:root {
  --ui-bg: #f3f4f6;
  --ui-bg-alt: #f5f6f8;
  --ui-card: #ffffff;
  --ui-border: #e5e7eb;
  --ui-text: #111827;
  --ui-muted: #6b7280;
  --ui-primary: #2563eb;
  --ui-primary-hover: #1d4ed8;
  --ui-success: #16a34a;
  --ui-success-bg: #dcfce7;
  --ui-warning: #b45309;
  --ui-warning-bg: #fef3c7;
  --ui-danger: #b91c1c;
  --ui-danger-bg: #fee2e2;
  --ui-info: #1d4ed8;
  --ui-info-bg: #dbeafe;
}

.ui-card {
  background: var(--ui-card);
  border: 1px solid var(--ui-border);
  border-radius: 10px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
  padding: 1rem;
}

.ui-panel {
  background: var(--ui-card);
  border: 1px solid var(--ui-border);
  border-radius: 10px;
  padding: 1rem;
}

.ui-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.ui-text-muted {
  color: var(--ui-muted);
}

.ui-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: #374151;
}

.ui-input,
.ui-select,
.ui-textarea {
  border: 1px solid #d1d5db;
  border-radius: 6px;
  padding: 0.5rem;
  font-size: 0.875rem;
  background: #ffffff;
  color: var(--ui-text);
}

.ui-input:focus,
.ui-select:focus,
.ui-textarea:focus {
  outline: none;
  border-color: var(--ui-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.ui-input-sm,
.ui-select-sm {
  padding: 0.375rem 0.5rem;
  font-size: 0.8125rem;
}

.ui-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.375rem;
  border-radius: 6px;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 600;
  border: 1px solid transparent;
  transition: background-color 150ms ease, color 150ms ease, border-color 150ms ease;
  line-height: 1.2;
}

.ui-btn-sm {
  padding: 0.375rem 0.625rem;
  font-size: 0.8125rem;
}

.ui-btn-primary {
  background: var(--ui-primary);
  color: #ffffff;
}

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

.ui-btn-secondary {
  background: #e5e7eb;
  color: #111827;
}

.ui-btn-secondary:hover {
  background: #d1d5db;
}

.ui-btn-muted {
  background: #6b7280;
  color: #ffffff;
}

.ui-btn-muted:hover {
  background: #4b5563;
}

.ui-btn-success {
  background: #16a34a;
  color: #ffffff;
}

.ui-btn-success:hover {
  background: #15803d;
}

.ui-btn-danger {
  background: #dc2626;
  color: #ffffff;
}

.ui-btn-danger:hover {
  background: #b91c1c;
}

.ui-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.6875rem;
  font-weight: 600;
  padding: 0.25rem 0.5rem;
  border-radius: 9999px;
  background: #e5e7eb;
  color: #374151;
}

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

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

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

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

.ui-alert {
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
}

.ui-alert-success {
  background: #ecfdf3;
  border-color: #bbf7d0;
  color: #166534;
}

.ui-alert-info {
  background: #eff6ff;
  border-color: #bfdbfe;
  color: #1e40af;
}

.ui-alert-warning {
  background: #fff7ed;
  border-color: #fed7aa;
  color: #9a3412;
}

.ui-alert-danger {
  background: #fef2f2;
  border-color: #fecaca;
  color: #991b1b;
}

.ui-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  background: #ffffff;
  border: 1px solid var(--ui-border);
}

.ui-table thead th {
  text-align: left;
  font-weight: 600;
  background: #f9fafb;
  border-bottom: 1px solid var(--ui-border);
  padding: 0.5rem 0.75rem;
}

.ui-table td {
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--ui-border);
}

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

.ui-table tbody tr:hover {
  background: #f3f4f6;
}

.ui-icon-invert {
  filter: invert(1);
}