:root {
  color-scheme: light;
  --paper: #f2eee5;
  --paper-deep: #e8e1d3;
  --ink: #24302c;
  --muted: #646e67;
  --terra: #a2542f;
  --sage: #dbe7df;
  --warning: #eaded2;
  --line: rgba(36, 48, 44, .14);
  --white-glass: rgba(255, 255, 255, .5);
  --serif: Georgia, "Noto Serif SC", "Songti SC", serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  --radius-s: .75rem;
  --radius-m: 1.1rem;
  --radius-l: 1.6rem;
  --shadow: 0 1.5rem 4rem rgba(61, 52, 39, .1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-block-start: 6rem;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.65;
}

a {
  color: inherit;
  text-underline-offset: .22em;
  text-decoration-thickness: .08em;
}

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

button {
  font: inherit;
}

h1,
h2,
h3,
p {
  margin-block-start: 0;
}

h1,
h2,
h3 {
  font-family: var(--serif);
}

h3 {
  margin-block-end: .55rem;
  font-size: 1.28rem;
  line-height: 1.28;
  font-weight: 600;
}

p,
li,
dd {
  max-width: 68ch;
}

.skip-link {
  position: fixed;
  inset-block-start: .75rem;
  inset-inline-start: 1rem;
  z-index: 100;
  padding: .55rem .8rem;
  border: 1px solid var(--ink);
  border-radius: var(--radius-s);
  background: var(--paper);
  color: var(--ink);
  font-weight: 750;
  text-decoration: none;
  transform: translateY(calc(-100% - 2rem));
  transition: transform 160ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header,
main {
  width: min(1120px, calc(100% - 2rem));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  inset-block-start: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding-block: 1rem;
  border-block-end: 1px solid var(--line);
  background: rgba(242, 238, 229, .92);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.wordmark,
.site-header > a {
  display: inline-flex;
  min-block-size: 2.75rem;
  align-items: center;
  flex: 0 0 auto;
  font-family: var(--serif);
  font-size: 1.06rem;
  font-weight: 700;
  letter-spacing: .02em;
  text-decoration: none;
}

.site-header nav {
  display: flex;
  gap: 1.1rem;
  align-items: center;
  margin-inline-start: auto;
  font-size: .875rem;
}

.site-header nav a {
  border-block-end: 1px solid transparent;
  color: var(--muted);
  text-decoration: none;
  transition: border-color 160ms ease, color 160ms ease;
}

.offline-badge {
  flex: 0 0 auto;
  padding: .3rem .65rem;
  border: 1px solid rgba(36, 48, 44, .2);
  border-radius: 999px;
  background: var(--sage);
  font-size: .72rem;
  font-weight: 750;
  letter-spacing: .02em;
  white-space: nowrap;
}

main {
  padding-block-end: 6rem;
}

main a:not(.button) {
  text-decoration-color: var(--terra);
  transition: color 160ms ease, text-decoration-thickness 160ms ease;
}

.hero {
  min-height: 72vh;
  display: grid;
  align-content: center;
  padding-block: clamp(5rem, 11vw, 9rem);
}

.eyebrow {
  margin-block-end: 0;
  color: var(--terra);
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .15em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 14ch;
  margin: .8rem 0 1.25rem;
  font-size: clamp(2.6rem, 7vw, 5.6rem);
  line-height: 1.06;
  letter-spacing: -.045em;
  font-weight: 500;
}

.hero-copy {
  max-width: 42rem;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.2rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-block-start: 1.8rem;
}

.button {
  display: inline-flex;
  min-height: 2.8rem;
  align-items: center;
  justify-content: center;
  padding: .7rem 1.2rem;
  border: 1px solid var(--ink);
  border-radius: 999px;
  text-decoration: none;
  font-weight: 750;
  transition: background-color 160ms ease, color 160ms ease, transform 160ms ease;
}

