.f-back-top{z-index:var(--f-back-top-z-index, 900);right:var(--f-back-top-right, 40px);bottom:var(--f-back-top-bottom, 40px);color:var(--f-back-top-color, #333);background:var(--f-back-top-background, #fff);position:fixed;min-width:40px;height:40px;padding:0 30px;box-sizing:border-box;border-radius:20px;display:inline-flex;align-items:center;justify-content:center;user-select:none;cursor:pointer;transition:.6s;box-shadow:#ededed 1px 1px 7px,#ededed -1px -1px 7px}.f-back-top.f-back-top__round{padding:0;border-radius:50%}.f-back-top:hover{box-shadow:#ddd 1px 1px 10px,#ddd -1px -1px 10px}