.scroll-to-top{position:fixed;bottom:32px;right:32px;width:52px;height:52px;display:flex;align-items:center;justify-content:center;background:var(--primary);border:none;border-radius:50%;color:var(--text-inverse);cursor:pointer;z-index:1000;opacity:0;visibility:hidden;transform:translateY(20px) scale(.8);transition:opacity .3s cubic-bezier(.22,1,.36,1),visibility .3s cubic-bezier(.22,1,.36,1),transform .3s cubic-bezier(.22,1,.36,1),background .2s ease-out,box-shadow .3s cubic-bezier(.22,1,.36,1);box-shadow:var(--shadow-lg);overflow:hidden}.scroll-to-top:before{content:none}.scroll-to-top:after{content:none}.scroll-to-top--visible{opacity:1;visibility:visible;transform:translateY(0) scale(1)}.scroll-to-top:hover{transform:translateY(-4px) scale(1.1);box-shadow:var(--shadow-glow)}.scroll-to-top:active{transform:translateY(-2px) scale(1.02)}.scroll-to-top svg{position:relative;z-index:1;transition:transform .2s cubic-bezier(.22,1,.36,1);filter:none;color:currentColor}.scroll-to-top:hover svg{transform:translateY(-2px);filter:none}[data-theme=light] .scroll-to-top,:root:not([data-theme=dark]) .scroll-to-top{background:var(--primary);color:var(--text-inverse);box-shadow:var(--shadow-lg)}[data-theme=light] .scroll-to-top:hover,:root:not([data-theme=dark]) .scroll-to-top:hover{background:var(--primary-dark);box-shadow:var(--shadow-glow)}.theme-dark .scroll-to-top,[data-theme=dark] .scroll-to-top{background:#ffffff1a;color:var(--text-primary);border:1px solid rgba(255,255,255,.1);backdrop-filter:blur(8px);box-shadow:0 8px 16px #00000080}.theme-dark .scroll-to-top:hover,[data-theme=dark] .scroll-to-top:hover{background:#ffffff26;border-color:#fff3;transform:translateY(-4px) scale(1.1)}[data-theme=light] .scroll-to-top svg,:root:not([data-theme=dark]) .scroll-to-top svg{color:currentColor}[data-theme=light] .scroll-to-top:hover svg,:root:not([data-theme=dark]) .scroll-to-top:hover svg{color:currentColor}@media (max-width: 768px){.scroll-to-top{bottom:24px;right:24px;width:50px;height:50px}.scroll-to-top svg{width:18px;height:18px}}@media (max-width: 480px){.scroll-to-top{bottom:20px;right:20px;width:46px;height:46px}}@media (prefers-reduced-motion: reduce){.scroll-to-top{transition:opacity .2s,visibility .2s,transform .2s}.scroll-to-top:hover{transform:translateY(-2px) scale(1.02)}.scroll-to-top__circle{animation:none;opacity:0}.scroll-to-top svg{transition:none}}