body {
  font-family: Arial, sans-serif;
  background-color: #f0f2f5;
  color: #333;
  display: flex;
  justify-content: center;
  align-items: flex-start; /* Align to top for longer content */
  min-height: 100vh;
  margin: 0;
  padding: 20px;
  box-sizing: border-box;
}

#exam-container {
  background-color: #ffffff;
  padding: 25px;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  width: 100%;
  max-width: 800px;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid #e0e0e0;
  padding-bottom: 15px;
  margin-bottom: 20px;
}

header h1 {
  font-size: 1.8em;
  color: #0056b3; /* A professional blue */
  margin: 0;
}

#timer-container {
  font-size: 1.1em;
  font-weight: bold;
  color: #d9534f; /* A warning red for timer */
}

#question-header {
  margin-bottom: 10px;
  font-size: 0.9em;
  color: #555;
}

#question-text {
  font-size: 1.2em;
  font-weight: bold;
  margin-bottom: 20px;
  line-height: 1.6;
}

#options-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

#options-list li {
  background-color: #f9f9f9;
  border: 1px solid #ddd;
  border-radius: 5px;
  padding: 12px 15px;
  margin-bottom: 10px;
  cursor: pointer;
  transition: background-color 0.2s, border-color 0.2s;
  display: flex;
  align-items: center;
}

#options-list li:hover {
  background-color: #e9ecef;
  border-color: #c8ced3;
}

#options-list li.selected {
  background-color: #cce5ff; /* Light blue for selected */
  border-color: #007bff;
  font-weight: bold;
}

#options-list input[type="radio"] {
  margin-right: 10px;
  transform: scale(1.2); /* Make radio buttons slightly larger */
}

#navigation-controls {
  display: flex;
  justify-content: space-between;
  margin-top: 25px;
  padding-top: 20px;
  border-top: 1px solid #e0e0e0;
}

.nav-btn {
  padding: 10px 20px;
  font-size: 1em;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  background-color: #007bff;
  color: white;
  transition: background-color 0.2s;
}

.nav-btn:hover:not(:disabled) {
  background-color: #0056b3;
}

.nav-btn:disabled {
  background-color: #c0c0c0;
  cursor: not-allowed;
}

.nav-btn.finish {
  background-color: #28a745; /* Green for finish */
}
.nav-btn.finish:hover:not(:disabled) {
  background-color: #1e7e34;
}

#progress-bar-container {
  width: 100%;
  background-color: #e0e0e0;
  border-radius: 5px;
  margin-top: 20px;
  height: 10px;
}

#progress-bar {
  height: 100%;
  width: 0%;
  background-color: #007bff;
  border-radius: 5px;
  transition: width 0.3s ease-in-out;
}

#results-area {
  padding: 20px;
  border: 1px solid #ddd;
  border-radius: 5px;
  margin-top: 20px;
  background-color: #f9f9f9;
}

#results-area h2 {
  color: #0056b3;
  margin-top: 0;
}

#results-area strong {
  font-size: 1.2em;
}

#pass-fail-message {
  font-weight: bold;
  font-size: 1.1em;
  margin: 10px 0;
}
#pass-fail-message.pass {
  color: #28a745;
}
#pass-fail-message.fail {
  color: #d9534f;
}

#review-area {
  margin-top: 20px;
  padding: 15px;
  border: 1px solid #ccc;
  border-radius: 5px;
}
#review-content .review-item {
  margin-bottom: 20px;
  padding-bottom: 15px;
  border-bottom: 1px dashed #eee;
}
#review-content .review-item p {
  margin: 5px 0;
}
.correct-answer {
  color: green;
  font-weight: bold;
}
.incorrect-answer {
  color: red;
  font-weight: bold;
  text-decoration: line-through;
}
.user-choice {
 
}

@media (max-width: 600px) {
  header {
    flex-direction: column;
    align-items: flex-start;
  }
  header h1 {
    font-size: 1.5em;
    margin-bottom: 10px;
  }
  #timer-container {
    font-size: 1em;
  }
  .nav-btn {
    padding: 8px 15px;
    font-size: 0.9em;
  }
  #navigation-controls {
    flex-wrap: wrap; /* Allow buttons to wrap on small screens */
  }
  #navigation-controls button {
    margin-bottom: 5px; /* Add space if they wrap */
  }
}
.intro-text {
  margin-bottom: 25px;
  padding: 15px;
  background-color: #f8f9fa;
  border-radius: 5px;
  border: 1px solid #e9ecef;
  font-size: 1.05em;
  line-height: 1.6;
}
.intro-text p {
  margin-bottom: 10px;
}
.intro-text a {
  color: #0056b3;
  text-decoration: none;
}
.intro-text a:hover {
  text-decoration: underline;
}