Mobile first approach using html,css and js

Hey, awesome work on this one. Though I had to zoom out to see the desktop layout, are you using wide screen? I am using 1366x768 resolution and upon seeing the css, you are using 1440px as a breakpoint which is too big for all mobile layout to occupy. The 1440px on the design does not mean it is a breakpoint, it is just the size where the layout is created and not related to breakpoint. Also it is kind of confusing on why you did this since you started on mobile first approach which should not be the case. The mobile layout however looks great.

Some other suggestions would be:

• It would be great to have a base styling with these properties

html {
  box-sizing: border-box;
  font-size: 100%;
}
*,
*::before,
*::after {
  box-sizing: inherit;
}

This way, handling an element's size will be lot easier because of the box-sizing: border-box. You can search up some more of how this works.

• Avoid using height: 100vh on a large container like the body tag as this limits the element's height based on the remaining screen's height. Instead use min-height: 100vh, this takes full height but lets the element expand if needed.
• Also don't add width: 100vw as this adds an extra horizontal scroll since this doesn't account the scrollbar's size.
• The element usage on the small-blue-section-text is not correct. When wrapping a text-content do not just use div to wrap it, use meaningful element like a p tag if it just a regular text or heading tag if it is an heading.
• The error-icon img should be using an alt. Always remember to include the alt attribute of the img element even if it is empty or not. If you don't screen-reader will read the source path of the img which you don't want.
• Right now, the error-messages can only be seen by sighted users since it is not properly linked up on the input element. A pseudocode of a form or just an input in general when it is error should look like:

if ( input is wrong )
  input.setAttribute("aria-invalid", "true");
  input.setAttribute("aria-describedBy", id of the error-message);
else 
  input.removeAttribute("aria-invalid");
  input.removeAttribute("aria-describedBy");

The error-message element should have an id attribute which will be or is referenced by the aria-describedBy attribute on the input element. By doing this, you users will know what kind of error they had made because of the aria-describedBy that points to the error-message's content and the users will know that the input is wrong because of the aria-invalid.

• To make it more informative, an addition if you like, you could make an aria-live element that announces if the form submitted is a success or if it has any error. This way users will be informed right away if something is good or bad.
• If you are new to what I mentioned, have a look at this simple accessible form that I have see the usage of the different attributes and how they are used.
• Also I forgot, your input tag lacks an associated label tag on it. Since there are visible-label, the label would be a screen-reader only label, meaning it would make user of like sr-only class. The text-content should describe what the input needs like the value on the placeholder. On what I send, you can see usage of this as well.
• Lastly, the footer should be placed on its own row outside of the main since it is a primary landmark. A typical layout of a site looks like:

<header />
<main />
<footer />

This way, all element that has content are inside their respective landmark elements.

If you need help, just drop it here okay. Aside from those, great job again on this one.

I really appreciate your detailed feedback.I cannot thank you enough.What you've mentioned earlier regarding the 1440 px not being a breakpoint rather it's the layout size,I would like you to explain this a bit,if it's no trouble. Regarding what you mentioned about setting box-sizing:border-box,you are right,I need to find out more about this as I'm seeing it being used in all tutorials. Using proper html tags and adding an alt are such basics,I can't belive to have missed those..lol,will pay more attention. l'll be mindful of the height and width property as well,what you pointed out was great. The error-message attribute (aria-*) is new to me, I'll definetely read more about it. I'll check out the link you've shared too.Thank you so much,your feedback really gave me a lot to check out and learn.Thanks again.