.custom-body{background:linear-gradient(180deg,#f0f8ff,#e6f7ff);font-family:Arial,sans-serif;height:2000px;margin:0;padding:0}.back-to-top{align-items:center;background:transparent;border:2px solid #48b0ff;border-radius:50%;bottom:20px;box-shadow:0 4px 6px rgba(0,0,0,.2);cursor:pointer;display:flex;height:40px;justify-content:center;left:20px;opacity:0;position:fixed;transition:opacity .3s,visibility .3s,background .3s,border-color .3s;visibility:hidden;width:40px}.back-to-top.show{opacity:1;visibility:visible}.back-to-top:hover{background:#48b0ff;border-color:#48b0ff}.back-to-top-arrow{border-left:3px solid #48b0ff;border-top:3px solid #48b0ff;height:15px;margin-top:7px;transform:rotate(45deg);transition-duration:.5s;transition-property:transform,border-color;width:15px}.back-to-top:hover .back-to-top-arrow{border-color:#fff}