feat: Io module optimize

elements/_sections.scss

@@ -152,7 +152,7 @@ aside {
 		ul.vertical li {
 			margin-bottom: $space_half;
 
-			.a_button > *:last-child {
+			.a_button>i:last-child {
 				margin-left: auto;
 			}
 		}
@@ -263,22 +263,14 @@ footer {
 		nav {
 			@extend %flex-inline;
 			align-items: stretch;
-		}
 
-		input {
-			@extend .input_io;
-		}
-
-		textarea {
-			@extend .io_textarea;
-		}
-
-		select {
-			@extend .io_select;
-		}
-
-		button {
-			@extend .button_io;
+			input,
+			select,
+			button,
+			span,
+			div:not(.spacer) {
+				padding: 0 $space_half !important;
+			}
 		}
 	}
 }