.back-to-top{z-index:90;border:1px solid var(--border,var(--md-border,#ffffff1f));background:color-mix(in srgb, var(--surface,var(--md-card,#141b22)) 92%, transparent);-webkit-backdrop-filter:blur(12px);width:2.75rem;height:2.75rem;color:var(--foreground,var(--md-text,#e8edf2));cursor:pointer;border-radius:999px;justify-content:center;align-items:center;transition:transform .15s,background .15s,border-color .15s;display:inline-flex;position:fixed;bottom:5.25rem;right:1rem;box-shadow:0 10px 28px #00000059}.back-to-top:hover{background:color-mix(in srgb, var(--surface,var(--md-card,#141b22)) 98%, var(--foreground,#fff) 2%);border-color:color-mix(in srgb, var(--primary,var(--md-accent,#2b5f60)) 35%, var(--border,#ffffff1f));transform:translateY(-2px)}.back-to-top:active{transform:translateY(0)}@media (max-width:1023px){.back-to-top{right:.85rem;bottom:calc(4.75rem + 3rem + .75rem + env(safe-area-inset-bottom,0px))}}