body {
      box-sizing: border-box;
      background: linear-gradient(135deg, #0b34ee 0%, #4b97a2 50%, #9495fb 100%);
      min-height: 100%;
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    }
    
    .card {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    }
    
    .page {
      display: none;
    }
    
    .page.active {
      display: block;
      animation: fadeIn 0.5s ease-in;
    }
    
    @keyframes fadeIn {
      from { opacity: 0; transform: translateY(20px); }
      to { opacity: 1; transform: translateY(0); }
    }
    
    .radio-custom {
      appearance: none;
      width: 20px;
      height: 20px;
      border: 2px solid #667eea;
      border-radius: 50%;
      outline: none;
      cursor: pointer;
      position: relative;
      flex-shrink: 0;
    }
    
    .radio-custom:checked::before {
      content: '';
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 12px;
      height: 12px;
      background: #667eea;
      border-radius: 50%;
    }
    
    .radio-label {
      cursor: pointer;
      transition: all 0.3s ease;
      padding: 15px 20px;
      border-radius: 12px;
      border: 2px solid transparent;
    }
    
    .radio-label:hover {
      background: rgba(102, 126, 234, 0.1);
      border-color: #667eea;
      transform: translateX(5px);
    }
    
    input[type="text"] {
      transition: all 0.3s ease;
    }
    
    input[type="text"]:focus {
      transform: translateY(-2px);
      box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
    }
    
    .btn {
      transition: all 0.3s ease;
      font-weight: bold;
      padding: 14px 28px;
      border-radius: 12px;
      font-size: 16px;
    }
    
    .btn:hover {
      transform: translateY(-3px);
      box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
    }
    
    .btn-primary {
      background: linear-gradient(135deg, #0b34ee 0%, #4b97a2 50%, #9495fb 100%);
      color: white;
    }
    
    .btn-secondary {
      background: white;
      color: #667eea;
      border: 2px solid #667eea;
    }
    
    .header-icon {
      animation: float 3s ease-in-out infinite;
    }
    
    @keyframes float {
      0%, 100% { transform: translateY(0px); }
      50% { transform: translateY(-10px); }
    }
    
    .question-number {
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      color: white;
      width: 45px;
      height: 45px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      font-size: 18px;
      flex-shrink: 0;
    }
    
    .progress-bar {
      height: 8px;
      background: rgba(102, 126, 234, 0.2);
      border-radius: 10px;
      overflow: hidden;
    }
    
    .progress-fill {
      height: 100%;
      background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
      transition: width 0.5s ease;
    }
    
    .progress-text {
      color: white;
      font-weight: bold;
      font-size: 14px;
      text-align: center;
      margin-top: 8px;
    }
    
    .divider {
      height: 2px;
      background: linear-gradient(90deg, transparent, #667eea, transparent);
      margin: 25px 0;
    }