Replace Status underscore and minor style tweaks

src/styles/_base.sass

@@ -1,6 +1,10 @@
 body
 	background-color: $color-background
-	position: relative
+	position: fixed
+	top: 0
+	left: 0
+	right: 0
+	bottom: 0
 	height: 100%
 	width: 100%
 	margin: 0
@@ -38,24 +42,22 @@ nav.sidebar
 				&:hover
 					color: $color-text-light-primary
 
-#col_main
+#col_sidebar
+	width: $sidebar-width
+
+#col_left, #col_main, #col_right
 	display: flex
 	flex-direction: column
 	position: relative
-	width: 50%
-	height: 100%
 	flex: 1
-	margin-left: $sidebar-width
+	height: 100%
+
+#col_main
 	box-shadow: 1px 0 0 $color-background-dark
+	background-color: white
 
 #col_right
-	display: flex
-	flex-direction: column
-	position: relative
 	background-color: $color-background
-	width: 50%
-	height: 100%
-	flex: 1
 
 .col_header
 	position: relative
@@ -68,7 +70,9 @@ nav.sidebar
 	font:
 		size: 1.2em
 	border-bottom: thin solid $color-background
-	box-shadow: 0 -2px 20px rgba(black, .2)
+
+	&.scrolled
+		box-shadow: 0 -2px 20px rgba(black, .2)
 
 .col-list-item
 	display: flex