/* ── Chat View ─────────────────────────────────────────────────────────────── */

.chat-view {
  display: flex;
  height: 100%;
  overflow: hidden;
}

/* Sidebar */
.chat-sidebar {
  width: 280px;
  min-width: 280px;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  background: var(--bg-secondary);
}

.chat-sidebar--hidden {
  display: none;
}

.chat-sidebar-header {
  padding: 12px;
  display: flex;
  gap: 8px;
  align-items: center;
}

.chat-sidebar-search-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.chat-sidebar-search-icon {
  position: absolute;
  left: 12px;
  color: var(--text-tertiary);
  pointer-events: none;
}

.chat-sidebar-search {
  width: 100%;
  padding: 8px 12px 8px 32px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 13px;
}

.chat-session-list {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 4px 8px;
}

.chat-session-item {
  padding: 10px 12px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 2px;
  transition: background 0.15s;
  position: relative;
}

.chat-session-item:hover {
  background: var(--hover);
}

.chat-session-item--active {
  background: var(--accent-bg, var(--hover));
}

.chat-session-title {
  font-weight: 500;
  font-size: 14px;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chat-session-preview {
  font-size: 12px;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chat-session-meta {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-tertiary);
}

/* === Chat Session Delete Button === */
.chat-session-delete-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  padding: 0;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  opacity: 0;
  transition: opacity var(--transition-fast), color var(--transition-fast);
}

.chat-session-item:hover .chat-session-delete-btn {
  opacity: 1;
}

.chat-session-delete-btn:hover {
  color: var(--color-error);
  opacity: 1;
}

.chat-session-delete-btn:focus {
  opacity: 1;
  outline: 2px solid var(--focus-ring-strong);
  outline-offset: 1px;
}

/* Context menu for session items */
.chat-session-context-menu {
  position: fixed;
  background: var(--bg-elevated, var(--bg));
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 4px 12px var(--shadow);
  padding: 4px;
  z-index: 100;
}

.chat-session-context-menu button {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 8px 12px;
  border: none;
  background: none;
  color: var(--text);
  cursor: pointer;
  border-radius: 4px;
  font-size: 13px;
}

.chat-session-context-menu button:hover {
  background: var(--hover);
}

/* Main chat thread */
.chat-thread {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
}

.chat-thread-header {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 8px;
}

.chat-thread-header-title {
  font-weight: 600;
  font-size: 15px;
}

/* Messages */
.chat-messages {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.chat-message {
  max-width: 75%;
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 14px;
  line-height: 1.5;
  word-break: break-word;
}

.chat-message--user {
  align-self: flex-end;
  background: var(--accent);
  color: var(--accent-text, #fff);
  border-bottom-right-radius: 4px;
}

.chat-message--assistant {
  align-self: flex-start;
  background: var(--bg-elevated, var(--bg-secondary));
  color: var(--text);
  border-bottom-left-radius: 4px;
}

.chat-message-avatar {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 4px;
  font-size: 12px;
  color: var(--text-secondary);
}

.chat-message-render-toggle {
  display: inline-flex;
  margin-left: auto;
  width: calc(var(--space-md) * 3);
  height: calc(var(--space-md) * 3);
  min-width: calc(var(--space-md) * 3);
  min-height: calc(var(--space-md) * 3);
  padding: 0;
  color: var(--text-muted);
  background: transparent;
  border-color: transparent;
}

.chat-message--assistant .chat-message-render-toggle {
  opacity: 0.6;
  transition: opacity var(--transition-fast);
}

.chat-message--assistant:hover .chat-message-render-toggle,
.chat-message-render-toggle:focus-visible,
.chat-message-render-toggle.chat-message-render-toggle--plain {
  opacity: 1;
}

.chat-message-render-toggle:hover {
  color: var(--text);
  background: color-mix(in srgb, var(--surface) 55%, transparent);
}

.chat-message-render-toggle:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring-strong);
}

.chat-message-render-toggle--plain {
  color: var(--text);
}

.chat-model-tag {
  font-size: 11px;
  padding: 1px 6px;
  border-radius: 4px;
  background: var(--surface-bg, rgba(255, 255, 255, 0.08));
  color: var(--text-secondary);
  margin-left: 6px;
  white-space: nowrap;
  vertical-align: middle;
}

.chat-message-content {
  white-space: pre-wrap;
}

.chat-message-content--plain {
  white-space: pre-wrap;
}

.chat-message-content--markdown {
  white-space: normal;
  overflow-wrap: anywhere;
}

.chat-message-content--markdown > :first-child {
  margin-top: 0;
}

.chat-message-content--markdown > :last-child {
  margin-bottom: 0;
}

.chat-message-content--markdown p,
.chat-message-content--markdown ul,
.chat-message-content--markdown ol,
.chat-message-content--markdown blockquote,
.chat-message-content--markdown pre,
.chat-message-content--markdown table {
  margin: 0 0 var(--space-sm);
}

