Simplifying CSS to make it more uniform between the options

src/index.html

@@ -11,11 +11,11 @@
     <a href="./"><img src="images/sharky_vector_svg.svg" alt="Picture of Sharky, the mascot of skynet" width="145" height="81.56"/> </a>
     <h1>Skynet Password Reset & Sign-up service</h1>
 </div>
-<div id="password" class="boxes">
+<div class="boxes">
 <h2><a href="password.html">Password Reset</a></h2>
 <p>Please use this service if you ever forget your skynet password</p>
 </div>
-<div id="modify" class="boxes">
+<div class="boxes">
 <h2><a href="modify.html">User modification</a></h2>
 <p>
     Please use this service to modify your user data (email, login ssh key, etc.)

src/stylesheets/index.css

@@ -14,15 +14,9 @@ body{
     float: left;
 }
 
-#password {
-    background-color: white;
-}
-
-#modify {
-    background-color: white;
-}
-
 .boxes {
+    display: -moz-flex;
+    background-color: white;
     margin-left: 20%;
     margin-right: 20%;
 }