/* Shared floating control; no page layout or existing component styles are changed. */
.back-to-top{position:fixed;right:max(18px,calc(env(safe-area-inset-right,0px) + 12px));bottom:calc(max(18px,calc(env(safe-area-inset-bottom,0px) + 12px)) + var(--back-to-top-lift,0px));z-index:9;display:grid;place-items:center;width:44px;height:44px;padding:0;border:1px solid var(--line);border-radius:2px;background:var(--dark);color:var(--paper);cursor:pointer;transition:color .18s,border-color .18s,background .18s}
.back-to-top[hidden]{display:none}
.back-to-top svg{display:block;width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.back-to-top:focus-visible{outline:2px solid var(--olive);outline-offset:3px;border-color:var(--olive)}
@media(hover:hover){.back-to-top:hover{color:var(--olive);background:var(--ink);border-color:var(--olive)}}
@media(prefers-reduced-motion:reduce){.back-to-top{transition:none}}