/*
Syntax error: Undefined variable: "$button-font-size".
        on line 10 of sass/buttons.scss

5: .btn {
6:   position: relative;
7:   display: inline-block;
8:   padding: 6px 8px 7px;
9:   margin-bottom: 0; // For input.btn
10:   font-size: $button-font-size;
11:   font-weight: $font-weight-light;
12:   line-height: 1;
13:   color: #333;
14:   text-align: center;
15:   white-space: nowrap;

Backtrace:
sass/buttons.scss:10
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/script/tree/variable.rb:49:in `_perform'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/script/tree/node.rb:50:in `perform'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/tree/visitors/perform.rb:366:in `visit_prop'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/tree/visitors/base.rb:36:in `visit'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/tree/visitors/perform.rb:152:in `block in visit'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/stack.rb:79:in `block in with_base'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/stack.rb:121:in `with_frame'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/stack.rb:79:in `with_base'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/tree/visitors/perform.rb:152:in `visit'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/tree/visitors/perform.rb:389:in `block (2 levels) in visit_rule'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/tree/visitors/perform.rb:389:in `map'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/tree/visitors/perform.rb:389:in `block in visit_rule'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/tree/visitors/perform.rb:173:in `with_environment'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/tree/visitors/perform.rb:387:in `visit_rule'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/tree/visitors/base.rb:36:in `visit'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/tree/visitors/perform.rb:152:in `block in visit'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/stack.rb:79:in `block in with_base'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/stack.rb:121:in `with_frame'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/stack.rb:79:in `with_base'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/tree/visitors/perform.rb:152:in `visit'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/tree/visitors/base.rb:52:in `block in visit_children'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/tree/visitors/base.rb:52:in `map'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/tree/visitors/base.rb:52:in `visit_children'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/tree/visitors/perform.rb:161:in `block in visit_children'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/tree/visitors/perform.rb:173:in `with_environment'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/tree/visitors/perform.rb:160:in `visit_children'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/tree/visitors/base.rb:36:in `block in visit'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/tree/visitors/perform.rb:180:in `visit_root'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/tree/visitors/base.rb:36:in `visit'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/tree/visitors/perform.rb:151:in `visit'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/tree/visitors/perform.rb:8:in `visit'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/tree/root_node.rb:36:in `css_tree'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/tree/root_node.rb:20:in `render'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/engine.rb:274:in `render'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/plugin/compiler.rb:414:in `update_stylesheet'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/plugin/compiler.rb:189:in `block in update_stylesheets'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/plugin/compiler.rb:186:in `each'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/plugin/compiler.rb:186:in `update_stylesheets'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/plugin/compiler.rb:221:in `watch'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/plugin.rb:108:in `method_missing'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/exec.rb:509:in `watch_or_update'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/exec.rb:346:in `process_result'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/exec.rb:43:in `parse'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/lib/sass/exec.rb:22:in `parse!'
/Users/airen/.rvm/gems/ruby-2.1.1/gems/sass-3.3.6/bin/sass:13:in `<top (required)>'
/Users/airen/.rvm/gems/ruby-2.1.1/bin/sass:23:in `load'
/Users/airen/.rvm/gems/ruby-2.1.1/bin/sass:23:in `<main>'
/Users/airen/.rvm/gems/ruby-2.1.1/bin/ruby_executable_hooks:15:in `eval'
/Users/airen/.rvm/gems/ruby-2.1.1/bin/ruby_executable_hooks:15:in `<main>'
*/
body:before {
  white-space: pre;
  font-family: monospace;
  content: "Syntax error: Undefined variable: \"$button-font-size\".\A         on line 10 of sass/buttons.scss\A \A 5: .btn {\A 6:   position: relative;\A 7:   display: inline-block;\A 8:   padding: 6px 8px 7px;\A 9:   margin-bottom: 0; // For input.btn\A 10:   font-size: $button-font-size;\A 11:   font-weight: $font-weight-light;\A 12:   line-height: 1;\A 13:   color: #333;\A 14:   text-align: center;\A 15:   white-space: nowrap;"; }