diff --git a/app/assets/stylesheets/common/base/alert.scss b/app/assets/stylesheets/common/base/alert.scss
index fe80bb2ebaf..1476a3f2338 100644
--- a/app/assets/stylesheets/common/base/alert.scss
+++ b/app/assets/stylesheets/common/base/alert.scss
@@ -11,7 +11,6 @@
     float: right;
     font-size: 1.429em;
     font-weight: bold;
-    line-height: 18px;
     color: $primary;
     opacity: 0.2;
     filter: alpha(opacity = 20);
diff --git a/app/assets/stylesheets/common/base/emoji.scss b/app/assets/stylesheets/common/base/emoji.scss
index fb658ea4a5a..2d9061bffc3 100644
--- a/app/assets/stylesheets/common/base/emoji.scss
+++ b/app/assets/stylesheets/common/base/emoji.scss
@@ -51,9 +51,7 @@ body img.emoji {
 }
 
 .emoji-modal .toolbar {
-  margin: 0;
-  margin-top: 8px;
-  margin-bottom: 5px
+  margin: 8px 0 5px;
 }
 
 .emoji-modal .toolbar li {
diff --git a/app/assets/stylesheets/common/base/magnific-popup.scss b/app/assets/stylesheets/common/base/magnific-popup.scss
index 98ead180b7b..3aa7f39eb4d 100644
--- a/app/assets/stylesheets/common/base/magnific-popup.scss
+++ b/app/assets/stylesheets/common/base/magnific-popup.scss
@@ -337,9 +337,8 @@ button {
     @if $IE7support {
       filter: unquote("alpha(opacity=#{$controls-opacity*100})");
     }
-    margin: 0;
     top: 50%;
-    margin-top: -55px;
+    margin: -55px 0 0;
     padding: 0;
     width: 90px;
     height: 110px;
diff --git a/app/assets/stylesheets/common/base/modal.scss b/app/assets/stylesheets/common/base/modal.scss
index 0df5f7b412e..ee8de426b20 100644
--- a/app/assets/stylesheets/common/base/modal.scss
+++ b/app/assets/stylesheets/common/base/modal.scss
@@ -65,7 +65,6 @@
   margin: 0 auto;
   background-color: $secondary;
   border: 1px solid dark-light-diff($primary, $secondary, 90%, -60%);
-  border: 1px solid dark-light-diff($primary, $secondary, 90%, -60%);
 
   box-shadow: 0 3px 7px rgba(0,0,0, .8);
   background-clip: padding-box;
diff --git a/app/assets/stylesheets/common/base/onebox.scss b/app/assets/stylesheets/common/base/onebox.scss
index a533a15f1b5..11e3fecf3bb 100644
--- a/app/assets/stylesheets/common/base/onebox.scss
+++ b/app/assets/stylesheets/common/base/onebox.scss
@@ -82,8 +82,7 @@ a.loading-onebox {
 
 @mixin onebox-favicon($class, $image) {
   &.#{$class} .source {
-    background-image: image-url("favicons/#{$image}.png");
-    background-repeat: no-repeat;
+    background: image-url("favicons/#{$image}.png") no-repeat;
     padding-left: 20px;
   }
 }
diff --git a/app/assets/stylesheets/common/base/pagedown.scss b/app/assets/stylesheets/common/base/pagedown.scss
index ec7b7c3757c..8cac61a14ff 100644
--- a/app/assets/stylesheets/common/base/pagedown.scss
+++ b/app/assets/stylesheets/common/base/pagedown.scss
@@ -13,10 +13,7 @@
 }
 
 .wmd-button-row {
-  margin-left: 5px;
-  margin-right: 5px;
-  margin-bottom: 5px;
-  margin-top: 5px;
+  margin: 5px;
   padding: 0;
   height: 20px;
   overflow: hidden;
@@ -33,18 +30,9 @@
 }
 
