#scroll-to-top {    
    position: fixed;
    bottom: 10px;
    right: 10px;
    background: var(--main-color);
    color: white;
    height: 50px;
    width: 50px;
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 10;
    cursor: pointer;
}