Updated styles for the Google Auth button (GRN-31) (#296)

* Greenlight landing page layout adjustments, general cleanup and responsive styles

* Text update Signup to Sign up

* Updated Google Sign in and Sign up styles

* no changes were made to sample env but needed to commit it

* minor padding update on the Google icon

* deleted Google Auth secrets from the sameple.env

* updated the if condition in new.html.erb

* <changed logic of button display>

* Update _login_modal.html.erb

app/assets/stylesheets/main.scss

@@ -57,3 +57,41 @@
 .display-4 {
   font-weight: normal;
 }
+
+
+.customBtn-google {
+  display: inline-block;
+  background: #4688F1;
+  color: #ffffff;
+  box-shadow: 0 2px 4px 0 rgba(0,0,0,.25);
+  -webkit-transition: background-color .218s,border-color .218s,box-shadow .218s;
+  transition: background-color .218s,border-color .218s,box-shadow .218s;
+  white-space: nowrap;
+  border-radius: 2px;
+  border: 1px solid transparent;
+  &:hover {
+    cursor: pointer;
+    color: #ffffff;
+    -webkit-box-shadow: 0 0 3px 3px rgba(66,133,244,.3);
+    box-shadow: 0 0 3px 3px rgba(66,133,244,.3);
+  }
+
+  .customBtn-icon {
+    display: inline-block;
+    vertical-align: middle;
+    padding:13px 15px 13px 15px;
+    float:left;
+    background: #ffffff;
+  }
+
+  .customBtn-text {
+    font-size: 16px;
+    line-height: 48px;
+    font-weight: 600;
+    letter-spacing: .21px;
+    padding:0 25px;
+    font-family: 'Roboto', sans-serif;
+  }
+
+
+}