body {
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: #f0f0f0;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 20px;
}

h1 {
    margin-top: 20px;
}

#fileInput {
    margin: 20px 0;
}

canvas {
    border: 1px solid #000;
    margin-bottom: 20px;
    cursor: crosshair;
}

.controls {
    margin-bottom: 10px;
    display: flex;
    align-items: center;
}

.controls label {
    margin-right: 10px;
}

.controls input[type="range"], .controls input[type="color"] {
    margin-right: 10px;
}

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