chore(colors): adapt to Bootstrap 5.3

_sass/addon/commons.scss

@@ -946,9 +946,44 @@ $btn-mb: 0.5rem;
   }
 } /* #topbar */
 
-#sidebar-trigger,
-#search-trigger {
-  display: none;
+::-webkit-input-placeholder {
+  @include placeholder;
+}
+
+::-moz-placeholder {
+  @include placeholder;
+}
+
+:-ms-input-placeholder {
+  @include placeholder;
+}
+
+::-ms-input-placeholder {
+  @include placeholder;
+}
+
+::placeholder {
+  @include placeholder;
+}
+
+:focus::-webkit-input-placeholder {
+  @include placeholder-focus;
+}
+
+:focus::-moz-placeholder {
+  @include placeholder-focus;
+}
+
+:focus:-ms-input-placeholder {
+  @include placeholder-focus;
+}
+
+:focus::-ms-input-placeholder {
+  @include placeholder-focus;
+}
+
+:focus::placeholder {
+  @include placeholder-focus;
 }
 
 search {
@@ -966,6 +1001,11 @@ search {
   }
 }
 
+#sidebar-trigger,
+#search-trigger {
+  display: none;
+}
+
 /* 'Cancel' link */
 #search-cancel {
   color: var(--link-color);
@@ -985,24 +1025,6 @@ search {
 
   &:focus {
     box-shadow: none;
-
-    &.form-control {
-      &::-moz-placeholder {
-        @include input-placeholder;
-      }
-      &::-webkit-input-placeholder {
-        @include input-placeholder;
-      }
-      &:-ms-input-placeholder {
-        @include input-placeholder;
-      }
-      &::-ms-input-placeholder {
-        @include input-placeholder;
-      }
-      &::placeholder {
-        @include input-placeholder;
-      }
-    }
   }
 }
 

_sass/addon/module.scss

@@ -149,7 +149,11 @@
   padding-right: $val;
 }
 
-@mixin input-placeholder {
+@mixin placeholder {
+  color: var(--text-muted-color) !important;
+}
+
+@mixin placeholder-focus {
   opacity: 0.6;
 }
 

_sass/layout/home.scss

@@ -44,6 +44,7 @@
       .card-title {
         @extend %text-clip;
 
+        color: var(--heading-color) !important;
         font-size: 1.25rem;
       }