univ.css

* {
	margin: 0 ;
	padding: 0 ;
	box-sizing: border-box;
}

body {
  font-family: 'Source Serif Pro', serif;
  font-size: 16px;
  line-height: 2;
  color: #333;
  margin: 0;
  padding: 0;
  text-align: center;
}

header {
	background-color: #333;
	color: #fff;
	padding: 1em;
}

nav ul {
	font-size: 22px;
	display: flex;
	justify-content: space-between;
	list-style: none;
}

nav a {
	color: #fff;
	text-decoration: none;
	padding: 0.5em;
}

nav a:hover {
	background-color: #fff;
	text-decoration: underline;
	color: #333;
}

main {
	margin: 2em auto;
	max-width: 1000px;
	padding: 0 1em;
}

h1 {
	font-size: 36px;
}

h2 {
	margin-bottom: 12px;
}

ul {
	list-style: disc;
	margin-left: 2em;
}

li {
	margin-bottom: 0.25em;
}

footer {
	background-color: #333;
	color: #fff;
	padding: 1.5em;
	text-align: center;
}

table {
  margin: 0 auto;
  border-collapse: collapse;
  border: 1px solid #ddd;
}

th, td {
  border: 1px solid #ddd;
  padding: 8px;
}

.back-to-top {
  position: fixed;
  bottom: 20px;
  right: 20px;
  font-size: 2em;
  background-color: #333;
  color: #fff;
  padding: 10px 15px;
  border-radius: 10 10 10px 10px;
  text-decoration: none;
}

.back-to-top:hover {
  background-color: #555;
}