/* ============================================================
 * Cowork demo replica — design tokens 来自 Claude.app 实测
 * 仅用于本地演讲 demo
 * ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Source+Serif+Pro:wght@400;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
button, input, textarea { font: inherit; color: inherit; }
[hidden] { display: none !important; }

:root {
  --bg-canvas: #faf9f5;
  --bg-elevated: #ffffff;
  --bg-soft: #f4f0ea;
  --bg-soft-2: #ede8e1;
  --border: #e3ddd5;
  --border-strong: #c6c0b7;
  --text-1: #29261b;
  --text-2: #535146;
  --text-3: #737163;
  --text-4: #9e9891;
  --accent: #d97757;
  --accent-soft: #f4dacb;
  --accent-pro: #6457b8;
  --success: #4f7a2b;
  --danger: #c0524e;
  --info: #2f6cb3;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,.14);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --topbar-h: 44px;
  --footer-h: 30px;
  --sidebar-w: 264px;
  --rightbar-w: 304px;
  --ease: cubic-bezier(.4,0,.2,1);

  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-serif: "Source Serif Pro", "Songti SC", Georgia, serif;
  --font-mono: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
}

.darkTheme {
  --bg-canvas: #262624;
  --bg-elevated: #2f2e2b;
  --bg-soft: #1e1d1b;
  --bg-soft-2: #181715;
  --border: #3b3933;
  --border-strong: #555148;
  --text-1: #f5f4ef;
  --text-2: #d6d3c8;
  --text-3: #a6a39a;
  --text-4: #807c72;
  --accent: #e08b6c;
  --accent-soft: #4a2e22;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,.35);
  --shadow-lg: 0 12px 40px rgba(0,0,0,.45);
}

html, body {
  height: 100%;
  background: var(--bg-canvas);
  color: var(--text-1);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* =================== APP =================== */
.app {
  display: grid;
  grid-template-rows: var(--topbar-h) 1fr var(--footer-h);
  height: 100vh;
  width: 100vw;
}

/* =================== TOPBAR =================== */
.topbar {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 12px;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
  user-select: none;
  -webkit-app-region: drag;
}
.topbar__left { display: flex; align-items: center; gap: 14px; }
.topbar__logo { color: var(--accent); display: flex; align-items: center; }
.topbar__tabs { display: flex; gap: 2px; background: var(--bg-soft); padding: 3px; border-radius: var(--radius-md); }
.tab {
  background: transparent;
  border: 0;
  padding: 4px 14px;
  font-size: 13px;
  color: var(--text-3);
  border-radius: 7px;
  cursor: pointer;
  transition: all .15s var(--ease);
}
.tab:hover { color: var(--text-1); }
.tab--active {
  background: var(--bg-elevated);
  color: var(--text-1);
  box-shadow: var(--shadow-sm);
  font-weight: 500;
}
.topbar__center { display: flex; justify-content: center; }
.topbar__breadcrumb { font-size: 13px; color: var(--text-2); font-weight: 500; }
.topbar__right { display: flex; align-items: center; justify-content: flex-end; gap: 8px; }
.iconbtn {
  width: 30px; height: 30px;
  border: 0; background: transparent;
  border-radius: var(--radius-sm);
  color: var(--text-3);
  font-size: 17px;
  cursor: pointer;
}
.iconbtn:hover { background: var(--bg-soft); color: var(--text-1); }
.avatar {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--accent);
  color: white;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 600;
}

/* =================== MAIN GRID =================== */
.main {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr var(--rightbar-w);
  overflow: hidden;
}
@media (max-width: 980px) {
  .main { grid-template-columns: var(--sidebar-w) 1fr; }
  .rightbar { display: none; }
}
@media (max-width: 900px) {
  :root { --sidebar-w: 220px; }
}

