some style bug fix

assets/sass/abstracts/_variables.scss

@@ -14,4 +14,4 @@ $breakpoints: (
 );
 
 $search-height: 35px !default;
-$code-font-size: .95em !default;
+$code-font-size: .9rem !default;

assets/sass/pages/_single.scss

@@ -52,7 +52,7 @@
     font-size: 1rem;
     font-family: $content-font;
     margin: 1rem 0;
-    line-height: 1.7rem;
+    line-height: 1.7;
     width: inheirt;
     max-width: inherit;
     h1,
@@ -182,7 +182,7 @@
       margin: 0 1.75rem 1.75rem 1.5rem;
       padding: 0 0 0 1.42188rem;
       font-size: 1.05rem;
-      line-height: 1.75rem;
+      line-height: 1.75;
       color: inherit;
       opacity: 0.8;
       position: relative;
@@ -316,7 +316,7 @@
 
 code, pre {  
   padding: .5rem 0;
-  line-height: 1.5em;
+  line-height: 1.4;
   font-size: $code-font-size;
   font-family: $code-font-stack;
   position: relative;

assets/sass/themes/_hacker.scss

@@ -49,7 +49,7 @@ $hacker: (
     content-pre-main-color: #1FFF2A,
     content-pre-color: #d1d1d1,
     content-pre-number-color: #666,
-    content-pre-background-color: #202420,
+    content-pre-background-color: #282a36,
     content-pre-border-background-color: #f3ff6e,
     content-pre-header-background-color: darken(#202420, 1.5%),
     content-pre-header-color: #f3ff6e,