/*
  Lacuna Labs landing — stylesheet.

  Canon:
    research/lacuna-labs-did-v1.md      § Machine Data (palette, typography, geometry)
    research/lacuna-did-v1.md           § parent canon
    research/lacuna-did-v1.2-web-surface-rule.md   structural greys / interactive hue split
    research/lacuna-did-v1.4-geometry-naming-version.md   hard 90 corners brand-adjacent
    research/lacuna-canon-v0.4.0-visual-canon-rename.md   visual scope rule

  Per DID v1.2: Lacuna/Labs is the parent surface — no claimed hue.
  Structural elements use the canonical greys; interactive feedback falls back
  to the mid-grey since the parent claims no color. No --accent brass; no
  Sakura pink; no Fraunces. Geist Mono (SIL OFL) for the wordmark, Inter for
  body copy.
*/

/* Geist Mono — SIL OFL, served via Google Fonts. */
@import url('https://fonts.googleapis.com/css2?family=Geist+Mono:wght@400;500;600&family=Inter:wght@400;500;600&display=swap');

:root {
  /* Canonical greys — DID-LACUNA-LABS-v1.0 § Color, dark mode default.
     Light mode is opt-in via @media (prefers-color-scheme: light) below.
     The lockup needs a light wordmark on a dark canvas at first paint. */
  --ink-light: #2a2a2a;        /* bar.square_1 / L*16 */
  --ink-mid:   #888888;        /* bar.square_2 / L*57 — invariant across modes */
  --ink-dark:  #fafafa;        /* bar.square_3 / L*98 / wordmark_fg */
  --slash:     #555555;        /* L*36 — constant across modes */
  --page-bg:   #0a0a0a;        /* lifted from #000 per Harrison 2002 halation */

  /* Reading-surface neutrals derived from the bar tones (chrome only, no claim) */
  --tone-1:    #141414;        /* card surface — between page-bg and ink-light */
  --tone-2:    #1c1c1c;        /* card hover / border axis */
  --rule:      #2a2a2a;        /* hairline rule == ink-light */

  /* Lacuna/Labs has no claimed hue. Interactive feedback uses the mid-grey
     per DID v1.2 ("bare-Lacuna and Lacuna/Labs ... fall back to the mid-grey
     for hover; this is intentional restraint, not a gap"). */
  --interactive: var(--ink-mid);

  /* Typography stacks — DID v1.0 § Typography */
  --mono: 'Geist Mono', ui-monospace, 'JetBrains Mono', 'Cascadia Code', Menlo, Consolas, monospace;
  --sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;

  /* SVG var bridge so the canonical assets read the page palette */
  --bar-1: var(--ink-light);
  --bar-2: var(--ink-mid);
  --bar-3: var(--ink-dark);
  --wordmark-fg: var(--ink-dark);

  /* Geometry — DID v1.4 lock: brand-adjacent chrome is hard 90 corners. */
  --radius-brand: 0;
  --radius-distant: 2px;
}

@media (prefers-color-scheme: light) {
  :root {
    /* Light mode — opt-in via OS preference. Dark is the default canvas. */
    --ink-light: #d4d4d4;      /* bar.square_1 / L*84 */
    --ink-mid:   #888888;      /* bar.square_2 / L*57 — invariant */
    --ink-dark:  #1a1a1a;      /* bar.square_3 / L*10 / wordmark_fg */
    --slash:     #555555;
    --page-bg:   #fffaf3;      /* L*98 a*+1 b*+4 — soft warm white */

    --tone-1:    #f1ece4;
    --tone-2:    #e6ddd0;
    --rule:      #d4d4d4;

    --bar-1: var(--ink-light);
    --bar-2: var(--ink-mid);
    --bar-3: var(--ink-dark);
    --wordmark-fg: var(--ink-dark);
  }
}

* { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  background: var(--page-bg);
  color: var(--ink-dark);
  font-family: var(--sans);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.55;
}

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

.page {
  max-width: 820px;
  margin: 0 auto;
  padding: 56px 32px 96px;
}

.page--wide { max-width: 1080px; }

/* ---------- Nav ---------- */

.nav {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-bottom: 56px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.01em;
}

.nav__home {
  display: inline-flex;
  align-items: center;
  margin-right: auto;
  text-decoration: none;
  color: var(--ink-dark);
}

.nav__home img {
  height: 24px;          /* DID v1.0 min_size: 24px tall on screen */
  width: auto;
  display: block;
}

.nav a {
  text-decoration: none;
  color: var(--ink-mid);
  padding: 4px 0;
  border-radius: var(--radius-brand);
  transition: color 120ms ease;
}

