onboarding backup desktop stylings updates

src/sass/views/onboarding/onboard-tour.scss

@@ -23,6 +23,10 @@
       background-position: top;
     }
   }
+  .cta-button{
+    position: absolute;
+    bottom: 85px;
+  }
 }
 
 @media (max-width: 400px){
@@ -34,3 +38,22 @@
     }
   }
 }
+
+@media (min-width: 1000px){
+  #onboard-tour{
+    p, h2, h3{
+      max-width: 600px;
+    }
+    button{
+      max-width: 400px;
+    }
+    #cta{
+      margin: 2rem 0 0;
+    }
+    &-control{
+      #cta{
+        margin-bottom: 2rem;
+      }
+    }
+  }
+}