styles.css

:root {
  --ink: #18232c;
  --muted: #5e6b75;
  --line: #d6dde1;
  --line-strong: #b9c4ca;
  --soft: #f5f7f8;
  --soft-strong: #eaf0f1;
  --panel: #ffffff;
  --teal: #087d70;
  --teal-dark: #075e56;
  --teal-soft: #e1f2ef;
  --gold: #93630b;
  --gold-soft: #fff1cf;
  --red: #a33c3c;
  --red-soft: #fff0ef;
  --green: #247345;
  --green-soft: #e8f5ec;
  --blue: #35658a;
  --blue-soft: #eaf2f8;
  --page-pad: max(18px, calc((100vw - 1480px) / 2));
  color: var(--ink);
  background: var(--panel);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

* { box-sizing: border-box; }
html { min-width: 320px; }
body { margin: 0; min-width: 320px; font-size: 14px; line-height: 1.5; }
button, select { font: inherit; letter-spacing: 0; }
button { cursor: pointer; }
button:focus-visible, select:focus-visible, summary:focus-visible { outline: 3px solid #9bd1ca; outline-offset: 1px; }
[hidden] { display: none !important; }

.app-header {
  min-height: 92px;
  padding: 20px var(--page-pad);
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 28px;
  color: white;
  background: #18232c;
  border-bottom: 4px solid var(--teal);
}

h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 0; font-size: 27px; line-height: 1.15; font-weight: 690; }
h2 { margin-bottom: 0; font-size: 20px; line-height: 1.25; font-weight: 680; }
h3 { margin: 0; font-size: 16px; line-height: 1.3; font-weight: 680; }
.eyebrow { margin-bottom: 5px; color: #687780; font-size: 10px; font-weight: 740; text-transform: uppercase; }
.app-header .eyebrow { color: #9ed4ce; }
.header-meta { max-width: 55%; display: flex; flex-direction: column; align-items: flex-end; gap: 3px; color: #d5dee4; font-size: 12px; text-align: right; }
.header-meta strong { color: white; font-size: 13px; }

.view-tabs {
  height: 48px;
  padding: 0 var(--page-pad);
  display: flex;
  align-items: stretch;
  gap: 28px;
  background: white;
  border-bottom: 1px solid var(--line);
}
.tab { padding: 0 2px; border: 0; border-bottom: 3px solid transparent; color: var(--muted); background: transparent; font-weight: 660; }
.tab:hover { color: var(--teal-dark); }
.tab.active { color: var(--ink); border-bottom-color: var(--teal); }

main { width: 100%; }
.control-band {
  position: sticky;
  top: 0;
  z-index: 10;
  min-height: 74px;
  padding: 11px var(--page-pad);
  display: grid;
  grid-template-columns: minmax(210px, .85fr) minmax(370px, 1.5fr) minmax(150px, .55fr) auto;
  align-items: end;
  gap: 12px;
  background: #f8fafb;
  border-bottom: 1px solid var(--line);
  box-shadow: 0 1px 2px rgb(24 35 44 / 8%);
}
label { min-width: 0; color: var(--muted); font-size: 10px; font-weight: 700; }
select {
  width: 100%;
  height: 38px;
  margin-top: 4px;
  padding: 0 30px 0 10px;
  overflow: hidden;
  color: var(--ink);
  background: white;
  border: 1px solid var(--line-strong);
  border-radius: 5px;
  text-overflow: ellipsis;
}
.select-with-actions { margin-top: 4px; display: grid; grid-template-columns: 38px minmax(0, 1fr) 38px; gap: 6px; }
.select-with-actions select { margin-top: 0; }
.icon-button {
  width: 38px;
  height: 38px;
  padding: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--ink);
  background: white;
  border: 1px solid var(--line-strong);
  border-radius: 5px;
}
.icon-button svg { width: 18px; height: 18px; stroke-width: 2.25; }
.icon-button:hover:not(:disabled) { color: var(--teal-dark); border-color: var(--teal); }
.icon-button:disabled { color: #a7b1b7; background: var(--soft); cursor: default; }
.control-status { min-width: 88px; margin: 0 0 9px; color: var(--muted); font-size: 11px; text-align: right; white-space: nowrap; }

