.btn-scroll-top {
    display: none;
    position: fixed;
    right: 10px;
    bottom: 60px;
    z-index: 1;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: #e62739;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.25);
    color: #ffffff;
    border: none;
    outline: none;
    cursor: pointer;
}

.btn-scroll-top:active {
    background: #cc2333;

}