/* Site statique, sans ressources externes : police système */
:root{
  --bg: #0b1220;
  --surface: #0f1b34;
  --card: #111f3d;
  --text: #e8eefc;
  --muted: #b7c5ea;
  --brand: #4fd1c5;
  --brand2: #60a5fa;
  --danger: #fb7185;
  --warning: #fbbf24;
  --ring: rgba(79,209,197,.35);

  --radius: 16px;
  --shadow: 0 10px 30px rgba(0,0,0,.25);
  --max: 1100px;
}

*{ box-sizing: border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, "Noto Sans", "Liberation Sans", sans-serif;
  line-height:1.55;
  color: var(--text);
  background:
    radial-gradient(900px 500px at 15% 10%, rgba(79,209,197,.15), transparent 60%),
    radial-gradient(800px 500px at 85% 15%, rgba(96,165,250,.14), transparent 60%),
    var(--bg);
}

img{ max-width:100%; height:auto; display:block; border-radius: var(--radius); }
a{ color: inherit; }
.container{ width:min(var(--max), calc(100% - 2rem)); margin-inline:auto; }

.skip-link{
  position:absolute; left:-999px; top:auto;
  background: var(--text); color: #000; padding:.6rem 1rem; border-radius:12px;
}
.skip-link:focus{ left: 1rem; top:1rem; z-index: 9999; }

.site-header{
  position:sticky; top:0; z-index:20;
  background: rgba(11,18,32,.65);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  gap:1rem; padding:.9rem 0;
}

.brand{ display:flex; align-items:center; gap:.75rem; text-decoration:none; }
.brand-mark{
  width:42px; height:42px; border-radius: 14px;
  background: linear-gradient(135deg, var(--brand), var(--brand2));
  box-shadow: 0 10px 30px rgba(96,165,250,.15);
}
.brand-text strong{ display:block; letter-spacing:.2px; }
.brand-text span{ display:block; color: var(--muted); font-size:.95rem; margin-top:.05rem; }

.site-nav{
  display:flex; align-items:center; gap:.8rem; flex-wrap:wrap;
}
.site-nav a{
  text-decoration:none;
  padding:.55rem .7rem;
  border-radius: 12px;
  color: var(--muted);
}
.site-nav a[aria-current="page"]{
  color: var(--text);
  background: rgba(255,255,255,.08);
}
.site-nav a:hover{ color: var(--text); background: rgba(255,255,255,.06); }

.nav-toggle{
  display:none;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.06);
  color: var(--text);
  border-radius: 12px;
  padding:.5rem .7rem;
}

.btn{
  display:inline-flex; align-items:center; justify-content:center;
  gap:.5rem;
  padding:.7rem 1rem;
  border-radius: 14px;
  text-decoration:none;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.06);
  color: var(--text);
  box-shadow: none;
}
.btn:hover{ background: rgba(255,255,255,.10); }
.btn:focus{ outline: 3px solid var(--ring); outline-offset: 2px; }
.btn-primary{
  border-color: rgba(79,209,197,.35);
  background: linear-gradient(135deg, rgba(79,209,197,.22), rgba(96,165,250,.18));
}
.btn-ghost{ background: transparent; }
.btn-small{ padding:.55rem .8rem; border-radius: 12px; }

.hero{ padding: 2.2rem 0 1.2rem; }
.hero-grid{
  display:grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 1.6rem;
  align-items: start;
}
.hero-copy h1{ font-size: clamp(1.8rem, 2.8vw, 3rem); line-height: 1.1; margin:0 0 .8rem; }
.lead{ color: var(--muted); font-size: 1.05rem; margin:0 0 1.2rem; }
.cta-row{ display:flex; gap:.8rem; flex-wrap:wrap; margin-bottom: 1rem; }

.hero-media{ position:relative; }
.hero-media img{ border-radius: 22px; box-shadow: var(--shadow); }
.hero-card{
  position:absolute; left: 1rem; right: 1rem; bottom: 1rem;
  background: rgba(15,27,52,.75);
  border: 1px solid rgba(255,255,255,.10);
  border-radius: 18px;
  padding: .9rem 1rem;
  backdrop-filter: blur(10px);
}
.hero-card p{ margin:.2rem 0; color: var(--text); }
.hero-card a{ color: var(--text); }

.section{ padding: 2.2rem 0; }
.section-alt{
  background: rgba(255,255,255,.03);
  border-top: 1px solid rgba(255,255,255,.06);
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.section h2{ margin: 0 0 1rem; }

