.spinner{animation:rotateSpinner .8s linear infinite;border:2px solid #000;border-radius:50%;border-right-color:transparent;height:22px;width:22px}@keyframes rotateSpinner{0%{transform:rotate(0)}to{transform:rotate(1turn)}}html{scroll-behavior:smooth}input[type=checkbox]{display:none}input[type=checkbox]+label:before{border:2px solid #fff;content:"";display:block;height:20px;left:0;opacity:.6;position:absolute;top:7px;transition:all .12s,border-color .08s;width:20px}input[type=checkbox]:checked+label:before{border-left-color:transparent;border-radius:0;border-top-color:transparent;left:5px;opacity:1;top:0;transform:rotate(45deg);width:10px}