:root {
  color-scheme: light;
  --canvas: #f6f6f8;
  --surface: #ffffff;
  --surface-subtle: #f0f1f4;
  --ink: #181b25;
  --ink-soft: #454c5d;
  --ink-muted: #656d80;
  --line: #d8dbe2;
  --line-strong: #b8beca;
  --action: #2853c5;
  --action-hover: #1f45a9;
  --action-ink: #ffffff;
  --saved: #17694f;
  --saved-bg: #e9f6ef;
  --uncertain: #8a5a00;
  --uncertain-bg: #fff4d8;
  --danger: #a72b25;
  --danger-bg: #fcebea;
  --radius-sm: 0.45rem;
  --radius-md: 0.7rem;
  --radius-lg: 0.9rem;
  --shadow: 0 1px 2px rgba(24, 27, 37, 0.05), 0 6px 18px rgba(24, 27, 37, 0.04);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background: var(--canvas);
  color: var(--ink);
  font-family: "Segoe UI Variable Text", "Aptos", "Segoe UI", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

body { min-height: 100vh; }

.app {
  max-width: 60rem;
  margin: 0 auto;
  padding: 1.5rem 1.5rem 4rem;
}

h1, h2, h3 { color: var(--ink); text-wrap: balance; }
h1 { margin: 0 0 0.35rem; font-size: 1.75rem; line-height: 1.2; letter-spacing: -0.02em; }
h1[tabindex="-1"]:focus { outline: none; }
h2 { margin: 0 0 0.6rem; font-size: 1.08rem; line-height: 1.35; }
h3 { margin: 1rem 0 0.5rem; font-size: 1rem; line-height: 1.35; }
p { max-width: 72ch; margin: 0 0 0.85rem; color: var(--ink-soft); text-wrap: pretty; }
.lead { max-width: 68ch; font-size: 1.08rem; color: var(--ink); }
.muted { color: var(--ink-muted); font-size: 0.95rem; }

.skip-link {
  position: fixed;
  inset: 0.5rem auto auto 0.5rem;
  z-index: 10;
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-sm);
  background: var(--ink);
  color: white;
  transform: translateY(-200%);
}
.skip-link:focus { transform: translateY(0); }

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip-path: inset(50%) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.brand {
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  text-decoration: none;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.65rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--line);
}

.nav { display: flex; gap: 0.25rem; }
.nav a {
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.7rem;
  border-radius: var(--radius-sm);
  color: var(--ink-soft);
  font-size: 0.92rem;
  text-decoration: none;
}
.nav a:hover { background: var(--surface-subtle); color: var(--ink); }
.nav a[aria-current="page"] { background: #e9edfb; color: var(--action); font-weight: 700; }

.screen-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}
.access-date { margin: 0 0 0.4rem; color: var(--ink-muted); font-size: 0.9rem; white-space: nowrap; }

.card,
.result-panel,
.empty-state,
.screen-error {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}
.login-card { max-width: 36rem; }

.btn {
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  padding: 0.55rem 1rem;
  background: var(--surface);
  color: var(--ink);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: background-color 160ms ease-out, border-color 160ms ease-out, color 160ms ease-out;
}
.btn:hover { border-color: #8992a4; background: var(--surface-subtle); }
.btn.primary { border-color: var(--action); background: var(--action); color: var(--action-ink); }
.btn.primary:hover { border-color: var(--action-hover); background: var(--action-hover); }
.btn.danger { border-color: var(--danger); background: var(--danger-bg); color: var(--danger); }
.btn:disabled { opacity: 0.58; cursor: wait; }
.nav-logout { margin-left: 0.35rem; }
.btn.block { width: 100%; }

:where(a, button, input, textarea, select, summary):focus-visible {
  outline: 3px solid var(--action);
  outline-offset: 3px;
}

input[type="text"], textarea, select {
  width: 100%;
  min-height: 3rem;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--ink);
  font: inherit;
}
textarea { min-height: 6rem; resize: vertical; }
input:user-invalid { border-color: var(--danger); background: var(--danger-bg); }

.field { margin-bottom: 1rem; }
.field:last-child { margin-bottom: 0; }
.field label { display: block; margin-bottom: 0.35rem; color: var(--ink); font-size: 0.92rem; font-weight: 700; }
.hint, .part-guidance { margin: 0 0 0.45rem; color: var(--ink-muted); font-size: 0.9rem; }

