#gotoTop {
    position: fixed;
    bottom: 20px;
    right: 20px;
    display: none;
    background: #333;
    color: #fff;
    border: none;
    padding: 0.5rem 1rem;
    cursor: pointer;
    border-radius: 4px;
    z-index: 1000;
}

#gotoTop:hover {
    background: #555;
}