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h1{background:black; color:white; margin-top:0; font-size:2em; padding-left:.5em}
ol{margin:0; padding:0; line-height: 1.2; background: #f0f0ff;}
li{margin:0; padding:0; margin-left:5em;background:#dde;padding-left:1em;}
li:nth-child(2n){background-color:#d8d8e8}
li:target{background-color:#82C0F3;}
pre{font-size:1em;font-family:consolas,monospace;margin:0;padding:0}