.section-progress { margin-bottom: 0.5rem; color: var(--ink-muted); font-size: 0.9rem; font-weight: 700; }
.exercise-nav, .canvas-part-nav { display: flex; flex-wrap: wrap; gap: 0.45rem; margin: 0.75rem 0; }
.exercise-nav { border-bottom: 1px solid var(--line); padding-bottom: 0.6rem; }
.exercise-nav button, .canvas-part-nav button { border: 1px solid var(--line); border-radius: 999px; padding: 0.45rem 0.7rem; background: var(--surface); color: var(--ink-soft); cursor: pointer; }
.exercise-nav button.active, .canvas-part-nav button.active { border-color: var(--action); background: #e9edfb; color: var(--action); font-weight: 700; }
.exercise-nav button:disabled { opacity: 0.5; cursor: not-allowed; }
.stale-instructions { margin: 1rem 0; padding: 0.85rem 1rem; border: 1px solid #e7cf92; border-radius: var(--radius-sm); background: var(--uncertain-bg); color: #704900; }
.stale-instructions p { margin: 0.25rem 0 0.7rem; }
.canvas-part { min-height: 25rem; padding-bottom: 5rem; }
.canvas-part { border-left: 0.35rem solid var(--action); }
.section-progress { color: var(--ink-muted); font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; }
.part-guidance { max-width: 58rem; color: var(--ink-soft); }
.canvas-part legend { padding: 0 0.3rem; color: var(--ink); font-size: 1.1rem; font-weight: 750; }

.actions { display: flex; flex-wrap: wrap; gap: 0.65rem; margin-top: 1rem; }
.actions-between {
  position: sticky;
  bottom: 0;
  z-index: 2;
  justify-content: space-between;
  padding: 0.75rem 0;
  border-top: 1px solid var(--line);
  background: var(--canvas);
}

.status { min-height: 1.4rem; margin-top: 0.55rem; color: var(--ink-muted); font-size: 0.9rem; }

.list { margin: 0; padding: 0; list-style: none; }
.activity-list { display: flex; flex-direction: column; gap: 0.6rem; }
.activity-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.9rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
}
.activity-row.current { border-color: #8ea5e2; box-shadow: 0 0 0 1px #c4d0f1; }
.activity-index {
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--surface-subtle);
  color: var(--ink-muted);
  font-weight: 700;
}
.activity-title { display: flex; flex-wrap: wrap; align-items: center; gap: 0.55rem; }
.activity-copy p { margin: 0.15rem 0 0; }
.done, .up-next {
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  font-size: 0.76rem;
  font-weight: 700;
}
.done { background: var(--saved-bg); color: var(--saved); }
.up-next { background: #e9edfb; color: var(--action); }

.pair { display: grid; grid-template-columns: 1fr 1fr; align-items: start; gap: 0.85rem; }
.pair .col { min-width: 0; border: 1px solid var(--line); border-radius: var(--radius-md); padding: 1rem; background: var(--surface); }
.comparison-output { margin: 1.25rem 0; }
.output-scroll { max-height: 31rem; overflow: auto; scrollbar-gutter: stable; }
.pair-prompt-form { margin-top: 1rem; }
.prompt-config-grid { margin-bottom: 1rem; }
.participant-context { margin-bottom: 1rem; }
.participant-context .section-heading { margin-bottom: 0.75rem; }
.participant-context .actions { margin-bottom: 0.75rem; }
.participant-context .status { margin: 0.75rem 0 0; }
[hidden] { display: none !important; }
.materials-teaser { margin-top: 1rem; }
.materials-grid { display: grid; grid-template-columns: minmax(0, 32rem); gap: 1rem; }
.material-card { padding: 1.25rem; }
.material-card h2 { margin: 0.35rem 0; }
.material-card p { max-width: 52ch; }
.prompt-side { min-width: 0; margin: 0; padding: 1rem; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); }
.prompt-side legend { padding-inline: 0.3rem; font-weight: 750; }
.pair-chat-grid { margin-top: 1rem; }

