html, body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;

    background-color: aliceblue;
}

header {
    font-family: "Kiwi Maru", serif;
    font-weight: 400;
    min-height: 160px;
}

main {
    font-family: "Noto Sans JP", sans-serif;
    font-optical-sizing: auto;
    font-weight: 400;
    font-style: normal;
    height: auto;
    min-height: 100%;
    background-color: white;
    border-radius: 10px;
    margin: 0 20px;
    padding: 30px;
}

footer {
    font-family: "Kiwi Maru", serif;
    font-weight: 540;
    padding-top: 10px;
}