header {
    width: 100%;
    height: 55px;
    padding: 0 40px;
    background-color: gray;

    display: flex;
    align-items: center;
    justify-content: space-between;
}

header #left .image_container {
    border-radius: 10px;
}

header #left .image_container img {
    width: 100%;
    height: 100%;
}

header #right {
    background-color: red;
}

main {
    width: 100%;
    min-height: 100vh;
    background-color: white;
}

footer {
    width: 100%;
    height: 150px;
    background-color: gray;
}