message: added base-line-height variable
diff: @@ -184,6 +184,8 @@ $error-background-color: lighten($error-color, 30%);
  $header-height: 275px;
  $font-size: 14px;
  +$base-line-height: 2.5em;
  +
  .sv_main {
  position: relative;
  width: 100%;
  @@ -212,7 +214,7 @@ $font-size: 14px;
  font-size: 0.85em;
  font-weight: bold;
  color: $body-background-color;
  - line-height: 2.5em;
  + line-height: $base-line-height;
  background-color: $main-color;
  border: none;
  min-width: 100px;
  @@ -405,7 +407,7 @@ $font-size: 14px;
  }
  input[type="color"] {
  - min-height: 2.5em;
  + min-height: $base-line-height;
  padding: 0;
  }
  @@ -465,11 +467,11 @@ $font-size: 14px;
  }
  fieldset.sv_qcbc {
  - line-height: 2.5em;
  + line-height: $base-line-height;
  }
  .sv_q_rating {
  - line-height: 2.5em;
  + line-height: $base-line-height;
  .sv_q_rating_item {
  cursor: pointer;
  @@ -483,7 +485,7 @@ $font-size: 14px;
  }
  .sv_q_rating_item_text {
  display: inline-block;
  - width: 2.5em;
  + width: $base-line-height;
  margin-left: -0.35em;
  border: 1px solid $header-background-color;
  vertical-align: top;
  @@ -509,7 +511,7 @@ $font-size: 14px;
  .sv_nav {
  padding: 1em 0;
  - min-height: 2.5em;
  + min-height: $base-line-height;
  .sv_start_btn,
  .sv_next_btn,
  