"element-info" style="display: none;">
            <p id="element-name"></p>
            <p id="element-symbol"></p>
            <p id="element-atomic-number"></p>
            <p id="element-atomic-mass"></p>
            <p id="element-summary"></p>
        </div>

        <!-- Mass Calculator Card -->
        <div class="card" id="periodic-table-calculator">
            <input type="text" id="mass-input" placeholder="Enter element symbol">
            <button onclick="calculateMass()">Calculate Mass</butto