From b14c4dbee8844e21aef6daae2bb1b9db8fd176eb Mon Sep 17 00:00:00 2001
From: Dayowe <dayowe@tutamail.com>
Date: Sun, 8 Jun 2025 18:32:24 +0200
Subject: [PATCH] Initial commit

---
 dog-calorie-calculator.html | 437 ++++++++++++++++++++++++++++++++++++
 1 file changed, 437 insertions(+)
 create mode 100644 dog-calorie-calculator.html
diff --git a/dog-calorie-calculator.html b/dog-calorie-calculator.html
new file mode 100644
index 0000000..4bc412e
--- /dev/null
+++ b/dog-calorie-calculator.html
@@ -0,0 +1,437 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Dog Calorie Calculator</title>
+    <style>
+        * {
+            box-sizing: border-box;
+        }
+
+        .calculator-container {
+            max-width: 600px;
+            margin: 0 auto;
+            padding: 20px;
+            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
+            line-height: 1.6;
+            color: #333;
+        }
+
+        .section {
+            background: #f8f9fa;
+            border: 1px solid #e9ecef;
+            border-radius: 8px;
+            padding: 20px;
+            margin-bottom: 20px;
+        }
+
+        .section h2 {
+            margin-top: 0;
+            margin-bottom: 20px;
+            color: #2c3e50;
+            font-size: 1.4em;
+            font-weight: 600;
+        }
+
+        .form-group {
+            margin-bottom: 15px;
+        }
+
+        label {
+            display: block;
+            margin-bottom: 5px;
+            font-weight: 500;
+            color: #495057;
+        }
+
+        select,
+        input[type="number"] {
+            width: 100%;
+            padding: 8px 12px;
+            border: 1px solid #ced4da;
+            border-radius: 4px;
+            font-size: 14px;
+            background-color: white;
+            transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
+        }
+
+        select:focus,
+        input[type="number"]:focus {
+            outline: none;
+            border-color: #80bdff;
+            box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
+        }
+
+        .results {
+            background: #e8f5e8;
+            border: 1px solid #c3e6c3;
+            border-radius: 4px;
+            padding: 15px;
+            margin-top: 20px;
+        }
+
+        .result-item {
+            display: flex;
+            justify-content: space-between;
+            align-items: center;
+            margin-bottom: 8px;
+        }
+
+        .result-item:last-child {
+            margin-bottom: 0;
+        }
+
+        .result-label {
+            font-weight: 500;
+            color: #2d5a2d;
+        }
+
+        .result-value {
+            font-weight: 600;
+            color: #1e3a1e;
+            font-size: 1.1em;
+        }
+
+        .collapsible {
+            background: #fff;
+            border: 1px solid #dee2e6;
+            border-radius: 8px;
+            margin-bottom: 20px;
+            overflow: hidden;
+        }
+
+        .collapsible-header {
+            background: #f1f3f4;
+            padding: 15px 20px;
+            cursor: pointer;
+            user-select: none;
+            display: flex;
+            justify-content: space-between;
+            align-items: center;
+            border-bottom: 1px solid #dee2e6;
+            transition: background-color 0.2s ease;
+        }
+
+        .collapsible-header:hover {
+            background: #e9ecef;
+        }
+
+        .collapsible-header h3 {
+            margin: 0;
+            font-size: 1.2em;
+            color: #2c3e50;
+            font-weight: 600;
+        }
+
+        .collapsible-arrow {
+            transition: transform 0.2s ease;
+            font-size: 1.2em;
+            color: #6c757d;
+        }
+
+        .collapsible.active .collapsible-arrow {
+            transform: rotate(180deg);
+        }
+
+        .collapsible-content {
+            max-height: 0;
+            overflow: hidden;
+            transition: max-height 0.3s ease;
+        }
+
+        .collapsible.active .collapsible-content {
+            max-height: 1000px;
+        }
+
+        .collapsible-inner {
+            padding: 20px;
+        }
+
+        .input-group {
+            display: flex;
+            gap: 10px;
+            align-items: flex-end;
+        }
+
+        .input-group .form-group {
+            flex: 1;
+            margin-bottom: 0;
+        }
+
+        .unit-select {
+            min-width: 80px;
+        }
+
+        .error {
+            color: #dc3545;
+            font-size: 0.875em;
+            margin-top: 5px;
+        }
+
+        @media (max-width: 480px) {
+            .calculator-container {
+                padding: 15px;
+            }
+
+            .section {
+                padding: 15px;
+            }
+
+            .input-group {
+                flex-direction: column;
+                gap: 15px;
+            }
+
+            .input-group .form-group {
+                margin-bottom: 15px;
+            }
+
+            .result-item {
+                flex-direction: column;
+                align-items: flex-start;
+                gap: 5px;
+            }
+        }
+
+        .hidden {
+            display: none;
+        }
+    </style>
+</head>
+<body>
+    <div class="calculator-container">
+        <div class="section">
+            <h2>Dog's Characteristics</h2>
