body {
    font-family: Arial, sans-serif;
    padding: 20px;
    background-color: #1c1c1e;
    color: #fff;
}

.container {
    max-width: 750px;
    margin: auto;
    text-align: center;
}

button, input[type="file"] {
    padding: 8px 15px;
    margin: 5px;
    cursor: pointer;
}

button.active {
    background-color: #28a745;
    color: #fff;
}

.tools {
    margin: 15px;
}

.video-container {
    position: relative;
    width: 720px;
    height: 405px;
    margin: 0 auto;
}

#canvasTracking {
    pointer-events: none;
}

#videoPlayer, #canvasTracking, #canvasGraphics {
    position: absolute;
    top: 0;
    left: 0;
}