body {
    display: grid;
    min-height: 100vh;
    margin: 0;
    padding: 0;
}

.container {
    display: flex;
    justify-content: center;
    margin: auto;
    width: 100%;
    max-width: 960px;
}

.column {
    background-color: hsl(0, 0%, 90%);
    margin: 0 15px;
    padding: 15px;
    max-width: 50%;
    width: 360px;
    height: 560px;
    border-radius: 10px;
}

.card {
    background-color: white;
    padding-top: calc(100% / 16 * 9);
    width: 100%;
    border-radius: 8px;
    box-shadow: 0 0 10px hsla(0, 0%, 0%, 0.10);
}

.card:not(:first-child) {
    margin-top: 16px;
}