/* =========================================
   1. VARIABLES Y BASE
   ========================================= */
:root {
    --primary-color: #0d47a1;     /* Azul Institucional Fuerte */
    --secondary-color: #546e7a;   /* Gris Azulado */
    --success-color: #2e7d32;     /* Verde Éxito */
    --danger-color: #c62828;      /* Rojo Error */
    --warning-color: #f9a825;     /* Amarillo/Naranja Alerta */
    --info-color: #0288d1;        /* Azul Info */
    --light-bg: #f4f6f9;          /* Fondo General */
    --card-bg: #ffffff;           /* Fondo Tarjetas */
    --header-bg: #1a237e;         /* Fondo Header/Nav */
    --text-color: #333333;
    --border-color: #e0e0e0;
    --shadow: 0 2px 8px rgba(0,0,0,0.08);
    --radius: 8px;
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--light-bg);
    color: var(--text-color);
    font-size: 15px;
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

h1, h2, h3 { margin-top: 0; color: #1c2331; }
a { text-decoration: none; color: var(--primary-color); }

/* =========================================
   2. HEADER Y NAVEGACIÓN (RESPONSIVE)
   ========================================= */
.main-header {
    background-color: var(--header-bg);
    color: white;
    padding: 0 20px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.dashboard-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: auto;
}

.nav-header h2 {
    margin: 0;
    font-size: 1.2rem;
    color: white;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.nav-menu {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 5px;
}

.nav-link {
    color: rgba(255,255,255,0.85);
    padding: 8px 12px;
    border-radius: 4px;
    transition: all 0.3s;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-link:hover, .nav-link.active {
    background-color: rgba(255,255,255,0.15);
    color: white;
}

.nav-toggle {
    display: none; /* Oculto en escritorio */
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 5px;
}

/* --- MODO MÓVIL (Menú Hamburguesa) --- */
@media (max-width: 992px) {
    .nav-header {
        width: 100%;
    }
    
    .nav-toggle {
        display: block; /* Mostrar botón */
    }

    .nav-menu {
        display: none; /* Ocultar menú por defecto */
        flex-direction: column;
        position: absolute;
        top: 60px;
        left: 0;
        width: 100%;
        background-color: var(--header-bg);
        padding: 10px 0;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        border-top: 1px solid rgba(255,255,255,0.1);
    }

    .nav-menu-visible {
        display: flex; /* Mostrar cuando se activa JS */
    }

    .nav-item {
        width: 100%;
    }

    .nav-link {
        padding: 12px 20px;
        border-radius: 0;
    }
    
    .nav-link:hover {
        background-color: rgba(255,255,255,0.1);
    }
}

/* =========================================
   3. CONTENIDO PRINCIPAL Y GRID
   ========================================= */
.main-content {
    padding: 20px;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    flex: 1;
}

.page-title {
    font-size: 1.8rem;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 10px;
    display: inline-block;
}

/* --- DASHBOARD GRID --- */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.dashboard-card {
    background: var(--card-bg);
    padding: 25px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform 0.2s;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

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

.card-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 15px;
    background: #e3f2fd;
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.count {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--success-color);
    margin: 10px 0;
}

/* =========================================
   4. FORMULARIOS Y TARJETAS
   ========================================= */
.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 20px;
    overflow: hidden;
}

.card-header {
    background: #f8f9fa;
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap; /* Para que botón nuevo baje en móvil */
    gap: 10px;
}

.card-header h2 {
    font-size: 1.25rem;
    margin: 0;
}

.card-body {
    padding: 20px;
}

.form-group {
    margin-bottom: 15px;
}

.form-control {
    width: 100%;
    padding: 10px;
    border: 1px solid #ced4da;
    border-radius: 4px;
    font-size: 1rem;
}

.form-control:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(13, 71, 161, 0.1);
}

/* --- FILAS DE FORMULARIO (Responsive) --- */
.form-row {
    display: flex;
    gap: 20px;
    margin-bottom: 15px;
}

@media (max-width: 768px) {
    .form-row {
        flex-direction: column; /* Apilar en móvil */
        gap: 0;
    }
}

/* =========================================
   5. BOTONES
   ========================================= */
.btn {
    display: inline-block;
    padding: 8px 16px;
    font-size: 0.95rem;
    font-weight: 600;
    text-align: center;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.btn-sm { padding: 5px 10px; font-size: 0.85rem; }

.btn-primary { background-color: var(--primary-color); color: white; }
.btn-primary:hover { background-color: #083275; }

.btn-secondary { background-color: var(--secondary-color); color: white; }
.btn-secondary:hover { background-color: #37474f; }

.btn-success { background-color: var(--success-color); color: white; }
.btn-success:hover { background-color: #1b5e20; }

.btn-danger, .btn-delete { background-color: var(--danger-color); color: white; }
.btn-danger:hover, .btn-delete:hover { background-color: #8e0000; }

.btn-edit { background-color: var(--warning-color); color: #333; }
.btn-edit:hover { background-color: #f57f17; }

.btn-info { background-color: var(--info-color); color: white; }
.btn-info:hover { background-color: #01579b; }

.form-actions {
    margin-top: 20px;
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

/* =========================================
   6. TABLAS Y DATATABLES
   ========================================= */
/* Wrapper para tablas normales (no DataTables) */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px; /* Forzar ancho mínimo para activar scroll */
}

.data-table th, .data-table td {
    padding: 12px 15px;
    border-bottom: 1px solid var(--border-color);
    text-align: left;
}

.data-table th {
    background-color: #f1f3f5;
    font-weight: 600;
    color: #495057;
}

/* Ajustes específicos para DataTables Responsive */
table.dataTable.dtr-inline.collapsed > tbody > tr > td.dtr-control:before {
    background-color: var(--primary-color);
}

/* =========================================
   7. BARRA FLOTANTE (Imprimir)
   ========================================= */
.print-bar {
    position: fixed;
    bottom: 20px;
    right: 20px;
    left: 20px; /* En móvil ocupa el ancho menos márgenes */
    max-width: 400px; /* En escritorio no es gigante */
    margin: 0 auto 0 auto; /* Centrado si left/right lo permiten */
    
    background: white;
    padding: 15px;
    border-radius: 50px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.3);
    border: 2px solid var(--primary-color);
    
    display: none; /* JS lo muestra */
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    z-index: 2000;
    
    animation: slideUp 0.3s ease-out;
}

@media (min-width: 768px) {
    .print-bar {
        left: auto; /* En escritorio se pega a la derecha */
        margin: 0;
    }
}

@keyframes slideUp {
    from { transform: translateY(100px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* =========================================
   8. LOGIN PAGE
   ========================================= */
.login-container {
    background: var(--card-bg);
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 400px;
    margin: auto; /* Centrar vertical/horizontalmente si body es flex */
    text-align: center;
}

.login-container .logo img {
    max-height: 80px;
    margin-bottom: 20px;
}

/* =========================================
   9. MENSAJES DE ALERTA
   ========================================= */
.message, .error {
    padding: 15px;
    border-radius: 4px;
    margin-bottom: 20px;
}
.message { background-color: #d4edda; color: #155724; border: 1px solid #c3e6cb; }
.error { background-color: #f8d7da; color: #721c24; border: 1px solid #f5c6cb; }