index.css

body {
	background-color: lightblue;
	font-family: "Arial", Georgia, Serif;
}

h1 {
	color: darkred;
	margin-left: 5%;
	font-size: 24;
	/*font-family: "Arial", Georgia, Serif;*/
}

p {
	text-align: left;
	padding-left: 10px;
}

table#chart tr:nth-child(even) {
    background-color: #ccc;
}

table#chart tr:nth-child(odd) {
   background-color:#fff;
}

td {
	border: 2px solid black;
}

#calcError {
	color:red;
}