:root {
  --paper: #f1efe7;
  --paper-deep: #e4e0d4;
  --ink: #17231e;
  --muted: #657069;
  --line: #c8c8bd;
  --field: #0e6b4f;
  --field-dark: #074b38;
  --signal: #e85d33;
  --white: #fffdf7;
  --shadow: 0 20px 60px rgba(24, 35, 29, .08);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Noto Sans HK", sans-serif;
  min-height: 100vh;
}
button { font: inherit; }
button:focus-visible { outline: 3px solid var(--signal); outline-offset: 3px; }
[hidden] { display: none !important; }

.masthead {
  min-height: 70px;
  padding: 0 4vw;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--line);
  gap: 22px;
}
.brand {
  color: var(--ink);
  text-decoration: none;
  font: 750 21px/1 "Bricolage Grotesque", sans-serif;
  letter-spacing: -.04em;
}
.brand span { color: var(--signal); font-size: 12px; vertical-align: top; margin-left: 3px; }
.masthead p { color: var(--muted); margin: 0; font-size: 13px; }
.mode-nav { display: flex; gap: 4px; }
.mode-button {
  min-height: 40px;
  padding: 8px 12px;
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}
.mode-button.active { color: var(--white); background: var(--field); }
.clear-button {
  margin-left: auto;
  border: 0;
  border-bottom: 1px solid currentColor;
  background: transparent;
  color: var(--muted);
  min-height: 44px;
  cursor: pointer;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(220px, .7fr) minmax(340px, 1.15fr) minmax(380px, 1.35fr);
  min-height: calc(100vh - 71px);
}
.intro, .clue-panel, .results-panel { padding: clamp(28px, 4vw, 62px); }
.intro { border-right: 1px solid var(--line); container-type: inline-size; }
.eyebrow {
  margin: 0 0 22px;
  color: var(--field);
  font: 650 11px/1 "Bricolage Grotesque", sans-serif;
  letter-spacing: .16em;
}
h1, h2, h3 { font-family: "Bricolage Grotesque", "Noto Sans HK", sans-serif; text-wrap: balance; }
h1 { margin: 0; font-size: clamp(48px, 6vw, 92px); line-height: .92; letter-spacing: -.065em; }
.intro h1 { max-width: 100%; font-size: clamp(42px, 14cqw, 92px); overflow-wrap: normal; }
.latin-title { white-space: nowrap; }
.lede { margin: 40px 0 0; max-width: 28rem; color: var(--muted); line-height: 1.8; font-size: 15px; text-wrap: pretty; }

.clue-panel { background: var(--white); border-right: 1px solid var(--line); }
.selected-summary { display: flex; justify-content: space-between; gap: 16px; align-items: baseline; padding-bottom: 20px; border-bottom: 2px solid var(--ink); color: var(--muted); font-size: 12px; }
.selected-summary strong { color: var(--signal); font: 750 26px/1 "Bricolage Grotesque", sans-serif; }
.tri-state-help { margin: 14px 0 0; color: var(--muted); font-size: 11px; line-height: 1.65; }
.tri-state-help b { color: var(--ink); }
.evidence-summary { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; margin: 24px 0 0; }
.evidence-summary div { padding: 10px 11px; border: 1px solid var(--line); border-radius: 10px; background: rgba(255,255,255,.35); }
.evidence-summary dt { color: var(--muted); font-size: 9px; letter-spacing: .08em; }
.evidence-summary dd { margin: 3px 0 0; color: var(--field-dark); font: 700 17px/1 "Bricolage Grotesque"; }
.clue-group { border-bottom: 1px solid var(--line); }
.group-title { min-height: 68px; display: flex; justify-content: space-between; align-items: center; gap: 10px; margin: 0; cursor: pointer; list-style: none; }
.group-title::-webkit-details-marker { display: none; }
.group-title::before { content: "+"; color: var(--signal); font: 650 18px/1 "Bricolage Grotesque"; }
.clue-group[open] .group-title::before { content: "−"; }
.group-title h3 { margin: 0; font-size: 16px; letter-spacing: -.02em; }
.group-title span { color: var(--muted); font-size: 11px; }
.group-title .group-count { margin-left: auto; color: var(--field); font-weight: 600; }
.group-hint { min-width: 62px; text-align: right; }
.clue-group .clue-options { padding: 0 0 24px 28px; }
.clue-options { display: flex; flex-wrap: wrap; gap: 8px; }
.clue-chip {
  min-height: 44px;
  padding: 9px 13px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  border-radius: 2px;
  transition: border-color .15s, background .15s, color .15s, transform .15s;
}
.clue-chip span, .clue-chip small { display: block; }
.clue-chip small { margin-top: 3px; color: var(--muted); font-size: 9px; }
.clue-chip:hover { border-color: var(--field); transform: translateY(-1px); }
.clue-chip[data-state="present"] { background: var(--field); border-color: var(--field); color: white; }
.clue-chip[data-state="present"] small { color: rgba(255,255,255,.78); }
.clue-chip[data-state="absent"] { border-color: var(--signal); color: #9a3a22; background: rgba(232,93,51,.08); }
.clue-chip[data-state="absent"] span { text-decoration: line-through; text-decoration-thickness: 1px; }
.clue-chip[data-state="absent"] small { color: #9a3a22; }

