*{
    box-sizing: border-box;
}

body,
h1,
h2,
h3,
h4,
p{
    margin: 0;
    font-weight: normal;

}

div, header, main, footer {
    margin: 0;
}

.main-preview{
    text-align: center;
    background-color: cadetblue;
    width: 100%;
    height: 80vh;
}

section{
    background-color: darkred;
    margin: auto;
    text-align: center;
    width: 100%;
}
.card {
    text-align: center;
    display: inline-block;
    background-color: saddlebrown;
    margin: 20px 10px 20px 10px;
    padding: 20px;
    height: 600px;
    width: 45%;

}
.card-description{

}