Update

calculator.js

@@ -0,0 +1,495 @@
+/**
+ * Dog Calorie Calculator
+ * Calculates dog's daily calorie requirements and food amounts
+ * by Canine Nutrition and Wellness
+ */
+
+class DogCalorieCalculator {
+    constructor() {
+        this.currentMER = 0;
+        this.isImperial = false;
+        this.init();
+    }
+
+    init() {
+        this.bindEvents();
+        this.updateUnitLabels();
+    }
+
+    bindEvents() {
+        const weightInput = document.getElementById('weight');
+        const dogTypeSelect = document.getElementById('dogType');
+        const foodEnergyInput = document.getElementById('foodEnergy');
+        const daysInput = document.getElementById('days');
+        const unitSelect = document.getElementById('unit');
+        const unitToggle = document.getElementById('unitToggle');
+
+        if (weightInput) weightInput.addEventListener('input', () => this.updateCalorieCalculations());
+        if (weightInput) weightInput.addEventListener('blur', () => this.validateWeight());
+        
+        if (dogTypeSelect) dogTypeSelect.addEventListener('change', () => this.updateCalorieCalculations());
+        
+        if (foodEnergyInput) foodEnergyInput.addEventListener('input', () => this.updateFoodCalculations());
+        if (foodEnergyInput) foodEnergyInput.addEventListener('blur', () => this.validateFoodEnergy());
+        
+        if (daysInput) daysInput.addEventListener('input', () => this.updateFoodCalculations());
+        if (daysInput) daysInput.addEventListener('blur', () => this.validateDays());
+        
+        if (unitSelect) unitSelect.addEventListener('change', () => this.updateFoodCalculations());
+        
+        if (unitToggle) unitToggle.addEventListener('change', () => this.toggleUnits());
+    }
+
+    calculateRER(weightKg) {
+        return 70 * Math.pow(weightKg, 0.75);
+    }
+
+    calculateMER(rer, factor) {
+        return rer * factor;
+    }
+
+    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;
+    }
+
+    showError(elementId, show = true) {
+        const errorElement = document.getElementById(elementId);
+        if (errorElement) {
+            if (show) {
+                errorElement.classList.remove('dog-calculator-hidden');
+            } else {
+                errorElement.classList.add('dog-calculator-hidden');
+            }
+        }
+    }
+
+    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;
+        }
+    }
+
+    formatNumber(num, decimals = 0) {
+        return num.toFixed(decimals).replace(/\.?0+$/, '');
+    }
+
+    toggleUnits() {
+        const toggle = document.getElementById('unitToggle');
+        this.isImperial = toggle.checked;
+        
+        this.updateUnitLabels();
+        this.convertExistingValues();
+        this.updateCalorieCalculations();
+    }
+
+    updateUnitLabels() {
+        const metricLabel = document.getElementById('metricLabel');
+        const imperialLabel = document.getElementById('imperialLabel');
+        const weightLabel = document.getElementById('weightLabel');
+        const foodEnergyLabel = document.getElementById('foodEnergyLabel');
+        const weightInput = document.getElementById('weight');
+        const foodEnergyInput = document.getElementById('foodEnergy');
+        const unitSelect = document.getElementById('unit');
+
+        if (metricLabel && imperialLabel) {
+            metricLabel.classList.toggle('active', !this.isImperial);
+            imperialLabel.classList.toggle('active', this.isImperial);
+        }
+
+        if (this.isImperial) {
+            if (weightLabel) weightLabel.textContent = "Dog's Weight (lbs):";
+            if (weightInput) {
+                weightInput.placeholder = "Enter weight in lbs";
+                weightInput.min = "0.2"; // ~0.1kg in lbs
+                weightInput.step = "0.1";
+            }
+            if (foodEnergyLabel) foodEnergyLabel.textContent = "Food Energy Content (kcal/oz):";
+            if (foodEnergyInput) {
+                foodEnergyInput.placeholder = "Enter kcal per oz";
+                foodEnergyInput.min = "0.03"; // ~1 kcal/100g in kcal/oz
+                foodEnergyInput.step = "0.01";
+            }
+            if (unitSelect) {
+                unitSelect.innerHTML = `
+                    <option value="oz">ounces (oz)</option>
+                    <option value="lb">pounds (lb)</option>
+                    <option value="g">grams (g)</option>
+                    <option value="kg">kilograms (kg)</option>
+                `;
+            }
+        } else {
+            if (weightLabel) weightLabel.textContent = "Dog's Weight (kg):";
+            if (weightInput) {
+                weightInput.placeholder = "Enter weight in kg";
+                weightInput.min = "0.1";
+                weightInput.step = "0.1";
+            }
+            if (foodEnergyLabel) foodEnergyLabel.textContent = "Food Energy Content (kcal/100g):";
+            if (foodEnergyInput) {
+                foodEnergyInput.placeholder = "Enter kcal per 100g";
+                foodEnergyInput.min = "1";
+                foodEnergyInput.step = "1";
+            }
+            if (unitSelect) {
+                unitSelect.innerHTML = `
+                    <option value="g">grams (g)</option>
+                    <option value="kg">kilograms (kg)</option>
+                    <option value="oz">ounces (oz)</option>
+                    <option value="lb">pounds (lb)</option>
+                `;
+            }
+        }
+    }
+
+    convertExistingValues() {
+        const weightInput = document.getElementById('weight');
+        const foodEnergyInput = document.getElementById('foodEnergy');
+
+        if (weightInput && weightInput.value) {
+            const currentWeight = parseFloat(weightInput.value);
+            if (!isNaN(currentWeight)) {
+                if (this.isImperial) {
+                    // Convert kg to lbs
+                    weightInput.value = this.formatNumber(currentWeight * 2.20462, 1);
+                } else {
+                    // Convert lbs to kg
+                    weightInput.value = this.formatNumber(currentWeight / 2.20462, 1);
+                }
+            }
+        }
+
+        if (foodEnergyInput && foodEnergyInput.value) {
+            const currentEnergy = parseFloat(foodEnergyInput.value);
+            if (!isNaN(currentEnergy)) {
+                if (this.isImperial) {
+                    // Convert kcal/100g to kcal/oz
+                    foodEnergyInput.value = this.formatNumber(currentEnergy / 3.52739, 2);
+                } else {
+                    // Convert kcal/oz to kcal/100g
+                    foodEnergyInput.value = this.formatNumber(currentEnergy * 3.52739, 0);
+                }
+            }
+        }
+    }
+
+    getWeightInKg() {
+        const weightInput = document.getElementById('weight');
+        if (!weightInput || !weightInput.value) return null;
+        
+        const weight = parseFloat(weightInput.value);
+        if (isNaN(weight)) return null;
+        
+        return this.isImperial ? weight / 2.20462 : weight;
+    }
+
+    getFoodEnergyPer100g() {
+        const foodEnergyInput = document.getElementById('foodEnergy');
+        if (!foodEnergyInput || !foodEnergyInput.value) return null;
+        
+        const energy = parseFloat(foodEnergyInput.value);
+        if (isNaN(energy)) return null;
+        
+        return this.isImperial ? energy * 3.52739 : energy;
+    }
+
+    validateWeight() {
+        const weight = document.getElementById('weight')?.value;
+        if (weight && !this.validateInput(weight, 0.1)) {
+            this.showError('weightError', true);
+        } else {
+            this.showError('weightError', false);
+        }
+    }
+
+    validateFoodEnergy() {
+        const energy = document.getElementById('foodEnergy')?.value;
+        if (energy && !this.validateInput(energy, 1)) {
