:root {
  color-scheme: light;
  --bg: #f5f5f7;
  --chrome: rgba(255, 255, 255, .74);
  --sidebar: rgba(244, 246, 249, .82);
  --card: #ffffff;
  --card-soft: #fbfbfd;
  --ink: #1d1d1f;
  --muted: #6e6e73;
  --muted-2: #98a1b2;
  --line: #dfe3ea;
  --line-strong: #c7ceda;
  --blue: #0a64ff;
  --blue-soft: #e8f1ff;
  --green: #087f5b;
  --green-soft: #dcf7eb;
  --amber: #995200;
  --amber-soft: #fff3cf;
  --purple: #8b5cf6;
  --purple-soft: #f5efff;
  --red: #c9342c;
  --code-bg: #f6f7f9;
  --code-ink: #2f343d;
  --shadow: 0 18px 50px rgba(0, 0, 0, .10);
  --shadow-soft: 0 8px 24px rgba(0, 0, 0, .06);
  --radius-lg: 22px;
  --radius-md: 15px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", sans-serif;
  --mono: "SF Mono", "SFMono-Regular", ui-monospace, monospace;
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  overflow: hidden;
  color: var(--ink);
  background:
    radial-gradient(circle at 16% -8%, rgba(10, 100, 255, .12), transparent 30%),
    radial-gradient(circle at 92% 4%, rgba(120, 120, 128, .14), transparent 24%),
    var(--bg);
  font-family: var(--font);
  font-size: 13px;
  -webkit-font-smoothing: antialiased;
}

button,
input,
select,
textarea {
  font: inherit;
}

button,
select,
input,
textarea {
  border: 1px solid var(--line);
  border-radius: 11px;
  background: rgba(255, 255, 255, .86);
  color: var(--ink);
}

button {
  padding: 8px 12px;
  cursor: pointer;
}

button:hover {
  border-color: var(--line-strong);
  background: #fff;
}

button.active {
  border-color: var(--blue);
  background: var(--blue);
  color: #fff;
}

/* Press feedback on true pushbuttons only — rows and list items are selection
   surfaces and must not scale. */
.segmented button,
.trajectory-toolbar button,
.drawer-actions button,
.row-tools button,
.fb-send,
.feedback-submit,
.new-session-button {
  transition: transform 160ms var(--ease-out);
}

.segmented button:active,
.trajectory-toolbar button:active,
.drawer-actions button:active,
.row-tools button:active,
.fb-send:active,
.feedback-submit:active,
.new-session-button:active,
.activity-open-inspector:active {
  transform: scale(0.97);
}

select,
input,
textarea {
  width: 100%;
  padding: 9px 11px;
  outline: none;
}

textarea {
  resize: none;
}

input:focus,
select:focus,
textarea:focus {
  border-color: rgba(10, 100, 255, .72);
  box-shadow: 0 0 0 4px rgba(10, 100, 255, .12);
}

/* Top level is two panes (sessions | main). The inspector is second-level: it
   lives inside the Chat view (see .chat-split), so Trajectory and Waterfall
   never show it. Pane widths are CSS vars driven by drag handles (clamped in
   JS); panes share one layer and squeeze each other, never overlay. */
.shell {
  --left-w: 300px;
  display: grid;
  grid-template-columns: var(--left-w) 9px minmax(480px, 1fr);
  gap: 0;
  height: 100vh;
  padding: 12px;
}

.pane-divider {
  position: relative;
  align-self: stretch;
  cursor: col-resize;
  touch-action: none;
}

.pane-divider::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 4px;
  width: 1px;
  background: transparent;
  transition: background .12s ease;
}

.pane-divider:hover::after,
.pane-divider.dragging::after {
  width: 3px;
  left: 3px;
  border-radius: 2px;
  background: rgba(10, 100, 255, .45);
}

.left-pane,
.main-pane {
  min-height: 0;
  overflow: hidden;
  border: 1px solid rgba(198, 205, 218, .72);
  box-shadow: var(--shadow);
  backdrop-filter: blur(24px) saturate(1.2);
}

.left-pane {
  display: flex;
  flex-direction: column;
  gap: 12px;
  border-radius: var(--radius-lg);
  padding: 14px;
  background: var(--sidebar);
}

.main-pane {
  display: flex;
  flex-direction: column;
  border-radius: 26px;
  background: rgba(255, 255, 255, .82);
  transition: opacity 150ms var(--ease-out);
}

.main-pane.loading {
  opacity: .55;
  pointer-events: none;
}

/* Split views (Chat, Trajectory) manage their own inner scrollers, so the
   .view itself must not scroll or pad. Three classes to outrank .view.active. */
.view.split-view.active {
  display: flex;
  flex-direction: column;
  padding: 0;
  overflow: hidden;
}

/* Second-level inspector: a grid column inside the Chat and Waterfall views
   (the single #detailDrawer element is moved into the active split). Opening it
   squeezes the content column; it never overlays. */
.chat-split,
.wf-split {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.chat-split.inspector-open,
.wf-split.inspector-open {
  grid-template-columns: minmax(0, 1fr) 9px var(--inspector-w, 400px);
}

.chat-split > .pane-divider,
.wf-split > .pane-divider {
  display: none;
}

.chat-split.inspector-open > .pane-divider,
.wf-split.inspector-open > .pane-divider {
  display: block;
}

.conversation-scroll,
.waterfall-scroll {
  min-width: 0;
  overflow: auto;
  padding: 18px 20px;
}

.inspector {
  display: none;
  min-width: 0;
  flex-direction: column;
  overflow: auto;
  padding: 14px;
  background: #fbfcfe;
}