.button.primary {
  background: var(--ink);
  color: var(--paper);
}

.button.secondary {
  background: transparent;
}

.button:active {
  transform: translateY(1px);
}

.site-header a:active {
  color: var(--terra);
  text-decoration: underline;
}

main a:not(.button):active {
  color: var(--terra);
  text-decoration-thickness: .14em;
}

.offline-note {
  margin-block-start: 1rem;
  color: var(--muted);
  font-size: .84rem;
}

.proof-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  background: var(--line);
  box-shadow: var(--shadow);
}

.proof-strip article {
  padding: 1.4rem;
  background: var(--white-glass);
}

.proof-strip strong,
.proof-strip span {
  display: block;
}

.proof-strip strong {
  font: 500 clamp(1.8rem, 4vw, 2.8rem)/1 var(--serif);
  letter-spacing: -.025em;
}

.proof-strip span {
  margin-block-start: .5rem;
  color: var(--muted);
  font-size: .8rem;
}

.section-block {
  padding-block: clamp(4.5rem, 9vw, 8rem);
  border-block-end: 1px solid var(--line);
}

.section-block h2 {
  max-width: 18ch;
  margin-block: .75rem 1.2rem;
  font-size: clamp(2rem, 5vw, 4rem);
  line-height: 1.12;
  letter-spacing: -.03em;
  font-weight: 500;
}

.section-block > p:not(.eyebrow) {
  color: var(--muted);
}

.two-column {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-block-start: 2rem;
}

.two-column article,
.replay,
.standards-grid li,
.standards-grid > article {
  padding: 1.5rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: var(--white-glass);
}

.two-column article > :last-child,
.standards-grid article > :last-child {
  margin-block-end: 0;
}

.two-column p,
.two-column li,
.outputs-grid p {
  color: var(--muted);
}

.two-column ul {
  margin-block: .8rem 0;
  padding-inline-start: 1.25rem;
}

.two-column li + li {
  margin-block-start: .42rem;
}

.standards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: .75rem;
  margin-block: 2rem 0;
  padding: 0;
  list-style: none;
}

.standards-grid li {
  display: flex;
  min-height: 5.25rem;
  align-items: center;
  font-weight: 700;
}

.outputs-grid article {
  min-width: 0;
}

.replay {
  margin-block-start: 2rem;
  box-shadow: var(--shadow);
}

.replay-disclosure {
  width: fit-content;
  margin-block-start: 1rem;
  padding: .35rem .7rem;
  border-inline-start: .2rem solid var(--terra);
  background: var(--paper-deep);
  color: var(--ink);
  font-size: .76rem;
  font-weight: 800;
  letter-spacing: .04em;
}

.replay-tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: .5rem;
}

.replay-tabs button {
  min-height: 3rem;
  padding: .65rem .75rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  background: transparent;
  color: var(--ink);
  font: 700 .82rem var(--sans);
  cursor: pointer;
  transition: background-color 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.replay-tabs button[aria-selected="true"] {
  border: 2px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  font-weight: 800;
  box-shadow: inset 0 -.2rem 0 var(--terra);
}

.replay-tabs button:active {
  transform: translateY(1px);
}

.replay-panel {
  min-height: 20rem;
  margin-block-start: 1rem;
  padding: 1.5rem;
  border-radius: var(--radius-m);
  background: var(--paper-deep);
  overflow-wrap: anywhere;
}

.replay-panel > :last-child {
  margin-block-end: 0;
}

.replay-panel h3 {
  font-size: clamp(1.45rem, 3vw, 2rem);
}

.run-summary {
  width: fit-content;
  margin-block: 1rem 1.5rem;
  padding: .45rem .75rem;
  border: 1px solid rgba(36, 48, 44, .18);
  border-radius: 999px;
  background: var(--sage);
  color: var(--ink);
  font-size: .78rem;
  font-weight: 850;
  letter-spacing: .02em;
}

.stage-details {
  display: grid;
  gap: .65rem;
  margin-block: 1.5rem 0;
  padding: 0;
  list-style: none;
}

.stage-details li {
  padding: .75rem .9rem;
  border-inline-start: .2rem solid var(--terra);
  background: var(--white-glass);
}