.loading, .error-state { padding: 70px var(--page-pad); color: var(--muted); text-align: center; }
.error-state { color: var(--red); }
#trajectory-content > section, #overview-view > section, .overview-heading { padding: 30px var(--page-pad); border-bottom: 1px solid var(--line); }
.summary-section, .rubric-section { background: white; }
.context-section, .round-section { background: #f8fafb; }
.section-heading { margin-bottom: 18px; display: flex; align-items: end; justify-content: space-between; gap: 24px; }
.section-subtitle { margin: 5px 0 0; color: var(--muted); font-size: 12px; }
.mono { max-width: 55%; overflow-wrap: anywhere; color: var(--muted); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 10px; text-align: right; }

.metric-strip { display: grid; grid-template-columns: repeat(6, minmax(105px, 1fr)); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.metric-cell { min-width: 0; padding: 11px 13px; border-right: 1px solid var(--line); }
.metric-cell:first-child { padding-left: 0; }
.metric-cell:last-child { border-right: 0; }
.metric-cell span { display: block; color: var(--muted); font-size: 9px; font-weight: 700; text-transform: uppercase; }
.metric-cell strong { display: block; margin-top: 2px; overflow-wrap: anywhere; font-size: 17px; font-variant-numeric: tabular-nums; }
.metric-cell small { display: block; margin-top: 1px; color: var(--muted); font-size: 9px; }
.metric-cell.proxy strong { color: var(--teal-dark); }
.metric-cell.gold strong { color: var(--gold); }
.metric-cell.positive strong { color: var(--green); }
.metric-cell.negative strong { color: var(--red); }
.score-key { margin: 9px 0 0; color: var(--muted); font-size: 10px; }
.score-key strong:first-child { color: var(--teal-dark); }
.score-key strong:last-of-type { color: var(--gold); }
.score-key span { margin: 0 5px; color: var(--line-strong); }

.context-layout { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(340px, .8fr); gap: 34px; align-items: start; }
.context-column { min-width: 0; }
.reference-column { min-width: 0; padding: 18px 20px 20px; background: white; border: 1px solid var(--line); border-top: 3px solid var(--gold); border-radius: 6px; }
.column-heading { margin-bottom: 13px; }
.context-meta { margin: 0 0 18px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--line); }
.context-meta div { min-width: 0; padding: 8px 13px 8px 0; border-bottom: 1px solid var(--line); }
.context-meta dt { color: var(--muted); font-size: 9px; font-weight: 720; text-transform: uppercase; }
.context-meta dd { margin: 2px 0 0; overflow-wrap: anywhere; font-size: 11px; font-weight: 630; }
.structured-text { max-width: 92ch; color: #27343e; font-size: 13px; line-height: 1.67; overflow-wrap: anywhere; }
.structured-text > :first-child { margin-top: 0; }
.structured-text > :last-child { margin-bottom: 0; }
.structured-text p { margin: 0 0 12px; }
.structured-text ol, .structured-text ul { margin: 8px 0 14px; padding-left: 24px; }
.structured-text li { margin: 7px 0; padding-left: 3px; }
.structured-text strong { color: var(--ink); font-weight: 720; }
.response-text { max-width: none; font-size: 14px; line-height: 1.72; }
.clampable { position: relative; overflow: hidden; }
.context-text.is-clamped { max-height: 325px; }
.rubric-text.is-clamped { max-height: 430px; }
.clampable.is-clamped { padding-bottom: 10px; border-bottom: 1px solid var(--line); }
.text-button { margin-top: 9px; padding: 4px 0; color: var(--teal-dark); background: transparent; border: 0; font-size: 11px; font-weight: 720; }
.text-button:hover { text-decoration: underline; }

