Добавил формы в линию, поправил существующие

src/blocks/field-checkbox/field-checkbox.less

@@ -7,7 +7,7 @@
 
   &__title {
     font-weight: 700;
-    line-height: 1.2em;
+    line-height: @line-height;
     display: block;
     margin-bottom: round(@line-height / 4, 2);
     min-height: 1px;

src/blocks/field-radio/field-radio.less

@@ -7,7 +7,7 @@
 
   &__title {
     font-weight: 700;
-    line-height: 1.2em;
+    line-height: @line-height;
     display: block;
     margin-bottom: round(@line-height / 4, 2);
     min-height: 1px;

src/blocks/field-range/field-range.less

@@ -9,6 +9,7 @@
     font-weight: 700;
     display: block;
     margin-bottom: round(@line-height / 4, 2);
+    line-height: @line-height;
   }
 
   &__input-wrap {

src/blocks/field-select/field-select.less

@@ -19,6 +19,7 @@
     background-repeat: no-repeat;
     background-position: right 0.3em center;
     background-size: 1.063em 0.688em;
+    padding-right: 1.8em;
 
     &[multiple] {
       background-image: none;

src/blocks/field-text/field-text.less

@@ -9,6 +9,7 @@
     font-weight: 700;
     display: block;
     margin-bottom: round(@line-height / 4, 2);
+    line-height: @line-height;
   }
 
   &__input-wrap {}

src/blocks/field-toggler/field-toggler.less

@@ -7,7 +7,7 @@
 
   &__title {
     font-weight: 700;
-    line-height: 1.2em;
+    line-height: @line-height;
     display: block;
     margin-bottom: round(@line-height / 4, 2);
     min-height: 1px;

src/blocks/form/form--line.less

+@import '../../less/variables.less';     // только для удобства обращения к переменным
+
+
+.form {
+
+  &--line {
+    &:not(:last-child) {
+      margin-bottom: 0;
+    }
+
+    @media (min-width: @screen-sm) {
+
+      .field-text,
+      .field-checkbox,
+      .field-radio,
+      .field-select,
+      .field-file,
+      .field-range,
+      .field-toggler,
+      .field-actions {
+        display: inline-block;
+        vertical-align: top;
+        margin-top: 0;
+        margin-right: 0.3em;
+      }
+
+      .field-text__input-wrap,
+      .field-checkbox__input-wrap,
+      .field-radio__input-wrap,
+      .field-select__select-wrap,
+      .field-toggler__input-wrap,
+      .field-file__input-wrap {
+        display: inline-block;
+        vertical-align: top;
+      }
+
+      .field-file__input-wrap {
+        max-width: 35rem;
+      }
+
+      .field-text__name,
+      .field-checkbox__title,
+      .field-radio__title,
+      .field-select__name,
+      .field-file__name,
+      .field-range__name,
+      .field-toggler__title {
+        display: inline-block;
+        vertical-align: top;
+        margin: 0;
+        max-width: 20rem;
+        white-space: nowrap;
+        overflow: hidden;
+        text-overflow: ellipsis;
+        padding-top: e("calc(@{field-padding-top} + 1px)"); // 1px — бордюр инпута
+      }
+
+      .field-checkbox__title,
+      .field-radio__title,
+      .field-toggler__title {
+        margin-right: 0.3em;
+      }
+
+      .field-checkbox__name,
+      .field-radio__name,
+      .field-toggler__name {
+        margin-right: 0.6em;
+        margin-top: e("calc(@{field-padding-top} + 1px)");
+        margin-bottom: e("calc(@{field-padding-top} + 1px)");
+      }
+
+    }
+
+  }
+}
+

src/blocks/form/form.less

@@ -12,4 +12,5 @@
       margin-bottom: @line-height;
     }
   }
+
 }

src/less/style.less

@@ -46,6 +46,7 @@
 @import './src/blocks/field-actions/field-actions.less';
 @import './src/blocks/form/form.less';
 @import './src/blocks/form/form--horizontal.less';
+@import './src/blocks/form/form--line.less';
 @import './src/blocks/thumb/thumb.less';
 @import './src/blocks/sprite-svg--localstorage/sprite-svg--localstorage.less';
 @import './src/blocks/field-toggler/field-toggler.less';