.chat-message-content--markdown ul,
.chat-message-content--markdown ol {
  padding-left: var(--space-lg);
}

.chat-message-content--markdown code {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

.chat-message-content--markdown :not(pre) > code {
  padding: 0 var(--space-xs);
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--surface) 55%, transparent);
}

.chat-markdown-pre {
  margin: 0 0 var(--space-sm);
  padding: var(--space-sm);
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--surface) 65%, transparent);
  overflow-x: auto;
  white-space: pre;
  max-width: 100%;
}

.chat-markdown-table {
  display: block;
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
}

.chat-markdown-table th,
.chat-markdown-table td {
  border: 1px solid color-mix(in srgb, var(--border) 85%, transparent);
  padding: var(--space-xs) var(--space-sm);
}

.chat-message-time {
  font-size: 11px;
  color: var(--text-tertiary);
  margin-top: 4px;
}

.chat-message-thinking {
  margin-top: 6px;
}

.chat-message-thinking summary {
  font-size: 12px;
  color: var(--text-secondary);
  cursor: pointer;
}

.chat-message-thinking-content {
  font-size: 13px;
  color: var(--text-secondary);
  padding: 8px;
  background: var(--bg);
  border-radius: 6px;
  margin-top: 4px;
  white-space: pre-wrap;
  font-family: var(--font-mono, monospace);
  overflow-x: auto;
}

/* === Chat Tool Calls === */
.chat-tool-calls {
  margin-top: var(--space-sm);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.chat-tool-calls-header {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--text-muted);
  font-size: var(--space-md);
}

.chat-tool-call {
  border: var(--btn-border-width, 1px) solid color-mix(in srgb, var(--border) 85%, transparent);
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--surface) 35%, transparent);
}

.chat-tool-call summary {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  list-style: none;
  cursor: pointer;
  padding: var(--space-xs) var(--space-sm);
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  font-size: var(--space-md);
  min-width: 0;
}

.chat-tool-call summary::marker {
  content: "";
}

.chat-tool-call summary::-webkit-details-marker {
  display: none;
}

.chat-tool-call summary:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring-strong);
}

.chat-tool-call-status-dot {
  width: calc((var(--space-xs) + var(--space-sm)) / 2);
  height: calc((var(--space-xs) + var(--space-sm)) / 2);
  border-radius: 50%;
  background: var(--color-success);
  flex-shrink: 0;
}

.chat-tool-call-name {
  font-family: var(--font-mono, monospace);
  flex-shrink: 0;
}

.chat-tool-call-preview {
  color: var(--text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  min-width: 0;
  font-size: 0.6875rem;
}

.chat-tool-call-status-text {
  margin-left: auto;
  font-size: 0.6875rem;
  text-transform: lowercase;
}

.chat-tool-call-content {
  margin: var(--space-xs) var(--space-sm) var(--space-sm);
  padding: var(--space-sm);
  border-radius: var(--radius-sm);
  background: var(--bg);
  font-family: var(--font-mono, monospace);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.chat-tool-call-row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-xs);
  align-items: start;
}

.chat-tool-call-label {
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: 0.6875rem;
}

.chat-tool-call-value {
  color: var(--text);
  word-break: break-word;
  white-space: pre-wrap;
}

.chat-tool-call--running .chat-tool-call-status-dot {
  background: var(--color-info);
  animation: tool-call-pulse var(--transition-slow) infinite;
}

.chat-tool-call--error summary {
  color: var(--color-error);
}

.chat-tool-call--error .chat-tool-call-status-dot {
  background: var(--color-error);
}

.chat-tool-call-row--error {
  background: color-mix(in srgb, var(--color-error) 10%, transparent);
  border-radius: var(--radius-sm);
  padding: var(--space-xs);
}

.chat-tool-calls--compact .chat-tool-calls-header,
.chat-tool-calls--compact .chat-tool-call summary,
.chat-tool-calls--compact .chat-tool-call-content,
.chat-tool-calls--compact .chat-tool-call-preview,
.chat-tool-calls--compact .chat-tool-call-value {
  font-size: 0.6875rem;
}

@keyframes tool-call-pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.4;
  }
}

/* Streaming indicator */
.chat-message--streaming {
  align-self: flex-start;
  background: var(--bg-elevated, var(--bg-secondary));
  color: var(--text);
  border-bottom-left-radius: 4px;
  opacity: 0.9;
}

.chat-typing-indicator {
  display: inline-flex;
  gap: 4px;
  padding: 4px 0;
}

.chat-typing-indicator span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-secondary);
  animation: chat-typing-bounce 1.4s infinite ease-in-out;
}

.chat-typing-indicator span:nth-child(1) { animation-delay: 0s; }
.chat-typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.chat-typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

