/* 編集画面だけでサムネを小さくする */
.editor-styles-wrapper .wp-block-lazyblock-selectLecture .selectLecture_thumb img,
.editor-styles-wrapper .wp-block-lazyblock-selectLecture .selectLecture_thumb {
    max-width: 300px !important;
    width: 100% !important;
    height: auto !important;
    object-fit: cover;
}

/* 16:9 に収めたい場合（任意） */
.editor-styles-wrapper .wp-block-lazyblock-selectLecture .selectLecture_thumb {
    aspect-ratio: 16 / 9;
    overflow: hidden;
}