 .wmd-button {
-  width: 20px;
-  height: 20px;
-  padding-left: 2px;
-  padding-right: 3px;
   margin-right: 5px;
-  background-repeat: no-repeat;
-  background-position: 0 0;
   border: 0;
-  width: 20px;
-  height: 20px;
   position: relative;
-  border: 0;
   float: left;
   font-family: FontAwesome;
   font-weight: normal;
diff --git a/app/assets/stylesheets/common/base/upload.scss b/app/assets/stylesheets/common/base/upload.scss
index 97fdf508ec4..6afba003ef1 100644
--- a/app/assets/stylesheets/common/base/upload.scss
+++ b/app/assets/stylesheets/common/base/upload.scss
@@ -1,5 +1,4 @@
 .uploaded-image-preview {
-  background-position: center center;
   background-size: cover;
-  background-color: $primary;
+  background: $primary center center;
 }
diff --git a/app/assets/stylesheets/common/base/user-badges.scss b/app/assets/stylesheets/common/base/user-badges.scss
index 74b87c82651..e1bd5d0862c 100644
--- a/app/assets/stylesheets/common/base/user-badges.scss
+++ b/app/assets/stylesheets/common/base/user-badges.scss
@@ -4,10 +4,9 @@
   color: $primary;
   border: 1px solid dark-light-diff($primary, $secondary, 90%, -65%);
   line-height: 19px;
-  margin: 0;
   display: inline-block;
   background-color: $secondary;
-  margin-bottom: 3px;
+  margin: 0 0 3px;
 
   .fa {
     padding-right: 3px;
@@ -52,8 +51,7 @@
 
     img {
       display: block;
-      margin: auto;
-      margin-bottom: 4px;
+      margin: auto auto 4px;
       width: 55px;
       height: 55px;
     }
diff --git a/app/assets/stylesheets/common/base/username_tagsinput.scss b/app/assets/stylesheets/common/base/username_tagsinput.scss
index 8e0f60dca90..c18494c18c1 100644
--- a/app/assets/stylesheets/common/base/username_tagsinput.scss
+++ b/app/assets/stylesheets/common/base/username_tagsinput.scss
@@ -24,8 +24,17 @@ div.tagsinput span.tag {
 }
 
 div.tagsinput span.tag a { font-weight: bold; color: #82ad2b; text-decoration:none; font-size: 11px;  }
-div.tagsinput input { width:80px; margin:0px; font-family: helvetica; font-size: 0.929em; border:1px solid transparent;
-padding:2px 5px; background: transparent; color: #000; outline:0px;  margin-right:5px; margin-bottom:5px; }
+div.tagsinput input {
+  width:80px;
+  font-family: helvetica;
+  font-size: 0.929em;
+  border:1px solid transparent;
+  padding:2px 5px;
+  background: transparent;
+  color: #000;
+  outline:0px;
+  margin: 0px 5px 5px 0px;
+}
 div.tagsinput div { display:block; float: left; }
 .tags_clear { clear: both; width: 100%; height: 0; }
 .not_valid {background: #FBD8DB !important; color: #90111A !important;}
diff --git a/app/assets/stylesheets/common/components/navs.css.scss b/app/assets/stylesheets/common/components/navs.css.scss
index 5934c2fb740..d29d05a3d02 100644
--- a/app/assets/stylesheets/common/components/navs.css.scss
+++ b/app/assets/stylesheets/common/components/navs.css.scss
@@ -75,10 +75,9 @@
   {
     left: 90%;
     top: 33%;
-    border: solid transparent;
     content: " ";
     position: absolute;
-    border-width: 8px;
+    border: 8px solid transparent;
     border-left-color: $secondary;
   }
 
diff --git a/app/assets/stylesheets/common/foundation/mixins.scss b/app/assets/stylesheets/common/foundation/mixins.scss
index 60a682ac094..2243802d16e 100644
--- a/app/assets/stylesheets/common/foundation/mixins.scss
+++ b/app/assets/stylesheets/common/foundation/mixins.scss
@@ -60,6 +60,7 @@
 
