:root {
  --bleu: #1b3a6b;
  --bleu-clair: #2e5fa3;
  --blanc: #ffffff;
  --gris-clair: #f4f6f9;
  --gris-bordure: #dfe4ea;
  --texte: #1f2933;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--texte);
  background: var(--gris-clair);
  line-height: 1.6;
}

a { color: var(--bleu-clair); text-decoration: none; }
a:hover { text-decoration: underline; }

.navbar {
  background: var(--bleu);
  color: var(--blanc);
  padding: 0.9rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}
.navbar a { color: var(--blanc); margin-left: 1.2rem; }
.navbar .brand { font-weight: 700; font-size: 1.25rem; margin-left: 0; }
.nav-links { display: flex; flex-wrap: wrap; align-items: center; }

.container {
  max-width: 1000px;
  margin: 2rem auto;
  padding: 0 1.5rem;
}

.hero {
  background: var(--bleu);
  color: var(--blanc);
  padding: 3.5rem 1.5rem;
  text-align: center;
}
.hero h1 { font-size: 2.2rem; margin-bottom: 0.5rem; }
.hero p { font-size: 1.1rem; opacity: 0.9; }

.btn {
  display: inline-block;
  background: var(--bleu-clair);
  color: var(--blanc);
  padding: 0.7rem 1.4rem;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1rem;
  margin-top: 0.5rem;
}
.btn:hover { background: var(--bleu); text-decoration: none; }
.btn-block { width: 100%; }

.card {
  background: var(--blanc);
  border: 1px solid var(--gris-bordure);
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 1.2rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.2rem;
}

form p { margin-bottom: 1rem; }
input, select, textarea {
  width: 100%;
  padding: 0.6rem;
  border: 1px solid var(--gris-bordure);
  border-radius: 6px;
  font-size: 1rem;
}
label { font-weight: 600; display: block; margin-bottom: 0.3rem; }

.messages { list-style: none; padding: 0; }
.messages li {
  padding: 0.8rem 1rem;
  border-radius: 6px;
  margin-bottom: 0.8rem;
}
.messages li.success { background: #e3f6e8; color: #1e6b3a; }
.messages li.error { background: #fde7e7; color: #a12121; }

.footer {
  text-align: center;
  padding: 2rem 1rem;
  color: #6b7280;
  font-size: 0.9rem;
}

table { width: 100%; border-collapse: collapse; }
th, td { padding: 0.6rem; border-bottom: 1px solid var(--gris-bordure); text-align: left; }