SemanSemantic-UItic-UI/docs/ui/classic/elements/column.css

/*******************************
             Columns
*******************************/

/* Text Columns */
.ui.columns > .column,
.ui.column {
  width: 50%;
  margin: 0px;
  padding: 0px 4% 0px;
  float: left;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  -ms-box-sizing: border-box;
  box-sizing: border-box;

  border-left: 1px solid rgba(255, 255, 255, 0.7);
  -webkit-box-shadow: -1px 0px 0px 0px rgba(0, 0, 0, 0.15);
  -moz-box-shadow: -1px 0px 0px 0px rgba(0, 0, 0, 0.15);
  box-shadow: -1px 0px 0px 0px rgba(0, 0, 0, 0.15);
}
.ui.columns > .column:first-child,
.ui.column:first-child {
  border-left: none;
  box-shadow: none;
}

/* Sizing Combinations */
.ui.one.columns .column {
  width: 100%;
  padding-left: 3.5%;
  padding-right: 3.5%;
}
.ui.two.columns .column {
  width: 50%;
  padding-left: 3%;
  padding-right: 3%;
}
.ui.three.columns .column {
  width: 33.333%;
  padding-left: 3%;
  padding-right: 3%;
}
.ui.four.columns .column {
  width: 25%;
  padding-left: 2%;
  padding-right: 2%;
}
.ui.five.columns .column {
  width: 20%;
  padding-left: 1%;
  padding-right: 1%;
}
.ui.six.columns .column {
  width: 16.66%;
  padding-left: 0.5%;
  padding-right: 0.5%;
}
.ui.seven.columns .column {
  width: 14.28%;
  padding-left: 0.5%;
  padding-right: 0.5%;
}
.ui.eight.columns .column {
  width: 12.5%;
  padding-left: 0.25%;
  padding-right: 0.25%;
}
.ui.nine.columns .column {
  width: 11.11%;
  padding-left: 0.25%;
  padding-right: 0.25%;
}
.ui.ten.columns .column {
  width: 10%;
  padding-left: 0.2%;
  padding-right: 0.2%;
}
.ui.eleven.columns .column {
  width: 9.09%;
  padding-left: 0.2%;
  padding-right: 0.2%;
}
.ui.twelve.columns .column {
  width: 8.3333%;
  padding-left: 0.1%;
  padding-right: 0.1%;
}

/* Fitted Colums */
.ui.fitted.columns .column:first-child {
  padding-left: 0px;
}
.ui.fitted.columns .column:last-child {
  padding-right: 0px;
}

/* Simple Columns */
.ui.columns.simple .column,
.ui.column.simple {
  border-left: none;
  -webkit-box-shadow: none;
  -moz-box-shadow: none;
  box-shadow: none;
}