* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', sans-serif;
  }
  
  body {
    background: #f3f4f6;
    display: flex;
    justify-content: center;
    padding: 2rem;
  }
  
  .main-container {
    width: 100%;
    max-width: 700px;
    display: flex;
    flex-direction: column;
    gap: 2rem;
  }
  
  h1 {
    text-align: center;
    color: #333;
    font-size: 2rem;
    margin-bottom: 1rem;
  }
  
  .card {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
  }
  
  .card h2 {
    margin-bottom: 1rem;
    font-size: 1.3rem;
    color: #444;
  }
  
  .form {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
  }
  
  .form input {
    padding: 0.6rem 1rem;
    font-size: 1rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    transition: border-color 0.2s;
  }
  
  .form input:focus {
    outline: none;
    border-color: #6366f1;
  }
  
  .form button {
    margin-top: 0.5rem;
    padding: 0.75rem;
    background-color: #6366f1;
    color: white;
    border: none;
    font-weight: bold;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.2s;
  }
  
  .form button:hover {
    background-color: #4f46e5;
  }
  
  @media (max-width: 500px) {
    .main-container {
      padding: 1rem;
    }
  }