:root {
  color-scheme: light;
  --page: #ffffff;      --band: #f5f5f5;     --fold: #f7f7f7;
  --card: #b3b3b3;      --rule: #dcdcdc;     --hair: #e6e6e6;
  --ink: #1a1a1a;       --ink-2: #333333;    --muted: #595959;  --muted-2: #666666;
  --redacted: #b0b0b0;  --hover: #e6e6e6;
  --mark: #ffe680;
  --mark-edge: #9a7b00;
  --control-edge: #949494;
  --ai: #1d4e6b;        --ai-on-black: #7fc4e8;
  --uva: #bc0031;       --uva-hover: #8f0026;
  --disabled-bg: #ededed; --disabled-border: #e0e0e0; --disabled-ink: #767676;
  --sans: "Source Sans 3", system-ui, -apple-system, sans-serif;
  --serif: Spectral, Georgia, "Times New Roman", serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--page); color: var(--ink);
  font: 16px/1.55 var(--sans);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--uva); }
a:hover { color: var(--uva-hover); }
input[type=checkbox] { accent-color: var(--ink); }
::selection { background: #e6e2d9; }
@keyframes acoiflash {
  0% { opacity: 0; transform: translateY(8px); }
  10% { opacity: 1; transform: none; }
  75% { opacity: 1; }
  100% { opacity: 0; transform: translateY(-4px); }
}

#shell { display: flex; flex-direction: column; min-height: 100vh; }
#shell.task { min-height: 100vh; }
#shell.task #main { flex: 0 0 auto; }
#shell.task #chrome { position: sticky; top: 0; z-index: 7; }
#chrome {
  flex: none; display: flex; align-items: center; gap: 14px;
  padding: 8px 20px; background: var(--page); border-bottom: 1px solid var(--rule);
}
#chrome .logo {
  flex: none; height: 32px; display: flex; align-items: center;
  font: 11px/1 var(--sans); color: #9a9a9a; letter-spacing: .06em;
}
#chrome .logo img { height: 26px; width: auto; max-width: 320px; display: block; }
#chrome .logo .ph {
  border: 1px dashed var(--rule); border-radius: 2px; padding: 8px 10px;
  text-transform: uppercase;
}
#chrome .partner { flex: none; display: flex; align-items: center; gap: 8px; }
#chrome .commissioned { font-size: 11.5px; color: var(--muted); white-space: nowrap; }
#chrome .divider { flex: none; width: 1px; height: 34px; background: var(--rule); }
#chrome .titles { display: flex; flex-direction: column; min-width: 0; }
#chrome .titles b { font: 600 14.5px/1.3 var(--serif); font-weight: 600; }
#chrome .titles span { font-size: 11.5px; color: var(--muted); }
#chrome .spacer { flex: 1; }
#chrome .code { flex: none; font-size: 11.5px; color: var(--muted); }
#chrome .code b { font-family: var(--mono); color: var(--ink); letter-spacing: .06em; }
#chrome .version { flex: none; font: 10.5px var(--mono); color: #9a9a9a; }
#researcher {
  flex: none; padding: 5px 20px; background: var(--band);
  border-bottom: 1px solid var(--rule);
  font: 11.5px/1.4 var(--mono); color: var(--muted);
}

.doccount {
  flex: none; font-size: 12.5px; color: var(--muted);
  font-variant-numeric: tabular-nums;
}

