.zsl-lazy-section {
    content-visibility: auto;
    contain-intrinsic-size: auto var(--zsl-intrinsic-height, 800px);
}

.zsl-hard-deferred-iframe:not([src]) {
    background: transparent;
}

html.zsl-debug .zsl-lazy-section {
    outline: 2px dashed rgba(255, 153, 0, .85);
    outline-offset: -2px;
}

html.zsl-debug .zsl-lazy-section.zsl-near-viewport {
    outline-style: solid;
}