body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f7f9fc;
    color: #333;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
}

.container {
    max-width: 800px;
    margin: 20px;
    padding: 30px;
    background-color: #fff;
    border-radius: 10px;
    border: 1px solid #e0e0e0;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    text-align: center;
}

h1 {
    font-size: 2rem;
    color: #4a90e2;
    margin-bottom: 20px;
}

p {
    font-size: 1rem;
    margin-bottom: 20px;
}

.diagram {
    margin-top: 20px;
    text-align: center;
}

canvas {
    border: 2px solid #4a90e2;
    border-radius: 10px;
    background-color: #fafafa;
}

button {
    margin-top: 20px;
    padding: 10px 20px;
    font-size: 1rem;
    color: #fff;
    background-color: #4a90e2;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #357ABD;
}