.container {
  width: 100%;
  max-width: 800px;
  margin: 2rem auto;
  padding: 0 1rem;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  gap: 1rem;
  flex-wrap: wrap;
}

.progress {
  flex: 1;
  min-width: 200px;
}

.progressBar {
  width: 100%;
  height: 8px;
  background-color: var(--ifm-color-emphasis-200);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 0.5rem;
}

.progressFill {
  height: 100%;
  background-color: var(--ifm-color-primary);
  transition: width 0.3s ease;
}

.progressText {
  font-size: 0.875rem;
  color: var(--ifm-color-emphasis-700);
}

.score {
  font-size: 1rem;
  font-weight: 600;
  color: var(--ifm-color-primary);
}

.questionCard {
  background: var(--ifm-card-background-color);
  border: 1px solid var(--ifm-color-emphasis-200);
  border-radius: 8px;
  padding: 2rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.questionHeader {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 2rem;
}

.questionText {
  font-size: 1.125rem;
  font-weight: 500;
  line-height: 1.5;
  margin: 0;
  flex: 1;
  color: var(--ifm-color-emphasis-900);
}

.difficulty {
  padding: 0.25rem 0.75rem;
  border-radius: 1rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: white;
  text-transform: uppercase;
  white-space: nowrap;
}

.options {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.option {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--ifm-background-color);
  border: 2px solid var(--ifm-color-emphasis-200);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: left;
  width: 100%;
}

.option:hover:not(:disabled) {
  border-color: var(--ifm-color-primary);
  background: var(--ifm-color-primary-lightest);
}

.option.selected {
  border-color: var(--ifm-color-primary);
  background: var(--ifm-color-primary-lightest);
}

.option.correct {
  border-color: #10b981;
  background: #d1fae5;
}

.option.incorrect {
  border-color: #ef4444;
  background: #fee2e2;
}

.option:disabled {
  cursor: not-allowed;
}

.optionLetter {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  background: var(--ifm-color-emphasis-200);
  border-radius: 50%;
  font-weight: 600;
  flex-shrink: 0;
}

.option.selected .optionLetter {
  background: var(--ifm-color-primary);
  color: white;
}

.option.correct .optionLetter {
  background: #10b981;
  color: white;
}

.option.incorrect .optionLetter {
  background: #ef4444;
  color: white;
}

.optionText {
  flex: 1;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--ifm-color-emphasis-900);
}

.submitButton {
  width: 100%;
  padding: 0.75rem 1.5rem;
  background: var(--ifm-color-primary);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.submitButton:hover:not(:disabled) {
  background: var(--ifm-color-primary-dark);
}

.submitButton:disabled {
  background: var(--ifm-color-emphasis-300);
  cursor: not-allowed;
}

.explanation {
  margin-top: 1.5rem;
  padding: 1rem 1.25rem;
  border-radius: 8px;
  border-left: 4px solid;
}

.correctExplanation {
  background: #d1fae5;
  border-left-color: #10b981;
}

.incorrectExplanation {
  background: #fee2e2;
  border-left-color: #ef4444;
}

.explanationHeader {
  font-weight: 600;
  margin-bottom: 0.5rem;
  font-size: 1rem;
}

.correctExplanation .explanationHeader {
  color: #065f46;
}

.incorrectExplanation .explanationHeader {
  color: #991b1b;
}

.explanation p {
  margin: 0;
  line-height: 1.5;
  color: var(--ifm-color-emphasis-800);
}

.navigation {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2rem;
}

.navButton {
  padding: 0.75rem 1.5rem;
  background: var(--ifm-background-color);
  color: var(--ifm-color-emphasis-700);
  border: 1px solid var(--ifm-color-emphasis-200);
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.navButton:hover:not(:disabled) {
  background: var(--ifm-color-emphasis-100);
  border-color: var(--ifm-color-emphasis-300);
}

.navButton:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Completion screen styles */
.completionCard {
  background: var(--ifm-card-background-color);
  border: 1px solid var(--ifm-color-emphasis-200);
  border-radius: 8px;
  padding: 3rem 2rem;
  text-align: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.completionTitle {
  font-size: 2rem;
  font-weight: 700;
  color: var(--ifm-color-primary);
  margin-bottom: 2rem;
}

.scoreDisplay {
  display: flex;
  justify-content: center;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 1rem;
}

.scoreNumber {
  font-size: 3rem;
  font-weight: 700;
  color: var(--ifm-color-emphasis-900);
}

.scorePercentage {
  font-size: 2rem;
  font-weight: 600;
  color: var(--ifm-color-primary);
}

.scoreMessage {
  font-size: 1.125rem;
  color: var(--ifm-color-emphasis-700);
  margin-bottom: 2rem;
  line-height: 1.5;
}

.answerSummary {
  margin: 2rem 0;
  padding: 1.5rem;
  background: var(--ifm-background-color);
  border-radius: 8px;
  border: 1px solid var(--ifm-color-emphasis-200);
}

.answerSummary h4 {
  margin: 0 0 1rem;
  font-size: 1.125rem;
  color: var(--ifm-color-emphasis-900);
}

.summaryItem {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0.25rem 0.5rem;
  padding: 0.25rem 0.75rem;
  background: var(--ifm-card-background-color);
  border-radius: 6px;
  border: 1px solid var(--ifm-color-emphasis-200);
}

.summaryIcon {
  font-weight: 700;
  font-size: 0.875rem;
}

.summaryIcon.correct {
  color: #10b981;
}

.summaryIcon.incorrect {
  color: #ef4444;
}

.summaryText {
  font-size: 0.875rem;
  color: var(--ifm-color-emphasis-700);
}

.restartButton {
  padding: 1rem 2rem;
  background: var(--ifm-color-primary);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 1.125rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.restartButton:hover {
  background: var(--ifm-color-primary-dark);
}

/* Mobile responsive styles */
@media (max-width: 768px) {
  .questionCard {
    padding: 1.5rem;
  }

  .questionText {
    font-size: 1rem;
  }

  .option {
    padding: 0.875rem 1rem;
  }

  .optionText {
    font-size: 0.9375rem;
  }

  .completionTitle {
    font-size: 1.5rem;
  }

  .scoreNumber {
    font-size: 2.5rem;
  }

  .scorePercentage {
    font-size: 1.5rem;
  }

  .summaryItem {
    margin: 0.25rem;
    padding: 0.25rem 0.5rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 0.5rem;
  }

  .questionCard {
    padding: 1rem;
  }

  .questionHeader {
    flex-direction: column;
    align-items: flex-start;
  }

  .difficulty {
    align-self: flex-start;
  }

  .navigation {
    flex-direction: column;
  }

  .navButton {
    width: 100%;
  }
}

/* Dark mode compatibility */
html[data-theme='dark'] .option {
  background: var(--ifm-background-surface-color);
}

html[data-theme='dark'] .option:hover:not(:disabled) {
  background: var(--ifm-color-primary-darkest);
}

html[data-theme='dark'] .option.selected {
  background: var(--ifm-color-primary-darkest);
}

html[data-theme='dark'] .option.correct {
  background: rgba(16, 185, 129, 0.2);
  border-color: #10b981;
}

html[data-theme='dark'] .option.incorrect {
  background: rgba(239, 68, 68, 0.2);
  border-color: #ef4444;
}

html[data-theme='dark'] .correctExplanation {
  background: rgba(16, 185, 129, 0.1);
}

html[data-theme='dark'] .incorrectExplanation {
  background: rgba(239, 68, 68, 0.1);
}