Main Content -->
      <main id="main" class="main-content">
        <div class="loading-indicator" id="loading">
          <div class="spinner"></div>
          <p>Loading benchmarks...</p>
        </div>
      </main>

      <!-- Sidebar overlay for mobile -->
      <div class="sidebar-overlay" id="sidebar-overlay"></div>
    </div>

    <!-- Back to Top Button -->
    <button id="back-to-top" class="back-to-top" aria-label="Back to top">
      ↑
    </button>

    <!-- Fullscreen Chart Modal -->
    <d