Template:Deadline/styles.css

 .deadline{
 margin:2px0;
 background-color:var(--background-color-warning-subtle,#fef6e7);
 color:var(--color-subtle,#54595d);
 border:1pxsolidvar(--border-color-warning,#a66200);
 border-left-width:10px;
 padding:.5em2px;
 text-align:center;
 }