body {
    font-family: 'Apple SD Gothic Neo', 'Malgun Gothic', Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: #f9f9f9;
    color: #222;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}
header {
    background: #003366;
    color: #fff;
    height: 80px;
    display: flex;
    align-items: center;
    box-sizing: border-box;
}
nav ul {
    display: flex;
    align-items: center;
    list-style: none;
    margin: 0;
    padding: 0 0 0 16px;
    height: 80px;
}
nav li {
    margin: 0 18px;
    height: 80px;
    display: flex;
    align-items: center;
}
nav a {
    color: #fff;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.08em;
    padding: 4px 0;
}
nav a:hover {
    text-decoration: underline;
}
.content {
    /* max-width: 1000px; */
    /* margin: 30px auto 70px auto; */
    background: #fff;
    /* border-radius: 6px; */
    /* padding: 30px 24px; */
    /* min-height: 400px; */
    box-shadow: 0 4px 12px rgba(0,0,0,0.04);
    flex: 1;
}
footer {
    background: #222c37;
    color: #aaa;
    text-align: center;
    padding: 10px 0;
    font-size: 14px;
    letter-spacing: 1px;
}