+ style .content-full, + mobile style content

src/style/content.scss

@@ -1,7 +1,11 @@
 @import "variables";
 
 .content {
-  margin: $single-margin auto 0;
+  margin: 0 auto;
+
+  &.content_full{
+    width: $content-full;
+  }
 
   &.content_wide{
     width: $content-wide;
@@ -14,4 +18,26 @@
   &.content_thin{
     width: $content-thin;
   }
-}
+}
+
+@media (max-width: $mobile-width) {
+  $content-mobile: 95%;
+
+  .content {
+    &.content_full{
+      width: $content-mobile;
+    }
+
+    &.content_wide{
+      width: $content-mobile;
+    }
+
+    &.content_semi-wide{
+      width: $content-mobile;
+    }
+
+    &.content_thin{
+      width: $content-mobile;
+    }
+  }
+}