* { 
    box-sizing: border-box; 
    margin: 0; 
    padding: 0; 
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; 
  }
  
  body { 
    background-color: #f4f6f9; 
    display: flex; 
    justify-content: center; 
    align-items: center; 
    min-height: 100vh; 
    padding: 20px; 
  }
  
  .container { 
    background: #fff; 
    border-radius: 12px; 
    box-shadow: 0 4px 20px rgba(0,0,0,0.08); 
    width: 100%; 
    max-width: 900px; 
    display: flex; 
    flex-wrap: wrap; 
    overflow: hidden; 
  }
  
  .form-section, .qr-section { 
    padding: 30px; 
    flex: 1; 
    min-width: 300px; 
  }
  
  .form-section { 
    border-right: 1px solid #eee; 
  }
  
  h2 { 
    font-size: 1.2rem; 
    margin-bottom: 20px; 
    color: #333; 
  }
  
  .form-group { 
    margin-bottom: 16px; 
  }
  
  label { 
    display: block; 
    font-size: 0.9rem; 
    font-weight: 600; 
    margin-bottom: 6px; 
    color: #444; 
  }
  
  label span { 
    color: #e53e3e; 
  }
  
  input { 
    width: 100%; 
    padding: 10px 12px; 
    border: 1px solid #e2e8f0; 
    border-radius: 8px; 
    font-size: 0.95rem; 
    outline: none; 
    transition: 0.2s; 
  }
  
  input:focus { 
    border-color: #3182ce; 
    box-shadow: 0 0 0 3px rgba(49,130,206,0.15); 
  }
  
  .note { 
    font-size: 0.75rem; 
    color: #718096; 
    margin-top: 4px; 
  }
  
  .btn-submit { 
    width: 100%; 
    padding: 12px; 
    background: #3182ce; 
    color: #fff; 
    border: none; 
    border-radius: 8px; 
    font-weight: 600; 
    font-size: 1rem; 
    cursor: pointer; 
    margin-top: 10px; 
  }
  
  .btn-submit:hover { 
    background: #2b6cb0; 
  }
  
  .qr-section { 
    display: flex; 
    flex-direction: column; 
    align-items: center; 
    justify-content: center; 
    background: #fafafa; 
    text-align: center; 
  }
  
  .qr-card { 
    background: #fff; 
    padding: 20px; 
    border-radius: 12px; 
    box-shadow: 0 2px 10px rgba(0,0,0,0.05); 
    max-width: 320px; 
    width: 100%; 
    display: flex; 
    flex-direction: column; 
    align-items: center;
  }
  
  .qr-info { 
    margin-top: 15px; 
    font-size: 0.85rem; 
    color: #4a5568; 
    line-height: 1.5; 
    text-align: center; 
  }
  
  .qr-info strong { 
    color: #1a202c; 
  }
  
  .placeholder-text { 
    color: #a0aec0; 
    font-size: 0.95rem; 
  }