/* Enter only: content slides in from the right; Close stays instant
   (asymmetric timing — the system's response snaps). */
@keyframes inspector-enter {
  from {
    transform: translateX(16px);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.chat-split.inspector-open .inspector,
.wf-split.inspector-open .inspector {
  display: flex;
  animation: inspector-enter 200ms var(--ease-out);
}

/* Trajectory: structure tree (navigation) + event table (content). */
.traj-split {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
}

.traj-tree {
  overflow: auto;
  border-right: 1px solid var(--line);
  padding: 14px 10px 14px 14px;
  background: #fafbfd;
}

.traj-main {
  min-width: 0;
  overflow: auto;
  padding: 14px 20px 18px;
}

.brand,
.main-switcher,
.details-head,
.section-title,
.format-row,
.top-actions,
.toolbar,
.event-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand {
  justify-content: flex-start;
  padding: 2px 2px 4px;
}

.mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: linear-gradient(180deg, #2f6fff, #0a58d8);
  color: #fff;
  font-weight: 750;
  letter-spacing: -.02em;
  box-shadow: 0 8px 18px rgba(10, 100, 255, .24);
}

h1,
h2,
h3,
h4 {
  margin: 0;
  letter-spacing: -.03em;
}

h1 {
  font-size: 18px;
  font-weight: 700;
}

h2 {
  font-size: 25px;
  font-weight: 720;
}

h3 {
  font-size: 17px;
  font-weight: 700;
}

h4 {
  font-size: 16px;
}

.overline {
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.subtitle,
.source-line {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.source-line {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.control-card {
  border: 1px solid rgba(210, 216, 226, .88);
  border-radius: 17px;
  padding: 12px;
  background: rgba(255, 255, 255, .64);
  box-shadow: var(--shadow-soft);
}

.new-session-button {
  width: 100%;
  justify-content: center;
  border-radius: 14px;
  padding: 10px 12px;
  background: #fff;
  font-weight: 650;
  box-shadow: var(--shadow-soft);
}

.session-search-card {
  border: 1px solid rgba(210, 216, 226, .88);
  border-radius: 17px;
  padding: 12px;
  background: rgba(255, 255, 255, .64);
  box-shadow: var(--shadow-soft);
}

.session-list {
  flex: 1;
  min-height: 0;
  overflow: auto;
  display: grid;
  align-content: start;
  gap: 7px;
}

.session-row {
  width: 100%;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 3px;
  align-items: center;
  border: 1px solid transparent;
  border-radius: 14px;
  padding: 10px;
  background: transparent;
  text-align: left;
}

.session-row:hover,
.session-row.selected {
  border-color: #c7dcff;
  background: var(--blue-soft);
}

.session-row.child {
  margin-left: 14px;
  width: calc(100% - 14px);
  padding: 6px 10px;
}

.session-row.child .session-title {
  color: #5b6472;
  font-weight: 550;
  font-size: 12px;
}

.session-row.child .session-time {
  display: none;
}

.child-mark {
  color: #9aa5b8;
  font-family: var(--mono);
}

.kid-count {
  color: #2456b3;
  font-weight: 650;
}

.session-title,
.session-meta,
.session-time {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.session-title {
  color: #2f3440;
  font-weight: 650;
}

.session-meta,
.session-time {
  color: var(--muted);
  font-size: 12px;
}

.control-card.compact {
  display: grid;
  gap: 9px;
}

.field-label {
  display: block;
  margin-bottom: 7px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.session-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}

.session-stats strong,
.session-stats span {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 8px;
  background: rgba(247, 248, 250, .86);
  color: #3f4857;
}

.segmented {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.segmented button,
.detail-tabs button {
  border-radius: 999px;
  padding: 7px 12px;
  background: rgba(255, 255, 255, .72);
}

.segmented.large {
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(242, 244, 248, .86);
}

.segmented.large button {
  border-color: transparent;
  padding: 8px 13px;
}

.segmented button.active,
.detail-tabs button.active {
  border-color: rgba(198, 205, 218, .72);
  background: #fff;
  color: var(--ink);
  box-shadow: 0 5px 14px rgba(0, 0, 0, .08);
}

.status-pill {
  border: 1px solid rgba(8, 127, 91, .18);
  border-radius: 999px;
  padding: 7px 10px;
  background: var(--green-soft);
  color: var(--green);
  font-weight: 700;
  white-space: nowrap;
}

.trace-tree {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding-right: 2px;
}

/* Waterfall: fixed label column + uniform track column. Every bar's left/width
   percentage resolves against the SAME track width regardless of tree depth, so
   time positions align vertically; depth is shown by indenting the label only. */
.waterfall {
  width: 100%;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  padding: 12px 16px 16px;
  overflow: auto;
}

.wf {
  min-width: 640px;
}

.wf-row {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
}

.wf-head-row {
  position: sticky;
  top: 0;
  z-index: 1;
  background: #fff;
  border-bottom: 1px solid var(--line);
  padding-bottom: 6px;
  margin-bottom: 6px;
}

.wf-axis {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
}

.wf-label-col {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr) auto;
  gap: 7px;
  align-items: center;
  border: 0;
  border-radius: 7px;
  padding: 3px 6px 3px calc(6px + var(--depth, 0) * 14px);
  background: transparent;
  text-align: left;
  cursor: pointer;
}

.wf-label-col:hover,
.wf-label-col.selected {
  background: var(--blue-soft);
}

.wf-glyph {
  display: grid;
  place-items: center;
  width: 20px;
  height: 16px;
  border-radius: 5px;
  background: #eef1f6;
  color: #4b5565;
  font-size: 8.5px;
  font-weight: 750;
  font-family: var(--mono);
}

