/* --- DESIGN D'ORIGINE CONSERVÉ À 100% (repris du modèle fourni) --- */
:root {
  --bg-color: #f0f2f5;
  --card-bg: #ffffff;
  --primary: #2563eb;
  --text-dark: #0f172a;
  --text-light: #64748b;
  --danger: #ef4444;
  --danger-bg: #fee2e2;
  --status-waiting-bg: #fef9c3;
  --status-waiting-text: #854d0e;
  --status-valid-bg: #dcfce7;
  --status-valid-text: #166534;
  --radius: 16px;
  --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Inter', sans-serif; background-color: var(--bg-color); color: var(--text-dark); padding-bottom: 40px; }

/* --- ÉCRAN D'AUTHENTIFICATION --- */
#auth-screen { position: fixed; top:0; left:0; width:100%; height:100%; background:var(--bg-color); z-index:1000; display:flex; align-items:center; justify-content:center; }
.auth-card { background:white; padding:40px; border-radius:var(--radius); box-shadow:var(--shadow); width:90%; max-width:400px; text-align:center; }
.auth-logo { font-size:2rem; font-weight:800; color:var(--primary); margin-bottom:8px; }
.auth-sub { color:var(--text-light); font-weight:600; margin-bottom:20px; font-size:.9rem; }
.auth-tabs { display:flex; gap:8px; margin-bottom:20px; }
.auth-tab { flex:1; padding:10px; border-radius:10px; border:2px solid #e2e8f0; background:white; font-weight:700; cursor:pointer; color:var(--text-light); }
.auth-tab.active { background:var(--primary); color:white; border-color:var(--primary); }
.auth-input { width:100%; padding:15px; border:2px solid #e2e8f0; border-radius:12px; margin-bottom:14px; outline:none; font-size:1rem; text-align:center; font-weight:600; }
.auth-btn { width:100%; padding:15px; background:var(--primary); color:white; border:none; border-radius:12px; font-weight:800; cursor:pointer; transition:opacity .2s; }
.auth-btn:hover { opacity:.9; }

/* --- DASHBOARD --- */
#main-app { display:none; }
header { background:rgba(255,255,255,.95); backdrop-filter:blur(10px); position:sticky; top:0; z-index:100; padding:15px 20px; border-bottom:1px solid #e5e7eb; box-shadow:0 1px 2px rgba(0,0,0,.05); display:flex; align-items:center; gap:12px; flex-wrap:wrap; }
.menu-btn { background:none; border:none; font-size:1.4rem; cursor:pointer; color:var(--primary); padding:4px 8px; }
h1 { font-size:1.25rem; font-weight:800; color:var(--primary); letter-spacing:-0.5px; flex:1; }
#updated-badge { display:none; font-size:.7rem; font-weight:700; background:var(--status-valid-bg); color:var(--status-valid-text); padding:3px 8px; border-radius:20px; }

/* --- MENU LATÉRAL --- */
#menu-overlay { position:fixed; inset:0; background:rgba(0,0,0,.4); z-index:998; display:none; }
#menu-overlay.open { display:block; }
#side-menu { position:fixed; top:0; left:-280px; width:260px; height:100%; background:white; z-index:999; box-shadow:2px 0 10px rgba(0,0,0,.15); transition:left .25s; padding:20px; }
#side-menu.open { left:0; }
#side-menu h2 { color:var(--primary); font-size:1.1rem; margin-bottom:20px; }
.menu-item { display:block; width:100%; text-align:left; padding:12px 10px; border:none; background:none; font-size:.95rem; font-weight:700; color:var(--text-dark); border-radius:8px; cursor:pointer; margin-bottom:4px; }
.menu-item:hover { background:#f1f5f9; }
.menu-item.disabled { color:var(--text-light); cursor:default; font-weight:600; }
.menu-item.disabled:hover { background:none; }
.menu-item .soon { font-size:.7rem; background:#f1f5f9; padding:2px 6px; border-radius:10px; margin-left:6px; }
.menu-logout { margin-top:20px; padding-top:16px; border-top:1px solid #f1f5f9; color:var(--danger); }

