.imagen-marco {
    border: 4px solid transparent;
    padding: 8px;
    background: linear-gradient(135deg, #f6e8d5, #e5b97d, #cf7e34, #6d3f1f);
    box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.3), 
                inset 2px 2px 4px rgba(255, 215, 0, 0.2);
    border-radius: 4px;
    filter: contrast(1.1) saturate(1.1);
    display: block;
    width: fit-content;
    transition: transform 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.imagen-marco:hover {
    transform: scale(1.02);
    box-shadow: 0px 0px 15px rgba(255, 140, 0, 0.4);
}