body {
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #111;
    font-family: Arial, sans-serif;
    color: #fff;
}

#ui {
    position: absolute;
    top: 20px;
    left: 20px;
    z-index: 10;
    background: rgba(0, 0, 0, 0.6);
    padding: 10px 15px;
    border-radius: 8px;
}

#imageInput {
    margin-top: 10px;
}

canvas {
    display: block;
}

#ui div {
    margin-top: 10px;
}

#ui button {
    margin-right: 5px;
    margin-top: 5px;
}

:root {
    --accent: #00bcd4;
    --bg-dark: #1e1e1e;
    --bg-light: #2c2c2c;
    --text: #ffffff;
}
  
#ui {
    position: absolute;
    top: 20px;
    left: 20px;
    z-index: 10;
    background: var(--bg-light);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.4);
    color: var(--text);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    width: 280px;
}

#ui h1 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--accent);
}

#ui input[type="file"] {
    margin-bottom: 15px;
    width: 100%;
}

#ui div {
    margin-top: 10px;
}

label {
    font-size: 14px;
    display: block;
    margin-bottom: 4px;
}

input[type="range"] {
    width: 100%;
    appearance: none;
    background: var(--bg-dark);
    height: 6px;
    border-radius: 5px;
    outline: none;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    height: 14px;
    width: 14px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    margin-top: -4px;
    border: none;
    box-shadow: 0 0 2px #000;
}

input[type="checkbox"] {
    accent-color: var(--accent);
    transform: scale(1.2);
}

button {
    background: var(--accent);
    color: #fff;
    border: none;
    padding: 8px 14px;
    font-size: 14px;
    border-radius: 6px;
    cursor: pointer;
    margin: 4px 0;
    width: 100%;
    transition: background 0.2s ease;
}

button:hover {
    background: #0097a7;
}