.cards{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.card{
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius);
  padding: 1rem;
}
.card h3{ margin:.2rem 0 .5rem; }
.card p{ margin:0 0 .6rem; color: var(--muted); }
.link{ color: var(--text); }

.split{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
  align-items:center;
}
.media img{ box-shadow: var(--shadow); }

.chips{ list-style:none; display:flex; flex-wrap:wrap; gap:.5rem; padding:0; margin: 0; }
.chips li{
  font-size:.92rem;
  color: var(--muted);
  padding:.35rem .6rem;
  border: 1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.04);
  border-radius: 999px;
}

.checklist{ padding-left: 1.1rem; }
.checklist li{ margin:.35rem 0; }
.note{ color: var(--muted); }

.page{ padding: 1.6rem 0 2.4rem; }
.block{
  background: rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius);
  padding: 1rem;
  margin: 1rem 0;
}

.callout{
  border-radius: var(--radius);
  padding: 1rem;
  background: linear-gradient(135deg, rgba(79,209,197,.16), rgba(96,165,250,.12));
  border: 1px solid rgba(79,209,197,.28);
}
.callout.warning{
  background: rgba(251,191,36,.10);
  border-color: rgba(251,191,36,.35);
}

.grid-2{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  align-items:start;
}

.form label{ display:block; margin: .75rem 0; }
input, select, textarea{
  width:100%;
  margin-top:.35rem;
  padding: .75rem .8rem;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.05);
  color: var(--text);
}
input:focus, select:focus, textarea:focus{
  outline: 3px solid var(--ring);
  outline-offset: 2px;
}
.checkbox{ display:flex; gap:.6rem; align-items:flex-start; }
.checkbox input{ width:auto; margin-top:.25rem; }

.map-shell{
  margin-top: .8rem;
  min-height: 320px;
  border-radius: var(--radius);
  border: 1px dashed rgba(255,255,255,.18);
  background: rgba(255,255,255,.03);
  display:grid; place-items:center;
  overflow:hidden;
}
.map-shell iframe{
  width:100%; height: 360px; border:0;
}

.site-footer{
  padding: 2rem 0 1rem;
  border-top: 1px solid rgba(255,255,255,.08);
  background: rgba(0,0,0,.12);
}
.footer-grid{
  display:grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 1rem;
}
.site-footer ul{ list-style:none; padding:0; margin:.5rem 0 0; }
.site-footer li{ margin:.35rem 0; }
.footer-bottom{ padding-top: .8rem; opacity:.9; }

.sr-only{
  position:absolute; width:1px; height:1px; padding:0; margin:-1px;
  overflow:hidden; clip: rect(0,0,0,0); border:0;
}

/* Responsive */
@media (max-width: 920px){
  .hero-grid{ grid-template-columns: 1fr; }
  .hero-card{ position: static; margin-top: .9rem; }
  .cards{ grid-template-columns: 1fr; }
  .split{ grid-template-columns: 1fr; }
  .footer-grid{ grid-template-columns: 1fr; }
  .grid-2{ grid-template-columns: 1fr; }
  .nav-toggle{ display:inline-flex; }
  .site-nav{
    display:none;
    width:100%;
    padding-bottom: .8rem;
  }
  .site-nav.is-open{ display:flex; flex-direction:column; align-items:flex-start; }
}
/* ── Validation des champs de formulaire (v2) ───────────────────── */
input.is-invalid, select.is-invalid, textarea.is-invalid {
  border-color: #e63946 !important;
  box-shadow: 0 0 0 3px rgba(230,57,70,.15) !important;
}
input.is-valid, select.is-valid, textarea.is-valid {
  border-color: #28a745 !important;
  box-shadow: 0 0 0 3px rgba(40,167,69,.1) !important;
}
.field-error {
  display: block;
  color: #e63946;
  font-size: 0.82rem;
  margin-top: 0.3rem;
  font-weight: 500;
}
.status-success, .success {
  color: #155724;
  background: #d4edda;
  border: 1px solid #c3e6cb;
  padding: .8rem 1.2rem;
  border-radius: 8px;
  margin-top: 1rem;
}
.status-error, .error {
  color: #721c24;
  background: #f8d7da;
  border: 1px solid #f5c6cb;
  padding: .8rem 1.2rem;
  border-radius: 8px;
  margin-top: 1rem;
}
/* Scroll-to-top accessible */
#scrollTopBtn { display:none; }