/* ============================================
   RoadFlow Traffic Control - Custom Styles
   Basado en DESIGN.md
   ============================================ */

/* === Variables CSS (Design Tokens) === */
:root {
  /* Colors */
  --rf-primary: #1B2A4A;
  --rf-primary-light: #2C3E50;
  --rf-secondary: #4A90E2;
  --rf-secondary-light: #5BA3F5;
  --rf-success: #27AE60;
  --rf-success-light: #2ECC71;
  --rf-warning: #F39C12;
  --rf-warning-light: #F5B041;
  --rf-danger: #E74C3C;
  --rf-danger-light: #EC7063;
  --rf-neutral: #F5F7FA;
  --rf-neutral-dark: #E8ECF1;
  --rf-dark: #2C3E50;
  --rf-text-primary: #1B2A4A;
  --rf-text-secondary: #7F8C8D;
  --rf-white: #FFFFFF;
  
  /* Spacing */
  --rf-spacing-xs: 4px;
  --rf-spacing-sm: 8px;
  --rf-spacing-md: 16px;
  --rf-spacing-lg: 24px;
  --rf-spacing-xl: 32px;
  --rf-spacing-2xl: 48px;
  
  /* Rounded */
  --rf-rounded-sm: 4px;
  --rf-rounded-md: 8px;
  --rf-rounded-lg: 12px;
  --rf-rounded-xl: 16px;
  
  /* Shadows */
  --rf-shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --rf-shadow-md: 0 2px 8px rgba(0,0,0,0.08);
  --rf-shadow-lg: 0 4px 16px rgba(0,0,0,0.12);
}

/* === Base === */
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background-color: var(--rf-neutral);
  color: var(--rf-text-primary);
  font-size: 1rem;
  line-height: 1.5;
}

/* === Typography === */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  color: var(--rf-text-primary);
  margin-bottom: var(--rf-spacing-md);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }

.text-mono {
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  font-weight: 500;
}

.text-secondary {
  color: var(--rf-text-secondary) !important;
}

/* === Navbar === */
.navbar {
  background: linear-gradient(135deg, var(--rf-primary) 0%, var(--rf-primary-light) 100%);
  box-shadow: var(--rf-shadow-md);
  padding: var(--rf-spacing-md) var(--rf-spacing-lg);
}

.navbar-brand {
  color: var(--rf-white) !important;
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.nav-link {
  color: rgba(255,255,255,0.9) !important;
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav-link:hover {
  color: var(--rf-white) !important;
}

/* === Sidebar === */
.sidebar {
  background: var(--rf-white);
  border-right: 1px solid var(--rf-neutral-dark);
  min-height: calc(100vh - 72px);
  padding: var(--rf-spacing-lg) 0;
}

.sidebar .nav-link {
  color: var(--rf-text-primary);
  padding: var(--rf-spacing-md) var(--rf-spacing-lg);
  font-weight: 500;
  border-radius: var(--rf-rounded-md);
  margin: 0 var(--rf-spacing-sm);
  transition: all 0.2s ease;
}

.sidebar .nav-link:hover {
  background-color: var(--rf-neutral);
  color: var(--rf-secondary);
}

.sidebar .nav-link.active {
  background-color: var(--rf-secondary);
  color: var(--rf-white);
}

/* === KPI Cards === */
.card-kpi {
  background: var(--rf-white);
  border: 1px solid var(--rf-neutral-dark);
  border-radius: var(--rf-rounded-lg);
  box-shadow: var(--rf-shadow-md);
  padding: var(--rf-spacing-lg);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.card-kpi:hover {
  transform: translateY(-4px);
  box-shadow: var(--rf-shadow-lg);
}

.card-kpi::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--rf-secondary);
}

.card-kpi.success::before { background: var(--rf-success); }
.card-kpi.warning::before { background: var(--rf-warning); }
.card-kpi.danger::before { background: var(--rf-danger); }

.card-kpi .kpi-icon {
  font-size: 2.5rem;
  margin-bottom: var(--rf-spacing-sm);
  opacity: 0.8;
}

.card-kpi .kpi-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--rf-text-primary);
  line-height: 1;
  margin: var(--rf-spacing-sm) 0;
}

.card-kpi .kpi-label {
  font-size: 0.875rem;
  color: var(--rf-text-secondary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.card-kpi .kpi-trend {
  display: inline-flex;
  align-items: center;
  gap: var(--rf-spacing-xs);
  font-size: 0.875rem;
  font-weight: 600;
  margin-top: var(--rf-spacing-sm);
  padding: var(--rf-spacing-xs) var(--rf-spacing-sm);
  border-radius: var(--rf-rounded-sm);
}

