:root {
  --ink: #17181b;
  --paper: #f2eee6;
  --paper-deep: #e4dccd;
  --paper-soft: #faf7f1;
  --muted: #68655f;
  --rule: #d0c7b8;
  --rule-strong: #17181b;
  --record: #191d22;
  --record-2: #232831;
  --record-line: #3a414b;
  --record-text: #f3eee6;
  --record-muted: #aaa397;
  --signal: #5f7f36;
  --signal-bright: #b5d96a;
  --ochre: #9c6a2f;
  --risk: #a14c35;

  --wrap: 1160px;
  --gutter: clamp(18px, 4vw, 48px);
  --measure: 700px;

  --serif: 'Newsreader', Georgia, 'Times New Roman', serif;   /* body */
  --display: 'Spectral', Georgia, serif;                       /* headings */
  --sans: 'Spectral', Georgia, serif;                          /* legacy alias -> display */
  --mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  --fs-hero: clamp(48px, 7vw, 92px);
  --fs-xl: clamp(34px, 5vw, 66px);
  --fs-lg: clamp(25px, 3vw, 40px);
  --fs-body: clamp(17px, 1.3vw, 19px);
  --fs-small: 15px;
  --fs-label: 11px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(23,24,27,0.025) 1px, transparent 1px) 0 0 / 72px 72px,
    var(--paper);
  font-family: var(--serif);
  font-size: var(--fs-body);
  line-height: 1.58;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
}

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.label {
  font-family: var(--mono);
  font-size: var(--fs-label);
  text-transform: uppercase;
  letter-spacing: 0.13em;
  color: var(--signal);
}

.label.dark {
  color: var(--signal-bright);
}

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

.skip {
  position: absolute;
  left: -999px;
}

.skip:focus {
  left: 16px;
  top: 16px;
  z-index: 99;
  background: var(--ink);
  color: var(--paper);
  padding: 10px 12px;
}

/* Header */

.header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--rule);
  background: rgba(242, 238, 230, 0.94);
  backdrop-filter: blur(12px);
}

.header-inner {
  min-height: 72px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  padding-top: 16px;
  padding-bottom: 16px;
}

.wordmark {
  display: inline-grid;
  gap: 2px;
  text-decoration: none;
  line-height: 1;
}

.wordmark strong {
  font-size: 24px;
  font-family: var(--display);
  font-weight: 600;
  letter-spacing: 0;
}

.wordmark span {
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.2vw, 28px);
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 3px;
}

.nav a:hover,
.nav a:focus-visible,
.nav a[aria-current="page"] {
  color: var(--ink);
  border-color: var(--ink);
}

/* Buttons */

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 17px;
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--ink);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
}

.btn:hover,
.btn:focus-visible {
  background: var(--signal);
  border-color: var(--signal);
}

.btn.secondary {
  background: transparent;
  color: var(--ink);
  border-color: var(--rule-strong);
}

.btn.secondary:hover,
.btn.secondary:focus-visible {
  background: var(--ink);
  color: var(--paper);
}

.record .btn {
  background: var(--record-text);
  color: var(--record);
  border-color: var(--record-text);
}

.record .btn.secondary {
  background: transparent;
  color: var(--record-text);
  border-color: var(--record-line);
}

/* Hero */

.hero {
  padding: clamp(36px, 5vw, 64px) 0 clamp(40px, 6vw, 80px);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(310px, 0.74fr);
  gap: clamp(34px, 7vw, 88px);
  align-items: start;
}

.hero .label {
  display: inline-block;
  margin-bottom: 22px;
}

.hero h1 {
  max-width: 14ch;
  font-family: var(--display);
  font-size: var(--fs-hero);
  font-weight: 500;
  line-height: 1.0;
  letter-spacing: -0.02em;
}

.hero-lede {
  max-width: 650px;
  margin-top: 28px;
  font-size: clamp(21px, 2.1vw, 28px);
  line-height: 1.34;
  letter-spacing: -0.018em;
}

