body {
    font-family: "Segoe UI", sans-serif;
    background: #111;
    color: #fff;
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
  }
  
  .container {
    text-align: center;
  }
  
  h1 {
    margin-bottom: 10px;
    color: #0ff;
  }
  
  canvas {
    border: 5px solid #333;
    border-radius: 12px;
    background: #000;
    max-width: 100%;
    height: auto;
    margin-bottom: 10px;
  }
  
  .controls {
    margin-top: 10px;
  }
  
  select {
    padding: 8px;
    border-radius: 5px;
    border: none;
    font-size: 16px;
  }
  
  #canvasWrapper {
    width: 100%;
    max-width: 960px;
    aspect-ratio: 16 / 9;
    margin: auto;
    position: relative;
  }

  #cameraCanvas {
    width: 100%;
    height: 100%;
    display: block;
    border: 1px solid #ccc;
    background: #000;
  }

  #cameraSelect {
    margin: 1rem auto;
    display: block;
    padding: 6px 12px;
    font-size: 1rem;
  }
  #outputVideo {
    display: none;
  }