.scroll-to-top{position:fixed;bottom:2rem;right:2rem;width:3rem;height:3rem;background:var(--color-surface);border:1px solid var(--color-border);border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;opacity:0;visibility:hidden;transition:opacity .3s,visibility .3s,transform .3s,background-color .3s;box-shadow:0 4px 12px rgba(0,0,0,.1);z-index:50}.scroll-to-top.show{opacity:1;visibility:visible}.scroll-to-top:hover{background:var(--color-primary);transform:translateY(-4px);box-shadow:0 6px 16px rgba(0,0,0,.15)}.scroll-to-top:hover svg{color:#fff}.scroll-to-top svg{width:1.5rem;height:1.5rem;color:var(--color-text);transition:color .3s}@media(max-width:768px){.scroll-to-top{bottom:1.5rem;right:1.5rem;width:2.5rem;height:2.5rem}.scroll-to-top svg{width:1.25rem;height:1.25rem}}