.rendered-output {
  background: var(--surface-subtle);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 1rem;
  color: var(--ink);
  font-size: 0.95rem;
}
.rendered-output p { margin: 0 0 0.75rem; color: var(--ink); }
.rendered-output p:last-child { margin-bottom: 0; }
.rendered-output h3 { margin-top: 0.85rem; }
.rendered-output ul, .rendered-output ol { margin: 0.4rem 0 0.85rem; padding-left: 1.4rem; }
.rendered-output li { margin-bottom: 0.4rem; }
.rendered-output hr { border: 0; border-top: 1px solid var(--line); margin: 1rem 0; }
.rendered-output table, .chat-message table { width: 100%; border-collapse: collapse; margin: 0.75rem 0; font-size: 0.92rem; }
.rendered-output th, .rendered-output td, .chat-message th, .chat-message td { border: 1px solid var(--line); padding: 0.45rem 0.55rem; text-align: left; vertical-align: top; }
.rendered-output th, .chat-message th { background: var(--surface-subtle); color: var(--ink); font-weight: 750; }

.prompt-review { margin: 1rem 0; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); }
.prompt-review summary { padding: 0.85rem 1rem; cursor: pointer; font-weight: 700; }
.prompt-review .rendered-output { margin: 0 1rem 1rem; max-height: 25rem; overflow: auto; }
.instruction-provenance { margin-top: 1rem; padding: 1rem; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--surface); }
.instruction-provenance .prompt-review { margin-bottom: 0; }
.prompt-chooser, .session-workspace { margin-top: 1rem; padding: 1rem; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--surface); }
.wide-workspace .session-workspace,
.wide-workspace .pair-prompt-form,
.wide-workspace .pair-chat-grid,
.wide-workspace .grounding-comparison {
  position: relative;
  left: 50%;
  width: min(80vw, 90rem);
  transform: translateX(-50%);
}
.section-heading { display: flex; justify-content: space-between; gap: 1rem; }
.section-heading p { margin-bottom: 0; }
.style-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.55rem; margin: 1rem 0; }
.style-option { min-height: 5.5rem; padding: 0.75rem; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); color: var(--ink); text-align: left; cursor: pointer; }
.style-option:hover { border-color: var(--line-strong); background: var(--surface-subtle); }
.style-option.selected { border-color: var(--action); box-shadow: 0 0 0 1px var(--action); }
.style-option strong, .style-option span { display: block; }
.style-option span { margin-top: 0.25rem; color: var(--ink-muted); font-size: 0.86rem; }
.prompt-editor { margin-top: 1rem; }
.session-rail { display: flex; gap: 0.4rem; overflow-x: auto; padding: 0.75rem 0; }
.session-rail button { flex: 0 0 auto; padding: 0.4rem 0.7rem; border: 1px solid var(--line); border-radius: 999px; background: var(--surface); color: var(--ink-soft); cursor: pointer; }
.session-rail button.active { border-color: var(--action); background: #e9edfb; color: var(--action); font-weight: 700; }
.empty-session { margin: 0.8rem 0; padding: 0.8rem; border-radius: var(--radius-sm); background: var(--surface-subtle); color: var(--ink-muted); }
.pane-selectors { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
.chat-grid { display: grid; grid-template-columns: 1fr 1fr; align-items: start; gap: 0.75rem; }
.chat-pane { min-width: 0; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--canvas); overflow: hidden; }
.chat-pane > header { padding: 0.75rem; border-bottom: 1px solid var(--line); background: var(--surface); }
.chat-pane > header span { color: var(--ink-muted); font-size: 0.78rem; font-weight: 700; }
.chat-pane > header h3 { margin: 0.15rem 0 0; }
.chat-transcript { height: 30rem; overflow-y: auto; padding: 0.75rem; }
.chat-message { margin-bottom: 0.65rem; padding: 0.7rem; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface); }
.chat-message.user { margin-left: 1rem; background: #edf1fc; }
.chat-message.assistant { margin-right: 1rem; }
.chat-message.streaming:empty { display: none; }
.chat-message.streaming.pending { display: none; }
.chat-message > strong { display: block; margin-bottom: 0.35rem; font-size: 0.82rem; }
