:root {
  --bg: #f5f6f8; --card: #fff; --text: #1d2330; --muted: #667085;
  --border: #dde1e7; --accent: #2457d6; --danger: #c62828; --ok: #1b7f3b;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, "Segoe UI", sans-serif; background: var(--bg); color: var(--text); }
a { color: var(--accent); }

/* Connexion */
.login { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login .card { width: 100%; max-width: 380px; padding: 28px; }
.login h1 { margin: 0 0 4px; font-size: 1.5rem; }
.login label { display: block; margin-bottom: 14px; font-size: .95rem; }
.login input { display: block; width: 100%; margin-top: 4px; padding: 10px; border: 1px solid var(--border);
  border-radius: 6px; font: inherit; }
.login button { width: 100%; padding: 10px; border: 0; border-radius: 6px; background: var(--accent); color: #fff;
  font: inherit; cursor: pointer; }

.card { background: var(--card); border: 1px solid var(--border); border-radius: 10px; }
.hint { color: var(--muted); margin: 0 0 20px; }
.flash { padding: 10px 14px; border-radius: 6px; margin-bottom: 16px; }
.flash.error { background: #fdecea; color: var(--danger); }
.flash.success { background: #e8f5ec; color: var(--ok); }

/* Accueil */
.topbar { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; justify-content: space-between;
  padding: 12px 24px; background: var(--card); border-bottom: 1px solid var(--border); }
.brand { font-weight: 700; }
.topbar nav { display: flex; gap: 16px; align-items: center; }
.who { color: var(--muted); }

.wide { max-width: 1000px; margin: 28px auto; padding: 0 16px; }
.wide h1 { font-size: 1.4rem; margin: 28px 0 12px; }
.wide h1:first-child { margin-top: 0; }
.periode { padding: 18px 20px; margin-bottom: 16px; }
.periode-tete { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.periode h2 { margin: 0; font-size: 1.15rem; }
.periode .hint { margin: 0; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.bouton { display: inline-block; padding: 8px 14px; border-radius: 6px; background: var(--accent); color: #fff;
  text-decoration: none; font-size: .95rem; }
.bouton:hover { background: #1c47b3; }
.manque { color: var(--danger); font-size: .9rem; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .95rem; }
th, td { text-align: left; padding: 9px 8px; border-bottom: 1px solid var(--border); vertical-align: middle; }
th { color: var(--muted); font-weight: 600; font-size: .85rem; }
td.eleve { font-weight: 600; }
td a { margin-right: 8px; }
.date { color: var(--muted); font-size: .85rem; white-space: nowrap; }
.vide { color: #b0b6c0; }