+            this.showError('foodEnergyError', true);
+        } else {
+            this.showError('foodEnergyError', false);
+        }
+    }
+
+    validateDays() {
+        const days = document.getElementById('days')?.value;
+        if (days && !this.validateInput(days, 1, true)) {
+            this.showError('daysError', true);
+        } else {
+            this.showError('daysError', false);
+        }
+    }
+
+    updateCalorieCalculations() {
+        const dogTypeSelect = document.getElementById('dogType');
+        const calorieResults = document.getElementById('calorieResults');
+        const rerValue = document.getElementById('rerValue');
+        const merValue = document.getElementById('merValue');
+
+        if (!dogTypeSelect || !calorieResults || !rerValue || !merValue) {
+            return;
+        }
+
+        const weightKg = this.getWeightInKg();
+        const dogTypeFactor = dogTypeSelect.value;
+        
+        this.showError('weightError', false);
+        
+        if (!weightKg || weightKg < 0.1) {
+            if (weightKg !== null) this.showError('weightError', true);
+            calorieResults.style.display = 'none';
+            return;
+        }
+
+        if (!dogTypeFactor) {
+            calorieResults.style.display = 'none';
+            return;
+        }
+
+        const factor = parseFloat(dogTypeFactor);
+        
+        const rer = this.calculateRER(weightKg);
+        const mer = this.calculateMER(rer, factor);
+        
+        this.currentMER = mer;
+        
+        rerValue.textContent = this.formatNumber(rer, 0) + ' cal/day';
+        merValue.textContent = this.formatNumber(mer, 0) + ' cal/day';
+        calorieResults.style.display = 'block';
+        
+        this.updateFoodCalculations();
+    }
+
+    updateFoodCalculations() {
+        if (this.currentMER === 0) return;
+        
+        const daysInput = document.getElementById('days');
+        const unitSelect = document.getElementById('unit');
+        const dailyFoodResults = document.getElementById('dailyFoodResults');
+        const dailyFoodValue = document.getElementById('dailyFoodValue');
+        const totalFoodDisplay = document.getElementById('totalFoodDisplay');
+
+        if (!daysInput || !unitSelect || !dailyFoodResults || !dailyFoodValue || !totalFoodDisplay) {
+            return;
+        }
+
+        const energyPer100g = this.getFoodEnergyPer100g();
+        const days = daysInput.value;
+        const unit = unitSelect.value;
+        
+        this.showError('foodEnergyError', false);
+        this.showError('daysError', false);
+        
+        const minEnergy = this.isImperial ? 0.03 : 1;
+        if (!energyPer100g || energyPer100g < minEnergy) {
+            if (energyPer100g !== null) this.showError('foodEnergyError', true);
+            dailyFoodResults.style.display = 'none';
+            totalFoodDisplay.value = '';
+            return;
+        }
+
+        if (!days || !this.validateInput(days, 1, true)) {
+            if (days) this.showError('daysError', true);
+            totalFoodDisplay.value = '';
+            return;
+        }
+
+        const numDays = parseInt(days);
+        
+        const dailyFoodGrams = (this.currentMER / energyPer100g) * 100;
+        const totalFoodGrams = dailyFoodGrams * numDays;
+        
+        dailyFoodValue.textContent = this.formatNumber(dailyFoodGrams, 1) + ' g/day';
+        dailyFoodResults.style.display = 'block';
+        
+        const convertedAmount = this.convertUnits(totalFoodGrams, unit);
+        const unitLabel = unit === 'g' ? 'g' : unit === 'kg' ? 'kg' : unit === 'oz' ? 'oz' : 'lb';
+        const decimals = unit === 'g' ? 0 : unit === 'kg' ? 2 : 1;
+        
+        totalFoodDisplay.value = this.formatNumber(convertedAmount, decimals) + ' ' + unitLabel;
+    }
+}
+
+// Global function for collapsible functionality (no longer used)
+function toggleCollapsible(id) {
+    // Food section is now always expanded
+}
+
+// Initialize calculator when DOM is ready
+document.addEventListener('DOMContentLoaded', function() {
+    new DogCalorieCalculator();
+    
+    // Initialize share URL
+    const shareUrlInput = document.getElementById('shareUrl');
+    if (shareUrlInput) {
+        shareUrlInput.value = window.location.href;
+    }
+    
+    // Update embed codes with current domain
+    updateEmbedCodes();
+});
+
+// Share and Embed Functions
+function showShareOptions() {
+    const modal = document.getElementById('shareModal');
+    if (modal) {
+        modal.style.display = 'block';
+        document.body.style.overflow = 'hidden';
+    }
+}
+
+function closeShareModal() {
+    const modal = document.getElementById('shareModal');
+    if (modal) {
+        modal.style.display = 'none';
+        document.body.style.overflow = 'auto';
+    }
+}
+
+function showEmbedModal() {
+    const modal = document.getElementById('embedModal');
+    if (modal) {
+        modal.style.display = 'block';
+        document.body.style.overflow = 'hidden';
+    }
+}
+
+function closeEmbedModal() {
+    const modal = document.getElementById('embedModal');
+    if (modal) {
+        modal.style.display = 'none';
+        document.body.style.overflow = 'auto';
+    }
+}
+
+// Share functions
+function shareToFacebook() {
+    const url = encodeURIComponent(window.location.href);
+    const text = encodeURIComponent('Check out this Dog Calorie Calculator!');
+    window.open(`https://www.facebook.com/sharer/sharer.php?u=${url}&quote=${text}`, '_blank');
+}
+
+function shareToTwitter() {
+    const url = encodeURIComponent(window.location.href);
+    const text = encodeURIComponent('Calculate your dog\'s daily calorie needs with this helpful tool!');
+    window.open(`https://twitter.com/intent/tweet?url=${url}&text=${text}`, '_blank');
+}
+
+function shareToLinkedIn() {
+    const url = encodeURIComponent(window.location.href);
+    window.open(`https://www.linkedin.com/sharing/share-offsite/?url=${url}`, '_blank');
+}
+
+function shareViaEmail() {
+    const subject = encodeURIComponent('Dog Calorie Calculator');
+    const body = encodeURIComponent(`Check out this helpful Dog Calorie Calculator:\n\n${window.location.href}\n\nIt helps calculate your dog's daily calorie needs based on their weight and activity level.`);
+    window.location.href = `mailto:?subject=${subject}&body=${body}`;
+}
+
+function copyShareLink() {
+    const shareUrlInput = document.getElementById('shareUrl');
+    if (shareUrlInput) {
+        shareUrlInput.select();
+        shareUrlInput.setSelectionRange(0, 99999); // For mobile devices
+        
+        try {
+            document.execCommand('copy');
+            
+            // Update button to show success
+            const copyBtn = document.querySelector('.dog-calculator-share-copy');
+            if (copyBtn) {
+                const originalHTML = copyBtn.innerHTML;
+                copyBtn.innerHTML = '<i class="fas fa-check"></i> Copied!';
+                copyBtn.style.background = '#7fa464';
+                
+                setTimeout(() => {
+                    copyBtn.innerHTML = originalHTML;
+                    copyBtn.style.background = '';
+                }, 2000);
+            }
+        } catch (err) {
+            console.error('Failed to copy text: ', err);
+        }
+    }
+}
+
+// Embed functions
+function updateEmbedCodes() {
+    const currentDomain = window.location.origin;
+    const currentPath = window.location.pathname.substring(0, window.location.pathname.lastIndexOf('/'));
+    const baseUrl = currentDomain + currentPath;
+    
+    const widgetCode = document.getElementById('widgetCode');
+    const iframeCode = document.getElementById('iframeCode');
+    
+    if (widgetCode) {
+        widgetCode.textContent = `<script src="${baseUrl}/dog-calculator-widget.js"></script>\n<div id="dog-calorie-calculator"></div>`;
+    }
+    
+    if (iframeCode) {
