updated to latest version of Sass, fixed deprecation warnings

.themes/classic/sass/base/_layout.scss

@@ -127,16 +127,17 @@ body.sidebar-footer {
 @media only screen and (min-width: 750px) {
   aside.sidebar { @include collapse-sidebar; }
 }
+#main, #content, .sidebar {
+  @extend .group;
+}
 @media only screen and (min-width: 768px) {
   body { -webkit-text-size-adjust: auto; }
   body > header { font-size: $header-font-size * 1.2; }
   #main {
-    @extend .group;
     padding: 0;
     margin: 0 auto;
   }
   #content {
-    @extend .group;
     overflow: visible;
     margin-right: $sidebar-width-medium;
     position: relative;
@@ -149,7 +150,6 @@ body.sidebar-footer {
     }
   }
   aside.sidebar {
-    @extend .group;
     width: $sidebar-width-medium - $sidebar-pad-medium*2;
     padding: 0 $sidebar-pad-medium $sidebar-pad-medium;
     background: none;
@@ -180,7 +180,6 @@ body.sidebar-footer {
     padding: 1.2em $sidebar-pad-wide $sidebar-pad-wide;
     .collapse-sidebar & {
       padding: { left: $pad-wide; right: $pad-wide; }
-      @extend .group;
     }
   }
 }
@@ -190,3 +189,4 @@ body.sidebar-footer {
     ul, ol { margin-left: 0; }
   }
 }
+

.themes/classic/sass/partials/_navigation.scss

@@ -13,7 +13,7 @@ body > nav {
     .search {
       padding: .3em .5em 0;
       font-size: .85em;
-      @extend .sans;
+      font-family: $sans;
       line-height: 1.1em;
       width: 95%;
       @include border-radius(.5em);
@@ -54,7 +54,7 @@ body > nav {
     }
     a {
       @include link-colors($nav-color, $nav-color-hover, $visited: $nav-color);
-      @extend .sans;
+      font-family: $sans;
       text-shadow: lighten($nav-bg, 12) 0 1px;
       float: left;
       text-decoration: none;
@@ -134,3 +134,4 @@ body > nav {
   a[rel=subscribe-rss]{ @include mask-subscription-nav('rss.png'); }
   a[rel=subscribe-email]{ @include mask-subscription-nav('email.png'); }
 }
+

Gemfile.lock

@@ -39,7 +39,7 @@ GEM
     rubypython (0.5.1)
       blankslate (>= 2.1.2.3)
       ffi (~> 1.0.7)
-    sass (3.1.5)
+    sass (3.1.18)
     sinatra (1.2.6)
       rack (~> 1.1)
       tilt (>= 1.2.2, < 2.0)