:root {
  --paper: #f2efe6;
  --paper-deep: #e8e3d7;
  --ink: #1d211c;
  --muted: #686d64;
  --line: rgba(29, 33, 28, 0.18);
  --acid: #f1ff83;
  --coral: #ed6547;
  --mint: #bcd8cc;
  --cream: #faf8f2;
  --serif: "Instrument Serif", Georgia, serif;
  --sans: "DM Sans", Arial, sans-serif;
  --mono: "DM Mono", monospace;
  --shell: min(1240px, calc(100vw - 64px));
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 92% 8%, rgba(188, 216, 204, 0.35), transparent 29rem),
    var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

button,
textarea {
  color: inherit;
  font: inherit;
}

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

button {
  cursor: pointer;
}

a {
  color: inherit;
}

::selection {
  background: var(--acid);
  color: var(--ink);
}

.shell {
  width: var(--shell);
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 8px;
  left: 8px;
  padding: 10px 14px;
  background: var(--ink);
  color: white;
  transform: translateY(-150%);
}

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 82px;
  padding: 0 max(32px, calc((100vw - 1240px) / 2));
  border-bottom: 1px solid var(--line);
  background: rgba(242, 239, 230, 0.88);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  justify-self: start;
  gap: 10px;
  width: max-content;
  color: var(--ink);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-decoration: none;
}

.brand-mark {
  display: inline-block;
  width: 14px;
  height: 14px;
  border-radius: 50% 50% 50% 2px;
  background: var(--coral);
  transform: rotate(-45deg);
}

.brand small {
  margin-left: 4px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 3px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(250, 248, 242, 0.62);
}

.nav-link {
  min-width: 94px;
  padding: 8px 16px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.03em;
  transition: background 180ms var(--ease), color 180ms var(--ease);
}

.nav-link:hover {
  background: rgba(29, 33, 28, 0.06);
}

.nav-link.is-active {
  background: var(--ink);
  color: var(--cream);
}

.source-link {
  justify-self: end;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.02em;
  text-underline-offset: 4px;
}

.source-link span {
  color: var(--coral);
}

.view {
  min-height: calc(100vh - 82px);
}

.view[hidden] {
  display: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(270px, 1fr);
  gap: 80px;
  padding-top: clamp(72px, 9vw, 126px);
  padding-bottom: 66px;
}

.eyebrow,
.step-label {
  margin: 0 0 24px;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--muted);
}

.eyebrow span {
  width: 34px;
  height: 1px;
  background: var(--coral);
}

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

.hero-copy h1,
.section-hero h1 {
  max-width: 920px;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(74px, 9vw, 142px);
  font-weight: 400;
  letter-spacing: -0.055em;
  line-height: 0.79;
}

.hero-copy h1 em,
.section-hero h1 em {
  color: var(--coral);
  font-weight: 400;
}

.hero-intro {
  max-width: 590px;
  margin: 42px 0 0 clamp(0px, 9vw, 130px);
  color: #484d45;
  font-size: clamp(16px, 1.5vw, 20px);
  line-height: 1.65;
}

.hero-aside {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 34px;
  min-height: 350px;
  padding-left: 28px;
  border-left: 1px solid var(--line);
}

.edition-note {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9px;
  text-transform: uppercase;
}

.hero-score {
  margin-top: auto;
}

.score-value {
  display: block;
  margin-bottom: 8px;
  font-family: var(--serif);
  font-size: clamp(64px, 7vw, 98px);
  letter-spacing: -0.055em;
  line-height: 0.9;
}

.score-value sup,
.metric-ribbon sup {
  color: var(--coral);
  font-family: var(--sans);
  font-size: 0.28em;
  font-weight: 600;
  vertical-align: top;
}

.hero-score p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.hero-seal {
  position: relative;
  width: 88px;
  height: 88px;
  margin-left: auto;
}

