:root {
  --bg-primary: #181818;
  --bg-secondary: #141414;
  --bg-surface: #1e1e1e;
  --bg-input: rgba(228, 228, 228, 0.04);
  --bg-hover: rgba(228, 228, 228, 0.08);
  --bg-user-msg: rgba(228, 228, 228, 0.06);
  --bg-agent-msg: transparent;
  --bg-tool: rgba(228, 228, 228, 0.03);
  --bg-code: rgba(0, 0, 0, 0.25);

  --text-primary: rgba(228, 228, 228, 0.92);
  --text-secondary: rgba(228, 228, 228, 0.70);
  --text-tertiary: rgba(228, 228, 228, 0.48);
  --text-quaternary: rgba(228, 228, 228, 0.32);

  --accent-green: #3fa266;
  --accent-red: #e34671;
  --accent-yellow: #f1b467;
  --accent-blue: #3794ff;
  --accent-purple: #b180d7;
  --accent-link: #81a1c1;

  --border-color: rgba(228, 228, 228, 0.08);

  --radius: 10px;
  --radius-sm: 6px;

  --header-height: 44px;

  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  overflow: hidden;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}

#app {
  display: flex;
  flex-direction: column;
  height: 100%;
  max-width: 600px;
  margin: 0 auto;
}

/* --- Header --- */

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding: 0 14px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
  z-index: 10;
}

.header-left, .header-right {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-secondary);
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.dot.connected { background: var(--accent-green); }
.dot.disconnected { background: var(--accent-red); }
.dot.reconnecting { background: var(--accent-yellow); }

#agent-status-icon { font-size: 12px; }

/* --- Messages area --- */

#messages {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  -webkit-overflow-scrolling: touch;
  scroll-behavior: smooth;
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  text-align: center;
  color: var(--text-tertiary);
  gap: 8px;
}

.empty-state code {
  font-family: var(--font-mono);
  font-size: 11px;
  background: var(--bg-surface);
  padding: 3px 7px;
  border-radius: 4px;
  color: var(--accent-blue);
}

.hint { font-size: 12px; }

/* --- Chat element base --- */

.chat-el {
  animation: fadeIn 0.12s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* --- Human message --- */

.el-human {
  display: flex;
  justify-content: flex-end;
  padding: 2px 0;
}

.human-bubble {
  max-width: 85%;
  padding: 6px 12px;
  background: var(--bg-user-msg);
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  word-break: break-word;
}

.mentions-row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 3px;
}

.mention-badge {
  font-size: 11px;
  padding: 0px 5px;
  border-radius: 3px;
  background: rgba(55, 148, 255, 0.15);
  color: var(--accent-blue);
  font-family: var(--font-mono);
}

.human-text {
  font-size: 13px;
  line-height: 1.5;
  white-space: pre-wrap;
}

/* --- Assistant message --- */

.el-assistant {
  display: flex;
  justify-content: flex-start;
  padding: 2px 0;
}

.assistant-bubble {
  max-width: 95%;
  padding: 6px 10px;
  word-break: break-word;
  overflow: hidden;
}

.assistant-content {
  font-size: 13px;
  line-height: 1.6;
  max-height: 500px;
  overflow-y: auto;
}

.assistant-content.markdown-body p { margin-bottom: 6px; }
.assistant-content.markdown-body p:last-child { margin-bottom: 0; }
.assistant-content.markdown-body ol,
.assistant-content.markdown-body ul { padding-left: 18px; margin-bottom: 6px; }
.assistant-content.markdown-body li { margin-bottom: 2px; }
.assistant-content.markdown-body code {
  font-family: var(--font-mono);
  font-size: 12px;
  background: rgba(228, 228, 228, 0.06);
  padding: 1px 4px;
  border-radius: 3px;
}
.assistant-content.markdown-body strong,
.assistant-content.markdown-body .font-semibold { font-weight: 600; }
.assistant-content.markdown-body a {
  color: var(--accent-link);
  text-decoration: none;
}

/* --- Code blocks --- */

.code-block {
  margin: 6px 0 4px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg-code);
  border: 1px solid var(--border-color);
}