details { margin-top: 13px; background: white; border: 1px solid var(--line); border-radius: 6px; }
summary { padding: 11px 13px; display: flex; justify-content: space-between; gap: 16px; color: #34424e; cursor: pointer; font-size: 12px; font-weight: 660; }
.trace-size { flex: 0 0 auto; color: var(--muted); font-size: 10px; font-weight: 500; white-space: nowrap; }
.message-list, .details-content { margin: 0; padding: 16px; border-top: 1px solid var(--line); }
.message { padding: 12px 0; border-top: 1px solid var(--line); }
.message:first-child { padding-top: 0; border-top: 0; }
.message:last-child { padding-bottom: 0; }
.message-role { color: var(--teal-dark); font-size: 9px; font-weight: 740; text-transform: uppercase; }
.message-content { max-width: 110ch; margin-top: 5px; white-space: pre-wrap; overflow-wrap: anywhere; font-size: 12px; line-height: 1.55; }
.rubric-text { max-width: 108ch; }
.status-badge, .badge {
  display: inline-flex;
  align-items: center;
  min-height: 22px;
  padding: 3px 7px;
  color: #3d4b55;
  background: var(--soft-strong);
  border: 1px solid var(--line);
  border-radius: 3px;
  font-size: 9px;
  font-weight: 740;
  text-transform: uppercase;
}
.status-badge.valid, .badge.selected { color: var(--teal-dark); background: var(--teal-soft); border-color: #abd8d2; }
.badge.tie { color: var(--gold); background: var(--gold-soft); border-color: #e6cf99; }
.badge.invalid { color: var(--red); background: var(--red-soft); border-color: #e6baba; }
.badge.improved { color: var(--green); background: var(--green-soft); border-color: #b8dcc4; }
.badge.worsened { color: var(--red); background: var(--red-soft); border-color: #e6baba; }
.badge-row { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 5px; }

.round-heading { align-items: end; }
.round-actions { display: flex; gap: 6px; }
.round-track { width: 100%; margin-bottom: 20px; display: grid; grid-template-columns: repeat(9, minmax(112px, 1fr)); overflow-x: auto; border: 1px solid var(--line-strong); background: var(--line); gap: 1px; }
.round-button { min-width: 112px; height: 82px; padding: 8px 9px; display: grid; grid-template-rows: auto 1fr auto; color: var(--ink); background: white; border: 0; text-align: left; }
.round-button:hover { background: #f4faf8; }
.round-button.active { background: var(--teal-soft); box-shadow: inset 0 3px 0 var(--teal); }
.round-button.tie:not(.active) { box-shadow: inset 0 3px 0 var(--gold); }
.round-button-top { display: flex; justify-content: space-between; gap: 5px; color: var(--muted); font-size: 9px; font-weight: 720; text-transform: uppercase; }
.round-button-mark { color: var(--teal-dark); }
.round-button-scores { align-self: center; display: grid; grid-template-columns: 1fr 1fr; gap: 7px; font-size: 11px; font-variant-numeric: tabular-nums; }
.round-button-scores span:first-child { color: var(--teal-dark); }
.round-button-scores span:last-child { color: var(--gold); }
.round-button-delta { color: var(--muted); font-size: 9px; font-variant-numeric: tabular-nums; }
.round-button-delta.positive { color: var(--green); }
.round-button-delta.negative { color: var(--red); }

.feedback-band { margin-bottom: 20px; padding: 17px 20px; background: #eef5f7; border-left: 4px solid var(--blue); }
.feedback-heading { display: flex; align-items: start; justify-content: space-between; gap: 18px; }
.feedback-heading h3 { font-size: 15px; }
.score-pills { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 6px; }
.score-pill { min-width: 78px; padding: 5px 8px; background: white; border: 1px solid #c8d8e1; font-size: 9px; }
.score-pill span { display: block; color: var(--muted); text-transform: uppercase; }
.score-pill strong { display: block; margin-top: 1px; font-size: 13px; font-variant-numeric: tabular-nums; }
.score-pill.proxy strong { color: var(--teal-dark); }
.score-pill.gold strong { color: var(--gold); }
blockquote { margin: 15px 0 0; color: #223541; font-size: 15px; line-height: 1.55; font-weight: 570; }
.feedback-note { margin: 9px 0 0; color: var(--muted); font-size: 10px; }
.feedback-note.fallback { color: var(--red); }