.hero-seal svg {
  width: 100%;
  height: 100%;
  animation: rotate 20s linear infinite;
}

.hero-seal text {
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.1em;
}

.hero-seal > span {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--coral);
  font-family: var(--serif);
  font-size: 33px;
  font-style: italic;
}

.analysis-wrap {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  overflow: hidden;
  min-height: 620px;
  border: 1px solid var(--ink);
  border-radius: 4px;
  background: var(--cream);
  box-shadow: 18px 24px 0 var(--mint);
}

.analysis-card,
.result-card {
  padding: clamp(28px, 4vw, 56px);
}

.analysis-card {
  border-right: 1px solid var(--ink);
}

.result-card {
  background: var(--ink);
  color: var(--cream);
}

.card-heading,
.result-topline,
.panel-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
}

.step-label {
  margin-bottom: 13px;
  color: var(--muted);
}

.card-heading h2,
.empty-result h2,
.panel-heading h2,
.verdict-lockup h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(38px, 4vw, 56px);
  font-weight: 400;
  letter-spacing: -0.035em;
  line-height: 1;
}

.model-status {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 4px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9px;
  text-transform: uppercase;
}

.model-status span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #d09b37;
  box-shadow: 0 0 0 4px rgba(208, 155, 55, 0.15);
}

.model-status.is-ready span {
  background: #3d9d6b;
  box-shadow: 0 0 0 4px rgba(61, 157, 107, 0.14);
}

.model-status.is-error span {
  background: var(--coral);
}

.example-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 9px;
  margin: 44px 0 18px;
}

.example-row > span {
  margin-right: 5px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9px;
  text-transform: uppercase;
}

.text-chip {
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  font-size: 11px;
  transition: border-color 180ms var(--ease), background 180ms var(--ease);
}

.text-chip:hover {
  border-color: var(--ink);
  background: var(--paper);
}

.editor-shell {
  overflow: hidden;
  border: 1px solid var(--line);
  background: white;
  transition: border-color 180ms var(--ease), box-shadow 180ms var(--ease);
}

.editor-shell:focus-within {
  border-color: var(--ink);
  box-shadow: 0 0 0 3px rgba(29, 33, 28, 0.08);
}

textarea {
  display: block;
  width: 100%;
  min-height: 250px;
  padding: 24px;
  resize: vertical;
  border: 0;
  outline: 0;
  background: white;
  font-family: var(--serif);
  font-size: 24px;
  line-height: 1.45;
}

textarea::placeholder {
  color: #a3a49e;
}

.editor-meta {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9px;
  text-transform: uppercase;
}

.form-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 18px;
}

.clear-button {
  padding: 10px 0;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 12px;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.analyse-button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 34px;
  min-width: 206px;
  padding: 15px 18px;
  border: 1px solid var(--ink);
  background: var(--acid);
  font-size: 12px;
  font-weight: 600;
  transition: transform 180ms var(--ease), box-shadow 180ms var(--ease), opacity 180ms var(--ease);
}

.analyse-button:hover:not(:disabled) {
  transform: translate(-3px, -3px);
  box-shadow: 4px 4px 0 var(--ink);
}

.analyse-button:disabled {
  cursor: not-allowed;
  opacity: 0.38;
}

.empty-result {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
}

.empty-number {
  color: var(--acid);
  font-family: var(--serif);
  font-size: 170px;
  font-style: italic;
  line-height: 0.75;
}

.empty-result .step-label,
.result-topline .step-label {
  color: #a9ada4;
}

.empty-result h2 {
  color: var(--cream);
}

.empty-result p:last-child {
  max-width: 350px;
  margin: 24px 0 0;
  color: #a9ada4;
  font-size: 13px;
}

.result-content {
  animation: result-in 420ms var(--ease) both;
}

.result-content[hidden] {
  display: none;
}

.result-badge {
  padding: 7px 11px;
  border: 1px solid rgba(250, 248, 242, 0.26);
  border-radius: 999px;
  color: #c7cac3;
  font-family: var(--mono);
  font-size: 9px;
  text-transform: uppercase;
}

