article table {
  width: 400px;
  margin: auto;
}

article table tbody tr:nth-child(even) {
  background-color: inherit;
}

article table tbody td {
    min-width: 210px;
}

#input-grid {
  padding: 20px 10px;
  position: relative;
  overflow: hidden;
  display: inline-block;
  float: left;
}

#output-grid {
  padding: 20px 10px;
  position: relative;
  overflow: hidden;
  display: inline-block;
  min-height: 340px;
}

#errors {
  /* float:left; */
  color: #a00;
  text-align: center;
  font-weight: bold;
}

#input-output {
  min-height: 390px;
}

#input-output .row {
  float: left;
  font-size: 0;
  display: block;
  clear: both;
}

#input-output .row div{
  background: #fff;
  width: 15px;
  height: 15px;
  display: inline-block;
  border-left: 1px solid #555;
  border-top: 1px solid #555;
}

#input-output .row div:first-child {
  border-left: none;
}

#input-output .row:first-child div {
  border-top: none;
}

#input-output .row div.window-left {
  border-left: 1px solid #a100ff !important;
}

#input-output .row div.window-top {
  border-top: 1px solid #a100ff !important;
}

#input-output .row div.window-right {
  border-right: 1px solid #a100ff !important;
}

#input-output .row div.window-bottom {
  border-bottom: 1px solid #a100ff !important;
}

#controls {
  width: 100%;
  background-color: #ffffff08;
  margin: 20px 0;
}