HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <title>number:in-range</title>
  <style>
    body {
      margin: 16px;
      font-family: system-ui, sans-serif;
    }

    label {
      display: block;
      margin-bottom: 0.35rem;
      font-weight: 600;
    }

    input[type="number"] {
      padding: 0.45rem 0.6rem;
      border: 2px solid #cbd5e1;
      border-radius: 6px;
      font-size: 1rem;
    }

    input[type="number"]:in-range {
      border-color: #16a34a;
      background: #f0fdf4;
    }
  </style>
</head>
<body>
  <label for="score">Score (0–100)</label>
  <input id="score" type="number" min="0" max="100" value="75">
</body>
</html>

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CSS :in-range — number input