+        iframeCode.textContent = `<iframe src="${baseUrl}/iframe.html" \n        width="100%" height="600" \n        frameborder="0" \n        title="Dog Calorie Calculator">\n</iframe>`;
+    }
+}
+
+function copyEmbedCode(type) {
+    const codeElement = type === 'widget' ? document.getElementById('widgetCode') : document.getElementById('iframeCode');
+    const button = event.target.closest('.dog-calculator-copy-btn');
+    
+    if (codeElement && button) {
+        const textArea = document.createElement('textarea');
+        textArea.value = codeElement.textContent;
+        textArea.style.position = 'fixed';
+        textArea.style.left = '-999999px';
+        textArea.style.top = '-999999px';
+        document.body.appendChild(textArea);
+        textArea.focus();
+        textArea.select();
+        
+        try {
+            document.execCommand('copy');
+            textArea.remove();
+            
+            // Update button to show success
+            const originalHTML = button.innerHTML;
+            button.innerHTML = '<i class="fas fa-check"></i> Copied';
+            button.classList.add('copied');
+            
+            setTimeout(() => {
+                button.innerHTML = originalHTML;
+                button.classList.remove('copied');
+            }, 2000);
+        } catch (err) {
+            console.error('Failed to copy text: ', err);
+            textArea.remove();
+        }
+    }
+}
+
+// Close modals when clicking outside
+window.addEventListener('click', function(event) {
+    const shareModal = document.getElementById('shareModal');
+    const embedModal = document.getElementById('embedModal');
+    
+    if (event.target === shareModal) {
+        closeShareModal();
+    } else if (event.target === embedModal) {
+        closeEmbedModal();
+    }
+});
+
+// Close modals with Escape key
+window.addEventListener('keydown', function(event) {
+    if (event.key === 'Escape') {
+        closeShareModal();
+        closeEmbedModal();
+    }
+});

dog-food-calculator-widget.js

@@ -0,0 +1,695 @@
+/**
+ * Dog Calorie Calculator Widget
+ * Embeddable JavaScript widget for calculating dog's daily calorie requirements
+ * by Canine Nutrition and Wellness - https://caninenutritionandwellness.com
+ * 
+ * Usage: 
+ * <script src="https://yourdomain.com/dog-calculator-widget.js"></script>
+ * <div id="dog-calorie-calculator"></div>
+ */
+
+(function() {
+    'use strict';
+
+    // Widget styles - Using Shadow DOM for better isolation where supported
+    const widgetStyles = `
+        .dog-calc-widget {
+            max-width: 600px;
+            margin: 0 auto;
+            padding: 24px;
+            font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
+            line-height: 1.5;
+            color: #6f3f6d;
+            box-sizing: border-box;
+        }
+
+        .dog-calc-widget *,
+        .dog-calc-widget *::before,
+        .dog-calc-widget *::after {
+            box-sizing: border-box;
+        }
+
+        .dog-calc-section {
+            background: #fdfcfe;
+            border: 1px solid #e8e3ed;
+            border-radius: 8px;
+            padding: 24px;
+            margin-bottom: 24px;
+            box-shadow: 0 3px 6px rgba(0, 0, 0, 0.08);
+        }
+
+        .dog-calc-section h2 {
+            margin-top: 0;
+            margin-bottom: 24px;
+            color: #6f3f6d;
+            font-size: 1.5rem;
+            font-weight: 600;
+        }
+
+        .dog-calc-form-group {
+            margin-bottom: 20px;
+        }
+
+        .dog-calc-form-group label {
+            display: block;
+            margin-bottom: 8px;
+            font-weight: 500;
+            color: #6f3f6d;
+            font-size: 1rem;
+        }
+
+        .dog-calc-form-group select,
+        .dog-calc-form-group input[type="number"],
+        .dog-calc-form-group input[type="text"] {
+            width: 100%;
+            padding: 12px 16px;
+            border: 1px solid #e8e3ed;
+            border-radius: 6px;
+            font-size: 1rem;
+            font-family: inherit;
+            background-color: #ffffff;
+            color: #6f3f6d;
+            transition: all 0.2s ease;
+            -webkit-appearance: none;
+            -moz-appearance: none;
+            appearance: none;
+            background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236f3f6d' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
+            background-repeat: no-repeat;
+            background-position: right 12px center;
+            background-size: 20px;
+            padding-right: 40px;
+        }
+
+        .dog-calc-form-group select option {
+            background-color: #ffffff;
+            color: #6f3f6d;
+        }
+
+        .dog-calc-form-group input[type="number"],
+        .dog-calc-form-group input[type="text"] {
+            background-image: none;
+            padding-right: 16px;
+        }
+
+        .dog-calc-form-group select:focus,
+        .dog-calc-form-group input[type="number"]:focus,
+        .dog-calc-form-group input[type="text"]:focus {
+            outline: none;
+            border-color: #f19a5f;
+            background-color: #ffffff;
+            box-shadow: 0 0 0 3px rgba(241, 154, 95, 0.1);
+        }
+
+        .dog-calc-form-group input[readonly] {
+            background-color: #f8f5fa;
+            cursor: not-allowed;
+            color: #635870;
+        }
+
+        .dog-calc-results {
+            background: linear-gradient(135deg, rgba(241, 154, 95, 0.08) 0%, rgba(241, 154, 95, 0.04) 100%);
+            border: 1px solid rgba(241, 154, 95, 0.2);
+            border-radius: 6px;
+            padding: 20px;
+            margin-top: 24px;
+        }
+
+        .dog-calc-result-item {
+            display: flex;
+            justify-content: space-between;
+            align-items: center;
+            margin-bottom: 12px;
+        }
+
+        .dog-calc-result-item:last-child {
+            margin-bottom: 0;
+        }
+
+        .dog-calc-result-label {
+            font-weight: 500;
+            color: #6f3f6d;
+            font-size: 0.95rem;
+        }
+
+        .dog-calc-result-value {
+            font-weight: 600;
+            color: #6f3f6d;
+            font-size: 1.1rem;
+            padding: 4px 12px;
+            background: rgba(241, 154, 95, 0.15);
+            border-radius: 4px;
+        }
+
+        .dog-calc-collapsible {
+            background: #ffffff;
+            border: 1px solid #e8e3ed;
+            border-radius: 8px;
+            margin-bottom: 24px;
+            overflow: hidden;
+            box-shadow: 0 3px 6px rgba(0, 0, 0, 0.08);
+        }
+
+        .dog-calc-collapsible-header {
+            background: #f8f5fa;
+            padding: 20px 24px;
+            cursor: pointer;
+            user-select: none;
+            display: flex;
+            justify-content: space-between;
+            align-items: center;
+            border-bottom: 1px solid #e8e3ed;
+            transition: background-color 0.2s ease;
+        }
+
+        .dog-calc-collapsible-header:hover {
+            background: #f5f1f6;
+        }
+
+        .dog-calc-collapsible-header h3 {
+            margin: 0;
+            font-size: 1.25rem;
+            color: #6f3f6d;
+            font-weight: 600;
+        }
+
+        .dog-calc-collapsible-arrow {
+            transition: transform 0.2s ease;
+            font-size: 1.2rem;
+            color: #9f5999;
+        }
+
+        .dog-calc-collapsible.active .dog-calc-collapsible-arrow {
+            transform: rotate(180deg);
+        }
+
+        .dog-calc-collapsible-content {
+            max-height: 0;
+            overflow: hidden;
+            transition: max-height 0.3s ease;
+        }
+
+        .dog-calc-collapsible.active .dog-calc-collapsible-content {
+            max-height: 1000px;
+        }
+
+        .dog-calc-collapsible-inner {
+            padding: 24px;
