/* leaderboard.css — 排行榜系统样式 */
    /* ════════════════════════════════════════
       排行榜系统样式
    ════════════════════════════════════════ */

    .leaderboard-toggle-btn {
      position: fixed;
      top: 20px;
      right: 196px;
      z-index: 100;
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
      border: 2px solid #fff;
      color: #fff;
      font-size: 1.2rem;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
      transition: all 0.3s ease;
    }

    .leaderboard-toggle-btn:hover {
      transform: scale(1.1);
      box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
    }

    .leaderboard-overlay {
      position: fixed;
      inset: 0;
      background: rgba(0, 0, 0, 0.5);
      z-index: 200;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.3s ease;
    }

    .leaderboard-overlay.show {
      opacity: 1;
      pointer-events: auto;
    }

    .leaderboard-panel {
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      background: #fff;
      border-radius: 24px 24px 0 0;
      z-index: 210;
      max-height: 80vh;
      overflow-y: auto;
      transform: translateY(100%);
      transition: transform 0.3s ease;
    }

    .leaderboard-panel.open {
      transform: translateY(0);
    }

    .leaderboard-panel-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px 24px;
      border-bottom: 1px solid #eee;
      position: sticky;
      top: 0;
      background: #fff;
    }

    .leaderboard-panel-header h3 {
      font-size: 1.2rem;
      margin: 0;
    }

    .leaderboard-panel-close {
      background: none;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      color: #999;
    }

    .leaderboard-content {
      padding: 24px;
    }

    .leaderboard-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .leaderboard-item {
      display: flex;
      align-items: center;
      gap: 16px;
      padding: 16px;
      background: #f9f9f9;
      border-radius: 8px;
      border-left: 4px solid #3498db;
      transition: all 0.3s ease;
    }

    .leaderboard-item:hover {
      background: #f0f0f0;
      transform: translateX(4px);
    }

    .leaderboard-rank {
      font-size: 1.5rem;
      font-weight: bold;
      min-width: 40px;
      text-align: center;
    }

    .leaderboard-info {
      flex: 1;
    }

    .leaderboard-recipe {
      display: flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 8px;
    }

    .leaderboard-mode {
      font-size: 0.8rem;
      background: #3498db;
      color: #fff;
      padding: 2px 8px;
      border-radius: 4px;
      font-weight: bold;
    }

    .leaderboard-input {
      font-size: 0.9rem;
      color: #333;
      font-weight: 500;
    }

    .leaderboard-stats {
      display: flex;
      gap: 12px;
      font-size: 0.8rem;
      color: #666;
    }

    .leaderboard-stat {
      display: flex;
      align-items: center;
      gap: 4px;
    }

    .leaderboard-score {
      margin-left: auto;
      font-weight: bold;
      color: #f39c12;
    }

    .leaderboard-empty {
      text-align: center;
      padding: 60px 24px;
      color: #999;
    }

    .empty-icon {
      font-size: 3rem;
      display: block;
      margin-bottom: 16px;
    }


    /* 移动端适配 */
    @media (max-width: 480px) {
      .leaderboard-item { padding: 12px; gap: 12px; }
      .leaderboard-rank { font-size: 1.2rem; min-width: 32px; }
      .leaderboard-mode { font-size: 0.7rem; padding: 2px 6px; }
      .leaderboard-input { font-size: 0.8rem; }
      .leaderboard-stats { font-size: 0.7rem; gap: 8px; }
      .leaderboard-score { font-size: 0.75rem; }
    }