:root {
  --bg-main: #0b0f19;
  --bg-sidebar: #111827;
  --bg-card: #1f2937;
  --bg-card-hover: #283548;
  --bg-card-active: #2b394e;
  --border-color: #374151;
  --border-focus: #6366f1;
  
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;
  
  --status-up: #10b981;
  --status-up-bg: rgba(16, 185, 129, 0.15);
  --status-down: #ef4444;
  --status-down-bg: rgba(239, 68, 68, 0.15);
  --status-pending: #f59e0b;
  --status-pending-bg: rgba(245, 158, 11, 0.15);
  --status-disabled: #6b7280;
  --status-disabled-bg: rgba(107, 114, 128, 0.15);

  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --accent-glow: rgba(99, 102, 241, 0.3);
  
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-main);
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Header */
.app-header {
  height: 60px;
  background-color: var(--bg-sidebar);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  z-index: 10;
}

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

.brand-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, #6366f1, #10b981);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 18px;
  color: #fff;
  box-shadow: 0 0 15px var(--accent-glow);
}

.brand-title {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.brand-badge {
  font-size: 11px;
  background: #374151;
  color: #9ca3af;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 500;
}

.header-stats {
  display: flex;
  align-items: center;
  gap: 16px;
}

.stat-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  padding: 6px 12px;
  background: #1f2937;
  border: 1px solid var(--border-color);
  border-radius: 20px;
}

.stat-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.stat-dot.up { background-color: var(--status-up); box-shadow: 0 0 8px var(--status-up); }
.stat-dot.down { background-color: var(--status-down); box-shadow: 0 0 8px var(--status-down); }
.stat-dot.pending { background-color: var(--status-pending); }
.stat-dot.disabled { background-color: var(--status-disabled); }

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
  text-decoration: none;
}

.btn-primary {
  background-color: var(--accent);
  color: white;
}
.btn-primary:hover {
  background-color: var(--accent-hover);
  box-shadow: 0 0 12px var(--accent-glow);
}

.btn-secondary {
  background-color: #374151;
  color: var(--text-main);
  border-color: #4b5563;
}
.btn-secondary:hover {
  background-color: #4b5563;
}

.btn-danger {
  background-color: rgba(239, 68, 68, 0.2);
  color: #ef4444;
  border-color: rgba(239, 68, 68, 0.4);
}
.btn-danger:hover {
  background-color: rgba(239, 68, 68, 0.3);
}

.btn-success {
  background-color: rgba(16, 185, 129, 0.2);
  color: #10b981;
  border-color: rgba(16, 185, 129, 0.4);
}
.btn-success:hover {
  background-color: rgba(16, 185, 129, 0.3);
}

/* App Body Layout */
.app-container {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* Sidebar */
.sidebar {
  width: 320px;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.sidebar-controls {
  padding: 12px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.search-box {
  position: relative;
}

.search-input {
  width: 100%;
  padding: 8px 12px 8px 32px;
  background-color: #1f2937;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-main);
  font-size: 13px;
  outline: none;
}
.search-input:focus {
  border-color: var(--accent);
}

.search-icon {
  position: absolute;
  left: 10px;
  top: 9px;
  color: var(--text-dim);
  font-size: 14px;
}

.filter-tabs {
  display: flex;
  gap: 4px;
  background-color: #1f2937;
  padding: 3px;
  border-radius: 6px;
}

.filter-tab {
  flex: 1;
  text-align: center;
  padding: 4px 6px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s;
}
.filter-tab.active {
  background-color: #374151;
  color: #fff;
}

.monitor-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.monitor-item {
  padding: 10px 12px;
  background-color: var(--bg-card);
  border: 1px solid transparent;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s ease;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.monitor-item:hover {
  background-color: var(--bg-card-hover);
  border-color: #4b5563;
}
.monitor-item.active {
  background-color: var(--bg-card-active);
  border-color: var(--accent);
  box-shadow: 0 0 10px rgba(99, 102, 241, 0.2);
}

.monitor-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.monitor-item-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.monitor-item-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-muted);
}

