button#scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 42px;
    height: 42px;
    border-radius: 8px;
    background: #f5f5f5;
    border: 1px solid #dcdcdc;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 9999;
    opacity: 0;
    pointer-events: none;
    transition: opacity .2s ease, background .2s ease;
    padding: 0;
    margin: 0;
    box-shadow: none;
    text-decoration: none;
}
button#scroll-to-top.visible {
    opacity: 1;
    pointer-events: auto;
}
button#scroll-to-top:hover {
    background: #eaeaea;
}
button#scroll-to-top:focus {
    outline: none;
}
button#scroll-to-top:focus-visible {
    outline: 2px solid #999;
    outline-offset: 2px;
}
button#scroll-to-top svg {
    width: 18px !important;
    height: 18px !important;
    fill: none !important;
    stroke: #222222 !important;
    stroke-width: 2 !important;
    stroke-linecap: round !important;
    stroke-linejoin: round !important;
    pointer-events: none;
    display: block;
}
button#scroll-to-top svg polyline {
    stroke: #222222 !important;
    fill: none !important;
}