container-queries/flexible-text.html

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Container Queries</title>
  <link rel="stylesheet" href="../base.css">
</head>

<body>

  <article class="container">
    <h2>Container Queries</h2>
  </article>
  <article class="container" >
    <h2 class="fit" style="--letters:12;">Are awesome!</h2>
  </article>
  <article class="container">
    <h2 class="fit" style="--letters:25;">Resize me you silly goose</h2>
  </article>
  <article class="container">
    <h2>in Chrome, Safari, iOS, Edge</h2>
  </article>
  <article class="container">
    <h2>in Firefox Feb 14th 💕</h2>
  </article>

  <style>
    .container {
      container: article / inline-size;
    }

    h2 {
      font-size: 7cqw;
    }

    @container article (width < 150px) {
      h2 {
        color: #ffc600;
      }
    }

    h2.fit {
      font-family: 'Operator Mono', 'monospace';
      /* 12 letters */
      --minFontSize: 10px;
      font-size: max(
        var(--minFontSize),
        calc(calc(100 / var(--letters)) *  1.5cqw)
      );
    }


  </style>

  <style>
    body {
      background: url('grad.png');
      height: 100vh;
      display: flex;
      flex-direction: row;
      flex-wrap: wrap;
      display: grid;
      grid-template-columns: 1fr;
      align-content: center;
      align-items: center;
    }

    .container {
      background: white;
      padding: 10px;
      border-radius: 20px;
      box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
      overflow: hidden;
      resize: horizontal;
      margin: 1em auto;
      width: 50%;
    }

    h2 {
      margin: 0;
      text-align: center;
    }

  </style>
</body>

</html>