:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #111827;
  --bg-card: #1a2234;
  --bg-card-hover: #1f2b42;
  --border: #2a3550;
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --critical: #dc2626;
  --info: #06b6d4;
  --cpu-color: #3b82f6;
  --mem-color: #8b5cf6;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
}

* { 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;
  overflow-x: hidden;
}

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

/* ── Navigation ────────────────────────────────────── */
.navbar {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  padding: 0 2rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
}

.nav-brand .logo {
  font-size: 1.6rem;
  line-height: 1;
}

.nav-brand .title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.nav-brand .subtitle {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: -2px;
}

.nav-stats {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.nav-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.nav-stat .value {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.nav-stat .label {
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.nav-alert-badge {
  background: var(--danger);
  color: white;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 99px;
  cursor: pointer;
  transition: transform 0.15s;
}
.nav-alert-badge:hover { transform: scale(1.1); }

/* ── Main Content ──────────────────────────────────── */
.main { padding: 1.5rem 2rem; max-width: 1600px; margin: 0 auto; }

/* ── Toolbar ────────────────────────────────────────── */
.toolbar {
  display: flex;
  gap: 12px;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  align-items: center;
}

.search-box {
  flex: 1;
  min-width: 200px;
  position: relative;
}

.search-box input {
  width: 100%;
  padding: 10px 14px 10px 38px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s;
}

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

.search-box .icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.9rem;
}

.filter-btn {
  padding: 10px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.filter-btn:hover { border-color: var(--accent); color: var(--text-primary); }
.filter-btn.active { background: var(--accent); border-color: var(--accent); color: white; }

.sort-select {
  padding: 10px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.85rem;
  cursor: pointer;
  outline: none;
}

.sort-select option { background: var(--bg-secondary); }

/* ── Container Grid ────────────────────────────────── */
.container-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px;
}

/* ── Container Card ─────────────────────────────────── */
.container-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  cursor: pointer;
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
}

.container-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--success);
  transition: background 0.3s;
}

.container-card.warning::before { background: var(--warning); }
.container-card.critical::before { background: var(--danger); }
.container-card.stopped::before { background: var(--text-muted); }

.container-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1rem;
}

.card-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  word-break: break-all;
}

.card-stack {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.card-state {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 3px 8px;
  border-radius: 99px;
  white-space: nowrap;
}

.card-state.running { background: rgba(16,185,129,0.15); color: var(--success); }
.card-state.exited, .card-state.dead { background: rgba(239,68,68,0.15); color: var(--danger); }
.card-state.paused { background: rgba(245,158,11,0.15); color: var(--warning); }
.card-state.created { background: rgba(100,116,139,0.15); color: var(--text-muted); }

.card-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.metric-box {
  background: rgba(0,0,0,0.2);
  border-radius: var(--radius-sm);
  padding: 10px;
}

.metric-label {
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.metric-value {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
}

.metric-value.cpu { color: var(--cpu-color); }
.metric-value.memory { color: var(--mem-color); }

.metric-bar {
  height: 4px;
  background: rgba(255,255,255,0.06);
  border-radius: 2px;
  margin-top: 8px;
  overflow: hidden;
}

.metric-bar-fill {
  height: 100%;
  border-radius: 2px;
  transition: width 0.5s ease, background 0.3s;
}

.metric-bar-fill.cpu { background: var(--cpu-color); }
.metric-bar-fill.memory { background: var(--mem-color); }
.metric-bar-fill.warn { background: var(--warning); }
.metric-bar-fill.danger { background: var(--danger); }

.metric-detail {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.card-alert-indicator {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--danger);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ── Detail Page ────────────────────────────────────── */
.detail-page { max-width: 1200px; margin: 0 auto; }

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.85rem;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
  margin-bottom: 1.5rem;
}

.back-btn:hover { border-color: var(--accent); color: var(--text-primary); }

.detail-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.detail-title {
  font-size: 1.75rem;
  font-weight: 700;
}

.detail-meta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
}

.detail-meta .tag {
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: 99px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
}

.detail-actions {
  display: flex;
  gap: 8px;
}

.btn {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-secondary);
}

.btn:hover { border-color: var(--accent); color: var(--text-primary); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: white; }
.btn-primary:hover { background: var(--accent-hover); }

/* Stats row */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
}

.stat-card .stat-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}

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

.stat-card .stat-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* Chart area */
.chart-section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.chart-section h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.chart-container {
  position: relative;
  height: 300px;
}

.time-range-btns {
  display: flex;
  gap: 4px;
  margin-bottom: 1rem;
}

.time-range-btns .btn {
  font-size: 0.75rem;
  padding: 4px 12px;
}

.time-range-btns .btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

/* ── Quota / Alert Settings ─────────────────────────── */
.settings-section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.settings-section h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.settings-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.setting-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.setting-group label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.setting-group input {
  padding: 8px 12px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.9rem;
  outline: none;
}

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

.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0;
}

.toggle-row label {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.toggle {
  position: relative;
  width: 44px;
  height: 24px;
  background: var(--border);
  border-radius: 12px;
  cursor: pointer;
  transition: background 0.2s;
}

.toggle.active { background: var(--accent); }

.toggle::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  background: white;
  border-radius: 50%;
  transition: transform 0.2s;
}

.toggle.active::after { transform: translateX(20px); }

/* ── Alerts List ────────────────────────────────────── */
.alerts-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.alert-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: var(--bg-primary);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
}

.alert-item .alert-icon {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.alert-item .alert-icon.critical { background: var(--danger); }
.alert-item .alert-icon.warning { background: var(--warning); }

.alert-item .alert-time {
  color: var(--text-muted);
  font-size: 0.75rem;
  margin-left: auto;
  white-space: nowrap;
}

/* ── Empty State ────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--text-muted);
}

.empty-state .icon { font-size: 3rem; margin-bottom: 1rem; }
.empty-state h3 { font-size: 1.2rem; color: var(--text-secondary); margin-bottom: 0.5rem; }

/* ── Responsive ─────────────────────────────────────── */
@media (max-width: 768px) {
  .navbar { padding: 0 1rem; }
  .main { padding: 1rem; }
  .container-grid { grid-template-columns: 1fr; }
  .settings-grid { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: 1fr 1fr; }
  .nav-stats { display: none; }
}

/* ── Loading ────────────────────────────────────────── */
.loading {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 200px;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ── Live indicator ─────────────────────────────────── */
.live-dot {
  width: 8px;
  height: 8px;
  background: var(--success);
  border-radius: 50%;
  display: inline-block;
  animation: pulse 2s infinite;
}

/* ── Notification bell area ─────────────────────────── */
.alert-panel {
  position: fixed;
  top: 64px;
  right: 0;
  width: 400px;
  max-height: calc(100vh - 64px);
  background: var(--bg-secondary);
  border-left: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  overflow-y: auto;
  z-index: 200;
  display: none;
  box-shadow: -4px 0 20px rgba(0,0,0,0.3);
}

.alert-panel.open { display: block; }

.alert-panel-header {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.alert-panel-header h3 { font-size: 0.95rem; }