body {    
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
}

header {
    text-align: center;
    padding: 20px;
    background-color: #333;
    color: white;
}

h2 {
    margin: 0;
}

main {
    display: flex;
    justify-content: center;
}

#container {
    width: 300px;
    display: flex;
    flex-wrap: wrap;
    margin: 20px;
}

.pixels {
    width: 15px;
    height: 15px;
    background-color: whitesmoke;
    border: 1px solid #ccc;
    border-radius: 3px;
}

footer {
    text-align: center;
    padding: 20px;
    background-color: #333;
    color: white;
    border-radius: 3px;
}

button {
    padding: 10px;
    margin: 5px;
    cursor: pointer;
    border: none;
    border-radius: 3px;
    font-size: 14px;
    border-radius: 3px;

}

button#black {
    background-color: #161616;
    color: white;
}

button#white {
    background-color: #fff;
    color: #333;
}

button#random {
    background-color: #3498db;
    color: white;
}

button#rainbow {
    background-color: #f39c12;
    color: white;
}