.chat-message .rendered-output, .chat-message p { background: transparent; border: 0; padding: 0; }
.prompt-side .btn { margin-top: 0.5rem; }
.chat-pane form { padding: 0.75rem; border-top: 1px solid var(--line); background: var(--surface); }
.chat-pane form label { display: block; margin-bottom: 0.35rem; font-size: 0.88rem; font-weight: 700; }
.chat-pane form textarea { min-height: 4rem; }
.chat-pane.empty { min-height: 12rem; padding: 1rem; }
.onet-panel, .grounded-prompt { margin-top: 1rem; padding: 1rem; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--surface); }
.inline-form > div { display: flex; gap: 0.5rem; }
.inline-form input { flex: 1; }
.onet-results { display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; margin: 0.75rem 0; padding: 0; list-style: none; }
.onet-results button { width: 100%; padding: 0.75rem; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface); color: var(--ink); text-align: left; cursor: pointer; }
.onet-results button:hover { border-color: var(--action); }
.onet-results button.confirmed { border-color: var(--action); background: #edf1fc; }
.onet-results strong, .onet-results span { display: block; }
.onet-results span { margin-top: 0.2rem; color: var(--ink-muted); font-size: 0.84rem; }
.onet-profile { margin-top: 1rem; padding: 1rem; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface-subtle); }
.onet-summary { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
.onet-summary ul { margin: 0; padding-left: 1.2rem; }
.onet-summary li { margin-bottom: 0.3rem; font-size: 0.9rem; }
.source-note, .decision {
  margin: 1rem 0;
  padding: 0.85rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-subtle);
  color: var(--ink-soft);
}
.decision { background: var(--uncertain-bg); border-color: #e7cf92; color: #704900; }
.grounding-controls { margin-top: 1rem; padding: 1rem; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--surface); }
.source-toggles { display: flex; flex-wrap: wrap; gap: 0.6rem; margin: 1rem 0; }
.source-toggles label, .resource-options label { display: flex; align-items: center; gap: 0.4rem; }
.source-toggles label { padding: 0.55rem 0.7rem; border: 1px solid var(--line); border-radius: var(--radius-sm); }
.source-toggles input, .resource-options input { width: auto; }
.source-config { margin: 0.75rem 0; padding: 0.8rem; border-left: 3px solid var(--action); background: var(--surface-subtle); }
.web-query-suggestions { display: grid; gap: 0.4rem; margin-top: 0.65rem; }
.web-query-suggestions strong { font-size: 0.86rem; }
.query-suggestion { width: fit-content; border: 0; padding: 0; background: none; color: var(--action); text-align: left; cursor: pointer; text-decoration: underline; }
.resource-options { display: grid; gap: 0.45rem; border: 0; }
.resource-options legend { margin-bottom: 0.5rem; font-weight: 700; }
.resource-options h3 { margin: 0; font-size: 1rem; }
.resource-options ul { margin: 0.25rem 0 0; padding-left: 1.2rem; }
.grounding-comparison { display: grid; grid-template-columns: 1fr 1fr; align-items: start; gap: 0.75rem; margin-top: 1rem; }
.grounding-pane > header p { margin: 0.2rem 0 0; }
.evidence-disclosure { padding: 0.75rem; border-bottom: 1px solid var(--line); background: var(--surface-subtle); }
.evidence-disclosure summary { cursor: pointer; font-weight: 700; }
.evidence-intro { margin: 0.65rem 0; color: var(--ink-muted); font-size: 0.9rem; }
.evidence-disclosure ol { max-height: 20rem; overflow-y: auto; padding-left: 1.5rem; }
.evidence-disclosure li { margin-bottom: 0.75rem; }
.evidence-disclosure li p { max-height: 8rem; overflow: auto; white-space: pre-wrap; font-size: 0.85rem; }
.evidence-disclosure li strong, .evidence-disclosure li .source-type { display: block; }
.evidence-disclosure li .source-type { margin-bottom: 0.2rem; color: var(--action); font-size: 0.78rem; font-weight: 700; text-transform: uppercase; }
.evidence-disclosure li small { color: var(--ink-muted); }
.source-errors { color: #704900; }

.note, .event-resolution {
  padding: 0.75rem 0.9rem;
  border: 1px solid #e7cf92;
  border-radius: var(--radius-sm);
  background: var(--uncertain-bg);
  color: #704900;
}

