:root {
    --primary: #0f3d5c;          /* bleu profond informatique */
    --primary-light: #0ea5e9;
    --success: #16a34a;
    --warning: #d97706;
    --danger: #dc2626;
    --info: #0891b2;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-500: #6b7280;
    --gray-800: #1f2937;
    --radius: 8px;
}

* { box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    margin: 0;
    color: var(--gray-800);
    background: #fafafa;
    line-height: 1.5;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 1rem; }

/* En-tête */
.site-header {
    background: var(--primary);
    color: #fff;
    padding: 1rem 0;
    border-bottom: 4px solid var(--primary-light);
}
.site-header h1 { margin: 0; font-size: 1.5rem; }
.site-header h1 a { color: #fff; text-decoration: none; }
.site-header .subtitle { margin: 0.25rem 0 0.75rem; color: #cbd5e1; font-size: 0.875rem; }

.main-nav a {
    color: #e0f2fe;
    text-decoration: none;
    margin-right: 1.25rem;
    padding: 0.25rem 0;
    border-bottom: 2px solid transparent;
    font-weight: 500;
}
.main-nav a:hover { color: #fff; border-bottom-color: #fff; }

main { padding: 2rem 0; min-height: 60vh; }

/* Hero */
.hero {
    background: #fff; padding: 1.5rem; border-radius: var(--radius);
    box-shadow: 0 1px 3px rgba(0,0,0,0.08); margin-bottom: 2rem;
}
.hero h2 { margin: 0 0 0.5rem; color: var(--primary); }
.lead { font-size: 1.125rem; color: var(--gray-500); }

/* Cartes */
.grid-cards {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1rem; margin-bottom: 2rem;
}
.card {
    background: #fff; padding: 1.25rem; border-radius: var(--radius);
    text-align: center; box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}
.card h3 { font-size: 2rem; margin: 0; color: var(--primary); }
.card p { margin: 0.25rem 0 0; color: var(--gray-500); font-size: 0.875rem; }

/* Tableaux */
.table-wrapper { overflow-x: auto; }
.data-table {
    width: 100%; border-collapse: collapse; background: #fff;
    border-radius: var(--radius); overflow: hidden;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    font-size: 0.9rem; margin-bottom: 1.5rem;
}
.data-table th, .data-table td {
    padding: 0.6rem 0.75rem; text-align: left;
    border-bottom: 1px solid var(--gray-200);
}
.data-table th {
    background: var(--gray-100); color: var(--gray-800);
    font-weight: 600; font-size: 0.8rem;
    text-transform: uppercase; letter-spacing: 0.03em;
}
.data-table tbody tr:hover { background: #f9fafb; }
.data-table td.num { text-align: center; font-variant-numeric: tabular-nums; }
.data-table td.small { font-size: 0.8rem; color: var(--gray-500); }

/* Badges */
.badge {
    display: inline-block; padding: 0.15rem 0.5rem; border-radius: 999px;
    font-size: 0.75rem; font-weight: 600;
}
.badge-primary   { background: #dbeafe; color: #1e40af; }
.badge-success   { background: #dcfce7; color: #166534; }
.badge-warning   { background: #fef3c7; color: #92400e; }
.badge-danger    { background: #fee2e2; color: #991b1b; }
.badge-info      { background: #cffafe; color: #155e75; }
.badge-secondary { background: var(--gray-200); color: var(--gray-800); }

/* Divers */
.semestre-block { margin-bottom: 2.5rem; }
.parcours-block {
    background: #fff; border-radius: var(--radius); padding: 0.75rem 1rem;
    margin-bottom: 0.75rem; box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}
.parcours-block summary { cursor: pointer; padding: 0.25rem 0; }
.lo-list { list-style: none; padding: 0; }
.lo-list li {
    background: #fff; padding: 0.5rem 0.75rem;
    border-left: 3px solid var(--primary-light);
    margin-bottom: 0.4rem; border-radius: 4px;
}
.note {
    background: #fef3c7; padding: 0.75rem 1rem;
    border-radius: var(--radius); border-left: 4px solid var(--warning);
}
.muted { color: var(--gray-500); }
.reserves-list li { margin-bottom: 0.5rem; }

/* SWOT */
.swot-grid {
    display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; margin-bottom: 2rem;
}
.swot-card {
    padding: 1rem; border-radius: var(--radius); background: #fff;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}
.swot-card h4 { margin: 0 0 0.5rem; }
.swot-card ul { margin: 0; padding-left: 1.25rem; }
.swot-forces        { border-top: 4px solid var(--success); }
.swot-faiblesses    { border-top: 4px solid var(--danger); }
.swot-opportunites  { border-top: 4px solid var(--primary-light); }
.swot-menaces       { border-top: 4px solid var(--warning); }

/* Pied de page */
.site-footer {
    background: var(--gray-800); color: #d1d5db;
    padding: 1.5rem 0; margin-top: 3rem; font-size: 0.85rem;
}
.site-footer p { margin: 0.25rem 0; }

/* Responsive */
@media (max-width: 640px) {
    .main-nav a { display: block; margin: 0.25rem 0; }
    .data-table { font-size: 0.8rem; }
    .data-table th, .data-table td { padding: 0.4rem; }
    .swot-grid { grid-template-columns: 1fr; }
}