.results-panel { background: var(--paper-deep); }
.results-heading { display: flex; align-items: end; justify-content: space-between; padding-bottom: 18px; border-bottom: 2px solid var(--ink); }
.results-heading .eyebrow { margin-bottom: 8px; }
.results-heading h2 { margin: 0; font-size: clamp(28px, 3vw, 44px); letter-spacing: -.045em; }
#result-count { color: var(--muted); font-size: 12px; }
.clue-insights { margin-top: 18px; }
.next-clues { margin: 18px 0 4px; padding: 14px; border: 1px solid rgba(14,107,79,.22); background: rgba(14,107,79,.055); }
.next-clues > p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.65; }
.next-clues-heading { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 10px; }
.next-clues-heading span { color: var(--field-dark); font-size: 12px; font-weight: 700; }
.next-clues-heading small { color: var(--muted); font-size: 10px; }
.next-clue-list { display: grid; gap: 7px; }
.next-clue-list button { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 10px; align-items: center; width: 100%; padding: 9px 10px; border: 0; background: rgba(255,255,255,.68); color: var(--ink); text-align: left; cursor: pointer; }
.next-clue-list button:hover, .next-clue-list button:focus-visible { outline: 2px solid var(--field); outline-offset: 1px; }
.next-clue-list b { font-size: 12px; }
.next-clue-list span { color: var(--muted); font-size: 10px; }
.clue-insight { border-bottom: 1px solid var(--line); }
.clue-insight summary { min-height: 48px; display: flex; align-items: center; justify-content: space-between; gap: 12px; cursor: pointer; list-style: none; font-size: 13px; font-weight: 600; }
.clue-insight summary::-webkit-details-marker { display: none; }
.clue-insight summary::before { content: "+"; color: var(--signal); font: 650 17px/1 "Bricolage Grotesque"; }
.clue-insight[open] summary::before { content: "−"; }
.clue-insight summary span { margin-right: auto; }
.state-badge { padding: 4px 6px; font-size: 10px; font-style: normal; font-weight: 600; }
.state-badge.present { color: var(--field-dark); background: rgba(14,107,79,.1); }
.state-badge.absent { color: #9a3a22; background: rgba(232,93,51,.09); }
.strength { padding: 4px 6px; font-size: 10px; font-weight: 600; color: var(--muted); background: rgba(255,255,255,.5); }
.strength.strong { color: var(--field-dark); background: rgba(14,107,79,.1); }
.strength.medium { color: #8a5916; background: rgba(174,111,24,.1); }
.clue-insight p { margin: 4px 0 12px; color: var(--ink); font-size: 13px; line-height: 1.7; }
.clue-insight dl { margin: 0 0 12px; font-size: 11px; color: var(--muted); }
.clue-insight dl div { display: grid; grid-template-columns: 52px 1fr; gap: 8px; margin-top: 6px; }
.clue-insight dt { color: var(--ink); font-weight: 600; }
.clue-insight dd { margin: 0; line-height: 1.55; }
.clue-insight a { color: var(--field); font-size: 11px; text-underline-offset: 3px; }
.clue-insight small { color: var(--muted); font-size: 10px; margin-left: 10px; }
.empty-state { padding: 60px 0; max-width: 340px; }
.empty-state span { color: var(--signal); font: 650 12px/1 "Bricolage Grotesque"; }
.empty-state h3 { margin: 14px 0 10px; font-size: 24px; }
.empty-state p { color: var(--muted); line-height: 1.8; font-size: 14px; }