#main { flex: 1 1 auto; min-height: 0; }
.column { max-width: 760px; margin: 0 auto; padding: 36px 22px 90px; }
.column.wide { max-width: 820px; }
.column.narrow { max-width: 700px; }
.column.trial { max-width: 880px; padding: 18px 20px 24px; }
p.kicker {
  margin: 0 0 6px; font: 600 11.5px/1.3 var(--sans); color: var(--muted);
  letter-spacing: .08em; text-transform: uppercase;
}
h1.page {
  margin: 0 0 8px; padding-left: 18px; border-left: 2px solid var(--uva);
  font: 600 30px/1.2 var(--serif); letter-spacing: -.005em;
}
p.lead { margin: 0 0 26px; color: var(--muted); font-size: 14px; text-wrap: pretty; }
h2.section { margin: 0 0 5px; font: 600 16px/1.35 var(--serif); }
p.body { margin: 0 0 20px; color: var(--ink-2); font-size: 14.5px; text-wrap: pretty; }
.chip-ph {
  background: #f0f0f0; padding: 0 4px; border-radius: 2px; color: var(--muted);
  font-family: var(--mono); font-size: 12.5px;
}
.codebox {
  padding: 14px 16px; background: var(--page); border: 1px solid var(--rule);
  border-radius: 3px; margin: 0 0 26px;
}
.codebox .note { font-size: 12.5px; color: var(--muted); margin-bottom: 4px; text-wrap: pretty; }
.codebox .code { font: 600 19px/1.2 var(--mono); letter-spacing: .1em; }
.codebox.small .code { font-size: 17px; }
.checklist { border-bottom: 1px solid var(--hair); margin-bottom: 22px; }
.checklist label {
  display: flex; gap: 11px; align-items: flex-start; padding: 10px 2px;
  border-top: 1px solid var(--hair); cursor: pointer;
}
.checklist input { margin: 3px 0 0; width: 16px; height: 16px; flex: none; }
.checklist span { font-size: 14.5px; text-wrap: pretty; }
.actions { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
.actions .hint { font-size: 12.5px; color: var(--muted); }
.actions .back {
  display: inline-flex; align-items: center; gap: 6px; padding: 8px 4px;
  background: none; border: 0; color: var(--muted); cursor: pointer;
  font: 13.5px var(--sans); border-radius: 3px;
}
.actions .back:hover { color: var(--ink); text-decoration: underline; }
.actions .back .arrow { font-size: 15px; line-height: 1; }

.coderow { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.copy {
  padding: 5px 11px; border-radius: 3px; cursor: pointer; font: 12.5px var(--sans);
  background: var(--page); color: var(--muted); border: 1px solid var(--rule);
}
.copy:hover { background: var(--band); border-color: #999999; color: var(--ink); }
.copy.done { color: var(--ink); border-color: var(--ink); font-weight: 600; }

.scope {
  display: grid; gap: 12px; margin: 0 0 26px; padding: 14px 16px;
  background: var(--band); border: 1px solid var(--rule); border-radius: 3px;
}
.scope .part { display: flex; gap: 11px; align-items: flex-start; }
.scope .part .mark {
  flex: none; width: 20px; height: 20px; border-radius: 50%; margin-top: 1px;
  display: grid; place-items: center; font-size: 12px; color: #fff;
}
.scope .part.ja .mark { background: var(--ink); }
.scope .part.nee .mark { background: var(--muted); }
.scope .part .t { display: grid; gap: 2px; font-size: 14px; text-wrap: pretty; }
.scope .part .t b { font-weight: 600; }

.q .qnote { margin: 0 0 9px; font-size: 12.5px; color: var(--muted); text-wrap: pretty; }
.q .label .req { color: #b42318; font-weight: 600; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.q .qnote.warn { color: #9b2c2c; }
.q input.email {
  width: 100%; max-width: 420px; padding: 9px 12px; border: 1px solid var(--control-edge);
  border-radius: 3px; background: var(--page); color: var(--ink); font: 14px var(--sans);
}
.notebox {
  margin: 4px 0 0; padding: 12px 14px; background: var(--band);
  border: 1px solid var(--rule); border-radius: 3px;
  font-size: 13px; color: var(--ink-2); text-wrap: pretty;
}
.notebox.warmup-note { margin: 22px 0 20px; font-size: 14px; }
button.primary {
  padding: 10px 20px; border-radius: 3px; font: 600 14px var(--sans);
  background: var(--ink); color: #fff; border: 1px solid var(--ink); cursor: pointer;
}
button.primary:hover { background: var(--ink-2); }
button.primary[disabled] {
  background: var(--disabled-bg); color: var(--disabled-ink);
  border-color: var(--disabled-border); cursor: not-allowed;
}
button.secondary {
  padding: 10px 16px; background: none; border: 1px solid var(--rule);
  color: var(--muted); border-radius: 3px; font: 14px var(--sans); cursor: pointer;
}
button.secondary:hover { border-color: #999999; color: var(--ink); }

