/* ============ VARIABLES GLOBALES ============ */
:root {
  /* Colores principales */
  --primary-color: #4e73df;
  --primary-dark: #224abe;
  --primary-light: #e6e9fc;
  --secondary-color: #1cc88a;
  --secondary-dark: #17a673;
  --danger-color: #e74a3b;
  --warning-color: #f6c23e;
  --info-color: #36b9cc;
  --light-gray: #f8f9fc;
  --gray: #dddfeb;
  --dark-gray: #5a5c69;
  --white: #ffffff;
  --black: #000000;
  
  /* Sombras */
  --shadow-sm: 0 0.15rem 1.75rem 0 rgba(58, 59, 69, 0.1);
  --shadow-md: 0 0.5rem 1.5rem rgba(58, 59, 69, 0.2);
  --shadow-lg: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
  
  /* Bordes */
  --border-radius-sm: 0.25rem;
  --border-radius-md: 0.5rem;
  --border-radius-lg: 1rem;
  
  /* Transiciones */
  --transition-fast: 0.15s;
  --transition-normal: 0.3s;
  --transition-slow: 0.5s;
}

/* ============ ESTILOS GENERALES ============ */
body {
  font-family: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 
               'Helvetica Neue', Arial, sans-serif, 'Apple Color Emoji', 
               'Segoe UI Emoji', 'Segoe UI Symbol';
  color: var(--dark-gray);
  line-height: 1.5;
  background-color: var(--light-gray);
}

a {
  text-decoration: none;
  transition: color var(--transition-fast);
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  margin-bottom: 1rem;
}

/* ============ ESTRUCTURA PRINCIPAL ============ */
.navbar-dashboard {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  box-shadow: var(--shadow-sm);
}

.sidebar {
  width: 250px;
  background: var(--white);
  box-shadow: var(--shadow-sm);
  min-height: calc(100vh - 56px);
  position: fixed;
  transition: all var(--transition-normal);
  z-index: 100;
}

.main-content {
  margin-left: 250px;
  padding: 1.5rem;
  transition: all var(--transition-normal);
}

/* ============ COMPONENTES DEL DASHBOARD ============ */
/* Tarjetas de métricas */
.dashboard-card {
  border: none;
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  height: 100%;
  background: var(--white);
  position: relative;
  overflow: hidden;
}

.dashboard-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.card-primary {
  border-left: 0.25rem solid var(--primary-color);
}

.card-success {
  border-left: 0.25rem solid var(--secondary-color);
}

.card-warning {
  border-left: 0.25rem solid var(--warning-color);
}

.card-danger {
  border-left: 0.25rem solid var(--danger-color);
}

.card-icon {
  font-size: 2rem;
  opacity: 0.3;
  position: absolute;
  right: 1.5rem;
  top: 1.5rem;
  color: inherit;
}

.card-title {
  font-size: 0.9rem;
  color: var(--dark-gray);
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.card-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--dark-gray);
}

.card-change {
  font-size: 0.8rem;
  margin-top: 0.5rem;
}

.positive-change {
  color: var(--secondary-color);
}

.negative-change {
  color: var(--danger-color);
}

/* Sección de bienvenida */
.welcome-section {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: var(--white);
  padding: 2rem;
  border-radius: var(--border-radius-md);
  margin-bottom: 2rem;
}

.welcome-section h1 {
  color: var(--white);
  margin-bottom: 0.5rem;
}

.welcome-section .lead {
  opacity: 0.8;
  margin-bottom: 0;
}

/* Gráficos */
.chart-container {
  position: relative;
  height: 300px;
  min-height: 300px;
}

/* Actividades recientes */
.recent-activities {
  list-style: none;
  padding: 0;
}

.activity-item {
  padding: 1rem 0;
  border-bottom: 1px solid var(--gray);
}

.activity-item:last-child {
  border-bottom: none;
}

.activity-time {
  font-size: 0.8rem;
  color: var(--dark-gray);
  opacity: 0.7;
}

/* Tablas */
.table-responsive {
  overflow-x: auto;
}

.table {
  width: 100%;
  margin-bottom: 1rem;
  color: var(--dark-gray);
}

.table th {
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.75rem;
  color: var(--dark-gray);
}

.table td, .table th {
  padding: 0.75rem;
  vertical-align: top;
  border-top: 1px solid var(--gray);
}

/* Componentes específicos */
.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: rgba(255,255,255,0.2);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
}

.quick-actions {
  margin-bottom: 2rem;
}

.quick-action-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1.5rem 0;
  border-radius: var(--border-radius-md);
  background: var(--white);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  text-decoration: none;
  color: var(--dark-gray);
  height: 100%;
}