.candidate { display: grid; grid-template-columns: 45px 1fr auto; gap: 16px; padding: 24px 0; border-bottom: 1px solid var(--line); animation: reveal .35s ease both; }
@keyframes reveal { from { opacity: 0; transform: translateY(7px); } }
.candidate-rank { color: var(--muted); font: 650 13px/1.2 "Bricolage Grotesque"; padding-top: 5px; }
.candidate-name { display: flex; align-items: baseline; gap: 9px; margin-bottom: 10px; }
.candidate-name h3 { margin: 0; font-size: 23px; letter-spacing: -.035em; }
.candidate-name span { color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: .08em; }
.reason-list { display: flex; flex-wrap: wrap; gap: 6px; }
.reason { background: rgba(255,255,255,.52); padding: 5px 7px; color: #405047; font-size: 11px; }
.reason.absent { color: #8a5916; background: rgba(174,111,24,.1); }
.reason.conflict { color: #9a3a22; background: rgba(232,93,51,.09); text-decoration: line-through; }
.score { text-align: right; min-width: 52px; }
.score strong { display: block; color: var(--field-dark); font: 750 25px/1 "Bricolage Grotesque"; }
.score span { color: var(--muted); font-size: 10px; }
.score small { display: block; margin-top: 4px; color: var(--muted); font-size: 9px; }
.confidence-bar { grid-column: 2 / 4; height: 3px; background: rgba(23,35,30,.1); }
.confidence-bar i { display: block; height: 100%; background: var(--field); transition: width .35s ease; }
.score-breakdown { margin-top: 12px; border-top: 1px solid rgba(23,35,30,.16); }
.score-breakdown summary { min-height: 38px; display: flex; align-items: center; gap: 8px; color: var(--field); font-size: 11px; cursor: pointer; }
.score-breakdown summary b { margin-left: auto; color: var(--ink); }
.breakdown-row { display: grid; grid-template-columns: 1fr auto 34px; gap: 10px; align-items: center; padding: 8px 0; border-top: 1px solid rgba(23,35,30,.1); font-size: 11px; }
.breakdown-row small { color: var(--muted); }
.breakdown-row b { text-align: right; color: var(--field); }
.breakdown-row.contradicted span, .breakdown-row.contradicted b { color: #9a3a22; }
.breakdown-row .data-mark { color: var(--field); font-style: normal; }
.confidence-control { display: flex; align-items: center; gap: 7px; margin: 10px 0 2px; }
.confidence-control span { color: var(--muted); font-size: 10px; }
.confidence-control button { min-height: 31px; padding: 5px 10px; border: 1px solid var(--line); border-radius: 999px; background: transparent; color: var(--muted); font: 600 10px/1 "Noto Sans HK"; cursor: pointer; }
.confidence-control button.active { border-color: var(--field); background: var(--field); color: #fff; }
.evidence-note { display: flex; justify-content: space-between; gap: 8px; margin-top: 8px; color: var(--muted); font-size: 9px; }
.evidence-note b { color: var(--ink); }
.no-match { padding: 45px 0; }
.no-match h3 { font-size: 24px; margin: 0 0 10px; }
.no-match p { color: var(--muted); line-height: 1.7; }

@media (max-width: 1050px) {
  .workspace { grid-template-columns: minmax(320px, .9fr) minmax(380px, 1.1fr); }
  .intro { grid-column: 1 / -1; display: grid; grid-template-columns: minmax(280px, .8fr) 1.2fr; gap: 18px 42px; align-items: end; border-right: 0; border-bottom: 1px solid var(--line); }
  .intro .eyebrow { grid-column: 1 / -1; margin-bottom: 0; }
  .intro h1 { font-size: clamp(42px, 6vw, 54px); }
  .intro .lede { margin: 0; }
  .clue-panel { border-right: 0; }
  .results-panel { border-left: 1px solid var(--line); }
}
@media (max-width: 720px) {
  .masthead { padding: 0 18px; }
  .mode-button { padding-inline: 9px; font-size: 12px; }
  .workspace { display: block; }
  .intro, .clue-panel, .results-panel { padding: 32px 20px; }
  .intro { display: block; border-right: 0; }
  h1 { font-size: 58px; }
  .intro h1 { font-size: clamp(48px, 14vw, 58px); }
  .lede { margin-top: 24px; }
  .selected-summary { position: sticky; top: 0; z-index: 3; background: var(--white); padding-top: 12px; }
  .candidate { grid-template-columns: 30px 1fr auto; gap: 10px; }
  .next-clue-list button { grid-template-columns: 1fr; gap: 3px; }
}