.code-block-header {
  padding: 3px 8px;
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-tertiary);
  background: rgba(228, 228, 228, 0.03);
  border-bottom: 1px solid var(--border-color);
}

.code-block pre {
  margin: 0;
  padding: 6px 8px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.5;
  color: var(--text-primary);
  white-space: pre;
}

.code-block code { background: none; padding: 0; }

/* --- Tool call line --- */

.el-tool { padding: 1px 0; }

.tool-line {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.tool-line.completed .tool-icon { color: var(--text-tertiary); }
.tool-line.loading .tool-icon { color: var(--accent-yellow); }

.tool-icon {
  flex-shrink: 0;
  font-size: 12px;
  width: 14px;
  text-align: center;
}

.tool-action {
  font-weight: 500;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.tool-details {
  color: var(--text-tertiary);
  overflow: hidden;
  text-overflow: ellipsis;
}

.tool-file-info {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
  flex-shrink: 0;
  font-size: 11px;
}

.tool-filename {
  color: var(--text-secondary);
  max-width: 140px;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tool-additions { color: var(--accent-green); }
.tool-deletions { color: var(--accent-red); }

.tool-summary {
  color: var(--text-tertiary);
  overflow: hidden;
  text-overflow: ellipsis;
}

/* --- Thought block --- */

.el-thought { padding: 0 0; }

.thought-line {
  padding: 1px 8px;
  font-size: 12px;
  color: var(--text-quaternary);
}

/* --- Plan block --- */

.el-plan { padding: 2px 0; }

.plan-card {
  padding: 8px 10px;
  background: rgba(228, 228, 228, 0.03);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.plan-label {
  font-size: 10px;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.plan-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
}

.plan-description {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.4;
}

.plan-todo-list {
  max-height: 200px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 4px 0;
}

.plan-todo-item {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.3;
}

.plan-todo-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 3px;
}

.plan-todo-pending { background: var(--text-tertiary); }
.plan-todo-completed { background: var(--accent-green); }
.plan-todo-in_progress { background: var(--accent-blue); }

.plan-todo-text {
  flex: 1;
  min-width: 0;
}

.plan-progress {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 16px;
}

.plan-progress-track {
  flex: 1;
  height: 3px;
  background: var(--border-color);
  border-radius: 2px;
  overflow: hidden;
}

.plan-progress-bar {
  height: 100%;
  background: var(--accent-green);
  border-radius: 2px;
  transition: width 0.3s ease;
}

.plan-progress-text {
  font-size: 10px;
  font-family: var(--font-mono);
  color: var(--text-tertiary);
  flex-shrink: 0;
}

.plan-actions-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 4px;
}

.plan-btn {
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 4px;
  border: none;
  cursor: pointer;
  font-family: inherit;
}

.plan-btn-build {
  background: var(--accent-blue);
  color: #fff;
}

.plan-btn-view {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.plan-model-badge {
  font-size: 11px;
  color: var(--text-tertiary);
  margin-left: auto;
}

/* --- Run command --- */

.el-run-command { padding: 2px 0; }

.run-card {
  padding: 8px 10px;
  background: rgba(228, 228, 228, 0.03);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.run-header {
  font-size: 12px;
}

.run-description {
  color: var(--text-secondary);
  font-weight: 500;
}

.run-candidates {
  color: var(--text-tertiary);
}

.run-command-block {
  background: rgba(0, 0, 0, 0.3);
  border-radius: 4px;
  padding: 6px 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-primary);
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 200px;
  overflow-y: auto;
}

.run-prompt {
  color: var(--accent-green);
  user-select: none;
}

.run-actions-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.run-btn {
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 4px;
  border: none;
  cursor: pointer;
  font-family: inherit;
}

.run-btn-run {
  background: var(--accent-green);
  color: #fff;
}

.run-btn-skip {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.run-btn-allow {
  background: var(--accent-blue);
  color: #fff;
}

/* --- Loading indicator --- */

.el-loading { padding: 2px 0; }

.loading-dots {
  display: flex;
  gap: 3px;
  padding: 2px 8px;
}

.dot-anim {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--text-quaternary);
  animation: dotBounce 1.4s ease-in-out infinite;
}

.dot-anim:nth-child(2) { animation-delay: 0.16s; }
.dot-anim:nth-child(3) { animation-delay: 0.32s; }

