/*
 * Latent Intuition Labs — parent company site.
 *
 * One stylesheet, no build step, no dependencies beyond the webfonts.
 *
 * The palette is graph stock and plotter ink: a pale cool neutral ground,
 * near-black ink, and a single petrol signal reserved for the measurement
 * itself. It is deliberately not Cognometrist's midnight-and-brass — the
 * two brands should read as related, not as one copied onto the other.
 * Light is the default; the dark block overrides only the palette.
 *
 * Type inverts the usual pairing: a grotesque for display (set large and
 * tight) against a reading serif for prose, with a mono for the
 * instrument labels. The system stacks stay as fallbacks, so the page is
 * still legible if the fonts never arrive.
 */

:root {
  --band: rgba(11, 79, 84, 0.14);
  --font-display: 'Bricolage Grotesque', 'Helvetica Neue', Helvetica, Arial,
      sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, Consolas,
      monospace;
  --font-serif: Literata, Georgia, 'Iowan Old Style', 'Palatino Linotype',
      Times, serif;
  --ink: #0f1614;
  --ink-soft: #56635f;
  --pad: clamp(20px, 4vw, 52px);
  /* The one ink that does not follow the theme: a filled signal button is
     stock-on-petrol in both palettes. */
  --on-signal: #f4f6f2;
  --rail: 154px;
  --rule: rgba(15, 22, 20, 0.16);
  --rule-firm: rgba(15, 22, 20, 0.34);
  --signal: #0b4f54;
  --stock: #eef0ec;
  --stock-2: #e5e8e3;
}

@media (prefers-color-scheme: dark) {
  :root {
    --band: rgba(86, 200, 189, 0.16);
    --ink: #e9ede9;
    --ink-soft: #8a9a97;
    --on-signal: #04191b;
    --rule: rgba(233, 237, 233, 0.14);
    --rule-firm: rgba(233, 237, 233, 0.3);
    --signal: #56c8bd;
    --stock: #0a1012;
    --stock-2: #0f1719;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

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

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

body {
  background: var(--stock);
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: 17px;
  line-height: 1.7;
  margin: 0;
  overflow-wrap: break-word;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-variation-settings: 'wdth' 92;
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.06;
  margin: 0;
  text-wrap: balance;
}

p {
  margin: 0;
}

ol,
ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

a {
  color: var(--signal);
  text-underline-offset: 3px;
}

a:hover {
  color: var(--ink);
}

svg {
  display: block;
}

:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
}

/* Layout ------------------------------------------------------------- */

/* Grows on a large monitor instead of sitting in a narrow strip, but the
   ledger grid below is what actually keeps the content from stranding
   itself on the left: the rail takes the margin, and full-width ruled
   rows use the width that prose does not. */
.wrap {
  margin: 0 auto;
  max-width: clamp(1120px, 72vw, 1360px);
  padding: 0 var(--pad);
  width: 100%;
}

.skip-link {
  background: var(--stock-2);
  border: 1px solid var(--signal);
  border-radius: 2px;
  color: var(--ink);
  left: 12px;
  padding: 10px 16px;
  position: absolute;
  text-decoration: none;
  top: -100px;
  z-index: 10;
}

.skip-link:focus {
  top: 12px;
}

.section {
  padding-top: clamp(64px, 8vw, 112px);
}

/* The page's spine: a mono marker in the margin, pinned while its section
   is being read, and the content beside it. */
.ledger {
  display: grid;
  gap: 0 clamp(24px, 3.5vw, 48px);
  grid-template-columns: var(--rail) minmax(0, 1fr);
}

.ledger-rail {
  align-self: start;
  border-top: 1px solid var(--rule-firm);
  padding-top: 10px;
  position: sticky;
  top: 24px;
}

.section-title {
  font-size: clamp(30px, 3.8vw, 48px);
  margin: 0 0 24px;
  max-width: 17ch;
}

/* The small monospaced label that marks every section and every ledger
   row. */
.sys {
  color: var(--ink-soft);
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.11em;
  line-height: 1.5;
  text-transform: uppercase;
}

