Untitled

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Protein Calculator</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            background-color: #f4f4f4;
        }
        .calculator {
            background: white;
            padding: 20px;
            border-radius: 8px;
            box-shadow: 0 0 10px rgba(0,0,0,0.1);
        }
        label, select, input {
            display: block;
            margin: 10px 0;
        }
        button {
            margin-top: 10px;
            padding: 10px;
            background-color: #4CAF50;
            color: white;
            border: none;
            border-radius: 4px;
            cursor: pointer;
        }
        #result {
            margin-top: 20px;
            font-weight: bold;
        }
    </style>
</head>
<body>
    <div class="calculator">
        <h2>Protein Calculator</h2>
        <label for="weight">Weight (kg):</label>
        <input type="number" id="weight" min="1" required>

        <label for="activity">Activity Level:</label>
        <select id="activity">
            <option value="1.2">Sedentary</option>
            <option value="1.375">Lightly Active</option>
            <option value="1.55">Moderately Active</option>
            <option value="1.725">Very Active</option>
            <option value="1.9">Extremely Active</option>
        </select>

        <button onclick="calculateProtein()">Calculate</button>

        <div id="result"></div>
    </div>

    <script>
        function calculateProtein() {
            const weight = document.getElementById('weight').value;
            const activityFactor = parseFloat(document.getElementById('activity').value);
            
            // General guideline: 0.8g of protein per kg of body weight for a sedentary person, 
            // but active individuals might need more.
            const proteinPerKg = 0.8 * activityFactor;
            const proteinNeeded = Math.round(weight * proteinPerKg);
            
            document.getElementById('result').innerText = `You need approximately ${proteinNeeded} grams of protein per day.`;
        }
    </script>
</body>
</html>
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