<header class="header">
  <button id="sidebar-toggle" class="sidebar-toggle" aria-label="Toggle navigation">☰</button>
  <a href="/" class="logo">{{ config.site.title }}</a>
  <input id="search-input" class="search-input" type="search" placeholder="Search..." aria-label="Search" />
  <button id="theme-toggle" class="theme-toggle" aria-label="Toggle dark mode">🌓</button>
  <div id="search-results" class="search-results"></div>
</header>
