.scroll-to-top{position:fixed;bottom:20px;right:20px;width:40px;height:40px;background:var(--glass-bg);border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:var(--shadow-medium);border:1px solid var(--glass-border);opacity:0;transform:translateY(20px);transition:opacity .3s ease,transform .3s ease;z-index:1100}.scroll-to-top.visible{opacity:1;transform:translateY(0)}.scroll-to-top:hover{background:#fff;box-shadow:var(--shadow-heavy)}.scroll-to-top::before{content:"↑";font-size:20px;color:var(--accent-color);font-weight:700}@media (max-width:768px){.scroll-to-top{width:36px;height:36px;bottom:15px;right:15px}}