body {
    background-color: #f0f0f0;
    font-family: "Lucida Console","Courier New",Courier,monospace;
    font-size: 14px;
}

body, div, img {
    border: 0;
    margin: 0;
    padding: 0;
}

header {
    width: 100%;
    overflow: hidden;
}

#header-bar {
    background-color: #333;
    color: #eee;
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: center;
    padding: 5px 20px 5px 20px;
}

#subheader-bar {
    background-color: #aaa;
    color: #eee;
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: center;
    padding: 5px 20px 5px 20px;
}

nav {
    background-color: #ddd;
    border-bottom: 1px #ccc solid;
    color: #222;
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: space-between;
    padding: 5px 20px 5px 20px;
}

.nav-item {
    background-color: #ddd;
    border: 1px solid #ccc;
    padding: 3px 10px 3px 10px;
    cursor: pointer;
    user-select: none;
}

.nav-item:hover {
    background-color: #eee;
}

main {
    margin: 8px;
}