.back-to-top{position:fixed;right:max(24px,env(safe-area-inset-right));bottom:calc(24px + env(safe-area-inset-bottom));z-index:100;display:grid;place-items:center;width:48px;height:48px;padding:0;border:1px solid #ffffff70;border-radius:50%;background:#123d31;color:#fff;box-shadow:0 6px 20px #123d3130;cursor:pointer;transition:background .2s,transform .2s;touch-action:manipulation}
.back-to-top[hidden]{display:none}
.back-to-top:hover{background:#205b46;transform:translateY(-3px)}
.back-to-top:focus-visible{outline:3px solid #d5a647;outline-offset:4px}
.back-to-top svg{pointer-events:none}
@media(max-width:640px){.back-to-top{right:max(16px,env(safe-area-inset-right));bottom:calc(16px + env(safe-area-inset-bottom))}}
@media(prefers-reduced-motion:reduce){.back-to-top{transition:none}.back-to-top:hover{transform:none}}