.#{$prefix}form-radio {
width: $form-radio-size;
height: $form-radio-size;
background: theme-background-image($form-radio-image) no-repeat;
}
.#{$prefix}form-cb-checked .#{$prefix}form-radio {
background-position: 0 (0 - $form-radio-size);
}
.#{$prefix}form-radio-focus {
background-position: (0 - $form-radio-size) 0;
}
.#{$prefix}form-cb-checked {
.#{$prefix}form-radio-focus {
background-position: (0 - $form-radio-size) (0 - $form-radio-size);
}
}