/* HTML: <div class="loader"></div> */
.loader-container {
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.3);
    position: fixed;
    z-index: 9999;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    display: none;
}

.loader {
    position: fixed;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    z-index: 99999;
}

/* HTML: <div class="loader"></div> */
.loader {
    width: 60px;
    aspect-ratio: 2;
    --_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) 50%;
    animation: l3 1s infinite linear;
}

@keyframes l3 {
    20% {
        background-position: 0% 0%, 50% 50%, 100% 50%
    }

    40% {
        background-position: 0% 100%, 50% 0%, 100% 50%
    }

    60% {
        background-position: 0% 50%, 50% 100%, 100% 0%
    }

    80% {
        background-position: 0% 50%, 50% 50%, 100% 100%
    }
}