body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: #202124;
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
}
h1 {
  color: #202124;
  font-size: 28px;
  font-weight: 400;
  margin-bottom: 20px;
}
.question {
  margin-bottom: 20px;
  border: 1px solid #dadce0;
  border-radius: 8px;
  padding: 24px;
}
.question h2 {
  font-size: 16px;
  font-weight: 500;
  margin-top: 0;
}
input[type="radio"],
input[type="text"] {
  margin-bottom: 10px;
}
textarea {
  width: 100%;
  height: 100px;
  margin-bottom: 10px;
}
button {
  background-color: #1a73e8;
  color: white;
  border: none;
  padding: 10px 24px;
  font-size: 14px;
  border-radius: 4px;
  cursor: pointer;
}
button:hover {
  background-color: #1765cc;
}
#results {
  margin-top: 20px;
  display: none;
}
.correct {
  color: #34a853;
}
.incorrect {
  color: #ea4335;
}
.explanation {
  margin-top: 10px;
  padding: 10px;
  background-color: #f1f3f4;
  border-radius: 4px;
}