:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #1e293b;
    --bg-card-hover: #334155;
    --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;
}

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

/* Sidebar */
.sidebar {
    width: 260px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
    transition: transform 0.3s;
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.sidebar-header h1 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: -0.02em;
}

.sidebar-header small {
    color: var(--text-muted);
    font-size: 0.75rem;
}

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

.nav-section {
    padding: 0.5rem 1.5rem;
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.65rem 1.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: all 0.15s;
    border-left: 3px solid transparent;
}

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

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

.nav-link svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

/* Main content */
.main-content {
    flex: 1;
    margin-left: 260px;
    padding: 2rem;
    min-height: 100vh;
}

.page-header {
    margin-bottom: 2rem;
}

.page-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.page-header p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Cards & Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.25rem;
    transition: border-color 0.15s;
}

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

.stat-card .label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.stat-card .value {
    font-size: 1.75rem;
    font-weight: 700;
    line-height: 1;
}

.stat-card .sub {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.35rem;
}

/* Progress bar */
.progress-bar {
    width: 100%;
    height: 6px;
    background: var(--bg-primary);
    border-radius: 3px;
    margin-top: 0.75rem;
    overflow: hidden;
}

.progress-bar .fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.5s ease;
}

.fill-blue { background: var(--accent); }
.fill-green { background: var(--success); }
.fill-yellow { background: var(--warning); }
.fill-red { background: var(--danger); }

/* Tables */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    margin-bottom: 1.5rem;
    overflow: hidden;
}

.card-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h3 {
    font-size: 0.95rem;
    font-weight: 600;
}

.card-body {
    padding: 1.25rem;
}

.card-body.no-pad {
    padding: 0;
}

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

th {
    text-align: left;
    padding: 0.75rem 1.25rem;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
    background: rgba(0,0,0,0.15);
}

td {
    padding: 0.75rem 1.25rem;
    font-size: 0.875rem;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}

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

tr:hover td {
    background: rgba(255,255,255,0.02);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.2rem 0.6rem;
    border-radius: 9999px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.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(148, 163, 184, 0.15);
    color: var(--text-secondary);
}

.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    display: inline-block;
}

.badge-dot.green { background: var(--success); }
.badge-dot.red { background: var(--danger); }
.badge-dot.yellow { background: var(--warning); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.45rem 0.9rem;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.15s;
    text-decoration: none;
}

.btn:hover { background: var(--bg-card-hover); }
.btn-primary { background: var(--accent); border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-hover); }
.btn-danger { background: var(--danger); border-color: var(--danger); color: white; }
.btn-danger:hover { opacity: 0.85; }
.btn-success { background: var(--success); border-color: var(--success); color: white; }
.btn-sm { padding: 0.3rem 0.6rem; font-size: 0.7rem; }

.btn-group {
    display: flex;
    gap: 0.4rem;
}

/* Code / Logs */
.log-viewer {
    background: #0d1117;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 0.75rem;
    line-height: 1.6;
    color: #c9d1d9;
    max-height: 400px;
    overflow-y: auto;
    white-space: pre-wrap;
    word-break: break-all;
}

/* Config editor */
.config-editor {
    width: 100%;
    min-height: 400px;
    background: #0d1117;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 0.8rem;
    line-height: 1.6;
    color: #c9d1d9;
    resize: vertical;
}

/* Grid layouts */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
}

/* Status indicator */
.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
    margin-right: 0.4rem;
}

.status-running { background: var(--success); box-shadow: 0 0 6px var(--success); }
.status-stopped { background: var(--danger); }
.status-warning { background: var(--warning); box-shadow: 0 0 6px var(--warning); }

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

.login-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 2.5rem;
    width: 100%;
    max-width: 380px;
}

.login-box h1 {
    text-align: center;
    margin-bottom: 0.5rem;
    font-size: 1.3rem;
    color: var(--accent);
}

.login-box .subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
}

.form-input {
    width: 100%;
    padding: 0.6rem 0.85rem;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.875rem;
    outline: none;
    transition: border-color 0.15s;
}

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

.btn-full {
    width: 100%;
    justify-content: center;
    padding: 0.65rem;
    margin-top: 0.5rem;
}

.error-msg {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    padding: 0.6rem;
    border-radius: 8px;
    font-size: 0.8rem;
    margin-bottom: 1rem;
    text-align: center;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 1.5rem;
}

.tab {
    padding: 0.6rem 1.2rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    text-decoration: none;
    border-bottom: 2px solid transparent;
    transition: all 0.15s;
}

.tab:hover { color: var(--text-primary); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }

/* Select */
.form-select {
    padding: 0.45rem 0.7rem;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.8rem;
    outline: none;
}

/* Toast notifications */
.toast {
    position: fixed;
    top: 1rem;
    right: 1rem;
    padding: 0.75rem 1.25rem;
    border-radius: 10px;
    font-size: 0.85rem;
    z-index: 9999;
    animation: slideIn 0.3s ease;
    max-width: 400px;
}

.toast-success { background: var(--success); color: white; }
.toast-error { background: var(--danger); color: white; }

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* Responsive */
.mobile-toggle {
    display: none;
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 200;
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.5rem;
    border-radius: 8px;
    cursor: pointer;
}

@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; padding: 1rem; padding-top: 3.5rem; }
    .mobile-toggle { display: block; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .grid-2 { grid-template-columns: 1fr; }
}

/* Disk usage chart */
.disk-chart {
    display: flex;
    height: 24px;
    border-radius: 6px;
    overflow: hidden;
    margin: 1rem 0;
}

.disk-segment {
    height: 100%;
    transition: width 0.5s;
    position: relative;
}

.disk-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 0.5rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 3px;
}

/* Live indicator */
.live-indicator {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.25rem 0.65rem;
    border-radius: 20px;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    background: rgba(100, 116, 139, 0.2);
    color: var(--text-muted);
    border: 1px solid var(--border);
    white-space: nowrap;
}

.live-indicator.active {
    background: rgba(34, 197, 94, 0.15);
    color: var(--success);
    border-color: rgba(34, 197, 94, 0.3);
}

.live-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
    animation: livePulse 1.5s ease-in-out infinite;
}

@keyframes livePulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(0.8); }
}

/* Stat card value transitions */
.stat-card .value {
    transition: color 0.3s ease;
}

.progress-bar .fill {
    transition: width 0.6s ease, background-color 0.3s ease;
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }