style.css

:root {
    font-size: 16px;
    --color-primary: #1a9f60;
    --color-lightGrey: #d2d6dd;
    --color-grey: #7e818b;
    --color-darkGrey: #3f4144;
    --color-error: #d43939;
    --color-success: #28bd14;
    --grid-maxWidth: 120rem;
    --grid-gutter: 2rem;
    font-family: -apple-system, BlinkMacSystemFont, Avenir, "Avenir Next",
                   "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans",
                   "Droid Sans", "Helvetica Neue", sans-serif;

}

body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

body>main {
    margin-left: 3rem;
    margin-right: 3rem;
}

main#page-main {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    flex-basis: 80vh;
    flex-grow: 5;
}

main  card.card {
    flex-basis: 300px;
    /* padding: 10px; */
    margin: 5px;
    border: 2px solid gray;
    padding: 0;
}

card.card>main {
    padding:2rem;
}

h1, footer {
    text-align: center;
}


header {
    background-color: var(--color-primary);
}

footer {
    background-color: var(--color-lightGrey);
    flex-grow: 3;
}

:root {
}