.scroll-to-top-button{z-index:90;right:max(22px, env(safe-area-inset-right));bottom:max(22px, env(safe-area-inset-bottom));width:52px;height:52px;color:var(--color-accent-strong);background:color-mix(in srgb, var(--color-surface-elevated) 88%, transparent);box-shadow:var(--shadow-md);opacity:0;visibility:hidden;cursor:pointer;pointer-events:none;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border:1px solid #0000;border-radius:50%;place-items:center;padding:0;transition:color .18s,background-color .18s,border-color .18s,box-shadow .18s,opacity .18s,visibility .18s,transform .18s;display:grid;position:fixed;transform:translateY(14px)scale(.92)}.scroll-to-top-button--visible{opacity:1;visibility:visible;pointer-events:auto;transform:translateY(0)scale(1)}.scroll-to-top-button span{font-size:1.35rem;font-weight:500;line-height:1;transform:translateY(-1px)}.scroll-to-top-button:hover{color:var(--color-text-inverse);background:var(--color-accent);box-shadow:var(--shadow-lg);border-color:#0000;transform:translateY(-3px)scale(1)}.scroll-to-top-button:active{transform:translateY(-1px)scale(.96)}.scroll-to-top-button:focus-visible{outline:3px solid color-mix(in srgb, var(--color-accent) 30%, transparent);outline-offset:4px}@media (width<=680px){.scroll-to-top-button{right:max(16px, env(safe-area-inset-right));bottom:max(16px, env(safe-area-inset-bottom));width:46px;height:46px}.scroll-to-top-button span{font-size:1.2rem}}@media (prefers-reduced-motion:reduce){.scroll-to-top-button{transition:color .18s,background-color .18s,border-color .18s,opacity .18s,visibility .18s;transform:none}.scroll-to-top-button:hover,.scroll-to-top-button:active{transform:none}}.scroll-to-top-button_progress{pointer-events:none;width:100%;height:100%;position:absolute;inset:0;overflow:visible;transform:rotate(-90deg)}.scroll-to-top-button_progress-track,.scroll-to-top-button_progress-value{fill:none}.scroll-to-top-button_progress-track{stroke:var(--color-border-strong);stroke-width:1.2px;opacity:.42}.scroll-to-top-button_progress-value{stroke:var(--color-accent);stroke-width:2.4px;stroke-linecap:round;stroke-dasharray:100 100;stroke-dashoffset:100px;transition:stroke .18s}.scroll-to-top-button>span{z-index:1;position:relative}.scroll-to-top-button:hover .scroll-to-top-button_progress-track{stroke:color-mix(in srgb, var(--color-text-inverse) 45%, transparent)}.scroll-to-top-button:hover .scroll-to-top-button_progress-value{stroke:var(--color-text-inverse)}@media (prefers-reduced-motion:reduce){.scroll-to-top-button_progress-value{transition:none}}