body {
  font-family: Arial, Helvetica, sans-serif;
  background: #222222;
}

tr {
  line-height: 48px;
  color: white;
}

tr:nth-child(odd) {
  background: #5555aa;
}

tr:nth-child(even) {
  background: #4444aa;
}

td {
  padding-left: 20px;
  padding-right: 20px;
}

table {
  margin-left: auto;
  margin-right: auto;
  border-collapse: collapse;
  }

h1 {
  text-align: center;
  color: white;
  }

p {
  text-align: center;
  }

 /* unvisited link */
a:link {
  color: white;
  text-decoration: none;
}

/* visited link */
a:visited {
  color: white;
  text-decoration: none;
}

/* mouse over link */
a:hover {
  color: blue;
  text-decoration: none;
}

/* selected link */
a:active {
  color: blue;
  text-decoration: none;
}

iframe {
  display: block;
  margin: 0 auto;
}