/* ======================================================
   RéfriSud — styles.css (propre & consolidé)
   - Fond bleu global (identité RéfriSud)
   - Contenu en cartes blanches lisibles
   - Navigation blanche sur bleu (accessible)
   - Grilles responsives (CSS Grid/Flex)
   - Sans !important (sauf nécessité minimale)
   ====================================================== */

/* ---------- Variables (couleurs, rayons, largeur) ---------- */
:root {
  --bg: #0f2281;           /* Fond bleu RéfriSud */
  --fg: #ffffff;           /* Texte global (zones hors cartes) */
  --muted: #d4dcff;        /* Texte secondaire sur bleu */
  --brand: #ffffff;        /* Liens/titres sur fond bleu */
  --card: #ffffff;         /* Fond des cartes */
  --card-fg: #111111;      /* Texte dans les cartes */
  --accent: #0f2281;       /* Bleu RéfriSud dans les cartes */
  --ring: 2px solid #ffffff;
  --radius: 16px;
  --container: 1100px;
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

/* ---------- Base ---------- */
* { box-sizing: border-box; }
html, body { height: 100%; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font: 16px/1.7 system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
@media (min-width: 768px){ html { font-size: 17px; } }

img { max-width: 100%; height: auto; display: block; border-radius: .75rem; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 1rem; }

/* ---------- Liens ---------- */
a { color: var(--brand); }
a:hover { opacity: .9; }

/* ---------- Accessibilité ---------- */
.skip-link {
  position: absolute;
  left: -9999px; top: auto;
  width: 1px; height: 1px; overflow: hidden;
}
.skip-link:focus {
  position: static; width: auto; height: auto;
  padding: .5rem; background: var(--brand); color: var(--accent); border-radius: .5rem;
}

/* ---------- Header & Navigation ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(180%) blur(8px);
  background: rgba(15,34,129,0.9);
  border-bottom: none;
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; padding: .75rem 0;
}
.brand {
  display: flex; align-items: center; gap: .75rem;
  text-decoration: none; color: var(--brand); font-weight: 700;
}
.brand-logo { height: 40px; width: auto; border-radius: .5rem; }
.brand-name { display: none; }
@media (min-width: 480px){ .brand-name { display: inline; } }

.site-nav ul {
  list-style: none; margin: 0; padding: 0;
  display: flex; gap: .25rem;
}
.site-nav a {
  display: block;
  padding: .5rem .75rem;
  text-decoration: none;
  color: #ffffff;
  border-radius: .75rem;
  font-weight: 500;
  transition: background-color .2s ease;
}
.site-nav a:hover, .site-nav a:focus-visible {
  background: rgba(255,255,255,0.18);
  color: #ffffff;
  outline: none;
}

/* Burger menu */
.nav-toggle {
  background: transparent; border: 0; display: grid; gap: 4px;
  padding: .5rem; border-radius: .5rem;
}
.nav-toggle:focus-visible { outline: var(--ring); }
.nav-toggle-bar { width: 24px; height: 2px; background: #ffffff; display: block; }

@media (max-width: 900px){
  .site-nav {
    position: fixed; inset: 56px 0 auto 0;
    background: rgba(15,34,129,0.95);
    transform: translateY(-120%);
    transition: transform .25s ease;
  }
  .site-nav.open { transform: translateY(0%); }
  .site-nav ul { flex-direction: column; padding: .5rem; gap: .25rem; }
}
@media (min-width: 901px){ .nav-toggle { display: none; } }

/* ---------- Mise en page ---------- */
main { padding: 2rem 0; }
h1, h2, h3 { line-height: 1.2; margin: 1.2rem 0 .6rem; color: var(--brand); }
.lead { font-size: 1.125rem; }

.grid { display: grid; gap: 1rem; grid-template-columns: 1fr; }
@media (min-width: 640px){ .grid.two { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px){ .grid.three { grid-template-columns: repeat(3, 1fr); } }

/* ---------- Cartes blanches (contenu lisible) ---------- */
.card {
  background: var(--card);
  color: var(--card-fg);
  border: none;
  border-radius: var(--radius);
  padding: 1rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}
.card h1, .card h2, .card h3 { color: var(--accent); }
.card p, .card li { color: var(--card-fg); line-height: 1.7; }
/* Liens à l’intérieur des cartes */
.card a { color: var(--accent); text-decoration: underline; }
.card a:hover { text-decoration: none; }

/* Texte principal lisible même hors carte (étiquette blanche) */
.lead {
  color: var(--card-fg);
  background: var(--card);
  padding: .5rem .75rem;
  border-radius: .5rem;
  display: inline-block;
  line-height: 1.6;
}
/* Si .lead est déjà dans une carte, garder l’aspect normal */
.card .lead {
  background: transparent;
  padding: 0;
  border-radius: 0;
}

/* ---------- Boutons génériques (ne pas affecter le menu) ---------- */
button, .btn {
  background: #ffffff; color: var(--accent);
  border: none; border-radius: 8px;
  padding: .5rem 1rem; font-weight: 600; text-decoration: none;
  cursor: pointer;
}
button:hover, .btn:hover { background: #d4dcff; }

/* ---------- Partenaires (logos qui ressortent) ---------- */
img.partner {
  background: #ffffff;
  padding: 10px;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.14);
  display: block;
  max-height: 72px;
  width: auto;
  margin: 8px auto;
}
aside.card {
  background: transparent;
  box-shadow: none;
  border: none;
  padding: 0;
}
aside.card a { display: inline-block; }

/* ---------- Footer ---------- */
.site-footer {
  background: rgba(15,34,129,0.95);
  color: #ffffff;
  margin-top: 3rem;
  border-top: none;
}
.site-footer .container {
  display: grid; justify-items: center; gap: .5rem;
  padding: 1.5rem 1rem;
}
.footer-logo { opacity: .9; }