:root {
    --bg: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --border: #e5e7eb;
    --border-light: #f0f0f0;
    --text: #111827;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --accent: #D97757;
    --accent-hover: #C4654A;
    --accent-light: #FEF3EF;
    --success: #22c55e;
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --radius: 10px;
    --radius-sm: 6px;
    --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.06), 0 1px 3px rgba(0,0,0,0.04);
}

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

body {
    background: var(--bg-secondary);
    font-family: 'SiteFont', Inter, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--text);
    min-height: 100vh;
}

/* Header */
.admin-header {
    background: var(--bg);
    box-shadow: var(--shadow);
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 10;
}

.admin-header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.admin-logo-text {
    font-size: 18px;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: -0.02em;
}

.admin-header h1 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-secondary);
}

.admin-header-right {
    display: flex;
    align-items: center;
    gap: 10px;
}

.admin-user {
    font-size: 13px;
    color: var(--text-secondary);
}

.admin-btn {
    padding: 6px 14px;
    font-size: 13px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg);
    color: var(--text);
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s;
}

.admin-btn:hover { background: var(--bg-tertiary); }

.admin-btn-danger {
    color: var(--danger);
    border-color: var(--danger);
}

.admin-btn-danger:hover {
    background: var(--danger);
    color: #fff;
}

/* Content */
.admin-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.admin-card {
    background: var(--bg);
    border-radius: 12px;
    padding: 24px;
    box-shadow: var(--shadow-md);
}

.admin-card h2 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 16px;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
}

.stat-item {
    background: var(--bg-secondary);
    border-radius: var(--radius);
    padding: 16px;
    text-align: center;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--accent);
    line-height: 1.2;
}

.stat-label {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* Tables */
.table-wrap { overflow-x: auto; }

.admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.admin-table th,
.admin-table td {
    padding: 11px 14px;
    text-align: left;
    border-bottom: 1px solid var(--border-light);
    white-space: nowrap;
}

.admin-table th {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 12px;
    background: transparent;
    border-bottom: 2px solid var(--border);
}

.admin-table tbody tr:hover { background: var(--bg-secondary); }

.admin-table .tag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 500;
}

.admin-table .tag-admin {
    background: var(--accent-light);
    color: var(--accent);
}

.admin-table .tag-user {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

.table-empty {
    padding: 24px;
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
}

.btn-sm {
    padding: 4px 10px;
    font-size: 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg);
    color: var(--text);
    cursor: pointer;
    transition: all 0.15s;
}

.btn-sm:hover { background: var(--bg-tertiary); }

.btn-sm-danger {
    color: var(--danger);
    border-color: var(--danger);
}

.btn-sm-danger:hover {
    background: var(--danger);
    color: #fff;
}

/* Settings Form */
.settings-form {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.settings-row {
    display: flex;
    align-items: center;
    gap: 12px;
}

.settings-row label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    min-width: 80px;
    flex-shrink: 0;
}

.settings-input-group {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
}

.settings-input-group input,
.settings-input-group select,
.settings-input-group textarea {
    flex: 1;
    padding: 8px 12px;
    font-size: 13px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg);
    color: var(--text);
    outline: none;
    transition: border-color 0.2s;
    font-family: inherit;
}

.settings-input-group input:focus,
.settings-input-group select:focus,
.settings-input-group textarea:focus {
    border-color: var(--accent);
}

.settings-input-group textarea {
    resize: vertical;
    line-height: 1.5;
}

.btn-sm-save {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
    font-weight: 500;
}

.btn-sm-save:hover {
    background: var(--accent-hover);
    color: #fff;
}

.settings-hint { font-size: 13px; color: var(--text-secondary); white-space: nowrap; }

.settings-status { font-size: 12px; white-space: nowrap; }
.settings-status-ok { color: var(--success); }
.settings-status-err { color: var(--danger); }

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
}

.dash-item {
    background: var(--bg-secondary);
    border-radius: var(--radius);
    padding: 14px 16px;
}

.dash-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 8px;
}

.dash-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
}

.dash-value {
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
}

.dash-sub {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 6px;
}

/* Progress Bar */
.progress-bar {
    width: 100%;
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.6s ease, background 0.3s;
}

.progress-cpu { background: var(--accent); }
.progress-mem { background: #3b82f6; }
.progress-disk { background: #8b5cf6; }
.progress-swap { background: #f59e0b; }
.progress-fill.progress-warn { background: #f59e0b; }
.progress-fill.progress-danger { background: var(--danger); }

/* System Info Extra */
.sysinfo-extra {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
    font-size: 12px;
    color: var(--text-secondary);
}

.sysinfo-tag {
    background: var(--bg-secondary);
    border-radius: 4px;
    padding: 3px 8px;
    font-size: 11px;
    font-family: 'SF Mono', 'Cascadia Code', Consolas, monospace;
}

/* Tabs */
.tab-bar {
    display: flex;
    border-bottom: 2px solid var(--border);
    margin-bottom: 16px;
}

.tab-btn {
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-muted);
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    cursor: pointer;
    transition: all 0.15s;
}

.tab-btn:hover { color: var(--text); }

.tab-btn.tab-active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

.tab-panel { display: none; }
.tab-panel-active { display: block; }

/* Mobile */
@media (max-width: 768px) {
    .admin-header {
        flex-direction: column;
        gap: 10px;
        padding: 12px 16px;
    }
    .admin-header-right { flex-wrap: wrap; justify-content: center; gap: 8px; }
    .admin-content { padding: 16px; }
    .admin-card { padding: 16px; }
    .stats-grid, .dashboard-grid { grid-template-columns: repeat(2, 1fr); }
    .settings-row { flex-direction: column; align-items: flex-start; }
    .settings-row label { min-width: auto; }
    .settings-input-group { width: 100%; }
}

@media (max-width: 480px) {
    .stats-grid, .dashboard-grid { grid-template-columns: 1fr; }
}