Group repeated CSS properties together into one rule, then add the selectors that share these properties into it.

Before

.button {
  display: inline-block;
  padding: 5px;
  border-radius: 12px;
}
.field {
  display: inline-block;
  padding: 5px;
  border-radius: 12px;
}
.column {
  float: left;
  padding: 5px;
  border-radius: 12px;
}

After

.button, 
.field, 
.column {
  padding: 5px;
  border-radius: 12px;
}
.button, 
.field {
  display: inline-block;
}
.column {
  float: left;
}