ENGCOM-5594: Fixes less compilation problems in the Magento/blank theme #24001

 - Merge Pull Request #24001 from hostep/magento2:fix-for-issue-23619-blank-theme
 - Merged commits:
   1. cbcb8c6
   2. ed98703
   3. beeb56c
   4. d8c86b3
   5. 937b2c0

Author: magento-engcom-team

app/design/adminhtml/Magento/backend/web/css/source/components/_modals_extend.less

@@ -33,6 +33,10 @@
 
 //
 
+.modals-overlay {
+    &:extend(.abs-modal-overlay all);
+}
+
 .modal-popup,
 .modal-slide {
     .action-close {

app/design/frontend/Magento/blank/Magento_AdvancedCheckout/web/css/source/_module.less

@@ -53,12 +53,6 @@
             }
 
             .block-content {
-                &:extend(.abs-add-clearfix-desktop all);
-
-                .box {
-                    &:extend(.abs-blocks-2columns all);
-                }
-
                 .actions-toolbar {
                     clear: both;
                     .lib-actions-toolbar(
@@ -167,4 +161,16 @@
             &:extend(.abs-add-clearfix-desktop all);
         }
     }
+
+    .column {
+        .block-addbysku {
+            .block-content {
+                &:extend(.abs-add-clearfix-desktop all);
+
+                .box {
+                    &:extend(.abs-blocks-2columns all);
+                }
+            }
+        }
+    }
 }

app/design/frontend/Magento/blank/Magento_Checkout/web/css/source/module/checkout/_estimated-total.less

@@ -15,7 +15,6 @@
 
     .opc-estimated-wrapper {
         &:extend(.abs-add-clearfix all);
-        &:extend(.abs-no-display-desktop all);
         .lib-css(border-bottom, @border-width__base solid @color-gray80);
         margin: 0 0 15px;
         padding: 18px 15px;
@@ -37,7 +36,7 @@
                     &:before {
                         .lib-css(color, @button__color);
                     }
-                    
+
                     &:hover:before {
                         .lib-css(color, @button__hover__color);
                     }
@@ -53,6 +52,6 @@
 
 .media-width(@extremum, @break) when (@extremum = 'min') and (@break = @screen__m) {
     .opc-estimated-wrapper {
-        display: none;
+        &:extend(.abs-no-display-desktop all);
     }
 }

app/design/frontend/Magento/blank/Magento_GiftMessage/web/css/source/_module.less

@@ -18,7 +18,6 @@
 & when (@media-common = true) {
     .gift-message {
         .field {
-            &:extend(.abs-clearfix all);
             margin-bottom: @indent__base;
 
             .label {

app/design/frontend/Magento/blank/web/css/source/_extends.less

@@ -179,7 +179,7 @@
 & when (@media-common = true) {
     .abs-block-title {
         margin-bottom: 15px;
-        
+
         > strong {
             .lib-heading(h3);
         }
@@ -194,7 +194,7 @@
     .abs-account-blocks {
         .block-title {
             &:extend(.abs-block-title all);
-            
+
             > .action {
                 margin-left: 15px;
             }
@@ -849,6 +849,51 @@
     }
 }
 
+//
+//  Account pages: title
+//  ---------------------------------------------
+
+& when (@media-common = true) {
+    .abs-account-title {
+        > strong,
+        > span {
+            .lib-font-size(22);
+            .lib-css(font-weight, @font-weight__light);
+        }
+
+        .lib-css(border-bottom, 1px solid @border-color__base);
+        .lib-css(margin-bottom, @indent__m);
+        .lib-css(padding-bottom, @indent__s);
+    }
+}
+
+//
+//  Ratings: vertical alignment
+//  ---------------------------------------------
+
+& when (@media-common = true) {
+    .abs-rating-summary {
+        .rating {
+            &-summary {
+                display: table-row;
+            }
+
+            &-label {
+                display: table-cell;
+                padding-bottom: @indent__xs;
+                padding-right: @indent__m;
+                padding-top: 1px;
+                vertical-align: top;
+            }
+
+            &-result {
+                display: table-cell;
+                vertical-align: top;
+            }
+        }
+    }
+}
+
 //
 //  Add colon
 //  ---------------------------------------------

app/design/frontend/Magento/luma/web/css/source/_extends.less

@@ -1212,7 +1212,7 @@
 }
 
 //
-//  Forms: margin-bottom for small forms
+//  Ratings: vertical alignment
 //  ---------------------------------------------
 
 & when (@media-common = true) {

lib/web/css/source/components/_modals.less

@@ -150,7 +150,6 @@
 
     //  Modals overlay
     .modals-overlay {
-        &:extend(.abs-modal-overlay all);
         .lib-css(z-index, @overlay__z-index);
     }