/* Hero panel — compact gap widget */

.hero-panel {
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 96px;
  margin-top: calc(11px + 22px); /* label line-height + label margin-bottom */
}

.hero-gap {
  border: 1px solid var(--rule);
  overflow: hidden;
}

.hero-gap-row {
  padding: clamp(14px, 2vw, 20px) clamp(14px, 2vw, 22px);
}

.hg-claim {
  background: var(--paper-soft);
  border-bottom: 1px solid var(--rule);
}

.hg-engine {
  background: var(--record);
  color: var(--record-text);
}

.hg-label {
  display: block;
  margin-bottom: 8px;
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--signal);
}

.hg-label-dark {
  color: var(--signal-bright);
}

.hg-text {
  font-family: var(--display);
  font-size: clamp(15px, 1.4vw, 18px);
  line-height: 1.3;
  letter-spacing: -0.008em;
  color: var(--ink);
}

.hg-mono {
  font-family: var(--mono);
  font-size: clamp(11px, 0.9vw, 13px);
  line-height: 1.6;
  color: #d9d2c7;
}

.hg-prompt { color: var(--signal-bright); }

.hg-finding {
  display: flex;
  gap: 10px;
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--record-line);
  font-family: var(--mono);
  font-size: 11px;
}

.hg-dt {
  color: var(--record-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  white-space: nowrap;
}

.hg-dd { color: var(--signal-bright); }

.hero-attrs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-left: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.hero-attrs span {
  padding: 10px 12px;
  border-right: 1px solid var(--rule);
  border-top: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--muted);
}


/* Evidence section */

.evidence-band {
  background: var(--paper-deep);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: clamp(44px, 7vw, 86px) 0;
}

.evidence-intro {
  display: grid;
  grid-template-columns: minmax(190px, 0.36fr) minmax(0, 0.64fr);
  gap: clamp(24px, 6vw, 76px);
  margin-bottom: clamp(26px, 5vw, 54px);
}

.evidence-intro h2 {
  font-family: var(--display);
  font-size: var(--fs-xl);
  font-weight: 500;
  line-height: 1.02;
  letter-spacing: -0.02em;
}

.evidence-intro p {
  max-width: 670px;
  margin-top: 18px;
  font-size: clamp(18px, 1.8vw, 23px);
  line-height: 1.42;
  color: #3c3934;
}

.record {
  background: var(--record);
  color: var(--record-text);
  border: 1px solid var(--record-line);
  box-shadow: 0 28px 70px rgba(49, 43, 34, 0.16);
}

.record-top {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--record-line);
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--record-muted);
}

.record-top strong {
  color: var(--signal-bright);
  font-weight: 500;
}

.record-body {
  display: grid;
  grid-template-columns: 0.44fr 0.56fr;
}

.claim-panel,
.output-panel {
  padding: clamp(22px, 4vw, 42px);
}

.claim-panel {
  border-right: 1px solid var(--record-line);
  background: var(--record-2);
}

.claim-panel p {
  margin-top: 16px;
  font-family: var(--display);
  font-size: clamp(24px, 3vw, 38px);
  line-height: 1.16;
  letter-spacing: -0.012em;
}

.output-panel .terminal {
  margin-top: 16px;
  font-family: var(--mono);
  font-size: clamp(13px, 1.2vw, 15px);
  line-height: 1.68;
  color: #d9d2c7;
}

.prompt {
  color: var(--signal-bright);
}

.risk-line {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--record-line);
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 18px;
  font-family: var(--mono);
  font-size: 12px;
}

.risk-line dt {
  color: var(--record-muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.risk-line dd {
  color: var(--record-text);
}

.risk-line strong {
  color: var(--signal-bright);
  font-weight: 500;
}

.record-note {
  padding: 14px 16px;
  border-top: 1px solid var(--record-line);
  color: var(--record-muted);
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.5;
}