.output-block {
  margin-block-start: 1.25rem;
  padding-block-start: 1.25rem;
  border-block-start: 1px solid var(--line);
}

.output-block h4 {
  margin-block-end: .7rem;
  color: var(--terra);
  font: 850 .76rem var(--sans);
  letter-spacing: .08em;
  text-transform: uppercase;
}

.message-copy {
  margin: 0;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  background: var(--white-glass);
  font-weight: 650;
  line-height: 1.85;
}

.document-sections {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
  margin: 0 0 1rem;
  padding: 0;
  list-style: none;
}

.document-sections li {
  padding: .3rem .55rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--white-glass);
  font-size: .74rem;
  font-weight: 750;
}

.document-excerpt {
  padding: 1rem;
  border-inline-start: .2rem solid var(--ink);
  background: var(--white-glass);
}

.document-excerpt h5 {
  margin-block: 1.1rem .35rem;
  font: 800 .8rem var(--sans);
}

.document-excerpt h5:first-child {
  margin-block-start: 0;
}

.document-excerpt p,
.document-excerpt ol,
.document-excerpt ul {
  margin-block: 0;
  color: var(--muted);
}

.document-excerpt ol,
.document-excerpt ul {
  padding-inline-start: 1.25rem;
}

.document-excerpt li + li {
  margin-block-start: .35rem;
}

.audio-fallback,
.transcript-summary {
  color: var(--muted);
  font-size: .88rem;
}

.transcript-summary {
  margin-block: .8rem 0;
  padding-inline-start: .8rem;
  border-inline-start: .15rem solid var(--terra);
}

.noscript-stages {
  display: grid;
  gap: .75rem;
}

.noscript-stages article {
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  background: var(--paper-deep);
}

.noscript-stages h3 {
  font-size: 1.25rem;
}

.noscript-stages h4 {
  margin-block: 1rem .35rem;
  color: var(--terra);
  font: 800 .78rem var(--sans);
}

.noscript-stages ul {
  padding-inline-start: 1.25rem;
}

.evidence-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: .75rem;
  margin-block: 2rem;
}

.evidence-grid article {
  display: grid;
  gap: .45rem;
  min-width: 0;
  padding: 1rem;
  border-block-start: .2rem solid var(--terra);
  background: var(--paper-deep);
}

.evidence-grid span {
  color: var(--muted);
  font-size: .74rem;
  font-weight: 750;
  letter-spacing: .05em;
}

.evidence-grid strong {
  overflow-wrap: anywhere;
  font-size: 1rem;
}

.replay noscript p {
  margin-block: 1rem 0;
  color: var(--muted);
  font-size: .88rem;
}

.audio-sample {
  width: 100%;
  max-width: 100%;
  margin-block-start: 1rem;
}

.dossier {
  max-width: 1120px;
  padding-block: clamp(4.5rem, 9vw, 8rem) 7rem;
}

.dossier-hero,
.dossier section {
  width: min(100%, 48rem);
}

.dossier-hero {
  padding-block-end: clamp(3.5rem, 7vw, 6rem);
}

.dossier-hero h1 {
  max-width: 12ch;
  margin-block: .75rem 1.25rem;
  font-size: clamp(2.8rem, 7vw, 5.4rem);
  line-height: 1.05;
  letter-spacing: -.045em;
  font-weight: 500;
}

.dossier-hero > p:last-child {
  max-width: 40rem;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.16rem);
}

.dossier section {
  padding-block: clamp(2.6rem, 5vw, 4.5rem);
  border-block-start: 1px solid var(--line);
}

.dossier section h2 {
  margin-block-end: 1rem;
  font-size: clamp(1.65rem, 3vw, 2.4rem);
  line-height: 1.2;
  font-weight: 550;
}

.dossier section > :last-child {
  margin-block-end: 0;
}

.dossier ol,
.dossier ul {
  margin-block: 1.25rem 0;
  padding-inline-start: 1.4rem;
}