.steps {
  display: grid; gap: 1px; background: var(--rule);
  border: 1px solid var(--rule); border-radius: 3px; margin: 0 0 26px;
}
.steps .step {
  background: var(--page); padding: 16px 18px;
  display: grid; grid-template-columns: 22px 1fr; gap: 12px; align-items: start;
}
.steps .n { font: 600 13px/22px var(--mono); color: var(--muted); }
.steps .t { font-size: 14.5px; text-wrap: pretty; }
.steps .t b { font-weight: 600; }
.samples {
  display: grid; gap: 9px; padding: 14px 16px; background: var(--page);
  border: 1px solid var(--rule); border-radius: 3px; margin: 0 0 26px; font-size: 13.5px;
}
.samples .row { display: flex; gap: 12px; align-items: baseline; flex-wrap: wrap; }
.samples .s { flex: none; min-width: 190px; font: 14px/1.6 var(--mono); color: var(--ink); }
.samples .s.on { background: var(--mark); color: var(--ink); padding: 1px 2px; border-radius: 2px;
  box-shadow: inset 0 1px 0 var(--mark-edge), inset 0 -1px 0 var(--mark-edge); }
.samples .s.sugg { box-shadow: inset 0 -3px 0 var(--ai); padding: 1px 2px; }
.samples .s.inert { color: var(--muted-2); }
.samples .s.on.sugg { background: var(--mark); color: var(--ink); box-shadow: inset 0 1px 0 var(--mark-edge), inset 0 -3px 0 var(--ai); padding: 1px 2px; }

