Updated the flex styles to bias to auto size, rather than 0 size. Since the bias is only used by IE (though part of the standard), this was causing a break in IE but "worked" in current versions of other browsers...for now.

src/style/main.css

@@ -1,3 +1,9 @@
+/* Partial reset */
+p, div {
+	display: block;
+}
+
+/* Main styles */
 html {
   height: 100%;
 }
@@ -66,7 +72,7 @@ div.modalTerminal p {
 html,
 body,
 .box {
-  display: flexbox;
+  display: flex;
   display: -moz-box;
   display: -webkit-box;
   display: -ms-flexbox;
@@ -76,29 +82,29 @@ body,
 .flex1 {
   -webkit-box-flex: 1;
   -moz-box-flex: 1;
-  -ms-flex: 1.0;
+  -ms-flex: 1.0 1.0 auto;
-  flex: 1;
+  flex: 1 1 auto;
 }
 
 .flex2 {
   -webkit-box-flex: 2;
   -moz-box-flex: 2;
-  -ms-flex: 2.0;
+  -ms-flex: 2.0 2.0 auto;
-  flex: 2;
+  flex: 2 2 auto;
 }
 
 .flex3 {
   -webkit-box-flex: 3;
   -moz-box-flex: 3;
-  -ms-flex: 3.0;
+  -ms-flex: 3.0 3.0 auto;
-  flex: 3;
+  flex: 3 3 auto;
 }
 
 .flex10 {
   -webkit-box-flex: 10;
   -moz-box-flex: 10;
-  -ms-flex: 10.0;
+  -ms-flex: 10.0 10.0 auto;
-  flex: 10;
+  flex: 10 10 auto;
 }
 
 html,