.loader {
    width: 40px;
    --b: 8px;
    aspect-ratio: 1;
    border-radius: 50%;
    padding: 1px;
    background: conic-gradient(#0000 10%,#f03355) content-box;
    -webkit-mask: repeating-conic-gradient(#0000 0deg,#000 1deg 20deg,#0000 21deg 36deg), radial-gradient(farthest-side,#0000 calc(100% - var(--b) - 1px),#000 calc(100% - var(--b)));
    -webkit-mask-composite: destination-in;
    mask-composite: intersect;
    animation: l4 1s infinite steps(10);
    margin-inline: auto;
    display:none
}

@keyframes l4 {
    to {
        transform: rotate(1turn)
    }
}