/* ============================================
   AI ASSISTANT — Trợ lý AI Gạo Nâu (Control AI)
   Dark Luxury + Liquid Glass theme.
   Floating FAB + chat panel + result cards.
   DOM ids owned by js/ai-assistant.js:
     #gnAiFab, #gnAiPanel, #gnAiMessages,
     #gnAiInput, #gnAiSend, #gnAiClose
   Reuses :root tokens from core.css — no new
   hardcoded colors when a variable already exists.
   ============================================ */

/* --- Local keyframes (uniquely namespaced to avoid collisions) --- */
@keyframes gnAiFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes gnAiSlideUp {
  from { opacity: 0; transform: translateY(16px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes gnAiSpin {
  to { transform: rotate(360deg); }
}

@keyframes gnAiDots {
  0%, 80%, 100% { opacity: 0.3; transform: translateY(0); }
  40% { opacity: 1; transform: translateY(-3px); }
}

/* ============================================ FLOATING BUTTON ============================================ */
#gnAiFab {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 100000; /* above app toasts (2000) and sticky bars (9999) */
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 1px solid var(--primary-alpha-30);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  line-height: 1;
  color: var(--bg-dark);
  background: linear-gradient(145deg, var(--primary-lighter), var(--primary));
  box-shadow: var(--glass-shadow), var(--primary-glow);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
}

#gnAiFab:hover {
  transform: translateY(-2px) scale(1.04);
  filter: brightness(1.05);
  box-shadow: 0 10px 34px rgba(0, 0, 0, 0.35), var(--primary-glow);
}

#gnAiFab:active {
  transform: translateY(0) scale(0.97);
}

#gnAiFab:focus-visible {
  outline: none;
  box-shadow: var(--glass-shadow), var(--focus-ring, 0 0 0 3px var(--primary-alpha-30));
}

/* When the panel is open, the FAB hides on small screens to free space */
#gnAiFab[aria-expanded="true"] .gn-ai-fab-icon-open { display: none; }

/* ============================================ CHAT PANEL ============================================ */
#gnAiPanel {
  position: fixed;
  right: 20px;
  bottom: 88px; /* clears the 56px FAB + 20px margin + gap */
  z-index: 100001;
  width: 380px;
  max-width: calc(100vw - 32px);
  height: calc(100vh - 120px);
  max-height: 720px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-radius: var(--glass-radius);
  border: 1px solid var(--glass-border);
  background: var(--glass-bg, var(--bg-card));
  backdrop-filter: blur(12px) saturate(1.1);
  -webkit-backdrop-filter: blur(12px) saturate(1.1);
  box-shadow: var(--glass-shadow, 0 20px 60px rgba(0, 0, 0, 0.4));
  animation: gnAiSlideUp 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

#gnAiPanel[hidden] { display: none; }
/* Panel ĐÓNG mặc định — chỉ hiện khi JS thêm class .gn-ai-open (mở qua nút 🤖, đóng qua ✕/Esc).
   Trước đây thiếu rule này nên panel kẹt mở vĩnh viễn, che + chặn click góc dưới-phải mọi trang. */
#gnAiPanel:not(.gn-ai-open) { display: none; }

/* --- Panel header --- */
.gn-ai-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  flex-shrink: 0;
  border-bottom: 1px solid var(--white-08);
  background: var(--white-05);
}

.gn-ai-head-logo {
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--bg-dark);
  background: linear-gradient(145deg, var(--primary-lighter), var(--primary));
}

.gn-ai-head-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
  flex: 1;
}

.gn-ai-head-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-light);
  line-height: 1.25;
}

.gn-ai-head-sub {
  font-size: 0.7rem;
  color: var(--text-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

#gnAiClose {
  flex-shrink: 0;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  background: var(--white-08);
  border: 1px solid var(--white-08);
  color: var(--text-muted);
  transition: var(--transition-fast);
}

#gnAiClose:hover {
  background: var(--white-12);
  color: var(--text-light);
}

#gnAiClose:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring, 0 0 0 3px var(--primary-alpha-30));
}

#gnAiClose .material-symbols-outlined { font-size: 18px; }

/* ============================================ MESSAGES (scroll area) ============================================ */
#gnAiMessages {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  scroll-behavior: smooth;
}

