:root {
    --bg: #f1f5f9;
    --surface: #ffffff;
    --text: #0f172a;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --success: #22c55e;
    --danger: #ef4444;
    --warning: #f59e0b;
    --sidebar-width: 260px;
}
[data-theme="dark"] {
    --bg: #0f172a;
    --surface: #1e293b;
    --text: #f1f5f9;
    --text-muted: #94a3b8;
    --border: #334155;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: var(--bg); color: var(--text); line-height: 1.5; }
.admin-layout { display: flex; min-height: 100vh; }
.sidebar { width: var(--sidebar-width); background: var(--surface); border-right: 1px solid var(--border); position: fixed; height: 100vh; overflow-y: auto; }
.sidebar-brand { padding: 1rem 1.25rem; font-weight: 700; display: flex; flex-wrap: wrap; align-items: center; gap: .5rem; border-bottom: 1px solid var(--border); }
.logo { width: 36px; height: 36px; background: var(--primary); color: #fff; border-radius: 8px; display: flex; align-items: center; justify-content: center; font-size: .85rem; }
.sidebar-nav { padding: .5rem 0 1rem; }
.nav-item { display: block; padding: .55rem 1.25rem; color: var(--text-muted); text-decoration: none; transition: all .15s; font-size: .875rem; }
.nav-item:hover { background: var(--bg); color: var(--primary); }
.nav-item.active { background: rgba(37, 99, 235, .1); color: var(--primary); font-weight: 600; border-right: 3px solid var(--primary); }
.nav-subitem { padding-left: 2rem; font-size: .82rem; }
.nav-group { margin: .15rem 0; }
.nav-group-toggle { width: 100%; display: flex; justify-content: space-between; align-items: center; padding: .6rem 1.25rem; background: none; border: none; color: var(--text); font-weight: 600; font-size: .8rem; text-transform: uppercase; letter-spacing: .03em; cursor: pointer; }
.nav-group-toggle:hover { background: var(--bg); color: var(--primary); }
.nav-chevron { transition: transform .2s; font-size: .7rem; opacity: .6; }
.nav-group.is-open .nav-chevron { transform: rotate(180deg); }
.nav-group-items { display: none; padding: .15rem 0; }
.nav-group.is-open .nav-group-items { display: block; }
.sidebar-version { width: 100%; font-size: 11px; opacity: .7; font-weight: 400; margin-left: 2.75rem; }
.sidebar-toggle-mobile { display: none; background: none; border: none; font-size: 1.25rem; cursor: pointer; color: var(--text); }
.sidebar-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,.4); z-index: 90; }
.sidebar-title { flex: 1; }
.main-content { margin-left: var(--sidebar-width); flex: 1; display: flex; flex-direction: column; }
.topbar { background: var(--surface); border-bottom: 1px solid var(--border); padding: .75rem 1.5rem; display: flex; justify-content: flex-end; align-items: center; gap: 1rem; }
.page-content { padding: 1.5rem; flex: 1; }
.page-header { margin-bottom: 1.5rem; }
.page-header h1 { font-size: 1.5rem; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 1.5rem; }
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 1rem; margin-bottom: 1.5rem; }
.stat-card { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 1.25rem; text-align: center; }
.stat-value { font-size: 1.75rem; font-weight: 700; color: var(--primary); }
.stat-label { font-size: .85rem; color: var(--text-muted); margin-top: .25rem; }
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.5rem; }
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { padding: .75rem; text-align: left; border-bottom: 1px solid var(--border); }
.table th { font-weight: 600; color: var(--text-muted); font-size: .85rem; }
.btn { display: inline-block; padding: .5rem 1rem; border: 1px solid var(--border); border-radius: 6px; background: var(--surface); color: var(--text); text-decoration: none; cursor: pointer; font-size: .875rem; transition: all .15s; }
.btn:hover { border-color: var(--primary); color: var(--primary); }
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-hover); color: #fff; }
.btn-success { background: var(--success); color: #fff; border-color: var(--success); }
.btn-danger { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn-warning { background: var(--warning); color: #fff; border-color: var(--warning); }
.btn-sm { padding: .3rem .6rem; font-size: .8rem; }
.btn-block { width: 100%; }
.btn-icon { background: none; border: none; font-size: 1.25rem; cursor: pointer; }
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: .35rem; font-weight: 500; font-size: .875rem; }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: .5rem .75rem; border: 1px solid var(--border); border-radius: 6px; background: var(--bg); color: var(--text); font-size: .875rem; }
.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; }
.form-actions { margin-top: 1.5rem; display: flex; gap: .75rem; }
.filter-bar { display: flex; gap: .75rem; margin-bottom: 1rem; flex-wrap: wrap; align-items: center; }
.alert { padding: .75rem 1rem; border-radius: 6px; margin-bottom: 1rem; }
.alert-success { background: #dcfce7; color: #166534; border: 1px solid #bbf7d0; }
.alert-error { background: #fee2e2; color: #991b1b; border: 1px solid #fecaca; }
.alert-info { background: #dbeafe; color: #1e40af; border: 1px solid #bfdbfe; }
[data-theme="dark"] .alert-success { background: #14532d; color: #bbf7d0; }
[data-theme="dark"] .alert-error { background: #7f1d1d; color: #fecaca; }
.badge { padding: .2rem .5rem; border-radius: 4px; font-size: .75rem; font-weight: 600; }
.badge-success { background: #dcfce7; color: #166534; }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-error { background: #fee2e2; color: #991b1b; }
.badge-muted { background: var(--bg); color: var(--text-muted); }
.text-muted { color: var(--text-muted); font-size: .85rem; }
.code-block, .code-input { font-family: monospace; background: var(--bg); padding: 1rem; border-radius: 6px; overflow-x: auto; font-size: .85rem; }
.checkbox-label { display: block; margin: .5rem 0; }
.user-menu { display: flex; align-items: center; gap: 1rem; }
.user-menu a { color: var(--text); text-decoration: none; }
.guest-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-container { width: 100%; max-width: 400px; padding: 1rem; }
.login-box { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 2rem; }
.login-box h1 { margin-bottom: .5rem; }
.subtitle { color: var(--text-muted); margin-bottom: 1.5rem; }
.variant-block { border: 1px solid var(--border); border-radius: 8px; padding: 1rem; margin: 1rem 0; }
.asset-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 1rem; }
.asset-item img { width: 100%; height: 120px; object-fit: cover; border-radius: 6px; }
.asset-item p { font-size: .8rem; margin: .5rem 0; }
.domain-list { list-style: none; margin: .5rem 0 1rem; }
.domain-list li { padding: .25rem 0; }
.tab-nav { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: 1rem; border-bottom: 1px solid var(--border); padding-bottom: .5rem; }
.tab-link { padding: .5rem 1rem; text-decoration: none; color: var(--text-muted); border-radius: 6px 6px 0 0; }
.tab-link:hover, .tab-link.active { color: var(--primary); background: var(--surface); border: 1px solid var(--border); border-bottom-color: var(--surface); margin-bottom: -1px; }
.actions-cell { white-space: nowrap; }
.actions-cell form { display: inline-block; margin: .1rem; }
@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); z-index: 100; transition: transform .2s; }
    .sidebar.is-open { transform: translateX(0); }
    .sidebar-overlay.is-visible { display: block; }
    .sidebar-toggle-mobile { display: inline-block; }
    .main-content { margin-left: 0; }
    .nav-group-items { display: none; }
    .nav-group.is-open .nav-group-items { display: block; }
}