/* ===== AI Assistant Panel ===== */

pb-ai-assistant {
  display: flex;
  overflow: hidden;
}

.ai-sidebar {
  width: 360px;
  min-width: 360px;
  max-width: 480px;
  border-left: 1px solid var(--color-border);
  background: var(--color-bg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
  transition: width 0.2s ease;
}

.ai-sidebar.ai-collapsed {
  width: 0;
  min-width: 0;
  overflow: hidden;
  border-left: none;
}

.ai-resize-handle {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  cursor: col-resize;
  background: transparent;
  z-index: 10;
}

.ai-resize-handle:hover,
.ai-resize-handle:active {
  background: var(--color-primary);
}

/* ===== Header ===== */

.ai-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
  gap: 8px;
}

.ai-header-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.ai-header-title svg {
  width: 18px;
  height: 18px;
  color: var(--color-primary);
}

.ai-header-actions {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ===== Quick Actions ===== */

.ai-quick-actions {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.ai-quick-actions-label {
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.ai-quick-actions-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
}

.ai-quick-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 8px;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ai-quick-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-light);
}

/* ===== Action Picker ===== */

.ai-action-picker {
  padding: 8px 16px;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.ai-action-btn {
  padding: 5px 10px;
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  cursor: pointer;
  transition: all var(--transition);
}

.ai-action-btn:hover,
.ai-action-btn.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

/* ===== Chat Messages ===== */

.ai-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  scroll-behavior: smooth;
}

.ai-msg-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--color-text-light);
  text-align: center;
  gap: 8px;
  padding: 20px;
}

.ai-msg-empty svg {
  width: 40px;
  height: 40px;
  opacity: 0.3;
}

.ai-msg-empty p {
  font-size: 0.8125rem;
  line-height: 1.5;
}

.ai-msg {
  display: flex;
  flex-direction: column;
  gap: 6px;
  animation: aiMsgIn 0.25s ease;
}

@keyframes aiMsgIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.ai-msg-user {
  align-items: flex-end;
}

.ai-msg-assistant {
  align-items: flex-start;
}

.ai-msg-bubble {
  max-width: 85%;
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 0.8125rem;
  line-height: 1.6;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.ai-msg-user .ai-msg-bubble {
  background: var(--color-primary);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.ai-msg-assistant .ai-msg-bubble {
  background: var(--color-bg-alt);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-bottom-left-radius: 4px;
}

/* Markdown in AI messages */
.ai-msg-bubble p {
  margin-bottom: 8px;
}

.ai-msg-bubble p:last-child {
  margin-bottom: 0;
}

.ai-msg-bubble strong {
  font-weight: 700;
}

.ai-msg-bubble em {
  font-style: italic;
}

.ai-msg-bubble code {
  font-family: var(--font-mono);
  background: rgba(0,0,0,0.06);
  padding: 1px 5px;
  border-radius: 3px;
  font-size: 0.85em;
}

.ai-msg-assistant .ai-msg-bubble code {
  background: rgba(0,0,0,0.06);
}

.ai-msg-bubble pre {
  margin: 8px 0;
  background: #1e293b;
  color: #e2e8f0;
  padding: 12px 14px;
  border-radius: 8px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.5;
}

.ai-msg-bubble pre code {
  background: none;
  padding: 0;
  border-radius: 0;
  font-size: inherit;
  color: inherit;
}

.ai-msg-bubble ul,
.ai-msg-bubble ol {
  margin: 8px 0;
  padding-left: 20px;
}

.ai-msg-bubble li {
  margin-bottom: 4px;
}

.ai-msg-bubble h1,
.ai-msg-bubble h2,
.ai-msg-bubble h3 {
  margin: 12px 0 6px;
  line-height: 1.3;
}

.ai-msg-bubble h1 { font-size: 1.1rem; font-weight: 700; }
.ai-msg-bubble h2 { font-size: 1rem; font-weight: 700; }
.ai-msg-bubble h3 { font-size: 0.9rem; font-weight: 600; }

/* ===== AI Message Actions ===== */

.ai-msg-actions {
  display: flex;
  gap: 4px;
  padding: 2px 0 0 4px;
}

.ai-msg-actions .btn-icon {
  width: 26px;
  height: 26px;
  font-size: 0.625rem;
  border-radius: 4px;
  color: var(--color-text-light);
}

.ai-msg-actions .btn-icon:hover {
  background: var(--color-bg-alt);
  border-color: var(--color-border);
  color: var(--color-text);
}

/* ===== Typing Indicator ===== */

.ai-typing {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 12px 14px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  border-bottom-left-radius: 4px;
  max-width: 85%;
}

.ai-typing-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-text-light);
  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); }
  30% { transform: translateY(-6px); }
}

/* ===== Error Message ===== */

.ai-msg-error .ai-msg-bubble {
  background: #fef2f2;
  color: var(--color-danger);
  border-color: var(--color-danger);
}

.ai-msg-error .ai-retry-btn {
  margin-top: 4px;
  padding: 4px 12px;
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--color-danger);
  background: none;
  border: 1px solid var(--color-danger);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
}

.ai-msg-error .ai-retry-btn:hover {
  background: var(--color-danger);
  color: #fff;
}

/* ===== Input Area ===== */

.ai-input-area {
  padding: 12px 16px;
  border-top: 1px solid var(--color-border);
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

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

.ai-input {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.8125rem;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  outline: none;
  resize: none;
  line-height: 1.5;
  min-height: 40px;
  max-height: 120px;
  transition: border-color var(--transition);
}

.ai-input:focus {
  border-color: var(--color-primary);
}

.ai-send-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition);
  flex-shrink: 0;
}

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

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

.ai-send-btn svg {
  width: 18px;
  height: 18px;
}

/* ===== Context Info ===== */

.ai-context-info {
  padding: 6px 16px;
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  font-size: 0.6875rem;
  color: var(--color-text-light);
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.ai-context-info svg {
  width: 12px;
  height: 12px;
  flex-shrink: 0;
}

.ai-context-info span {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ===== Language Picker ===== */

.ai-lang-picker {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  padding: 8px 16px;
  border-top: 1px solid var(--color-border);
}

.ai-lang-btn {
  padding: 4px 10px;
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  cursor: pointer;
  transition: all var(--transition);
}

.ai-lang-btn:hover,
.ai-lang-btn.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

/* ===== Toast within AI panel ===== */

.ai-toast {
  position: absolute;
  bottom: 70px;
  left: 50%;
  transform: translateX(-50%);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark);
  font-size: 0.75rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  z-index: 5;
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
}

.ai-toast.show {
  opacity: 1;
}

/* ===== Responsive ===== */

@media (max-width: 1200px) {
  .ai-sidebar {
    width: 300px;
    min-width: 300px;
  }
}

@media (max-width: 1024px) {
  .ai-sidebar {
    position: fixed;
    top: var(--header-height);
    right: 0;
    bottom: 0;
    width: 380px;
    min-width: 380px;
    z-index: 100;
    box-shadow: var(--shadow-2xl);
  }

  .ai-sidebar.ai-collapsed {
    transform: translateX(100%);
  }
}

@media (max-width: 640px) {
  .ai-sidebar {
    width: 100vw;
    min-width: 100vw;
  }
}