updated login-/register-logo font size and padding

build/scss/pages/_login_and_register.scss

@@ -4,9 +4,9 @@
 
 .login-logo,
 .register-logo {
-  font-size: 35px;
+  font-size: 2.1rem;
   font-weight: 300;
-  margin-bottom: 25px;
+  margin-bottom: 0.9rem;
   text-align: center;
 
   a {