.prose {
  display: grid;
  gap: 20px;
  max-width: 66ch;
}

.prose p {
  color: var(--ink-soft);
}

/* Prose resuming after a ruled block, rather than opening a section. */
.prose-after {
  margin-top: 44px;
}

.fine {
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  margin-top: 16px;
}

/* Buttons ------------------------------------------------------------ */

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

.actions-flush {
  margin-top: 0;
}

.btn {
  align-items: center;
  background: none;
  border: 1px solid var(--rule-firm);
  border-radius: 2px;
  color: var(--ink);
  display: inline-flex;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  justify-content: center;
  letter-spacing: 0.08em;
  padding: 15px 24px;
  text-decoration: none;
  text-transform: uppercase;
  transition: background 0.18s, border-color 0.18s, color 0.18s;
}

.btn:hover {
  border-color: var(--signal);
  color: var(--signal);
}

.btn-primary {
  background: var(--signal);
  border-color: var(--signal);
  color: var(--on-signal);
}

.btn-primary:hover {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--stock);
}

/* Masthead ----------------------------------------------------------- */

.masthead {
  border-bottom: 1px solid var(--rule);
}

.masthead-inner {
  align-items: center;
  column-gap: 32px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  padding-bottom: 16px;
  padding-top: 16px;
  row-gap: 10px;
}

.brand {
  align-items: center;
  color: var(--ink);
  display: inline-flex;
  gap: 11px;
  text-decoration: none;
}

/* The mark is a confidence interval: brackets, an axis, and an estimate
   sitting off-centre. The company's whole idea in five strokes. */
.brand-mark {
  flex: none;
  height: 26px;
  width: 26px;
}

.mark-axis {
  stroke: var(--ink-soft);
  stroke-width: 3;
}

.mark-point {
  fill: var(--signal);
}

.brand-name {
  font-family: var(--font-display);
  font-size: 17px;
  font-variation-settings: 'wdth' 94;
  font-weight: 700;
  letter-spacing: -0.015em;
}

/* Tabs --------------------------------------------------------------- */

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 28px;
  margin-right: auto;
  padding-left: clamp(8px, 3vw, 48px);
}

.tab {
  border-bottom: 2px solid transparent;
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  padding: 4px 0;
  text-decoration: none;
  text-transform: uppercase;
  transition: border-color 0.18s, color 0.18s;
}

.tab:hover {
  border-bottom-color: var(--rule-firm);
  color: var(--ink);
}

.tab[aria-current='page'] {
  border-bottom-color: var(--signal);
  color: var(--ink);
}

.masthead-contact {
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  text-decoration: none;
}

.masthead-contact:hover {
  color: var(--ink);
  text-decoration: underline;
}

/* Hero --------------------------------------------------------------- */

.hero {
  padding-bottom: clamp(24px, 4vw, 40px);
  padding-top: clamp(44px, 7vw, 92px);
}

.hero-title {
  font-size: clamp(38px, 5.6vw, 76px);
  letter-spacing: -0.035em;
  line-height: 0.98;
  margin: 14px 0 26px;
  max-width: 15ch;
}

/* The one phrase the whole company is an argument for, marked with the
   same band the readout uses for a measured region. An underline here
   read as a hyperlink; the band does not, and it ties the headline to
   the instrument beside it. */
.hero-title em {
  -webkit-box-decoration-break: clone;
  background: var(--band);
  box-decoration-break: clone;
  color: var(--signal);
  font-style: normal;
  padding: 0 0.08em;
  /* Keeps the band a single clean block: split across a line break it
     reads as two offset swipes. The phrase is short enough to hold even
     at the smallest hero size. */
  white-space: nowrap;
}

.lede {
  color: var(--ink-soft);
  font-size: 19px;
  line-height: 1.62;
  max-width: 52ch;
}

.hero-inner {
  align-items: end;
  display: grid;
  gap: clamp(40px, 5vw, 72px);
  grid-template-columns: minmax(0, 1.02fr) minmax(320px, 0.98fr);
}

