:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-card: #1c2128;
    --bg-input: #21262d;
    --border: #30363d;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --accent: #58a6ff;
    --accent-hover: #79b8ff;
    --success: #3fb950;
    --warning: #d29922;
    --danger: #f85149;
    --info: #58a6ff;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, 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;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
}

.sidebar-header {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
}

.sidebar-logo {
    width: 100%;
    max-width: 220px;
    height: auto;
    display: block;
}

.sidebar-header h1 {
    font-size: 18px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.sidebar-header .subtitle {
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 4px;
}

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

.nav-section {
    padding: 8px 20px 4px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 20px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s;
    font-size: 14px;
    border-left: 3px solid transparent;
}

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

.nav-item.active {
    color: var(--accent);
    background: rgba(88, 166, 255, 0.08);
    border-left-color: var(--accent);
}

.nav-item .icon { width: 18px; height: 18px; flex-shrink: 0; display: block; }

/* Host selector in sidebar */
.host-selector {
    padding: 12px 20px;
    border-top: 1px solid var(--border);
}

.host-selector label {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-secondary);
    display: block;
    margin-bottom: 6px;
}

.host-selector select {
    width: 100%;
    background: var(--bg-input);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 6px 10px;
    font-size: 13px;
}

/* Main content */
.main-content {
    margin-left: 260px;
    flex: 1;
    padding: 24px 32px;
    min-height: 100vh;
}

/* Page header */
.page-header {
    margin-bottom: 24px;
}

.page-header h2 {
    font-size: 22px;
    font-weight: 600;
}

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

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 16px;
    overflow: hidden;
}

.card-header {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    font-size: 14px;
}

.card-body { padding: 16px; }

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

th {
    text-align: left;
    padding: 10px 12px;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border);
}

td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
}

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

tr:hover td { background: rgba(88, 166, 255, 0.04); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg-input);
    color: var(--text-primary);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.15s;
}

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

.btn-primary {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.btn-primary:hover { background: var(--accent-hover); }

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

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

.btn-success {
    background: transparent;
    border-color: var(--success);
    color: var(--success);
}

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

.btn-warning {
    background: transparent;
    border-color: var(--warning);
    color: var(--warning);
}

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

.btn-sm { padding: 4px 10px; font-size: 12px; }

.btn-group { display: flex; gap: 6px; }

/* Badges */
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
}

.badge-online { background: rgba(63, 185, 80, 0.15); color: var(--success); }
.badge-offline { background: rgba(248, 81, 73, 0.15); color: var(--danger); }
.badge-degraded { background: rgba(210, 153, 34, 0.15); color: var(--warning); }
.badge-running { background: rgba(63, 185, 80, 0.15); color: var(--success); }
.badge-stopped { background: rgba(139, 148, 158, 0.15); color: var(--text-secondary); }
/* Semantic aliases — used by the setup pre-flight badges and action flows;
   were referenced in JS but never defined, so those badges rendered plain. */
.badge-success { background: rgba(63, 185, 80, 0.15); color: var(--success); }
.badge-danger { background: rgba(248, 81, 73, 0.15); color: var(--danger); }
.badge-warning { background: rgba(210, 153, 34, 0.15); color: var(--warning); }

/* Key display */
.key-display {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 16px;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 12px;
    word-break: break-all;
    line-height: 1.6;
    position: relative;
}

.key-display .copy-btn {
    position: absolute;
    top: 8px;
    right: 8px;
}

/* Pre/Code */
pre.output {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 14px;
    font-family: "SFMono-Regular", Consolas, monospace;
    font-size: 12px;
    overflow-x: auto;
    line-height: 1.5;
    white-space: pre-wrap;
    max-height: 500px;
    overflow-y: auto;
}

/* Forms */
.form-group {
    margin-bottom: 14px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text-secondary);
}

.form-control {
    width: 100%;
    background: var(--bg-input);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 8px 12px;
    font-size: 14px;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(88, 166, 255, 0.2);
}

.form-row {
    display: flex;
    gap: 12px;
}

.form-row .form-group { flex: 1; }

/* Grid */
.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-5 { grid-template-columns: repeat(5, 1fr); }