.mini-beatmap {
  display: flex;
  gap: 2px;
  height: 10px;
  align-items: center;
}
.mini-beat-bar {
  flex: 1;
  height: 8px;
  border-radius: 1px;
  background: #374151;
}
.mini-beat-bar.up { background: var(--status-up); }
.mini-beat-bar.down { background: var(--status-down); }
.mini-beat-bar.pending { background: var(--status-pending); }

/* Main Content Area */
.main-content {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  background-color: var(--bg-main);
}

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

.detail-title-group {
  display: flex;
  align-items: center;
  gap: 16px;
}

.status-badge-lg {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 15px;
  text-transform: uppercase;
}
.status-badge-lg.up {
  background-color: var(--status-up-bg);
  color: var(--status-up);
  border: 1px solid rgba(16, 185, 129, 0.3);
}
.status-badge-lg.down {
  background-color: var(--status-down-bg);
  color: var(--status-down);
  border: 1px solid rgba(239, 68, 68, 0.3);
}
.status-badge-lg.pending {
  background-color: var(--status-pending-bg);
  color: var(--status-pending);
}
.status-badge-lg.disabled {
  background-color: var(--status-disabled-bg);
  color: var(--status-disabled);
}

.detail-target-url {
  font-size: 13px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  display: flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
}
.detail-target-url:hover {
  color: var(--accent);
}

/* Metric Cards */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.metric-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.metric-card-label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-dim);
  letter-spacing: 0.5px;
}

.metric-card-value {
  font-size: 26px;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--text-main);
}
.metric-card-value.highlight-up { color: var(--status-up); }
.metric-card-value.highlight-down { color: var(--status-down); }

/* Beatmap Section (Uptime Kuma style) */
.card-section {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.card-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-section-title {
  font-size: 15px;
  font-weight: 700;
}

.beatmap-container {
  display: flex;
  gap: 3px;
  align-items: flex-end;
  height: 48px;
  padding: 6px;
  background-color: #111827;
  border-radius: 8px;
  position: relative;
}

.beat-slot {
  flex: 1;
  height: 100%;
  border-radius: 3px;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.15s;
  position: relative;
}
.beat-slot:hover {
  opacity: 0.8;
  transform: scaleY(1.1);
}
.beat-slot.up { background-color: var(--status-up); }
.beat-slot.down { background-color: var(--status-down); }
.beat-slot.pending { background-color: var(--status-pending); }
.beat-slot.empty { background-color: #374151; }

.beatmap-legend {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-dim);
}

/* Charts */
.chart-container {
  height: 240px;
  width: 100%;
  position: relative;
}

/* Incident & Logs Table */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.data-table th {
  text-align: left;
  padding: 10px 12px;
  color: var(--text-dim);
  font-weight: 600;
  border-bottom: 1px solid var(--border-color);
  text-transform: uppercase;
  font-size: 11px;
}

.data-table td {
  padding: 12px;
  border-bottom: 1px solid #283548;
  color: var(--text-main);
}

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

/* Modals */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s ease;
}
.modal-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.modal-card {
  width: 540px;
  max-width: 90vw;
  background-color: var(--bg-sidebar);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  max-height: 90vh;
}

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

.modal-title {
  font-size: 16px;
  font-weight: 700;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 20px;
  cursor: pointer;
}
.modal-close:hover { color: #fff; }

.modal-body {
  padding: 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
}

.form-control {
  padding: 9px 12px;
  background-color: #1f2937;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-main);
  font-size: 14px;
  outline: none;
}
.form-control:focus {
  border-color: var(--accent);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.modal-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  background-color: #0d121f;
}

/* Tooltips */
.custom-tooltip {
  position: absolute;
  bottom: 120%;
  left: 50%;
  transform: translateX(-50%);
  background: #000;
  color: #fff;
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 11px;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s ease;
  z-index: 50;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
}
.beat-slot:hover .custom-tooltip {
  opacity: 1;
}

/* Empty State */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--text-dim);
  gap: 16px;
  text-align: center;
}

@media (max-width: 768px) {
  .app-container { flex-direction: column; }
  .sidebar { width: 100%; height: 260px; }
  body { overflow: auto; height: auto; }
}