body { margin: 0; background: #1e1e1e; color: white; font-family: sans-serif; } .taskbar { position: fixed; bottom: 0; width: 100%; background: #000; display: flex; flex-wrap: wrap; justify-content: center; gap: 4px; padding: 5px; } .app-btn { background: white; color: black; padding: 5px 10px; border: none; cursor: pointer; } .window { position: absolute; top: 100px; left: 100px; background: #222; border: 2px solid #555; width: 300px; height: 200px; padding: 10px; display: none; }