/* --- GRILLE CALENDRIER --- */
.calendar-container { max-width:600px; margin:20px auto 0 auto; padding:0 15px; }
.calendar-card { background:var(--card-bg); border-radius:var(--radius); box-shadow:var(--shadow); padding:15px; border:1px solid #e2e8f0; overflow-x:auto; position:relative; }
.calendar-grid { display:grid; gap:4px; min-width:max-content; }
.grid-label-day { font-size:.65rem; font-weight:800; text-align:center; color:var(--text-light); text-transform:uppercase; padding:5px 10px; min-width:90px; }
.grid-label-hour { font-size:.65rem; font-weight:700; color:var(--text-light); display:flex; align-items:center; justify-content:flex-end; padding-right:12px; position:sticky; left:0; background:white; z-index:10; width:45px; }
.corner-cell { position:sticky; left:0; top:0; background:white; z-index:20; }
.grid-cell { height:25px; border-radius:4px; background-color:#f8fafc; border:1px solid #f1f5f9; }
.cell-valid { background-color:#10b981 !important; }
.cell-waiting { background-color:#f59e0b !important; }
.cell-danger { background-color:var(--danger) !important; }
.calendar-legend { display:flex; gap:12px; margin-top:10px; justify-content:center; font-size:.65rem; font-weight:700; color:var(--text-light); }
.legend-item { display:flex; align-items:center; gap:4px; }
.dot { width:8px; height:8px; border-radius:50%; }

/* --- STATS --- */
.stats-container { max-width:600px; margin:15px auto 0 auto; padding:0 15px; display:grid; grid-template-columns:1fr 1fr; gap:15px; }
.stat-card { background:var(--card-bg); padding:15px; border-radius:var(--radius); box-shadow:var(--shadow); text-align:center; border:1px solid #e2e8f0; }
.stat-value { display:block; font-size:1.6rem; font-weight:800; color:var(--primary); }
.stat-label { font-size:.75rem; font-weight:600; color:var(--text-light); text-transform:uppercase; margin-top:4px; }

/* --- FILTRES --- */
.filters-container { display:flex; gap:10px; overflow-x:auto; padding:10px 15px 5px 15px; scrollbar-width:none; width:100%; }
.filters-container::-webkit-scrollbar { display:none; }
.filter-select { padding:8px 12px; border:1px solid #e2e8f0; border-radius:10px; background-color:#f8fafc; color:var(--text-dark); font-size:.85rem; font-weight:600; min-width:120px; cursor:pointer; outline:none; }

/* --- CARTES --- */
.feed-container { max-width:600px; margin:20px auto; padding:0 15px; display:flex; flex-direction:column; gap:20px; }
.card { background:var(--card-bg); border-radius:var(--radius); box-shadow:var(--shadow); padding:20px; position:relative; transition:transform .2s, box-shadow .2s; border:1px solid transparent; animation:fadeIn .5s ease-out; }
.card.status-canceled { background:var(--danger); color:white; }
.card-header { display:flex; justify-content:space-between; align-items:center; margin-bottom:12px; }
.time-badge { font-weight:700; font-size:.9rem; color:var(--primary); }
.card.status-canceled .time-badge { color:white; }
.date-badge { font-size:.85rem; text-transform:uppercase; color:var(--text-light); }
.card.status-canceled .date-badge { color:rgba(255,255,255,.8); }
.card-subject { font-size:1.4rem; font-weight:800; margin-bottom:8px; line-height:1.2; }
.card-teacher { font-size:.95rem; color:var(--text-light); display:flex; align-items:center; gap:6px; margin-bottom:15px; }
.card-footer { display:flex; flex-wrap:wrap; gap:8px; border-top:1px solid #f1f5f9; padding-top:12px; }
.chip { font-size:.75rem; padding:4px 10px; border-radius:20px; background:#f1f5f9; color:var(--text-dark); font-weight:600; }
.chip-waiting { background-color:var(--status-waiting-bg) !important; color:var(--status-waiting-text) !important; }
.chip-valid { background-color:var(--status-valid-bg) !important; color:var(--status-valid-text) !important; }
@keyframes fadeIn { from { opacity:0; transform:translateY(10px); } to { opacity:1; transform:translateY(0); } }

/* --- ÉCRAN RÉGLAGES --- */
.settings-container { max-width:600px; margin:20px auto; padding:0 15px; }
.settings-card { background:var(--card-bg); border-radius:var(--radius); box-shadow:var(--shadow); padding:20px; border:1px solid #e2e8f0; margin-bottom:16px; }
.settings-card h3 { font-size:1rem; margin-bottom:8px; color:var(--text-dark); }
.settings-card p { font-size:.85rem; color:var(--text-light); margin-bottom:12px; line-height:1.4; }