/* Ensure full height of the browser window */
html, body {
    height: 100%;
    margin: 0;
    padding: 0;
}

body {
    display: flex;
    flex-direction: column;
    font-family: Arial, sans-serif;
    text-align: center;
    background-color: #f4f4f9;
}

/* Flex container to expand to fill the available space */
main {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    margin: 20px auto;
    max-width: 800px;
}

/* Ensure image is responsive */
img {
    max-width: 50%;
    height: auto;
}

/* Reduced header size */
header {
    background-color: #4caf50;
    color: white;
    padding: 10px;
    font-size: 0.8em;
}

/* Reduced subtitle size */
.subtitle {
    font-size: 1em;
    font-weight: 300;
}

/* Footer is always at the bottom */
footer {
    background-color: #333;
    color: white;
    padding: 5px 0;
    font-size: 0.8em;
    width: 100%;
}