.verdict-lockup {
  padding: 64px 0 44px;
  border-bottom: 1px solid rgba(250, 248, 242, 0.18);
}

.verdict-kicker {
  margin-bottom: 5px;
  color: #a9ada4;
  font-size: 13px;
}

.verdict-lockup h2 {
  color: var(--acid);
  font-size: clamp(66px, 7vw, 104px);
}

.result-card.is-fake .verdict-lockup h2 {
  color: #ff856e;
}

.verdict-lockup > p:last-child {
  max-width: 410px;
  margin: 18px 0 0;
  color: #c3c6bf;
  font-size: 12px;
  line-height: 1.7;
}

.score-block {
  padding: 30px 0;
  border-bottom: 1px solid rgba(250, 248, 242, 0.18);
}

.score-meta {
  display: flex;
  justify-content: space-between;
  color: #9fa39b;
  font-family: var(--mono);
  font-size: 8px;
  text-transform: uppercase;
}

.score-meta b {
  color: var(--cream);
  font-weight: 400;
}

.score-track {
  position: relative;
  height: 5px;
  margin-top: 13px;
  background: linear-gradient(90deg, var(--mint), var(--paper-deep) 50%, var(--coral));
}

.score-threshold {
  position: absolute;
  top: -4px;
  bottom: -4px;
  left: 50%;
  width: 1px;
  background: var(--cream);
  opacity: 0.65;
}

.score-pin {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 13px;
  height: 13px;
  border: 3px solid var(--ink);
  border-radius: 50%;
  background: var(--acid);
  box-shadow: 0 0 0 1px var(--cream);
  transform: translate(-50%, -50%);
  transition: left 500ms var(--ease);
}

.result-card.is-fake .score-pin {
  background: var(--coral);
}

.score-block > p {
  margin: 11px 0 0;
  color: #858a81;
  font-size: 9px;
}

.signal-block {
  padding-top: 27px;
}

.signal-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.signal-heading h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: 21px;
  font-weight: 400;
}

.signal-heading span {
  color: #858a81;
  font-family: var(--mono);
  font-size: 8px;
  text-transform: uppercase;
}

.signal-list {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 15px;
}

.signal-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border: 1px solid rgba(250, 248, 242, 0.18);
  color: #d2d4ce;
  font-family: var(--mono);
  font-size: 9px;
}

.signal-pill i {
  color: var(--mint);
  font-style: normal;
}

.signal-pill.is-fake i {
  color: #ff856e;
}

.privacy-strip {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 36px;
  align-items: center;
  margin-top: 58px;
  margin-bottom: 120px;
  padding: 17px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 9px;
  text-transform: uppercase;
}

.privacy-strip p {
  margin: 0;
  color: var(--muted);
  text-align: center;
}

.privacy-strip > span:first-child::before {
  content: "●";
  margin-right: 8px;
  color: #3d9d6b;
}

.section-hero {
  padding: clamp(78px, 10vw, 140px) 0 80px;
  border-bottom: 1px solid var(--ink);
}

.section-hero h1 {
  font-size: clamp(70px, 8.4vw, 126px);
}

.section-deck {
  display: grid;
  grid-template-columns: minmax(280px, 600px) auto;
  justify-content: space-between;
  gap: 40px;
  align-items: end;
  margin-top: 48px;
}

.section-deck > p {
  margin: 0 0 0 clamp(0px, 7vw, 100px);
  color: var(--muted);
  font-size: 18px;
  line-height: 1.65;
}

.section-index {
  color: var(--coral);
  font-family: var(--serif);
  font-size: 72px;
  font-style: italic;
  line-height: 0.7;
}

.metric-ribbon {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-bottom: 1px solid var(--ink);
}