@keyframes dotBounce {
  0%, 80%, 100% { opacity: 0.3; transform: scale(0.8); }
  40% { opacity: 1; transform: scale(1); }
}

/* --- Approval Bar --- */

.approval-bar {
  padding: 10px 14px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  flex-shrink: 0;
  z-index: 10;
}

.approval-bar.hidden { display: none; }

.approval-desc {
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 8px;
  text-align: center;
}

.approval-actions { display: flex; gap: 10px; }

/* --- Buttons --- */

.btn {
  border: none;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: opacity 0.15s;
  -webkit-tap-highlight-color: transparent;
}

.btn:active { transform: scale(0.98); }
.btn:disabled { opacity: 0.35; cursor: not-allowed; }

.btn-approve {
  flex: 1;
  height: 48px;
  background: var(--accent-green);
  color: #fff;
}

.btn-reject {
  flex: 1;
  height: 48px;
  background: var(--accent-red);
  color: #fff;
}

.btn-approve:hover:not(:disabled), .btn-reject:hover:not(:disabled) { opacity: 0.85; }

/* --- Input Bar --- */

#input-bar {
  padding: 8px 12px;
  padding-bottom: max(8px, env(safe-area-inset-bottom));
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  flex-shrink: 0;
  z-index: 10;
}

.input-wrapper {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  background: var(--bg-input);
  border-radius: var(--radius);
  padding: 4px 4px 4px 12px;
  border: 1px solid var(--border-color);
  transition: border-color 0.2s;
}

.input-wrapper:focus-within { border-color: rgba(228, 228, 228, 0.16); }

#message-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.4;
  resize: none;
  max-height: 120px;
  padding: 6px 0;
}

#message-input::placeholder { color: var(--text-quaternary); }
#message-input:disabled { opacity: 0.4; }

.btn-send {
  width: 36px;
  height: 36px;
  min-width: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-link);
  color: #fff;
  border-radius: 50%;
  padding: 0;
}

.btn-send:disabled { background: var(--text-quaternary); }

/* --- Toast --- */

#toast-container {
  position: fixed;
  top: 56px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 6px;
  pointer-events: none;
}

.toast {
  background: var(--bg-surface);
  color: var(--text-primary);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
  animation: toastIn 0.2s ease-out;
  white-space: nowrap;
}

.toast.error { border-left: 2px solid var(--accent-red); }
.toast.success { border-left: 2px solid var(--accent-green); }

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

/* --- Scrollbar --- */

#messages::-webkit-scrollbar { width: 4px; }
#messages::-webkit-scrollbar-track { background: transparent; }
#messages::-webkit-scrollbar-thumb { background: rgba(228, 228, 228, 0.12); border-radius: 2px; }

/* --- Window Bar --- */

.window-bar {
  display: flex;
  align-items: center;
  height: 32px;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
  z-index: 10;
  padding: 0 4px;
}

.window-bar.hidden { display: none; }

.window-list {
  display: flex;
  gap: 2px;
  overflow-x: auto;
  overflow-y: hidden;
  flex: 1;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  padding: 3px 0;
}

.window-list::-webkit-scrollbar { display: none; }

.window-item {
  flex-shrink: 0;
  padding: 3px 10px;
  font-size: 10px;
  border-radius: 4px;
  background: transparent;
  color: var(--text-quaternary);
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  font-family: var(--font-sans);
  transition: background 0.15s, color 0.15s, border-color 0.15s;
  -webkit-tap-highlight-color: transparent;
}

.window-item:active { transform: scale(0.97); }
.window-item.active {
  background: var(--bg-hover);
  color: var(--text-primary);
  border-color: var(--border-color);
  font-weight: 500;
}

/* --- Tab Bar --- */

.tab-bar {
  display: flex;
  align-items: center;
  height: 36px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
  z-index: 10;
  padding: 0 4px;
  gap: 2px;
}

.tab-bar.hidden { display: none; }

.tab-list {
  display: flex;
  gap: 2px;
  overflow-x: auto;
  overflow-y: hidden;
  flex: 1;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  padding: 4px 0;
}

