.wave-overlay {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;

    display: none;
    overflow: hidden;

    background-color: rgba(0, 0, 0, .025);
}

.wave-overlay_transparent {
    background-color: transparent;
}

.wave-overlay_progress {
    display: block;
}

.wave-overlay_progress::after {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;

    content: '';

    background-image: linear-gradient(90deg, #fff0 0, #fff3 70%, #fff9 90%, #fff0);

    transform: translateX(-100%);
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    100% {
        transform: translateX(100%);
    }
}
