<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Scalable Layout - 1440px Based</title>
  <meta name="viewport" content="width=device-width, initial-scale=1.0">

  <style>
    /* Core scaling factor based on 1440px design */
    html {
      --vw: calc(min(100vw, 1440px) / 1440);
    }

    body {
      margin: 0;
      padding: 0;
      font-family: "Segoe UI", Roboto, sans-serif;
      background-color: #f7f7f7;
      color: #333;
      overflow-y: scroll; /* Prevent layout shift from scrollbar */
    }

    .container {
      width: calc(1200 * var(--vw));
      margin: 0 auto;
      padding: calc(32 * var(--vw));
      background-color: #ffffff;
      box-shadow: 0 0 calc(16 * var(--vw)) rgba(0, 0, 0, 0.05);
      border-radius: calc(12 * var(--vw));
      margin-top: calc(40 * var(--vw));
    }

    .title {
      font-size: clamp(24px, calc(32 * var(--vw)), 40px);
      margin-bottom: calc(24 * var(--vw));
      font-weight: bold;
    }

    .card {
      background-color: #eaeaea;
      padding: calc(20 * var(--vw));
      margin-bottom: calc(20 * var(--vw));
      border-radius: calc(8 * var(--vw));
    }

    .card h2 {
      font-size: clamp(18px, calc(24 * var(--vw)), 32px);
      margin: 0 0 calc(12 * var(--vw)) 0;
    }

    .card p {
      font-size: clamp(14px, calc(16 * var(--vw)), 20px);
      line-height: 1.5;
      margin: 0;
    }

    .footer {
      text-align: center;
      margin-top: calc(40 * var(--vw));
      font-size: clamp(12px, calc(14 * var(--vw)), 18px);
      color: #888;
    }
  </style>
</head>
<body>

  <div class="container">
    <div class="title">Scalable Layout Demo</div>

    <div class="card">
      <h2>Card Title 1</h2>
      <p>This component scales proportionally from the 1440px design width. Resize the window to see the effect.</p>
    </div>

    <div class="card">
      <h2>Card Title 2</h2>
      <p>Spacing, padding, and font sizes all adapt to screen width using a single scaling factor: <code>--vw</code>.</p>
    </div>

    <div class="card">
      <h2>Card Title 3</h2>
      <p>This layout is not responsive (no breakpoints), but still looks good across many desktop resolutions.</p>
    </div>
  </div>

  <div class="footer">
    &copy; 2025 Scalable UI Co. All rights reserved.
  </div>

</body>
</html>
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