+        }
+
+        .dog-calc-input-group {
+            display: flex;
+            gap: 16px;
+            align-items: flex-end;
+        }
+
+        .dog-calc-input-group .dog-calc-form-group {
+            flex: 1;
+            margin-bottom: 0;
+        }
+
+        .dog-calc-unit-select {
+            min-width: 120px;
+        }
+
+        .dog-calc-error {
+            color: #e87159;
+            font-size: 0.875rem;
+            margin-top: 6px;
+            font-weight: 500;
+        }
+
+        .dog-calc-hidden {
+            display: none !important;
+        }
+
+        .dog-calc-footer {
+            text-align: center;
+            padding: 16px 0;
+            border-top: 1px solid #e8e3ed;
+            margin-top: 24px;
+        }
+
+        .dog-calc-footer a {
+            color: #9f5999;
+            text-decoration: none;
+            font-size: 0.9rem;
+            font-weight: 500;
+            transition: color 0.2s ease;
+        }
+
+        .dog-calc-footer a:hover {
+            color: #f19a5f;
+            text-decoration: underline;
+        }
+
+        @media (max-width: 576px) {
+            .dog-calc-widget {
+                padding: 16px;
+            }
+
+            .dog-calc-section,
+            .dog-calc-collapsible-inner {
+                padding: 20px;
+            }
+
+            .dog-calc-section h2,
+            .dog-calc-collapsible-header h3 {
+                font-size: 1.3rem;
+            }
+
+            .dog-calc-input-group {
+                flex-direction: column;
+                gap: 20px;
+            }
+
+            .dog-calc-input-group .dog-calc-form-group {
+                margin-bottom: 20px;
+            }
+
+            .dog-calc-result-item {
+                flex-direction: column;
+                align-items: flex-start;
+                gap: 8px;
+            }
+
+            .dog-calc-result-value {
+                align-self: stretch;
+                text-align: center;
+            }
+
+            .dog-calc-collapsible-header {
+                padding: 16px 20px;
+            }
+        }
+
+        @media (prefers-color-scheme: dark) {
+            .dog-calc-widget {
+                color: #f5f3f7;
+            }
+            
+            .dog-calc-section,
+            .dog-calc-collapsible {
+                background: #24202d;
+                border-color: #433c4f;
+            }
+            
+            .dog-calc-collapsible-header {
+                background: #312b3b;
+                border-color: #433c4f;
+            }
+            
+            .dog-calc-collapsible-header:hover {
+                background: #3a3446;
+            }
+            
+            .dog-calc-section h2,
+            .dog-calc-collapsible-header h3,
+            .dog-calc-form-group label,
+            .dog-calc-result-label {
+                color: #f5f3f7;
+            }
+            
+            .dog-calc-form-group select,
+            .dog-calc-form-group input[type="number"],
+            .dog-calc-form-group input[type="text"] {
+                background-color: #312b3b;
+                border-color: #433c4f;
+                color: #f5f3f7;
+                background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23f5f3f7' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
+            }
+            
+            .dog-calc-form-group select option {
+                background-color: #312b3b;
+                color: #f5f3f7;
+            }
+            
+            .dog-calc-form-group select:focus,
+            .dog-calc-form-group input[type="number"]:focus,
+            .dog-calc-form-group input[type="text"]:focus {
+                background-color: #312b3b;
+                border-color: #f19a5f;
+            }
+            
+            .dog-calc-form-group input[readonly] {
+                background-color: #433c4f;
+                color: #b8b0c2;
+            }
+            
+            .dog-calc-results {
+                background: linear-gradient(135deg, rgba(241, 154, 95, 0.15) 0%, rgba(241, 154, 95, 0.08) 100%);
+                border-color: rgba(241, 154, 95, 0.3);
+            }
+            
+            .dog-calc-result-value {
+                color: #f5f3f7;
+                background: rgba(241, 154, 95, 0.2);
+            }
+            
+            .dog-calc-footer {
+                border-color: #433c4f;
+            }
+        }
+    `;
+
+    // Widget HTML template
+    const widgetTemplate = `
+        <div class="dog-calc-widget">
+            <div class="dog-calc-section">
+                <h2>Dog's Characteristics</h2>
+                
+                <div class="dog-calc-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="dog-calc-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="dog-calc-error dog-calc-hidden">Please enter a valid weight (minimum 0.1 kg)</div>
+                </div>
+
+                <div class="dog-calc-results" id="calorieResults" style="display: none;">
+                    <div class="dog-calc-result-item">
+                        <span class="dog-calc-result-label">Resting Energy Requirement (RER):</span>
+                        <span class="dog-calc-result-value" id="rerValue">- cal/day</span>
+                    </div>
+                    <div class="dog-calc-result-item">
+                        <span class="dog-calc-result-label">Maintenance Energy Requirement (MER):</span>
+                        <span class="dog-calc-result-value" id="merValue">- cal/day</span>
+                    </div>
+                </div>
+            </div>
+
+            <div class="dog-calc-collapsible" id="foodCalculator">
+                <div class="dog-calc-collapsible-header">
+                    <h3>How much food is that?</h3>
+                    <span class="dog-calc-collapsible-arrow">▼</span>
+                </div>
+                <div class="dog-calc-collapsible-content">
+                    <div class="dog-calc-collapsible-inner">
+                        <div class="dog-calc-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="dog-calc-error dog-calc-hidden">Please enter a valid energy content (minimum 1 kcal/100g)</div>
+                        </div>
+
+                        <div class="dog-calc-results" id="dailyFoodResults" style="display: none;">
+                            <div class="dog-calc-result-item">
+                                <span class="dog-calc-result-label">Daily Food Amount:</span>
+                                <span class="dog-calc-result-value" id="dailyFoodValue">- g/day</span>
+                            </div>
+                        </div>
+
+                        <div class="dog-calc-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="dog-calc-error dog-calc-hidden">Please enter a valid number of days (minimum 1)</div>
+                        </div>
+
+                        <div class="dog-calc-input-group">
+                            <div class="dog-calc-form-group">
+                                <label for="totalFoodDisplay">Total Food Amount:</label>
+                                <input type="text" id="totalFoodDisplay" readonly>
+                            </div>
+                            <div class="dog-calc-form-group">
+                                <label for="unit">Unit:</label>
+                                <select id="unit" class="dog-calc-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 class="dog-calc-footer">
+                <a href="https://caninenutritionandwellness.com" target="_blank" rel="noopener noreferrer">
+                    by caninenutritionandwellness.com
+                </a>
+            </div>
+        </div>
+    `;
+
+    // Calculator class
+    class DogCalorieCalculatorWidget {
+        constructor(container) {
+            this.container = container;
+            this.currentMER = 0;
+            this.init();
+        }
