html, body, #form1 {
    background-color: #ffffff;
    height: 100% !important;
}



.nav-arrow {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    z-index: 999;
    padding: 10px 10px;
    border-radius: 30px;
    transition: background-color 0.3s;
    background-color: rgba(0,0,0,0.5);
}

    .nav-arrow:hover {
        background-color: rgba(255,255,255,0.5);
    }