:root {
    --sidebar-bg: #1e293b;
    --sidebar-text: #cbd5e1;
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --success: #16a34a;
    --warning: #d97706;
    --danger: #dc2626;
    --bg: #f1f5f9;
    --card-bg: #ffffff;
    --border: #e2e8f0;
    --text: #0f172a;
    --muted: #64748b;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 14px;
}

.layout { display: flex; min-height: 100vh; }

.sidebar {
    width: 230px;
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0; bottom: 0; left: 0;
}

.sidebar-brand {
    padding: 20px 18px;
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    border-bottom: 1px solid rgba(255,255,255,.08);
}

.sidebar-nav { flex: 1; padding: 12px 10px; display: flex; flex-direction: column; gap: 4px; }

.sidebar-nav a {
    display: block;
    padding: 10px 12px;
    border-radius: 8px;
    color: var(--sidebar-text);
    text-decoration: none;
    font-weight: 500;
}

.sidebar-nav a:hover { background: rgba(255,255,255,.06); color: #fff; }
.sidebar-nav a.active { background: var(--primary); color: #fff; }

.sidebar-footer {
    padding: 14px 18px;
    border-top: 1px solid rgba(255,255,255,.08);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
}

.main {
    flex: 1;
    margin-left: 230px;
    padding: 24px 28px;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    gap: 12px;
    flex-wrap: wrap;
}

.page-header h1 { font-size: 22px; }
.page-actions { display: flex; gap: 8px; }

.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
}

.card h2 { font-size: 18px; margin-bottom: 12px; }
.card h3 { font-size: 15px; margin-bottom: 12px; }

.card-form { max-width: 480px; }

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 14px;
}

.stat-card { display: flex; flex-direction: column; gap: 6px; }
.stat-value { font-size: 30px; font-weight: 700; }
.stat-label { color: var(--muted); font-weight: 500; }
.stat-success .stat-value { color: var(--success); }
.stat-warning .stat-value { color: var(--warning); }
.stat-danger .stat-value { color: var(--danger); }

.table { width: 100%; border-collapse: collapse; }

.table th {
    text-align: left;
    padding: 10px 12px;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: .04em;
    color: var(--muted);
    border-bottom: 2px solid var(--border);
}

.table td { padding: 12px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.table tbody tr:hover { background: #f8fafc; }

.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
}

.badge-success { background: #dcfce7; color: var(--success); }
.badge-info { background: #dbeafe; color: var(--primary); }
.badge-warning { background: #fef3c7; color: var(--warning); }
.badge-danger { background: #fee2e2; color: var(--danger); }
.badge-muted { background: #f1f5f9; color: var(--muted); }

.btn {
    display: inline-block;
    padding: 8px 14px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: #fff;
    color: var(--text);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all .15s ease;
}

.btn:hover { background: var(--bg); }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-success { background: var(--success); border-color: var(--success); color: #fff; }
.btn-danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-block { width: 100%; }
.btn-link { background: none; border: none; color: var(--sidebar-text); cursor: pointer; font-weight: 600; }
.btn-link:hover { color: #fff; }

.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 6px; }

input[type="text"], input[type="email"], input[type="password"],
input[type="number"], select {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    background: #fff;
    color: var(--text);
}

input:focus, select:focus { outline: 2px solid var(--primary); outline-offset: -1px; border-color: var(--primary); }

.filter-bar {
    display: grid;
    grid-template-columns: repeat(3, minmax(140px, 200px)) minmax(200px, 1fr) auto;
    gap: 10px;
    margin-bottom: 18px;
}

.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-weight: 500;
}

.alert ul { margin-left: 18px; }
.alert-success { background: #dcfce7; color: #166534; }
.alert-error { background: #fee2e2; color: #991b1b; }

.detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    align-items: start;
}

.detail-list { display: grid; grid-template-columns: 150px 1fr; row-gap: 10px; margin: 14px 0; }
.detail-list dt { color: var(--muted); font-weight: 500; }
.detail-list dd { font-weight: 500; }

.table-actions { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.text-center { text-align: center; }
.muted { color: var(--muted); }
code { background: var(--bg); padding: 2px 6px; border-radius: 6px; font-size: 13px; }
.mt { margin-top: 14px; }

.pagination { display: flex; gap: 6px; margin-top: 16px; justify-content: center; align-items: center; }
.pagination-page, .pagination-btn {
    padding: 6px 11px;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: #fff;
    text-decoration: none;
    color: var(--text);
}
.pagination-page.active { background: var(--primary); border-color: var(--primary); color: #fff; font-weight: 700; }
.pagination-btn.disabled { opacity: .45; }
.pagination-ellipsis { color: var(--muted); }

.login-body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1e293b 0%, #2563eb 100%);
}

.login-card {
    width: 100%;
    max-width: 380px;
    background: #fff;
    border-radius: 14px;
    padding: 32px;
    box-shadow: 0 20px 50px rgba(0,0,0,.25);
}

.login-card h1 { font-size: 20px; margin-bottom: 4px; }
.login-subtitle { color: var(--muted); margin-bottom: 22px; }

@media (max-width: 900px) {
    .detail-grid { grid-template-columns: 1fr; }
    .filter-bar { grid-template-columns: 1fr 1fr; }
    .sidebar { width: 190px; }
    .main { margin-left: 190px; padding: 18px; }
}