JezK
Edit File: meta-box.css
.generate-meta-box-content > div { padding: 12px; } #generate_layout_options_meta_box .inside { padding: 0; margin:0; } #generate-meta-box-container .generate-meta-box-menu { position: relative; float: left; list-style: none; width: 180px; line-height: 1em; margin: 0 0 -1px 0; padding: 0; background-color: #fafafa; border-right: 1px solid #eee; box-sizing: border-box; } #generate-meta-box-container .generate-meta-box-menu li { display: block; position: relative; margin: 0; padding: 0; line-height: 20px; } #generate-meta-box-container .generate-meta-box-menu li a { display: block; margin: 0; padding: 10px; line-height: 20px !important; text-decoration: none; border-bottom: 1px solid #eee; box-shadow: none; } #generate-meta-box-container .generate-meta-box-content { float: left; width: calc( 100% - 180px ); margin-left: -1px; border-left: 1px solid #eee; background-color: #fff; } #generate-meta-box-container { overflow: hidden; background: #fff; background: linear-gradient( 90deg, #fafafa 0%, #fafafa 180px, #fff 180px, #fff 100% ); } #generate-meta-box-container .current { position: relative; font-weight: bold; background-color: #e0e0e0; } #generate-meta-box-container .current a { color: #555; } #generate-meta-box-container label { font-weight: 400; display: inline-block; margin-bottom: 3px; } .generate-meta-box-menu li { display: inline-block; } #side-sortables #generate-meta-box-container .generate-meta-box-menu, #side-sortables #generate-meta-box-container .generate-meta-box-content { float: none; width: 100%; margin: 0; border: 0; } .edit-post-meta-boxes-area.is-side .generate-meta-box-content > div { display: block !important; } .edit-post-meta-boxes-area.is-side .generate-meta-box-menu { display: none; } #generate-meta-box-container label { display: none; } .edit-post-meta-boxes-area.is-side #generate-meta-box-container label.generate-layout-metabox-section-title { display: block; font-weight: 500; margin-bottom: 5px; }