+
+        init() {
+            this.injectStyles();
+            this.injectHTML();
+            this.bindEvents();
+        }
+
+        injectStyles() {
+            if (!document.getElementById('dog-calc-widget-styles')) {
+                const style = document.createElement('style');
+                style.id = 'dog-calc-widget-styles';
+                style.textContent = widgetStyles;
+                document.head.appendChild(style);
+            }
+        }
+
+        injectHTML() {
+            this.container.innerHTML = widgetTemplate;
+        }
+
+        bindEvents() {
+            const weightInput = this.container.querySelector('#weight');
+            const dogTypeSelect = this.container.querySelector('#dogType');
+            const foodEnergyInput = this.container.querySelector('#foodEnergy');
+            const daysInput = this.container.querySelector('#days');
+            const unitSelect = this.container.querySelector('#unit');
+            const collapsibleHeader = this.container.querySelector('.dog-calc-collapsible-header');
+
+            if (weightInput) {
+                weightInput.addEventListener('input', () => this.updateCalorieCalculations());
+                weightInput.addEventListener('blur', () => this.validateWeight());
+            }
+            
+            if (dogTypeSelect) dogTypeSelect.addEventListener('change', () => this.updateCalorieCalculations());
+            
+            if (foodEnergyInput) {
+                foodEnergyInput.addEventListener('input', () => this.updateFoodCalculations());
+                foodEnergyInput.addEventListener('blur', () => this.validateFoodEnergy());
+            }
+            
+            if (daysInput) {
+                daysInput.addEventListener('input', () => this.updateFoodCalculations());
+                daysInput.addEventListener('blur', () => this.validateDays());
+            }
+            
+            if (unitSelect) unitSelect.addEventListener('change', () => this.updateFoodCalculations());
+            
+            if (collapsibleHeader) {
+                collapsibleHeader.addEventListener('click', () => this.toggleCollapsible());
+            }
+        }
+
+        toggleCollapsible() {
+            const collapsible = this.container.querySelector('.dog-calc-collapsible');
+            if (collapsible) {
+                collapsible.classList.toggle('active');
+            }
+        }
+
+        calculateRER(weightKg) {
+            return 70 * Math.pow(weightKg, 0.75);
+        }
+
+        calculateMER(rer, factor) {
+            return rer * factor;
+        }
+
+        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;
+        }
+
+        showError(elementId, show = true) {
+            const errorElement = this.container.querySelector('#' + elementId);
+            if (errorElement) {
+                if (show) {
+                    errorElement.classList.remove('dog-calc-hidden');
+                } else {
+                    errorElement.classList.add('dog-calc-hidden');
+                }
+            }
+        }
+
+        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;
+            }
+        }
+
+        formatNumber(num, decimals = 0) {
+            return num.toFixed(decimals).replace(/\.?0+$/, '');
+        }
+
+        validateWeight() {
+            const weight = this.container.querySelector('#weight')?.value;
+            if (weight && !this.validateInput(weight, 0.1)) {
+                this.showError('weightError', true);
+            } else {
+                this.showError('weightError', false);
+            }
+        }
+
+        validateFoodEnergy() {
+            const energy = this.container.querySelector('#foodEnergy')?.value;
+            if (energy && !this.validateInput(energy, 1)) {
+                this.showError('foodEnergyError', true);
+            } else {
+                this.showError('foodEnergyError', false);
+            }
+        }
+
+        validateDays() {
+            const days = this.container.querySelector('#days')?.value;
+            if (days && !this.validateInput(days, 1, true)) {
+                this.showError('daysError', true);
+            } else {
+                this.showError('daysError', false);
+            }
+        }
+
+        updateCalorieCalculations() {
+            const weightInput = this.container.querySelector('#weight');
+            const dogTypeSelect = this.container.querySelector('#dogType');
+            const calorieResults = this.container.querySelector('#calorieResults');
+            const rerValue = this.container.querySelector('#rerValue');
+            const merValue = this.container.querySelector('#merValue');
+
+            if (!weightInput || !dogTypeSelect || !calorieResults || !rerValue || !merValue) {
+                return;
+            }
+
+            const weight = weightInput.value;
+            const dogTypeFactor = dogTypeSelect.value;
+            
+            this.showError('weightError', false);
+            
+            if (!weight || !this.validateInput(weight, 0.1)) {
+                if (weight) this.showError('weightError', true);
+                calorieResults.style.display = 'none';
+                return;
+            }
+
+            if (!dogTypeFactor) {
+                calorieResults.style.display = 'none';
+                return;
+            }
+
+            const weightKg = parseFloat(weight);
+            const factor = parseFloat(dogTypeFactor);
+            
+            const rer = this.calculateRER(weightKg);
+            const mer = this.calculateMER(rer, factor);
+            
+            this.currentMER = mer;
+            
+            rerValue.textContent = this.formatNumber(rer, 0) + ' cal/day';
+            merValue.textContent = this.formatNumber(mer, 0) + ' cal/day';
+            calorieResults.style.display = 'block';
+            
+            this.updateFoodCalculations();
+        }
+
+        updateFoodCalculations() {
+            if (this.currentMER === 0) return;
+            
+            const foodEnergyInput = this.container.querySelector('#foodEnergy');
+            const daysInput = this.container.querySelector('#days');
+            const unitSelect = this.container.querySelector('#unit');
+            const dailyFoodResults = this.container.querySelector('#dailyFoodResults');
+            const dailyFoodValue = this.container.querySelector('#dailyFoodValue');
+            const totalFoodDisplay = this.container.querySelector('#totalFoodDisplay');
+
+            if (!foodEnergyInput || !daysInput || !unitSelect || !dailyFoodResults || !dailyFoodValue || !totalFoodDisplay) {
+                return;
+            }
+
+            const foodEnergy = foodEnergyInput.value;
+            const days = daysInput.value;
+            const unit = unitSelect.value;
+            
+            this.showError('foodEnergyError', false);
+            this.showError('daysError', false);
+            
+            if (!foodEnergy || !this.validateInput(foodEnergy, 1)) {
+                if (foodEnergy) this.showError('foodEnergyError', true);
+                dailyFoodResults.style.display = 'none';
+                totalFoodDisplay.value = '';
+                return;
+            }
+
+            if (!days || !this.validateInput(days, 1, true)) {
+                if (days) this.showError('daysError', true);
+                totalFoodDisplay.value = '';
+                return;
+            }
+
+            const energyPer100g = parseFloat(foodEnergy);
+            const numDays = parseInt(days);
+            
+            const dailyFoodGrams = (this.currentMER / energyPer100g) * 100;
+            const totalFoodGrams = dailyFoodGrams * numDays;
+            
+            dailyFoodValue.textContent = this.formatNumber(dailyFoodGrams, 1) + ' g/day';
+            dailyFoodResults.style.display = 'block';
+            
