diff --git a/projects/addon-mobile/styles/tinkoff-ui-angular-mobile.less b/projects/addon-mobile/styles/tinkoff-ui-angular-mobile.less
index 8bffcae159c9..dbaad8582247 100644
--- a/projects/addon-mobile/styles/tinkoff-ui-angular-mobile.less
+++ b/projects/addon-mobile/styles/tinkoff-ui-angular-mobile.less
@@ -1,12 +1,12 @@
-@import '../../core/styles/basic/normalize';
-@import '../../core/styles/basic/main';
-@import '../../core/styles/themes/theme-default-vars';
-@import '../../core/styles/markup/tui-island';
-@import '../../core/styles/markup/tui-palette';
-@import '../../core/styles/markup/tui-space';
-@import '../../core/styles/themes/wrapper/textfield';
-@import '../../core/styles/themes/wrapper/table';
-@import '../../core/styles/themes/wrapper/primary';
-@import '../../core/styles/themes/wrapper/secondary';
-@import '../../core/styles/themes/wrapper/whiteblock';
-@import '../../core/styles/themes/wrapper/outline';
+@import '../../core/styles/basic/normalize.less';
+@import '../../core/styles/basic/main.less';
+@import '../../core/styles/themes/theme-default-vars.less';
+@import '../../core/styles/markup/tui-island.less';
+@import '../../core/styles/markup/tui-palette.less';
+@import '../../core/styles/markup/tui-space.less';
+@import '../../core/styles/themes/wrapper/textfield.less';
+@import '../../core/styles/themes/wrapper/table.less';
+@import '../../core/styles/themes/wrapper/primary.less';
+@import '../../core/styles/themes/wrapper/secondary.less';
+@import '../../core/styles/themes/wrapper/whiteblock.less';
+@import '../../core/styles/themes/wrapper/outline.less';
diff --git a/projects/core/components/button/button.style.less b/projects/core/components/button/button.style.less
index 1ac16435f46b..d20782db735a 100644
--- a/projects/core/components/button/button.style.less
+++ b/projects/core/components/button/button.style.less
@@ -1,4 +1,4 @@
-@import '../../styles/basic/basic-imports';
+@import '../../styles/basic/basic-imports.less';
 
 @padding-xs: 8px;
 @padding-s: 12px;
diff --git a/projects/core/components/data-list/data-list.style.less b/projects/core/components/data-list/data-list.style.less
index c9ff67344fd5..3cf483da7e9c 100644
--- a/projects/core/components/data-list/data-list.style.less
+++ b/projects/core/components/data-list/data-list.style.less
@@ -1,4 +1,4 @@
-@import '../../styles/basic/basic-imports';
+@import '../../styles/basic/basic-imports.less';
 
 tui-data-list {
     .text-body-m();
diff --git a/projects/core/components/data-list/option/option.style.less b/projects/core/components/data-list/option/option.style.less
index 1101ffecf702..9c5462060f04 100644
--- a/projects/core/components/data-list/option/option.style.less
+++ b/projects/core/components/data-list/option/option.style.less
@@ -1,4 +1,4 @@
-@import '../../../styles/basic/basic-imports';
+@import '../../../styles/basic/basic-imports.less';
 
 :host {
     .clearbtn();
diff --git a/projects/core/components/dialog/dialog.style.less b/projects/core/components/dialog/dialog.style.less
index 10f46faafac7..bca626aeaf70 100644
--- a/projects/core/components/dialog/dialog.style.less
+++ b/projects/core/components/dialog/dialog.style.less
@@ -1,4 +1,4 @@
-@import '../../styles/basic/basic-imports';
+@import '../../styles/basic/basic-imports.less';
 
 :host {
     .text-body-m();
diff --git a/projects/core/components/dropdown-box/dropdown-box.style.less b/projects/core/components/dropdown-box/dropdown-box.style.less
index f64e72619d65..4f36428b0d61 100644
--- a/projects/core/components/dropdown-box/dropdown-box.style.less
+++ b/projects/core/components/dropdown-box/dropdown-box.style.less
@@ -1,4 +1,4 @@
-@import '../../styles/basic/basic-imports';
+@import '../../styles/basic/basic-imports.less';
 
 :host {
     .createStackingContext();
diff --git a/projects/core/components/error/error.style.less b/projects/core/components/error/error.style.less
index 80ab80aa354f..18d5578fce9e 100644
--- a/projects/core/components/error/error.style.less
+++ b/projects/core/components/error/error.style.less
@@ -1,4 +1,4 @@
-@import '../../styles/basic/basic-imports';
+@import '../../styles/basic/basic-imports.less';
 
