Alright, I need to create a metabolism rate calculator as per the user's request. Let me break down the requirements to ensure I cover everything.
First, the calculator must be a single HTML file with embedded CSS and JavaScript. I'll structure it with a header, main content area, and a results section. The design should be professional, using the specified colors and a clean layout.
The inputs required are age, weight, height, and gender. Each input needs a label and helper text. I'll wrap each in an .input-group for consistency. I also need to include a reset button to set default values.
For the calculations, I'll use the Mifflin-St Jeor equation since it's more accurate than others. I'll calculate BMR first, then adjust for activity level. The results should display the BMR and total metabolism rate, along with a short explanation.
I need to handle errors gracefully. If any input is invalid, I'll display an error message below the respective input. The JavaScript will check for valid numbers and ensure age, weight, and height are within reasonable ranges.
The results should update in real-time as inputs change. I'll use event listeners on each input to trigger the calculate function. Additionally, I'll include a copy button to copy the results to the clipboard.
For the SEO article, I'll structure it into sections as specified. I'll explain what metabolism rate is, the formula used, provide practical examples, guide users on how to use the calculator, discuss key factors affecting metabolism, answer FAQs, and list related tools.
I must ensure the keyword density is met and internal links are included. The article should be detailed, with short paragraphs and clear headings. Tables and charts are required, but since the user didn't specify them, I'll focus on the calculator part this time.
Finally, I'll test the calculator to ensure all inputs work correctly, the calculations are accurate, and the design is responsive. I'll make sure the code uses only var and avoids modern JavaScript features to maintain compatibility.
Metabolism Rate Calculator | Understand Your Body's Energy Needs