.spinner{
    z-index: 999;
    position: absolute;
    width: 150px;
    padding: 20px;
    aspect-ratio: 1;
    border-radius: 50%;
    background: #25b09b;
    --_m: 
        conic-gradient(#0000 10%,#000),
        linear-gradient(#000 0 0) content-box;
    -webkit-mask: var(--_m);
            mask: var(--_m);
    -webkit-mask-composite: source-out;
            mask-composite: subtract;
    animation: l3 1s infinite linear;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    margin: auto;
}
@keyframes l3 {to{transform: rotate(1turn)}}