:root {
  --paper: #f3efe5;
  --paper-bright: #fffdf6;
  --ink: #171713;
  --muted: #6a685f;
  --line: #c8c2b5;
  --accent: #ff5b36;
  --warning: #f4b943;
  --observed: #2f73d9;
  --confirmed: #21835a;
  --shadow: 8px 8px 0 var(--ink);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    linear-gradient(rgba(23, 23, 19, 0.035) 1px, transparent 1px),
    var(--paper);
  background-size: 100% 32px;
  line-height: 1.55;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

button,
input,
textarea {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

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

.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 100;
  background: var(--ink);
  color: #fff;
  padding: 10px 14px;
}

.skip-link:focus {
  top: 16px;
}

.shell {
  width: min(1180px, calc(100% - 40px));
  margin-inline: auto;
}

.site-header {
  min-height: 76px;
  border-bottom: 2px solid var(--ink);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 max(20px, calc((100vw - 1180px) / 2));
  background: rgba(243, 239, 229, 0.94);
  backdrop-filter: blur(12px);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.15rem;
  font-weight: 850;
  letter-spacing: -0.03em;
  text-decoration: none;
}

.wordmark-mark {
  width: 18px;
  height: 18px;
  border-radius: 50% 50% 50% 2px;
  background: var(--accent);
  border: 2px solid var(--ink);
  transform: rotate(-18deg);
}

.site-nav {
  display: flex;
  gap: 28px;
  font-size: 0.88rem;
  font-weight: 750;
}

.site-nav a {
  text-decoration: none;
}

.site-nav a[aria-current="page"] {
  text-decoration: underline;
  text-decoration-thickness: 2px;
}

.hero {
  padding-block: 76px 68px;
}

.hero-kicker,
.claim-topline {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.test-stamp {
  display: inline-flex;
  align-items: center;
  min-height: 27px;
  padding: 2px 9px;
  border: 2px solid var(--ink);
  background: var(--warning);
  box-shadow: 3px 3px 0 var(--ink);
  transform: rotate(-2deg);
  font-weight: 900;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(250px, 0.65fr);
  gap: clamp(48px, 8vw, 120px);
  align-items: end;
  margin-top: 34px;
}

h1,
h2,
p {
  margin-top: 0;
}

.hero h1,
.claim-header h1,
.submit-intro h1 {
  margin-bottom: 26px;
  font-size: clamp(3.1rem, 7.2vw, 6.8rem);
  line-height: 0.98;
  letter-spacing: -0.075em;
  font-weight: 900;
  text-wrap: balance;
}

.hero-deck {
  max-width: 760px;
  margin-bottom: 0;
  font-size: clamp(1.05rem, 1.6vw, 1.35rem);
  line-height: 1.7;
  color: #36352f;
}

.status-panel {
  min-height: 240px;
  padding: 24px;
  border: 2px solid var(--ink);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: var(--warning);
}

.status-panel--confirmed {
  background: #b8e5cc;
}

.status-panel--observed {
  background: #c4d9f8;
}

.status-label,
.status-time {
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.status-panel strong {
  font-size: clamp(2.7rem, 5vw, 4.5rem);
  line-height: 1;
  letter-spacing: -0.07em;
}

.direct-answer {
  max-width: 820px;
  margin: 18px 0 12px;
  font-size: clamp(1.35rem, 2.4vw, 2rem);
  font-weight: 850;
  line-height: 1.25;
  letter-spacing: -0.035em;
}

.evidence-strip {
  border-block: 2px solid var(--ink);
  padding-block: 70px 64px;
  background: var(--paper-bright);
}

.section-heading {
  margin-bottom: 28px;
}

.section-heading--wide {
  max-width: 650px;
}

.section-heading--compact {
  margin-bottom: 20px;
}

.eyebrow {
  margin-bottom: 10px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.section-heading h2,
.submit-callout h2,
.claim-section h2,
.claim-share h2 {
  margin-bottom: 10px;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1.06;
  letter-spacing: -0.055em;
}

.evidence-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border: 2px solid var(--ink);
}

.evidence-card {
  min-height: 235px;
  padding: 24px;
  border-right: 2px solid var(--ink);
  display: flex;
  flex-direction: column;
}

.evidence-card:last-child {
  border-right: 0;
}

.evidence-card__top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 36px;
}

.evidence-card__kind,
.evidence-card__weight {
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.evidence-card__weight {
  color: var(--muted);
}

.evidence-card p {
  margin: auto 0 20px;
  color: #37362f;
}

.evidence-card__source {
  width: fit-content;
  color: var(--ink);
  font-size: 0.82rem;
  font-weight: 800;
  text-underline-offset: 4px;
}

.history-section {
  padding-block: 72px;
}

.history-heading {
  margin-bottom: 34px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 28px;
}

.history-heading h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1.06;
  letter-spacing: -0.055em;
}

.scatter-scroll {
  max-width: 100%;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  scrollbar-color: var(--ink) var(--paper);
  border: 2px solid var(--ink);
  background: var(--paper-bright);
}