/* =================== SIDEBAR =================== */
.sidebar {
  background: var(--bg-soft);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.sidebar__head { padding: 12px; }
.newtask-btn {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  padding: 8px 12px;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-1);
  transition: all .15s var(--ease);
}
.newtask-btn:hover { border-color: var(--border-strong); box-shadow: var(--shadow-sm); }
.newtask-btn__plus { color: var(--accent); font-size: 16px; line-height: 1; }
.sidebar__hint {
  padding: 0 14px 12px;
  font-size: 11.5px;
  color: var(--text-4);
  line-height: 1.5;
}
.sidebar__section { flex: 1; overflow-y: auto; padding: 0 8px; }
.sidebar__section-label {
  padding: 6px 8px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-4);
  text-transform: uppercase;
  letter-spacing: 0.4px;
}
.task-list { list-style: none; }
.task-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 9px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  color: var(--text-2);
  margin-bottom: 1px;
  transition: background .12s var(--ease);
  position: relative;
}
.task-item:hover { background: var(--bg-elevated); color: var(--text-1); }
.task-item--active { background: var(--bg-elevated); color: var(--text-1); font-weight: 500; box-shadow: var(--shadow-sm); }
.task-item__icon { font-size: 14px; width: 18px; text-align: center; }
.task-item__title { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.task-item__cat {
  font-size: 10px;
  color: var(--text-4);
  background: transparent;
  padding: 1px 4px;
  border-radius: 4px;
  opacity: 0;
  transition: opacity .15s var(--ease);
}
.task-item:hover .task-item__cat,
.task-item--active .task-item__cat { opacity: 0.7; background: var(--bg-soft-2); }
.task-item--active .task-item__cat { background: var(--accent-soft); color: var(--accent); opacity: 1; }

.sidebar__foot { padding: 8px; border-top: 1px solid var(--border); display: flex; flex-direction: column; gap: 2px; }
.sidebar__link {
  display: block; text-align: left;
  background: transparent; border: 0;
  padding: 6px 9px;
  font-size: 12.5px;
  color: var(--text-3);
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.sidebar__link:hover { background: var(--bg-elevated); color: var(--text-1); }

/* =================== CANVAS =================== */
.canvas {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg-canvas);
}
.empty-state {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px;
  text-align: center;
}
.empty-state__title {
  font-family: var(--font-serif);
  font-size: 38px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text-1);
  margin-bottom: 14px;
}
.empty-state__subtitle {
  font-size: 16px;
  color: var(--text-3);
  margin-bottom: 32px;
}
.empty-state__hint {
  font-size: 13px;
  color: var(--text-4);
  padding: 10px 18px;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-md);
}

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px 28px 8px;
  scroll-behavior: smooth;
}
.msg {
  max-width: 820px;
  margin: 0 auto 18px;
  display: flex;
  gap: 12px;
  animation: msgIn .25s var(--ease);
}
@keyframes msgIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.msg__avatar {
  width: 28px; height: 28px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 600;
  flex-shrink: 0;
  margin-top: 2px;
}
.msg--user .msg__avatar { background: var(--accent); color: white; }
.msg--assistant .msg__avatar { background: var(--text-1); color: var(--bg-canvas); font-family: serif; font-style: italic; }
.msg__body { flex: 1; min-width: 0; }
.msg__role { font-size: 11.5px; color: var(--text-4); margin-bottom: 4px; font-weight: 500; }

.bubble {
  border-radius: var(--radius-lg);
  padding: 12px 16px;
  font-size: 14.5px;
  line-height: 1.6;
}
.msg--user .bubble {
  background: #e7efd8;     /* greenish per Simon Willison's description */
  color: #2a3a18;
  border: 1px solid #d4e0c2;
}
.darkTheme .msg--user .bubble {
  background: #3b4a26;
  color: #e9f0d4;
  border-color: #4d5e30;
}
.msg--assistant .bubble {
  background: transparent;
  color: var(--text-1);
  padding: 0;
}
.bubble pre { font-family: var(--font-mono); font-size: 12.5px; background: var(--bg-soft); padding: 10px 12px; border-radius: var(--radius-sm); overflow-x: auto; }
.bubble code:not(pre code) { font-family: var(--font-mono); font-size: 13px; background: var(--bg-soft); padding: 1px 5px; border-radius: 4px; }

/* =========== TOOL CARD (general) =========== */
.tool {
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  border-radius: var(--radius-md);
  margin: 8px 0;
  overflow: hidden;
  font-size: 13px;
  box-shadow: var(--shadow-sm);
}
.tool__head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  cursor: pointer;
  user-select: none;
}
.tool__head:hover { background: var(--bg-soft); }
.tool__icon {
  width: 22px; height: 22px;
  border-radius: 5px;
  background: var(--bg-soft);
  display: flex; align-items: center; justify-content: center;
  font-size: 13px;
  flex-shrink: 0;
}
.tool__title { flex: 1; font-weight: 500; color: var(--text-1); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tool__status { font-size: 11px; color: var(--text-4); }
.tool__status--success { color: var(--success); }
.tool__status--running { color: var(--accent); }
.tool__chev { font-size: 10px; color: var(--text-4); transition: transform .15s var(--ease); }
.tool--open .tool__chev { transform: rotate(90deg); }
.tool__body {
  display: none;
  padding: 0 12px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-2);
}
.tool--open .tool__body { display: block; }
.tool__sec { margin-top: 8px; }
.tool__sec-label { font-size: 10.5px; text-transform: uppercase; color: var(--text-4); margin-bottom: 4px; letter-spacing: 0.4px; font-family: var(--font-sans); }
.tool__pre {
  background: var(--bg-soft);
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 180px;
  overflow-y: auto;
}
/* tool variants */
.tool--bash .tool__icon { background: #1d1d1b; color: #84e887; }
.tool--read .tool__icon, .tool--edit .tool__icon, .tool--write .tool__icon { background: var(--accent-soft); color: var(--accent); }
.tool--mcp .tool__icon { background: #ece5f7; color: var(--accent-pro); }
.darkTheme .tool--mcp .tool__icon { background: #34284a; }

