table, th, td {
	border-collapse:collapse;
  border: 1px solid gray;
}
th {
	text-align: center;
}
th, td {
	padding: 6px;
}
img {
  border: 2px solid gray;
	margin: 6px;
}
h3 {
	font-size: 140%;
	/*text-decoration: underline gray; cf. text-decoration-thickness */
	border-bottom: 3px solid gray;
}
h4 {
	font-size: 120%;
}