:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --background-color: #f5f6fa;
    --text-color: #2c3e50;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
}

.card {
    border: none;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

.btn-primary {
    background-color: var(--secondary-color);
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
}

.form-control {
    border-radius: 5px;
    padding: 10px;
    border: 1px solid #ddd;
}

.form-control:focus {
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.25);
}

/* Estilos para la página de envíos */
.shipping-form {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

.social-media-selector {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.social-option {
    cursor: pointer;
    transition: all 0.3s ease;
}

.social-option .card {
    border: 2px solid #ddd;
    transition: all 0.3s ease;
}

.social-option:hover .card {
    border-color: var(--secondary-color);
    transform: translateY(-5px);
}

.social-option.selected .card {
    border-color: var(--secondary-color);
    background-color: #f8f9fa;
}

.social-option i {
    color: var(--secondary-color);
}

.social-option.selected i {
    color: var(--accent-color);
}

.social-input {
    transition: all 0.3s ease;
}

.social-input input {
    border-color: var(--secondary-color);
}

.social-input input:focus {
    box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.25);
}

/* Estilos para el visor de imágenes */
.image-preview {
    width: 100%;
    max-width: 300px;
    height: 200px;
    border: 2px dashed #ddd;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 20px 0;
    overflow: hidden;
}

.image-preview img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

/* Estilos para la barra de navegación */
.navbar {
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.navbar-brand {
    font-weight: bold;
    font-size: 1.5rem;
}

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

.nav-link i {
    margin-right: 0.5rem;
}

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

.nav-link.active {
    background-color: rgba(255,255,255,0.2);
}

/* Responsive */
@media (max-width: 768px) {
    .shipping-form {
        padding: 20px;
    }
    
    .social-media-selector {
        grid-template-columns: 1fr;
    }
    
    .navbar-nav {
        margin-top: 1rem;
    }
    
    .nav-link {
        padding: 0.75rem 1rem;
    }
}