:root {
  --bleu: #2c6e9b;
  --bleu-fonce: #1d4e73;
  --vert: #4a9b6f;
  --orange: #e8963e;
  --fond: #f7fafc;
  --texte: #2d3748;
  --gris: #64748b;
  --blanc: #ffffff;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  color: var(--texte);
  background: var(--fond);
  line-height: 1.7;
}

/* ---------- Navigation ---------- */
header.site-header {
  background: var(--blanc);
  box-shadow: 0 2px 10px rgba(0,0,0,.08);
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: .8rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .5rem;
}
.logo {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--bleu-fonce);
  text-decoration: none;
}
.logo span { color: var(--orange); }
nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: .3rem;
}
nav a {
  text-decoration: none;
  color: var(--texte);
  font-size: .88rem;
  padding: .45rem .7rem;
  border-radius: 6px;
  transition: background .2s, color .2s;
}
nav a:hover, nav a.actif {
  background: var(--bleu);
  color: var(--blanc);
}

/* ---------- Héros ---------- */
.hero {
  background: linear-gradient(135deg, var(--bleu) 0%, var(--bleu-fonce) 100%);
  color: var(--blanc);
  padding: 4.5rem 1.5rem;
  text-align: center;
}
.hero h1 { font-size: 2.3rem; margin-bottom: 1rem; }
.hero p { max-width: 720px; margin: 0 auto 1.8rem; font-size: 1.12rem; opacity: .95; }
.btn {
  display: inline-block;
  background: var(--orange);
  color: var(--blanc);
  padding: .8rem 1.8rem;
  border-radius: 30px;
  text-decoration: none;
  font-weight: 600;
  transition: transform .2s, box-shadow .2s;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 6px 16px rgba(0,0,0,.25); }
.btn.secondaire { background: transparent; border: 2px solid var(--blanc); }

/* ---------- Contenu ---------- */
main { max-width: 1100px; margin: 0 auto; padding: 2.5rem 1.5rem 4rem; }

.cartes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.4rem;
  margin: 2rem 0;
}
.carte {
  background: var(--blanc);
  border-radius: 12px;
  padding: 1.6rem;
  box-shadow: 0 3px 12px rgba(0,0,0,.07);
  border-top: 4px solid var(--bleu);
  transition: transform .2s;
}
.carte:hover { transform: translateY(-4px); }
.carte.vert { border-top-color: var(--vert); }
.carte.orange { border-top-color: var(--orange); }
.carte h3 { color: var(--bleu-fonce); margin-bottom: .6rem; font-size: 1.1rem; }
.carte p { font-size: .93rem; color: var(--gris); }
.carte a.lien-carte {
  display: inline-block;
  margin-top: .8rem;
  color: var(--bleu);
  font-weight: 600;
  font-size: .9rem;
  text-decoration: none;
}
.carte a.lien-carte:hover { text-decoration: underline; }

h2.section-titre {
  color: var(--bleu-fonce);
  font-size: 1.7rem;
  margin: 2.5rem 0 1rem;
  padding-bottom: .4rem;
  border-bottom: 3px solid var(--orange);
  display: inline-block;
}
main h2 { color: var(--bleu-fonce); margin-top: 2rem; }
main h3 { color: var(--bleu); margin-top: 1.5rem; }
main p, main li { margin-bottom: .8rem; }
main ul, main ol { margin: 0 0 1rem 1.5rem; }

.encadre {
  background: #eef6fb;
  border-left: 5px solid var(--bleu);
  border-radius: 8px;
  padding: 1.2rem 1.4rem;
  margin: 1.5rem 0;
}
.encadre.alerte { background: #fdf3e7; border-left-color: var(--orange); }
.encadre.succes { background: #edf7f1; border-left-color: var(--vert); }

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  background: var(--blanc);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,.06);
}
th, td { padding: .75rem 1rem; text-align: left; font-size: .92rem; }
th { background: var(--bleu); color: var(--blanc); }
tr:nth-child(even) td { background: #f1f6fa; }

a { color: var(--bleu); }

/* ---------- Pied de page ---------- */
footer {
  background: var(--bleu-fonce);
  color: #cbd9e4;
  padding: 2.5rem 1.5rem 1.5rem;
  font-size: .88rem;
}
.footer-wrap {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
}
footer h4 { color: var(--blanc); margin-bottom: .7rem; }
footer ul { list-style: none; }
footer a { color: #cbd9e4; text-decoration: none; }
footer a:hover { color: var(--orange); }
.copyright {
  max-width: 1100px;
  margin: 2rem auto 0;
  padding-top: 1.2rem;
  border-top: 1px solid rgba(255,255,255,.15);
  text-align: center;
  font-size: .8rem;
}

@media (max-width: 700px) {
  .hero h1 { font-size: 1.7rem; }
  nav ul { justify-content: center; }
}