MediaWiki:Common.css

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/* CSS placed here will be applied to all skins */

body.page-Main_Page #mp-topbanner {
   clear: both;
}
body.page-Main_Page h1.firstHeading {
   visibility: hidden;
   font-size: 0;
}


.pg-periodic-system-of-actions {
  background-color: yellow;
  border: 1px solid;
  display: flex;
  align-items: flex-end;
  justify-content: left;
}
.pg-periodic-system-column {
  width: 90%;
  margin: 8px;
  border: 4px;
  background-color: blue;
  border: 1px solid;
}
.pg-periodic-system-cell {
  background-color: white;
  border: 1px solid;
  text-align: center;
  margin: 5px;
}

/********** obseved */
.pg-observed-action {
  position: absolute;
  width: 50px;
  height: 50px;
  top: 50%;
  left: 50%;
  margin: -50px 0 0 -50px;
  background: red;
  border-color: black;
  border-width: 13px;
  border-radius: 8%;
  backface-visibility: hidden;
}