.backBtn{position:fixed;top:72px;left:20px;z-index:9999;gap:10px;padding:11px 18px;border:none;outline:none;border-radius:999px;background:hsla(0,0%,100%,.88);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid rgba(0,0,0,.06);color:#222;font-size:14px;font-weight:600;cursor:pointer;box-shadow:0 8px 25px rgba(0,0,0,.08);transition:transform .35s cubic-bezier(.22,1,.36,1),opacity .3s,box-shadow .3s,background .3s}.backBtn,.backBtn span{display:flex;align-items:center}.backBtn span{justify-content:center;width:26px;height:26px;border-radius:50%;background:#f5f5f5;color:#333;font-size:15px;transition:.3s}.backBtn.show{transform:translateX(0);opacity:1}.backBtn.hide{transform:translateX(calc(-100% - 40px));opacity:0;pointer-events:none}.backBtn:hover{background:#fff;box-shadow:0 14px 35px rgba(0,0,0,.12);transform:translateX(-4px)}.backBtn:hover span{background:#efefef}.backBtn:active{transform:scale(.98)}@media(max-width:768px){.backBtn{top:51px;left:9px;padding:9px 15px;font-size:13px}.backBtn span{width:22px;height:22px;font-size:13px}}