Lined Paper with CSS

Lined Paper with CSS - Source : http://css3.wikidot.com/blog:lined-paper-with-css
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Repeating background gradient to give the effect of lines across the paper, and a pseudo element on the left to 
give the ruled margin.


.paper {
    font: normal 12px/1.5 "Lucida Grande", arial, sans-serif;
    width: 300px;
    margin: 0 auto 10px;
    padding: 6px 5px 4px 42px;
    position: relative;
    color: #444;
    line-height: 20px;
    border: 1px solid #d2d2d2;
 
    background: #fff;
    background: -webkit-gradient(linear, 0 0, 0 100%, from(#d9eaf3), color-stop(4%, #fff)) 0 4px;
    background: -webkit-linear-gradient(top, #d9eaf3 0%, #fff 8%) 0 4px;
    background: -moz-linear-gradient(top, #d9eaf3 0%, #fff 8%) 0 4px;
    background: -ms-linear-gradient(top, #d9eaf3 0%, #fff 8%) 0 4px;
    background: -o-linear-gradient(top, #d9eaf3 0%, #fff 8%) 0 4px;
    background: linear-gradient(top, #d9eaf3 0%, #fff 8%) 0 4px;
 
    -webkit-background-size: 100% 20px;
    -moz-background-size: 100% 20px;
    -ms-background-size: 100% 20px;
    -o-background-size: 100% 20px;
    background-size: 100% 20px;
 
    -webkit-border-radius: 3px;
    -moz-border-radius: 3px;
    border-radius: 3px;
 
    -webkit-box-shadow: 0 1px 2px rgba(0,0,0,0.07);
    -moz-box-shadow: 0 1px 2px rgba(0,0,0,0.07);
    box-shadow: 0 1px 2px rgba(0,0,0,0.07);
}
.paper::before {
    content: '';
    position: absolute;
    width: 4px;
    top: 0;
    left: 30px;
    bottom: 0;
    border: 1px solid;
    border-color: transparent #efe4e4;
}

In order to get all the text to line up properly on the lines, you need to specifically declare margins and line 
heights for all text elements. Given we used a background size of 20px above (i.e. it's 20px between the lines), 
we need to use a line height (or an equivalent line height + margin) of 20px.

.paper h1,
.paper h2 {
    font-size: 16px;
    line-height: 16px;
    margin: 0 0 4px;
}
.paper h3,
.paper h4,
.paper h5 {
    font-size: 14px;
    line-height: 16px;
    margin: 0 0 4px;
}
.paper h4,
.paper h5 {
    font-weight: normal;
}
.paper p {margin: 0 0 20px;}
.paper p:last-child {margin: 0;}
.paper ul {margin: 0 0 20px;}


Browser support

It works perfectly in Webkit and Opera, and almost perfectly in Firefox (the ruled margins on the left are 1 pixel 
too short at one end). Theoretically it should work in IE10, but I haven't tested it.