Haz lo que hicimos en clase

HTML: CSS:

header{
    background-color: #bbbbbb;
    padding: 20px 0;
}
.caja{
    width: 940px;
    position: relative;
    margin: 0 auto;
}
nav{
    position: absolute;
    right: 0;
    top: 110px;
}
nav li{
    display:inline;
    margin: 0 0 0 15px;
}
nav a{
    color: black;
    font-weight: bold;
    text-decoration: none;
    font-size: 22px;
}
.products{
    width: 940px;
    margin: 0 auto;
    padding: 50px;
}
.products li{
    display: inline-block;
    border: 2px solid black;
    border-radius: 5px;
    text-align: center;
    width: 30%;
    vertical-align: top;  
    margin: 0 1.5%;  
    padding: 30px 20px;
    box-sizing: border-box;
}
.products li:hover{
    border: 2px solid orange;
}

.products h2{
    font-size: 30px;
    font-weight: bold;
}

.description{
    font-size:18px;
}
.cost{
    font-size: 20px;
    font-weight: bold;
    margin-top: 10px;
}