body {
    margin: 0;
    padding: 0;
    height: 100%;
    position: relative;
    background-image: url('../../resources/img/fondos/sanmames.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background-color: rgba(0,0,0,0.4); /* negro con opacidad 0.4 */
}

.content {
    position: relative;  /* para que quede encima del overlay */
    z-index: 2;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}


/* Botón (el <a>) */
.ttbButton{
    display: inline-block;
    padding: 0.6rem 1rem;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    font-size: 2rem;
    color: #fff;

    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.14);

    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);

    box-shadow: 0 6px 18px rgba(0,0,0,0.25);
    cursor: pointer;
    transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.ttbButton:hover{
    transform: translateY(-3px);
    box-shadow: 0 10px 24px rgba(0,0,0,0.30);
}