20/20 Пройдено на 100% но в правильность записи кода не уверена

html, body {
margin: 0;
padding: 0;
font-family: “Arial”, sans-serif;
}

body {
min-width: 550px;
min-height: 250px;
padding: 10px;
}

.cards {
position: relative;
width: 380px;
text-align: left;
}

.cards li {
width: 37px;
height: 55px;
}

.cards li::before {
font-family: “Courier”, monospace;
}

.cards li:not(:first-of-type){
margin-left: -20px;
}

.cards::before {
content: “”;
position: absolute;
right: 0;
top: 0;
display: block;
width: 37px;
height: 55px;
border: 1px dashed #33bb33;
border-radius: 5px;
}

.cards li:first-of-type, .cards li:nth-of-type(5), .cards li:nth-last-of-type(5), .cards li:last-of-type{
background: #ffcc33;
}

.cards:not(:first-of-type) li:nth-of-type(2), .cards:not(:first-of-type) li:nth-of-type(6), .cards:not(:first-of-type) li:nth-of-type(10) {
background: #0099ff;
}

.cards:nth-of-type(2n) li:nth-of-type(4n) {
background: #ff3300;
}

.cards:nth-of-type(3) .spade.ace ~ .heart {
background: #339933;
}

.cards:first-of-type li:nth-of-type(2n) {
background: #996666;
}

Что в вашем коде вам кажется неправильным?