/* skill chip */
.skill-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  margin: 4px 0;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 12px;
  color: var(--text-2);
}
.skill-chip__dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent-pro); }

/* agent card */
.agent-card {
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent-pro);
  background: var(--bg-elevated);
  border-radius: var(--radius-md);
  padding: 10px 12px;
  margin: 8px 0;
}
.agent-card__head { display: flex; align-items: center; gap: 8px; font-weight: 500; font-size: 13px; margin-bottom: 6px; }
.agent-card__type { font-size: 11px; color: var(--accent-pro); background: var(--accent-soft); padding: 2px 8px; border-radius: 4px; }
.darkTheme .agent-card__type { background: #34284a; }
.agent-card__desc { font-size: 12.5px; color: var(--text-2); line-height: 1.5; }
.agent-card__result { margin-top: 8px; font-size: 12px; color: var(--text-3); border-top: 1px dashed var(--border); padding-top: 6px; }
.agent-card__result::before { content: "↳ "; color: var(--accent-pro); }

/* spawn chip */
.spawn-chip {
  display: inline-block;
  border: 1px dashed var(--accent);
  background: var(--accent-soft);
  color: var(--text-1);
  padding: 8px 12px;
  border-radius: var(--radius-md);
  margin: 8px 0;
  font-size: 12.5px;
  max-width: 360px;
}
.spawn-chip__label { font-size: 10px; color: var(--accent); font-weight: 600; text-transform: uppercase; letter-spacing: 0.6px; }
.spawn-chip__title { font-weight: 600; margin: 3px 0; }
.spawn-chip__tldr { color: var(--text-3); font-size: 11.5px; }

/* chapter */
.chapter {
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 820px;
  margin: 22px auto;
  font-size: 12px;
  color: var(--text-4);
}
.chapter::before, .chapter::after { content: ""; flex: 1; height: 1px; background: var(--border); }
.chapter__pill {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 14px;
  color: var(--text-2);
  font-weight: 500;
}

/* todo list */
.todos {
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  margin: 8px 0;
  font-size: 13px;
}
.todos__head { font-size: 11px; font-weight: 600; color: var(--text-4); text-transform: uppercase; letter-spacing: 0.4px; margin-bottom: 6px; }
.todo { display: flex; align-items: flex-start; gap: 8px; padding: 3px 0; }
.todo__box { width: 14px; height: 14px; border: 1.5px solid var(--text-4); border-radius: 3px; flex-shrink: 0; margin-top: 3px; display: flex; align-items: center; justify-content: center; font-size: 10px; }
.todo--completed .todo__box { background: var(--success); border-color: var(--success); color: white; }
.todo--in_progress .todo__box { border-color: var(--accent); background: var(--accent-soft); }
.todo--in_progress .todo__box::after { content: "●"; color: var(--accent); font-size: 8px; }
.todo--completed .todo__text { color: var(--text-4); text-decoration: line-through; }
.todo__text { flex: 1; color: var(--text-2); }

/* thinking */
.thinking {
  background: var(--bg-soft);
  border-left: 3px solid var(--text-4);
  padding: 8px 12px;
  margin: 8px 0;
  font-size: 12.5px;
  color: var(--text-3);
  font-style: italic;
  border-radius: var(--radius-sm);
}
.thinking__label { font-style: normal; font-size: 10.5px; font-weight: 600; color: var(--text-4); text-transform: uppercase; letter-spacing: 0.4px; margin-bottom: 4px; }

