.wp-block-cover:not(.components-placeholder).is-style-bottom-wave {
mask-image: url('data:image/svg+xml;utf8,');
mask-position: bottom;
mask-repeat: no-repeat;
mask-size: cover;
}
.wp-block-cover:not(.components-placeholder).is-style-top-wave {
mask-image: url('data:image/svg+xml;utf8,');
mask-position: top;
mask-repeat: no-repeat;
mask-size: cover;
}