body {color:black; background:white;}

h1 {text-align:center;}
#layout {margin:0 10% 20px 10%;}
h2, h3, p.heading {margin:20px 0 2px 0;}
.button {margin-top:0; text-align:center; white-space:nowrap;}

.box {border:1px solid #369; padding:15px; color:black; background:#f9f9f9; text-align:center;}
.box td {padding:2px; vertical-align:middle;}
.spacer {width:50px;}

table {border-collapse:collapse;}
table.lookup {color:navy; background:white; font-family:monospace;}
table.lookup td {width:25%; padding:3px 8px; border:1px solid #369;}

table.gasmark {border:1px solid black; color:black; background:white; font-weight:bold;}
table.gasmark th {border-bottom:1px solid black; padding:4px 25px;}
table.gasmark td {padding:5px; text-align:center;}