Module:Message box/sandbox/ombox.css

 .ombox{
 margin:4px0;
 border-collapse:collapse;
 border:1pxsolid#a2a9b1;/* Default "notice" gray */
 background-color:var(--background-color-neutral-subtle,#f8f9fa);
 box-sizing:border-box;
 color:var(--color-base,#202122);
 }

 /* For the "small=yes" option. */
 .ombox.mbox-small{
 font-size:88%;
 line-height:1.25em;
 }

 .ombox-speedy{
 border:2pxsolid#b32424;/* Red */
 background-color:#fee7e6;/* Pink */
 }

 .ombox-delete{
 border:2pxsolid#b32424;/* Red */
 }

 .ombox-content{
 border:1pxsolid#f28500;/* Orange */
 }

 .ombox-style{
 border:1pxsolid#fc3;/* Yellow */
 }

 .ombox-move{
 border:1pxsolid#9932cc;/* Purple */
 }

 .ombox-protection{
 border:2pxsolid#a2a9b1;/* Gray-gold */
 }

 .ombox.mbox-text{
 border:none;
 /* @noflip */
 padding:0.25em0.9em;
 width:100%;
 }

 .ombox.mbox-image{
 border:none;
 /* @noflip */
 padding:2px02px0.9em;
 text-align:center;
 }

 .ombox.mbox-imageright{
 border:none;
 /* @noflip */
 padding:2px0.9em2px0;
 text-align:center;
 }

 /* An empty narrow cell */
 .ombox.mbox-empty-cell{
 border:none;
 padding:0;
 width:1px;
 }

 .ombox.mbox-invalid-type{
 text-align:center;
 }

 @media(min-width:720px){
 .ombox{
 margin:4px10%;
 }

 .ombox.mbox-small{
 /* @noflip */
 clear:right;
 /* @noflip */
 float:right;
 /* @noflip */
 margin:4px04px1em;
 width:238px;
 }
 }


 @mediascreen{
 html.skin-theme-clientpref-night.ombox-speedy{
 background-color:#310402;/* Dark red, same hue/saturation as light */
 }
 }


 @mediascreenand(prefers-color-scheme:dark){
 html.skin-theme-clientpref-os.ombox-speedy{
 background-color:#310402;/* Dark red, same hue/saturation as light */
 }
 }

 /** T367463 */
 body.skin--responsivetable.omboximg{
 max-width:none!important;
 }