.wf-glyph.turn { background: var(--blue-soft); color: #2456b3; }
.wf-glyph.step { background: #eceff4; color: #4c586c; }
.wf-glyph.tool { background: var(--green-soft); color: var(--green); }
.wf-glyph.llm { background: var(--amber-soft); color: var(--amber); }
.wf-glyph.error { background: #fde8e6; color: var(--red); }

.wf-name {
  overflow: hidden;
  color: #3a4356;
  font-size: 11.5px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.wf-dur {
  color: #9aa5b8;
  font-family: var(--mono);
  font-size: 10.5px;
  font-variant-numeric: tabular-nums;
}

.wf-track {
  position: relative;
  height: 20px;
  border-radius: 4px;
  background-image:
    linear-gradient(90deg, rgba(135, 145, 160, .18) 1px, transparent 1px);
  background-size: 25% 100%;
  background-repeat: repeat-x;
}

.wf-bar {
  position: absolute;
  top: 3px;
  height: 14px;
  min-width: 2px;
  border: 0;
  border-radius: 4px;
  padding: 0;
  background: var(--green);
  cursor: pointer;
}

.wf-bar.turn { background: var(--blue); }
.wf-bar.step { background: #657084; }
.wf-bar.llm { background: var(--amber); }
.wf-bar.error { background: var(--red); }

.wf-bar:hover,
.wf-bar.selected {
  outline: 2px solid rgba(10, 100, 255, .45);
  outline-offset: 1px;
}

.tree-node {
  display: grid;
  grid-template-columns: 28px 1fr auto;
  gap: 9px;
  align-items: center;
  margin: 5px 0;
  padding: 8px;
  border: 1px solid transparent;
  border-radius: 12px;
  cursor: pointer;
}

.tree-node:hover,
.tree-node.selected {
  border-color: #c7dcff;
  background: var(--blue-soft);
}

.tree-node[data-depth="1"] {
  margin-left: 12px;
}

.tree-node[data-depth="2"] {
  margin-left: 28px;
}

.tree-node[data-depth="3"] {
  margin-left: 44px;
}

.node-glyph {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 9px;
  background: #eef1f6;
  color: #4b5565;
  font-size: 10px;
  font-weight: 750;
}

.node-title {
  min-width: 0;
}

.node-title strong,
.node-title span {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.node-title span,
.node-time {
  color: var(--muted);
  font-size: 12px;
}

.main-switcher {
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, .46);
}

.conversation-title {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 10px;
  color: #2c3038;
}

.conversation-title strong {
  overflow: hidden;
  max-width: 560px;
  font-size: 15px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.replay-pill {
  flex: 0 0 auto;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px 8px;
  background: #f5f6f8;
  color: #7b8495;
  font-size: 10px;
  font-weight: 750;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.crumb {
  flex: 0 0 auto;
  max-width: 300px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px 10px;
  background: #fff;
  color: #4c586c;
  font-size: 11px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.crumb:hover {
  border-color: #b7d5fb;
  background: var(--blue-soft);
  color: #2456b3;
}

.reveal-btn {
  flex: 0 0 auto;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px 10px;
  background: #fff;
  color: #4c586c;
  font-size: 11px;
  white-space: nowrap;
}

.reveal-btn:hover {
  border-color: #b7d5fb;
  background: var(--blue-soft);
  color: #2456b3;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 8px;
  padding: 12px 20px 0;
}

.metric {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 10px 11px;
  background: rgba(255, 255, 255, .78);
}

.metric strong,
.metric span {
  display: block;
}

.metric strong {
  font-family: var(--mono);
  font-size: 16px;
}

.metric span {
  margin-top: 3px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 650;
}

.view {
  display: none;
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: 24px 20px 18px;
}

.view.active {
  display: block;
}

.section-title {
  margin-bottom: 14px;
}

.event-controls {
  min-width: min(520px, 52%);
}

.event-controls.narrow {
  min-width: min(320px, 38%);
}

.conversation {
  display: grid;
  gap: 22px;
  width: min(920px, 100%);
  margin: 0 auto;
  padding-bottom: 18px;
}

.message {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  gap: 11px;
}

.avatar {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 11px;
  background: #eef1f6;
  color: #455064;
  font-weight: 760;
}

.message.tool .avatar {
  background: var(--green-soft);
  color: var(--green);
}

.message.assistant .avatar {
  background: var(--amber-soft);
  color: var(--amber);
}

.message-card {
  border: 0;
  border-radius: 0;
  padding: 0;
  background: transparent;
  box-shadow: none;
}

.message-card header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
  color: var(--muted);
}

.message-card header strong {
  color: var(--ink);
}

.message-card p {
  margin: 0;
  color: #2f3137;
  font-size: 15px;
  line-height: 1.64;
  white-space: pre-wrap;
}

.activity-list {
  display: grid;
  gap: 8px;
  margin: 2px 0 14px;
}

.chat-activity {
  width: 100%;
  max-width: 760px;
  color: #8d9199;
}

.chat-activity summary {
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr) 18px;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  list-style: none;
  font-size: 13px;
  line-height: 1.35;
}

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

.chat-activity summary::after {
  content: "⌄";
  color: #9a9ca1;
  text-align: right;
}

.chat-activity[open] summary::after {
  content: "⌃";
}

.chat-activity strong {
  overflow: hidden;
  color: #7d8189;
  font-family: var(--font);
  font-weight: 650;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.chat-activity p,
.chat-activity pre {
  margin: 7px 0 2px 88px;
  border-left: 2px solid #d8dde6;
  padding: 7px 10px;
  background: rgba(246, 247, 249, .86);
  color: #6a6d73;
  font-family: var(--font);
  font-size: 12px;
  line-height: 1.55;
  white-space: pre-wrap;
}