.quick-action-btn:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  color: var(--primary-color);
}

.quick-action-icon {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  color: var(--primary-color);
}

/* ============ RESPONSIVIDAD ============ */
@media (max-width: 992px) {
  .sidebar {
    transform: translateX(-100%);
    position: fixed;
    top: 56px;
    left: 0;
    height: calc(100vh - 56px);
    z-index: 1000;
  }
  
  .sidebar.show {
    transform: translateX(0);
  }
  
  .main-content {
    margin-left: 0;
  }
  
  .mobile-menu-btn {
    display: inline-block !important;
  }
}

@media (max-width: 768px) {
  .welcome-section h1 {
    font-size: 1.5rem;
  }
  
  .card-value {
    font-size: 1.2rem;
  }
  
  .card-icon {
    font-size: 1.5rem;
    right: 1rem;
    top: 1rem;
  }
  
  .welcome-section .text-end {
    text-align: center !important;
    margin-top: 1rem;
  }
}

/* ============ PÁGINA DE LOGIN ============ */
body.login-page {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.login-container {
  width: 100%;
  max-width: 400px;
}

.login-form {
  background: var(--white);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-lg);
  padding: 2rem;
  text-align: center;
}

.logo {
  margin-bottom: 1.5rem;
}

.logo h1 {
  color: var(--primary-color);
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
}

.form-group {
  margin-bottom: 1.25rem;
  text-align: left;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--dark-gray);
}

.form-group input {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--gray);
  border-radius: var(--border-radius-sm);
  font-size: 1rem;
  transition: all var(--transition-fast);
}

.form-group input:focus {
  border-color: var(--primary-color);
  outline: none;
  box-shadow: 0 0 0 0.2rem rgba(78, 115, 223, 0.25);
}

.error {
  color: var(--danger-color);
  background-color: rgba(231, 74, 59, 0.1);
  padding: 0.75rem;
  border-radius: var(--border-radius-sm);
  margin-bottom: 1.25rem;
  font-size: 0.9rem;
}

.btn {
  display: inline-block;
  width: 100%;
  background: var(--primary-color);
  color: var(--white);
  padding: 0.75rem;
  border: none;
  border-radius: var(--border-radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
}

.footer {
  margin-top: 1.5rem;
  color: var(--dark-gray);
  font-size: 0.875rem;
}
/* ============ SIDEBAR RESPONSIVE ============ */
.sidebar {
    width: 250px;
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
    background: var(--white);
    box-shadow: var(--shadow-md);
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
    overflow-y: auto;
}

.sidebar.show {
    transform: translateX(0);
}

.main-content {
    margin-left: 0;
    transition: margin-left var(--transition-normal);
}

@media (min-width: 992px) {
    .sidebar {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 250px;
    }
    
    #sidebarToggle, #sidebarClose {
        display: none !important;
    }
}

/* Overlay para móviles */
.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.sidebar-overlay.show {
    opacity: 1;
    visibility: visible;
}

/* Estilos para los items del menú */
.nav-link {
    color: var(--dark-gray);
    padding: 0.75rem 1rem;
    border-radius: var(--border-radius-sm);
    margin-bottom: 0.25rem;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
}

.nav-link:hover, .nav-link.active {
    background-color: var(--primary-light);
    color: var(--primary-color);
}

.nav-link i {
    width: 1.5rem;
    text-align: center;
}

/* Navbar superior */
.navbar-dashboard {
    background: var(--white);
    box-shadow: var(--shadow-sm);
    padding: 0.75rem 1rem;
    position: fixed;
    top: 0;
    right: 0;
    left: 0;
    z-index: 1030;
}

@media (min-width: 992px) {
    .navbar-dashboard {
        left: 250px;
    }
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: var(--white);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}
/* ====== ESTILOS DE menu_principal.php (replicados) ====== */

.navbar-dashboard {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255,255,255,0.2);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

/* Ajustes adicionales responsive */
@media (max-width: 992px) {
    .sidebar {
        position: fixed;
        z-index: 1000;
        left: -250px;
        top: 56px;
        height: calc(100vh - 56px);
    }

    .sidebar.show {
        left: 0;
    }

    .main-content {
        margin-left: 0;
    }

    .mobile-menu-btn {
        display: inline-block !important;
    }
}

@media (max-width: 768px) {
    .welcome-section h1 {
        font-size: 1.5rem;
    }

    .card-value {
        font-size: 1.2rem;
    }
}