HTML Code

<!DOCTYPE html>
<html>
<head>
  <title>CSS * Font Example</title>
  <style>
    * {
      font-family: system-ui, sans-serif;
    }

    body {
      color: #334155;
      line-height: 1.6;
      padding: 1.5rem;
      max-width: 22rem;
    }

    input {
      display: block;
      width: 100%;
      margin-top: 0.5rem;
      padding: 0.5rem;
      border: 1px solid #cbd5e1;
      border-radius: 0.35rem;
      font-size: 0.875rem;
    }

    label {
      font-size: 0.875rem;
      font-weight: 600;
    }
  </style>
</head>
<body>
  <p>All text — including the input below — uses system-ui via the * rule.</p>
  <label for="name">Your name</label>
  <input type="text" id="name" placeholder="Enter your name">
</body>
</html>

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CSS * Selector - Global Font Family