html {
    box-sizing: border-box;
}
*,*:before, *:after {
    box-sizing: inherit
}
html {
    max-width: 960px;
    margin: 0 auto;
    background-color: beige;
}
.topNav {
    max-height: 25px;
    border: 1px solid black;
    border-radius: 25px;
}
/*Header*/
header {
    margin-top: 40px;
    margin-left: 10px;
    margin-right: 10px;
}

/*Cards*/

.cards {
    margin-left: 20px;
    margin-right: 20px;
    display: grid;
    grid-gap: 20px;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}
.card {
    display: flex;
    background: yellow;
    padding: 1.5rem 2rem;
    box-shadow: 0 10px 10px rgba(104, 104, 104, 0.8);
    text-align: center;
    justify-content: center;
}
.tableHeader {
    text-align: center;
}
footer {
    padding: .3em;
    opacity: 60%;
    color: #000;
    text-align: center;
}