kazhnuz.css/src/scss/components/_input.scss

.input-group {
  padding-bottom:$lineheight;

  input, textarea {
    width:100%;
    background-color:$color-background;
    border-radius:0px;
    border: 1px solid rgba(0,0,0,0.2);
    padding:$lineheight/4;
  }
}