*,:after,:before{box-sizing:border-box}body{background-color:#fff}main{overflow:auto;white-space:nowrap}header{position:fixed;top:0;left:0;right:0;min-height:38px;border-bottom:1px solid grey;padding:8px 4px;background-color:#fff}.intro{white-space:normal}.header-spacer{height:38px;margin-bottom:10px}.row,.tile{height:20px}.tile{width:20px;display:inline-block;vertical-align:top}.plains{background-color:#ffc107}.mountains{background-color:#a53d00}.forests{background-color:green}.water{background-color:#00359e}