#btnRegresar {
    position: absolute;
    top: 20px;
    left: 20px;
    background-color: #6c757d;
    color: white;
    padding: 10px 15px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    transition: background 0.3s, transform 0.2s;
}

#btnRegresar:hover {
    background-color: #5a6268;
    transform: scale(1.05);
}