#gnAiMessages::-webkit-scrollbar { width: 7px; }

#gnAiMessages::-webkit-scrollbar-track { background: transparent; }

#gnAiMessages::-webkit-scrollbar-thumb {
  background: var(--white-10);
  border-radius: 99px;
}

#gnAiMessages::-webkit-scrollbar-thumb:hover { background: var(--white-15); }

/* --- Chat bubbles --- */
.gn-ai-msg {
  display: flex;
  max-width: 100%;
  animation: gnAiFadeIn 0.25s ease;
}

.gn-ai-msg-user { justify-content: flex-end; }

.gn-ai-msg-assistant { justify-content: flex-start; }

.gn-ai-bubble {
  max-width: 86%;
  padding: 10px 13px;
  border-radius: 16px;
  font-size: 0.85rem;
  line-height: 1.55;
  color: var(--text-light);
  word-break: break-word;
  white-space: pre-wrap;
}

/* User bubble: filled gold, anchored right */
.gn-ai-msg-user .gn-ai-bubble {
  background: linear-gradient(145deg, var(--primary), var(--primary-hover));
  color: var(--bg-dark);
  font-weight: 600;
  border-bottom-right-radius: 5px;
}

/* Assistant bubble: glassy surface, anchored left */
.gn-ai-msg-assistant .gn-ai-bubble {
  background: var(--bg-surface);
  border: 1px solid var(--white-08);
  border-bottom-left-radius: 5px;
}

/* ============================================ RESULT CARDS ============================================ */
.gn-ai-results {
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 100%;
  margin-top: 2px;
}

.gn-ai-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 12px 13px;
  border-radius: 14px;
  border: 1px solid var(--white-08);
  background: var(--surface-card, var(--bg-card));
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.gn-ai-card:hover {
  border-color: var(--primary-alpha-30);
  background: var(--bg-surface);
}

.gn-ai-card-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
}

.gn-ai-card-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-light);
  line-height: 1.3;
  word-break: break-word;
}

/* Type chip (talent / booking / competitor / contract) */
.gn-ai-card-type {
  flex-shrink: 0;
  font-size: 0.6rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 3px 8px;
  border-radius: 99px;
  color: var(--primary-lighter);
  background: var(--primary-alpha-15);
  border: 1px solid var(--primary-alpha-20);
}

.gn-ai-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 6px;
  font-size: 0.7rem;
  color: var(--text-muted);
}

.gn-ai-card-meta span {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 2px 7px;
  border-radius: 6px;
  background: var(--white-05);
}

.gn-ai-card-reason {
  font-size: 0.75rem;
  line-height: 1.5;
  color: var(--text-muted);
}

.gn-ai-card-reason b { color: var(--primary-lighter); font-weight: 700; }

.gn-ai-card-foot {
  display: flex;
  justify-content: flex-end;
}

/* "Xem" button on each card */
.gn-ai-card-view {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 14px;
  border-radius: 9px;
  border: 1px solid var(--primary-alpha-30);
  cursor: pointer;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--primary-lighter);
  background: var(--primary-alpha-08);
  transition: var(--transition-fast);
}

.gn-ai-card-view:hover {
  background: var(--primary);
  color: var(--bg-dark);
  border-color: var(--primary);
}

.gn-ai-card-view:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring, 0 0 0 3px var(--primary-alpha-30));
}

.gn-ai-card-view .material-symbols-outlined { font-size: 15px; }

/* ============================================ LOADING STATE (đang nghĩ...) ============================================ */
.gn-ai-loading {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 10px 13px;
  border-radius: 16px;
  border-bottom-left-radius: 5px;
  background: var(--bg-surface);
  border: 1px solid var(--white-08);
  font-size: 0.82rem;
  color: var(--text-muted);
}

.gn-ai-loading-dots {
  display: inline-flex;
  gap: 4px;
}

.gn-ai-loading-dots i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
  animation: gnAiDots 1.2s infinite ease-in-out;
}

.gn-ai-loading-dots i:nth-child(2) { animation-delay: 0.18s; }

.gn-ai-loading-dots i:nth-child(3) { animation-delay: 0.36s; }

/* Spinner variant (e.g. send button busy) */
.gn-ai-spinner {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid var(--white-12);
  border-top-color: var(--bg-dark);
  animation: gnAiSpin 0.7s linear infinite;
}

