QR code design for everyday use

Replace <h3> with <h1> to fix the accessibility issues.

To center .container on the page using flexbox, replace the height in the body with min-height: 100vh.

To center .container on the page using flexbox:
body{
min-height: 100vh;
display: flex;
align-items: center;
justify-content: center;
}

There is no need to style .image-container. give the img a max-width of 100% instead of a width and height value.

Give h1 the same font-size as p.

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

Hope am helpful.

Well done for completing this challenge. HAPPY CODING