/* Sections */

.section {
  padding: clamp(28px, 4vw, 52px) 0;
}

.section + .section {
  padding-top: 0;
}

.section-head {
  display: grid;
  grid-template-columns: minmax(190px, 0.36fr) minmax(0, 0.64fr);
  gap: clamp(24px, 6vw, 76px);
  padding-top: 24px;
  border-top: 1px solid var(--rule-strong);
  margin-bottom: clamp(30px, 5vw, 60px);
}

.section h2 {
  font-family: var(--display);
  font-size: var(--fs-xl);
  font-weight: 500;
  line-height: 1.02;
  letter-spacing: -0.02em;
}

.section-intro {
  max-width: 690px;
  margin-top: 18px;
  color: var(--muted);
  font-size: clamp(18px, 1.8vw, 23px);
  line-height: 1.42;
}

.diagnostic-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border-left: 1px solid var(--rule);
  border-top: 1px solid var(--rule);
}

.diagnostic-card {
  min-height: 235px;
  padding: 18px;
  background: rgba(250, 247, 241, 0.55);
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.diagnostic-card span {
  display: block;
  margin-bottom: 36px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--signal);
  letter-spacing: 0.12em;
}

.diagnostic-card h3 {
  margin-bottom: 12px;
  font-family: var(--display);
  font-size: 23px;
  font-weight: 500;
  line-height: 1.12;
  letter-spacing: -0.01em;
}

.diagnostic-card p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.5;
}

/* Deliverable */

.deliverable {
  background: var(--record);
  color: var(--record-text);
  border-top: 1px solid var(--record-line);
  border-bottom: 1px solid var(--record-line);
}

.deliverable .section-head {
  border-color: var(--record-line);
}

.deliverable .section-intro {
  color: var(--record-muted);
}

.deliverable-panel {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(280px, 0.28fr);
  gap: 1px;
  background: var(--record-line);
  border: 1px solid var(--record-line);
}

.deliverable-main,
.deliverable-side {
  background: var(--record-2);
  padding: clamp(24px, 4vw, 44px);
}

.deliverable-main h3 {
  max-width: 760px;
  font-family: var(--display);
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.04;
  letter-spacing: -0.018em;
}

.deliverable-main p {
  max-width: 700px;
  margin-top: 18px;
  color: var(--record-muted);
}

.deliverable-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin-top: 28px;
  background: var(--record-line);
  border: 1px solid var(--record-line);
}

.deliverable-list div {
  padding: 15px 16px;
  background: var(--record);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.boundary-list {
  display: grid;
  gap: 18px;
}

.boundary-item {
  padding-bottom: 18px;
  border-bottom: 1px solid var(--record-line);
}

.boundary-item span {
  display: block;
  margin-bottom: 6px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--record-muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.boundary-item strong {
  font-family: var(--display);
  font-size: 20px;
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.008em;
}

/* Use cases */

.use-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.use-card {
  min-height: 190px;
  padding: 20px;
  background: var(--paper-soft);
}

.use-card h3 {
  margin-bottom: 36px;
  font-family: var(--display);
  font-size: 24px;
  font-weight: 500;
  line-height: 1.12;
  letter-spacing: -0.01em;
}

.use-card p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.5;
}

/* Method page */

.page-hero {
  padding: clamp(36px, 5vw, 64px) 0 clamp(30px, 5vw, 56px);
}

.page-hero h1 {
  max-width: 11ch;
  font-family: var(--display);
  font-size: var(--fs-hero);
  font-weight: 500;
  line-height: 1.0;
  letter-spacing: -0.02em;
}

.page-hero p {
  max-width: 720px;
  margin-top: 24px;
  font-size: clamp(21px, 2vw, 27px);
  line-height: 1.36;
  letter-spacing: -0.018em;
  color: var(--muted);
}

.method-list {
  counter-reset: method;
  border-top: 1px solid var(--rule);
}

.method-item {
  counter-increment: method;
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: clamp(22px, 5vw, 76px);
  padding: clamp(28px, 4vw, 52px) 0;
  border-bottom: 1px solid var(--rule);
}

.method-item::before {
  content: counter(method, decimal-leading-zero);
  padding-top: 6px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--signal);
  letter-spacing: 0.13em;
}

