Qr code page using css

Replace<div class="card">with the main tag, <h2> with <h1> and <div class="attribution"> with the footer tag to make the page accessible. click here for more on web-accessibility and semantic html

Every html must have <h1> to make it accessible. Always begin the heading of the html with <h1> tag wrap the sub-heading of <h1> in <h2> tag, wrap the sub-heading of <h2> in <h3> this continues until <h6>, never skip a level of a heading.

Give the alt attribute in the img a value. The value of the alt attribute is the description of the image. For decorative images like icons, there is no need to give it an alt value, for more on alt attribute Click here.

to center .card on the page using flexbox or grid instead of margin,

• USING FLEXBOX: add min-height:100vh; display: flex; align-items: center: justify-content: center; to the body

body{
min-height: 100vh;
display: flex;
align-items: center;
justify-content: center;
}

• USING GRID: add min-height:100vh; display: grid place-items: center to the body

body{
min-height: 100vh;
display: grid;
place-items: center;
}

For a responsive content which wont require a media query for this challenge,

• Give .card a fixed max-width value, a padding value for all the sides and there is no need for the height in .card max-width: 320px which is 20rem/em padding:16px which is 1rem/em
• Give the img a max-width of 100% and a border-radius value, the rest are not needed.

Give h1 and p the same font-size of 15px which is 0.9375rem, text-align: center,the same margin-left, margin-right and margin-top values. Give p a margin bottom value.

Use relative units like rem or em as unit for the padding, margin, width values and preferably rem for the font-size values, instead of using px which is an absolute unit. For more on CSS units Click here and here

Hope am helpful.

Well done for completing this challenge. HAPPY CODING