Add minireset, Fix color luminance

sass/elements/notification.sass

@@ -1,9 +1,8 @@
-@import "../base/placeholders.sass"
 @import "../utilities/mixins.sass"
 @import "../utilities/variables.sass"
 
 .notification
-  @extend %block
+  +block
   +clearfix
   background-color: $background
   border-radius: $radius
@@ -13,8 +12,9 @@
     border-radius: 0 $radius
     float: right
     margin: -16px -20px 0 20px
+  .title,
   .subtitle,
-  .title
+  .content
     color: inherit
   // Colors
   @each $name, $pair in $colors