/* Readout — the signature ------------------------------------------- */

/* An ability estimate settling as evidence arrives. Everything below
   describes the *settled* state, and the keyframes run from the unknown
   state toward it, so prefers-reduced-motion simply gets the answer. */
.readout {
  border: 1px solid var(--rule);
  border-top: 2px solid var(--signal);
  margin: 0;
  padding: 22px 26px 24px;
}

.readout-head {
  align-items: baseline;
  border-bottom: 1px solid var(--rule);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  justify-content: space-between;
  padding-bottom: 12px;
}

.readout-value {
  color: var(--signal);
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.readout-pm {
  color: var(--ink-soft);
  font-size: 12px;
}

.axis {
  border-left: 1px solid var(--rule-firm);
  border-right: 1px solid var(--rule-firm);
  height: 68px;
  margin: 30px 0 8px;
  position: relative;
}

/* The axis line itself, drawn between the two end brackets. */
.axis::before {
  background: var(--rule-firm);
  content: '';
  height: 1px;
  left: 0;
  position: absolute;
  right: 0;
  top: 34px;
}

.band {
  background: var(--band);
  border-left: 1px solid var(--signal);
  border-right: 1px solid var(--signal);
  bottom: 14px;
  left: 52%;
  position: absolute;
  right: 34%;
  top: 14px;
}

.estimate {
  background: var(--signal);
  border-radius: 50%;
  height: 11px;
  left: 60%;
  margin: -5px 0 0 -5px;
  position: absolute;
  top: 34px;
  width: 11px;
}

/* The rule through the band at the estimate, the way a point estimate is
   drawn on an interval plot. Offsets carry it to the band's own edges. */
.estimate::after {
  background: var(--signal);
  bottom: -14px;
  content: '';
  left: 5px;
  opacity: 0.5;
  position: absolute;
  top: -15px;
  width: 1px;
}

.axis-scale {
  color: var(--ink-soft);
  display: flex;
  font-family: var(--font-mono);
  font-size: 11px;
  justify-content: space-between;
}

.evidence {
  align-items: baseline;
  border-top: 1px solid var(--rule);
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  justify-content: space-between;
  margin-top: 24px;
  padding-top: 16px;
}

.items {
  display: flex;
  gap: 5px;
}

.items li {
  border: 1px solid var(--signal);
  height: 13px;
  opacity: 1;
  width: 13px;
}

.items .hit {
  background: var(--signal);
}

.items .miss {
  border-color: var(--ink-soft);
}

.readout-note {
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.6;
  margin-top: 18px;
}

@media (prefers-reduced-motion: no-preference) {
  .band {
    animation: narrow 2.4s cubic-bezier(0.33, 0.9, 0.3, 1);
  }

  .estimate {
    animation: settle 2.4s cubic-bezier(0.33, 0.9, 0.3, 1);
  }

  .readout-value {
    animation: resolve 2.6s ease;
  }

  .items li {
    animation: record 0.5s ease backwards;
  }

  /* One item lands roughly every seventh of a second, so the band has
     visibly finished contracting by the time the last answer is in. */
  .items li:nth-child(1) {
    animation-delay: 0.15s;
  }

  .items li:nth-child(2) {
    animation-delay: 0.32s;
  }

  .items li:nth-child(3) {
    animation-delay: 0.49s;
  }

  .items li:nth-child(4) {
    animation-delay: 0.66s;
  }

  .items li:nth-child(5) {
    animation-delay: 0.83s;
  }

  .items li:nth-child(6) {
    animation-delay: 1s;
  }

  .items li:nth-child(7) {
    animation-delay: 1.17s;
  }

  .items li:nth-child(8) {
    animation-delay: 1.34s;
  }

  .items li:nth-child(9) {
    animation-delay: 1.51s;
  }

  .items li:nth-child(10) {
    animation-delay: 1.68s;
  }

  .items li:nth-child(11) {
    animation-delay: 1.85s;
  }
}

@keyframes narrow {
  from {
    left: 3%;
    right: 3%;
  }
}

@keyframes settle {
  from {
    left: 50%;
    opacity: 0.35;
  }
}

@keyframes resolve {
  0%,
  55% {
    opacity: 0;
  }
}

@keyframes record {
  from {
    opacity: 0;
    transform: translateY(-5px);
  }
}

