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

:root {
  --bg-primary: #0f1117;
  --bg-secondary: #1a1d27;
  --bg-card: #222639;
  --bg-hover: #2a2f45;
  --border: #2e334a;
  --text-primary: #e4e6f0;
  --text-secondary: #9598a8;
  --text-muted: #6b6f82;
  --accent: #6366f1;
  --accent-hover: #5457e5;
  --green: #22c55e;
  --green-bg: rgba(34, 197, 94, 0.12);
  --red: #ef4444;
  --red-bg: rgba(239, 68, 68, 0.12);
  --yellow: #eab308;
  --yellow-bg: rgba(234, 179, 8, 0.12);
  --blue: #3b82f6;
  --blue-bg: rgba(59, 130, 246, 0.12);
  --purple: #a855f7;
  --purple-bg: rgba(168, 85, 247, 0.12);
  --sidebar-width: 240px;
  --header-height: 60px;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 1px 3px rgba(0,0,0,0.3);
}

html { font-size: 14px; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
}

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

.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  height: 100vh;
  position: sticky;
  top: 0;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.sidebar-header {
  padding: 20px;
  border-bottom: 1px solid var(--border);
}

.sidebar-header h1 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.sidebar-header .subtitle {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.sidebar-nav {
  padding: 12px 10px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.15s;
}

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

.nav-item.active {
  background: var(--accent);
  color: white;
}

.nav-item .icon {
  width: 20px;
  text-align: center;
  font-size: 1.1rem;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.main-content {
  flex: 1;
  padding: 24px 32px;
  max-width: 1400px;
  min-width: 0;
}

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

.page-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.page-header p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow);
}

.stat-card .label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}

.stat-card .value {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.2;
}

.stat-card .value.green { color: var(--green); }
.stat-card .value.blue { color: var(--blue); }
.stat-card .value.yellow { color: var(--yellow); }
.stat-card .value.purple { color: var(--purple); }
.stat-card .value.red { color: var(--red); }
.stat-card .value.accent { color: var(--accent); }

.chart-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 24px;
  box-shadow: var(--shadow);
}

.chart-container h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.chart-container canvas {
  max-height: 280px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.card-header h3 {
  font-size: 1rem;
  font-weight: 600;
}

.card-body {
  padding: 0;
  overflow-x: auto;
}

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

thead th {
  text-align: left;
  padding: 12px 20px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
  background: var(--bg-secondary);
}

tbody td {
  padding: 12px 20px;
  font-size: 0.88rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-primary);
  vertical-align: middle;
}

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

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

.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-green {
  background: var(--green-bg);
  color: var(--green);
}

.badge-red {
  background: var(--red-bg);
  color: var(--red);
}

.badge-yellow {
  background: var(--yellow-bg);
  color: var(--yellow);
}

.badge-blue {
  background: var(--blue-bg);
  color: var(--blue);
}

.badge-purple {
  background: var(--purple-bg);
  color: var(--purple);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: all 0.15s;
  line-height: 1;
}

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

.btn-danger {
  background: var(--red);
  color: white;
}
.btn-danger:hover { background: #dc2626; }

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

.btn-sm {
  padding: 5px 10px;
  font-size: 0.8rem;
}

.btn-xs {
  padding: 3px 8px;
  font-size: 0.75rem;
}

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

input, select, textarea {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 8px 12px;
  font-size: 0.88rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s;
  width: 100%;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--accent);
}

textarea {
  resize: vertical;
  min-height: 80px;
}

select {
  cursor: pointer;
}

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

.form-group label {
  display: block;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 90%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

.modal-header {
  padding: 18px 22px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header h3 {
  font-size: 1.05rem;
  font-weight: 600;
}

.modal-header .close-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.4rem;
  cursor: pointer;
  padding: 0 4px;
  line-height: 1;
}
.modal-header .close-btn:hover { color: var(--text-primary); }

.modal-body {
  padding: 22px;
}

.modal-footer {
  padding: 14px 22px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 500;
  z-index: 2000;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s;
  box-shadow: var(--shadow);
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

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

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

.search-input {
  max-width: 280px;
}

.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--text-muted);
}

.empty-state p {
  font-size: 0.95rem;
}

.toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.toolbar .spacer {
  flex: 1;
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.filter-group label {
  font-size: 0.82rem;
  color: var(--text-secondary);
  white-space: nowrap;
}

.filter-group select, .filter-group input {
  width: auto;
  min-width: 140px;
}

@media (max-width: 768px) {
  .sidebar { display: none; }
  .main-content { padding: 16px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .toolbar { flex-direction: column; align-items: stretch; }
  .search-input { max-width: 100%; }
}

.checkbox-wrapper {
  display: flex;
  align-items: center;
  gap: 8px;
}

.checkbox-wrapper input[type="checkbox"] {
  width: auto;
  accent-color: var(--accent);
}

.toggle {
  position: relative;
  display: inline-block;
  width: 38px;
  height: 22px;
}

.toggle input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background: var(--text-muted);
  border-radius: 22px;
  transition: 0.2s;
}

.toggle-slider::before {
  content: '';
  position: absolute;
  height: 16px;
  width: 16px;
  left: 3px;
  bottom: 3px;
  background: white;
  border-radius: 50%;
  transition: 0.2s;
}

.toggle input:checked + .toggle-slider {
  background: var(--green);
}

.toggle input:checked + .toggle-slider::before {
  transform: translateX(16px);
}

.monospace {
  font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 0.82rem;
}

.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.mt-2 { margin-top: 8px; }
.mb-2 { margin-bottom: 8px; }
.truncate {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 200px;
}