@keyframes chat-typing-bounce {
  0%, 80%, 100% { opacity: 0.3; }
  40% { opacity: 1; }
}

/* Chat waiting state */
.chat-message-content--waiting {
  color: var(--text-muted);
  font-style: italic;
  font-size: 13px;
}

.quick-chat-panel-waiting {
  color: var(--text-muted) !important;
  font-style: italic;
}

/* Input area */
.chat-input-area {
  position: relative;
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: flex-end;
  gap: 8px;
}

/* === Chat Skill Menu === */
.chat-skill-menu {
  position: absolute;
  left: var(--space-lg);
  bottom: calc(100% + var(--space-xs));
  min-width: calc((var(--space-xl) * 10) + var(--space-2xl) + (var(--space-xs) * 2));
  max-width: calc(100% - (var(--space-lg) * 2));
  max-height: calc(var(--space-xl) * 10);
  overflow-y: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 50;
}

.chat-skill-menu-item {
  width: 100%;
  border: none;
  background: transparent;
  color: inherit;
  text-align: left;
  padding: var(--space-sm) var(--space-md);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  transition: background var(--transition-fast);
}

.chat-skill-menu-item:hover,
.chat-skill-menu-item--highlighted {
  background: var(--card-hover);
}

.chat-skill-menu-item:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring-strong);
  background: var(--card-hover);
}

.chat-skill-menu-item-name {
  font-size: 0.8125rem;
  color: var(--text);
  font-family: var(--font-mono);
}

.chat-skill-menu-item-description {
  font-size: 0.75rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: calc((var(--space-xl) * 10) + var(--space-lg) + var(--space-xs));
}

.chat-skill-menu-empty {
  padding: var(--space-sm) var(--space-md);
  color: var(--text-muted);
  font-size: 0.8125rem;
}

.chat-input-textarea {
  flex: 1;
  resize: none;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 14px;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  line-height: 1.4;
  max-height: 120px;
  min-height: 40px;
}

.chat-input-textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.chat-input-send {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: var(--accent);
  color: var(--accent-text, #fff);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.chat-input-send:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.chat-input-stop {
  width: calc(var(--space-xl) * 2);
  height: calc(var(--space-xl) * 2);
  border-radius: var(--radius-md);
  border: none;
  background: color-mix(in srgb, var(--color-error) 15%, transparent);
  color: var(--color-error);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background var(--transition-fast), transform var(--transition-fast), color var(--transition-fast);
}

.chat-input-stop:hover {
  background: color-mix(in srgb, var(--color-error) 25%, transparent);
}

.chat-input-stop:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring-strong);
}

.chat-input-stop:active {
  transform: scale(0.97);
}

/* === Chat Pending Message === */
.chat-pending-message {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--todo) 10%, transparent);
  color: var(--text-muted);
  font-size: 12px;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.chat-pending-message span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.chat-pending-message-dismiss {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  padding: var(--space-xs);
  line-height: 1;
  flex-shrink: 0;
  font-size: 14px;
}

.chat-pending-message-dismiss:hover {
  color: var(--text-muted);
}

/* The mobile-only "New Chat" footer button is hidden on desktop; the
   desktop layout uses the .chat-sidebar-header button instead. */
.chat-sidebar-footer {
  display: none;
}

/* === Mobile: one pane at a time =========================================
   Sidebar (session list) and thread are siblings of .chat-view. On mobile
   we show whichever one is "active" full-width: when the sidebar is
   visible, the thread is hidden; when the sidebar is hidden (a session is
   open), the sidebar is collapsed via .chat-sidebar--hidden and the
   thread takes the full viewport. The thread already renders a back
   button (ChevronLeft) on mobile to flip back to the session list. */
@media (max-width: 768px) {
  .chat-sidebar {
    width: 100%;
    min-width: 0;
    border-right: none;
  }

  /* When the sidebar is shown, the thread is hidden so only the session
     list is visible. When the sidebar is hidden, the thread fills the
     viewport. Adjacent-sibling selector keeps logic in CSS only. */
  .chat-sidebar:not(.chat-sidebar--hidden) + .chat-thread {
    display: none;
  }

  /* On mobile, the "New Chat" affordance moves to a full-width pinned
     footer. The desktop top-header button is hidden to free the screen
     space for the search field and session list. */
  .chat-sidebar-header {
    display: none;
  }

  .chat-sidebar-footer {
    display: block;
    padding: var(--space-sm) var(--space-md);
    padding-bottom: max(var(--space-sm), env(safe-area-inset-bottom, 0));
    border-top: 1px solid var(--border);
    background: var(--bg-secondary);
  }

  .chat-sidebar-footer .chat-sidebar-footer-btn {
    width: 100%;
    justify-content: center;
    min-height: 40px;
  }

  .chat-thread-header {
    flex-wrap: wrap;
  }

  .chat-message--assistant .chat-message-render-toggle {
    opacity: 1;
  }
}