.metric-ribbon article {
  padding: 32px;
  border-right: 1px solid var(--line);
}

.metric-ribbon article:first-child {
  padding-left: 0;
}

.metric-ribbon article:last-child {
  border-right: 0;
}

.metric-ribbon span,
.metric-ribbon p {
  display: block;
  margin: 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 8px;
  text-transform: uppercase;
}

.metric-ribbon strong {
  display: block;
  margin: 7px 0;
  font-family: var(--serif);
  font-size: clamp(40px, 4vw, 62px);
  font-weight: 400;
  letter-spacing: -0.04em;
}

.benchmark-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 24px;
  margin-top: 72px;
}

.benchmark-panel,
.confusion-panel,
.formula-card,
.code-card {
  padding: clamp(28px, 4vw, 50px);
  border: 1px solid var(--ink);
  background: var(--cream);
}

.panel-heading > span,
.panel-heading > p {
  margin: 5px 0 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 8px;
  text-transform: uppercase;
}

.bar-chart {
  display: grid;
  gap: 22px;
  margin-top: 50px;
}

.bar-row {
  display: grid;
  grid-template-columns: minmax(150px, 1.4fr) 3fr auto;
  gap: 16px;
  align-items: center;
}

.bar-label strong,
.bar-label span {
  display: block;
}

.bar-label strong {
  font-size: 12px;
  font-weight: 600;
}

.bar-label span {
  color: var(--muted);
  font-size: 9px;
}

.bar-track {
  height: 10px;
  background: var(--paper-deep);
}

.bar-fill {
  display: block;
  width: var(--width);
  height: 100%;
  background: var(--mint);
  transform: scaleX(0);
  transform-origin: left;
  animation: fill 700ms var(--ease) forwards;
  animation-delay: var(--delay);
}

.bar-row.is-best .bar-fill {
  background: var(--coral);
}

.bar-value {
  font-family: var(--mono);
  font-size: 11px;
}

.insight-panel {
  display: flex;
  flex-direction: column;
  background: var(--acid);
}

.insight-panel blockquote {
  margin: 12px 0 28px;
  font-family: var(--serif);
  font-size: clamp(35px, 4vw, 54px);
  line-height: 1;
}

.insight-panel blockquote em {
  color: var(--coral);
}

.insight-panel > p:not(.step-label) {
  color: #454a42;
  font-size: 12px;
  line-height: 1.7;
}

.ratio-visual {
  display: grid;
  gap: 12px;
  margin-top: auto;
  padding-top: 38px;
}

.ratio-visual div {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px 12px;
  align-items: center;
  font-family: var(--mono);
  font-size: 8px;
  text-transform: uppercase;
}

.ratio-visual span {
  grid-column: 1 / -1;
  width: var(--size);
  min-width: 5px;
  height: 5px;
  background: var(--ink);
}

.ratio-visual b {
  font-weight: 500;
}

.ratio-visual em {
  font-style: normal;
}

.confusion-panel {
  margin: 24px 0 120px;
}

.confusion-layout {
  display: grid;
  grid-template-columns: 1.4fr 0.6fr;
  gap: clamp(40px, 7vw, 100px);
  align-items: center;
  margin-top: 50px;
}

.confusion-matrix {
  display: grid;
  grid-template-columns: 88px repeat(2, minmax(120px, 1fr));
  grid-template-rows: 32px repeat(2, 132px);
}

.matrix-axis {
  display: grid;
  place-items: center;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 8px;
  text-align: center;
  text-transform: uppercase;
}

.matrix-axis.vertical {
  padding-right: 12px;
  text-align: right;
}

.matrix-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 3px solid var(--cream);
  background: var(--mint);
}

.matrix-cell.strong {
  background: var(--ink);
  color: white;
}

.matrix-cell.mid {
  background: #abc8bc;
}

.matrix-cell.light {
  background: #dbe8e2;
}

.matrix-cell strong {
  font-family: var(--serif);
  font-size: 38px;
  font-weight: 400;
}

