body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: black;
    color: white;
}

header {
    text-align: center;
    padding: 10px;
}

.nav {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 10px;
}

.nav button {
    padding: 10px 20px;
    background-color: #222;
    color: white;
    border: none;
    cursor: pointer;
    font-size: 16px;
    border-radius: 4px;
}

.nav button:hover {
    background-color: #555;
}

.grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    padding: 20px;
}

.grid-item {
    background-color: #111;
    color: white;
    text-align: center;
    padding: 40px 0;
    text-decoration: none;
    border-radius: 4px;
}

.grid-item:hover {
    background-color: #333;
}

footer {
    position: fixed;
    bottom: 0;
    width: 100%;
    background-color: black;
    color: white;
    text-align: center;
    padding: 10px 0;
    border-top: 1px solid white;
}