.assistant-launcher {
  position: fixed;
  inset-inline-end: max(18px, env(safe-area-inset-right));
  bottom: max(18px, env(safe-area-inset-bottom));
  z-index: 75;
  display: grid;
  place-items: center;
  width: 64px;
  height: 64px;
  padding: 8px;
  border: 2px solid rgb(255 255 255 / 78%);
  border-radius: 50%;
  background: linear-gradient(145deg, #0a478d, #042c71);
  box-shadow: 0 12px 28px rgb(4 44 113 / 30%);
  cursor: grab;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  transition: box-shadow .18s ease, transform .18s ease;
}

.assistant-launcher:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 32px rgb(4 44 113 / 38%);
}

.assistant-launcher:focus-visible {
  outline: 3px solid #f47a21;
  outline-offset: 3px;
}

.assistant-launcher.is-dragging {
  cursor: grabbing;
  transition: none;
}

.assistant-launcher img {
  display: block;
  width: 44px;
  height: 44px;
  object-fit: contain;
  pointer-events: none;
}

@media (max-width: 640px) {
  .assistant-launcher { width: 58px; height: 58px; padding: 7px; }
  .assistant-launcher img { width: 40px; height: 40px; }
}

@media (prefers-reduced-motion: reduce) {
  .assistant-launcher { transition: none; }
}