.back-to-top{position:fixed;right:28px;bottom:28px;z-index:1000;width:58px;height:58px;border:1px solid #d6e0e8;border-radius:17px;background:rgba(255,255,255,.94);box-shadow:0 12px 35px rgba(30,55,75,.16);color:#17181b;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:0;cursor:pointer;opacity:0;visibility:hidden;transform:translateY(14px) scale(.94);transition:opacity .25s,visibility .25s,transform .25s,box-shadow .25s,background .25s}.back-to-top.visible{opacity:1;visibility:visible;transform:none}.back-to-top:hover{background:#111;color:#fff;box-shadow:0 16px 38px rgba(20,35,50,.22);transform:translateY(-3px)}.back-to-top span{font-size:24px;line-height:20px;font-weight:500}.back-to-top small{font-size:7px;line-height:10px;letter-spacing:.1em;font-weight:700}.back-to-top:active{transform:translateY(0) scale(.96)}@media(max-width:600px){.back-to-top{right:16px;bottom:16px;width:50px;height:50px;border-radius:15px}.back-to-top span{font-size:21px}.back-to-top small{font-size:6px}}