:root {
      --primary-color: #00bcd4;
      --secondary-color: #1a237e;
      --text-color: #e0f7fa;
      --bg-color: #0d1226;
      --font-mono: 'Roboto Mono', 'Courier New', monospace;
    }
    body {
      margin: 0;
      font-family: var(--font-mono);
      background: var(--bg-color);
      color: var(--text-color);
      text-align: center;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 100vh;
      overflow: hidden;
      padding: 10px;
    }
    h2 {
      text-transform: uppercase;
      letter-spacing: 2px;
      font-size: 1.5em;
      margin-top: 10px;
      text-shadow: 0 0 5px var(--primary-color);
    }
    #main-container {
      display: flex;
      flex-direction: column;
      align-items: center;
      width: 100%;
      max-width: 900px;
      padding: 10px;
    }
    #camera-container {
      position: relative;
      width: 90%;
      max-width: 300px;
      aspect-ratio: 3/4;  /* keeps vertical orientation */
      margin: 0 auto;
      border: 2px solid var(--primary-color);
      border-radius: 12px;
      box-shadow: 0 0 20px 5px rgba(0, 188, 212, 0.4);
      background: var(--secondary-color);
    }
    #camera-feed {
      display: block;
      width: 100%;
      height: 100%;
      border-radius: 10px;
      transform: scaleX(-1);
    }
    #controls-panel {
      display: flex;
      justify-content: center;
      gap: 15px;
      margin-top: 20px;
      flex-wrap: wrap;
    }
    .control-btn {
      background: var(--primary-color);
      color: var(--secondary-color);
      border: none;
      padding: 10px 20px;
      border-radius: 5px;
      cursor: pointer;
      font-family: var(--font-mono);
      font-size: 0.9em;
      transition: background-color 0.3s, transform 0.1s;
      text-transform: uppercase;
      font-weight: bold;
    }
    .control-btn:hover {
      background: #00e5ff;
      transform: scale(1.05);
    }
    .data-box {
      background: rgba(0, 188, 212, 0.1);
      border: 1px solid var(--primary-color);
      padding: 10px;
      border-radius: 8px;
      box-shadow: 0 0 8px rgba(0, 188, 212, 0.3);
      margin-top: 15px;
      min-width: 250px;
    }
    .data-box h3 {
      margin: 0;
      font-size: 0.9em;
      text-transform: uppercase;
    }
    .data-box span {
      font-size: 1.5em;
      font-weight: bold;
      text-shadow: 0 0 5px var(--text-color);
      word-wrap: break-word;
    }
    #keyboard-panel {
      display: flex;
      flex-direction: column;
      align-items: center;
      margin-top: 20px;
      width: 100%;
    }
    #keyboard-input {
      width: 90%;
      max-width: 500px;
      padding: 10px;
      border-radius: 5px;
      border: 2px solid var(--primary-color);
      background: var(--secondary-color);
      color: var(--text-color);
      font-family: var(--font-mono);
      font-size: 1em;
      text-align: center;
      margin-bottom: 10px;
    }