.back-to-top{position:fixed;right:max(20px,env(safe-area-inset-right));bottom:max(20px,env(safe-area-inset-bottom));z-index:55;display:grid;place-items:center;width:48px;height:48px;border:1px solid rgba(255,255,255,.28);border-radius:50%;background:#4b2ebf;color:#fff;box-shadow:0 8px 22px rgba(16,20,56,.22);font:700 27px/1 Montserrat,Arial,sans-serif;cursor:pointer;transition:transform .18s ease,background .18s ease}
.back-to-top[hidden]{display:none}
.back-to-top:hover{background:#31208c;transform:translateY(-3px)}
.back-to-top:focus-visible{outline:3px solid #e9cf72;outline-offset:3px}
@media(max-width:600px){.back-to-top{right:max(16px,env(safe-area-inset-right));bottom:max(16px,env(safe-area-inset-bottom));width:44px;height:44px;font-size:25px}}
@media(prefers-reduced-motion:reduce){.back-to-top{transition:none}.back-to-top:hover{transform:none}}