.footer{position:relative;padding:1rem;color:#fff;text-align:center;margin-top:2rem;display:flex;align-items:center;justify-content:center;min-height:3rem}#toggleButton{opacity:.5;position:absolute;left:1rem;display:grid;place-items:center;width:3rem;height:3rem;padding:0;background-color:#555;color:#fff;border:none;border-radius:4px;cursor:pointer;z-index:1;transition:opacity .2s ease,background-color .2s ease}#toggleButton::after{content:"";position:absolute;inset:-.9rem}#toggleButton:hover,#toggleButton:focus-visible{opacity:1;background-color:#777}#attribution{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:max-content;max-width:calc(100% - 9rem);opacity:0;visibility:hidden;transition:opacity .3s ease,visibility .3s ease;font-size:1.3rem;line-height:1.6}#attribution.is-visible{opacity:1;visibility:visible}#attribution a{color:#4fc3f7;text-decoration:none}#attribution a:hover{text-decoration:underline}