.header_sec {
    background-image: url(../img/1392x960persiane.jpg);
}
.frecciaDx, .frecciaSx{
    width: 35px;
    height: 35px;
    position: absolute;
    background-color: var(--rosso);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50px;
    color: white;
    font-weight: 800;
}
.frecciaDx:hover,
.frecciaSx:hover{
    cursor: pointer;
}
.frecciaDx{
    right: 0;
}
.frecciaSx{
    left: 0;
}