:root {
    --primary-color: #7292d6;
    --secondary-color: #424a56;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --dark-color: #1e293b;
    --light-color: #f8fafc;
    --font-size: 12px;
    --border-radius: 12px;
    --box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
}

* {
    font-size: var(--font-size);
    box-sizing: border-box;
}

body {
    font-size: var(--font-size);
    background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
    min-height: 100vh;
}

/* Estilos modernos para tarjetas */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

.card-header {
    background: transparent;
    border-bottom: 2px solid #f1f5f9;
    padding: 1rem 1.25rem;
    font-weight: 600;
}

/* Estilos para el navbar */
.navbar {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-color)) !important;
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    padding: 0.75rem 0;
}

.navbar-brand {
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.nav-link {
    font-size: 13px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.nav-link:hover {
    transform: translateY(-1px);
    opacity: 0.9;
}

/* Sección de imágenes */
.image-upload-container {
    border: 2px dashed #cbd5e1;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    text-align: center;
    transition: all 0.3s ease;
    background: #f8fafc;
    position: relative;
    min-height: 150px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.image-upload-container.dragover {
    border-color: var(--primary-color);
    background: #eff6ff;
    transform: scale(1.02);
}

.image-upload-container i {
    font-size: 3rem;
    color: #94a3b8;
    margin-bottom: 0.5rem;
}

.image-preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.image-item {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: all 0.3s ease;
    aspect-ratio: 1;
    background: #f1f5f9;
}

.image-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1);
}

.image-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.image-item .image-actions {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    opacity: 0;
    transition: all 0.3s ease;
}

.image-item:hover .image-actions {
    opacity: 1;
}

.image-item .image-actions .btn {
    width: 32px;
    height: 32px;
    padding: 0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.image-item .badge {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    font-size: 0.6rem;
    padding: 0.25rem 0.5rem;
}

/* Sección de características */
.characteristic-item {
    background: #f8fafc;
    border-radius: var(--border-radius);
    padding: 0.75rem;
    margin-bottom: 0.75rem;
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.characteristic-item:hover {
    border-color: var(--primary-color);
    background: #eff6ff;
}

.characteristic-item .form-control {
    border: none;
    background: transparent;
    padding: 0.25rem 0.5rem;
}

.characteristic-item .form-control:focus {
    box-shadow: none;
    background: white;
}

/* Botones modernos */
.btn-modern {
    border-radius: var(--border-radius);
    padding: 0.5rem 1.25rem;
    font-weight: 600;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 11px;
}

.btn-modern:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
}

.btn-primary-modern {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
}

.btn-primary-modern:hover {
    background: linear-gradient(135deg, #1d4ed8, #2563eb);
    color: white;
}

.btn-success-modern {
    background: linear-gradient(135deg, var(--success-color), #059669);
    color: white;
    border: none;
}

.btn-success-modern:hover {
    background: linear-gradient(135deg, #059669, #047857);
    color: white;
}

.btn-danger-modern {
    background: linear-gradient(135deg, var(--danger-color), #dc2626);
    color: white;
    border: none;
}

.btn-danger-modern:hover {
    background: linear-gradient(135deg, #dc2626, #b91c1c);
    color: white;
}

/* Animaciones */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.5s ease forwards;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.slide-in {
    animation: slideIn 0.3s ease forwards;
}

/* Estilos para tabs */
.nav-tabs .nav-link {
    border: none;
    color: #64748b;
    font-weight: 600;
    padding: 0.75rem 1.25rem;
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
}

.nav-tabs .nav-link:hover {
    color: var(--primary-color);
    background: #f1f5f9;
}

.nav-tabs .nav-link.active {
    color: var(--primary-color);
    background: #eff6ff;
    border-bottom: 3px solid var(--primary-color);
}

/* Estilos para formularios */
.form-control, .form-select {
    border: 2px solid #e2e8f0;
    border-radius: var(--border-radius);
    padding: 0.5rem 0.75rem;
    transition: all 0.3s ease;
    background: white;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
    outline: none;
}

.form-control.is-invalid {
    border-color: var(--danger-color);
}

.form-label {
    font-weight: 600;
    color: #334155;
    margin-bottom: 0.25rem;
}

/* Badges modernos */
.badge-modern {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-weight: 500;
    font-size: 10px;
    letter-spacing: 0.3px;
}

/* Scrollbar personalizado */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: #f1f5f9;
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: #1d4ed8;
}

/* Responsive */
@media (max-width: 768px) {
    .image-preview-grid {
        grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    }
    
    .characteristic-item {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .characteristic-item .btn {
        width: 100%;
    }
}