body {
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: stretch;
    background: url("bg.jpg") no-repeat;
    background-size: cover;
}
header {
    color: white;
    text-align: center;
    padding: 10px;
}
footer {
    color: white;
    text-align: center;
    padding: 10px;
    margin-top: 20px;
    max-height: 50px;
}

h2 {
    font-weight: bold;
}