.demo-list { display: flex; flex-direction: column; gap: 0.65rem; margin: 1rem 0; padding: 0; list-style: none; }
.demo-event { padding: 1rem; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); }
.demo-event.disagreement { border-color: #d8b862; background: #fffaf0; }
.event-kind { display: inline-block; margin-bottom: 0.35rem; color: var(--ink-muted); font-size: 0.82rem; font-weight: 700; }
.demo-event h2 { margin: 0; }
.event-resolution { margin: 0.7rem 0 0; }
.orchestration-map { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.75rem; margin: 1.25rem 0; }
.orchestration-map::before { content: ""; position: absolute; top: 50%; right: 8%; left: 8%; height: 2px; background: var(--line-strong); z-index: 0; }
.agent-node { position: relative; z-index: 1; min-height: 5.5rem; padding: 0.8rem; border: 2px solid var(--line); border-radius: var(--radius-md); background: var(--surface); transition: border-color 180ms ease, background-color 180ms ease, opacity 180ms ease; }
.agent-node:first-child { grid-column: 1 / -1; justify-self: center; width: min(18rem, 100%); }
.agent-node span, .agent-node strong { display: block; }
.agent-node span { color: var(--ink-muted); font-size: 0.75rem; font-weight: 700; text-transform: uppercase; }
.agent-node.active { border-color: var(--action); background: #edf1fc; box-shadow: 0 0 0 3px rgb(53 83 164 / 12%); }
.work-product-panel, .human-gate, .evidence-trail { margin: 1rem 0; padding: 1rem; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); }
.human-gate { border-color: #d8b862; background: var(--uncertain-bg); }
.evidence-trail li { margin-bottom: 0.5rem; }

.takeaway-list { display: flex; flex-direction: column; gap: 0.65rem; margin-top: 1rem; }
.takeaway-groups { display: grid; gap: 1rem; margin-top: 1rem; }
.takeaway-groups fieldset { display: grid; gap: 0.45rem; padding: 1rem; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); }
.takeaway-groups legend { padding-inline: 0.35rem; font-weight: 750; }
.takeaway-option { display: flex; align-items: flex-start; gap: 0.55rem; padding: 0.55rem; border-radius: var(--radius-sm); }
.takeaway-option:hover { background: var(--surface-subtle); }
.takeaway-option input { width: auto; margin-top: 0.2rem; }
.takeaway-option span, .takeaway-option small { display: block; }
.takeaway-option small { margin-top: 0.2rem; color: var(--ink-muted); }
.takeaway-option.unavailable { opacity: 0.62; }
.screen-error, .empty-state { max-width: 42rem; }
.reset-workspace { margin-top: 2rem; padding-top: 1.25rem; border-top: 1px solid var(--line); }
.reset-workspace p { max-width: 42rem; color: var(--ink-muted); }

@media (max-width: 45rem) {
  .app { padding: 1rem 1rem 3rem; }
  .topbar, .screen-heading { align-items: flex-start; flex-direction: column; }
  .nav { width: 100%; }
  .nav a { flex: 1; justify-content: center; }
  .activity-row { grid-template-columns: auto 1fr; }
  .activity-row .btn { grid-column: 2; justify-self: start; }
  .pair { grid-template-columns: 1fr; }
  .style-grid { grid-template-columns: 1fr 1fr; }
  .pane-selectors, .chat-grid { grid-template-columns: 1fr; }
  .chat-transcript { height: 24rem; }
  .onet-results, .onet-summary { grid-template-columns: 1fr; }
  .inline-form > div { align-items: stretch; flex-direction: column; }
  .canvas-part { min-height: auto; }
  .access-date { white-space: normal; }
  .wide-workspace .session-workspace,
  .wide-workspace .pair-prompt-form,
  .wide-workspace .pair-chat-grid,
  .wide-workspace .grounding-comparison {
    left: auto;
    width: 100%;
    transform: none;
  }
  .grounding-comparison { grid-template-columns: 1fr; }
  .orchestration-map { grid-template-columns: 1fr 1fr; }
  .agent-node:first-child { grid-column: 1 / -1; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; }
  .agent-node, .orchestration-map::before { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}