/* Mission ------------------------------------------------------------ */

/* Prose with its pull quote hung beside it rather than stacked beneath.
   Prose caps at 66ch, so on a wide monitor the section would otherwise
   strand several hundred pixels of empty column to its right. */
.spread {
  align-items: center;
  display: grid;
  gap: clamp(32px, 4vw, 64px);
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
}

.spread .pull-quote {
  margin: 0;
  max-width: none;
}

.pull-quote {
  border-left: 2px solid var(--signal);
  font-family: var(--font-display);
  font-size: clamp(21px, 2.4vw, 28px);
  font-variation-settings: 'wdth' 94;
  letter-spacing: -0.02em;
  line-height: 1.32;
  margin: 44px 0 0;
  max-width: 40ch;
  padding-left: clamp(20px, 3vw, 30px);
}

/* Ruled rows --------------------------------------------------------- */

/* Principles and product claims are a specification, not a card deck:
   hairline rows with the domain each rule governs in the margin. */
.rows {
  border-bottom: 1px solid var(--rule);
  margin-top: 40px;
}

.row {
  border-top: 1px solid var(--rule);
  display: grid;
  gap: 6px clamp(24px, 3.5vw, 48px);
  grid-template-columns: var(--rail) minmax(0, 21ch) minmax(0, 1fr);
  padding: 26px 0;
}

.row-title {
  font-size: 21px;
  letter-spacing: -0.02em;
}

.row p {
  color: var(--ink-soft);
  font-size: 15.5px;
  line-height: 1.66;
}

.row .sys {
  padding-top: 3px;
}

/* Method ------------------------------------------------------------- */

/* The four steps the copy keeps returning to. auto-fit rather than a
   fixed count, so it drops to two and then one on its own. */
.method {
  border-top: 1px solid var(--rule-firm);
  display: grid;
  gap: clamp(20px, 3vw, 40px);
  grid-template-columns: repeat(auto-fit, minmax(196px, 1fr));
  margin-top: 44px;
  padding-top: 20px;
}

.method h3 {
  color: var(--signal);
  font-family: var(--font-mono);
  font-size: 12px;
  font-variation-settings: normal;
  font-weight: 500;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.method p {
  color: var(--ink-soft);
  font-size: 15.5px;
  line-height: 1.62;
  margin-top: 10px;
}

/* Shipped band ------------------------------------------------------- */

/* The mission page's one nod to the product: what exists, one sentence,
   and the way through to the tab that covers it. */
.shipped {
  align-items: center;
  background: var(--stock-2);
  border-left: 2px solid var(--signal);
  display: grid;
  gap: 20px clamp(28px, 4vw, 56px);
  grid-template-columns: minmax(0, 1fr) auto;
  margin-top: clamp(64px, 8vw, 112px);
  padding: 30px clamp(24px, 3vw, 40px);
}

/* Scoped past `.shipped p` below, which would otherwise win on
   specificity and set the name at body size. */
.shipped .shipped-name {
  font-family: var(--font-display);
  font-size: 27px;
  font-variation-settings: 'wdth' 92;
  font-weight: 600;
  letter-spacing: -0.025em;
  margin: 8px 0 8px;
}

.shipped p {
  color: var(--ink-soft);
  font-size: 15.5px;
  line-height: 1.66;
  max-width: 62ch;
}

/* Product stages ----------------------------------------------------- */

/* These are a pipeline — the order carries information the reader needs,
   which is why they are the one numbered thing on the site. */
.stages {
  counter-reset: stage;
  margin-top: 40px;
}

.stage {
  border-top: 1px solid var(--rule);
  display: grid;
  gap: 6px clamp(24px, 3.5vw, 48px);
  grid-template-columns: var(--rail) minmax(0, 21ch) minmax(0, 1fr);
  padding: 24px 0;
}

