:root {
    --bg-primary: #000000;
    --bg-secondary: #0a0a0f;
    --bg-card: #111118;
    --bg-card-hover: #16161f;
    --bg-input: #1a1a24;
    --border: #1e1e2e;
    --border-hover: #2a2a3e;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b8;
    --text-muted: #6b6b80;
    --accent-cyan: #0aeacb;
    --accent-cyan-dim: rgba(10, 234, 203, 0.15);
    --accent-purple: #8b5cf6;
    --accent-purple-dim: rgba(139, 92, 246, 0.15);
    --accent-magenta: #a855f7;
    --success: #22c55e;
    --error: #ef4444;
    --warning: #f59e0b;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.5;
}

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

a:hover {
    color: #fff;
}

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

.sidebar {
    width: 240px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    padding: 24px 0;
    flex-shrink: 0;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    overflow-y: auto;
}

.sidebar-brand {
    padding: 0 24px 24px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 16px;
}

.sidebar-brand h1 {
    font-size: 20px;
    font-weight: 300;
    letter-spacing: 0.05em;
}

.sidebar-brand h1 strong {
    font-weight: 700;
}

.sidebar-brand .subtitle {
    font-size: 11px;
    color: var(--accent-cyan);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-top: 4px;
}

.sidebar nav {
    padding: 0 12px;
}

.sidebar nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 14px;
    transition: all 0.15s;
}

.sidebar nav a:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}

.sidebar nav a.active {
    background: var(--accent-cyan-dim);
    color: var(--accent-cyan);
}

.sidebar nav a .icon {
    width: 18px;
    text-align: center;
    font-size: 16px;
}

.sidebar-footer {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 16px 24px;
    border-top: 1px solid var(--border);
}

.sidebar-footer a {
    color: var(--text-muted);
    font-size: 13px;
}

.main {
    flex: 1;
    margin-left: 240px;
    padding: 32px;
    max-width: 1200px;
}

.page-header {
    margin-bottom: 32px;
}

.page-header h2 {
    font-size: 24px;
    font-weight: 600;
}

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

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 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 0.15s;
}

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

.stat-card .label {
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 8px;
}

.stat-card .value {
    font-size: 28px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-card .value.small {
    font-size: 20px;
}

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

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 24px;
}

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.table-wrap {
    overflow-x: auto;
}

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

thead th {
    text-align: left;
    padding: 12px 16px;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 11px;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

tbody td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

tbody tr:hover {
    background: var(--bg-card-hover);
}

tbody tr:last-child td {
    border-bottom: none;
}

.mono {
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 12px;
}

.tx-link {
    color: var(--accent-cyan);
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 12px;
}

.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-success {
    background: rgba(34, 197, 94, 0.15);
    color: var(--success);
}

.badge-error {
    background: rgba(239, 68, 68, 0.15);
    color: var(--error);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.15);
    color: var(--warning);
}

.badge-info {
    background: var(--accent-cyan-dim);
    color: var(--accent-cyan);
}

.form-group {
    margin-bottom: 20px;
}

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

.form-group input,
.form-group select {
    width: 100%;
    max-width: 360px;
    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-group input:focus,
.form-group select:focus {
    border-color: var(--accent-cyan);
}

.form-group .hint {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: all 0.15s;
}

.btn-primary {
    background: var(--accent-cyan);
    color: #000;
}

.btn-primary:hover {
    background: #0dd6b8;
}

.btn-secondary {
    background: var(--bg-input);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    border-color: var(--border-hover);
}

.toggle-switch {
    display: flex;
    align-items: center;
    gap: 12px;
}

.toggle-switch input[type="checkbox"] {
    appearance: none;
    width: 44px;
    height: 24px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 12px;
    position: relative;
    cursor: pointer;
    transition: all 0.2s;
}

.toggle-switch input[type="checkbox"]::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 18px;
    height: 18px;
    background: var(--text-muted);
    border-radius: 50%;
    transition: all 0.2s;
}

.toggle-switch input[type="checkbox"]:checked {
    background: var(--accent-cyan-dim);
    border-color: var(--accent-cyan);
}

.toggle-switch input[type="checkbox"]:checked::after {
    left: 22px;
    background: var(--accent-cyan);
}

.toggle-switch .toggle-label {
    font-size: 14px;
    color: var(--text-secondary);
}

.flash {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
}

.flash-success {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
    color: var(--success);
}

.flash-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--error);
}

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

.login-box {
    width: 100%;
    max-width: 400px;
    padding: 40px;
}

.login-box .brand {
    text-align: center;
    margin-bottom: 40px;
}

.login-box .brand h1 {
    font-size: 28px;
    font-weight: 300;
}

.login-box .brand h1 strong {
    font-weight: 700;
}

.login-box .brand p {
    color: var(--accent-cyan);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-top: 8px;
}

.login-box .form-group input {
    max-width: 100%;
}

.login-box .btn {
    width: 100%;
    justify-content: center;
    padding: 12px;
    font-size: 15px;
}

.empty-state {
    padding: 48px;
    text-align: center;
    color: var(--text-muted);
}

.empty-state p {
    font-size: 14px;
}

.node-tag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
    background: var(--accent-purple-dim);
    color: var(--accent-purple);
}

.per-node-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
    margin-top: 16px;
}

.per-node-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 16px;
}

.per-node-card h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--accent-purple);
}

.per-node-card .stat-row {
    display: flex;
    justify-content: space-between;
    padding: 6px 0;
    font-size: 13px;
}

.per-node-card .stat-row .stat-label {
    color: var(--text-muted);
}

.per-node-card .stat-row .stat-value {
    color: var(--text-primary);
    font-weight: 500;
}

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