body {
  max-width: 1000px;
  margin: auto;
}

.header {
  background-color: #a0a0a0;
  text-align: center;
  margin: 0 auto;
}

.header a {
  padding: 0 12px;
}

.flavortext {
  font-style: italic;
}

.box {
  top: 3px;
  display: inline-block;
  position: relative;
  border: 1px solid black;
  height: 2ex;
  width: 0.5em;
}

.grid {
  border-collapse: collapse;
}

.grid td {
  height: 30px;
  width: 30px;
  background-color: white;
  border: 1px solid black;
  text-align: center;
}

.grid td.filled {
  background-color: black;
}

ul.with-header:before{
  content: attr(header-text);
  font-weight:bold;
  margin-left: -20px;
}

.hint {
  background-color: black;
}

.hint:active {
  background-color: transparent;
}