.quiz-workspace {
  display: grid;
  grid-template-columns: minmax(260px, .75fr) minmax(520px, 1.55fr);
  min-height: calc(100vh - 71px);
}
.quiz-intro { padding: clamp(34px, 5vw, 76px); border-right: 1px solid var(--line); }
.quiz-intro h1 { font-size: clamp(52px, 7vw, 102px); }
.study-modes { display: grid; grid-template-columns: repeat(2, 1fr); gap: 6px; margin-top: 30px; }
.study-mode { min-height: 46px; padding: 9px 12px; border: 1px solid var(--line); color: var(--ink); background: transparent; cursor: pointer; }
.study-mode.active { color: white; border-color: var(--field); background: var(--field); }
.study-mode span { display: inline-grid; min-width: 20px; min-height: 20px; place-items: center; margin-left: 3px; border-radius: 50%; color: inherit; background: rgba(255,255,255,.18); font-size: 10px; }
.training-selector { display: grid; gap: 6px; margin-top: 10px; }
.training-choice { padding: 12px; border: 1px solid var(--line); background: rgba(255,255,255,.32); color: var(--ink); text-align: left; cursor: pointer; }
.training-choice strong, .training-choice small { display: block; }
.training-choice strong { font-size: 13px; }
.training-choice small { margin-top: 4px; color: var(--muted); font-size: 10px; line-height: 1.5; }
.training-choice.active { border-color: var(--field); box-shadow: inset 3px 0 var(--field); }
.quiz-stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; margin: 48px 0 0; background: var(--line); border: 1px solid var(--line); }
.quiz-stats div { padding: 18px; background: var(--paper); }
.quiz-stats dt { color: var(--muted); font-size: 11px; }
.quiz-stats dd { margin: 8px 0 0; font: 750 28px/1 "Bricolage Grotesque", sans-serif; }
.quiz-card { padding: clamp(24px, 4vw, 64px); background: var(--white); }
.quiz-progress { display: flex; justify-content: space-between; padding-bottom: 14px; border-bottom: 2px solid var(--ink); color: var(--muted); font-size: 12px; }
.quiz-figure { margin: 24px 0 0; }
.quiz-figure img { display: block; width: 100%; height: clamp(260px, 45vw, 540px); object-fit: cover; background: var(--paper-deep); }
.quiz-figure figcaption { margin-top: 8px; color: var(--muted); font-size: 10px; line-height: 1.6; }
.quiz-figure a, .license-content a { color: var(--field); text-underline-offset: 2px; }
.quiz-body { max-width: 760px; margin-top: 32px; }
.quiz-kicker { margin: 0 0 8px; color: var(--signal); font-size: 11px; font-weight: 700; letter-spacing: .08em; }
.quiz-body h2 { margin: 0; font-size: clamp(25px, 3vw, 38px); line-height: 1.15; }
.quiz-options { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; margin-top: 24px; }
.quiz-option { min-height: 52px; border: 1px solid var(--line); background: var(--paper); cursor: pointer; text-align: left; padding: 12px 16px; }
.quiz-option:hover:not(:disabled) { border-color: var(--field); }
.quiz-option.correct { color: white; border-color: var(--field); background: var(--field); }
.quiz-option.wrong { color: white; border-color: var(--signal); background: var(--signal); }
.quiz-feedback { margin-top: 20px; padding: 18px; border-left: 4px solid var(--field); background: var(--paper); }
.quiz-feedback strong { font-family: "Bricolage Grotesque", sans-serif; font-size: 18px; }
.quiz-feedback span { margin-left: 9px; padding: 4px 6px; color: var(--field-dark); background: rgba(14,107,79,.1); font-size: 10px; }
.quiz-feedback p { margin: 10px 0 0; color: var(--muted); line-height: 1.7; font-size: 13px; }
.quiz-feedback small { display: block; margin-top: 10px; color: var(--field); font-weight: 600; }
.quiz-feedback .duel-contrast { padding-top: 10px; border-top: 1px solid var(--line); color: var(--ink); }
.next-button { margin-top: 18px; min-height: 48px; padding: 10px 18px; border: 0; color: white; background: var(--ink); cursor: pointer; }

