.topic-button {
  width: 100%;
  border: none;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  cursor: pointer;
  transition: 0.2s;
  text-align: left;
  box-shadow: var(--shadow-sm);
}

.topic-button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.topic-card {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.topic-icon {
  font-size: 32px;
}

.topic-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
}

.topic-meta {
  color: var(--color-text-muted);
  font-size: 14px;
  margin-top: 4px;
}

.quiz-card {
  background: var(--color-surface);
  padding: 20px;
  border-radius: var(--radius-lg);
  margin-bottom: 20px;
  box-shadow: var(--shadow-md);
}

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

.personal-best {
  display: inline-block;
  margin: 4px 0 16px;
  padding: 10px 18px;
  font-size: 1.15rem;
  font-weight: 700;
  color: #15803d;
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.option {
  display: block;
  width: 100%;
  margin-bottom: 10px;
  padding: 14px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  cursor: pointer;
  text-align: left;
  transition: 0.2s;
  font-size: 16px;
}

.option:hover {
  border-color: var(--color-primary);
  background: rgba(37, 99, 235, 0.05);
}

.correct {
  background: rgba(34, 197, 94, 0.12) !important;
  border-color: var(--color-success) !important;
  color: var(--color-success);
}

.wrong {
  background: rgba(239, 68, 68, 0.12) !important;
  border-color: var(--color-danger) !important;
  color: var(--color-danger);
}

#quiz-progress {
  display: none;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  margin-bottom: var(--space-lg);
  box-shadow: var(--shadow-sm);
  font-weight: 600;
}

.progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.progress-bar {
  width: 100%;
  height: 10px;
  background: var(--color-border);
  border-radius: 999px;
  overflow: hidden;
  margin-top: var(--space-sm);
}

#quiz-progress-fill {
  width: 0%;
  height: 100%;
  background: var(--color-primary);
  transition: width 0.25s ease;
}

.question-limit-buttons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 16px 0 28px;
}

#quiz-topic-title {
  font-size: 32px;
  font-weight: 700;
}

.question-limit {
  flex: 1;
  padding: 12px;
  border: 2px solid #e5e7eb;
  border-radius: 10px;
  background: white;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.question-limit:hover {
  background: #f8fafc;
}

.question-limit.active {
  background: #eff6ff;
  border-color: #2563eb;
  color: #2563eb;
}

#quiz-settings {
  margin: 24px 0;
}

.quiz-settings-card {
  background: white;
  border-radius: 16px;
  padding: 28px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.quiz-settings-header h2 {
  margin: 0;
  font-size: 28px;
}

.quiz-settings-header p {
  margin-top: 8px;
  margin-bottom: 28px;
  color: #6b7280;
  font-size: 15px;
}

#start-quiz-button {
  width: 100%;
  margin-top: 28px;
  padding: 16px;
  border: none;
  border-radius: 12px;
  background: var(--color-primary);
  color: white;
  font-size: 17px;
  font-weight: 600;
  cursor: pointer;
  transition: 0.2s;
}

#start-quiz-button:hover {
  transform: translateY(-1px);
  filter: brightness(1.05);
}

.setting-row {
  display: flex;
  justify-content: space-between;
  align-items: center;

  margin: 28px 0;
}

.setting-row strong {
  display: block;
  font-size: 16px;
}

.setting-row p {
  margin-top: 6px;
  margin-bottom: 0;

  color: var(--color-text-muted);
  font-size: 14px;
}

.switch {
  position: relative;
  display: inline-block;
  width: 54px;
  height: 30px;
}

.switch input {
  display: none;
}

.slider {
  position: absolute;
  inset: 0;
  cursor: pointer;
  background: #d1d5db;
  border-radius: 999px;
  transition: 0.25s;
}

.slider::before {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  left: 4px;
  top: 4px;
  background: white;
  border-radius: 50%;
  transition: 0.25s;
}

.switch input:checked + .slider {
  background: var(--color-primary);
}

.switch input:checked + .slider::before {
  transform: translateX(24px);
}

.reading-text {
  margin-bottom: 24px;
  padding: 18px 20px;