.chat-activity pre {
  font-family: var(--mono);
}

.muted-text {
  color: var(--muted);
}

.message.user {
  grid-template-columns: minmax(0, 1fr);
  justify-items: stretch;
}

.message.user .avatar,
.message.user header {
  display: none;
}

.message.selected .message-card {
  outline: 2px solid rgba(10, 100, 255, .22);
  outline-offset: 4px;
}

.message.assistant {
  grid-template-columns: minmax(0, 1fr);
}

.message.assistant .avatar,
.message.assistant header {
  display: none;
}

.trajectory {
  display: grid;
  gap: 9px;
  width: 100%;
  padding-bottom: 12px;
}

.trajectory-toolbar {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 0 0 14px;
  color: var(--muted);
}

.trajectory-toolbar span {
  font-weight: 650;
}

.traj-head-row {
  display: grid;
  grid-template-columns: 48px 150px minmax(0, 1fr) 58px 58px 58px 76px 18px;
  gap: 10px;
  padding: 4px 14px 8px;
  color: #9aa5b8;
  font-size: 10px;
  font-weight: 750;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.traj-head-row .num {
  text-align: right;
}

.traj-row {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, .88);
  box-shadow: var(--shadow-soft);
}

.traj-row.expanded.assistant {
  border-left: 4px solid #66c28c;
}

.traj-row.error {
  border-left: 4px solid var(--red);
}

.traj-row.selected {
  border-color: #b8cff8;
  box-shadow: 0 0 0 2px rgba(10, 100, 255, .14);
}

.traj-summary {
  width: 100%;
  display: grid;
  grid-template-columns: 48px 150px minmax(0, 1fr) 58px 58px 58px 76px 18px;
  gap: 10px;
  align-items: center;
  border: 0;
  border-radius: 0;
  padding: 10px 14px;
  background: transparent;
  color: #465268;
  text-align: left;
  cursor: pointer;
  user-select: none;
}

.traj-summary:hover {
  background: #f7f9fc;
}

.traj-content {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  overflow: hidden;
}

.traj-index,
.token-cell,
.chevron {
  color: #9aa5b8;
  font-family: var(--mono);
  font-weight: 650;
}

.token-cell {
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-size: 11px;
}

.token-cell.offset {
  color: #b3bcca;
}


.role-chip,
.tool-chip,
.result-chip,
.event-chip {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  width: fit-content;
  border-radius: 8px;
  padding: 4px 9px;
  font-weight: 760;
  letter-spacing: .06em;
  white-space: nowrap;
}

.role-chip.user {
  background: #eef2ff;
  color: #3151b7;
}

.role-chip.assistant,
.tool-chip {
  background: #dff8ec;
  color: #236d50;
}

.role-chip.tool,
.result-chip {
  background: #fff0c2;
  color: #87400c;
}

.event-chip {
  background: #f5f6f8;
  color: #7b8495;
  letter-spacing: 0;
  text-transform: none;
}

.role-chip.system {
  background: #edf2f7;
  color: #334155;
}

.role-chip.turn {
  background: #f1f5f9;
  color: #475569;
}

.role-chip.step {
  background: #eef6ff;
  color: #245b9e;
}

.role-chip.meta {
  background: #f5f6f8;
  color: #7b8495;
}

.result-chip.error {
  background: #fde8e6;
  color: var(--red);
}

.traj-title {
  overflow: hidden;
  color: #445168;
  font-size: 12px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.traj-body {
  margin: 0 14px 14px 116px;
  padding-top: 6px;
  color: #555;
}

.user-body {
  white-space: pre-wrap;
}

.thinking-card {
  margin-bottom: 14px;
  border-left: 4px solid #c084fc;
  border-radius: 12px;
  padding: 14px 16px;
  background: var(--purple-soft);
  color: #9860d8;
}

.thinking-card strong {
  display: block;
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: .04em;
}

.thinking-card p,
.assistant-text {
  margin: 0;
  line-height: 1.7;
  white-space: pre-wrap;
}

.assistant-text {
  margin-bottom: 14px;
  color: #5c5c60;
}

.tool-call-card,
.tool-output-card {
  overflow: hidden;
  margin: 12px 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
}

.tool-call-head,
.tool-output-head {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 12px;
  background: #7d8694;
  color: #eff6ff;
}

.tool-call-head span,
.tool-output-head span {
  overflow: hidden;
  color: #cad2df;
  font-family: var(--mono);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tool-call-card pre,
.tool-output-card pre,
.metadata-line pre {
  margin: 0;
  max-height: 360px;
  padding: 12px 14px;
  overflow: auto;
  background: var(--code-bg);
  color: #666;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.48;
  white-space: pre-wrap;
}

.metadata-line {
  margin-top: 8px;
  color: var(--muted-2);
}

.tool-call-card.error,
.tool-output-card.error {
  border-color: #f3c2bd;
}

.tool-call-card.error .tool-call-head,
.tool-output-card.error .tool-output-head {
  background: #b2453d;
}

.error-text {
  color: var(--red) !important;
  background: #fdf3f2 !important;
}

.more-note {
  padding: 8px 14px;
  border-top: 1px dashed var(--line);
  background: var(--code-bg);
  color: #9aa5b8;
  font-size: 11px;
}

.spawn-list {
  margin: 12px 0;
  border: 1px solid #d9e6d9;
  border-radius: 12px;
  background: #f7fbf7;
  overflow: hidden;
  /* Inside .activity-body (white-space: pre-wrap) the template's own
     newlines must not render. */
  white-space: normal;
}

