/* Basic Reset */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: #f4f4f4;
    transition: background-color 0.3s;
}

header {
    background-color: #333;
    color: white;
    padding: 2rem;
    text-align: center;
    width: 100%;
}

main {
    padding: 20px;
    max-width: 600px;
}

/* Dark Mode Class */
.dark-mode {
    background-color: #222;
    color: white;
}