html {
    /* scroll-behavior: smooth; */
}

section {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.scroll {
    position: fixed;
    top: 50%;
    right: 0;
    width: 20px;
    height: 20px;
    display: block;
    background: #000;
    text-align: center;
    line-height: 20px;
    color: #fff;
    font-size: 10px;
    text-decoration: none;
    z-index: 10000;
}

.scroll.top {
    top: calc(95% - 20px);
    background: #44e839;
}

.scroll.bottom {
    top: calc(95% - 0px);
    background: #d80808;
}