.mt-back-top{--mt-back-top-left: auto;--mt-back-top-right: 40px;--mt-back-top-bottom: 40px;--mt-back-top-z-index: 1000;--mt-back-btn-after-text: "TOP";position:fixed;display:flex;align-items:center;justify-content:center;width:48px;height:48px;font-size:12px;text-align:center;text-decoration:none;color:#fff;background-color:#0009;bottom:var(--mt-back-top-bottom, 40px);z-index:var(--mt-back-top-z-index, 1000);cursor:pointer;transition:background-color .3s ease;opacity:0}.mt-back-top:hover{background-color:#000c}.mt-back-top--left{left:var(--mt-back-top-left, auto);right:auto}.mt-back-top--right{left:auto;right:var(--mt-back-top-right, 40px)}.mt-back-top .mt-icon-sort-up{display:flex;flex-direction:column;align-items:center;justify-content:center}.mt-back-top .mt-icon-sort-up:before{content:"";width:0;height:0;border-left:10px solid transparent;border-right:10px solid transparent;border-bottom:10px solid #fff;margin-bottom:4px}.mt-back-top .mt-icon-sort-up:after{content:var(--mt-back-btn-after-text, "TOP");font-size:10px;line-height:1}.mt-sort-up-visible{opacity:1}