:root {
      --primary-color: #1a365d;
      --secondary-color: #2a69ac;
      --accent-color: #c53030;
      --light-bg: #f7fafc;
      --input-border: #cbd5e0;
    }
    
    body {
      background-color: #edf2f7;
      font-family: 'Segoe UI', Roboto, system-ui, sans-serif;
      color: #2d3748;
      line-height: 1.5;
    }
    
    .navbar {
      background-color: var(--primary-color) !important;
      border-bottom: 4px solid var(--secondary-color);
    }
    
    .main-card {
      border: none;
      border-top: 4px solid var(--secondary-color);
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    }
    
    .form-section {
      background: white;
      border-radius: 6px;
      padding: 1.75rem;
      margin-bottom: 1.5rem;
      border: 1px solid var(--input-border);
    }
    
    .section-title {
      font-weight: 600;
      color: var(--primary-color);
      margin-bottom: 1.25rem;
      padding-bottom: 0.5rem;
      border-bottom: 1px solid var(--input-border);
    }
    
    .form-label {
      font-weight: 600;
      color: #4a5568;
      font-size: 0.9375rem;
      margin-bottom: 0.5rem;
    }
    
    .form-control, .form-select {
      height: 2.75rem;
      border-radius: 4px;
      border: 1px solid var(--input-border);
      padding: 0.5rem 0.75rem;
      font-size: 0.9375rem;
    }
    
    .form-select {
      background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23343a40' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
      background-repeat: no-repeat;
      background-position: right 0.75rem center;
      background-size: 16px 12px;
    }
    
    .subject-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1rem;
    }
    
    .btn-submit {
      background-color: var(--secondary-color);
      padding: 0.75rem 2.5rem;
      font-weight: 600;
      letter-spacing: 0.5px;
      border: none;
    }
    
    .btn-submit:hover {
      background-color: #1e4e8c;
    }
    
    .required-asterisk {
      color: var(--accent-color);
    }
    
    .optional-badge {
      background-color: #e2e8f0;
      color: #4a5568;
      font-size: 0.75rem;
      padding: 0.25rem 0.5rem;
      border-radius: 4px;
      margin-left: 0.5rem;
    }
    
    @media (max-width: 992px) {
      .subject-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    
    @media (max-width: 768px) {
      .subject-grid {
        grid-template-columns: 1fr;
      }
    }
  
    /* Additional styles for header buttons */
    .header-buttons {
      display: flex;
      gap: 10px;
      margin-left: auto;
    }
    
    .btn-home, .btn-paid {
      display: flex;
      align-items: center;
      gap: 5px;
      padding: 8px 16px;
      border-radius: 6px;
      text-decoration: none;
      font-weight: 500;
      transition: all 0.3s ease;
    }
    
    .btn-home {
      background: rgba(255, 255, 255, 0.2);
      color: white;
      border: 1px solid rgba(255, 255, 255, 0.3);
    }
    
    .btn-home:hover {
      background: rgba(255, 255, 255, 0.3);
      color: white;
      text-decoration: none;
    }
    
    .btn-paid {
      background: #28a745;
      color: white;
      border: 1px solid #28a745;
    }
    
    .btn-paid:hover {
      background: #218838;
      color: white;
      text-decoration: none;
      transform: translateY(-1px);
    }
    
    /* Responsive adjustments */
    @media (max-width: 768px) {
      .header-buttons {
        gap: 8px;
      }
      
      .btn-home, .btn-paid {
        padding: 6px 12px;
        font-size: 14px;
      }
    }