+            const convertedAmount = this.convertUnits(totalFoodGrams, unit);
+            const unitLabel = unit === 'g' ? 'g' : unit === 'kg' ? 'kg' : unit === 'oz' ? 'oz' : 'lb';
+            const decimals = unit === 'g' ? 0 : unit === 'kg' ? 2 : 1;
+            
+            totalFoodDisplay.value = this.formatNumber(convertedAmount, decimals) + ' ' + unitLabel;
+        }
+    }
+
+    // Auto-initialize widget
+    function initDogCalorieCalculator() {
+        const containers = document.querySelectorAll('#dog-calorie-calculator, .dog-calorie-calculator');
+        containers.forEach(container => {
+            if (!container.dataset.initialized) {
+                new DogCalorieCalculatorWidget(container);
+                container.dataset.initialized = 'true';
+            }
+        });
+    }
+
+    // Initialize when DOM is ready
+    if (document.readyState === 'loading') {
+        document.addEventListener('DOMContentLoaded', initDogCalorieCalculator);
+    } else {
+        initDogCalorieCalculator();
+    }
+
+    // Expose for manual initialization
+    window.DogCalorieCalculatorWidget = DogCalorieCalculatorWidget;
+
+})();

iframe.html

@@ -0,0 +1,179 @@
+<!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 - Canine Nutrition and Wellness</title>
+    <link rel="stylesheet" href="styles.css">
+    <style>
+        /* iframe-specific optimizations */
+        body {
+            margin: 0;
+            padding: 0;
+            background: transparent;
+            overflow-x: hidden;
+        }
+        
+        .dog-calculator-container {
+            margin: 0;
+            max-width: none;
+            padding: 16px;
+        }
+        
+        /* Ensure proper sizing for iframe */
+        html, body {
+            height: auto;
+            min-height: 100%;
+        }
+        
+        /* iframe communication styles */
+        .dog-calculator-container {
+            opacity: 0;
+            transition: opacity 0.3s ease;
+        }
+        
+        .dog-calculator-container.loaded {
+            opacity: 1;
+        }
+    </style>
+</head>
+<body>
+    <div class="dog-calculator-container" id="dogCalculator">
+        <div class="dog-calculator-section">
+            <h2>Dog's Characteristics</h2>
+            
+            <div class="dog-calculator-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="dog-calculator-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="dog-calculator-error dog-calculator-hidden">Please enter a valid weight (minimum 0.1 kg)</div>
+            </div>
+
+            <div class="dog-calculator-results" id="calorieResults" style="display: none;">
+                <div class="dog-calculator-result-item">
+                    <span class="dog-calculator-result-label">Resting Energy Requirement (RER):</span>
+                    <span class="dog-calculator-result-value" id="rerValue">- cal/day</span>
+                </div>
+                <div class="dog-calculator-result-item">
+                    <span class="dog-calculator-result-label">Maintenance Energy Requirement (MER):</span>
+                    <span class="dog-calculator-result-value" id="merValue">- cal/day</span>
+                </div>
+            </div>
+        </div>
+
+        <div class="dog-calculator-collapsible" id="foodCalculator">
+            <div class="dog-calculator-collapsible-header" onclick="toggleCollapsible('foodCalculator')">
+                <h3>How much food is that?</h3>
+                <span class="dog-calculator-collapsible-arrow">▼</span>
+            </div>
+            <div class="dog-calculator-collapsible-content">
+                <div class="dog-calculator-collapsible-inner">
+                    <div class="dog-calculator-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="dog-calculator-error dog-calculator-hidden">Please enter a valid energy content (minimum 1 kcal/100g)</div>
+                    </div>
+
+                    <div class="dog-calculator-results" id="dailyFoodResults" style="display: none;">
+                        <div class="dog-calculator-result-item">
+                            <span class="dog-calculator-result-label">Daily Food Amount:</span>
+                            <span class="dog-calculator-result-value" id="dailyFoodValue">- g/day</span>
+                        </div>
+                    </div>
+
+                    <div class="dog-calculator-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="dog-calculator-error dog-calculator-hidden">Please enter a valid number of days (minimum 1)</div>
+                    </div>
+
+                    <div class="dog-calculator-input-group">
+                        <div class="dog-calculator-form-group">
+                            <label for="totalFoodDisplay">Total Food Amount:</label>
+                            <input type="text" id="totalFoodDisplay" readonly>
+                        </div>
+                        <div class="dog-calculator-form-group">
+                            <label for="unit">Unit:</label>
+                            <select id="unit" class="dog-calculator-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 class="dog-calculator-footer">
+            <a href="https://caninenutritionandwellness.com" target="_blank" rel="noopener noreferrer">
+                by caninenutritionandwellness.com
+            </a>
+        </div>
+    </div>
+
+    <script src="calculator.js"></script>
+    <script>
+        // iframe auto-resize functionality
+        function sendHeightToParent() {
+            const height = document.body.scrollHeight;
+            if (window.parent && window.parent !== window) {
+                window.parent.postMessage({
+                    type: 'dogCalculatorResize',
+                    height: height
+                }, '*');
+            }
+        }
+
+        // Send initial height
+        document.addEventListener('DOMContentLoaded', function() {
+            const container = document.getElementById('dogCalculator');
+            container.classList.add('loaded');
+            
+            // Send height after animations complete
+            setTimeout(() => {
+                sendHeightToParent();
+            }, 100);
+            
+            // Monitor for content changes that might affect height
+            const observer = new MutationObserver(() => {
+                setTimeout(sendHeightToParent, 100);
+            });
+            
+            observer.observe(document.body, {
+                childList: true,
+                subtree: true,
+                attributes: true
+            });
+            
+            // Send height on window resize
+            window.addEventListener('resize', sendHeightToParent);
+        });
+
+        // Override the toggleCollapsible function to handle resize
+        const originalToggleCollapsible = window.toggleCollapsible;
+        window.toggleCollapsible = function(id) {
+            originalToggleCollapsible(id);
+            setTimeout(sendHeightToParent, 350); // Wait for animation
+        };
+    </script>
+</body>
+</html>

styles.css

@@ -0,0 +1,787 @@
+/* Dog Calorie Calculator Styles */
+/* Using Canine Nutrition and Wellness brand colors and design system */
+
+.dog-calculator-container {
+    max-width: 600px;
+    margin: 0 auto;
+    padding: 24px;
+    font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
+    line-height: 1.5;
+    color: #6f3f6d;
+    box-sizing: border-box;
+}
+
+.dog-calculator-container *,
+.dog-calculator-container *::before,
+.dog-calculator-container *::after {
+    box-sizing: border-box;
+}
+
+.dog-calculator-section {
+    background: #fdfcfe;
+    border: 1px solid #e8e3ed;
+    border-radius: 8px 8px 0 0;
+    padding: 24px;
+    margin-bottom: 0;
+    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.08);
+}
+
+.dog-calculator-section-header {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    margin-bottom: 24px;