 :host {
     .text-basic();
diff --git a/projects/core/components/expand/expand.style.less b/projects/core/components/expand/expand.style.less
index 7b8d3f0858be..f52597b170f0 100644
--- a/projects/core/components/expand/expand.style.less
+++ b/projects/core/components/expand/expand.style.less
@@ -1,4 +1,4 @@
-@import '../../styles/basic/basic-imports';
+@import '../../styles/basic/basic-imports.less';
 
 :host {
     display: block;
diff --git a/projects/core/components/hints-host/hint-box/hint-box.style.less b/projects/core/components/hints-host/hint-box/hint-box.style.less
index b84e96d818a2..ddc020f79eb4 100644
--- a/projects/core/components/hints-host/hint-box/hint-box.style.less
+++ b/projects/core/components/hints-host/hint-box/hint-box.style.less
@@ -1,4 +1,4 @@
-@import '../../../styles/basic/basic-imports';
+@import '../../../styles/basic/basic-imports.less';
 
 @arrowSize: 8px;
 @arrowOffset: 14px;
diff --git a/projects/core/components/hints-host/hints-host.style.less b/projects/core/components/hints-host/hints-host.style.less
index 1d1dcb046898..d60dc51a63f8 100644
--- a/projects/core/components/hints-host/hints-host.style.less
+++ b/projects/core/components/hints-host/hints-host.style.less
@@ -1,4 +1,4 @@
-@import '../../styles/basic/basic-imports';
+@import '../../styles/basic/basic-imports.less';
 
 :host {
     position: fixed;
diff --git a/projects/core/components/label/label.style.less b/projects/core/components/label/label.style.less
index 1dc51e400e25..c870db1a6832 100644
--- a/projects/core/components/label/label.style.less
+++ b/projects/core/components/label/label.style.less
@@ -1,4 +1,4 @@
-@import '../../styles/basic/basic-imports';
+@import '../../styles/basic/basic-imports.less';
 
 :host {
     display: flex;
diff --git a/projects/core/components/link/link.style.less b/projects/core/components/link/link.style.less
index c831021a62dc..9b99ef6724c0 100644
--- a/projects/core/components/link/link.style.less
+++ b/projects/core/components/link/link.style.less
@@ -1,4 +1,4 @@
-@import '../../styles/basic/basic-imports';
+@import '../../styles/basic/basic-imports.less';
 
 :host {
     .clearbtn();
diff --git a/projects/core/components/loader/loader.style.less b/projects/core/components/loader/loader.style.less
index 7effcdeab17b..f0ecfb4f55f8 100644
--- a/projects/core/components/loader/loader.style.less
+++ b/projects/core/components/loader/loader.style.less
@@ -1,4 +1,4 @@
-@import '../../styles/basic/basic-imports';
+@import '../../styles/basic/basic-imports.less';
 
 @size-xs: 12px;
 @size-s: 16px;
diff --git a/projects/core/components/notification/notification.style.less b/projects/core/components/notification/notification.style.less
index 1889b11cfbf3..1af48f08e811 100644
--- a/projects/core/components/notification/notification.style.less
+++ b/projects/core/components/notification/notification.style.less
@@ -1,4 +1,4 @@
-@import '../../styles/basic/basic-imports';
+@import '../../styles/basic/basic-imports.less';
 
 :host {
     .text-basic();
diff --git a/projects/core/components/primitive-calendar/primitive-calendar.style.less b/projects/core/components/primitive-calendar/primitive-calendar.style.less
index df4548069930..9bd4e1f4c82e 100644
--- a/projects/core/components/primitive-calendar/primitive-calendar.style.less
+++ b/projects/core/components/primitive-calendar/primitive-calendar.style.less
@@ -1,4 +1,4 @@
-@import '../../styles/basic/basic-imports';
+@import '../../styles/basic/basic-imports.less';
 
 @itemSize: 36px;
 
diff --git a/projects/core/components/primitive-checkbox/primitive-checkbox.style.less b/projects/core/components/primitive-checkbox/primitive-checkbox.style.less
index ec3f64dfc578..1a03885ce508 100644
--- a/projects/core/components/primitive-checkbox/primitive-checkbox.style.less
+++ b/projects/core/components/primitive-checkbox/primitive-checkbox.style.less
@@ -1,4 +1,4 @@
-@import '../../styles/basic/basic-imports';
+@import '../../styles/basic/basic-imports.less';
 
 @sizeM: 16px;
 @sizeL: 24px;
diff --git a/projects/core/components/primitive-spin-button/primitive-spin-button.style.less b/projects/core/components/primitive-spin-button/primitive-spin-button.style.less
index c483d1f0820d..4aee18eefcee 100644
--- a/projects/core/components/primitive-spin-button/primitive-spin-button.style.less
+++ b/projects/core/components/primitive-spin-button/primitive-spin-button.style.less
@@ -1,4 +1,4 @@
-@import '../../styles/basic/basic-imports';
+@import '../../styles/basic/basic-imports.less';
 