.chipslot:empty { display: none; }

.warmup {
  padding: 10px 14px; background: var(--band); border: 1px solid var(--rule);
  border-radius: 3px; font-size: 13px; color: var(--muted); margin-bottom: 14px;
  text-wrap: pretty;
}
.aistrip {
  display: flex; align-items: center; gap: 9px;
  margin: 0 0 14px; padding: 10px 14px; background: var(--ai); border-radius: 2px;
  font-size: 14.5px; line-height: 1.45; color: #fff; text-wrap: pretty;
}
.aistrip b { font-weight: 600; }
.aistrip.analysing { background: #3f5563; color: #e6edf1; }
.aistrip.found, .aistrip.nothing { background: var(--ai); }
.aistrip.result, .aistrip.found, .aistrip.nothing { display: block; }
.aistrip .spinner {
  flex: none; width: 13px; height: 13px; border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, .3); border-top-color: #fff;
  animation: acoispin .75s linear infinite;
}
.aistrip.result { animation: acoipop .24s ease-out; }
@keyframes acoispin { to { transform: rotate(360deg); } }
@keyframes acoipop {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: none; }
}
.msg { background: var(--page); border: 1px solid var(--card); border-radius: 3px; overflow: hidden; }
.msg .cardtitle {
  padding: 7px 14px; background: var(--band); border-bottom: 1px solid var(--hair);
  font-size: 11px; letter-spacing: .09em; text-transform: uppercase; color: var(--muted);
  user-select: none;
}
.msg.busy { opacity: .62; }
.msg.busy .unit { cursor: default; }
.msg.busy .unit:hover, .msg.busy .unit:focus-visible { background: transparent; box-shadow: none; }
.msg dl {
  margin: 0; padding: 12px 18px; display: grid;
  grid-template-columns: max-content minmax(0, 1fr); gap: 5px 18px;
  background: var(--page); border-bottom: 1px solid var(--hair);
  font: 13px/1.5 var(--mono); color: var(--ink-2); user-select: none;
}
.msg dt { color: var(--muted-2); font-weight: 400; }
.msg dd { margin: 0; overflow-wrap: anywhere; color: var(--muted-2); }
.msg .bodytext {
  padding: 16px 18px 20px; font: 14.5px/1.6 var(--mono);
  white-space: pre-wrap; overflow-wrap: break-word; max-width: 80ch;
}
.msg .sigline { color: var(--muted-2); user-select: none; }
.unit {
  display: inline; border-radius: 2px; padding: 4px 1px 2px; margin: 0 -1px;
  cursor: pointer;
  box-decoration-break: clone; -webkit-box-decoration-break: clone; outline: none;
}
.unit:hover, .unit:focus-visible { background: var(--hover); }
.unit:focus-visible { outline: 2px solid var(--ink); outline-offset: 1px; }
.unit.on { background: var(--mark); color: var(--ink);
  box-shadow: inset 0 1px 0 var(--mark-edge), inset 0 -1px 0 var(--mark-edge); }
.unit.on:hover, .unit.on:focus-visible { background: var(--hover); color: var(--ink); }
.unit.sugg { box-shadow: inset 0 -3px 0 var(--ai); }
.unit.sugg:hover, .unit.sugg:focus-visible { background: var(--hover); box-shadow: inset 0 -3px 0 var(--ai); }
.unit.on.sugg { background: var(--mark); box-shadow: inset 0 1px 0 var(--mark-edge), inset 0 -3px 0 var(--ai); }
.unit.on.sugg:hover, .unit.on.sugg:focus-visible { background: var(--hover); color: var(--ink); box-shadow: inset 0 1px 0 var(--mark-edge), inset 0 -3px 0 var(--ai); }
.unit[data-settled]:hover, .unit[data-settled]:focus-visible {
  background: transparent; color: var(--ink); box-shadow: none;
}
.unit.on[data-settled]:hover, .unit.on[data-settled]:focus-visible {
  background: var(--mark); color: var(--ink);
  box-shadow: inset 0 1px 0 var(--mark-edge), inset 0 -1px 0 var(--mark-edge);
}
.unit.sugg[data-settled]:hover, .unit.sugg[data-settled]:focus-visible {
  background: transparent; box-shadow: inset 0 -3px 0 var(--ai);
}
.unit.on.sugg[data-settled]:hover, .unit.on.sugg[data-settled]:focus-visible {
  background: var(--mark); color: var(--ink); box-shadow: inset 0 1px 0 var(--mark-edge), inset 0 -3px 0 var(--ai);
}
.unit.revealing { animation: acoiunderline .3s ease-out; }
@keyframes acoiunderline {
  from { box-shadow: inset 0 0 0 var(--ai); }
  to { box-shadow: inset 0 -3px 0 var(--ai); }
}
.suggchip {
  display: flex; gap: 8px; align-items: center; flex-wrap: wrap;
  margin: 10px 0 2px; font-family: var(--sans);
}
.suggchip button {
  min-height: 32px; padding: 6px 14px; border-radius: 3px; font: 13px var(--sans);
  cursor: pointer; background: transparent;
}
.suggchip .accept { color: var(--ai); border: 1px solid #9fb8c4; }
.suggchip .accept:hover { background: #eef5f8; }
.suggchip .reject { color: var(--muted); border: 1px solid var(--rule); }
.suggchip .reject:hover { background: var(--band); border-color: #999999; }
.suggchip .accept.chosen { background: var(--ai); border-color: var(--ai); color: #fff; }
.suggchip .reject.chosen { background: var(--muted); border-color: var(--muted); color: #fff; }

#help {
  position: fixed; inset: 0; z-index: 20; background: rgba(20, 20, 20, .45);
  display: flex; justify-content: center; align-items: flex-start;
  padding: 24px 12px; overflow-y: auto;
}
#help .panel {
  background: var(--page); border-radius: 4px; box-shadow: 0 8px 30px rgba(0, 0, 0, .25);
  margin: 0; padding: 28px 28px 24px;
}
#footer .help { padding: 8px 14px; font-size: 13px; }
#help .close { float: right; margin: -8px -8px 8px 12px; padding: 6px 12px; font-size: 13px; }
#footer { flex: none; background: var(--page); border-top: 1px solid var(--rule); }
#footer { position: sticky; bottom: 0; z-index: 6; }
#footer .track { height: 3px; background: var(--hair); }
#footer .track span { display: block; height: 3px; background: var(--uva); }
#footer .row {
  max-width: 880px; margin: 0 auto; padding: 11px 20px;
  display: flex; align-items: center; gap: 16px;
}

