/* Grok mức 1 — khung chat nổi, không đụng layout sổ */
.ai-fab {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 80;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border: 0;
  border-radius: 999px;
  background: var(--navy, #123B68);
  color: #fff;
  font: 600 13px/1 var(--font, inherit);
  box-shadow: var(--shadow-lg, 0 14px 32px rgba(23, 43, 77, 0.18));
  cursor: pointer;
}
.ai-fab:hover { filter: brightness(1.08); }
.ai-fab .material-symbols-outlined { font-size: 20px; }

.ai-panel {
  position: fixed;
  right: 16px;
  bottom: 70px;
  z-index: 81;
  width: min(420px, calc(100vw - 24px));
  height: min(620px, calc(100vh - 96px));
  display: flex;
  flex-direction: column;
  background: var(--surface, #fff);
  border: 1px solid var(--line, #8fbdd9);
  border-radius: 16px;
  box-shadow: var(--shadow-lg, 0 14px 32px rgba(23, 43, 77, 0.16));
  overflow: hidden;
}
.ai-panel[hidden] { display: none !important; }

/* Form sửa vé / thu-chi nổi trên nút Trợ lý AI — tránh bấm Lưu trúng FAB */
body:has(.payment-edit-modal) .ai-fab,
body:has(.payment-edit-modal) .ai-panel,
body:has(.transaction-edit-modal) .ai-fab,
body:has(.transaction-edit-modal) .ai-panel,
body:has(.pay-img-lightbox) .ai-fab,
body:has(.pay-img-lightbox) .ai-panel {
  display: none !important;
}

.ai-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
  padding: 12px 14px 10px;
  border-bottom: 1px solid var(--line, #d5deeb);
  background: var(--bg-soft, #f0f8fd);
}
.ai-head b { display: block; font-size: 14px; color: var(--ink, #0f2744); }
.ai-head small { display: block; margin-top: 2px; color: var(--muted, #4a6d8c); font-size: 11.5px; }
.ai-head-actions {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-shrink: 0;
}
.ai-head button {
  border: 0;
  background: transparent;
  color: var(--muted, #4a6d8c);
  cursor: pointer;
  padding: 4px;
  border-radius: 8px;
}
.ai-head button:hover {
  background: rgba(18, 59, 104, 0.08);
  color: var(--ink, #0f2744);
}

.ai-msgs {
  flex: 1;
  overflow: auto;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: #f7fbfe;
}
.ai-msg {
  max-width: 92%;
  padding: 8px 10px;
  border-radius: 12px;
  font-size: 13px;
  line-height: 1.45;
  white-space: pre-wrap;
  word-break: break-word;
}
.ai-msg.user {
  align-self: flex-end;
  background: var(--primary, #1677FF);
  color: #fff;
}
.ai-msg.bot {
  align-self: flex-start;
  background: #fff;
  border: 1px solid var(--line, #d5deeb);
  color: var(--ink, #0f2744);
}
.ai-msg.bot b { font-weight: 650; }
.ai-msg.sys { align-self: stretch; background: var(--warning-soft, #fff6e5); color: #7a5200; font-size: 12.5px; }
.ai-msg.err { align-self: stretch; background: var(--danger-soft, #fdecee); color: #9b1c22; }

.ai-suggest {
  align-self: stretch;
  border: 1px dashed var(--primary, #1677FF);
  background: #fff;
  border-radius: 12px;
  padding: 10px;
}
.ai-suggest b { display: block; font-size: 13px; }
.ai-suggest small { display: block; margin: 4px 0 8px; color: var(--muted, #4a6d8c); }
.ai-suggest-actions { display: flex; flex-wrap: wrap; gap: 6px; }
.ai-suggest button {
  border: 0;
  background: var(--primary, #1677FF);
  color: #fff;
  border-radius: 8px;
  padding: 7px 10px;
  font-weight: 650;
  cursor: pointer;
  font-size: 12px;
}
.ai-suggest button.ghost {
  background: var(--surface-2, #e3f1fa);
  color: var(--ink, #0f2744);
}
.ai-suggest button.commit {
  background: var(--success, #16A36A);
}

.ai-files { padding: 0 12px; display: flex; flex-wrap: wrap; gap: 6px; }
.ai-chip {
  font-size: 11.5px;
  background: var(--primary-soft, #e8f1ff);
  color: var(--ink-2, #1e3a5f);
  border-radius: 10px;
  padding: 4px 8px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.ai-chip img {
  width: 36px;
  height: 36px;
  object-fit: cover;
  border-radius: 6px;
}
.ai-panel.is-drag {
  outline: 2px dashed var(--primary, #1677FF);
  outline-offset: -4px;
}

.ai-form {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 6px;
  padding: 10px;
  border-top: 1px solid var(--line, #d5deeb);
  background: #fff;
}
.ai-form textarea {
  resize: none;
  min-height: 40px;
  max-height: 88px;
  border: 1px solid var(--line, #8fbdd9);
  border-radius: 10px;
  padding: 8px 10px;
  font: inherit;
}
.ai-form button, .ai-form label.ai-up {
  border: 0;
  border-radius: 10px;
  background: var(--surface-2, #e3f1fa);
  color: var(--ink, #0f2744);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
}
.ai-form button.primary { background: var(--primary, #1677FF); color: #fff; }
.ai-form input[type="file"] { display: none; }
.ai-keybox { padding: 10px 12px 0; display: grid; gap: 6px; }
.ai-keybox input {
  border: 1px solid var(--line, #8fbdd9);
  border-radius: 8px;
  padding: 8px;
  font: inherit;
}

@media (max-width: 640px) {
  .ai-panel {
    right: 0;
    bottom: 0;
    width: 100vw;
    height: 100vh;
    border-radius: 0;
  }
  .ai-fab { right: 12px; bottom: 12px; }
}