.cu-backtop{position:fixed}.cu-backtop__container{display:flex;justify-content:center;align-items:center;font-size:20px;cursor:pointer;width:var(--cu-backtop-size);height:var(--cu-backtop-size);border-radius:var(--cu-border-radius);background-color:#fff;border:1px solid var(--cu-border-color);box-shadow:0 0 4px rgba(0,0,0,.12),0 0 6px rgba(0,0,0,.04);transition:all .2s}.cu-backtop__container:hover{color:var(--cu-color-primary)}