:root {
    --bg: #0f0f0f; --bg2: #1a1a1a; --bg3: #242424;
    --border: #2e2e2e; --text: #f0f0f0; --text2: #888; --text3: #444;
    --gold: #c9a84c; --green: #22c55e; --red: #ef4444; --blue: #3b82f6;
    --radius: 6px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; }
a { color: var(--gold); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Navbar */
.navbar { background: var(--bg); border-bottom: 1px solid var(--border); padding: 0 24px; height: 52px; display: flex; align-items: center; gap: 16px; position: sticky; top: 0; z-index: 100; }
.nav-brand { font-weight: 700; font-size: 16px; color: var(--gold); }
.nav-brand a { color: inherit; text-decoration: none; }
.nav-links { display: flex; gap: 4px; flex: 1; }
.nav-links a { padding: 6px 12px; border-radius: var(--radius); font-size: 13px; color: var(--text2); text-decoration: none; transition: background .15s, color .15s; }
.nav-links a:hover, .nav-links a.active { background: var(--bg3); color: var(--text); text-decoration: none; }
.nav-right { margin-left: auto; display: flex; align-items: center; gap: 12px; }

/* Layout */
.container { max-width: 1100px; margin: 0 auto; padding: 32px 20px; }
.page-title { font-size: 20px; font-weight: 700; margin-bottom: 24px; display: flex; align-items: center; justify-content: space-between; gap: 12px; }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; border-radius: var(--radius); border: 1px solid transparent; cursor: pointer; font-size: 13px; font-weight: 500; text-decoration: none; background: none; transition: opacity .15s; }
.btn:hover { opacity: .8; text-decoration: none; }
.btn-primary { background: var(--gold); color: #000; border-color: var(--gold); }
.btn-secondary { background: var(--bg3); color: var(--text); border-color: var(--border); }
.btn-danger { background: transparent; color: var(--red); border-color: var(--red); }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-full { width: 100%; justify-content: center; }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: .05em; color: var(--text2); margin-bottom: 6px; }
input[type=text], input[type=email], input[type=password], input[type=number], input[type=datetime-local], select, textarea {
    width: 100%; padding: 10px 12px; background: var(--bg2); border: 1px solid var(--border);
    border-radius: var(--radius); color: var(--text); font-size: 14px; outline: none; transition: border .15s; font-family: inherit;
}
input::placeholder, textarea::placeholder { color: var(--text3); }
input:focus, select:focus, textarea:focus { border-color: var(--gold); }
select option { background: var(--bg2); }
textarea { resize: vertical; min-height: 80px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }

/* Alerts */
.alert { padding: 12px 16px; border-radius: var(--radius); margin-bottom: 16px; font-size: 14px; border-left: 3px solid; }
.alert-error   { background: #1a0a0a; color: var(--red);   border-color: var(--red); }
.alert-success { background: #0a1a0f; color: var(--green); border-color: var(--green); }

/* Cards / Tables */
.card { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin-bottom: 16px; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th { text-align: left; padding: 10px 12px; font-size: 11px; text-transform: uppercase; letter-spacing: .05em; color: var(--text2); border-bottom: 1px solid var(--border); font-weight: 600; }
td { padding: 12px; border-bottom: 1px solid var(--border); color: var(--text); vertical-align: middle; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--bg3); }

/* Stats */
.stats-row { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 12px; margin-bottom: 28px; }
.stat-card { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 20px; }
.stat-val { font-size: 28px; font-weight: 700; color: var(--gold); line-height: 1; }
.stat-label { font-size: 11px; color: var(--text2); text-transform: uppercase; letter-spacing: .05em; margin-top: 4px; }

/* Badges */
.badge { display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: .03em; }
.badge-green  { background: #0a1a0f; color: var(--green); }
.badge-gold   { background: #2a1a00; color: var(--gold); }
.badge-red    { background: #1a0a0a; color: var(--red); }
.badge-gray   { background: var(--bg3); color: var(--text2); }

/* Auth */
.auth-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; padding: 24px; background: url('/assets/bg-yoga.jpg') center center / cover no-repeat; position: relative; }
.auth-page::before { content:''; position:absolute; inset:0; background: linear-gradient(to right, rgba(0,0,0,.75) 40%, rgba(0,0,0,.2) 100%); }
.auth-box { width: 100%; max-width: 380px; position: relative; z-index: 1; }
.auth-box h1 { font-size: 24px; font-weight: 700; color: var(--gold); margin-bottom: 4px; }
.auth-sub { color: var(--text2); font-size: 14px; margin-bottom: 32px; }
.auth-switch { font-size: 13px; margin-top: 20px; color: var(--text2); }

/* Modal */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.7); z-index: 200; display: flex; align-items: center; justify-content: center; padding: 20px; }
.modal { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; width: 100%; max-width: 480px; }
.modal h2 { font-size: 17px; margin-bottom: 20px; }
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 20px; }

/* Cours card */
.cours-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 12px; }
.cours-card { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; border-left: 3px solid var(--gold); }
.cours-card h3 { font-size: 15px; margin-bottom: 6px; }
.cours-meta { font-size: 12px; color: var(--text2); display: flex; flex-direction: column; gap: 3px; margin-bottom: 12px; }
.cours-actions { display: flex; gap: 8px; }
.cours-capacite { font-size: 12px; color: var(--text2); }
.cours-capacite span { color: var(--gold); font-weight: 600; }

/* Empty */
.empty { text-align: center; padding: 60px 20px; color: var(--text3); }
.empty p { font-size: 15px; margin-top: 8px; }

@media (max-width: 640px) {
    .container { padding: 16px; }
    .form-row, .form-row-3 { grid-template-columns: 1fr; }
    .nav-links { display: none; }
    .stats-row { grid-template-columns: repeat(2, 1fr); }
}