body {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  padding: 0px 0;
}

.quiz-container {
  max-width: 800px;
  margin: 50px auto;
}

.quiz-card {
  background: white;
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
  padding: 20px;
  text-align: center;
}

.timer {
  font-size: 2.0rem;
  font-weight: bold;
  color: #667eea;
  text-align: center;
  margin: 10px 0;
}

.timer.warning {
  color: #dc3545;
  animation: pulse 1s infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.6;
  }
}

.question-card {
  background: #f8f9fa;
  border-radius: 10px;
  padding: 25px;
  margin: 20px 0;
}

.question-number {
  font-size: 0.9rem;
  color: #6c757d;
  font-weight: 600;
}

.question-text {
  font-size: 1.2rem;
  font-weight: 600;
  color: #333;
  margin: 10px 0;
}

.answer-option {
  background: white;
  border: 2px solid #e9ecef;
  border-radius: 8px;
  padding: 10px 15px;
  margin: 10px 0;
  cursor: pointer;
  transition: all 0.3s ease;
}

.answer-option:hover {
  border-color: #667eea;
  background: #f0f2ff;
}

.answer-option.selected {
  border-color: #667eea;
  background: #667eea;
  color: white;
}

.answer-option.correct {
  border-color: #076f1f;
  background: #076f1f;
  color: white;
}

.lead {
  font-size: medium;
  color: #7421c9;
  font-weight: 600;
}

.answer-option.incorrect {
  border-color: #dc3545;
  background: #dc3545;
  color: white;
}

.btn-start {
  font-size: 1.2rem;
  padding: 15px 50px;
  border-radius: 50px;
}

.progress-bar-custom {
  height: 8px;
  border-radius: 10px;
  margin: 20px 0;
}

.results-card {
  text-align: center;
}

.score-display {
  font-size: 4rem;
  font-weight: bold;
  color: #667eea;
}

.hidden {
  display: none;
}