/* Theme Starter CSS v3.2.1 */
      :root {
        --primary-color: #3498db;
        --secondary-color: #2ecc71;
        --font-family: 'Segoe UI', Tahoma, Geneva, sans-serif;
        --border-radius: 8px;
        --transition-speed: 0.3s;
      }
      
      * { margin: 0; padding: 0; box-sizing: border-box; }
      
      body {
        font-family: var(--font-family);
        line-height: 1.6;
        color: #333;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      }
      
      .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
      .btn { display: inline-block; padding: 12px 24px; border-radius: var(--border-radius); }
      .btn-primary { background: var(--primary-color); color: white; }
      .btn-secondary { background: var(--secondary-color); color: white; }
      
      /* Grid System */
      .row { display: flex; flex-wrap: wrap; margin: 0 -15px; }
      .col { flex: 1; padding: 0 15px; }
      .col-6 { flex: 0 0 50%; max-width: 50%; }
      .col-4 { flex: 0 0 33.333%; max-width: 33.333%; }
      .col-3 { flex: 0 0 25%; max-width: 25%; }
      
      /* Typography */
      h1, h2, h3, h4, h5, h6 { margin-bottom: 1rem; font-weight: 600; }
      h1 { font-size: 2.5rem; }
      h2 { font-size: 2rem; }
      h3 { font-size: 1.75rem; }
      
      /* Cards */
      .card { background: white; border-radius: var(--border-radius); box-shadow: 0 4px 6px rgba(0,0,0,0.1); }
      .card-header { padding: 1rem; border-bottom: 1px solid #eee; }
      .card-body { padding: 1.5rem; }
      
      /* Forms */
      .form-group { margin-bottom: 1rem; }
      .form-control { width: 100%; padding: 10px 15px; border: 1px solid #ddd; border-radius: var(--border-radius); }
      .form-control:focus { outline: none; border-color: var(--primary-color); }
      
      /* Utilities */
      .text-center { text-align: center; }
      .mt-1 { margin-top: 0.5rem; }
      .mt-2 { margin-top: 1rem; }
      .mb-1 { margin-bottom: 0.5rem; }
      .mb-2 { margin-bottom: 1rem; }
      .p-1 { padding: 0.5rem; }
      .p-2 { padding: 1rem; }
      
      @media (max-width: 768px) {
        .col-6, .col-4, .col-3 { flex: 0 0 100%; max-width: 100%; }
        h1 { font-size: 2rem; }
      }