/* A container should group all your columns. */
.container {
  width: 900px;
  margin: 0 auto;
}

/* Sets up basic grid floating and margin. */
div.span-1, div.span-2, div.span-3, div.span-4, div.span-5, div.span-5a,
div.span-6, div.span-7, div.span-8, div.span-9, div.span-10, div.span-11, div.span-12, div.span-13, div.span-14, div.span-15, div.span-16, div.span-17, div.span-18, div.span-19, div.span-20, div.span-21, div.span-22, div.span-23 {float:left;margin-right: 20px;}

/* The last column in a row needs this class. */
div.last { margin-right: 0; }

/* Use these classes to set the width of a column. */
.span-1  { width: 20px;}
.span-2  { width: 60px;}
.span-3  { width: 100px;}
.span-4  { width: 140px;}
.span-5a  { width: 180px;}
.span-5  { width: 180px;}
.span-6  { width: 220px;}
.span-7  { width: 260px;}
.span-8  { width: 300px;}
.span-9  { width: 340px;}
.span-10 { width: 380px;}
.span-11 { width: 420px;}
.span-12 { width: 460px;}
.span-13 { width: 500px;}
.span-14 { width: 540px;}
.span-15 { width: 580px;}
.span-16 { width: 620px;}
.span-17 { width: 660px;}
.span-18 { width: 700px;}
.span-19 { width: 740px;}
.span-20 { width: 780px;}
.span-21 { width: 820px;}
.span-22 { width: 860px;}
.span-23, div.span-23 { width: 900px; margin: 0; }


/* Clearing floats without extra markup
   Based on How To Clear Floats Without Structural Markup by PiE
   [http://www.positioniseverything.net/easyclearing.html] */

.clearfix:after, .container:after {
    content: "."; 
    display: block; 
    height: 0; 
    clear: both; 
    visibility: hidden;
}
.clearfix, .container {display: inline-block;}
* html .clearfix,
* html .container {height: 1%;}
.clearfix, .container {display: block;}

/* Regular clearing
   apply to column that should drop below previous ones. */

.clear { clear:both; }