.scroll-top-btn{position:fixed;bottom:30px;right:30px;width:50px;height:50px;border-radius:50%;border:none;background:var(--button-color);color:#fff;font-size:22px;cursor:pointer;opacity:0;pointer-events:none;transition:opacity .3s ease,transform .3s ease;z-index:1000}.scroll-top-btn.show{opacity:1;pointer-events:auto;transform:translateY(0)}.scroll-top-btn:hover{transform:scale(1.1);background:var(--button-color-hover)}.btn{display:flex;justify-self:center}