html, body {
  height: 100%;
  width: 100%;
  margin: 0;
  padding: 0;
}
body {
    font-family: Arial, sans-serif;
    text-align: center;
    background-color: #f4f4f4;
    margin: 40px 0;
}

h2 { color: #333; }

.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

input {
    padding: 10px;
    width: 250px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 16px;
}

button {
    padding: 10px 15px;
    background-color: #007BFF;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    transition: 0.3s;
}
button:hover { background-color: #0056b3; }

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