.loading {
    position: fixed;
    z-index: 99999;
    height: 100px;
    width: 100px;
    padding: 10px;
    aspect-ratio: 1;
    border-radius: 50%;
    margin: auto;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    display: none;
    background: rgba(37, 176, 155, 0.8);
    --_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;
}

@keyframes l3 {
    to {
        transform: rotate(1turn);
    }
}

.loading:before {
    content: '';
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(108, 117, 125, 0.5);
}