.matrix-cell span {
  font-family: var(--mono);
  font-size: 8px;
  text-transform: uppercase;
}

.error-note {
  position: relative;
  padding-left: 30px;
  border-left: 1px solid var(--line);
}

.note-mark {
  position: absolute;
  top: -28px;
  left: 26px;
  color: var(--coral);
  font-family: var(--serif);
  font-size: 48px;
}

.error-note h3 {
  margin: 20px 0;
  font-family: var(--serif);
  font-size: 29px;
  font-weight: 400;
  line-height: 1.1;
}

.error-note p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.75;
}

.method-flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 24px;
  align-items: center;
  padding: 70px 0;
  border-bottom: 1px solid var(--ink);
}

.method-flow article {
  min-height: 170px;
}

.method-flow article > span,
.honesty-index {
  color: var(--coral);
  font-family: var(--mono);
  font-size: 10px;
}

.method-flow h2 {
  margin: 28px 0 12px;
  font-family: var(--serif);
  font-size: 44px;
  font-weight: 400;
}

.method-flow p {
  max-width: 270px;
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.7;
}

.flow-arrow {
  color: var(--coral);
  font-size: 24px;
}

.method-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin: 72px 0 24px;
}

.formula-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 390px;
  background: var(--acid);
}

.formula {
  max-width: 530px;
  font-family: var(--serif);
  font-size: clamp(31px, 4vw, 48px);
  letter-spacing: -0.02em;
}

.formula span,
.formula small {
  font-size: 0.62em;
}

.formula-card > p:last-child {
  max-width: 470px;
  margin: 50px 0 0;
  color: #454a42;
  font-size: 12px;
}

.code-card {
  min-width: 0;
  background: var(--ink);
  color: var(--cream);
}

.code-top {
  display: flex;
  justify-content: space-between;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(250, 248, 242, 0.15);
  color: #9fa39b;
  font-family: var(--mono);
  font-size: 9px;
  text-transform: uppercase;
}

.code-card pre {
  overflow-x: auto;
  margin: 66px 0 0;
  white-space: pre-wrap;
}

.code-card code {
  color: #d4d8d0;
  font-family: var(--mono);
  font-size: clamp(11px, 1.2vw, 15px);
  line-height: 1.85;
}

.code-card code span {
  color: var(--acid);
}

.honesty-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-bottom: 120px;
  border: 1px solid var(--ink);
}

.honesty-grid article {
  padding: 34px;
  border-right: 1px solid var(--ink);
}

.honesty-grid article:last-child {
  border-right: 0;
}

.honesty-grid h3 {
  margin: 54px 0 14px;
  font-family: var(--serif);
  font-size: 27px;
  font-weight: 400;
}

.honesty-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.7;
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 30px;
  align-items: center;
  min-height: 112px;
  border-top: 1px solid var(--ink);
}

.site-footer p {
  margin: 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 8px;
  text-transform: uppercase;
}

.site-footer p:last-child {
  justify-self: end;
}

.site-footer a {
  text-underline-offset: 3px;
}

.footer-brand small {
  display: none;
}

.reveal {
  animation: reveal 650ms var(--ease) both;
}

.reveal-delay {
  animation-delay: 90ms;
}

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

@keyframes reveal {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes result-in {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes rotate {
  to { transform: rotate(360deg); }
}

@keyframes fill {
  to { transform: scaleX(1); }
}

@media (max-width: 980px) {
  :root {
    --shell: min(100% - 40px, 860px);
  }

  .site-header {
    grid-template-columns: 1fr auto;
    padding-inline: 20px;
  }

  .site-nav {
    position: fixed;
    z-index: 30;
    right: 16px;
    bottom: 16px;
    left: 16px;
    justify-content: center;
    background: rgba(250, 248, 242, 0.94);
    box-shadow: 0 10px 30px rgba(29, 33, 28, 0.17);
    backdrop-filter: blur(18px);
  }

