body {
    font-family: Arial, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    background-color: #f0f0f0;
}

#uploadForm, #controls {
    margin: 20px;
    text-align: center;
}

#imageInput, #pixelInput, button {
    margin: 10px;
    padding: 5px 10px;
}

button {
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

button:hover {
    background-color: #45a049;
}

#imageContainer {
    max-width: 100%;
    max-height: 70vh;
    overflow: auto;
    border: 1px solid #ddd;
    margin-top: 20px;
}

#canvas {
    display: block;
}

.hidden {
    display: none;
}