body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #1a1a1a;
    color: #f1f1f1;
}

header {
    background-color: #0d0d0d;
    padding: 20px;
    text-align: center;
}

header h1 {
    margin: 0;
    color: #ffcc00;
}

nav {
    display: flex;
    justify-content: center;
    background-color: #222;
}

nav a {
    color: #f1f1f1;
    text-decoration: none;
    padding: 15px 20px;
}

nav a:hover {
    background-color: #444;
}

main {
    padding: 40px 20px;
    text-align: center;
}

button.copy-btn {
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    margin-top: 20px;
}

footer {
    text-align: center;
    padding: 20px;
    background-color: #0d0d0d;
    margin-top: 40px;
}