html, body {
    background-color: inherit;
    color: #333;
    display: flex;
    flex-direction: column;
    font-family: Arial, sans-serif;
    height: 100%;
    margin: 0;
    padding: 0;
    transition: background-color 0.4s ease, color 0.4s ease;
}

header {
    align-items: center;
    background-color: #4a90e2;
    display: flex;
    padding: 10px 20px;
}

nav a {
    color: white;
    font-weight: bold;
    margin-right: 15px;
    text-decoration: none;
}

nav a:hover {
    text-decoration: underline;
}

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

footer {
    background-color: #e2e2e2;
    padding: 10px;
    text-align: center;
    transition: background-color 0.4s ease, color 0.4s ease;
}