.scatter-plot {
  width: var(--plot-width);
  min-width: 100%;
  height: calc(var(--plot-height) + 90px);
  padding: 28px 24px 24px 66px;
}

.scatter-plot__canvas {
  position: relative;
  width: calc(var(--plot-width) - 100px);
  height: var(--plot-height);
  margin-top: 8px;
  border-left: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
}

.scatter-gridline {
  position: absolute;
  right: 0;
  bottom: calc(var(--grid-ratio) * 100%);
  left: 0;
  border-top: 1px solid #cec8bb;
}

.scatter-gridline em {
  position: absolute;
  right: calc(100% + 10px);
  top: -0.7em;
  width: 44px;
  color: var(--muted);
  font: 700 0.68rem ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  text-align: right;
}

.scatter-point {
  position: absolute;
  bottom: calc(var(--point-ratio) * 100%);
  left: calc(74px + var(--point-x) * 150px);
  color: var(--ink);
  text-decoration: none;
  transform: translate(-50%, 50%);
}

.scatter-point > span {
  width: 20px;
  height: 20px;
  border: 3px solid var(--ink);
  border-radius: 50%;
  display: block;
  background: var(--accent);
  transition: transform 120ms ease, background 120ms ease;
}

.scatter-point:hover > span,
.scatter-point:focus-visible > span {
  background: var(--warning);
  transform: scale(1.25);
}

.scatter-point strong {
  position: absolute;
  bottom: 27px;
  left: 50%;
  font: 850 0.78rem ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  transform: translateX(-50%);
}

.scatter-point time {
  position: absolute;
  top: calc(100% + 26px);
  left: 50%;
  width: 116px;
  color: var(--muted);
  font: 700 0.68rem ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  text-align: center;
  transform: translateX(-50%);
}

.chart-note {
  max-width: 820px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.65;
}


.action-row {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 34px;
}

.button,
.text-button {
  min-height: 48px;
  border: 2px solid var(--ink);
  padding: 11px 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  cursor: pointer;
  text-decoration: none;
  transition: transform 120ms ease, box-shadow 120ms ease;
}

.button:hover,
.text-button:hover {
  transform: translate(-2px, -2px);
  box-shadow: 4px 4px 0 var(--ink);
}

.button--primary {
  background: var(--accent);
}

.button--secondary {
  background: var(--paper-bright);
}

.button--dark {
  background: var(--ink);
  color: #fff;
}

.text-button {
  border-color: transparent;
  background: transparent;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.action-note {
  min-height: 1.5em;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.submit-callout {
  border-block: 2px solid var(--ink);
  background: var(--accent);
}

.submit-callout__inner {
  min-height: 280px;
  padding-block: 56px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 32px;
}

.submit-callout h2 {
  max-width: 700px;
  margin-bottom: 0;
}

.site-footer {
  min-height: 130px;
  padding-block: 34px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  color: var(--muted);
  font-size: 0.86rem;
}

.claim-page {
  padding-block: 40px 90px;
}

.claim-topline {
  justify-content: space-between;
  padding-bottom: 28px;
  border-bottom: 2px solid var(--ink);
}

.claim-header {
  display: grid;
  grid-template-columns: 1.6fr 0.6fr;
  gap: clamp(40px, 8vw, 110px);
  align-items: end;
  padding-block: 70px;
}

.claim-header h1 {
  font-size: clamp(2.8rem, 6.2vw, 6rem);
}

.claim-header blockquote {
  margin: 0;
  padding-left: 18px;
  border-left: 5px solid var(--accent);
  max-width: 820px;
  font-size: 1.16rem;
  color: var(--muted);
}

.verdict-card {
  padding: 22px;
  border: 2px solid var(--ink);
  background: var(--warning);
  box-shadow: var(--shadow);
}

.verdict-card--confirmed { background: #b8e5cc; }
.verdict-card--observed { background: #c4d9f8; }

.verdict-card span {
  display: block;
  font-size: 0.74rem;
  font-weight: 800;
}

.verdict-card strong {
  display: block;
  margin-block: 35px;
  font-size: clamp(2.5rem, 4vw, 4rem);
  line-height: 1;
  letter-spacing: -0.06em;
}

.verdict-card p {
  margin-bottom: 0;
  font-size: 0.82rem;
}

.claim-section {
  display: grid;
  grid-template-columns: 70px 1fr;
  gap: 25px;
  padding-block: 60px;
  border-top: 2px solid var(--ink);
}

.section-number {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.8rem;
  font-weight: 800;
}

.assessment .lead {
  max-width: 890px;
  font-size: clamp(1.25rem, 2.25vw, 1.8rem);
  line-height: 1.55;
}

.scope-note {
  max-width: 890px;
  margin-top: 34px;
  padding: 22px;
  border: 1px solid var(--line);
  background: rgba(255, 253, 246, 0.65);
}

.scope-note p {
  margin: 8px 0 0;
  color: var(--muted);
}

.ledger {
  border-top: 2px solid var(--ink);
}

.ledger-item {
  display: grid;
  grid-template-columns: 150px 1fr 160px;
  gap: 28px;
  padding-block: 25px;
  border-bottom: 1px solid var(--line);
}

