/* style.css */
:root {
    --primary-color: #4CAF50;
    --secondary-color: #2196F3;
    --background-color: #f5f5f5;
    --text-color: #333;
  }
  
  body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
  }
  
  .navbar {
    background-color: white;
    padding: 1rem 2rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
  }
  
  .logo {
    display: flex;
    align-items: center;
  }
  
  .logo img {
    height: 40px;
    width: auto;
  }
  
  .nav-content {
    display: flex;
    gap: 2rem;
    align-items: center;
  }
  
  .nav-content a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: all 0.3s ease;
  }
  
  .nav-content a:hover {
    background-color: var(--background-color);
    color: var(--primary-color);
  }
  
  .container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
  }
  
  .main-header {
    text-align: center;
    margin-bottom: 2rem;
  }
  
  .upload-section {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  }
  
  .file-upload {
    border: 2px dashed #ccc;
    padding: 2rem;
    text-align: center;
    margin-bottom: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
  }
  
  .file-upload label {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    cursor: pointer;
  }
  
  .upload-icon {
    width: 64px;
    height: 64px;
    color: #666;
    transition: all 0.3s ease;
  }
  
  .file-upload:hover .upload-icon {
    color: var(--primary-color);
  }
  
  .file-upload.dragover {
    border-color: var(--primary-color);
    background-color: rgba(76, 175, 80, 0.1);
  }
  
  .file-upload.dragover .upload-icon {
    color: var(--primary-color);
  }
  
  .file-upload input[type="file"] {
    display: none;
  }
  
  .file-upload span {
    font-size: 1.1rem;
    color: #666;
  }
  
  .file-upload:hover span {
    color: var(--primary-color);
  }
  
  button {
    background-color: var(--primary-color);
    color: white;
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    width: 100%;
  }
  
  button:hover {
    background-color: #45a049;
  }
  
  .strategy-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-top: 2rem;
  }
  
  .step {
    margin-bottom: 2rem;
    padding: 1rem;
    border-radius: 8px;
    background-color: #f8f9fa;
  }
  
  .step h4 {
    margin: 0 0 1rem 0;
    color: #2c3e50;
  }
  
  .step-image {
    max-width: 300px;
    margin: 0 auto;
  }
  
  .step-image img {
    width: 100%;
    height: auto;
    border-radius: 4px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  }
  
  .step-description {
    margin-top: 1rem;
    text-align: center;
    color: #34495e;
  }
  
  .instructions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
  }
  
  .instruction-item {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  }
  
  .footer {
    background-color: white;
    padding: 2rem 1rem;
    text-align: center;
    margin-top: 2rem;
    box-shadow: 0 -2px 4px rgba(0,0,0,0.1);
  }
  
  .footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
  }
  
  .footer-section {
    flex: 1;
    min-width: 200px;
    text-align: center;
  }
  
  .footer-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    align-items: center;
  }
  
  .footer-links a {
    color: var(--text-color);
    text-decoration: none;
    transition: color 0.3s ease;
  }
  
  .footer-links a:hover {
    color: var(--primary-color);
  }
  
  .separator {
    color: #ccc;
  }
  
  @media (max-width: 768px) {
    .strategy-steps {
      grid-template-columns: 1fr;
    }
    
    .instructions {
      grid-template-columns: 1fr;
    }
    
    .navbar {
      padding: 1rem;
    }
    
    .nav-content {
      gap: 1rem;
    }
    
    .nav-content a {
      padding: 0.5rem;
    }
    
    .footer-content {
      flex-direction: column;
      gap: 1.5rem;
    }
    
    .footer-section {
      width: 100%;
    }
  }
  
  .privacy-content {
    max-width: 800px;
    margin: 2rem auto;
    padding: 0 1rem;
  }
  
  .privacy-content h1 {
    color: #333;
    margin-bottom: 1rem;
  }
  
  .privacy-content h2 {
    color: #444;
    margin: 2rem 0 1rem;
  }
  
  .privacy-content section {
    margin-bottom: 2rem;
  }
  
  .privacy-content ul {
    padding-left: 2rem;
    margin: 1rem 0;
  }
  
  .privacy-content li {
    margin: 0.5rem 0;
  }
  
  .privacy-content p {
    line-height: 1.6;
    margin: 1rem 0;
  }
  
  .error-message {
    color: #d32f2f;
    padding: 1rem;
    background-color: #ffebee;
    border-radius: 4px;
    margin: 1rem 0;
  }
  
  .no-strategy-message {
    color: #f57c00;
    padding: 1rem;
    background-color: #fff3e0;
    border-radius: 4px;
    margin: 1rem 0;
  }
  
  .loading-message {
    text-align: center;
    padding: 2rem;
  }
  
  .loading-subtitle {
    color: #666;
    font-size: 0.9rem;
    margin-top: 0.5rem;
  }
  
  .loading-spinner {
    margin: 2rem auto;
    width: 40px;
    height: 40px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
  }
  
  @keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
  }
  
  h1 {
    text-align: center;
    color: #2c3e50;
    margin: 2rem 0 2rem;
    font-size: 2.5rem;
  }
  
  .subtitle {
    text-align: center;
    color: #7f8c8d;
    margin-bottom: 2rem;
    font-size: 1.1rem;
  }