body {
    font-family: Arial, sans-serif;
    background-color: #f8f8f8;
    text-align: center;
    padding: 20px;
    background-image: url(fondo.jpg);
    background-attachment: fixed;
    background-repeat: no-repeat;
    background-size: cover;
}

.volver {
    position: absolute;
    top: 20px;
    left: 20px;
    background-color: pink;
    border-radius: 9px;
    padding: 10px;
    font-weight: bold;
    box-shadow: 2px 2px 5px rgba(0, 0, 0, 0.2);
    text-align: center;
}

.volver a {
    color: black;
    text-decoration: none;
    display: block;
}

.volver:hover {
    background-color: rgb(255, 182, 193);
}

.contenedor {
    max-width: 600px;
    margin: auto;
}

.titulo h2 {
    cursor: pointer;
    background-color: #ffccdc;
    padding: 10px;
    border-radius: 8px;
    display: inline-block;
    transition: background-color 0.3s;
}

.titulo h2:hover {
    background-color: #ff99b5;
}

.cajon {
    max-height: 0;
    overflow: hidden;
    transform-origin: top;
    transform: rotateX(90deg);
    opacity: 0;
    transition: transform 0.6s ease-out, max-height 0.6s ease-out, opacity 0.3s ease-out;
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0px 4px 8px rgba(0, 0, 0, 0.2);
    text-align: justify;
    line-height: 1.5;
    background-color: black;
    color: #ffccdc;
}

.cajon.activo {
    max-height: 500px;
    transform: rotateX(0deg);
    opacity: 1;
}