screen.css

/* reset */
body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,code,form,fieldset,legend,input,textarea,p,blockquote,th,td{margin:0;padding:0}table{border-collapse:collapse;border-spacing:0}fieldset,img{border:0}address,caption,cite,code,dfn,em,strong,th,var{font-style:normal;font-weight:normal}ol,ul{list-style:none}caption,th{text-align:left}h1,h2,h3,h4,h5,h6{font-size:100%;font-weight:normal}q:before,q:after{content:''}abbr,acronym{border:0;font-variant:normal}sup{vertical-align:text-top}sub{vertical-align:text-bottom}input,textarea,select{font-family:inherit;font-size:inherit;font-weight:inherit}input,textarea,select{*font-size:100%}legend{color:#000}#yui3-css-stamp.cssreset{display:none}

/*
 light: e03639;
 gray: eeede8;
 dark: 333;
*/

* { font-family: 'Open Sans', sans-serif; font-size: 14px; color: #333; line-height: 1.6em }
h1, h2, h3, h4 { font-family: 'Ubuntu' sans-serif }
header { background: #de252a; color: white; text-align: center }
h1 { height: 180px; background: url('logo.png') top center no-repeat; text-indent: -999em }
h2 { color: white; text-transform: uppercase; font-size: 36px; padding: 10px 0 20px }
a { color: #2518b5 }
ol { list-style-type: decimal; padding: 30px }
code { font-family: monospace; padding: 0 .2em; color: #000 }
strong { font-weight: bold }

#explanation div, footer p, article { width: 1000px; margin-left: auto; margin-right: auto }

#explanation { background: #eeede8; padding: 30px 0; border-bottom: 8px #333 solid }

h3 { font-size: 20px; padding-bottom: 10px; margin: 50px 0 20px; border-bottom: 2px #eeede8 solid }

table { width: 800px; margin: 0 auto; table-layout: fixed }
th { padding: 1em 0; background-color; background: #eeede8 }
th[scope=col] { border-bottom: 1px #333 solid }
th[scope=row] { border-right: 1px #333 solid }
th, td { text-align: center }
td { border-right: 1px #eeede8 solid }
tbody tr { border-bottom: 1px #eeede8 solid }

footer { background: #333; color: white; text-align: right; padding: 30px 0; margin-top: 50px }
footer a, footer p { color: white }