body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    background-color: #e0f7fa;
    color: #333;
}

header {
    background-color: #00796b;
    color: white;
    padding: 1em 0;
    text-align: center;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

nav {
    display: flex;
    justify-content: center;
    background-color: #004d40;
    padding: 1em;
}

nav a {
    color: #e0f7fa;
    margin: 0 1em;
    text-decoration: none;
    font-weight: bold;
    cursor: pointer;
}

main {
    padding: 2em;
    text-align: center;
}

footer {
    background-color: #004d40;
    color: #e0f7fa;
    text-align: center;
    padding: 1em 0;
    position: fixed;
    width: 100%;
    bottom: 0;
}