/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 
      Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    font-size: 16px;
    line-height: 1.5;
    color: #333;
    background-color: #f9f9f9;
  }
  
  h1, h2, h3, h4, h5, h6 {
    margin-bottom: 0.5em;
    font-weight: 600;
    line-height: 1.2;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.75rem;
  }
  
  h3 {
    font-size: 1.5rem;
  }
  
  p {
    margin-bottom: 1rem;
  }
  
  a {
    color: #3498db;
    text-decoration: none;
  }
  
  a:hover {
    text-decoration: underline;
  }
  
  button {
    cursor: pointer;
  }
  
  /* Utility classes */
  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
  }
  
  .text-center {
    text-align: center;
  }
  
  .mb-1 {
    margin-bottom: 0.5rem;
  }
  
  .mb-2 {
    margin-bottom: 1rem;
  }
  
  .mb-3 {
    margin-bottom: 1.5rem;
  }
  
  .mb-4 {
    margin-bottom: 2rem;
  }
  
  /* Form elements */
  input, textarea, select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
    font-family: inherit;
  }
  
  input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
  }
  
  label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
  }
  
  /* Button styles */
  .btn {
    display: inline-block;
    background-color: #3498db;
    color: white;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    transition: background-color 0.2s, transform 0.1s;
  }
  
  .btn:hover {
    background-color: #2980b9;
    text-decoration: none;
  }
  
  .btn:active {
    transform: translateY(1px);
  }
  
  .btn-secondary {
    background-color: #95a5a6;
  }
  
  .btn-secondary:hover {
    background-color: #7f8c8d;
  }
  
  /* Card style */
  .card {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    overflow: hidden;
  }
  
  .card-header {
    padding: 1rem;
    border-bottom: 1px solid #eee;
  }
  
  .card-body {
    padding: 1rem;
  }
  
  /* Responsive adjustments */
  @media (max-width: 768px) {
    h1 {
      font-size: 1.75rem;
    }
    
    h2 {
      font-size: 1.5rem;
    }
    
    h3 {
      font-size: 1.25rem;
    }
  }