  .nav-link {
    min-width: min(28vw, 150px);
  }

  .source-link {
    grid-column: 2;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 54px;
  }

  .hero-aside {
    display: grid;
    grid-template-columns: 1fr auto;
    min-height: 0;
  }

  .edition-note {
    grid-column: 1 / -1;
  }

  .analysis-wrap,
  .benchmark-grid,
  .confusion-layout {
    grid-template-columns: 1fr;
  }

  .analysis-card {
    border-right: 0;
    border-bottom: 1px solid var(--ink);
  }

  .result-card {
    min-height: 560px;
  }

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

  .metric-ribbon article:nth-child(2) {
    border-right: 0;
  }

  .metric-ribbon article:nth-child(-n+2) {
    border-bottom: 1px solid var(--line);
  }

  .metric-ribbon article:nth-child(3) {
    padding-left: 0;
  }

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

  .site-footer {
    grid-template-columns: 1fr auto;
    margin-bottom: 82px;
  }

  .site-footer p:nth-child(2) {
    display: none;
  }
}

@media (max-width: 680px) {
  :root {
    --shell: calc(100% - 28px);
  }

  .site-header {
    min-height: 70px;
    padding-inline: 14px;
  }

  .brand small,
  .source-link {
    display: none;
  }

  .brand {
    font-size: 13px;
    letter-spacing: 0.05em;
  }

  .hero-grid {
    padding-top: 62px;
  }

  .hero-copy h1,
  .section-hero h1 {
    font-size: clamp(58px, 20vw, 86px);
    line-height: 0.86;
  }

  .hero-intro,
  .section-deck > p {
    margin-left: 0;
  }

  .hero-aside {
    padding-left: 18px;
  }

  .analysis-wrap {
    width: calc(100% - 20px);
    box-shadow: 10px 14px 0 var(--mint);
  }

  .analysis-card,
  .result-card,
  .benchmark-panel,
  .confusion-panel,
  .formula-card,
  .code-card {
    padding: 25px 20px;
  }

  .card-heading,
  .panel-heading {
    display: block;
  }

  .model-status {
    margin-top: 18px;
  }

  textarea {
    min-height: 220px;
    padding: 18px;
    font-size: 21px;
  }

  .editor-meta span:first-child {
    display: none;
  }

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

  .analyse-button {
    min-width: 190px;
  }

  .privacy-strip {
    grid-template-columns: 1fr;
    gap: 7px;
    text-align: center;
  }

  .privacy-strip p {
    order: 3;
  }

  .section-deck {
    grid-template-columns: 1fr;
  }

  .section-index {
    display: none;
  }

  .metric-ribbon article {
    padding: 22px 16px;
  }

  .metric-ribbon article:first-child,
  .metric-ribbon article:nth-child(3) {
    padding-left: 16px;
  }

  .bar-row {
    grid-template-columns: 1fr auto;
  }

  .bar-track {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .confusion-matrix {
    grid-template-columns: 58px repeat(2, minmax(90px, 1fr));
    grid-template-rows: 38px repeat(2, 100px);
  }

  .matrix-cell strong {
    font-size: 30px;
  }

  .method-flow {
    grid-template-columns: 1fr;
    padding: 50px 0;
  }

  .method-flow article {
    min-height: auto;
  }

  .method-flow h2 {
    margin-top: 15px;
  }

  .flow-arrow {
    transform: rotate(90deg);
  }

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

  .honesty-grid article {
    border-right: 0;
    border-bottom: 1px solid var(--ink);
  }

  .honesty-grid article:last-child {
    border-bottom: 0;
  }

  .honesty-grid h3 {
    margin-top: 26px;
  }

  .site-footer {
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 28px 0;
  }

  .site-footer p:last-child {
    justify-self: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}