body {
  font-family: Arial, sans-serif;
  background-color: #ef228c;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.quiz-container {
  background: #fff;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
  max-width: 600px;
  width: 100%;
}

h1 {
  text-align: center;
  color: #333;
}

.question {
  margin-bottom: 20px;
}

.radio-container {
  display: block;
  position: relative;
  padding-left: 35px;
  margin-bottom: 12px;
  cursor: pointer;
  font-size: 18px;
}

.radio-container input {
  position: absolute;
  opacity: 0;
  cursor: pointer;
}

.checkmark {
  position: absolute;
  top: 0;
  left: 0;
  height: 25px;
  width: 25px;
  background-color: orange;
  border-radius: 50%;
}

.radio-container input:checked ~ .checkmark {
  background-color: #4caf50;
}

.radio-container input:checked.incorrect ~ .checkmark {
  background-color: red;
}

.checkmark:after {
  content: "";
  position: absolute;
  display: none;
}

.radio-container input:checked ~ .checkmark:after {
  display: block;
}

.radio-container .checkmark:after {
  top: 9px;
  left: 9px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: white;
}

.feedback {
  display: none;
  margin-left: 10px;
  font-weight: bold;
}

.correct {
  color: green;
}

.incorrect {
  color: red;
}