Added Splash Screens for PWA

resources/views/vendor/mail/html/themes/flightsgoneby.css

@@ -26,6 +26,7 @@ body {
 
 /* Button — outlined so it reads on light or dark backgrounds */
 .button-blue,
+.button,
 .button-primary {
     background-color: transparent;
     border: 2px solid #38bdf8;
@@ -34,7 +35,9 @@ body {
     display: inline-block;
     font-weight: 600;
     padding: 12px 24px;
+    text-align: center;
     text-decoration: none;
+    white-space: nowrap;
 }
 
 /* Footer */