/* ============================================================
   AI Assist — Drawer Chat Component
   ============================================================ */

/* --- AI Assist Button --- */

.ai-assist-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  font-size: 12px;
  font-weight: 500;
  font-family: var(--font);
  color: var(--primary);
  background: var(--primary-light);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
  white-space: nowrap;
}

.ai-assist-btn:hover {
  background: #E0E7FF;
  border-color: var(--primary);
}

.ai-assist-btn .ai-icon {
  font-size: 13px;
  line-height: 1;
}

/* --- Drawer Overlay --- */

.ai-drawer-overlay {
  position: fixed;
  inset: 0;
  z-index: 150;
  background: rgba(0, 0, 0, 0.3);
  opacity: 0;
  transition: opacity 200ms ease;
  pointer-events: none;
}

.ai-drawer-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

/* --- Drawer Panel --- */

.ai-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  z-index: 151;
  width: 420px;
  max-width: 100vw;
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  box-shadow: -4px 0 24px rgba(0, 0, 0, 0.12);
  transform: translateX(100%);
  transition: transform 250ms ease;
}

.ai-drawer-overlay.open .ai-drawer {
  transform: translateX(0);
}

/* --- Drawer Header --- */

.ai-drawer-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.ai-drawer-header h3 {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
}

.ai-drawer-subtitle {
  flex: 1;
  font-size: 12px;
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ai-drawer-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: none;
  background: none;
  font-size: 18px;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: 6px;
  flex-shrink: 0;
}

.ai-drawer-close:hover {
  background: var(--bg-page);
  color: var(--text-primary);
}

/* --- Drawer Body (Messages) --- */

.ai-drawer-body {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.ai-drawer-body .ai-empty {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
  padding: 40px 20px;
}

/* --- Messages --- */

.ai-msg {
  max-width: 90%;
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 13px;
  line-height: 1.5;
  word-wrap: break-word;
  white-space: pre-wrap;
}

.ai-msg.user {
  align-self: flex-end;
  background: var(--primary);
  color: #FFFFFF;
  border-bottom-right-radius: 4px;
}

.ai-msg.assistant {
  align-self: flex-start;
  background: var(--bg-page);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
}

.ai-msg.error {
  align-self: flex-start;
  background: var(--danger-light);
  color: var(--danger);
  border: 1px solid var(--danger);
  border-bottom-left-radius: 4px;
  font-size: 12px;
}

/* --- Typing Indicator --- */

.ai-typing {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 10px 14px;
  align-self: flex-start;
}

.ai-typing-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-muted);
  animation: aiTypingBounce 1.2s infinite;
}

.ai-typing-dot:nth-child(2) { animation-delay: 0.2s; }
.ai-typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes aiTypingBounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-4px); opacity: 1; }
}

/* --- Drawer Footer --- */

.ai-drawer-footer {
  border-top: 1px solid var(--border);
  padding: 12px 20px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* Composer */

.ai-composer {
  display: flex;
  gap: 8px;
  align-items: flex-end;
}

.ai-composer textarea {
  flex: 1;
  resize: none;
  padding: 8px 12px;
  font-size: 13px;
  font-family: var(--font);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  outline: none;
  min-height: 38px;
  max-height: 100px;
  transition: border-color var(--transition);
}

.ai-composer textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-ring);
}

.ai-send-btn {
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 600;
  font-family: var(--font);
  color: #FFFFFF;
  background: var(--primary);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--transition);
}

.ai-send-btn:hover {
  background: var(--primary-hover);
}

.ai-send-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Adopt Section */

.ai-adopt-section {
  display: flex;
  gap: 8px;
  align-items: flex-end;
}

.ai-adopt-section textarea {
  flex: 1;
  resize: none;
  padding: 8px 12px;
  font-size: 12px;
  font-family: var(--font);
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  outline: none;
  min-height: 36px;
  max-height: 80px;
  background: var(--bg-page);
  transition: border-color var(--transition);
}

.ai-adopt-section textarea:focus {
  border-color: var(--primary);
}

.ai-adopt-btn {
  padding: 8px 12px;
  font-size: 12px;
  font-weight: 600;
  font-family: var(--font);
  color: var(--primary);
  background: var(--primary-light);
  border: 1px solid var(--primary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--transition);
}

.ai-adopt-btn:hover {
  background: #E0E7FF;
}

.ai-adopt-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* --- Responsive --- */

@media (max-width: 768px) {
  .ai-drawer {
    width: 100vw;
  }
}