 :host {
     .text-body-l();
diff --git a/projects/core/components/primitive-textfield/primitive-textfield.style.less b/projects/core/components/primitive-textfield/primitive-textfield.style.less
index 19591af314cc..2dcaf721eac7 100644
--- a/projects/core/components/primitive-textfield/primitive-textfield.style.less
+++ b/projects/core/components/primitive-textfield/primitive-textfield.style.less
@@ -1,4 +1,4 @@
-@import '../../styles/basic/basic-imports';
+@import '../../styles/basic/basic-imports.less';
 
 .textfield();
 
diff --git a/projects/core/components/primitive-year-picker/primitive-year-picker.style.less b/projects/core/components/primitive-year-picker/primitive-year-picker.style.less
index 5123514a4f68..0ecf6329d8e7 100644
--- a/projects/core/components/primitive-year-picker/primitive-year-picker.style.less
+++ b/projects/core/components/primitive-year-picker/primitive-year-picker.style.less
@@ -1,4 +1,4 @@
-@import '../../styles/basic/basic-imports';
+@import '../../styles/basic/basic-imports.less';
 
 @itemSize: 63px;
 
diff --git a/projects/core/components/root/root.style.less b/projects/core/components/root/root.style.less
index 692ca1a64a79..6b6155814459 100644
--- a/projects/core/components/root/root.style.less
+++ b/projects/core/components/root/root.style.less
@@ -1,4 +1,4 @@
-@import '../../styles/mixins/mixins';
+@import '../../styles/mixins/mixins.less';
 
 :host {
     position: relative;
diff --git a/projects/core/components/scroll-controls/scroll-controls.style.less b/projects/core/components/scroll-controls/scroll-controls.style.less
index f7bfeddbd3f8..65c069ba2ab0 100644
--- a/projects/core/components/scroll-controls/scroll-controls.style.less
+++ b/projects/core/components/scroll-controls/scroll-controls.style.less
@@ -1,4 +1,4 @@
-@import '../../styles/basic/basic-imports';
+@import '../../styles/basic/basic-imports.less';
 
 @scroll-width: 12px;
 @scroll-width-large: 14px;
diff --git a/projects/core/components/scrollbar/scrollbar.style.less b/projects/core/components/scrollbar/scrollbar.style.less
index 08b7b2b4ccbb..6712993df9b6 100644
--- a/projects/core/components/scrollbar/scrollbar.style.less
+++ b/projects/core/components/scrollbar/scrollbar.style.less
@@ -1,4 +1,4 @@
-@import '../../styles/basic/basic-imports';
+@import '../../styles/basic/basic-imports.less';
 
 :host {
     position: relative;
diff --git a/projects/core/components/tooltip/tooltip.style.less b/projects/core/components/tooltip/tooltip.style.less
index 24fca9122dc2..0d27695de678 100644
--- a/projects/core/components/tooltip/tooltip.style.less
+++ b/projects/core/components/tooltip/tooltip.style.less
@@ -1,4 +1,4 @@
-@import '../../styles/basic/basic-imports';
+@import '../../styles/basic/basic-imports.less';
 
 :host {
     .transition(color);
diff --git a/projects/core/components/wrapper/wrapper.style.less b/projects/core/components/wrapper/wrapper.style.less
index 125cbbdaf38c..4d83d577c7c9 100644
--- a/projects/core/components/wrapper/wrapper.style.less
+++ b/projects/core/components/wrapper/wrapper.style.less
@@ -1,4 +1,4 @@
-@import '../../styles/basic/basic-imports';
+@import '../../styles/basic/basic-imports.less';
 
 :host {
     .transition(~'color, background');
diff --git a/projects/core/modules/notifications/notification-alert/notification-alert.style.less b/projects/core/modules/notifications/notification-alert/notification-alert.style.less
index aea2192b91c0..4a0c38fbac01 100644
--- a/projects/core/modules/notifications/notification-alert/notification-alert.style.less
+++ b/projects/core/modules/notifications/notification-alert/notification-alert.style.less
@@ -1,4 +1,4 @@
-@import '../../../styles/basic/basic-imports';
+@import '../../../styles/basic/basic-imports.less';
 
