#lehr-back-to-top{position:fixed;bottom:24px;right:auto;left:24px;width:56px;height:56px;background:#c6d300;color:#1a1a1a;border:none;border-radius:50%;font-size:26px;font-weight:700;cursor:pointer;opacity:0;pointer-events:none;z-index:9990;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 18px rgb(198 211 0 / .4),0 2px 6px rgb(0 0 0 / .15);transition:opacity 0.25s ease,background 0.25s ease,transform 0.25s ease,box-shadow 0.25s ease}#lehr-back-to-top.visible{opacity:1;pointer-events:auto}#lehr-back-to-top:hover,#lehr-back-to-top:focus{background:#d4e000;transform:translateY(-2px) scale(1.05);box-shadow:0 10px 24px rgb(198 211 0 / .5),0 4px 10px rgb(0 0 0 / .2)}