.card-kpi .kpi-trend.up {
  background: rgba(39, 174, 96, 0.1);
  color: var(--rf-success);
}

.card-kpi .kpi-trend.down {
  background: rgba(231, 76, 60, 0.1);
  color: var(--rf-danger);
}

/* === Chart Containers === */
.card-chart {
  background: var(--rf-white);
  border: 1px solid var(--rf-neutral-dark);
  border-radius: var(--rf-rounded-lg);
  box-shadow: var(--rf-shadow-md);
  padding: var(--rf-spacing-lg);
  margin-bottom: var(--rf-spacing-lg);
}

.card-chart .chart-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--rf-text-primary);
  margin-bottom: var(--rf-spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--rf-spacing-sm);
}

.card-chart .chart-title::before {
  content: '';
  width: 4px;
  height: 20px;
  background: var(--rf-secondary);
  border-radius: 2px;
}

/* === Badges === */
.badge-status {
  display: inline-flex;
  align-items: center;
  gap: var(--rf-spacing-xs);
  padding: var(--rf-spacing-xs) var(--rf-spacing-sm);
  border-radius: var(--rf-rounded-sm);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-success {
  background: var(--rf-success);
  color: var(--rf-white);
}

.badge-warning {
  background: var(--rf-warning);
  color: var(--rf-white);
}

.badge-danger {
  background: var(--rf-danger);
  color: var(--rf-white);
}

/* === Tables === */
.table {
  background: var(--rf-white);
  border-radius: var(--rf-rounded-lg);
  overflow: hidden;
}

.table thead {
  background: var(--rf-neutral);
}

.table thead th {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--rf-text-secondary);
  border: none;
  padding: var(--rf-spacing-md);
}

.table tbody td {
  padding: var(--rf-spacing-md);
  vertical-align: middle;
  border-color: var(--rf-neutral-dark);
}

.table tbody tr:hover {
  background: var(--rf-neutral);
}

/* === Timeline/Events === */
.timeline {
  position: relative;
  padding-left: var(--rf-spacing-xl);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 12px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--rf-neutral-dark);
}

.timeline-item {
  position: relative;
  padding-bottom: var(--rf-spacing-lg);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -28px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--rf-secondary);
  border: 2px solid var(--rf-white);
  box-shadow: 0 0 0 2px var(--rf-neutral-dark);
}

.timeline-item.success::before { background: var(--rf-success); }
.timeline-item.warning::before { background: var(--rf-warning); }
.timeline-item.danger::before { background: var(--rf-danger); }

.timeline-item .timeline-time {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--rf-text-secondary);
  margin-bottom: var(--rf-spacing-xs);
}

.timeline-item .timeline-message {
  font-size: 0.875rem;
  color: var(--rf-text-primary);
  font-weight: 500;
}

/* === Content Area === */
.content {
  padding: var(--rf-spacing-xl);
  background: var(--rf-neutral);
  min-height: calc(100vh - 72px);
}

/* === Buttons === */
.btn-primary {
  background: var(--rf-secondary);
  border: none;
  border-radius: var(--rf-rounded-md);
  padding: 10px 20px;
  font-weight: 600;
  transition: all 0.2s ease;
}

.btn-primary:hover {
  background: var(--rf-secondary-light);
  transform: translateY(-1px);
  box-shadow: var(--rf-shadow-md);
}

/* === Alerts === */
.alert {
  border: none;
  border-radius: var(--rf-rounded-md);
  padding: var(--rf-spacing-md);
  font-weight: 500;
}

.alert-success {
  background: rgba(39, 174, 96, 0.1);
  color: var(--rf-success);
}

.alert-warning {
  background: rgba(243, 156, 18, 0.1);
  color: var(--rf-warning);
}

.alert-danger {
  background: rgba(231, 76, 60, 0.1);
  color: var(--rf-danger);
}

/* === Responsive === */
@media (max-width: 768px) {
  .sidebar {
    min-height: auto;
    border-right: none;
    border-bottom: 1px solid var(--rf-neutral-dark);
  }
  
  .content {
    padding: var(--rf-spacing-md);
  }
  
  .card-kpi .kpi-value {
    font-size: 2rem;
  }
}

/* === Animations === */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.card-kpi, .card-chart {
  animation: fadeIn 0.4s ease-out;
}

/* === Scrollbar === */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--rf-neutral);
}

::-webkit-scrollbar-thumb {
  background: var(--rf-neutral-dark);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--rf-text-secondary);
}