+            
+            <div class="form-group">
+                <label for="dogType">Dog Type / Activity Level:</label>
+                <select id="dogType" aria-describedby="dogTypeHelp">
+                    <option value="">Select dog type...</option>
+                    <option value="3.0">Puppy (0-4 months)</option>
+                    <option value="2.0">Puppy (4 months - adult)</option>
+                    <option value="1.2">Adult - inactive/obese</option>
+                    <option value="1.6">Adult (neutered/spayed) - average activity</option>
+                    <option value="1.8">Adult (intact) - average activity</option>
+                    <option value="1.0">Adult - weight loss</option>
+                    <option value="1.7">Adult - weight gain</option>
+                    <option value="2.0">Working dog - light work</option>
+                    <option value="3.0">Working dog - moderate work</option>
+                    <option value="5.0">Working dog - heavy work</option>
+                    <option value="1.1">Senior dog</option>
+                </select>
+            </div>
+
+            <div class="form-group">
+                <label for="weight">Dog's Weight (kg):</label>
+                <input type="number" id="weight" min="0.1" step="0.1" placeholder="Enter weight in kg" aria-describedby="weightHelp">
+                <div id="weightError" class="error hidden">Please enter a valid weight (minimum 0.1 kg)</div>
+            </div>
+
+            <div class="results" id="calorieResults" style="display: none;">
+                <div class="result-item">
+                    <span class="result-label">Resting Energy Requirement (RER):</span>
+                    <span class="result-value" id="rerValue">- cal/day</span>
+                </div>
+                <div class="result-item">
+                    <span class="result-label">Maintenance Energy Requirement (MER):</span>
+                    <span class="result-value" id="merValue">- cal/day</span>
+                </div>
+            </div>
+        </div>
+
+        <div class="collapsible" id="foodCalculator">
+            <div class="collapsible-header" onclick="toggleCollapsible('foodCalculator')">
+                <h3>How much food is that?</h3>
+                <span class="collapsible-arrow">▼</span>
+            </div>
+            <div class="collapsible-content">
+                <div class="collapsible-inner">
+                    <div class="form-group">
+                        <label for="foodEnergy">Food Energy Content (kcal/100g):</label>
+                        <input type="number" id="foodEnergy" min="1" step="1" placeholder="Enter kcal per 100g" aria-describedby="foodEnergyHelp">
+                        <div id="foodEnergyError" class="error hidden">Please enter a valid energy content (minimum 1 kcal/100g)</div>
+                    </div>
+
+                    <div class="results" id="dailyFoodResults" style="display: none;">
+                        <div class="result-item">
+                            <span class="result-label">Daily Food Amount:</span>
+                            <span class="result-value" id="dailyFoodValue">- g/day</span>
+                        </div>
+                    </div>
+
+                    <div class="form-group" style="margin-top: 20px;">
+                        <label for="days">Number of Days:</label>
+                        <input type="number" id="days" min="1" step="1" value="1" placeholder="Enter number of days" aria-describedby="daysHelp">
+                        <div id="daysError" class="error hidden">Please enter a valid number of days (minimum 1)</div>
+                    </div>
+
+                    <div class="input-group">
+                        <div class="form-group">
+                            <label for="totalFoodDisplay">Total Food Amount:</label>
+                            <input type="text" id="totalFoodDisplay" readonly style="background-color: #f8f9fa; cursor: not-allowed;">
+                        </div>
+                        <div class="form-group">
+                            <label for="unit">Unit:</label>
+                            <select id="unit" class="unit-select" aria-describedby="unitHelp">
+                                <option value="g">grams (g)</option>
+                                <option value="kg">kilograms (kg)</option>
+                                <option value="oz">ounces (oz)</option>
+                                <option value="lb">pounds (lb)</option>
+                            </select>
+                        </div>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </div>
+
+    <script>
+        let currentMER = 0;
+
+        function toggleCollapsible(id) {
+            const element = document.getElementById(id);
+            element.classList.toggle('active');
+        }
+
+        function calculateRER(weightKg) {
+            return 70 * Math.pow(weightKg, 0.75);
+        }
+
+        function calculateMER(rer, factor) {
+            return rer * factor;
+        }
+
+        function validateInput(value, min = 0, isInteger = false) {
+            const num = parseFloat(value);
+            if (isNaN(num) || num < min) return false;
+            if (isInteger && !Number.isInteger(num)) return false;
