add login button

Views/Login/Login.cshtml

@@ -2,6 +2,7 @@
 
 <form method="post">
     <input type="password" name="passphrase" placeholder="Passphrase" />
+    <button type="submit">Login</button>
 </form>
 
 @section scripts {

wwwroot/css/site.css

@@ -57,7 +57,9 @@ textarea {
     border-width: 0;
 }
 
-body.dark, body.dark input, body.dark textarea {
+body.dark,
+body.dark input,
+body.dark textarea {
     background-color: #222;
     color: #ddd;
 }
@@ -86,12 +88,24 @@ body.dark, body.dark input, body.dark textarea {
     background-color: orangered;
 }
 
-form input[type=password] {
+form input[type=password],
+button {
     display: block;
+    width: 100%;
+    max-width: 300px;
     margin: 20px auto;
     font-size: 20px;
     padding: 8px;
-    border: 1px solid #999;
+    border: 1px solid #fff;
     border-radius: 4px;
+}
+
+form input[type=password] {
     color: #999;
 }
+
+form button {
+    cursor: pointer;
+    color: #fff;
+    background-color: #009E60;
+}