/* Snapshot Timeline */
.snapshot-timeline {
    position: relative;
    padding-left: 24px;
}

.snapshot-timeline::before {
    content: "";
    position: absolute;
    left: 7px;
    top: 6px;
    bottom: 6px;
    width: 2px;
    background: var(--border);
}

.tl-node {
    position: relative;
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding-bottom: 18px;
}

.tl-node:last-child { padding-bottom: 4px; }

.tl-dot {
    position: absolute;
    left: -24px;
    top: 5px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 2px solid var(--border);
    background: var(--bg-card);
    z-index: 1;
    flex-shrink: 0;
}

.tl-dot-latest {
    background: var(--accent);
    border-color: var(--accent);
    box-shadow: 0 0 8px rgba(88, 166, 255, 0.4);
}

.tl-dot-manual {
    background: var(--bg-input);
    border-color: var(--text-secondary);
}

.tl-dot-auto {
    background: var(--bg-input);
    border-color: var(--border);
}

.tl-content {
    flex: 1;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 10px 14px;
    transition: border-color 0.15s;
}

.tl-content:hover {
    border-color: var(--text-secondary);
}

.tl-node-latest > .tl-content {
    border-color: var(--accent);
    background: rgba(88, 166, 255, 0.05);
}

.tl-top-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.tl-snap-name {
    font-size: 13px;
    word-break: break-all;
}

.tl-date {
    font-size: 11px;
    color: var(--text-secondary);
    white-space: nowrap;
}

.tl-meta {
    display: flex;
    gap: 12px;
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 4px;
    align-items: center;
}

.tl-actions {
    display: flex;
    gap: 6px;
    margin-top: 8px;
    flex-wrap: wrap;
}

/* File Restore Breadcrumbs */
.restore-crumb {
    color: var(--accent);
    cursor: pointer;
    transition: color 0.15s;
}

.restore-crumb:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

/* Stat cards */
.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px;
}

.stat-card .stat-label {
    font-size: 11px;
    text-transform: uppercase;
    color: var(--text-secondary);
    font-weight: 600;
    letter-spacing: 0.5px;
}

.stat-card .stat-value {
    font-size: 24px;
    font-weight: 700;
    margin-top: 4px;
}

/* Modal */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 200;
    align-items: center;
    justify-content: center;
}

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

.modal {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    width: 700px;
    max-width: 90vw;
    max-height: 85vh;
    overflow-y: auto;
}

.modal-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
}

.modal-header .close-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 20px;
    cursor: pointer;
}

.modal-body { padding: 20px; }
.modal-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

/* Toast */
.toast-container {
    position: fixed;
    top: 16px;
    right: 16px;
    z-index: 300;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px 16px;
    min-width: 280px;
    font-size: 13px;
    animation: slideIn 0.2s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.toast.success { border-left: 3px solid var(--success); }
.toast.error { border-left: 3px solid var(--danger); }
.toast.info { border-left: 3px solid var(--info); }

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

/* Loading */
.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.loading-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    color: var(--text-secondary);
    gap: 10px;
}

/* Tabs */
.tab-bar {
    display: flex;
    border-bottom: 1px solid var(--border);
    margin-bottom: 16px;
}

.tab {
    padding: 8px 16px;
    font-size: 13px;
    color: var(--text-secondary);
    cursor: pointer;
    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); }

/* Checkbox */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    cursor: pointer;
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
}

.empty-state .icon { font-size: 32px; margin-bottom: 12px; }

/* Responsive */
@media (max-width: 768px) {
    .sidebar { width: 60px; }
    .sidebar .nav-item span,
    .sidebar-header .subtitle,
    .sidebar-header h1 span,
    .sidebar .nav-section,
    .host-selector label { display: none; }
    .sidebar-header h1 { justify-content: center; }
    .sidebar-logo { max-width: 40px; }
    .main-content { margin-left: 60px; padding: 16px; }
    .grid-2, .grid-3, .grid-4, .grid-5 { grid-template-columns: 1fr; }
    .form-row { flex-direction: column; }
}