/* Variables Globales */
:root {
    /* Colores Principales */
    --primary-color: #003366;
    --secondary-color: #0056b3;
    --accent-color: #0099cc;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    
    /* Colores de Texto */
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-muted: #999999;
    
    /* Espaciado */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Bordes */
    --border-radius-sm: 0.25rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 1rem;
    
    /* Sombras */
    --box-shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --box-shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --box-shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
}

/* Reset y Estilos Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: #f5f5f5;
}

/* Layout Común */
.main-container {
    padding: var(--spacing-md);
    margin-top: 60px; /* Espacio para el navbar fijo */
}

/* Navbar Personalizado */
.navbar-custom {
    background-color: var(--primary-color);
    box-shadow: var(--box-shadow-sm);
}

.navbar-custom .navbar-brand {
    color: white;
    font-weight: 500;
}

.navbar-custom .nav-link {
    color: rgba(255,255,255,0.9);
    padding: 1rem var(--spacing-md);
    transition: all 0.3s ease;
}

.navbar-custom .nav-link:hover {
    color: white;
    background: rgba(255,255,255,0.1);
}

/* Cards Personalizados */
.custom-card {
    background: white;
    border-radius: var(--border-radius-md);
    box-shadow: var(--box-shadow-md);
    margin-bottom: var(--spacing-lg);
    border: none;
    transition: transform 0.3s ease;
}

.custom-card:hover {
    transform: translateY(-5px);
}

.custom-card .card-header {
    background: var(--primary-color);
    color: white;
    border-radius: var(--border-radius-md) var(--border-radius-md) 0 0;
    padding: var(--spacing-md) var(--spacing-lg);
}

/* Formularios Personalizados */
.form-custom .form-control {
    border-radius: var(--border-radius-sm);
    padding: 0.8rem 1rem;
    border: 2px solid #eee;
    transition: all 0.3s ease;
}

.form-custom .form-control:focus {
    border-color: var(--accent-color);
    box-shadow: none;
}

.form-custom label {
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

/* Botones Personalizados */
.btn-custom {
    padding: 0.8rem 1.5rem;
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.btn-custom-primary:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
}

/* Tablas Personalizadas */
.table-custom {
    background: white;
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: var(--box-shadow-md);
}

.table-custom thead {
    background-color: var(--primary-color);
    color: white;
}

.table-custom th {
    font-weight: 500;
    padding: var(--spacing-md);
    border: none;
}

.table-custom td {
    padding: var(--spacing-md);
    vertical-align: middle;
}

/* Badges Personalizados */
.badge-custom {
    padding: 0.5em 1em;
    border-radius: var(--border-radius-sm);
    font-weight: 500;
}

/* Alertas Personalizadas */
.alert-custom {
    border-radius: var(--border-radius-md);
    border: none;
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--box-shadow-sm);
}

/* Sidebar */
.sidebar {
    background: white;
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    box-shadow: var(--box-shadow-md);
}

.sidebar .nav-link {
    color: var(--text-primary);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-sm);
    transition: all 0.3s ease;
}

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

/* Utilidades */
.hover-shadow:hover {
    box-shadow: var(--box-shadow-lg);
}

.text-truncate-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Animaciones */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Responsive */
@media (max-width: 768px) {
    .main-container {
        padding: var(--spacing-sm);
    }
    
    .custom-card {
        margin-bottom: var(--spacing-md);
    }
    
    .table-custom {
        display: block;
        overflow-x: auto;
    }
}