.revision-comparison { display: grid; grid-template-columns: minmax(0, 1fr) 44px minmax(0, 1fr); align-items: stretch; }
.response-pane { min-width: 0; padding: 19px 20px 22px; background: white; border: 1px solid var(--line); border-top: 3px solid var(--teal); border-radius: 6px; }
.next-pane { border-top-color: var(--blue); }
.response-pane.empty { color: var(--muted); background: var(--soft); border-top-color: var(--line-strong); }
.response-pane-heading { min-height: 45px; margin-bottom: 12px; display: flex; align-items: start; justify-content: space-between; gap: 14px; }
.revision-arrow { display: flex; align-items: center; justify-content: center; color: var(--blue); }
.revision-arrow svg { width: 20px; height: 20px; stroke-width: 2; }
.response-scores { margin-bottom: 16px; display: grid; grid-template-columns: repeat(3, minmax(70px, 1fr)); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.response-score { min-width: 0; padding: 7px 9px; border-right: 1px solid var(--line); }
.response-score:first-child { padding-left: 0; }
.response-score:last-child { border-right: 0; }
.response-score span { display: block; color: var(--muted); font-size: 8px; font-weight: 700; text-transform: uppercase; }
.response-score strong { display: block; overflow-wrap: anywhere; font-size: 14px; font-variant-numeric: tabular-nums; }
.response-score.proxy strong { color: var(--teal-dark); }
.response-score.gold strong { color: var(--gold); }
.response-score.positive strong { color: var(--green); }
.response-score.negative strong { color: var(--red); }

.history-section { margin-top: 30px; padding-top: 25px; border-top: 2px solid var(--line-strong); }
.compact-heading { margin-bottom: 12px; }
.history-scroll { width: 100%; overflow-x: auto; border: 1px solid var(--line); background: white; }
.history-table { width: 100%; min-width: 1000px; border-collapse: collapse; text-align: left; }
.history-table th, .history-table td { padding: 9px 11px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); vertical-align: top; }
.history-table tr > :last-child { border-right: 0; }
.history-table tbody tr:last-child > * { border-bottom: 0; }
.history-table thead th { color: var(--muted); background: var(--soft-strong); font-size: 9px; font-weight: 740; text-transform: uppercase; white-space: nowrap; }
.history-table tbody tr { cursor: pointer; }
.history-table tbody tr:hover { background: #f6faf9; }
.history-table tbody tr.active { background: var(--teal-soft); }
.history-table td { font-size: 11px; }
.history-table .numeric { font-variant-numeric: tabular-nums; white-space: nowrap; }
.history-table .proxy-value { color: var(--teal-dark); font-weight: 700; }
.history-table .gold-value { color: var(--gold); font-weight: 700; }
.history-table .feedback-preview { max-width: 390px; color: #3d4b55; }
.history-table button { padding: 0; color: var(--teal-dark); background: transparent; border: 0; font-weight: 720; }

.overview-heading { background: #f8fafb; }
.overview-summary { padding: 0 var(--page-pad); display: grid; grid-template-columns: repeat(5, minmax(120px, 1fr)); background: white; border-bottom: 1px solid var(--line); }
.overview-summary .metric-cell { padding-top: 17px; padding-bottom: 17px; }
.overview-band { background: white; }
.overview-band.alternate { background: #f8fafb; }
.outcome-chart { max-width: 980px; }
.outcome-bar { height: 46px; display: flex; overflow: hidden; border: 1px solid var(--line-strong); border-radius: 5px; }
.outcome-segment { min-width: 0; display: flex; align-items: center; justify-content: center; color: #24313a; font-size: 10px; font-weight: 730; white-space: nowrap; }
.outcome-segment.improved { background: #bfe2ca; }
.outcome-segment.unchanged { background: #dce3e6; }
.outcome-segment.worsened { background: #efc4c0; }
.outcome-legend { margin-top: 12px; display: flex; flex-wrap: wrap; gap: 18px; color: var(--muted); font-size: 11px; }
.outcome-legend strong { margin-left: 4px; color: var(--ink); font-variant-numeric: tabular-nums; }
.round-chart { width: 100%; min-height: 310px; overflow-x: auto; background: white; border: 1px solid var(--line); }
.round-chart svg { width: 100%; min-width: 720px; height: 310px; display: block; }
.chart-grid { stroke: #dfe5e8; stroke-width: 1; }
.chart-axis-label { fill: var(--muted); font-size: 10px; }
.chart-proxy { fill: none; stroke: var(--teal); stroke-width: 3; }
.chart-gold { fill: none; stroke: var(--gold); stroke-width: 3; }
.chart-dot-proxy { fill: white; stroke: var(--teal); stroke-width: 2; }
.chart-dot-gold { fill: white; stroke: var(--gold); stroke-width: 2; }
.chart-key { margin-top: 10px; display: flex; gap: 20px; color: var(--muted); font-size: 11px; }
.chart-key span::before { content: ""; width: 20px; height: 3px; margin-right: 7px; display: inline-block; vertical-align: middle; }
.proxy-key::before { background: var(--teal); }
.gold-key::before { background: var(--gold); }
.checkpoint-table { min-width: 820px; }

