barebones/css/_forms.scss

input, 
select, 
textarea {
  background-color: $base-background-colour;
  border: solid 1px $base-colour;
  color: $base-colour;
  display: inline-block;
  font: inherit;
  line-height: $base-margin-bottom;
  padding: ($base-margin-bottom / 4) ($base-margin-bottom / 2);
  width: 300px;
}

input[type="checkbox"], 
input[type="radio"] {
  background: transparent;
  border: 0;
  width: auto;
}

textarea {
  min-height: ($base-margin-bottom * 4);
}

.form__group {
  margin-bottom: $base-margin-bottom;
}

.form__label {
  font-weight: bold;
}

.form__controls {
  @extend .clearfix;
}

.btn {
  background-color: $base-colour;
  border: 0;
  color: $base-background-colour;
  cursor: pointer;
  display: inline-block;
  height: ($base-margin-bottom * 1.5);
  line-height: ($base-margin-bottom * 1.5);
  padding: 0 $base-margin-bottom;
  text-align: center;
  width: auto;
}