Prevent page zoom on input focus in iOS 10. fixes flarum/core#1023

framework/core/less/forum/Composer.less

@@ -194,15 +194,10 @@
         }
       }
     }
-    h3 {
-      &, a, input {
-        font-size: 14px;
-      }
-      input {
+    h3 input {
       width: 100% !important;
     }
   }
-  }
   .ComposerBody-editor {
     padding: 15px;
   }
@@ -331,8 +326,7 @@
 // ------------------------------------
 // Text Editor
 
-.TextEditor {
-  & textarea {
+.TextEditor textarea {
   border-radius: 0;
   padding: 0 0 10px;
   border: 0;
@@ -345,6 +339,9 @@
     background: none;
     border: 0;
   }
+
+  @media @phone {
+    font-size: 16px; // minimum font-size required to prevent page zoom on focus in iOS 10
   }
 }
 .TextEditor-controls {

framework/core/less/lib/Form.less

@@ -18,6 +18,10 @@
     height: 50px;
     padding: 15px 20px;
     font-size: 15px;
+
+    @media @phone {
+      font-size: 16px; // minimum font-size required to prevent page zoom on focus in iOS 10
+    }
   }
 
   .Form-group {

framework/core/less/lib/FormControl.less

@@ -38,6 +38,10 @@
   textarea& {
     height: auto;
   }
+
+  @media @phone {
+    font-size: 16px; // minimum font-size required to prevent page zoom on focus in iOS 10
+  }
 }
 .helpText {
   font-size: 12px;