 // Linear gradient
 
+//noinspection CssOptimizeSimilarProperties
 @mixin linear-gradient($start-color, $end-color) {
   background-color: $start-color;
   background-image: linear-gradient(to bottom, $start-color, $end-color);
diff --git a/app/assets/stylesheets/common/topic-entrance.scss b/app/assets/stylesheets/common/topic-entrance.scss
index 8316aae9eb9..847edc46a86 100644
--- a/app/assets/stylesheets/common/topic-entrance.scss
+++ b/app/assets/stylesheets/common/topic-entrance.scss
@@ -8,8 +8,6 @@
 
   position: absolute;
   width: 133px;
-  padding: 5px;
-
   @include unselectable;
 
   button.full {
diff --git a/app/assets/stylesheets/desktop/discourse.scss b/app/assets/stylesheets/desktop/discourse.scss
index 0d117b4ae26..e25653136a8 100644
--- a/app/assets/stylesheets/desktop/discourse.scss
+++ b/app/assets/stylesheets/desktop/discourse.scss
@@ -77,12 +77,12 @@ body {
 
   .grippie {
     width: 100%;
-    border: 1px solid dark-light-diff($primary, $secondary, 90%, -60%);
-    border-width: 1px 0;
+    border: 1px solid;
+    border-right-width: 0;
+    border-left-width: 0;
     cursor: row-resize;
     height: 11px;
     overflow: hidden;
-    background-color: dark-light-diff($primary, $secondary, 90%, -60%);
     display:block;
     background: image-url("grippie.png") dark-light-diff($primary, $secondary, 90%, -60%) no-repeat center 3px;
   }
diff --git a/app/assets/stylesheets/desktop/modal.scss b/app/assets/stylesheets/desktop/modal.scss
index 8c527e21f76..c9d5b84c388 100644
--- a/app/assets/stylesheets/desktop/modal.scss
+++ b/app/assets/stylesheets/desktop/modal.scss
@@ -17,7 +17,6 @@
   margin: -250px 0 0 -305px;
   background-color: $secondary;
   border: 1px solid dark-light-diff($primary, $secondary, 90%, -60%);
-  border: 1px solid dark-light-diff($primary, $secondary, 90%, -60%);
 
   box-shadow: 0 3px 7px rgba(0,0,0, .8);
   background-clip: padding-box;
diff --git a/app/assets/stylesheets/desktop/topic-list.scss b/app/assets/stylesheets/desktop/topic-list.scss
index 2e90524da09..8d3a880b1c9 100644
--- a/app/assets/stylesheets/desktop/topic-list.scss
+++ b/app/assets/stylesheets/desktop/topic-list.scss
@@ -182,8 +182,7 @@
   }
   td.latest {
     vertical-align: top;
-    padding: 8px;
-    padding-top: 0;
+    padding: 0 8px 8px;
   }
   .last-user-info {
     font-size: 0.857em;
diff --git a/app/assets/stylesheets/desktop/topic-post.scss b/app/assets/stylesheets/desktop/topic-post.scss
index b9743534167..736eb7ff60d 100644
--- a/app/assets/stylesheets/desktop/topic-post.scss
+++ b/app/assets/stylesheets/desktop/topic-post.scss
@@ -797,7 +797,6 @@ $topic-avatar-width: 45px;
 
 #selected-posts {
 
-  padding-left: 20px;
   margin-left: 330px;
   width: 200px;
   position: fixed;
diff --git a/app/assets/stylesheets/mobile/discourse.scss b/app/assets/stylesheets/mobile/discourse.scss
index f4a32585b6b..4d56b037f17 100644
--- a/app/assets/stylesheets/mobile/discourse.scss
+++ b/app/assets/stylesheets/mobile/discourse.scss
@@ -88,8 +88,7 @@ blockquote {
 // we must remove margins for text site titles
 h2#site-text-logo
 {
-  margin: 0;
-  margin-left: 10px;
+  margin: 0 0 0 10px;
 }
 
