/* ========================================
   DASHBOARD - FASE 5
   KPIs + Gráficos + Rankings + Alertas
   ======================================== */

.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.dashboard-header h1 {
  font-size: var(--font-size-2xl);
  color: var(--gray-900);
}

.dashboard-header p {
  color: var(--gray-500);
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-xs);
}

/* Selector de período */
.dash-period-selector select {
  padding: 0.5rem 1rem;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  color: var(--gray-700);
  background: white;
  cursor: pointer;
}

.dash-period-selector select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Tarjetas de estadísticas */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.stat-card {
  background: white;
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  padding: var(--spacing-lg);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
}

.stat-info h3 {
  font-size: var(--font-size-sm);
  color: var(--gray-500);
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
}

.stat-value {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--gray-900);
}

.stat-sub {
  font-size: var(--font-size-xs);
  color: var(--gray-400);
  margin-top: 0.25rem;
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.stat-icon svg {
  width: 24px;
  height: 24px;
}

.stat-icon.blue {
  background-color: var(--primary-light);
  color: var(--primary);
}

.stat-icon.green {
  background-color: var(--success-light);
  color: var(--success);
}

.stat-icon.yellow {
  background-color: var(--warning-light);
  color: var(--warning);
}

.stat-icon.red {
  background-color: var(--danger-light);
  color: var(--danger);
}

/* ========================================
   GRÁFICOS
   ======================================== */

.dash-charts-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.dash-charts-row.single {
  grid-template-columns: 1fr;
}

.dash-chart-card {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.dash-chart-card.wide {
  grid-column: span 1;
}

.dash-chart-card.full {
  grid-column: 1 / -1;
}

.dash-chart-header {
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--gray-100);
}

.dash-chart-header h3 {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--gray-800);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.dash-chart-body {
  padding: var(--spacing-lg);
  min-height: 280px;
  position: relative;
}

.dash-chart-body.no-padding {
  padding: 0;
  min-height: auto;
}

.dash-chart-body canvas {
  max-height: 300px;
}

/* ========================================
   TABLAS DE RANKING
   ======================================== */

.dash-ranking-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}

.dash-ranking-table thead th {
  padding: 0.6rem var(--spacing-md);
  text-align: left;
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  border-bottom: 1px solid var(--gray-200);
  background: var(--gray-50);
}

.dash-ranking-table tbody td {
  padding: 0.6rem var(--spacing-md);
  border-bottom: 1px solid var(--gray-100);
  color: var(--gray-700);
}

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

.dash-ranking-table tbody tr:hover {
  background: var(--gray-50);
}

.rank-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 700;
  background: var(--gray-100);
  color: var(--gray-600);
}

.dash-ranking-table tbody tr:nth-child(1) .rank-badge {
  background: #fef3c7;
  color: #b45309;
}

.dash-ranking-table tbody tr:nth-child(2) .rank-badge {
  background: var(--gray-200);
  color: var(--gray-700);
}

.dash-ranking-table tbody tr:nth-child(3) .rank-badge {
  background: #fed7aa;
  color: #c2410c;
}

/* ========================================
   ALERTAS
   ======================================== */

.dash-alertas {
  max-height: 320px;
  overflow-y: auto;
}

.dash-alerta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.7rem var(--spacing-lg);
  border-bottom: 1px solid var(--gray-100);
  font-size: var(--font-size-sm);
  color: var(--gray-700);
}

.dash-alerta:last-child {
  border-bottom: none;
}

.dash-alerta.warning {
  border-left: 3px solid var(--warning);
}

.dash-alerta.danger {
  border-left: 3px solid var(--danger);
}

.dash-alerta-icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  color: inherit;
}

.dash-alerta.warning .dash-alerta-icon {
  color: var(--warning);
}

.dash-alerta.danger .dash-alerta-icon {
  color: var(--danger);
}

.dash-alerta-empty {
  padding: var(--spacing-lg);
  text-align: center;
  color: var(--gray-400);
  font-size: var(--font-size-sm);
}

/* Helpers */
.text-center { text-align: center; }
.text-muted { color: var(--gray-400); }

/* ========================================
   RESPONSIVE
   ======================================== */

@media (max-width: 768px) {
  .dashboard-header {
    flex-direction: column;
    align-items: stretch;
  }

  .dash-period-selector {
    align-self: flex-start;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
  }

  .stat-card {
    padding: var(--spacing-md);
  }

  .stat-value {
    font-size: var(--font-size-xl);
  }

  .stat-icon {
    width: 40px;
    height: 40px;
  }

  .stat-icon svg {
    width: 20px;
    height: 20px;
  }

  .dash-charts-row {
    grid-template-columns: 1fr;
  }

  .dash-chart-card.wide {
    grid-column: span 1;
  }

  .dash-chart-body {
    min-height: 220px;
    padding: var(--spacing-md);
  }

  .dash-chart-body canvas {
    max-height: 250px;
  }

  .dash-ranking-table thead th,
  .dash-ranking-table tbody td {
    padding: 0.5rem;
  }

  .dash-alerta {
    padding: 0.5rem var(--spacing-md);
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .stat-card {
    flex-direction: row-reverse;
  }
}