@media (max-width: 1120px) {
  .control-band { grid-template-columns: minmax(190px, .8fr) minmax(310px, 1.35fr) minmax(140px, .55fr) auto; }
  .metric-strip { grid-template-columns: repeat(3, minmax(120px, 1fr)); }
  .metric-cell:nth-child(3) { border-right: 0; }
  .metric-cell:nth-child(-n+3) { border-bottom: 1px solid var(--line); }
  .context-layout { grid-template-columns: minmax(0, 1.2fr) minmax(300px, .8fr); gap: 24px; }
}

@media (max-width: 820px) {
  .app-header { min-height: 84px; align-items: start; }
  .header-meta { display: none; }
  .control-band { position: static; grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr); }
  .control-band > label:nth-of-type(3) { display: none; }
  .control-status { grid-column: 1 / -1; margin: -3px 0 0; text-align: left; }
  .context-layout { grid-template-columns: 1fr; }
  .reference-column { order: -1; }
  .revision-comparison { grid-template-columns: 1fr; gap: 10px; }
  .revision-arrow { height: 28px; transform: rotate(90deg); }
  .overview-summary { grid-template-columns: repeat(3, minmax(100px, 1fr)); }
  .overview-summary .metric-cell:nth-child(3) { border-right: 0; }
  .overview-summary .metric-cell:nth-child(n+4) { border-top: 1px solid var(--line); }
}

@media (max-width: 560px) {
  :root { --page-pad: 14px; }
  body { font-size: 13px; }
  .app-header { padding-top: 17px; padding-bottom: 17px; }
  h1 { font-size: 23px; }
  h2 { font-size: 18px; }
  .view-tabs { height: 44px; }
  .control-band { grid-template-columns: 1fr; padding-top: 9px; padding-bottom: 9px; }
  .control-band > label:first-child { display: none; }
  .control-status { grid-column: auto; }
  #trajectory-content > section, #overview-view > section, .overview-heading { padding-top: 24px; padding-bottom: 24px; }
  .section-heading { align-items: start; }
  .section-heading > .mono { display: none; }
  .metric-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .metric-cell { padding: 10px 8px; border-bottom: 1px solid var(--line); }
  .metric-cell:nth-child(2n) { border-right: 0; }
  .metric-cell:nth-last-child(-n+2) { border-bottom: 0; }
  .metric-cell:nth-child(3) { border-right: 1px solid var(--line); }
  .context-meta { grid-template-columns: 1fr; }
  .feedback-heading { display: block; }
  .score-pills { margin-top: 12px; justify-content: flex-start; }
  .feedback-band { padding: 15px 16px; }
  blockquote { font-size: 14px; }
  .response-pane { padding: 16px 15px 19px; }
  .response-pane-heading { display: block; }
  .badge-row { margin-top: 8px; justify-content: flex-start; }
  .response-scores { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .response-score { padding-left: 7px; padding-right: 7px; }
  .round-actions { display: none; }
  .overview-summary { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .overview-summary .metric-cell:nth-child(2n) { border-right: 0; }
  .overview-summary .metric-cell:nth-child(3) { border-right: 1px solid var(--line); }
  .overview-summary .metric-cell { border-top: 1px solid var(--line); border-bottom: 0; }
  .overview-summary .metric-cell:first-child, .overview-summary .metric-cell:nth-child(2) { border-top: 0; }
  .outcome-segment span { display: none; }
}