body {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: #0f1115;
  color: #f5f5f5;
}
.container {
  max-width: 800px;
  margin: 40px auto;
  padding: 0 16px;
}
.controls {
  margin: 16px 0 24px;
}
button {
  padding: 10px 16px;
  margin-right: 8px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}
#startBtn { background: #2e7d32; color: #fff; }
#stopBtn { background: #b71c1c; color: #fff; }
.panel {
  background: #1b1f2a;
  padding: 12px;
  border-radius: 6px;
  min-height: 64px;
  white-space: pre-wrap;
}

.status {
  margin-left: 12px;
  font-weight: 600;
  color: #a0a0a0;
}
audio { width: 100%; margin-top: 10px; }