.q { padding: 16px 0; border-top: 1px solid var(--hair); }
.q .label { font-size: 14.5px; margin-bottom: 10px; text-wrap: pretty; }
.q .scale { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.q .anchor { font-size: 11.5px; color: var(--muted-2); }
.q .anchor.left { min-width: 74px; }
.q .opts { display: flex; gap: 4px; flex-wrap: wrap; }
.q .opts.rows { gap: 6px; }
.q button {
  padding: 7px 13px; border-radius: 3px; font: 13.5px var(--sans); cursor: pointer;
  background: var(--page); color: var(--muted); border: 1px solid var(--control-edge);
}
.q button[aria-pressed="true"] {
  background: var(--ink); color: #fff; border-color: var(--ink); font-weight: 600;
}
.q .opts.scalebtns button { min-width: 38px; }
.q textarea {
  width: 100%; padding: 10px 12px; border: 1px solid var(--control-edge); border-radius: 3px;
  background: var(--page); color: var(--ink); font: 14px/1.6 var(--sans); resize: vertical;
}

.panel {
  padding: 18px 20px; background: var(--page); border: 1px solid var(--card);
  border-radius: 3px; margin: 0 0 24px;
}
.panel h2 { margin: 0 0 6px; font: 600 16px/1.35 var(--serif); }
.panel p { margin: 0 0 16px; color: var(--ink-2); font-size: 14.5px; text-wrap: pretty; }
.panel p:last-child { margin-bottom: 0; }
.bigopts { display: grid; gap: 10px; margin: 0 0 22px; }
.bigopts button {
  display: block; width: 100%; text-align: left; padding: 14px 16px; border-radius: 3px;
  cursor: pointer; background: var(--page); font-family: var(--sans);
  border: 1px solid var(--control-edge);
}
.bigopts button[aria-pressed="true"] { border: 2px solid var(--ink); box-shadow: 0 1px 0 var(--hair); }
.bigopts .t { display: block; font-weight: 600; font-size: 14.5px; margin-bottom: 3px; }
.bigopts .s { display: block; font-size: 13px; color: var(--muted); font-weight: 400; }
input[type=email] {
  width: 100%; max-width: 340px; padding: 9px 12px; border-radius: 3px;
  font: 14px var(--sans); border: 1px solid var(--control-edge); background: var(--page); color: var(--ink);
}
input[type=email][disabled] { border-color: var(--disabled-border); background: var(--fold); color: var(--disabled-ink); }

#toast {
  position: fixed; left: 50%; bottom: 74px; transform: translateX(-50%); z-index: 9;
  padding: 9px 15px; background: var(--ink); color: #fff; border-radius: 3px;
  font-size: 13px; box-shadow: 0 4px 14px rgba(28,28,26,.18);
  animation: acoiflash 2.4s ease forwards;
}
@media (prefers-reduced-motion: reduce) {
  #toast, .aistrip.result, .unit.revealing { animation: none; }
  .aistrip .spinner { animation: none; border-top-color: rgba(255, 255, 255, .6); }
}

.newsession {
  margin: 18px 0 0; font-size: 12.5px; color: var(--muted-2);
}
.newsession button {
  background: none; border: none; padding: 0; color: var(--muted);
  font: 12.5px var(--sans); text-decoration: underline; cursor: pointer;
}
.newsession button:hover { color: var(--ink); }

#sendstate { flex: none; font: 11.5px var(--mono); color: var(--muted); }
#sendstate.pending { color: var(--uva); }

@media (max-width: 860px) {
  #chrome .logo img { height: 20px; }
}
@media (max-width: 620px) {
  #chrome { flex-wrap: wrap; gap: 8px; padding: 8px 14px; }
  #chrome .divider { display: none; }
  #chrome { position: relative; }
  #chrome .version { position: absolute; top: 3px; right: 8px; font-size: 9.5px; }
  .column { padding: 24px 16px 80px; }
  .column.trial { padding: 14px 16px 20px; }
  h1.page { font-size: 25px; }
  .samples .s { min-width: 0; }
}