:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #1e293b;
    --bg-hover: #334155;
    --bg-input: #0f172a;
    --border: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #06b6d4;
}

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

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

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; }

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

.sidebar {
    width: 260px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    position: fixed;
    top: 0; left: 0; bottom: 0;
    display: flex;
    flex-direction: column;
    z-index: 100;
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid var(--border);
}

.sidebar-header h1 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}

.sidebar-header small {
    color: var(--text-muted);
    font-size: 12px;
}

.sidebar-nav { flex: 1; padding: 12px 0; overflow-y: auto; }

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 20px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    transition: all 0.15s;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
    text-decoration: none;
}

.nav-item.active {
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent);
    border-left-color: var(--accent);
}

.nav-item svg { width: 20px; height: 20px; flex-shrink: 0; }

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border);
}

.main-content {
    flex: 1;
    margin-left: 260px;
    padding: 32px;
    min-height: 100vh;
}

/* Page header */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

.page-header h2 {
    font-size: 24px;
    font-weight: 700;
}

.page-header p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-top: 4px;
}

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 24px;
}

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

.card-header h3 {
    font-size: 16px;
    font-weight: 600;
}

/* Stat cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    transition: border-color 0.2s;
}

.stat-card:hover { border-color: var(--accent); }

.stat-card .label {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.stat-card .value {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
}

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

.stat-card .sub .up { color: var(--success); }
.stat-card .sub .down { color: var(--danger); }

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

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

th {
    text-align: left;
    padding: 12px 16px;
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
}

tr:hover td { background: var(--bg-hover); }
tr:last-child td { border-bottom: none; }

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 9999px;
    font-size: 12px;
    font-weight: 600;
}

.badge-success { background: rgba(34,197,94,0.15); color: var(--success); }
.badge-danger { background: rgba(239,68,68,0.15); color: var(--danger); }
.badge-warning { background: rgba(245,158,11,0.15); color: var(--warning); }
.badge-info { background: rgba(6,182,212,0.15); color: var(--info); }
.badge-neutral { background: rgba(100,116,139,0.15); color: var(--text-muted); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
}

.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { background: #dc2626; }
.btn-sm { padding: 5px 12px; font-size: 13px; }
.btn-ghost { background: transparent; color: var(--text-secondary); border: 1px solid var(--border); }
.btn-ghost:hover { background: var(--bg-hover); color: var(--text-primary); }

/* Forms */
.form-group { margin-bottom: 16px; }

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
    transition: border-color 0.15s;
}

.form-control:focus { border-color: var(--accent); }

.form-inline {
    display: flex;
    gap: 12px;
    align-items: end;
}

.form-inline .form-group { margin-bottom: 0; }

/* Pagination */
.pagination {
    display: flex;
    gap: 4px;
    justify-content: center;
    margin-top: 20px;
}

.pagination a, .pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    transition: all 0.15s;
}

.pagination a:hover { background: var(--bg-hover); text-decoration: none; }
.pagination .active { background: var(--accent); color: white; border-color: var(--accent); }

/* Status dot */
.status-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: 6px;
}

.status-dot.online { background: var(--success); box-shadow: 0 0 6px rgba(34,197,94,0.5); }
.status-dot.offline { background: var(--danger); box-shadow: 0 0 6px rgba(239,68,68,0.5); }
.status-dot.warning { background: var(--warning); }

/* Grid layouts */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 24px; }

/* Login page */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
}

.login-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 40px;
    width: 100%;
    max-width: 400px;
}

.login-card h1 {
    font-size: 24px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 8px;
}

.login-card p {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 32px;
    font-size: 14px;
}

.error-msg {
    background: rgba(239,68,68,0.1);
    border: 1px solid rgba(239,68,68,0.3);
    color: var(--danger);
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 14px;
    margin-bottom: 16px;
}

/* Token display */
.token-code {
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 14px;
    background: var(--bg-primary);
    padding: 4px 10px;
    border-radius: 6px;
    letter-spacing: 0.05em;
}

/* Modal */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal-overlay.active { display: flex; }

.modal {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 32px;
    width: 90%;
    max-width: 480px;
}

.modal h3 { margin-bottom: 20px; }

.modal-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 24px;
}

/* Detail page */
.detail-grid {
    display: grid;
    grid-template-columns: 160px 1fr;
    gap: 8px 16px;
    font-size: 14px;
}

.detail-grid dt {
    color: var(--text-muted);
    font-weight: 500;
}

.detail-grid dd {
    color: var(--text-primary);
    word-break: break-all;
}

/* Responsive */
@media (max-width: 1024px) {
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .sidebar { display: none; }
    .main-content { margin-left: 0; padding: 16px; }
    .stats-grid { grid-template-columns: 1fr; }
    .form-inline { flex-direction: column; }
}

/* Chart placeholder */
.chart-container {
    height: 200px;
    display: flex;
    align-items: flex-end;
    gap: 4px;
    padding: 20px 0;
}

.chart-bar {
    flex: 1;
    background: var(--accent);
    border-radius: 4px 4px 0 0;
    min-height: 4px;
    position: relative;
    transition: opacity 0.2s;
}

.chart-bar:hover { opacity: 0.8; }

.chart-bar .chart-tooltip {
    display: none;
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-primary);
    border: 1px solid var(--border);
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 11px;
    white-space: nowrap;
    margin-bottom: 4px;
}

.chart-bar:hover .chart-tooltip { display: block; }

.chart-labels {
    display: flex;
    gap: 4px;
    margin-top: 8px;
}

.chart-labels span {
    flex: 1;
    text-align: center;
    font-size: 11px;
    color: var(--text-muted);
}

/* Misc */
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 13px; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mb-4 { margin-bottom: 16px; }
.flex { display: flex; }
.gap-2 { gap: 8px; }
.gap-4 { gap: 16px; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 200px; }