CSS

A reference

CSS allows you to customize the look of any HTML element. You can use CSS to make the background blue and the text to be a different font and more indented. The best way to do this is to give an HTML element a CSS class. This is similar to giving an element an attribute, you just add class="whatever" to the tag. Then you create a CSS class named whatever and list what looks you want any element with that class name to have.

This is a great reference for quickly seeing what CSS attributes do what. Here are some examples. 


/* every 'a' element wont be underlined */
a {
  text-decoration: none;
} 

/* any element with the 'sub-header' class will have
extra space below it and a border below it */
.sub-header {
  padding-bottom: 10px;
  border-bottom: 1px solid #eee;
} 

.toggle-area {
  position: fixed;
  right: 60px;
  top: 30px;
  width: 150px;
}

/* any element with the 'toggle-select id will be
175 pixels tall */
#toggle-select {
  height: 175px;
}

.sidebar {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 1000;
  display: block;
  padding: 20px;
  overflow-y: auto; /* Scrollable contents if viewport is shorter than content. */
  background-color: #f5f5f5;
  border-right: 1px solid #000;
  width: 175px;
}

.nav-sidebar {
  margin-right: -21px; /* 20px padding + 1px border */
  margin-bottom: 20px;
  margin-left: -20px;
}