.spawn-list-head {
  padding: 8px 12px;
  border-bottom: 1px solid #e3eee3;
  color: #3d7a52;
  font-size: 11px;
  font-weight: 750;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.spawn-link {
  width: 100%;
  display: grid;
  grid-template-columns: 16px minmax(0, 1fr) auto;
  gap: 8px;
  align-items: center;
  border: 0;
  border-radius: 0;
  border-bottom: 1px solid #edf4ed;
  padding: 8px 12px;
  background: transparent;
  text-align: left;
}

.spawn-link:last-child {
  border-bottom: 0;
}

.spawn-link:hover {
  background: #ecf6ec;
}

.spawn-mark {
  color: #6aa981;
  font-family: var(--mono);
}

.spawn-title {
  overflow: hidden;
  color: #2f4a3a;
  font-size: 12px;
  font-weight: 600;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.spawn-meta {
  color: #86a292;
  font-family: var(--mono);
  font-size: 10.5px;
  white-space: nowrap;
}

.event-table {
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
}

.event-row {
  width: 100%;
  display: grid;
  grid-template-columns: 72px 178px 90px minmax(320px, 1fr);
  gap: 12px;
  align-items: center;
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  padding: 10px 12px;
  background: #fff;
  color: var(--ink);
  text-align: left;
}

.event-row:last-child {
  border-bottom: 0;
}

.event-row:not(.event-head):hover,
.event-row.selected {
  background: var(--blue-soft);
}

.event-head {
  position: sticky;
  top: 0;
  z-index: 1;
  background: #f6f7f9;
  color: var(--muted);
  font-size: 11px;
  font-weight: 750;
  text-transform: uppercase;
}

.event-row .seq {
  font-family: var(--mono);
  color: var(--muted);
}

.agent-overview {
  display: grid;
  grid-template-columns: minmax(340px, .92fr) minmax(420px, 1.08fr);
  gap: 14px;
}

.agent-card,
.tool-card {
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 16px;
  background: rgba(255, 255, 255, .86);
  box-shadow: var(--shadow-soft);
}

.agent-card p,
.tool-card p {
  color: var(--muted);
}

.agent-card pre,
.tool-card pre {
  max-height: 420px;
  overflow: auto;
  margin: 12px 0 0;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: var(--code-bg);
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.55;
  white-space: pre-wrap;
}

.tool-list {
  display: grid;
  gap: 9px;
}

.tool-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 13px;
  padding: 10px 12px;
  background: #fff;
  cursor: pointer;
}

.tool-row:hover {
  border-color: #b7d5fb;
  background: var(--blue-soft);
}

.tool-row span {
  border-radius: 999px;
  padding: 4px 8px;
  background: #eef2f7;
  color: var(--muted);
  font-family: var(--mono);
}

.composer {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) auto 72px;
  gap: 9px;
  align-items: end;
  width: calc(100% - 40px);
  margin: 0 auto 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 10px;
  background: rgba(255, 255, 255, .90);
  box-shadow: var(--shadow-soft);
}

.composer textarea {
  min-height: 38px;
  max-height: 120px;
  border: 0;
  background: transparent;
  box-shadow: none;
}

.composer-plus,
.send-button {
  height: 34px;
  border-radius: 11px;
}

.composer-meta {
  align-self: center;
  color: var(--muted-2);
  font-size: 12px;
  white-space: nowrap;
}

.send-button {
  border-color: var(--blue);
  background: var(--blue);
  color: #fff;
  font-weight: 700;
}

.composer.disabled {
  background: #fafbfc;
  border-style: dashed;
}

.composer.disabled textarea,
.composer.disabled .composer-plus,
.composer.disabled .send-button {
  opacity: .55;
  cursor: not-allowed;
}

.composer.disabled .send-button {
  border-color: var(--line-strong);
  background: #d6dbe4;
}

.details-head {
  align-items: flex-start;
  margin-bottom: 22px;
}

.drawer-actions {
  display: flex;
  flex: 0 0 auto;
  gap: 8px;
}

#inspectorClose {
  background: #f7f8fa;
  color: #5f6675;
}

.details-head h2 {
  overflow: hidden;
  max-width: 220px;
  font-size: 20px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.detail-object {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 12px;
}

.detail-icon {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  border-radius: 10px;
  background: var(--blue);
  color: #fff;
  font-size: 11px;
  font-weight: 750;
}

#detailSubtitle {
  overflow: hidden;
  max-width: 260px;
  margin: 4px 0 0;
  color: var(--muted);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.detail-tabs {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  padding-bottom: 22px;
  border-bottom: 0;
}

.detail-tabs button {
  border: 0;
  border-radius: 8px;
  padding: 8px 9px;
  background: transparent;
  color: #657089;
  font-size: 14px;
  white-space: nowrap;
}

.detail-tabs button.active {
  background: #eef2f8;
  color: var(--ink);
  box-shadow: none;
}

.panel-section {
  display: grid;
  gap: 20px;
}

.feedback-button {
  width: fit-content;
  border-style: dashed;
  padding: 10px 16px;
  color: #35445d;
  font-size: 16px;
}

.feedback-form {
  display: grid;
  gap: 10px;
}

.feedback-compose-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px;
  background: #fff;
}

.feedback-author {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  color: #74819a;
  font-weight: 600;
}

.feedback-author input {
  border: 0;
  border-radius: 0;
  padding: 3px 0;
  background: transparent;
  color: #111827;
  font-weight: 600;
}

.feedback-history {
  margin-top: 18px;
}

.feedback-history header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
  color: #2f3645;
}

.feedback-history header span {
  color: #98a1b2;
  font-size: 11px;
}

.feedback-list {
  display: grid;
  gap: 8px;
}

.feedback-empty {
  border: 1px dashed var(--line);
  border-radius: 10px;
  padding: 10px;
  color: #9aa5b8;
  background: #fafbfc;
  font-size: 12px;
}

