Minimalist Heatmap - MeggiTools

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Minimalist Heatmap</title>
    <style>
        body {
            font-family: 'Helvetica Neue', sans-serif;
            background-color: #f0f2f5;
            margin: 0;
            padding: 20px;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
        }
        .minimalist-table {
            width: 100%;
            max-width: 600px;
            border-collapse: collapse;
            background-color: #fff;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        }
        .minimalist-table th,
        .minimalist-table td {
            padding: 12px;
            text-align: center;
            border-bottom: 1px solid #ddd;
        }
        .minimalist-table th {
            background-color: #007BFF;
            color: white;
        }
        .minimalist-table td {
            background-color: #f9f9f9;
        }
        .minimalist-table td[data-value="low"] {
            background-color: #f2dede;
        }
        .minimalist-table td[data-value="medium"] {
            background-color: #fcf8e3;
        }
        .minimalist-table td[data-value="high"] {
            background-color: #dff0d8;
        }
        .minimalist-table td[data-value="very-high"] {
            background-color: #d9edf7;
        }
        .minimalist-table td:hover {
            background-color: #007BFF;
            color: white;
        }
        .minimalist-table td::before {
            content: attr(data-value);
            font-size: 0.75em;
            color: #666;
        }
    </style>
</head>
<body>
    <table class="minimalist-table">
        <thead>
            <tr>
                <th>Category</th>
                <th>Item 1</th>
                <th>Item 2</th>
                <th>Item 3</th>
                <th>Item 4</th>
            </tr>
        </thead>
        <tbody>
            <tr>
                <td>Category 1</td>
                <td data-value="low">😟</td>
                <td data-value="medium">😐</td>
                <td data-value="high">😊</td>
                <td data-value="very-high">😁</td>
            </tr>
            <tr>
                <td>Category 2</td>
                <td data-value="high">😊</td>
                <td data-value="very-high">😁</td>
                <td data-value="low">😟</td>
                <td data-value="medium">😐</td>
            </tr>
            <tr>
                <td>Category 3</td>
                <td data-value="medium">😐</td>
                <td data-value="low">😟</td>
                <td data-value="very-high">😁</td>
                <td data-value="high">😊</td>
            </tr>
        </tbody>
    </table>
    <script>
        document.querySelectorAll('.minimalist-table td').forEach(cell => {
            cell.addEventListener('click', () => {
                const value = cell.getAttribute('data-value');
                alert(`You clicked on a cell with value: ${value}`);
            });
        });
    </script>
</body>
</html>