+            return true;
+        }
+
+        function showError(elementId, show = true) {
+            const errorElement = document.getElementById(elementId);
+            if (show) {
+                errorElement.classList.remove('hidden');
+            } else {
+                errorElement.classList.add('hidden');
+            }
+        }
+
+        function convertUnits(grams, unit) {
+            switch (unit) {
+                case 'kg':
+                    return grams / 1000;
+                case 'oz':
+                    return grams / 28.3495;
+                case 'lb':
+                    return grams / 453.592;
+                default:
+                    return grams;
+            }
+        }
+
+        function formatNumber(num, decimals = 0) {
+            return num.toFixed(decimals).replace(/\.?0+$/, '');
+        }
+
+        function updateCalorieCalculations() {
+            const weight = document.getElementById('weight').value;
+            const dogTypeFactor = document.getElementById('dogType').value;
+            
+            showError('weightError', false);
+            
+            if (!weight || !validateInput(weight, 0.1)) {
+                showError('weightError', true);
+                document.getElementById('calorieResults').style.display = 'none';
+                return;
+            }
+
+            if (!dogTypeFactor) {
+                document.getElementById('calorieResults').style.display = 'none';
+                return;
+            }
+
+            const weightKg = parseFloat(weight);
+            const factor = parseFloat(dogTypeFactor);
+            
+            const rer = calculateRER(weightKg);
+            const mer = calculateMER(rer, factor);
+            
+            currentMER = mer;
+            
+            document.getElementById('rerValue').textContent = formatNumber(rer, 0) + ' cal/day';
+            document.getElementById('merValue').textContent = formatNumber(mer, 0) + ' cal/day';
+            document.getElementById('calorieResults').style.display = 'block';
+            
+            updateFoodCalculations();
+        }
+
+        function updateFoodCalculations() {
+            if (currentMER === 0) return;
+            
+            const foodEnergy = document.getElementById('foodEnergy').value;
+            const days = document.getElementById('days').value;
+            const unit = document.getElementById('unit').value;
+            
+            showError('foodEnergyError', false);
+            showError('daysError', false);
+            
+            if (!foodEnergy || !validateInput(foodEnergy, 1)) {
+                if (foodEnergy) showError('foodEnergyError', true);
+                document.getElementById('dailyFoodResults').style.display = 'none';
+                document.getElementById('totalFoodDisplay').value = '';
+                return;
+            }
+
+            if (!days || !validateInput(days, 1, true)) {
+                if (days) showError('daysError', true);
+                document.getElementById('totalFoodDisplay').value = '';
+                return;
+            }
+
+            const energyPer100g = parseFloat(foodEnergy);
+            const numDays = parseInt(days);
+            
+            const dailyFoodGrams = (currentMER / energyPer100g) * 100;
+            const totalFoodGrams = dailyFoodGrams * numDays;
+            
+            document.getElementById('dailyFoodValue').textContent = formatNumber(dailyFoodGrams, 1) + ' g/day';
+            document.getElementById('dailyFoodResults').style.display = 'block';
+            
+            const convertedAmount = convertUnits(totalFoodGrams, unit);
+            const unitLabel = unit === 'g' ? 'g' : unit === 'kg' ? 'kg' : unit === 'oz' ? 'oz' : 'lb';
+            const decimals = unit === 'g' ? 0 : unit === 'kg' ? 2 : 1;
+            
+            document.getElementById('totalFoodDisplay').value = formatNumber(convertedAmount, decimals) + ' ' + unitLabel;
+        }
+
+        document.getElementById('weight').addEventListener('input', updateCalorieCalculations);
+        document.getElementById('dogType').addEventListener('change', updateCalorieCalculations);
+        document.getElementById('foodEnergy').addEventListener('input', updateFoodCalculations);
+        document.getElementById('days').addEventListener('input', updateFoodCalculations);
+        document.getElementById('unit').addEventListener('change', updateFoodCalculations);
+
+        document.getElementById('weight').addEventListener('blur', function() {
+            const weight = this.value;
+            if (weight && !validateInput(weight, 0.1)) {
+                showError('weightError', true);
+            }
+        });
+
+        document.getElementById('foodEnergy').addEventListener('blur', function() {
+            const energy = this.value;
+            if (energy && !validateInput(energy, 1)) {
+                showError('foodEnergyError', true);
+            }
+        });
+
+        document.getElementById('days').addEventListener('blur', function() {
+            const days = this.value;
+            if (days && !validateInput(days, 1, true)) {
+                showError('daysError', true);
+            }
+        });
+    </script>
+</body>
+</html>
\ No newline at end of file