.feedback-item {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px;
  background: #fff;
}

.feedback-item header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: #7c879a;
  font-size: 12px;
}

.feedback-item p {
  margin: 8px 0 0;
  color: #242832;
  line-height: 1.5;
  white-space: pre-wrap;
}

.feedback-form textarea {
  min-height: 118px;
  border-radius: 10px;
  background: #fbfcfe;
  line-height: 1.5;
}

.feedback-submit {
  justify-self: end;
  border-color: var(--blue);
  background: var(--blue);
  color: #fff;
  font-weight: 700;
}

/* Linear-inspired density pass */
:root {
  --shadow: none;
  --shadow-soft: none;
}

body {
  font-size: 12px;
}

.shell {
  padding: 10px;
}

.left-pane,
.main-pane {
  border-color: #e4e7ee;
  box-shadow: none;
}

.left-pane,
.main-pane,
.session-search-card,
.control-card {
  border-radius: 14px;
}

.left-pane {
  padding: 12px;
  background: #f7f8fb;
}

.main-pane {
  background: #fff;
}

h1 {
  font-size: 16px;
}

h2 {
  font-size: 18px;
}

h3 {
  font-size: 14px;
}

.new-session-button,
.session-search-card,
.session-row {
  box-shadow: none;
}

.new-session-button {
  padding: 8px 10px;
}

.session-search-card {
  padding: 10px;
}

.session-row {
  border-radius: 10px;
  padding: 8px;
}

.main-switcher {
  padding: 10px 14px;
}

.conversation-title strong {
  font-size: 13px;
}

.segmented.large {
  flex-wrap: nowrap;
  padding: 3px;
}

.segmented.large button {
  padding: 6px 10px;
  white-space: nowrap;
}

.view {
  padding: 18px 20px;
}

.conversation {
  width: min(860px, 100%);
  gap: 18px;
}

.message-card p {
  font-size: 13px;
}

/* Codex-like conversation surface */
.conversation {
  width: 100%;
  max-width: 980px;
  gap: 20px;
  padding: 2px 0 58px;
}

.message {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

/* The whole message row opens the inspector — make that visible: pointer
   cursor + a faint tint on hover (negative margin keeps layout unchanged). */
#conversation .message {
  cursor: pointer;
  border-radius: 12px;
  margin: -6px -12px;
  padding: 6px 12px;
  transition: background 120ms ease;
}

#conversation .message:hover {
  background: #f6f8fb;
}

.message-card {
  min-width: 0;
}

.message.user {
  justify-items: stretch;
}

.message.user .message-card {
  width: 100%;
  max-width: none;
}

.message.assistant {
  justify-items: stretch;
}

.message.selected .message-card {
  outline: none;
}

.user-bubble {
  width: fit-content;
  margin-left: auto;
  max-width: min(650px, 76%);
  border-radius: 18px;
  padding: 13px 16px;
  background: #f0f1f3;
  color: #272a31;
  font-size: 13px;
  line-height: 1.62;
  white-space: pre-wrap;
}

.assistant-prose {
  color: #24272f;
  font-size: 13px;
  line-height: 1.68;
}

.assistant-prose p {
  margin: 0 0 9px;
  font-size: 13px;
  line-height: 1.68;
  white-space: pre-wrap;
}

.assistant-prose .md-h {
  margin: 16px 0 8px;
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: -.01em;
}

.assistant-prose h3.md-h {
  font-size: 15px;
}

.assistant-prose ul,
.assistant-prose ol {
  margin: 4px 0 10px;
  padding-left: 22px;
}

.assistant-prose li {
  margin: 3px 0;
  line-height: 1.6;
}

.assistant-prose hr {
  margin: 14px 0;
  border: 0;
  border-top: 1px solid var(--line);
}

.assistant-prose code {
  border-radius: 4px;
  padding: 1px 5px;
  background: #f0f1f4;
  color: #45516a;
  font-family: var(--mono);
  font-size: 11.5px;
}

.assistant-prose .md-code {
  margin: 6px 0 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
  overflow: auto;
  background: var(--code-bg);
  color: #3c4453;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.55;
  white-space: pre;
}

.assistant-prose .md-code code {
  padding: 0;
  background: transparent;
}

.assistant-prose a {
  color: var(--blue);
  text-decoration: none;
}

.assistant-prose a:hover {
  text-decoration: underline;
}

.assistant-prose .md-table-wrap {
  overflow-x: auto;
  margin: 8px 0 12px;
}

.assistant-prose .md-table {
  border-collapse: collapse;
  font-size: 12.5px;
}

.assistant-prose .md-table th,
.assistant-prose .md-table td {
  border: 1px solid var(--line);
  padding: 6px 10px;
  text-align: left;
  vertical-align: top;
  line-height: 1.5;
}

.assistant-prose .md-table th {
  background: #f6f7f9;
  font-weight: 650;
  white-space: nowrap;
}

.assistant-prose .md-table tr:nth-child(even) td {
  background: #fafbfc;
}

.assistant-prose blockquote {
  margin: 6px 0 10px;
  border-left: 3px solid var(--line-strong);
  padding: 4px 12px;
  color: #5f6571;
}

.activity-list {
  display: grid;
  gap: 7px;
  margin: 0 0 16px;
}

.chat-activity {
  max-width: 100%;
  color: #858b98;
}

.chat-activity summary {
  display: grid;
  grid-template-columns: 80px minmax(0, 1fr) 18px;
  align-items: center;
  gap: 8px;
  min-height: 24px;
  border-radius: 7px;
  padding: 2px 0;
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.activity-open-inspector {
  display: inline-block;
  margin-top: 6px;
  border: 0;
  border-radius: 0;
  padding: 2px 0;
  background: transparent;
  color: var(--blue);
  font-size: 12px;
  cursor: pointer;
}

