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Pen Settings

CSS Base

Vendor Prefixing

Add External CSS

These stylesheets will be added in this order and before the code you write in the CSS editor. You can also add another Pen here, and it will pull the CSS from it. Try typing "font" or "ribbon" below.

Quick-add: + add another resource

Add External JavaScript

These scripts will run in this order and before the code in the JavaScript editor. You can also link to another Pen here, and it will run the JavaScript from it. Also try typing the name of any popular library.

Quick-add: + add another resource

Code Indentation


Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

              @import "compass/css3";

// using the cascade we can write default behavior and override it with modifying classes.

.sidebar {
  width: 30%;
  // default behavior is floating left
  float: left;

// explicit modifiers change default behavior
.sidebar.right {
  float: right;

// You can add generic modifiers to the bottom of your style sheet.

.right {
  float: right;

.left {
  float: left;

// default modifiers can be placed at the end and will not override explicit instances because of how things are scored.

// Here is an example of scoring where we want colored sidebars to be blue.
.sidebar.color {
  background-color: blue;

// The default behavior of the color modifier is red, but .sidebar.color is a stronger selector even though this is later in the cascade.
.color {
  background-color: red;
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