html, body {
  height: 100%;
  width: 100%;
  background-color: #333;
  color: #0CA;
}

.element {
  padding: 0.5em;
}

.box {
  margin: 1em;
  padding: 0.5em;
  border-radius: 1em;
  border: 2px solid #0A8;
  width: 80%;
  margin-left: auto;
  margin-right: auto;
}

h1 {
  font-size: 14pt;
  text-align: center;
  color: #FFF;
  font-family: sans-serif;
}

button {
  background-color: #333;
  color: #0F3;
  border: 2px solid #0A8;
  font-size: 1.5em;
  padding: 0.5em;
  border-radius: 0.5em;
}

input[type=checkbox] {
  border: 2px solid #0A8;
  background-color: #333;
  color: #0F3;
}

input[type=number] {
  border-top: 0;
  border-left: 0;
  border-right: 0;
  border-bottom: 2px solid #0A8;
  background-color: #333;
  color: #0F3;
  width: 3em;
}

a:link, a:visited {
    color: #FFF;
    text-decoration: underline;
}

a:active, a:hover {
    color: #FFF;
    text-decoration: none;
}

table, tr, td {
  border: 0;
  margin: 0;
  padding: 0;
  text-align: center;
}
table {
  width: 100%;
}
td {
  width: 50%;
}