Add slider tabs style

less/_import.less

@@ -35,6 +35,7 @@
 @import "accordion";
 @import "dropdown";
 @import "modal";
+@import "slider";
 @import "offcanvas";
 @import "notification";
 @import "tooltip";

less/slider.less

@@ -0,0 +1,14 @@
+.hook-slider-misc() {
+  .uk-slider-container-tabs:extend(.uk-slider-container) {
+    position: relative;
+
+    &::before {
+      content: "";
+      position: absolute;
+      bottom: 0;
+      left: @tab-margin-horizontal;
+      right: 0;
+      border-bottom: @tab-border-width solid @tab-border;
+    }
+  }
+}

less/tab.less

@@ -23,11 +23,11 @@
 .hook-tab() {
   position: relative;
 
-  &::before {
+  &:not(.uk-slider-items):not(.uk-tab-left):not(.uk-tab-right)::before {
     content: "";
     position: absolute;
     bottom: 0;
-    left: 20px;
+    left: @tab-margin-horizontal;
     right: 0;
     border-bottom: @tab-border-width solid @tab-border;
   }
@@ -42,9 +42,10 @@
   font-weight: 600;
 }
 
-
 .hook-tab-left() {
   &::before {
+    content: "";
+    position: absolute;
     top: 0;
     bottom: 0;
     left: auto;
@@ -62,6 +63,8 @@
 
 .hook-tab-right() {
   &::before {
+    content: "";
+    position: absolute;
     top: 0;
     bottom: 0;
     left: 0;