.ledger-item__kind,
.ledger-item__meta {
  font-size: 0.78rem;
  color: var(--muted);
}

.ledger-item__kind strong,
.ledger-item__meta strong {
  display: block;
  color: var(--ink);
}

.ledger-item__body p {
  margin-bottom: 10px;
}

.ledger-item__body a {
  font-size: 0.88rem;
  font-weight: 750;
}

.timeline {
  margin: 0;
  padding: 0;
  list-style: none;
}

.timeline li {
  display: grid;
  grid-template-columns: 190px 100px 1fr;
  gap: 24px;
  padding-block: 20px;
  border-bottom: 1px solid var(--line);
}

.timeline time,
.timeline strong {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.78rem;
}

.claim-share {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 28px 55px;
  align-items: center;
  margin-top: 40px;
  padding: 36px;
  border: 2px solid var(--ink);
  background: var(--paper-bright);
  box-shadow: var(--shadow);
}

.claim-share p {
  color: var(--muted);
}

.qr-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 9px;
}

.qr-block img {
  border: 1px solid var(--line);
  background: #fff;
}

.qr-block code {
  font-size: 0.67rem;
}

.claim-share__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.claim-share .action-note {
  align-self: end;
}

.submit-page {
  padding-block: 70px 100px;
}

.submit-intro {
  display: grid;
  grid-template-columns: 1.45fr 0.55fr;
  gap: 80px;
  align-items: end;
  padding-bottom: 58px;
  border-bottom: 2px solid var(--ink);
}

.submit-intro h1 {
  margin-bottom: 0;
}

.submit-intro > p {
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 1.05rem;
}

.submission-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 34px;
  padding-top: 46px;
}

.form-field--full,
.form-submit,
.form-result {
  grid-column: 1 / -1;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.form-field label {
  display: flex;
  justify-content: space-between;
  font-weight: 850;
}

.form-field label span,
.form-field small {
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 500;
}

.form-field input,
.form-field textarea {
  width: 100%;
  border: 2px solid var(--ink);
  border-radius: 0;
  padding: 15px;
  background: var(--paper-bright);
  color: var(--ink);
  resize: vertical;
}

.form-field input:focus,
.form-field textarea:focus {
  background: #fff;
}

.trap-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.form-submit {
  display: flex;
  align-items: center;
  gap: 20px;
  padding-top: 10px;
}

.form-submit p {
  margin: 0;
  color: var(--muted);
  font-size: 0.83rem;
}

.form-result {
  padding: 18px;
  border: 2px solid var(--ink);
  background: #b8e5cc;
}

.form-result[data-state="error"] {
  background: #ffd0c6;
}

.not-found {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
}

.not-found h1 {
  max-width: 800px;
  margin-bottom: 18px;
  font-size: clamp(3rem, 8vw, 7rem);
  line-height: 0.95;
  letter-spacing: -0.07em;
}

@media (max-width: 820px) {
  .hero-grid,
  .claim-header,
  .submit-intro {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-block: 52px;
  }

  .status-panel {
    min-height: 190px;
  }

  .evidence-grid {
    grid-template-columns: 1fr;
  }

  .evidence-card {
    min-height: auto;
    border-right: 0;
    border-bottom: 2px solid var(--ink);
  }

  .evidence-card:last-child {
    border-bottom: 0;
  }

  .evidence-card__top {
    margin-bottom: 20px;
  }

  .history-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .claim-topline {
    flex-wrap: wrap;
    justify-content: flex-start;
  }

  .ledger-item {
    grid-template-columns: 120px 1fr;
  }

  .ledger-item__meta {
    grid-column: 2;
  }

  .claim-share {
    grid-template-columns: 1fr;
  }

  .qr-block {
    align-items: flex-start;
  }
}

@media (max-width: 580px) {
  .shell {
    width: min(100% - 28px, 1180px);
  }

  .site-header {
    min-height: 66px;
    padding-inline: 14px;
  }

  .site-nav {
    gap: 15px;
    font-size: 0.78rem;
  }

  .wordmark {
    font-size: 1rem;
  }

  .wordmark-mark {
    width: 15px;
    height: 15px;
  }

  .hero h1,
  .claim-header h1,
  .submit-intro h1 {
    font-size: clamp(2.65rem, 14vw, 4.4rem);
  }

  .hero-kicker {
    flex-wrap: wrap;
  }

  .action-row,
  .claim-share__actions,
  .form-submit {
    align-items: stretch;
    flex-direction: column;
  }

  .button,
  .text-button {
    width: 100%;
  }

  .submit-callout__inner,
  .site-footer {
    flex-direction: column;
    align-items: stretch;
  }

  .claim-section {
    grid-template-columns: 1fr;
    gap: 5px;
  }

  .section-number {
    color: var(--muted);
  }

  .ledger-item,
  .timeline li {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .ledger-item__meta {
    grid-column: 1;
  }

  .claim-share {
    padding: 24px;
  }

  .submission-form {
    grid-template-columns: 1fr;
  }

  .form-field,
  .form-field--full,
  .form-submit,
  .form-result {
    grid-column: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}