"Fundamental CSS comprehension" assessment

MDN Learn
8

Hi! Just finished the Fundamental CSS comprehension assessment. May I please have the marking guide so I can check my work? Feedback is also welcomed if anyone has the time. Thanks!

/* 
Specificity of selectors:
    .card article img = 12
    .card footer = 11
    .card header =11
    .card = 10
*/


/* General styles that apply to the entire document */
body {
  margin: 0;
}

html {
  font-family: 'Helvetica neue', Arial, 'sans serif';
  font-size: 10px;
  background-color: #ccc;
}


/* Styles for the container of the card */
.card {
  width: 35em;
  height: 22em;
  margin: 5em auto;
  background-color: red;
  border: 0.2em solid black;
  border-radius: 1.5em;
}

/* Styles for the header/footer of the card */
.card footer {
  background-image: linear-gradient(to bottom,rgba(0,0,0,0), rgba(0,0,0,0.1));
  border-radius: 0 0 1.5em 1.5em;
}

.card header {
  background-image: linear-gradient(to bottom,rgba(0,0,0,0.1), rgba(0,0,0,0));
  border-radius: 1.5em 1.5em 0 0;
}

.card header, .card footer {
    height: 3em;
    padding: 1em;
}

/* Styles for the main content of the card */
.card article img {
  max-height: 100%;
  float: right;
}

.card h2, .card p {
    margin: 0;
}
.card h2 {
    font-size: 2em;
    line-height: 1.5em;
}

.card footer p {
    font-size: 1.5em;
    line-height: 2em;
}

.card article {
    height: 12em;
    background: rgba(0,0,0,0.2);
}

.card article p {
    padding: 1em;
    color: lightgrey;
}