Turn clouds on landing page into SVGs, use SCSS variables to color them (#4299)

app/javascript/styles/about.scss

@@ -386,7 +386,7 @@
         top: 0;
         left: 0;
 
-        img {
+        div {
           position: absolute;
           transition: all 0.1s linear;
           animation-name: floating;
@@ -398,23 +398,29 @@
         }
 
         .float-1 {
+          width: 324px;
           height: 170px;
           right: -120px;
           bottom: 0;
+          background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 447.1875 234.375" height="170" width="324"><path fill="#{hex-color(lighten($ui-base-color, 26%))}" d="M21.69 233.366c-6.45-1.268-13.347-5.63-16.704-10.564-10.705-15.734-1.513-37.724 18.632-44.57l4.8-1.632.173-17.753c.146-14.77.515-19.063 2.2-25.55 6.736-25.944 24.46-46.032 47.766-54.137 11.913-4.143 19.558-5.366 34.178-5.47l13.828-.096V71.12c0-4.755 2.853-17.457 5.238-23.327 8.588-21.137 26.735-35.957 52.153-42.593 23.248-6.07 50.153-6.415 71.863-.923 11.14 2.82 25.686 9.957 33.857 16.615 19.335 15.756 31.82 41.05 35.183 71.275.59 5.305.672 5.435 3.11 4.926 11.833-2.474 30.4-3.132 40.065-1.42 24.388 4.32 40.568 19.076 47.214 43.058 2.16 7.8 3.953 23.894 3.59 32.237l-.24 5.498 5.156 1.317c6.392 1.633 14.55 7.098 18.003 12.062 1.435 2.062 3.305 6.597 4.156 10.078 1.428 5.84 1.43 6.8.04 12.44-1.807 7.318-5.672 13.252-10.872 16.694-8.508 5.63 3.756 5.33-211.916 5.216-108.56-.056-199.22-.464-201.47-.906z"/></svg>');
         }
 
         .float-2 {
+          width: 241px;
           height: 100px;
           right: 210px;
           bottom: 0;
           animation-delay: 0.2s;
+          background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 536.25 222.1875" height="100" width="241"><path fill="#{hex-color(lighten($ui-base-color, 26%))}" d="M42.626 221.23c-14.104-1.174-26.442-5.133-32.825-10.534-4.194-3.548-7.684-10.66-8.868-18.075-1.934-12.102.633-22.265 7.528-29.81 7.61-8.328 19.998-12.76 39.855-14.257l8.47-.638-2.08-6.223c-4.826-14.422-6.357-24.813-6.37-43.255-.012-14.923.28-18.513 2.1-25.724 2.283-9.048 8.483-23.034 13.345-30.1 14.76-21.45 43.505-38.425 70.535-41.65 30.628-3.655 64.47 12.073 89.668 41.673l5.955 6.995 2.765-4.174c1.52-2.296 5.74-6.93 9.376-10.295 18.382-17.02 43.436-20.676 73.352-10.705 12.158 4.052 21.315 9.53 29.64 17.733 12.752 12.562 18.16 25.718 18.19 44.26l.02 10.98 2.312-3.01c15.64-20.365 42.29-20.485 62.438-.28 3.644 3.653 7.558 8.593 8.697 10.976 4.895 10.24 5.932 25.688 2.486 37.046-.76 2.507-1.388 4.816-1.393 5.13-.006.316 6.845.87 15.224 1.234 53.06 2.297 76.356 12.98 81.817 37.526 3.554 15.973-3.71 28.604-19.566 34.02-4.554 1.555-17.922 1.655-234.517 1.757-126.327.06-233.497-.21-238.154-.597z"/></svg>');
         }
 
         .float-3 {
+          width: 267px;
           height: 140px;
           right: 110px;
           top: -30px;
           animation-delay: 0.1s;
+          background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 388.125 202.5" height="140" width="267"><path fill="#{hex-color(lighten($ui-base-color, 26%))}" d="M181.37 201.458c-17.184-1.81-36.762-8.944-49.523-18.05l-5.774-4.12-8.074 2.63c-11.468 3.738-21.382 4.962-35.815 4.422-14.79-.554-24.577-2.845-36.716-8.594-15.483-7.332-28.498-19.98-35.985-34.968C2.44 128.675-.94 108.435.9 91.356c3.362-31.234 18.197-53.698 43.63-66.074 12.803-6.23 22.384-8.55 37.655-9.122 14.433-.54 24.347.684 35.814 4.42l8.073 2.633 5.635-4.01c24.81-17.656 60.007-23.332 92.914-14.985 10.11 2.565 25.498 9.62 33.102 15.178l5.068 3.704 7.632-2.564c10.89-3.66 21.086-4.916 35.516-4.376 45.816 1.716 76.422 30.03 81.285 75.196 1.84 17.08-1.54 37.32-8.585 51.422-7.487 14.99-20.502 27.636-35.984 34.968-12.14 5.75-21.926 8.04-36.716 8.593-14.43.54-24.626-.716-35.516-4.376l-7.632-2.564-5.068 3.704c-12.844 9.387-32.714 16.488-51.545 18.42-10.607 1.09-13.916 1.08-24.81-.066z"/></svg>');
         }
       }
 

app/views/about/show.html.haml

@@ -38,9 +38,9 @@
 
       .container.hero
         .floats
-          = image_tag asset_pack_path('cloud2.png'), alt: '', role: 'presentation', class: 'float-1'
-          = image_tag asset_pack_path('cloud3.png'), alt: '', role: 'presentation', class: 'float-2'
-          = image_tag asset_pack_path('cloud4.png'), alt: '', role: 'presentation', class: 'float-3'
+          %div{ role: 'presentation', class: 'float-1' }
+          %div{ role: 'presentation', class: 'float-2' }
+          %div{ role: 'presentation', class: 'float-3' }
         .heading
           %h1
             = @instance_presenter.site_title