body {
  background-color: white;
  color: #333333;
  font-family: Arial, Helvetica, sans-serif;
  margin: 0;
  line-height: 1.5;
}

a {
  color: #333333;
}

.header {
  border-bottom: 1px solid #cccccc;
  padding: 20px;
  overflow: hidden;
}

.logo {
  float: left;
  font-size: 24px;
  font-weight: bold;
  text-decoration: none;
  margin-top: 4px;
}

.menu {
  float: right;
}

.button {
  display: inline-block;
  padding: 8px 16px;
  border: 1px solid #333333;
  border-radius: 4px;
  background-color: white;
  color: #333333;
  text-decoration: none;
  font-size: 14px;
}

.button:hover {
  background-color: #eeeeee;
}

.active {
  background-color: #333333;
  color: white;
}

.active:hover {
  background-color: #555555;
}

.content {
  max-width: 600px;
  margin: 40px auto;
  padding: 0 20px;
}

.footer {
  border-top: 1px solid #cccccc;
  padding: 20px;
  font-size: 12px;
  color: #777777;
  text-align: center;
}