+    flex-wrap: wrap;
+    gap: 16px;
+}
+
+.dog-calculator-section h2 {
+    margin: 0;
+    color: #6f3f6d;
+    font-size: 1.5rem;
+    font-weight: 600;
+}
+
+/* Unit Switch */
+.dog-calculator-unit-switch {
+    display: flex;
+    align-items: center;
+    gap: 12px;
+}
+
+.dog-calculator-unit-label {
+    font-size: 0.9rem;
+    font-weight: 500;
+    color: #635870;
+    transition: color 0.2s ease;
+}
+
+.dog-calculator-unit-label.active {
+    color: #6f3f6d;
+    font-weight: 600;
+}
+
+.dog-calculator-switch {
+    position: relative;
+    display: inline-block;
+    width: 48px;
+    height: 24px;
+}
+
+.dog-calculator-switch input {
+    opacity: 0;
+    width: 0;
+    height: 0;
+}
+
+.dog-calculator-slider {
+    position: absolute;
+    cursor: pointer;
+    top: 0;
+    left: 0;
+    right: 0;
+    bottom: 0;
+    background-color: #e8e3ed;
+    transition: 0.3s;
+    border-radius: 24px;
+}
+
+.dog-calculator-slider:before {
+    position: absolute;
+    content: "";
+    height: 18px;
+    width: 18px;
+    left: 3px;
+    bottom: 3px;
+    background-color: white;
+    transition: 0.3s;
+    border-radius: 50%;
+    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
+}
+
+.dog-calculator-switch input:checked + .dog-calculator-slider {
+    background-color: #f19a5f;
+}
+
+.dog-calculator-switch input:checked + .dog-calculator-slider:before {
+    transform: translateX(24px);
+}
+
+.dog-calculator-form-group {
+    margin-bottom: 20px;
+}
+
+.dog-calculator-form-group label {
+    display: block;
+    margin-bottom: 8px;
+    font-weight: 500;
+    color: #6f3f6d;
+    font-size: 1rem;
+}
+
+.dog-calculator-form-group select,
+.dog-calculator-form-group input[type="number"],
+.dog-calculator-form-group input[type="text"] {
+    width: 100%;
+    padding: 12px 16px;
+    border: 1px solid #e8e3ed;
+    border-radius: 6px;
+    font-size: 1rem;
+    font-family: inherit;
+    background-color: #ffffff;
+    color: #6f3f6d;
+    transition: all 0.2s ease;
+    -webkit-appearance: none;
+    -moz-appearance: none;
+    appearance: none;
+    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236f3f6d' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
+    background-repeat: no-repeat;
+    background-position: right 12px center;
+    background-size: 20px;
+    padding-right: 40px;
+}
+
+.dog-calculator-form-group select option {
+    background-color: #ffffff;
+    color: #6f3f6d;
+}
+
+.dog-calculator-form-group input[type="number"],
+.dog-calculator-form-group input[type="text"] {
+    background-image: none;
+    padding-right: 16px;
+}
+
+.dog-calculator-form-group select:focus,
+.dog-calculator-form-group input[type="number"]:focus,
+.dog-calculator-form-group input[type="text"]:focus {
+    outline: none;
+    border-color: #f19a5f;
+    background-color: #ffffff;
+    box-shadow: 0 0 0 3px rgba(241, 154, 95, 0.1);
+}
+
+.dog-calculator-form-group input[readonly] {
+    background-color: #f8f5fa;
+    cursor: not-allowed;
+    color: #635870;
+}
+
+.dog-calculator-results {
+    background: linear-gradient(135deg, rgba(241, 154, 95, 0.08) 0%, rgba(241, 154, 95, 0.04) 100%);
+    border: 1px solid rgba(241, 154, 95, 0.2);
+    border-radius: 6px;
+    padding: 20px;
+    margin-top: 24px;
+}
+
+.dog-calculator-result-item {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    margin-bottom: 12px;
+}
+
+.dog-calculator-result-item:last-child {
+    margin-bottom: 0;
+}
+
+.dog-calculator-result-label {
+    font-weight: 500;
+    color: #6f3f6d;
+    font-size: 0.95rem;
+}
+
+.dog-calculator-result-value {
+    font-weight: 600;
+    color: #6f3f6d;
+    font-size: 1.1rem;
+    padding: 4px 12px;
+    background: rgba(241, 154, 95, 0.15);
+    border-radius: 4px;
+}
+
+.dog-calculator-collapsible {
+    background: #ffffff;
+    border: 1px solid #e8e3ed;
+    border-top: none;
+    margin-bottom: 0;
+    overflow: hidden;
+    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.08);
+}
+
+.dog-calculator-collapsible-header {
+    background: #f8f5fa;
+    padding: 20px 24px;
+    border-bottom: 1px solid #e8e3ed;
+}
+
+.dog-calculator-collapsible-header h3 {
+    margin: 0;
+    font-size: 1.25rem;
+    color: #6f3f6d;
+    font-weight: 600;
+}
+
+.dog-calculator-collapsible-content {
+    display: block;
+}
+
+.dog-calculator-collapsible-inner {
+    padding: 24px;
+}
+
+.dog-calculator-input-group {
+    display: flex;
+    gap: 16px;
+    align-items: flex-end;
+}
+
+.dog-calculator-input-group .dog-calculator-form-group {
+    flex: 1;
+    margin-bottom: 0;
+}
+
+.dog-calculator-unit-select {
+    min-width: 120px;
+}
+
+.dog-calculator-error {
+    color: #e87159;
+    font-size: 0.875rem;
+    margin-top: 6px;
+    font-weight: 500;
+}
+
+.dog-calculator-hidden {
+    display: none;
+}
+
+.dog-calculator-footer {
+    text-align: center;
+    padding: 20px;
+    background: #fdfcfe;
+    border: 1px solid #e8e3ed;
+    border-radius: 0 0 8px 8px;
+    border-top: none;
+    margin-top: -1px;
+}
+
+.dog-calculator-footer a {
+    color: #9f5999;
+    text-decoration: none;
+    font-size: 0.9rem;
+    font-weight: 500;
+    transition: color 0.2s ease;
+}
+
+.dog-calculator-footer a:hover {
+    color: #f19a5f;
+    text-decoration: underline;
+}
+
+/* Action Buttons */
+.dog-calculator-action-buttons {
+    display: flex;
+    justify-content: center;
+    gap: 16px;
+    padding: 20px;
+    background: #f8f5fa;
+    border-left: 1px solid #e8e3ed;
+    border-right: 1px solid #e8e3ed;
+    margin-top: -1px;
+}
+
+.dog-calculator-btn {
+    padding: 8px 16px;
+    border: 1px solid #e8e3ed;
+    border-radius: 6px;
+    font-size: 0.9rem;
+    font-weight: 500;
+    font-family: inherit;
+    cursor: pointer;
+    transition: all 0.2s ease;
+    display: inline-flex;
+    align-items: center;
+    gap: 6px;
+    background: white;
+    color: #6f3f6d;
+}
+
+.dog-calculator-btn:hover {
+    transform: translateY(-1px);
+    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
+}
+
+.dog-calculator-btn-share:hover {
+    border-color: #9f5999;
+    color: #9f5999;
+}
+
+.dog-calculator-btn-embed:hover {
+    border-color: #7fa464;
+    color: #7fa464;
+}
+
+/* Modal Styles */
+.dog-calculator-modal {
+    display: none;
+    position: fixed;
+    z-index: 10000;
+    left: 0;
+    top: 0;
+    width: 100%;
+    height: 100%;
+    background-color: rgba(0, 0, 0, 0.5);
+    animation: fadeIn 0.3s ease;
+}
+
+@keyframes fadeIn {
+    from { opacity: 0; }
+    to { opacity: 1; }
+}
+
+.dog-calculator-modal-content {
+    position: relative;
+    background-color: #ffffff;
+    margin: 5% auto;
+    padding: 30px;
+    border: 1px solid #e8e3ed;
+    border-radius: 12px;
+    width: 90%;
+    max-width: 500px;
+    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
+    animation: slideIn 0.3s ease;
+}
+
+.dog-calculator-modal-embed {
+    max-width: 700px;
+}
+
+@keyframes slideIn {
+    from { 
+        opacity: 0;
+        transform: translateY(-20px);
+    }
+    to { 
+        opacity: 1;
+        transform: translateY(0);
+    }
+}
+
+.dog-calculator-modal-close {
+    position: absolute;
+    right: 20px;
+    top: 20px;
+    font-size: 28px;
+    font-weight: 300;
+    color: #6f3f6d;
+    cursor: pointer;
+    transition: color 0.2s ease;
+}
+
+.dog-calculator-modal-close:hover {
+    color: #f19a5f;
+}
+
+.dog-calculator-modal h3 {
+    margin: 0 0 24px 0;
+    color: #6f3f6d;
+    font-size: 1.5rem;
+    display: flex;
+    align-items: center;
+    gap: 12px;
+}
+
+/* Share Modal */
+.dog-calculator-share-buttons {
+    display: grid;
+    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
+    gap: 12px;
+    margin-bottom: 20px;
+}
+
+.dog-calculator-share-btn {
+    padding: 12px 16px;
+    border: none;
+    border-radius: 6px;
+    font-size: 0.9rem;
+    font-weight: 500;
+    color: white;
+    cursor: pointer;
