/* Leaderboard Styles */
.leaderboard-container {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--card-bg);
  border: 2px solid var(--card-border-color);
  border-radius: 12px;
  padding: 0;
  width: 90%;
  max-width: 600px;
  max-height: 80vh;
  overflow: hidden;
  z-index: 1000;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
  display: flex;
  flex-direction: column;
}

.leaderboard-container.hidden {
  display: none;
}

.leaderboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem;
  border-bottom: 2px solid var(--card-border-color);
  background: var(--card-header-bg);
}

.leaderboard-header h2 {
  margin: 0;
  font-size: 1.75rem;
}

.close-leaderboard {
  background: none;
  border: none;
  font-size: 2rem;
  cursor: pointer;
  color: var(--text-color);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  transition: background 0.3s ease;
}

.close-leaderboard:hover {
  background: var(--card-bg);
}

.leaderboard-notice {
  background: #fff3cd;
  color: #856404;
  padding: 0.75rem 1.5rem;
  border-bottom: 1px solid #ffeaa7;
  font-size: 0.9rem;
  text-align: center;
}

.leaderboard-personal-best {
  padding: 1rem 1.5rem;
  background: var(--card-bg);
  border-bottom: 1px solid var(--card-border-color);
  font-size: 1.1rem;
  text-align: center;
}

.leaderboard-personal-best strong {
  color: var(--link-color);
  font-size: 1.3rem;
}

.leaderboard-list {
  flex: 1;
  overflow-y: auto;
  padding: 1rem 1.5rem;
}

.leaderboard-list ol {
  list-style: none;
  padding: 0;
  margin: 0;
}

.leaderboard-item {
  display: grid;
  grid-template-columns: 50px 1fr auto 100px;
  gap: 1rem;
  padding: 1rem;
  margin-bottom: 0.5rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border-color);
  border-radius: 8px;
  align-items: center;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.leaderboard-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.leaderboard-item.rank-1 {
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.1), transparent);
  border-color: #ffd700;
}

.leaderboard-item.rank-2 {
  background: linear-gradient(135deg, rgba(192, 192, 192, 0.1), transparent);
  border-color: #c0c0c0;
}

.leaderboard-item.rank-3 {
  background: linear-gradient(135deg, rgba(205, 127, 50, 0.1), transparent);
  border-color: #cd7f32;
}

.leaderboard-item .rank {
  font-size: 1.5rem;
  font-weight: bold;
  text-align: center;
}

.leaderboard-item .name {
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.leaderboard-item .score {
  font-size: 1.25rem;
  font-weight: bold;
  color: var(--link-color);
}

.leaderboard-item .date {
  font-size: 0.85rem;
  color: var(--text-muted-color);
  text-align: right;
}

.no-scores {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted-color);
  font-size: 1.1rem;
}

.leaderboard-footer {
  padding: 1rem 1.5rem;
  border-top: 2px solid var(--card-border-color);
  text-align: center;
  background: var(--card-header-bg);
}

.refresh-leaderboard {
  padding: 0.75rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  background: var(--link-color);
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: opacity 0.3s ease;
}

.refresh-leaderboard:hover {
  opacity: 0.8;
}

.leaderboard-button {
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  background: #f39c12;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: opacity 0.3s ease;
}

.leaderboard-button:hover {
  opacity: 0.8;
}

@media (max-width: 600px) {
  .leaderboard-container {
    width: 95%;
    max-height: 90vh;
  }

  .leaderboard-item {
    grid-template-columns: 40px 1fr auto;
    gap: 0.5rem;
    padding: 0.75rem;
  }

  .leaderboard-item .date {
    display: none;
  }

  .leaderboard-item .rank {
    font-size: 1.2rem;
  }

  .leaderboard-item .score {
    font-size: 1.1rem;
  }
}