body {
      font-family: 'Inter', sans-serif;
      margin: 0;
      padding: 0;
      background-color: #f0f4f8;
      color: #1f2937;
    }
    .header {
      display: flex;
      align-items: center;
      background-color: #1e3a8a;
      color: white;
      padding: 1.5rem;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
      border-bottom-left-radius: 1rem;
      border-bottom-right-radius: 1rem;
    }
    .header img {
      height: 4rem;
      margin-right: 1.5rem;
    }
    .header h1 {
      margin: 0;
      font-size: 1.75rem;
      font-weight: 700;
    }
    .container {
      max-width: 900px;
      margin: 2rem auto;
      padding: 2rem;
      background: #ffffff;
      border-radius: 1rem;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    }
    h2, .timer {
      text-align: center;
      color: #1e3a8a;
      font-weight: 600;
      margin-bottom: 1.5rem;
    }
    .timer {
      font-size: 1.25rem;
      font-weight: 700;
      color: #dc2626;
      padding: 0.5rem;
      background-color: #fef2f2;
      border-radius: 0.5rem;
     
    }
    form label {
      display: block;
      margin-bottom: 1rem;
      font-weight: 500;
      color: #374151;
    }
    form input[type="text"],form input[type="email"], form input[type="password"] {
      width: calc(100% - 2rem);
      padding: 0.75rem 1rem;
      margin-top: 0.5rem;
      border: 1px solid #d1d5db;
      border-radius: 0.5rem;
      font-size: 1rem;
      transition: border-color 0.3s, box-shadow 0.3s;
    }
    form input[type="text"]:focus, form input[type="password"]:focus {
      border-color: #3b82f6;
      box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.5);
      outline: none;
    }
    form button {
      background-color: #1e3a8a;
      color: white;
      border: none;
      padding: 0.75rem 2rem;
      border-radius: 0.5rem;
      font-size: 1.1rem;
      font-weight: 600;
      cursor: pointer;
      transition: background-color 0.3s;
      width: 100%;
      margin-top: 1.5rem;
    }
    form button:hover {
      background-color: #1e40af;
    }
    .question {
      display: none;
      opacity: 0;
      transform: translateX(-20px);
      transition: all 0.4s ease-in-out;
      margin-bottom: 2rem;
    }
    .question.active {
      display: block;
      opacity: 1;
      transform: translateX(0);
    }
    .options {
      list-style-type: none;
      padding: 0;
    }
    .options label {
      display: block;
      padding: 1rem;
      border: 1px solid #e5e7eb;
      border-radius: 0.5rem;
      margin-bottom: 0.75rem;
      cursor: pointer;
      transition: background-color 0.3s, border-color 0.3s, box-shadow 0.3s;
      background-color: #f9fafb;
    }
    input[type="radio"] {
      display: none;
    }
    input[type="radio"]:checked + label {
      background-color: #dbeafe;
      color: #1e3a8a;
      border-color: #3b82f6;
      font-weight: 600;
    }
    .nav-buttons {
      display: flex;
      justify-content: space-between;
      margin-top: 2rem;
    }
    .nav-buttons button, .submit-button button {
      padding: 0.75rem 2rem;
      background-color: #1e3a8a;
      color: white;
      border: none;
      border-radius: 0.5rem;
      font-size: 1rem;
      font-weight: 600;
      cursor: pointer;
      transition: background-color 0.3s;
    }
    .nav-buttons button:hover, .submit-button button:hover {
      background-color: #1e40af;
    }
    .nav-buttons button:disabled {
      background-color: #d1d5db;
      cursor: not-allowed;
    }
    .submit-button {
      display: flex;
      justify-content: center;
      margin-top: 2rem;
    }
    .submit-button button {
      background-color: #10b981;
    }
    .submit-button button:hover {
      background-color: #059669;
    }
    #result {
      margin-top: 2rem;
      text-align: center;
      font-size: 1.5rem;
      font-weight: 700;
      color: #1e3a8a;
    }
    /* Modal styles */
    .modal {
      display: none;
      position: fixed;
      z-index: 1000;
      left: 0;
      top: 0;
      width: 100%;
      height: 100%;
      overflow: auto;
      background-color: rgba(0,0,0,0.4);
      backdrop-filter: blur(5px);
    }
    .modal-content {
      background-color: #ffffff;
      margin: 15% auto;
      padding: 2rem;
      border: 1px solid #d1d5db;
      width: 80%;
      max-width: 450px;
      border-radius: 1rem;
      text-align: center;
      box-shadow: 0 8px 25px rgba(0,0,0,0.2);
    }
    .close-button {
      color: #6b7280;
      float: right;
      font-size: 2rem;
      font-weight: bold;
      line-height: 1;
    }
    .close-button:hover, .close-button:focus {
      color: #1f2937;
      text-decoration: none;
      cursor: pointer;
    }
    #errorMessageText {
      color: #dc2626;
      font-size: 1.1rem;
      font-weight: 500;
    }