+    transition: all 0.2s ease;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    gap: 8px;
+    font-family: inherit;
+}
+
+.dog-calculator-share-facebook {
+    background: #1877f2;
+}
+
+.dog-calculator-share-facebook:hover {
+    background: #1664d1;
+    transform: translateY(-1px);
+}
+
+.dog-calculator-share-twitter {
+    background: #1da1f2;
+}
+
+.dog-calculator-share-twitter:hover {
+    background: #1991da;
+    transform: translateY(-1px);
+}
+
+.dog-calculator-share-linkedin {
+    background: #0a66c2;
+}
+
+.dog-calculator-share-linkedin:hover {
+    background: #084d95;
+    transform: translateY(-1px);
+}
+
+.dog-calculator-share-email {
+    background: #6f3f6d;
+}
+
+.dog-calculator-share-email:hover {
+    background: #5a3357;
+    transform: translateY(-1px);
+}
+
+.dog-calculator-share-copy {
+    background: #f19a5f;
+}
+
+.dog-calculator-share-copy:hover {
+    background: #e87741;
+    transform: translateY(-1px);
+}
+
+.dog-calculator-share-url {
+    display: flex;
+    gap: 12px;
+}
+
+.dog-calculator-share-url input {
+    flex: 1;
+    padding: 10px 16px;
+    border: 1px solid #e8e3ed;
+    border-radius: 6px;
+    font-size: 0.9rem;
+    font-family: monospace;
+    background: #f8f5fa;
+    color: #6f3f6d;
+}
+
+/* Embed Modal */
+.dog-calculator-embed-options {
+    display: flex;
+    flex-direction: column;
+    gap: 24px;
+}
+
+.dog-calculator-embed-option {
+    border: 1px solid #e8e3ed;
+    border-radius: 8px;
+    padding: 20px;
+    background: #fcfafd;
+}
+
+.dog-calculator-embed-option h4 {
+    margin: 0 0 8px 0;
+    color: #6f3f6d;
+    font-size: 1.1rem;
+    display: flex;
+    align-items: center;
+    gap: 8px;
+}
+
+.dog-calculator-embed-option p {
+    margin: 0 0 16px 0;
+    color: #635870;
+    font-size: 0.9rem;
+}
+
+.dog-calculator-code-container {
+    position: relative;
+    background: #312b3b;
+    border-radius: 6px;
+    overflow: hidden;
+}
+
+.dog-calculator-code-container pre {
+    margin: 0;
+    padding: 16px;
+    overflow-x: auto;
+}
+
+.dog-calculator-code-container code {
+    color: #f5f3f7;
+    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
+    font-size: 0.85rem;
+    line-height: 1.4;
+}
+
+.dog-calculator-copy-btn {
+    position: absolute;
+    top: 10px;
+    right: 10px;
+    padding: 6px 12px;
+    background: #f19a5f;
+    color: white;
+    border: none;
+    border-radius: 4px;
+    font-size: 0.85rem;
+    font-weight: 500;
+    cursor: pointer;
+    transition: all 0.2s ease;
+    display: flex;
+    align-items: center;
+    gap: 6px;
+    font-family: inherit;
+}
+
+.dog-calculator-copy-btn:hover {
+    background: #e87741;
+}
+
+.dog-calculator-copy-btn.copied {
+    background: #7fa464;
+}
+
+.dog-calculator-copy-btn.copied:hover {
+    background: #7fa464;
+}
+
+/* Mobile Responsive Design */
+@media (max-width: 576px) {
+    .dog-calculator-container {
+        padding: 16px;
+    }
+
+    .dog-calculator-section,
+    .dog-calculator-collapsible-inner {
+        padding: 20px;
+    }
+
+    .dog-calculator-section h2,
+    .dog-calculator-collapsible-header h3 {
+        font-size: 1.3rem;
+    }
+
+    .dog-calculator-section-header {
+        flex-direction: column;
+        align-items: stretch;
+        gap: 12px;
+    }
+
+    .dog-calculator-section h2 {
+        text-align: center;
+    }
+
+    .dog-calculator-unit-switch {
+        justify-content: center;
+    }
+
+    .dog-calculator-action-buttons {
+        flex-direction: column;
+        padding: 16px;
+    }
+
+    .dog-calculator-btn {
+        width: 100%;
+        justify-content: center;
+    }
+
+    .dog-calculator-input-group {
+        flex-direction: column;
+        gap: 20px;
+    }
+
+    .dog-calculator-input-group .dog-calculator-form-group {
+        margin-bottom: 20px;
+    }
+
+    .dog-calculator-result-item {
+        flex-direction: column;
+        align-items: flex-start;
+        gap: 8px;
+    }
+
+    .dog-calculator-result-value {
+        align-self: stretch;
+        text-align: center;
+    }
+
+    .dog-calculator-collapsible-header {
+        padding: 16px 20px;
+    }
+
+    .dog-calculator-modal-content {
+        margin: 10% auto;
+        padding: 20px;
+        width: 95%;
+    }
+
+    .dog-calculator-share-buttons {
+        grid-template-columns: 1fr;
+    }
+
+    .dog-calculator-embed-option {
+        padding: 16px;
+    }
+
+    .dog-calculator-code-container pre {
+        padding: 12px;
+        font-size: 0.75rem;
+    }
+}
+
+/* Dark theme support */
+@media (prefers-color-scheme: dark) {
+    .dog-calculator-container {
+        color: #f5f3f7;
+    }
+    
+    .dog-calculator-section,
+    .dog-calculator-collapsible {
+        background: #24202d;
+        border-color: #433c4f;
+    }
+    
+    .dog-calculator-collapsible-header {
+        background: #312b3b;
+        border-color: #433c4f;
+    }
+    
+    .dog-calculator-collapsible-header:hover {
+        background: #3a3446;
+    }
+    
+    .dog-calculator-section h2,
+    .dog-calculator-collapsible-header h3,
+    .dog-calculator-form-group label,
+    .dog-calculator-result-label {
+        color: #f5f3f7;
+    }
+
+    .dog-calculator-unit-label {
+        color: #b8b0c2;
+    }
+
+    .dog-calculator-unit-label.active {
+        color: #f5f3f7;
+    }
+
+    .dog-calculator-slider {
+        background-color: #433c4f;
+    }
+    
+    .dog-calculator-form-group select,
+    .dog-calculator-form-group input[type="number"],
+    .dog-calculator-form-group input[type="text"] {
+        background-color: #312b3b;
+        border-color: #433c4f;
+        color: #f5f3f7;
+        background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23f5f3f7' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
+    }
+    
+    .dog-calculator-form-group select option {
+        background-color: #312b3b;
+        color: #f5f3f7;
+    }
+    
+    .dog-calculator-form-group select:focus,
+    .dog-calculator-form-group input[type="number"]:focus,
+    .dog-calculator-form-group input[type="text"]:focus {
+        background-color: #312b3b;
+        border-color: #f19a5f;
+    }
+    
+    .dog-calculator-form-group input[readonly] {
+        background-color: #433c4f;
+        color: #b8b0c2;
+    }
+    
+    .dog-calculator-results {
+        background: linear-gradient(135deg, rgba(241, 154, 95, 0.15) 0%, rgba(241, 154, 95, 0.08) 100%);
+        border-color: rgba(241, 154, 95, 0.3);
+    }
+    
+    .dog-calculator-result-value {
+        color: #f5f3f7;
+        background: rgba(241, 154, 95, 0.2);
+    }
+    
+    .dog-calculator-footer {
+        background: #24202d;
+        border-color: #433c4f;
+    }
+
+    .dog-calculator-action-buttons {
+        background: #312b3b;
+        border-color: #433c4f;
+    }
+
+    .dog-calculator-btn {
+        background: #433c4f;
+        border-color: #433c4f;
+        color: #f5f3f7;
+    }
+
+    .dog-calculator-btn:hover {
+        background: #524a5f;
+        border-color: #524a5f;
+    }
+
+    .dog-calculator-btn-share:hover {
+        border-color: #9f5999;
+        color: #f19a5f;
+    }
+
+    .dog-calculator-btn-embed:hover {
+        border-color: #7fa464;
+        color: #7fa464;
+    }
+
+    .dog-calculator-modal-content {
+        background-color: #24202d;
+        border-color: #433c4f;
+    }
+
+    .dog-calculator-modal h3 {
+        color: #f5f3f7;
+    }
+
+    .dog-calculator-modal-close {
+        color: #f5f3f7;
+    }
+
+    .dog-calculator-modal-close:hover {
+        color: #f19a5f;
+    }
+
+    .dog-calculator-share-url input {
+        background: #312b3b;
+        border-color: #433c4f;
+        color: #f5f3f7;
+    }
+
+    .dog-calculator-embed-option {
+        background: #312b3b;
+        border-color: #433c4f;
+    }
+
+    .dog-calculator-embed-option h4 {
+        color: #f5f3f7;
+    }
+
+    .dog-calculator-embed-option p {
+        color: #b8b0c2;
+    }
+}