body {
    font-family: Arial, sans-serif;
    padding: 0;
    min-height: 100vh;
    margin: 0;
    background-color: #f4f4f4;
    display: flex;
    flex-direction: column;
}

header {
    min-height:50px;
    background: #007bff;
    color: #ffffff;
    padding: 20px;
    text-align: center;
}

main {
    padding: 20px;
    flex: 1;
}

footer {
    text-align: center;
    background: #007bff;
    color: white;
    width: 100%;
    bottom: 0;
    min-height: 50px;
}