.ph-parallax {
    position: relative;
    height: 100vh;
    overflow: hidden;
}

.layer {
    position: absolute;
    width: 100%;
    height: auto;
    object-fit: cover;
}

/* livelli */
.l1 { z-index: 1; }
.l2 { z-index: 2; }
.l3 { z-index: 3; }
.l4 { z-index: 4; }

/* testo sopra */
.ph-text {
    position: absolute;
    z-index: 10;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: white;
}

.ph-text h1 {
    font-size: 60px;
}

.ph-text p {
    font-size: 20px;
}

/* BLOCCO ANTI BUG */
.ph-spacer {
    height: 200px;
    background: white;
}