.stage:last-child {
  border-bottom: 1px solid var(--rule);
}

.stage .sys::before {
  color: var(--signal);
  content: counter(stage, decimal-leading-zero) '  ';
  counter-increment: stage;
}

.stage-name {
  font-size: 20px;
  letter-spacing: -0.02em;
}

.stage p {
  color: var(--ink-soft);
  font-size: 15.5px;
  line-height: 1.66;
}

/* Cited lesson ------------------------------------------------------- */

.cite {
  border: 1px solid var(--rule);
  border-top: 2px solid var(--signal);
  margin: 0;
  padding: 22px 26px 20px;
}

.cite blockquote {
  font-family: var(--font-serif);
  font-size: 18px;
  line-height: 1.72;
  margin: 14px 0 0;
}

.cite-mark {
  background: var(--band);
  color: var(--signal);
  font-family: var(--font-mono);
  font-size: 10px;
  padding: 1px 4px;
  vertical-align: super;
}

.cite-note {
  border-top: 1px solid var(--rule);
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  margin-top: 18px;
  padding-top: 12px;
  text-transform: uppercase;
}

.product-hero {
  align-items: center;
  display: grid;
  gap: clamp(40px, 5vw, 72px);
  grid-template-columns: minmax(0, 1.08fr) minmax(300px, 0.92fr);
}

/* Contact ------------------------------------------------------------ */

.contact-email {
  font-family: var(--font-display);
  font-size: clamp(22px, 4vw, 38px);
  font-variation-settings: 'wdth' 92;
  font-weight: 500;
  letter-spacing: -0.03em;
  margin-top: 26px;
}

.contact-email a {
  text-decoration-thickness: 1px;
  text-underline-offset: 6px;
}

.social {
  display: flex;
  gap: 10px;
  margin-top: 32px;
}

.social-link {
  align-items: center;
  border: 1px solid var(--rule-firm);
  border-radius: 2px;
  color: var(--ink-soft);
  display: inline-flex;
  height: 42px;
  justify-content: center;
  transition: border-color 0.18s, color 0.18s;
  width: 42px;
}

.social-link:hover {
  border-color: var(--signal);
  color: var(--signal);
}

.social-icon {
  fill: currentcolor;
  height: 19px;
  width: 19px;
}

/* Footer ------------------------------------------------------------- */

.site-footer {
  border-top: 1px solid var(--rule);
  margin-top: clamp(64px, 8vw, 112px);
  padding-bottom: 30px;
  padding-top: 24px;
}

.footer-inner {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  justify-content: space-between;
}

.footer-name,
.footer-nav a {
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
}

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

.footer-nav a:hover {
  color: var(--ink);
  text-decoration: underline;
}

/* Narrow screens ----------------------------------------------------- */

/* One breakpoint takes the page from two columns to one. The rail goes
   first — below this width it costs more than the wayfinding is worth,
   and the marker reads fine above its section — and the paired columns
   go with it, because a 56px headline in a 440px column rags badly. */
@media (max-width: 1040px) {
  .ledger,
  .row,
  .stage,
  .hero-inner,
  .product-hero,
  .shipped,
  .spread {
    grid-template-columns: minmax(0, 1fr);
  }

  .ledger-rail {
    border-top: 0;
    margin-bottom: 10px;
    padding-top: 0;
    position: static;
  }

  .row,
  .stage {
    gap: 8px;
  }

  .row-title,
  .stage-name {
    max-width: none;
  }

  .hero-inner,
  .shipped {
    align-items: start;
  }

  .spread .pull-quote {
    margin-top: 8px;
  }
}

@media (max-width: 620px) {
  body {
    font-size: 16px;
  }

  .tabs {
    order: 3;
    padding-left: 0;
    width: 100%;
  }

  .masthead-contact {
    display: none;
  }

  .section-title,
  .hero-title {
    max-width: none;
  }

  .readout {
    padding: 18px 16px 20px;
  }

  .items {
    gap: 4px;
  }

  .btn {
    flex: 1 1 auto;
  }
}