.loader {
    width: 90px;
    height: 14px;
    box-shadow: 0 3px 0 #001824;
    position: relative;
    clip-path: inset(-40px 0 -5px);
}

    .loader:before {
        content: "";
        position: absolute;
        inset: auto calc(50% - 17px) 0;
        height: 50px;
        --g: no-repeat linear-gradient(#00293d 0 0);
        background: var(--g),var(--g),var(--g),var(--g);
        background-size: 16px 14px;
        animation: l7-1 2s infinite linear, l7-2 2s infinite linear;
    }

@keyframes l7-1 {
    0%, 100% {
        background-position: 0 -50px,100% -50px
    }

    17.5% {
        background-position: 0 100%,100% -50px,0 -50px,100% -50px
    }

    35% {
        background-position: 0 100%,100% 100%,0 -50px,100% -50px
    }

    52.5% {
        background-position: 0 100%,100% 100%,0 calc(100% - 16px),100% -50px
    }

    70%, 98% {
        background-position: 0 100%,100% 100%,0 calc(100% - 16px),100% calc(100% - 16px)
    }
}

@keyframes l7-2 {
    0%,70% {
        transform: translate(0)
    }

    100% {
        transform: translate(200%)
    }
}