/* === SoriTune Coach System === */
:root {
    --bg: #f8f9fa;
    --surface: #ffffff;
    --border: #dee2e6;
    --text: #212529;
    --muted: #6c757d;
    --primary: #4361ee;
    --primary-light: #e8ecff;
    --success: #198754;
    --success-light: #d1e7dd;
    --warning: #ffc107;
    --warning-light: #fff3cd;
    --danger: #dc3545;
    --danger-light: #f8d7da;
    --info: #0dcaf0;
    --info-light: #cff4fc;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: var(--bg); color: var(--text); line-height: 1.5; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Layout */
.navbar { background: var(--primary); color: #fff; padding: 0 24px; display: flex; align-items: center; height: 56px; gap: 24px; box-shadow: var(--shadow-md); position: sticky; top: 0; z-index: 100; }
.navbar .brand { font-weight: 700; font-size: 16px; letter-spacing: 0.5px; }
.navbar nav { display: flex; gap: 4px; }
.navbar nav a { color: rgba(255,255,255,0.8); padding: 8px 14px; border-radius: 6px; font-size: 14px; font-weight: 500; transition: all 0.15s; }
.navbar nav a:hover, .navbar nav a.active { color: #fff; background: rgba(255,255,255,0.15); text-decoration: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 24px; }
.container-wide { max-width: 1400px; margin: 0 auto; padding: 24px; }

/* Cards */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }
.card-header { padding: 16px 20px; border-bottom: 1px solid var(--border); font-weight: 600; font-size: 15px; display: flex; align-items: center; justify-content: space-between; }
.card-body { padding: 20px; }

/* Tables */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { background: #f1f3f5; font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.5px; color: var(--muted); position: sticky; top: 0; }
tr:hover td { background: #f8f9fa; }

/* Badges */
.badge { display: inline-block; padding: 3px 10px; border-radius: 12px; font-size: 12px; font-weight: 600; }
.badge-ap { background: #ffd700; color: #333; }
.badge-a { background: #c0c0c0; color: #333; }
.badge-b { background: #cd7f32; color: #fff; }
.badge-c { background: var(--info-light); color: #087990; }
.badge-d { background: #e9ecef; color: var(--muted); }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-weight: 600; font-size: 13px; margin-bottom: 4px; color: var(--muted); }
.form-control { width: 100%; padding: 8px 12px; border: 1px solid var(--border); border-radius: var(--radius); font-size: 14px; transition: border-color 0.15s; }
.form-control:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(67,97,238,0.15); }
select.form-control { appearance: auto; }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; border: none; border-radius: var(--radius); font-size: 14px; font-weight: 500; cursor: pointer; transition: all 0.15s; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: #3651d4; }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #157347; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #bb2d3b; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-outline:hover { background: #f1f3f5; }
.btn-sm { padding: 5px 10px; font-size: 13px; }
.btn-lg { padding: 12px 24px; font-size: 16px; }

/* Alerts */
.alert { padding: 12px 16px; border-radius: var(--radius); margin-bottom: 16px; font-size: 14px; }
.alert-success { background: var(--success-light); color: #0f5132; border: 1px solid #badbcc; }
.alert-danger { background: var(--danger-light); color: #842029; border: 1px solid #f5c2c7; }
.alert-warning { background: var(--warning-light); color: #664d03; border: 1px solid #ffecb5; }
.alert-info { background: var(--info-light); color: #055160; border: 1px solid #b6effb; }

/* Summary cards */
.summary-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 24px; }
.summary-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); }
.summary-card .label { font-size: 12px; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; }
.summary-card .value { font-size: 28px; font-weight: 700; margin-top: 4px; }

/* Utility */
.text-right { text-align: right; }
.text-center { text-align: center; }
.text-muted { color: var(--muted); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 16px; }
.mb-4 { margin-bottom: 24px; }
.mt-3 { margin-top: 16px; }
.mt-4 { margin-top: 24px; }
.d-flex { display: flex; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 16px; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }

/* Responsive */
@media (max-width: 768px) {
    .container, .container-wide { padding: 12px; }
    .navbar { padding: 0 12px; gap: 12px; }
    .navbar nav a { padding: 6px 10px; font-size: 13px; }
    .summary-grid { grid-template-columns: repeat(2, 1fr); }
}