body {
    background-color: azure;
    line-height: 1.618;
}
section,img {
    width: 100%;
}
.container {
    margin: 0 auto;
    max-width: 800px;
}
h1 {
    font-size: 40px;
    padding: 32px 0;
}
.grid-box {
    display: grid;
    grid-template-columns: repeat(auto-fit, 30%);
    row-gap: 20px;
    justify-content: space-between;
}