.activity-open-inspector:hover {
  background: transparent;
  border: 0;
  text-decoration: underline;
}

.chat-activity summary:hover {
  background: #f7f8fa;
}

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

.chat-activity summary::after {
  content: "⌄";
  color: #a0a6b2;
  text-align: center;
}

.chat-activity[open] summary::after {
  content: "⌃";
}

.chat-activity summary span {
  color: #8e95a3;
  font-size: 13px;
}

.chat-activity summary strong {
  overflow: hidden;
  color: #747b88;
  font-size: 13px;
  font-weight: 650;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.activity-preview {
  color: #a6acb8;
  font-weight: 450;
}

.chat-activity.failed summary span {
  color: var(--red);
  font-weight: 700;
}

.chat-activity.failed .activity-body {
  border-left-color: #eab8b3;
  background: #fdf7f6;
}

.activity-body {
  margin: 7px 0 4px 80px;
  border-left: 2px solid #dde2ea;
  padding: 8px 12px;
  background: #fafbfc;
  color: #5f6571;
  font-size: 12px;
  line-height: 1.58;
  white-space: pre-wrap;
}

.activity-body pre {
  max-height: 320px;
  margin: 4px 0 10px;
  overflow: auto;
  color: #4f5663;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.5;
  white-space: pre-wrap;
}

.activity-section-title {
  margin: 4px 0 5px;
  color: #9aa2b1;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.detail-panel {
  display: none;
  min-height: 0;
  overflow: auto;
  padding-top: 14px;
}

.detail-panel.active {
  display: block;
}

.detail-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 14px;
}

.detail-metrics div {
  border: 1px solid var(--line);
  border-radius: 13px;
  padding: 10px;
  background: #fff;
}

.detail-metrics strong,
.detail-metrics span {
  display: block;
}

.detail-metrics strong {
  font-family: var(--mono);
}

.detail-metrics span {
  color: var(--muted);
  font-size: 11px;
}

.prose {
  line-height: 1.65;
}

.prose p {
  margin: 0 0 12px;
}

.format-row {
  margin-bottom: 10px;
}

.format-row select {
  width: 128px;
}

.code-block {
  margin: 0;
  min-height: 260px;
  max-height: 58vh;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 15px;
  padding: 14px;
  background: var(--code-bg);
  color: var(--code-ink);
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.62;
  white-space: pre-wrap;
}

.code-block.tall {
  min-height: 520px;
}

.toast {
  position: fixed;
  right: 22px;
  bottom: 22px;
  transform: translateY(18px);
  opacity: 0;
  pointer-events: none;
  border-radius: 999px;
  padding: 10px 14px;
  background: rgba(29, 29, 31, .94);
  color: #fff;
  transition: opacity 200ms var(--ease-out), transform 200ms var(--ease-out);
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

.empty-state,
.error-state {
  border: 1px dashed var(--line);
  border-radius: 16px;
  padding: 16px;
  color: var(--muted);
  background: rgba(255, 255, 255, .72);
}

/* Trajectory structure tree: turns are collapsible parents, steps branch off
   them behind a guide line. Collapse every turn to see just the turn list. */
.tree-turn {
  margin-bottom: 8px;
}

.tree-turn-head {
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 6px;
  padding: 5px 8px 5px 6px;
  border-radius: 8px;
  color: #4c586c;
  font-size: 11px;
  font-weight: 750;
  letter-spacing: .06em;
  text-transform: uppercase;
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.tree-turn-head::-webkit-details-marker {
  display: none;
}

.tree-turn-head::before {
  content: '▸';
  color: #9aa5b8;
  font-size: 9px;
  transition: transform .12s ease;
}

.tree-turn[open] > .tree-turn-head::before {
  transform: rotate(90deg);
}

.tree-turn-head:hover {
  background: #eef1f6;
}

.tree-turn-head.active .tt-label {
  color: #2456b3;
}

.tree-turn-head .tt-label {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.tree-turn-head .t-dur {
  color: #9aa5b8;
  font-family: var(--mono);
  font-weight: 650;
  letter-spacing: 0;
  text-transform: none;
}

.tree-steps {
  display: grid;
  gap: 1px;
  margin: 2px 0 0 11px;
  border-left: 1px solid var(--line);
  padding-left: 6px;
}

.tree-step {
  width: 100%;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 2px 8px;
  align-items: baseline;
  border: 0;
  border-radius: 8px;
  padding: 5px 8px;
  background: transparent;
  text-align: left;
  cursor: pointer;
}

.tree-step:hover,
.tree-step.active {
  background: var(--blue-soft);
}

.tree-step .t-name {
  color: #3a4356;
  font-size: 12px;
  font-weight: 650;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tree-step.error .t-name::after {
  content: '●';
  margin-left: 6px;
  color: var(--red);
  font-size: 8px;
  vertical-align: 2px;
}

.tree-step .t-dur {
  color: #9aa5b8;
  font-family: var(--mono);
  font-size: 10.5px;
  font-variant-numeric: tabular-nums;
}

.tree-step .t-sub {
  grid-column: 1 / -1;
  color: #8e95a3;
  font-size: 11px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Step group headers inside the trajectory table */
.traj-group-head {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-top: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #f4f6fa;
  color: #4c586c;
  font-size: 11px;
  font-weight: 750;
}

