.back-to-top{position:fixed;right:max(24px,env(safe-area-inset-right));bottom:calc(24px + env(safe-area-inset-bottom));z-index:50;width:50px;height:50px;display:grid;place-items:center;padding:0;border:1px solid #ffffff80;border-radius:50%;background:#164d43;color:#fff;box-shadow:0 5px 20px #123f3c38;cursor:pointer;touch-action:manipulation;transition:background .15s,box-shadow .15s}
.back-to-top[hidden]{display:none}
.back-to-top svg{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.back-to-top:hover{background:#236652;box-shadow:0 6px 24px #123f3c50}
.back-to-top:focus-visible{outline:3px solid #a36c25;outline-offset:4px}
@media(max-width:600px){.back-to-top{right:calc(16px + env(safe-area-inset-right));bottom:calc(16px + env(safe-area-inset-bottom));width:48px;height:48px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.back-to-top{transition:none}}