Improved upload dialog

assets/sass/style.sass

@@ -55,18 +55,27 @@ nav
 
 .container.centered
   flex-grow: 1
-  align-items: center
-  justify-content: center
   display: flex
-  margin-bottom: 64px
+  margin: 0 auto 64px auto
+  padding: 0 16px
+  flex-direction: column
+  justify-content: center
+  width: 100%
+  max-width: 640px
+
+.info
+  padding: 16px
+  margin: 16px 0
+  box-shadow: 0 2px 4px rgba(33,33,33,0.2)
+  text-decoration: none
+  border-radius: 2px
 
 form.upload
-  padding: 96px 128px
-  margin: 48px 24px
+  padding: 96px 0
   box-shadow: 0 2px 4px rgba(33,33,33,0.2)
   text-decoration: none
-  background: #ffffff
   border-radius: 2px
+  text-align: center
 
 .images
   display: flex