.back-to-top{position:fixed;right:max(20px,env(safe-area-inset-right));bottom:calc(var(--back-top-bottom,24px) + var(--floating-contact-offset,0px) + env(safe-area-inset-bottom));z-index:800;display:flex;align-items:center;justify-content:center;width:50px;height:50px;padding:0;border:1px solid rgba(255,255,255,.6);border-radius:50%;background:#ef3155;color:#fff;box-shadow:0 6px 24px rgba(180,26,55,.2);cursor:pointer;opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity .24s ease,transform .24s ease,visibility .24s,background .18s; -webkit-tap-highlight-color:transparent}
.back-to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.back-to-top svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.back-to-top.is-visible svg{animation:back-top-hint 1.3s ease-in-out 2}
.back-to-top:hover{background:#d92448;transform:translateY(-3px)}
.back-to-top:focus-visible{outline:3px solid #222;outline-offset:4px}
.back-to-top-label{position:absolute;right:62px;padding:7px 11px;border-radius:9px;background:#252528;color:white;white-space:nowrap;font:500 12px/1.4 Arial,sans-serif;opacity:0;visibility:hidden;transition:opacity .18s;pointer-events:none}
.back-to-top:hover .back-to-top-label,.back-to-top:focus-visible .back-to-top-label{opacity:1;visibility:visible}
@keyframes back-top-hint{0%,100%{transform:translateY(0)}50%{transform:translateY(-4px)}}
@media(max-width:600px){.back-to-top{right:max(16px,env(safe-area-inset-right));width:46px;height:46px}.back-to-top-label{display:none}}
@media(prefers-reduced-motion:reduce){.back-to-top,.back-to-top-label{transition:none}.back-to-top.is-visible svg{animation:none}}