/* HTML: <div class="loader"></div> */
.content-loader {
    width: 60px;
    aspect-ratio: 4;
    --_g: no-repeat radial-gradient(circle closest-side,#000 90%,#0000);
    background:
        var(--_g) 0%   50%,
        var(--_g) 50%  50%,
        var(--_g) 100% 50%;
    background-size: calc(100%/3) 100%;
    animation: l7 1s infinite linear;
}
@keyframes l7 {
    33%{background-size:calc(100%/3) 0%  ,calc(100%/3) 100%,calc(100%/3) 100%}
    50%{background-size:calc(100%/3) 100%,calc(100%/3) 0%  ,calc(100%/3) 100%}
    66%{background-size:calc(100%/3) 100%,calc(100%/3) 100%,calc(100%/3) 0%  }
}