.assistant-button {
  position: fixed; right: 22px; bottom: 22px; z-index: 12;
  min-height: 54px; padding: 0 19px; border: 0; border-radius: 28px;
  background: var(--navy); color: #fff; box-shadow: 0 14px 36px #061a3950;
  display: flex; align-items: center; gap: 10px; font-weight: 850;
}
.assistant-button span { color: #f1c94c; font-size: 22px; }
.assistant-panel {
  position: fixed; right: 22px; bottom: 88px; z-index: 13;
  width: min(390px, calc(100vw - 24px)); max-height: min(680px, calc(100dvh - 110px));
  display: none; grid-template-rows: auto minmax(160px, 1fr) auto auto auto auto;
  border: 1px solid var(--line); border-radius: 18px; background: #fff;
  box-shadow: 0 22px 60px #061a3940; overflow: hidden;
}
.assistant-panel.open { display: grid; }
.assistant-panel header { padding: 16px 18px; background: var(--navy); color: #fff; display: flex; align-items: center; justify-content: space-between; }
.assistant-panel header div { display: grid; gap: 2px; }
.assistant-panel header small { color: #cdd8e6; }
.assistant-panel header button { border: 0; background: transparent; color: #fff; font-size: 28px; }
.assistant-messages { padding: 16px; overflow: auto; display: flex; flex-direction: column; gap: 10px; background: #f6f8fb; }
.assistant-message { max-width: 88%; margin: 0; padding: 10px 12px; border-radius: 13px; line-height: 1.45; font-size: 14px; white-space: pre-wrap; }
.assistant-message.bot { align-self: flex-start; background: #fff; border: 1px solid var(--line); }
.assistant-message.user { align-self: flex-end; background: #163e70; color: #fff; }
.assistant-message.status { align-self: flex-start; color: var(--muted); background: transparent; font-style: italic; }
.assistant-quick { padding: 10px 14px; display: flex; gap: 6px; overflow: auto; border-top: 1px solid var(--line); }
.assistant-quick button { white-space: nowrap; border: 1px solid #b9c7d8; border-radius: 18px; background: #fff; color: var(--blue); padding: 7px 10px; font-size: 12px; }
.assistant-whatsapp { margin: 0 14px 10px; padding: 11px; text-align: center; border-radius: 8px; background: #147a42; color: #fff; text-decoration: none; font-weight: 800; }
.assistant-panel form { padding: 12px 14px; display: grid; grid-template-columns: 1fr auto; gap: 7px; border-top: 1px solid var(--line); }
.assistant-panel form label { position: absolute; left: -9999px; }
.assistant-panel form input { min-width: 0; padding: 11px; border: 1px solid #b9c7d8; border-radius: 8px; }
.assistant-panel form button { border: 0; border-radius: 8px; background: var(--navy); color: #fff; font-weight: 800; padding: 0 14px; }
.assistant-privacy { margin: 0; padding: 0 14px 12px; color: var(--muted); font-size: 10px; }
@media (max-width: 520px) {
  .assistant-button { right: 12px; bottom: 12px; }
  .assistant-button b { display: none; }
  .assistant-panel { right: 12px; bottom: 76px; max-height: calc(100dvh - 90px); }
}