  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
}

.reading-label {
  margin-bottom: 10px;

  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-primary);
}

.reading-text p {
  margin: 0;

  font-size: 0.95rem;
  font-weight: 400;
  line-height: 1.7;
  color: var(--color-text);
}

.topic-category {
  grid-column: 1 / -1;
  margin: 32px 0 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-border);
  color: var(--color-primary);
  font-size: 22px;
  font-weight: 700;
}

.topic-progress {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--color-border);
  font-size: 0.85rem;
}

.topic-progress span {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);

  font-weight: 600;
  color: var(--color-text-muted);
}

.topic-progress span:first-child {
  color: #15803d;
  background: #f0fdf4;
  border-color: #bbf7d0;
}

.listen-button,
.replay-button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  margin-bottom: 20px;
  border: none;
  border-radius: 999px;
  background: var(--color-primary);
  color: white;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.listen-button:hover,
.replay-button:hover {
  transform: translateY(-1px);
  filter: brightness(1.05);
}

.listen-button:active,
.replay-button:active {
  transform: scale(0.98);
}

.estimated-time {
  display: inline-block;
  margin-top: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  background: #f3f4f6;
  color: #555;
  font-size: 0.9rem;
  font-weight: 600;
}

.result-message {
  color: #6b7280;
  font-size: 1rem;
  margin: 12px 0 24px;
}

.result-stats {
  display: flex;
  gap: 16px;
  justify-content: center;
  align-items: stretch;
  flex-wrap: wrap;
  margin: 24px 0;
}

.result-stat {
  flex: 1;
  max-width: 140px;
  padding: 20px;
  border-radius: 16px;
  background: #f8fafc;
  text-align: center;
  border: 1px solid #e5e7eb;
}

.result-value {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-color);
}

.result-label {
  display: block;
  margin-top: 8px;
  color: #6b7280;
  font-size: 0.9rem;
}

.result-score {
  font-size: 3rem;
  font-weight: 700;
  margin: 24px 0 8px;
  color: var(--primary-color);
}

.result-summary {
  color: #6b7280;
  font-size: 1rem;
  margin-bottom: 24px;
}

.result-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-top: 32px;
}

.result-button {
  flex: 1;
  max-width: 220px;
  padding: 14px 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  transition: all 0.2s ease;
}

.result-button.primary {
  background: var(--color-primary);
  color: white;
  border: 1px solid var(--color-primary);
}

.result-button.secondary {
  background: var(--color-surface);
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.result-button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

[hidden] {
  display: none !important;
}

.leaderboard-header {
  margin-bottom: 2rem;
  text-align: center;
}

.leaderboard-header h2 {
  margin-bottom: 0.5rem;
}

.leaderboard-header p {
  color: var(--text-secondary);
}

.leaderboard-list {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
}

.leaderboard-item {
  display: flex;
  gap: 1rem;
  padding: 1.25rem;
  background: white;
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  transition: 0.25s;
}

.leaderboard-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgb(0 0 0 / 8%);
}

.leaderboard-item--winner {
  border: 2px solid #f5c542;
  background: linear-gradient(135deg, #fffdf5, #fff7dc);

  box-shadow: 0 12px 30px rgb(245 197 66 / 25%);
}

.leaderboard-rank {
  font-size: 2rem;
  display: flex;
  align-items: center;
}

.leaderboard-main {
  flex: 1;
}

.leaderboard-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.leaderboard-user {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.leaderboard-avatar {
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  background: var(--secondary-background-color);
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 1.5rem;
}

.leaderboard-user-info {
  display: flex;
  flex-direction: column;
}

.leaderboard-username {
  font-weight: 700;
}

.leaderboard-level {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  margin-top: 0.25rem;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  background: var(--secondary-background-color);
  color: var(--primary-color);
  font-size: 0.75rem;
  font-weight: 700;
}

.leaderboard-score strong {
  font-size: 1.35rem;
  color: var(--primary-color);
}

.leaderboard-meta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

@media (max-width: 1200px) {
  .leaderboard-list {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .leaderboard-list {
    grid-template-columns: 1fr;
  }
}