.method-item h2 {
  max-width: 720px;
  margin-bottom: 12px;
  font-family: var(--display);
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.04;
  letter-spacing: -0.018em;
}

.method-item p {
  max-width: 740px;
  color: var(--muted);
}

/* Contact */

.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.7fr) minmax(280px, 0.3fr);
  gap: clamp(30px, 6vw, 84px);
  padding-bottom: clamp(58px, 9vw, 112px);
}

.form {
  display: grid;
  gap: 15px;
}

.form-field {
  display: grid;
  gap: 7px;
}

.form-field label {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.form-field input,
.form-field textarea {
  width: 100%;
  padding: 14px 14px;
  border: 1px solid var(--rule);
  border-radius: 0;
  background: rgba(250, 247, 241, 0.55);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 16px;
}

.form-field textarea {
  min-height: 150px;
  resize: vertical;
}

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--signal);
}

.contact-aside {
  border-top: 1px solid var(--rule-strong);
  padding-top: 18px;
}

.contact-aside h2 {
  margin-bottom: 12px;
  font-family: var(--display);
  font-size: 30px;
  font-weight: 500;
  line-height: 1.06;
  letter-spacing: -0.012em;
}

.contact-aside p {
  color: var(--muted);
  margin-bottom: 18px;
}

.email-link {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--signal);
  text-decoration: none;
  border-bottom: 1px solid var(--signal);
  word-break: break-word;
}

/* CTA and footer */

.cta {
  padding: clamp(54px, 8vw, 104px) 0;
}

.cta-panel {
  background: var(--record);
  color: var(--record-text);
  padding: clamp(30px, 6vw, 70px);
  border: 1px solid var(--record-line);
}

.cta-panel h2 {
  max-width: 13ch;
  font-family: var(--display);
  font-size: var(--fs-xl);
  font-weight: 500;
  line-height: 1.02;
  letter-spacing: -0.02em;
}

.cta-panel p {
  max-width: 660px;
  margin-top: 18px;
  color: var(--record-muted);
  font-size: clamp(18px, 1.8vw, 23px);
  line-height: 1.42;
}

.footer {
  padding: 28px 0 34px;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr minmax(280px, 0.6fr);
  gap: 28px;
}

.footer p + p {
  margin-top: 5px;
}

.footer a {
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.footer a:hover,
.footer a:focus-visible {
  color: var(--ink);
  border-color: var(--ink);
}

/* Reader (the person behind the read) */

.reader-body {
  display: grid;
  grid-template-columns: minmax(0, 0.66fr) minmax(260px, 0.34fr);
  gap: clamp(28px, 6vw, 76px);
  align-items: start;
}

.reader-main p {
  max-width: 680px;
  color: #3c3934;
}

.reader-main p + p {
  margin-top: 16px;
}

.reader-side {
  position: sticky;
  top: 96px;
}

.reader-card {
  padding: clamp(22px, 3vw, 30px);
  background: var(--paper-soft);
  border: 1px solid var(--rule);
}

.reader-card .label {
  display: block;
  margin-bottom: 14px;
}

.reader-name {
  font-family: var(--display);
  font-size: 26px;
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.01em;
}

.reader-role {
  margin-top: 2px;
  margin-bottom: 18px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

/* Accessibility and responsive */

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
}

@media (max-width: 980px) {
  .hero-grid,
  .evidence-intro,
  .record-body,
  .section-head,
  .deliverable-panel,
  .reader-body,
  .contact-layout,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .hero-panel { position: static; margin-top: 28px; }

  .claim-panel {
    border-right: 0;
    border-bottom: 1px solid var(--record-line);
  }

  .reader-side { position: static; }

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

  .use-grid,
  .deliverable-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav {
    width: 100%;
    justify-content: space-between;
  }

  .hero h1,
  .page-hero h1 {
    max-width: none;
  }

  .hero-attrs,
  .diagnostic-grid,
  .use-grid,
  .deliverable-list {
    grid-template-columns: 1fr;
  }

  .risk-line,
  .method-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}