stats-preview using flex

Replace<div class="card">with the main tag and <div class="attribution"> with the footer tag to fix the accessibility issues. click here for more on web-accessibility and semantic html

There is no need for the <br> in the html.

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.

Use the colors that were given in the styleguide.md found in the zip folder you downloaded.

There is no need to style .card . To center .container on the page using flexbox or grid instead of margin, add min-height:100vh; display: flex; align-items: center: justify-content: center; or min-height:100vh; display: grid place-items: center to the body.

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

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

For the color of the image add mix-bled-mode: multiply and opacity:0.8 to the img.

.img{
background-color: hsl();
}
img{
width: 100%;
height: 100%;
object-fit: cover;
mix-blend-mode: multiply;
opacity: 0.8;
}

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