:root {
    --color-primario: #007BFF;
    --color-secundario: #0056b3;
    --color-texto: #2c3e50;
    --sombra-suave: 0 4px 6px rgba(0, 0, 0, 0.1);
    --fondo-principal: #ffffff;
    --fondo-secundario: #f8f9fa;
    --color-borde: #dee2e6;
    --color-texto-secundario: #6c757d;
    --texto-muted: #6c757d;
    --texto-display: #2c3e50;
    --texto-lead: #6c757d;
    --card-bg: #ffffff;
    --card-shadow: 0 .125rem .25rem rgba(0,0,0,.075);
    --btn-outline: #007BFF;
}

/* Modo oscuro */
[data-theme="dark"] {
    --color-primario: #0d6efd;
    --color-secundario: #0a58ca;
    --color-texto: #e9ecef;
    --sombra-suave: 0 4px 6px rgba(0, 0, 0, 0.3);
    --fondo-principal: #212529;
    --fondo-secundario: #343a40;
    --color-borde: #495057;
    --color-texto-secundario: #adb5bd;
    --texto-muted: #adb5bd;
    --texto-display: #e9ecef;
    --texto-lead: #adb5bd;
    --card-bg: #2d2d2d;
    --card-shadow: 0 .125rem .25rem rgba(0,0,0,.3);
    --btn-outline: #0d6efd;
    background-color: var(--fondo-principal);
    color: var(--color-texto);
}

[data-theme="dark"] .navbar {
    background: var(--fondo-secundario);
}

[data-theme="dark"] .dropdown-menu {
    background: var(--fondo-secundario);
    border-color: var(--color-borde);
}

[data-theme="dark"] .dropdown-item {
    color: var(--color-texto);
}

[data-theme="dark"] .dropdown-item:hover {
    background: var(--color-primario);
    color: white;
}

[data-theme="dark"] .card {
    background: var(--fondo-secundario);
    border-color: var(--color-borde);
}

[data-theme="dark"] .table {
    color: var(--color-texto);
    background-color: var(--fondo-secundario);
}

[data-theme="dark"] .table thead th {
    background: var(--fondo-secundario);
    border-color: var(--color-borde);
    color: var(--color-texto);
}

[data-theme="dark"] .table td {
    border-color: var(--color-borde);
    background-color: var(--fondo-secundario);
    color: var(--color-texto);
}

[data-theme="dark"] .table tbody tr:hover {
    background-color: var(--fondo-principal);
}

[data-theme="dark"] .table-striped tbody tr:nth-of-type(odd) {
    background-color: var(--fondo-principal);
}

[data-theme="dark"] .table-striped tbody tr:nth-of-type(even) {
    background-color: var(--fondo-secundario);
}

[data-theme="dark"] .table a {
    color: var(--color-texto);
}

[data-theme="dark"] .table a:hover {
    color: var(--color-primario);
}

[data-theme="dark"] .form-control {
    background: var(--fondo-secundario);
    border-color: var(--color-borde);
    color: var(--color-texto);
}

[data-theme="dark"] .form-control:focus {
    background: var(--fondo-secundario);
    border-color: var(--color-primario);
    color: var(--color-texto);
}

[data-theme="dark"] .btn-light {
    background: var(--fondo-secundario);
    border-color: var(--color-borde);
    color: var(--color-texto);
}

[data-theme="dark"] .btn-light:hover {
    background: var(--color-primario);
    border-color: var(--color-primario);
    color: white;
}

/* ========== NAVBAR ========== */
.navbar {
    background: #007BFF;
    padding: 0.75rem 1rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.navbar-brand {
    font-weight: 600;
    transition: opacity 0.3s;
}

.navbar-brand:hover { opacity: 0.9; }

.nav-link {
    padding: 0.5rem 1rem !important;
    transition: all 0.3s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: white;
    transition: all 0.3s;
}

.nav-link:hover::after {
    width: calc(100% - 2rem);
    left: 1rem;
}

.dropdown-menu {
    border: none;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin-top: 0.5rem;
}

/* ========== CONTENIDO PRINCIPAL ========== */
.main-content {
    min-height: auto;
    padding: 2rem 0;
}

.stats-card {
    background: linear-gradient(135deg, #007BFF, #0056b3);
    border-radius: 12px;
    transition: transform 0.3s;
}

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

/* ========== FOOTER ========== */
.footer-basic {
    padding: 40px 0;
    background-color: #ffffff;
    color: #4b4c4d;
}

.footer-basic ul {
    padding: 0;
    list-style: none;
    text-align: center;
    font-size: 18px;
    line-height: 1.6;
    margin-bottom: 0;
}

.footer-basic li {
    padding: 0 10px;
}

.footer-basic ul a {
    color: inherit;
    text-decoration: none;
    opacity: 0.8;
}

.footer-basic ul a:hover {
    opacity: 1;
}

.footer-basic .social {
    text-align: center;
    padding-bottom: 25px;
}

.footer-basic .social > a {
    font-size: 24px;
    width: 40px;
    height: 40px;
    line-height: 40px;
    display: inline-block;
    text-align: center;
    border-radius: 50%;
    border: 1px solid #ccc;
    margin: 0 8px;
    color: inherit;
    opacity: 0.75;
}

.footer-basic .social > a:hover {
    opacity: 0.9;
}

.footer-basic .copyright {
    margin-top: 15px;
    text-align: center;
    font-size: 13px;
    color: #aaa;
    margin-bottom: 0;
}

/* Estilos base */
body {
    background-color: #ffffff;
    color: #2c3e50;
}

/* Textos */
.text-muted {
    color: #6c757d !important;
}

.text-primary {
    color: #007BFF !important;
}

.text-dark {
    color: #2c3e50 !important;
}

.display-4, .display-5 {
    color: #2c3e50;
}

.lead {
    color: #6c757d;
}

/* Cards */
.card {
    background-color: #ffffff;
    border-color: #dee2e6;
    box-shadow: 0 .125rem .25rem rgba(0,0,0,.075);
}

/* Botones */
.btn-outline-primary {
    color: #007BFF;
    border-color: #007BFF;
}

.btn-outline-primary:hover {
    background-color: #007BFF;
    border-color: #007BFF;
    color: white;
}

.btn-primary {
    background-color: #007BFF;
    border-color: #007BFF;
}

.btn-primary:hover {
    background-color: #0056b3;
    border-color: #0056b3;
}

@media (max-width: 768px) {
    .navbar-collapse {
        padding-top: 1rem;
    }
    
    .footer-section {
        margin-bottom: 2rem;
        text-align: center;
    }
}