vllm/docs/source/_templates/sections/header.html

<style>
  .notification-bar {
    width: 100vw;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 16px;
    padding: 0 6px 0 6px;
  }
  .notification-bar p {
    margin: 0;
  }
  .notification-bar a {
    font-weight: bold;
    text-decoration: none;
  }

  /* Light mode styles (default) */
  .notification-bar {
    background-color: #fff3cd;
    color: #856404;
  }
  .notification-bar a {
    color: #d97706;
  }

  /* Dark mode styles */
  html[data-theme=dark] .notification-bar {
    background-color: #333;
    color: #ddd;
  }
  html[data-theme=dark] .notification-bar a {
    color: #ffa500; /* Brighter color for visibility */
  }
</style>

<div class="notification-bar">
  <p>You are viewing the latest developer preview docs. <a href="https://docs.vllm.ai/en/stable/">Click here</a> to view docs for the latest stable release.</p>
</div>