#bg-fs-chat-root {
  position: fixed;
  inset: 0;
  background: #0f1115;
  color: #eaeaea;
  display: flex;
  flex-direction: column;
  font-family: Inter, system-ui, sans-serif;
  z-index: 999999;
}

.bg-fs-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 20px;
  border-bottom: 1px solid #222;
}

.bg-fs-title span {
  display: block;
  font-size: 12px;
  color: #aaa;
}

.bg-fs-modes button {
  background: #1a1d24;
  color: #ccc;
  border: 1px solid #333;
  padding: 6px 12px;
  margin-left: 6px;
  cursor: pointer;
  border-radius: 6px;
}

.bg-fs-modes button.active {
  background: #4f46e5;
  color: #fff;
  border-color: #4f46e5;
}

#bg-fs-messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
}

.bg-msg {
  max-width: 720px;
  margin-bottom: 20px;
  line-height: 1.6;
}

.bg-msg.user {
  margin-left: auto;
  background: #1f2937;
  padding: 14px 16px;
  border-radius: 12px;
}

.bg-msg.assistant {
  margin-right: auto;
}

.bg-msg.assistant .bubble {
  background: #111827;
  padding: 14px 16px;
  border-radius: 12px;
}

.bg-fs-input {
  display: flex;
  gap: 10px;
  padding: 16px;
  border-top: 1px solid #222;
}

#bg-fs-text {
  flex: 1;
  resize: none;
  height: 48px;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid #333;
  background: #0b0d11;
  color: #fff;
}

#bg-fs-send {
  background: #4f46e5;
  color: #fff;
  border: none;
  padding: 0 18px;
  border-radius: 8px;
  cursor: pointer;
}