/* ============================================ EMPTY STATE ============================================ */
.gn-ai-empty {
  margin: auto;
  text-align: center;
  padding: 24px 18px;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.gn-ai-empty-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  color: var(--primary);
  background: var(--primary-alpha-08);
  border: 1px solid var(--primary-alpha-20);
}

.gn-ai-empty-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-light);
}

.gn-ai-empty p {
  font-size: 0.78rem;
  line-height: 1.55;
  max-width: 280px;
}

/* Suggestion chips inside the empty state */
.gn-ai-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  justify-content: center;
  margin-top: 4px;
}

.gn-ai-suggestion {
  cursor: pointer;
  font-size: 0.72rem;
  padding: 6px 12px;
  border-radius: 99px;
  color: var(--text-light);
  background: var(--white-05);
  border: 1px solid var(--white-10);
  transition: var(--transition-fast);
}

.gn-ai-suggestion:hover {
  border-color: var(--primary-alpha-30);
  color: var(--primary-lighter);
  background: var(--primary-alpha-08);
}

.gn-ai-suggestion:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring, 0 0 0 3px var(--primary-alpha-30));
}

/* "Trợ lý tạm nghỉ" notice */
.gn-ai-offline {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 9px 12px;
  border-radius: 12px;
  font-size: 0.74rem;
  line-height: 1.5;
  color: var(--text-muted);
  background: var(--white-05);
  border: 1px solid var(--white-10);
}

.gn-ai-offline .material-symbols-outlined {
  font-size: 16px;
  color: var(--primary);
  flex-shrink: 0;
}

/* ============================================ INPUT BAR (đáy) ============================================ */
.gn-ai-input-bar {
  flex-shrink: 0;
  display: flex;
  align-items: flex-end;
  gap: 8px;
  padding: 12px;
  border-top: 1px solid var(--white-08);
  background: var(--white-05);
}

#gnAiInput {
  flex: 1;
  min-width: 0;
  resize: none;
  max-height: 110px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--white-10);
  background: var(--bg-dark);
  color: var(--text-light);
  font-family: var(--font-body);
  font-size: 0.85rem;
  line-height: 1.45;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

#gnAiInput::placeholder { color: var(--text-dim); }

#gnAiInput:focus {
  outline: none;
  border-color: var(--primary-alpha-30);
  box-shadow: var(--focus-ring, 0 0 0 3px var(--primary-alpha-30));
}

#gnAiInput:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

#gnAiInput::-webkit-scrollbar { width: 6px; }

#gnAiInput::-webkit-scrollbar-thumb {
  background: var(--white-10);
  border-radius: 99px;
}

#gnAiSend {
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--bg-dark);
  background: linear-gradient(145deg, var(--primary-lighter), var(--primary));
  transition: var(--transition-fast);
}

#gnAiSend:hover:not(:disabled) { filter: brightness(1.06); }

#gnAiSend:active:not(:disabled) { transform: scale(0.95); }

#gnAiSend:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

#gnAiSend:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring, 0 0 0 3px var(--primary-alpha-30));
}

#gnAiSend .material-symbols-outlined { font-size: 20px; }

/* ============================================ RESPONSIVE — mobile full-width đáy (≤480px) ============================================ */
@media (max-width: 480px) {
  #gnAiPanel {
    right: 0;
    left: 0;
    bottom: 0;
    width: 100%;
    max-width: 100%;
    height: 82vh;
    max-height: none;
    border-radius: var(--glass-radius) var(--glass-radius) 0 0;
    border-left: none;
    border-right: none;
    border-bottom: none;
  }

  /* Hide the FAB while the panel is open so it doesn't overlap the input */
  #gnAiFab[aria-expanded="true"] {
    opacity: 0;
    pointer-events: none;
  }

  .gn-ai-bubble { max-width: 90%; }
}

/* ============================================ ACCESSIBILITY ============================================ */
@media (prefers-reduced-motion: reduce) {
  #gnAiPanel,
  .gn-ai-msg,
  #gnAiFab { animation: none; }

  .gn-ai-loading-dots i,
  .gn-ai-spinner { animation: none; }

  #gnAiMessages { scroll-behavior: auto; }
}