button.scroll-to-top{position:fixed;right:24px;bottom:24px;z-index:9999;display:grid;width:52px;height:52px;place-items:center;border:1px solid #000;border-radius:50%;background:#000;color:#fff;cursor:pointer;font-size:28px;line-height:1;opacity:0;pointer-events:none;transform:translateY(12px);transition:opacity .2s ease,transform .2s ease,background .18s ease}button.scroll-to-top.is-visible{opacity:1;pointer-events:auto;transform:translateY(0)}button.scroll-to-top:focus-visible,button.scroll-to-top:hover{background:#222}button.scroll-to-top:focus-visible{outline:3px solid #999;outline-offset:3px}@media(max-width:600px){button.scroll-to-top{right:16px;bottom:16px;width:46px;height:46px;font-size:24px}}.spacer{height:100vh;display:flex;align-items:center;justify-content:center;font-size:2rem;background-color:#f8f8f8;color:#000}.animation-container{height:400vh;position:relative}.sticky-wrapper{position:sticky;height:100vh;justify-content:center;overflow:hidden;background-color:#ffffff}.expand-panel,.sticky-wrapper{top:0;display:flex;align-items:center}.expand-panel{left:0;width:100%;height:100%;background:#000000;clip-path:circle(60px at center);will-change:clip-path;flex-direction:column}.button-label,.expand-panel{position:absolute;color:#ffffff}.button-label{top:50%;left:50%;transform:translate(-50%,-50%);font-size:1.1rem;font-weight:700;transition:opacity .2s ease;text-align:center;z-index:10}.content-area{position:absolute;top:15vh;width:90%;max-width:800px;opacity:0;transition:opacity .2s ease}