Add large size buttons variant and make disabled state global

src/style/_base.scss

@@ -23,7 +23,7 @@ strong {
 em {
     font-style: normal;
 }
-figure, p, dl, dt, dd, ul, li {
+figure, p, dl, dt, dd, ul, ol, li {
     margin: 0;
     padding: 0;
 }
@@ -37,6 +37,10 @@ button {
     background: none;
     border: none;
     cursor: pointer;
+
+    &[disabled] {
+        cursor: not-allowed;
+    }
 }
 
 // Accessibility outline