diff --git a/src/assets/font/D-DIN-PRO/D-DIN-PRO-400-Regular.otf b/src/assets/font/D-DIN-PRO/D-DIN-PRO-400-Regular.otf
deleted file mode 100644
index 74dd61a..0000000
Binary files a/src/assets/font/D-DIN-PRO/D-DIN-PRO-400-Regular.otf and /dev/null differ
diff --git a/src/assets/font/D-DIN-PRO/D-DIN-PRO-500-Medium.otf b/src/assets/font/D-DIN-PRO/D-DIN-PRO-500-Medium.otf
deleted file mode 100644
index d72d454..0000000
Binary files a/src/assets/font/D-DIN-PRO/D-DIN-PRO-500-Medium.otf and /dev/null differ
diff --git a/src/assets/font/D-DIN-PRO/D-DIN-PRO-600-SemiBold.otf b/src/assets/font/D-DIN-PRO/D-DIN-PRO-600-SemiBold.otf
deleted file mode 100644
index 5f94c23..0000000
Binary files a/src/assets/font/D-DIN-PRO/D-DIN-PRO-600-SemiBold.otf and /dev/null differ
diff --git a/src/assets/font/Nunito-VariableFont.ttf b/src/assets/font/Nunito-VariableFont.ttf
deleted file mode 100644
index 6bc8144..0000000
Binary files a/src/assets/font/Nunito-VariableFont.ttf and /dev/null differ
diff --git a/src/assets/styles/_common-variables.scss b/src/assets/styles/_common-variables.scss
index d4fd8c7..c78efe1 100644
--- a/src/assets/styles/_common-variables.scss
+++ b/src/assets/styles/_common-variables.scss
@@ -1,4 +1,5 @@
 @use 'sass:meta';
+@use 'sass:map';
 
 body {
     --iqser-primary: lightblue;
@@ -45,10 +46,22 @@ body {
     --iqser-button-radius: 17px;
     --iqser-button-font-size: 13px;
     --iqser-button-height: 34px;
-    --iqser-font-family: Inter, sans-serif;
+    --iqser-font-family: 'some placeholder value that should be overridden when configuring a theme';
+}
+
+$required-variables: 'iqser-font-family' 'iqser-primary';
+
+@mixin checkRequiredVariables($args, $theme) {
+    @each $var in $required-variables {
+        @if map.get(meta.keywords($args), $var) == null {
+            @error "Missing #{$var} in #{$theme} theme";
+        }
+    }
 }
 
 @mixin configureLight($args...) {
+    @include checkRequiredVariables($args, 'light');
+
     body.light {
         @each $name, $value in meta.keywords($args) {
             --#{$name}: #{$value};
@@ -57,6 +70,8 @@ body {
 }
 
 @mixin configureDark($args...) {
+    @include checkRequiredVariables($args, 'dark');
+
     body.dark {
         @each $name, $value in meta.keywords($args) {
             --#{$name}: #{$value};
diff --git a/src/assets/styles/common-fonts.scss b/src/assets/styles/common-fonts.scss
index fdeec5a..1946f70 100644
--- a/src/assets/styles/common-fonts.scss
+++ b/src/assets/styles/common-fonts.scss
@@ -32,51 +32,3 @@
     font-weight: 700;
     src: url('../font/Inter-VariableFont.ttf') format('truetype');
 }
-
-@font-face {
-    font-family: 'Nunito';
-    font-weight: 300;
-    src: url('../font/Nunito-VariableFont.ttf') format('truetype');
-}
-
-@font-face {
-    font-family: 'Nunito';
-    font-weight: 400;
-    src: url('../font/Nunito-VariableFont.ttf') format('truetype');
-}
-
-@font-face {
-    font-family: 'Nunito';
-    font-weight: 500;
-    src: url('../font/Nunito-VariableFont.ttf') format('truetype');
-}
-
-@font-face {
-    font-family: 'Nunito';
-    font-weight: 600;
-    src: url('../font/Nunito-VariableFont.ttf') format('truetype');
-}
-
-@font-face {
-    font-family: 'Nunito';
-    font-weight: 700;
-    src: url('../font/Nunito-VariableFont.ttf') format('truetype');
-}
-
-@font-face {
-    font-family: 'D-DIN-PRO';
-    font-weight: 400;
-    src: url('../font/D-DIN-PRO/D-DIN-PRO-400-Regular.otf') format('opentype');
-}
-
-@font-face {
-    font-family: 'D-DIN-PRO';
-    font-weight: 500;
-    src: url('../font/D-DIN-PRO/D-DIN-PRO-500-Medium.otf') format('opentype');
-}
-
-@font-face {
-    font-family: 'D-DIN-PRO';
-    font-weight: 600;
-    src: url('../font/D-DIN-PRO/D-DIN-PRO-600-SemiBold.otf') format('opentype');
-}
diff --git a/src/lib/filtering/filter-card/filter-card.component.ts b/src/lib/filtering/filter-card/filter-card.component.ts
index 4d265b8..2bf216a 100644
--- a/src/lib/filtering/filter-card/filter-card.component.ts
+++ b/src/lib/filtering/filter-card/filter-card.component.ts
@@ -24,6 +24,7 @@ const atLeastOneIsExpandable = pipe(
     styleUrls: ['./filter-card.component.scss'],
     changeDetection: ChangeDetectionStrategy.OnPush,
     providers: [
+        SearchService,
         {
             provide: MAT_CHECKBOX_DEFAULT_OPTIONS,
             useValue: {