Fix scoping on CSS for donate page

Oh right, all these cute overrides should be scoped to the page!

I guess we skipped this because we had pulled this out into a
separate stylesheet. Curiously learning more about how Turbo handles
this kind of thing, like that it doesn't *unload* stylesheets that
*leave* the page when you navigate!

app/assets/stylesheets/fundraising/campaigns/show.css.sass

@@ -13,24 +13,24 @@ body.fundraising-campaigns
   +campaign-progress
   color: $campaign-text-color
 
-a
+  a
     color: $campaign-text-color + #222 !important
 
-#home-link:hover
+  #home-link:hover
     background-color: $campaign-background-color
 
-#userbar, #footer
+  #userbar, #footer
     color: $text-color
     a
       color: $link-color
 
-#home-link
+  #home-link
     color: $link-color
 
-#title
+  #title
     display: none
 
-#donation-form
+  #donation-form
     +module
     background: $campaign-background-color
     border-color: $campaign-border-color
@@ -149,13 +149,13 @@ a
         +awesome-button-color(#004)
         font-size: 120%
 
-#campaign-text[data-campaign-complete]
+  #campaign-text[data-campaign-complete]
     #description
       display: none
       &[data-show]
         display: block
 
-#success-thanks
+  #success-thanks
     border: 1px dashed $module-border-color
     margin-bottom: 1em
     padding: 1em
@@ -164,13 +164,13 @@ a
     p:last-child
       margin-bottom: 0
 
-#success-thanks-toggle-description
+  #success-thanks-toggle-description
     position: absolute
     bottom: 1em
     font-style: italic
     right: 1em
 
-#outfits
+  #outfits
     +outfits-list
     text-align: center
 
@@ -208,20 +208,20 @@ a
           line-height: 1.5
           vertical-align: middle
 
-#last-years-donors
+  #last-years-donors
     font-weight: bold
     margin-top: 1em
     text-align: center
 
-#outfits-header > *
+  #outfits-header > *
     display: inline-block
 
-#all-campaigns-list
+  #all-campaigns-list
     li
       display: inline-block
       list-style: none
       margin-left: 1em
 
-#fine-print
+  #fine-print
     font-size: 85%
     margin-top: 2em