body {
    font-family: 'Segoe UI', sans-serif;
    background: #000;
    color: #fff;
    text-align: center;
    padding: 2rem;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
  }
  
  .container {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 0 30px rgba(255, 255, 255, 0.05);
    display: inline-block;
    max-width: 90%;
  }
  
  h1 {
    font-size: 2rem;
    margin-bottom: 1rem;
  }
  
  input {
    width: 280px;
    padding: 0.6rem;
    margin-bottom: 1rem;
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    outline: none;
  }
  
  input::placeholder {
    color: #aaa;
  }
  
  button {
    padding: 0.6rem 1.2rem;
    margin-top: 1rem;
    cursor: pointer;
    background: rgba(0, 123, 255, 0.8);
    color: white;
    border: none;
    border-radius: 10px;
    transition: background 0.2s ease;
    font-weight: bold;
  }
  
  button:hover {
    background: rgba(0, 123, 255, 1);
  }
  
  #qrcode {
    margin-top: 2rem;
    display: flex;
    justify-content: center;
    align-items: center;
  }