:hover { opacity: 1; color: var(--color-or-400); }
.site-footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.12); padding: 1rem 1.5rem;
  max-width: var(--largeur-max); margin: 0 auto; display: flex; justify-content: space-between;
  flex-wrap: wrap; gap: 0.5rem; font-size: 0.85rem; opacity: 0.75;
}
.site-footer__bottom a { text-decoration: underline; }

/* ---------- Utilitaires ---------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.muted { color: var(--color-encre-500); }
.tag {
  display: inline-block; font-size: 0.75rem; font-weight: 700; letter-spacing: .05em;
  text-transform: uppercase; padding: 0.3em 0.75em; border-radius: 999px;
  background: var(--color-or-200); color: var(--color-bordeaux-900);
}

/* ---------- Responsive nav ---------- */
@media (max-width: 860px) {
  .nav-toggle { display: flex; }
  .site-nav {
    position: absolute; top: 100%; left: 0; right: 0; background: var(--color-pierre-100);
    border-bottom: 1px solid var(--color-pierre-300); box-shadow: var(--ombre-douce);
    max-height: 0; overflow: hidden; transition: max-height var(--transition);
  }
  .site-nav.is-open { max-height: 420px; }
  .site-nav ul { flex-direction: column; gap: 0; padding: 0.5rem 1.5rem 1rem; }
  .site-nav a { display: block; padding: 0.75em 0; }
  .site-footer__inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) {
  .site-footer__inner { grid-template-columns: 1fr; }
}