.tab-list::-webkit-scrollbar { display: none; }

.tab-item {
  flex-shrink: 0;
  padding: 4px 10px;
  font-size: 11px;
  border-radius: 4px;
  background: transparent;
  color: var(--text-tertiary);
  border: none;
  cursor: pointer;
  white-space: nowrap;
  max-width: 140px;
  overflow: hidden;
  text-overflow: ellipsis;
  font-family: var(--font-sans);
  transition: background 0.15s, color 0.15s;
  -webkit-tap-highlight-color: transparent;
}

.tab-item:active { transform: scale(0.97); }
.tab-item.active {
  background: var(--bg-hover);
  color: var(--text-primary);
  font-weight: 500;
}

.tab-item .tab-status {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  margin-right: 4px;
  vertical-align: middle;
}

.tab-status.running { background: var(--accent-yellow); }
.tab-status.completed { background: var(--accent-green); }
.tab-status.error { background: var(--accent-red); }

.tab-new-btn {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 4px;
  border: none;
  background: transparent;
  color: var(--text-tertiary);
  font-size: 16px;
  font-weight: 400;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  -webkit-tap-highlight-color: transparent;
}

.tab-new-btn:active { background: var(--bg-hover); }

/* --- Mode/Model Pills --- */

.mode-model-bar {
  display: flex;
  gap: 6px;
  margin-bottom: 6px;
}

.pill {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  background: var(--bg-input);
  color: var(--text-secondary);
  font-size: 11px;
  font-family: var(--font-sans);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: background 0.15s, border-color 0.15s;
}

.pill:active { background: var(--bg-hover); }

.pill-icon {
  font-size: 12px;
  line-height: 1;
  opacity: 0.7;
}

.pill-chevron {
  font-size: 8px;
  opacity: 0.5;
  line-height: 1;
}

/* --- Bottom Sheet --- */

.sheet-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 200;
}

.sheet-overlay.hidden { display: none; }

.bottom-sheet {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  max-width: 600px;
  margin: 0 auto;
  background: var(--bg-surface);
  border-top-left-radius: 14px;
  border-top-right-radius: 14px;
  padding: 12px 0;
  z-index: 210;
  max-height: 60vh;
  overflow-y: auto;
  animation: sheetSlideUp 0.2s ease-out;
}

.bottom-sheet.hidden { display: none; }

@keyframes sheetSlideUp {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}

.sheet-header {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 4px 16px 10px;
  border-bottom: 1px solid var(--border-color);
}

.sheet-list {
  display: flex;
  flex-direction: column;
  padding: 6px 0;
}

.sheet-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  font-size: 14px;
  color: var(--text-primary);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  border: none;
  background: none;
  width: 100%;
  font-family: var(--font-sans);
  text-align: left;
}

.sheet-item:active { background: var(--bg-hover); }

.sheet-item.selected {
  color: var(--accent-blue);
  font-weight: 500;
}

.sheet-item-icon {
  width: 20px;
  text-align: center;
  font-size: 14px;
  opacity: 0.7;
}

.sheet-item-check {
  font-size: 14px;
  color: var(--accent-blue);
}

.sheet-item-label {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
}

.sheet-item-tag {
  font-size: 10px;
  opacity: 0.5;
}

.sheet-item-right {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
  flex-shrink: 0;
}

.sheet-item-badge {
  font-size: 12px;
  opacity: 0.5;
  line-height: 1;
}

.sheet-divider {
  height: 1px;
  background: var(--border-color);
  margin: 4px 16px;
}

.sheet-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  font-size: 14px;
  color: var(--text-primary);
}

.toggle-switch {
  width: 36px;
  height: 20px;
  border-radius: 10px;
  background: var(--bg-hover);
  border: none;
  position: relative;
  cursor: pointer;
  transition: background 0.2s;
  padding: 0;
}

.toggle-switch.on {
  background: var(--accent-green);
}

.toggle-knob {
  display: block;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: white;
  position: absolute;
  top: 2px;
  left: 2px;
  transition: transform 0.2s;
}

.toggle-switch.on .toggle-knob {
  transform: translateX(16px);
}

/* --- Desktop --- */

@media (min-width: 768px) {
  .human-bubble { max-width: 75%; }
  .btn-approve, .btn-reject { height: 44px; }
}