body {
    font-family: Arial, sans-serif;
    background: #f4f4f4;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}

h1 {
    margin-top: 30px;
    color: #333;
}

#canvas-container {
    margin: 30px 0;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
}

button {
    padding: 10px 20px;
    font-size: 16px;
    border: none;
    border-radius: 5px;
    background: #4caf50;
    color: white;
    cursor: pointer;
    margin-bottom: 30px;
}

button:hover {
    background: #388e3c;
}