.traj-group-head.error {
  border-left: 3px solid var(--red);
}

.traj-group-head .g-dur {
  color: #9aa5b8;
  font-family: var(--mono);
  font-weight: 650;
  font-variant-numeric: tabular-nums;
}

.traj-group-head .g-meta {
  color: #8e95a3;
  font-weight: 550;
}

@keyframes traj-flash {
  0% { box-shadow: 0 0 0 3px rgba(10, 100, 255, .55); }
  100% { box-shadow: 0 0 0 3px rgba(10, 100, 255, 0); }
}

.flash {
  animation: traj-flash 1.4s ease-out;
}

/* One-shot enter for disclosed content; collapse stays instant. */
@keyframes content-enter {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.traj-body,
.chat-activity[open] .activity-body,
.tree-turn[open] .tree-steps {
  animation: content-enter 160ms var(--ease-out);
}

/* Inline row tools + annotation (Trajectory is self-contained: copy, raw event
   and annotations live in the expanded row, no inspector needed) */
.row-tools {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 10px 0 2px;
}

.row-tools button {
  border-color: transparent;
  border-radius: 7px;
  padding: 4px 10px;
  background: #f4f5f8;
  color: #5f6675;
  font-size: 11px;
}

.row-tools button:hover {
  border-color: var(--line-strong);
  background: #eef0f4;
}

.fb-chip {
  color: #8b5cf6;
  font-family: var(--mono);
  font-size: 10.5px;
}

.inline-fb {
  display: grid;
  gap: 8px;
  margin: 10px 0;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px;
  background: #fff;
}

.inline-fb textarea {
  min-height: 60px;
  border-radius: 8px;
  background: #fbfcfe;
}

.inline-fb .inline-fb-row {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr) auto;
  gap: 8px;
  align-items: center;
}

.inline-fb .inline-fb-row input {
  padding: 6px 9px;
}

.inline-fb .fb-hint {
  color: #9aa5b8;
  font-size: 11px;
}

.inline-fb .fb-send {
  border-color: var(--blue);
  background: var(--blue);
  color: #fff;
  font-weight: 650;
}

.inline-fb-list {
  display: grid;
  gap: 6px;
  margin: 8px 0 2px;
}

/* Waterfall summary strip: where did time go, what failed, what was slowest */
.wf-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.wf-stat {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px 12px;
  background: #fff;
}

.wf-stat strong {
  display: block;
  font-family: var(--mono);
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

.wf-stat span {
  color: var(--muted);
  font-size: 10px;
  font-weight: 750;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.wf-stat.error strong {
  color: var(--red);
}

.wf-stat.link {
  cursor: pointer;
}

.wf-stat.link:hover {
  border-color: #b7d5fb;
  background: var(--blue-soft);
}

/* Opacity-only variant of inspector-enter for reduced motion. */
@keyframes inspector-enter-fade {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Reduced motion: drop position/scale changes, keep opacity feedback —
   fewer and gentler animations, not zero. */
@media (prefers-reduced-motion: reduce) {
  .toast {
    transform: none;
    transition: opacity 200ms var(--ease-out);
  }

  .chat-split.inspector-open .inspector,
  .wf-split.inspector-open .inspector {
    animation: inspector-enter-fade 200ms var(--ease-out);
  }

  .traj-body,
  .chat-activity[open] .activity-body,
  .tree-turn[open] .tree-steps {
    animation: none;
  }

  .segmented button:active,
  .trajectory-toolbar button:active,
  .drawer-actions button:active,
  .row-tools button:active,
  .fb-send:active,
  .feedback-submit:active,
  .new-session-button:active,
  .activity-open-inspector:active {
    transform: none;
  }

  /* The jump-target indicator is comprehension, not decoration: keep a static
     ring, just stop the pulse. */
  .flash {
    animation: none;
    box-shadow: 0 0 0 3px rgba(10, 100, 255, .45);
  }
}

@media (max-width: 900px) {
  body {
    overflow: auto;
  }

  .shell {
    display: block;
    height: auto;
    padding: 10px;
  }

  .pane-divider {
    display: none !important;
  }

  .left-pane,
  .main-pane {
    margin-bottom: 12px;
    min-height: 520px;
  }

  /* On small screens the inspector falls back to a full-screen overlay
     and the trajectory tree hides. */
  .chat-split.inspector-open,
  .wf-split.inspector-open {
    grid-template-columns: minmax(0, 1fr);
  }

  .chat-split.inspector-open .inspector,
  .wf-split.inspector-open .inspector {
    position: fixed;
    inset: 8px;
    z-index: 40;
    border-radius: 14px;
    border: 1px solid var(--line);
    box-shadow: 0 18px 48px rgba(15, 23, 42, .2);
  }

  .traj-split {
    grid-template-columns: minmax(0, 1fr);
  }

  .traj-tree {
    display: none;
  }

  .topbar,
  .section-title,
  .details-head,
  .event-controls,
  .top-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .metrics,
  .agent-overview,
  .detail-metrics,
  .composer {
    grid-template-columns: 1fr;
  }

  .traj-head-row {
    display: none;
  }

  .traj-summary {
    grid-template-columns: 48px minmax(0, 1fr) 18px;
    row-gap: 6px;
  }

  .traj-summary .token-cell {
    display: none;
  }

  .traj-summary .traj-content {
    grid-column: 1 / -1;
  }

  .traj-summary .chevron {
    grid-row: 1;
    grid-column: 3;
  }

  .event-row {
    grid-template-columns: 58px 1fr;
  }

  .event-row span:nth-child(n+3) {
    grid-column: 1 / -1;
  }

  .wf-row {
    grid-template-columns: 170px minmax(0, 1fr);
  }

  .traj-body {
    margin-left: 14px;
  }
}