body{margin:1rem}div{margin:1rem auto}nav a{display:block}nav{display:flex;justify-content:space-around}table{border-collapse:collapse}th{padding:8px;border:3px solid black;font-weight:bolder}tbody{background-color:gray}td{padding:8px;border:2px solid black;font-weight:lighter}.error-message{color:red;margin:1rem 0;font-family:Courier New,Courier,monospace}.note{color:purple}.red{color:red}.blue{color:#00f}.green{color:green}.form-element{display:block;padding:10px}.inner-element{margin:5px}.table-filter{margin:5px;padding:5px}