.brand-mark,.mini-mark{background:#14243b;object-fit:cover;overflow:hidden}
.back-to-top{position:fixed;right:26px;bottom:26px;z-index:30;display:grid;place-items:center;width:48px;height:48px;padding:0;border:1px solid rgba(88,217,232,.45);border-radius:14px;background:linear-gradient(145deg,#1b2340,#393184);color:#fff;box-shadow:0 14px 32px rgba(0,0,0,.3);cursor:pointer;opacity:0;pointer-events:none;transform:translateY(10px);transition:opacity .2s,transform .2s,filter .2s}
.back-to-top.is-visible{opacity:1;pointer-events:auto;transform:translateY(0)}
.back-to-top:hover{filter:brightness(1.16);transform:translateY(-2px)}
.back-to-top svg{width:21px;height:21px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
@media(max-width:650px){.back-to-top{right:16px;bottom:16px;width:44px;height:44px}}