 :host {
     .shadow(2);
diff --git a/projects/core/modules/notifications/notifications-host/notifications-host.style.less b/projects/core/modules/notifications/notifications-host/notifications-host.style.less
index dc5b6678d07b..3c6da0a04b9a 100644
--- a/projects/core/modules/notifications/notifications-host/notifications-host.style.less
+++ b/projects/core/modules/notifications/notifications-host/notifications-host.style.less
@@ -1,4 +1,4 @@
-@import '../../../styles/basic/basic-imports';
+@import '../../../styles/basic/basic-imports.less';
 
 :host {
     position: fixed;
diff --git a/projects/core/styles/basic/basic-imports.less b/projects/core/styles/basic/basic-imports.less
index 47a422c2b39b..07e01845b01a 100644
--- a/projects/core/styles/basic/basic-imports.less
+++ b/projects/core/styles/basic/basic-imports.less
@@ -1,6 +1,6 @@
-@import '../mixins/mixins';
-@import '../mixins/picker';
-@import '../mixins/text';
-@import '../mixins/textfield';
-@import '../variables/sizes';
-@import '../variables/media';
+@import '../mixins/mixins.less';
+@import '../mixins/picker.less';
+@import '../mixins/text.less';
+@import '../mixins/textfield.less';
+@import '../variables/sizes.less';
+@import '../variables/media.less';
diff --git a/projects/core/styles/taiga-ui-global.less b/projects/core/styles/taiga-ui-global.less
index a140de964c94..67c9bdd6bbb3 100644
--- a/projects/core/styles/taiga-ui-global.less
+++ b/projects/core/styles/taiga-ui-global.less
@@ -1,19 +1,19 @@
-@import './basic/basic-imports';
-@import './basic/keyframes';
-@import './basic/normalize';
-@import './basic/main';
-@import './markup/tui-autofill';
-@import './markup/tui-container';
-@import './markup/tui-form';
-@import './markup/tui-group';
-@import './markup/tui-island';
-@import './markup/tui-list';
-@import './markup/tui-menu-link';
-@import './markup/tui-mobile-only';
-@import './markup/tui-palette';
-@import './markup/tui-required';
-@import './markup/tui-row';
-@import './markup/tui-skeleton';
-@import './markup/tui-space';
-@import './markup/tui-table';
-@import './markup/tui-text';
+@import './basic/basic-imports.less';
+@import './basic/keyframes.less';
+@import './basic/normalize.less';
+@import './basic/main.less';
+@import './markup/tui-autofill.less';
+@import './markup/tui-container.less';
+@import './markup/tui-form.less';
+@import './markup/tui-group.less';
+@import './markup/tui-island.less';
+@import './markup/tui-list.less';
+@import './markup/tui-menu-link.less';
+@import './markup/tui-mobile-only.less';
+@import './markup/tui-palette.less';
+@import './markup/tui-required.less';
+@import './markup/tui-row.less';
+@import './markup/tui-skeleton.less';
+@import './markup/tui-space.less';
+@import './markup/tui-table.less';
+@import './markup/tui-text.less';
diff --git a/projects/core/styles/taiga-ui-local.less b/projects/core/styles/taiga-ui-local.less
index 8e78b4f8f9dc..5a2cd1629424 100644
--- a/projects/core/styles/taiga-ui-local.less
+++ b/projects/core/styles/taiga-ui-local.less
@@ -1,2 +1,2 @@
 //Have to reimport this: https://github.com/angular/angular-cli/issues/7245
-@import './basic/basic-imports';
+@import './basic/basic-imports.less';
diff --git a/projects/core/styles/taiga-ui-theme.less b/projects/core/styles/taiga-ui-theme.less
index 3f32e7beae95..8a319bb24dbe 100644
--- a/projects/core/styles/taiga-ui-theme.less
+++ b/projects/core/styles/taiga-ui-theme.less
@@ -1,4 +1,4 @@
 @import './theme/fonts.css';
-@import './taiga-ui-local';
-@import './theme/variables';
-@import './theme/wrapper';
+@import './taiga-ui-local.less';
+@import './theme/variables.less';
+@import './theme/wrapper.less';
diff --git a/projects/core/styles/theme/wrapper.less b/projects/core/styles/theme/wrapper.less
index 7f7165fa63b7..78f0382e72af 100644
--- a/projects/core/styles/theme/wrapper.less
+++ b/projects/core/styles/theme/wrapper.less
@@ -1,7 +1,7 @@
-@import './wrapper/icon';
-@import './wrapper/outline';
-@import './wrapper/primary';
-@import './wrapper/secondary';
-@import './wrapper/table';
-@import './wrapper/textfield';
-@import './wrapper/whiteblock';
+@import './wrapper/icon.less';
+@import './wrapper/outline.less';
+@import './wrapper/primary.less';
+@import './wrapper/secondary.less';
+@import './wrapper/table.less';
+@import './wrapper/textfield.less';
+@import './wrapper/whiteblock.less';