body {
  max-width: 620px;
  margin: auto;
  font-family: Arial, sans-serif;
}

h4 {
  margin-bottom: 0;
}

#logo {
  max-width: 100%;
}

#content {
  padding: 10px;
}

.align-center {
  text-align: center;
}

#discs {
  padding: 10px;
  border: 1px solid #ccc;
}