body {
    text-align: center;
    font-family: Arial, sans-serif;
    background-color: #f0f0f0;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 500px;
    margin: 50px auto;
    padding: 20px;
    background-color: #ffffff;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1 {
    color: #333;
}

form {
    margin: 20px 0;
}

label {
    display: block;
    margin-bottom: 10px;
    font-size: 18px;
}

input {
    padding: 10px;
    font-size: 16px;
    width: 80%;
    max-width: 300px;
}

button {
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
}

canvas {
    border: 2px solid #333;
    background-color: #fff;
    margin-top: 20px;
}

#restartButton {
    margin-top: 20px;
    padding: 10px 20px;
    font-size: 16px;
}