body { font-family: Arial, sans-serif; margin: 0; padding: 0; background: #f4f4f4; }
.container { max-width: 800px; margin: auto; padding: 20px; background: white; }
h1 { text-align: center; }
#log { border: 1px solid #ccc; height: 200px; overflow-y: scroll; padding: 5px; background: #fafafa; }
.controls, .messaging, .fileTransfer { margin-top: 20px; }
button { margin: 5px; }