 // categories should not be bold on mobile; they fight with the topic title too much
diff --git a/app/assets/stylesheets/mobile/modal.scss b/app/assets/stylesheets/mobile/modal.scss
index 8c94edf25cd..e54ab173ce5 100644
--- a/app/assets/stylesheets/mobile/modal.scss
+++ b/app/assets/stylesheets/mobile/modal.scss
@@ -17,7 +17,6 @@
   width: 100%;
   height: auto;
   background-color: $secondary;
-  border: 1px solid scale-color($secondary, $lightness: 90%);
   border: 1px solid rgba(0, 0, 0, 0.3);
 
   @include border-radius-all (6px);
@@ -178,4 +177,4 @@
 
 #search-help p {
  margin: 5px;
-}
\ No newline at end of file
+}
diff --git a/app/assets/stylesheets/mobile/topic-list.scss b/app/assets/stylesheets/mobile/topic-list.scss
index 5f71cddcad2..47c69376bb5 100644
--- a/app/assets/stylesheets/mobile/topic-list.scss
+++ b/app/assets/stylesheets/mobile/topic-list.scss
@@ -268,17 +268,14 @@ tr.category-topic-link {
   float: left;
   width: 280px;
   padding: 4px 0;
-  margin: 1px 0 0;
   list-style: none;
   background-color: $secondary;
-  border: 1px solid dark-light-diff($primary, $secondary, 90%, -60%);
-  border: 1px solid rgba(0, 0, 0, 0.2);
+  border: 1px solid dark-light-choose(rgba(0, 0, 0, 0.2), scale-color($primary, $lightness: -60%));
   border-radius: 5px;
   box-shadow: 0 5px 10px rgba(0, 0, 0, 0.2);
   background-clip: padding-box;
-  margin-bottom: 20px;
-.title {font-weight: bold; display: block;}
-
+  margin: 1px 0 20px;
+  .title {font-weight: bold; display: block;}
 }
 .dropdown-menu a {
   display: block;
diff --git a/app/assets/stylesheets/mobile/topic.scss b/app/assets/stylesheets/mobile/topic.scss
index db76dd41f7d..9bc347b650c 100644
--- a/app/assets/stylesheets/mobile/topic.scss
+++ b/app/assets/stylesheets/mobile/topic.scss
@@ -69,7 +69,6 @@
   position: absolute;
   bottom: 34px;
   width: 133px;
-  padding: 5px;
 
   button.full {
     width: 100%;
diff --git a/app/assets/stylesheets/mobile/user.scss b/app/assets/stylesheets/mobile/user.scss
index 1f45f68ee85..03ec7fb16fc 100644
--- a/app/assets/stylesheets/mobile/user.scss
+++ b/app/assets/stylesheets/mobile/user.scss
@@ -221,9 +221,8 @@
   }
 
   .about {
-    background-color: dark-light-diff($primary, $secondary, 0%, -75%);
     background-size: cover;
-    background-position: center center;
+    background: dark-light-diff($primary, $secondary, 0%, -75%) center center;
     width: 100%;
     margin-bottom: 10px;
     overflow: hidden;
diff --git a/app/assets/stylesheets/vendor/bootstrap.scss b/app/assets/stylesheets/vendor/bootstrap.scss
index cf73b4d7d80..df21cf6c8a1 100644
--- a/app/assets/stylesheets/vendor/bootstrap.scss
+++ b/app/assets/stylesheets/vendor/bootstrap.scss
@@ -14,6 +14,7 @@
 
  @import "common/foundation/mixins";
 
