Испытание: карточка курса [9/18] 100% уфффф

html,
body {
margin: 0;
padding: 0;
}

body {
width: 280px;
min-height: 280px;
padding-top: 20px;
padding-left: 20px;
font-size: 14px;
font-family: “Arial”, sans-serif;
line-height: 1.2;
background: #ecf0f1;
}

.card {
background-color: #1abc9c;
width: 200px;
padding: 20px;
color: #ffffff;
}

span {
font-size: 20px;
}

p { margin-top: 20px;
margin-bottom: 25px;
}

.btn {
display: inline-block;
width: 30px;
height: 30px;
background-color: #16a085;
background-image: url("/assets/course14/social-challenge.png");
background-repeat: no-repeat;
margin-right: 5px;
vertical-align: middle;
}

.tw {
background-position: -30px 0;
}

.gg {
background-position: -60px 0;
}