Module:Portal/styles.css

/* {{pp-template}} */
.portalbox {
 padding: 0; /* Timeless adds padding */
 margin: 0.5em 0;
 display: table;
 box-sizing: border-box;
 max-width: 175px;
 list-style: none;
}

.portalborder {
 border: solid #aaa 1px;
 padding: 0.1em;
 background: #f9f9f9;
}

.portalbox-entry {
 display: table-row;
 font-size: 85%;
 line-height: 110%;
 height: 1.9em; /* sets min height */
 font-style: italic;
 font-weight: bold;
}

.portalbox-image {
 display: table-cell;
 padding: 0.2em;
 vertical-align: middle;
 text-align: center;
}

.portalbox-link {
 display: table-cell;
 padding: 0.2em 0.2em 0.2em 0.3em;
 vertical-align: middle;
}

@media (min-width: 720px) {
 .portalleft {
  clear: left;
  float: left;
  margin: 0.5em 1em 0.5em 0
 }
 
 .portalright {
  clear: right;
  float: right;
  margin: 0.5em 0 0.5em 1em
 }
}

/* forced night mode */
html.skin-theme-clientpref-night .portalbox {
      background: transparent;
}
@media (prefers-color-scheme: dark) {
    /* automatic mode */
    html.skin-theme-clientpref-os .pane{
      background: transparent;
    }
}