#back-to-top{position:fixed;right:max(24px,env(safe-area-inset-right));bottom:max(24px,env(safe-area-inset-bottom));z-index:90;width:50px;height:50px;min-height:0;display:grid;place-items:center;padding:0;border:1px solid var(--gold,var(--line,#bacdce));border-radius:50%;background:var(--deep,var(--dark,var(--ink,#193c4a)));color:var(--gold,var(--yellow,#fff));box-shadow:0 4px 18px #0003;cursor:pointer;touch-action:manipulation;transition:background-color .2s,box-shadow .2s}
#back-to-top[hidden]{display:none}
#back-to-top:hover{box-shadow:0 6px 22px #0005}
#back-to-top:focus-visible{outline:3px solid var(--gold,var(--yellow,#5c8fa3));outline-offset:4px}
body:has(dialog[open]) #back-to-top,body:has(.menu-toggle[aria-expanded="true"]) #back-to-top{display:none}
@media(max-width:600px){#back-to-top{width:46px;height:46px;right:max(16px,env(safe-area-inset-right));bottom:max(16px,env(safe-area-inset-bottom))}}
@media(prefers-reduced-motion:reduce){#back-to-top{transition:none}}