+//noinspection CssOverwrittenProperties
 a:focus {
   outline: thin dotted #333;
   outline: 5px auto -webkit-focus-ring-color;
diff --git a/app/assets/stylesheets/vendor/pikaday.scss b/app/assets/stylesheets/vendor/pikaday.scss
index 3b2a3c0a80b..a12e8e54600 100644
--- a/app/assets/stylesheets/vendor/pikaday.scss
+++ b/app/assets/stylesheets/vendor/pikaday.scss
@@ -86,9 +86,7 @@
     text-indent: 20px; // hide text using text-indent trick, using width value (it's enough)
     white-space: nowrap;
     overflow: hidden;
-    background-color: transparent;
-    background-position: center center;
-    background-repeat: no-repeat;
+    background: transparent no-repeat center center;
     background-size: 75% 75%;
     opacity: .5;
     *position: absolute;
diff --git a/app/assets/stylesheets/vendor/select2.scss b/app/assets/stylesheets/vendor/select2.scss
index aa3d61372ab..828c7185173 100644
--- a/app/assets/stylesheets/vendor/select2.scss
+++ b/app/assets/stylesheets/vendor/select2.scss
@@ -200,6 +200,7 @@ Version: @@ver@@ Timestamp: @@timestamp@@
     white-space: nowrap;
 }
 
+//noinspection CssOverwrittenProperties
 .select2-search input {
     width: 100%;
     height: auto !important;
@@ -228,6 +229,7 @@ Version: @@ver@@ Timestamp: @@timestamp@@
     margin-top: 4px;
 }
 
+//noinspection CssOverwrittenProperties
 .select2-search input.select2-active {
     background: #fff asset-url('select2-spinner.gif') no-repeat 100%;
     background: asset-url('select2-spinner.gif') no-repeat 100%, -webkit-gradient(linear, left bottom, left top, color-stop(0.85, #fff), color-stop(0.99, #eee));
@@ -389,16 +391,14 @@ disabled look for disabled choices in the results dropdown
 /* disabled styles */
 
 .select2-container.select2-container-disabled .select2-choice {
-    background-color: #f4f4f4;
-    background-image: none;
-    border: 1px solid #ddd;
-    cursor: default;
+  background: #f4f4f4 none;
+  border: 1px solid #ddd;
+  cursor: default;
 }
 
 .select2-container.select2-container-disabled .select2-choice .select2-arrow {
-    background-color: #f4f4f4;
-    background-image: none;
-    border-left: 0;
+  background: #f4f4f4 none;
+  border-left: 0;
 }
 
 .select2-container.select2-container-disabled .select2-choice abbr {
@@ -540,17 +540,15 @@ html[dir="rtl"] .select2-search-choice-close {
 
 /* disabled styles */
 .select2-container-multi.select2-container-disabled .select2-choices {
-    background-color: #f4f4f4;
-    background-image: none;
-    border: 1px solid #ddd;
-    cursor: default;
+  background: #f4f4f4 none;
+  border: 1px solid #ddd;
+  cursor: default;
 }
 
 .select2-container-multi.select2-container-disabled .select2-choices .select2-search-choice {
-    padding: 3px 5px 3px 5px;
-    border: 1px solid #ddd;
-    background-image: none;
-    background-color: #f4f4f4;
+  padding: 3px 5px 3px 5px;
+  border: 1px solid #ddd;
+  background: #f4f4f4 none;
 }
 
 .select2-container-multi.select2-container-disabled .select2-choices .select2-search-choice .select2-search-choice-close {    display: none;
@@ -594,16 +592,15 @@ html[dir="rtl"] .select2-search-choice-close {
 /* Retina-ize icons */
 
 @media only screen and (-webkit-min-device-pixel-ratio: 1.5), only screen and (min-resolution: 2dppx)  {
-    .select2-search input,
-    .select2-search-choice-close,
-    .select2-container .select2-choice abbr,
-    .select2-container .select2-choice .select2-arrow b {
-        background-image: asset-url('select2x2.png') !important;
-        background-repeat: no-repeat !important;
-        background-size: 60px 40px !important;
-    }
+  .select2-search input,
+  .select2-search-choice-close,
+  .select2-container .select2-choice abbr,
+  .select2-container .select2-choice .select2-arrow b {
+    background: asset-url('select2x2.png') no-repeat !important;
+    background-size: 60px 40px !important;
+  }
 
-    .select2-search input {
-        background-position: 100% -21px !important;
-    }
+  .select2-search input {
+    background-position: 100% -21px !important;
+  }
 }