/* =================== COMPOSER =================== */
.composer {
  margin: 12px 24px 16px;
  max-width: 820px;
  align-self: center;
  width: calc(100% - 48px);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 4px 4px 4px 12px;
  box-shadow: var(--shadow-sm);
}
.composer__textarea {
  width: 100%;
  background: transparent;
  border: 0;
  resize: none;
  padding: 8px 0;
  outline: none;
  color: var(--text-1);
}
.composer__bar { display: flex; align-items: center; padding: 0 4px 2px; gap: 8px; }
.composer__attach { background: transparent; border: 0; color: var(--text-3); font-size: 16px; cursor: pointer; padding: 4px 6px; }
.composer__model { font-size: 11.5px; color: var(--text-3); flex: 1; }
.composer__send {
  width: 28px; height: 28px;
  background: var(--accent);
  color: white;
  border: 0;
  border-radius: 50%;
  cursor: pointer;
  font-size: 14px;
}

/* =================== RIGHTBAR =================== */
.rightbar {
  background: var(--bg-soft);
  border-left: 1px solid var(--border);
  padding: 14px 14px 18px;
  overflow-y: auto;
}
.rb-section { margin-bottom: 18px; }
.rb-head {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-4);
  text-transform: uppercase;
  letter-spacing: 0.4px;
  margin-bottom: 8px;
}
.rb-progress { padding: 10px 12px; background: var(--bg-elevated); border-radius: var(--radius-md); border: 1px solid var(--border); }
.rb-progress__hint { font-size: 12px; color: var(--text-4); font-style: italic; }
.rb-progress__steps { display: flex; flex-direction: column; gap: 4px; }
.rb-step { display: flex; align-items: center; gap: 8px; font-size: 12.5px; color: var(--text-2); }
.rb-step__dot { width: 8px; height: 8px; border-radius: 50%; background: var(--border-strong); }
.rb-step--done .rb-step__dot { background: var(--success); }
.rb-step--current .rb-step__dot { background: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); animation: pulse 1.4s infinite; }
@keyframes pulse { 50% { opacity: .6; } }

.rb-list { list-style: none; }
.rb-list li {
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  font-size: 12.5px;
  color: var(--text-2);
  cursor: pointer;
  display: flex; align-items: center; gap: 6px;
}
.rb-list li:hover { background: var(--bg-elevated); }
.rb-list .rb-empty { font-style: italic; color: var(--text-4); cursor: default; }
.rb-list .rb-empty:hover { background: transparent; }

.rb-context { background: var(--bg-elevated); border: 1px solid var(--border); border-radius: var(--radius-md); padding: 10px 12px; }
.rb-ctx-row { display: flex; gap: 8px; padding: 4px 0; font-size: 12px; }
.rb-ctx-key { width: 50px; color: var(--text-4); font-weight: 500; flex-shrink: 0; }
.rb-ctx-val { flex: 1; color: var(--text-2); word-break: break-all; }

/* =================== FOOTER =================== */
.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 14px;
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  font-size: 11.5px;
  color: var(--text-4);
}
.footer__pill {
  padding: 2px 8px;
  background: var(--bg-soft);
  border-radius: 4px;
  color: var(--text-3);
}
.footer__pill--ghost { background: transparent; }
.footer__center { font-style: italic; }

/* =================== DEMO CONTROLS =================== */
.demo-controls {
  position: fixed;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  border-radius: 999px;
  padding: 6px 14px;
  z-index: 50;
}
.dc-btn {
  width: 30px; height: 30px;
  background: transparent;
  border: 0;
  border-radius: 50%;
  color: var(--text-2);
  cursor: pointer;
  font-size: 13px;
}
.dc-btn:hover { background: var(--bg-soft); }
.dc-btn--primary {
  background: var(--accent);
  color: white;
  font-size: 12px;
}
.dc-btn--primary:hover { background: var(--accent); filter: brightness(1.05); }
.dc-mode { display: flex; gap: 2px; padding-right: 10px; margin-right: 6px; border-right: 1px solid var(--border); }
.dc-mode-btn {
  background: transparent; border: 0;
  padding: 4px 10px;
  font-size: 11.5px;
  color: var(--text-3);
  border-radius: 999px;
  cursor: pointer;
  font-weight: 500;
}
.dc-mode-btn--active { background: var(--accent); color: white; }
.dc-speed { display: flex; align-items: center; gap: 2px; padding-left: 10px; margin-left: 6px; border-left: 1px solid var(--border); font-size: 11px; color: var(--text-4); }
.dc-speed > span { margin-right: 4px; }
.dc-spd {
  background: transparent; border: 0;
  padding: 3px 7px;
  font-size: 11px;
  color: var(--text-3);
  cursor: pointer;
  border-radius: 4px;
}
.dc-spd--active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.dc-progress { padding-left: 10px; margin-left: 6px; border-left: 1px solid var(--border); font-size: 11px; color: var(--text-4); font-family: var(--font-mono); }