.back-to-top{position:fixed;right:22px;bottom:max(22px,var(--back-to-top-offset,22px));z-index:90;display:grid;place-items:center;width:48px;height:48px;padding:0;border:1px solid var(--line,#cbd5e1);border-radius:14px;background:var(--green,#6554ef);color:var(--white,#fff);box-shadow:0 5px 20px #0002;cursor:pointer;transition:background .18s,transform .18s}
.back-to-top[hidden],.menu-open .back-to-top{display:none}
.back-to-top:hover{transform:translateY(-3px)}
.back-to-top:focus-visible{outline:3px solid var(--ink,#1b2d40);outline-offset:4px}
.back-to-top .icon{width:23px;height:23px}
html[data-theme=dark] .back-to-top{color:var(--paper,#14212c)}
@media(max-width:760px){.back-to-top{right:14px;bottom:max(calc(16px + env(safe-area-inset-bottom)),var(--back-to-top-offset,16px));width:46px;height:46px;border-radius:12px}}
@media(prefers-reduced-motion:reduce){.back-to-top{transition:none}.back-to-top:hover{transform:none}}
@media print{.back-to-top{display:none!important}}