.dossier li {
  padding-inline-start: .35rem;
}

.dossier li + li {
  margin-block-start: .65rem;
}

.dossier li::marker {
  color: var(--terra);
  font-weight: 800;
}

.dossier section:last-child li > a {
  display: inline-flex;
  min-block-size: 2.75rem;
  align-items: center;
}

.dossier dl {
  display: grid;
  grid-template-columns: minmax(9rem, .35fr) 1fr;
  margin: 1.5rem 0 0;
  border-block-start: 1px solid var(--line);
}

.dossier dt,
.dossier dd {
  margin: 0;
  padding-block: .9rem;
  border-block-end: 1px solid var(--line);
}

.dossier dt {
  padding-inline-end: 1rem;
  color: var(--terra);
  font-size: .78rem;
  font-weight: 850;
  letter-spacing: .05em;
}

.dossier dd {
  color: var(--muted);
  overflow-wrap: anywhere;
}

main:not(.dossier) > h1:first-child {
  max-width: 16ch;
  margin-block: clamp(4rem, 10vw, 8rem) 1rem;
  font-size: clamp(2.6rem, 7vw, 5rem);
  line-height: 1.06;
  letter-spacing: -.04em;
  font-weight: 500;
}

:focus-visible {
  outline: 3px solid var(--terra);
  outline-offset: 3px;
}

@media (hover: hover) {
  .wordmark:hover,
  .site-header > a:hover {
    color: var(--terra);
    text-decoration: underline;
  }

  .site-header nav a:hover {
    border-block-end-color: currentColor;
    color: var(--ink);
  }

  main a:not(.button):hover {
    color: var(--terra);
    text-decoration-thickness: .14em;
  }

  .button.primary:hover {
    background: var(--terra);
    transform: translateY(-1px);
  }

  .button.secondary:hover {
    background: var(--sage);
    transform: translateY(-1px);
  }

  .replay-tabs button:hover:not([aria-selected="true"]) {
    border-color: var(--ink);
    background: var(--sage);
    transform: translateY(-1px);
  }
}

@media (max-width: 1040px) {
  .site-header nav {
    gap: .75rem;
    font-size: .8rem;
  }

  .offline-badge {
    font-size: .68rem;
  }
}

@media (max-width: 760px) {
  html {
    scroll-padding-block-start: 4.5rem;
  }

  .site-header,
  main {
    width: min(100% - 1.25rem, 1120px);
  }

  .site-header {
    gap: .6rem;
    padding-block: .8rem;
  }

  .site-header nav {
    display: none;
  }

  .wordmark,
  .site-header > a {
    min-width: 0;
    font-size: .96rem;
  }

  .offline-badge {
    max-width: 55vw;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .hero {
    min-height: auto;
  }

  .hero h1,
  .dossier-hero h1 {
    overflow-wrap: anywhere;
  }

  .hero-actions {
    align-items: stretch;
  }

  .button {
    min-height: 3rem;
  }

  .proof-strip,
  .two-column,
  .standards-grid {
    grid-template-columns: 1fr;
  }

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

  .proof-strip article {
    min-width: 0;
  }

  .section-block {
    padding-block: 4rem;
  }

  .replay,
  .two-column article,
  .standards-grid li,
  .standards-grid > article {
    padding: 1.15rem;
  }

  .replay-tabs {
    grid-template-columns: repeat(2, 1fr);
  }

  .replay-tabs button {
    min-width: 0;
    min-height: 3.25rem;
    padding-inline: .45rem;
  }

  .replay-panel {
    min-height: 22rem;
    padding: 1.15rem;
  }

  .dossier dl {
    grid-template-columns: 1fr;
  }

  .dossier dt {
    padding-block-end: .2rem;
    border-block-end: 0;
  }

  .dossier dd {
    padding-block-start: .2rem;
  }
}

@media (max-width: 420px) {
  .hero-actions .button {
    width: 100%;
  }

  .offline-badge {
    padding-inline: .5rem;
    font-size: .64rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
  }
}