.license-page { background: var(--white); }
.back-link { margin-left: auto; color: var(--field); font-size: 13px; }
.license-content { max-width: 1120px; margin: 0 auto; padding: clamp(50px, 8vw, 110px) 24px; }
.license-content h1 { max-width: 800px; }
#license-list { margin-top: 70px; border-top: 2px solid var(--ink); }
.license-item { display: grid; grid-template-columns: 260px 1fr; gap: 32px; padding: 28px 0; border-bottom: 1px solid var(--line); }
.license-item img { width: 100%; height: 180px; object-fit: cover; background: var(--paper); }
.license-item .eyebrow { margin-bottom: 7px; }
.license-item h2 { margin: 0 0 18px; font-size: 25px; }
.license-item dl { margin: 0; }
.license-item dl div { display: grid; grid-template-columns: 70px 1fr; gap: 12px; margin-top: 6px; font-size: 13px; }
.license-item dt { color: var(--muted); }
.license-item dd { margin: 0; }

@media (max-width: 820px) {
  .quiz-workspace { grid-template-columns: 1fr; }
  .quiz-intro { border-right: 0; border-bottom: 1px solid var(--line); }
  .quiz-figure img { height: min(72vw, 450px); }
}
@media (max-width: 560px) {
  .quiz-intro, .quiz-card { padding: 30px 20px; }
  .quiz-options { grid-template-columns: 1fr; }
  .license-item { grid-template-columns: 1fr; }
  .license-item img { height: 220px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation: none !important; transition: none !important; }
}

.learn-section {
  padding: clamp(64px, 8vw, 120px) max(5vw, 24px);
  background: var(--ink);
  color: var(--white);
}
.learn-intro { display: grid; grid-template-columns: .65fr 1.35fr; gap: clamp(28px, 6vw, 90px); align-items: start; }
.learn-intro .eyebrow { grid-column: 1 / -1; margin-bottom: 0; color: #76c9a9; }
.learn-intro h2 { margin: 0; max-width: 720px; font-size: clamp(38px, 5.5vw, 78px); line-height: 1; letter-spacing: -.055em; }
.learn-intro > p:last-child { margin: 0; max-width: 650px; color: #bdc6c1; font-size: 16px; line-height: 1.9; }
.learn-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: clamp(58px, 8vw, 110px); background: #405048; border: 1px solid #405048; }
.learn-grid article { padding: clamp(24px, 3vw, 46px); background: var(--ink); }
.learn-grid span { color: #76c9a9; font: 650 12px/1 "Bricolage Grotesque", sans-serif; }
.learn-grid h3 { margin: 24px 0 12px; font-size: 22px; }
.learn-grid p, .clue-index p { margin: 0; color: #aeb9b3; font-size: 14px; line-height: 1.8; }
.clue-index { display: grid; grid-template-columns: .65fr 1.35fr; gap: clamp(28px, 6vw, 90px); margin-top: clamp(56px, 8vw, 100px); padding-top: 34px; border-top: 1px solid #405048; }
.clue-index h2 { margin: 0; font-size: clamp(24px, 3vw, 38px); }
.clue-index p { max-width: 760px; }
.clue-index .method-note { grid-column: 2; font-size: 12px; }
.clue-index a { color: #76c9a9; text-underline-offset: 3px; }
.site-footer { display: flex; justify-content: space-between; gap: 24px; padding: 28px 5vw; background: #0c1612; color: #8e9b94; font-size: 12px; }
.site-footer a { color: var(--white); }
.site-footer p { margin: 0; }

@media (max-width: 720px) {
  .learn-intro, .clue-index { grid-template-columns: 1fr; }
  .learn-grid { grid-template-columns: 1fr; }
  .clue-index .method-note { grid-column: auto; }
  .site-footer { display: block; }
  .site-footer p { margin-top: 10px; }
}