body {
  font-family: 'Segoe UI', sans-serif;
  background: linear-gradient(to right, #4facfe, #00f2fe);
  color: white;
  margin: 0;
  padding: 0;
}

.quiz-container {
  background: rgba(0, 0, 0, 0.2);
  padding: 30px;
  border-radius: 20px;
  max-width: 100%;
  width: 100%;
  max-width: 600px;
  margin: 30px auto;
  text-align: center;
  box-shadow: 0 0 15px rgba(255, 255, 255, 0.3);
  box-sizing: border-box;
}

#question {
  font-size: 22px;
  margin-bottom: 20px;
}

#options {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.option {
  background-color: white;
  color: #333;
  border: none;
  padding: 10px 20px;
  font-size: 16px;
  border-radius: 25px;
  cursor: pointer;
  transition: 0.3s;
  width: 100%;
  max-width: 400px;
  margin: 0 auto;
}

.option:hover {
  background-color: #e0e0e0;
}

.option.correct {
  background-color: green;
  color: white;
}

.option.wrong {
  background-color: red;
  color: white;
}

#timer {
  margin-top: 15px;
  font-size: 18px;
}

#explanation {
  margin-top: 15px;
  font-size: 16px;
  color: #eee;
}

#result {
  font-size: 24px;
  margin-top: 20px;
  font-weight: bold;
}

.hidden {
  display: none;
}

#next-btn {
  margin-top: 20px;
  padding: 10px 25px;
  font-size: 16px;
  border-radius: 25px;
  border: none;
  cursor: pointer;
}