body {
    font-family: monospace;
    background-color: #111;
    color: #0f0;
    text-align: center;
    padding: 20px;
  }
  .reference {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin: 20px auto;
    max-width: 600px;
  }
  .ref-cell {
    border: 1px solid #0f0;
    padding: 5px 10px;
    min-width: 50px;
    text-align: center;
  }
  #morseOutput {
    margin: 20px;
    font-size: 1.5em;
  }
  #inputField {
    font-size: 1.2em;
    padding: 5px;
  }
  #submitBtn {
    font-size: 1em;
    padding: 6px 12px;
  }
  #timer {
    font-size: 1.5em;
    margin-top: 10px;
  }