.nav a:hover,
.nav a.is-current {
  color: var(--ink-dark);
}

/* ---------- Typography ---------- */

h1, h2, h3 {
  font-family: var(--mono);
  font-weight: 500;
  color: var(--ink-dark);
  margin: 0;
  letter-spacing: -0.005em;
}

h1 {
  font-size: 28px;
  line-height: 1.2;
  margin: 0 0 16px;
}

h2 {
  font-size: 18px;
  line-height: 1.3;
  margin: 56px 0 16px;
  font-weight: 500;
  text-transform: none;
}

h3 {
  font-size: 15px;
  line-height: 1.3;
  font-weight: 500;
  margin: 0 0 8px;
}

p {
  margin: 0 0 16px;
  color: var(--ink-dark);
  max-width: 66ch;
}

.lede {
  font-family: var(--mono);
  font-weight: 400;
  font-size: 14px;
  line-height: 1.55;
  color: var(--ink-mid);
  margin: 0 0 40px;
  max-width: 66ch;
}

a {
  color: var(--ink-dark);
  text-decoration: underline;
  text-decoration-color: var(--ink-mid);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: text-decoration-color 120ms ease;
}

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

a:focus-visible {
  outline: 2px solid var(--interactive);
  outline-offset: 2px;
  border-radius: var(--radius-brand);
}

code, kbd, samp, pre {
  font-family: var(--mono);
  font-size: 0.94em;
}

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

.hero { padding: 8px 0 24px; }

.hero__lockup {
  display: block;
  width: 100%;
  max-width: 620px;          /* respects 660 viewBox */
  height: auto;
  margin: 0 0 40px;
}

.hero__positioning {
  font-family: var(--mono);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink-dark);
  margin: 0 0 24px;
  max-width: 66ch;
}

.hero__caption {
  font-family: var(--sans);
  font-size: 14px;
  color: var(--ink-mid);
  margin: 0 0 32px;
  max-width: 66ch;
}

/* ---------- Section divider ---------- */

.rule {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 48px 0 32px;
}

/* ---------- Data table (apps, docs, team) ---------- */

.dtable {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0 32px;
  font-size: 14px;
  font-family: var(--sans);
}

.dtable th,
.dtable td {
  text-align: left;
  padding: 12px 16px 12px 0;
  vertical-align: top;
  border-bottom: 1px solid var(--rule);
}

.dtable th {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-mid);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--ink-mid);
}

.dtable td.col-key {
  font-family: var(--mono);
  font-weight: 500;
  font-size: 14px;
  color: var(--ink-dark);
  white-space: nowrap;
  width: 1%;
  padding-right: 24px;
}

.dtable td.col-status {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-mid);
  white-space: nowrap;
  width: 1%;
}

.dtable td.col-desc {
  color: var(--ink-dark);
  line-height: 1.5;
}

.dtable td.col-desc .authority {
  display: block;
  margin-top: 4px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-mid);
}

.dtable a {
  color: var(--ink-dark);
  text-decoration: underline;
  text-decoration-color: var(--ink-mid);
}

.dtable a:hover { text-decoration-color: var(--ink-dark); }

/* Doc rows — path beneath the description */
.dtable .docpath {
  display: block;
  margin-top: 6px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-mid);
}

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

.footer {
  margin-top: 80px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-mid);
  line-height: 1.6;
}

.footer p { margin: 0 0 4px; color: var(--ink-mid); }

.footer a {
  color: var(--ink-mid);
  text-decoration-color: var(--ink-mid);
}

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

/* ---------- Append-only marker (canon ornament) ---------- */

.colophon {
  margin-top: 24px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-mid);
  letter-spacing: 0.02em;
}

.colophon::before { content: "# "; color: var(--ink-mid); }

/* ---------- Topbar (used on all pages going forward) ---------- */

.topbar {
  display: flex;
  align-items: center;
  gap: 24px;
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px 32px 0;
}

.topbar__mark {
  display: inline-flex;
  align-items: center;
  margin-right: auto;
  text-decoration: none;
  color: var(--ink-dark);
}

.topbar__mark img {
  height: 24px;
  width: auto;
  display: block;
}

.topbar__nav {
  display: flex;
  gap: 24px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.01em;
}

.topbar__nav a {
  text-decoration: none;
  color: var(--ink-mid);
  padding: 4px 0;
  transition: color 120ms ease;
}

.topbar__nav a:hover,
.topbar__nav a[aria-current="page"] {
  color: var(--ink-dark);
}

/* ---------- Page variants ---------- */

.page--narrow { max-width: 680px; }

/* ---------- Home hero (the one that pays salaries) ---------- */

.home-hero {
  padding: 24px 0 8px;
}

.home-hero__lockup {
  display: block;
  width: 100%;
  max-width: 560px;
  height: auto;
  margin: 0 0 40px;
  animation: lockup-fade 600ms ease-out both;
}

.home-hero__headline {
  font-family: var(--mono);
  font-weight: 500;
  font-size: 32px;
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--ink-dark);
  margin: 0 0 20px;
  max-width: 22ch;
}

.home-hero__lede {
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.55;
  color: var(--ink-dark);
  margin: 0 0 0;
  max-width: 58ch;
}

@keyframes lockup-fade {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  .home-hero__lockup { animation: none; }
}

/* ---------- Belief block (three short lines) ---------- */

.beliefs {
  margin: 64px 0 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.beliefs__item {
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink-dark);
  margin: 0;
  border-top: 1px solid var(--ink-mid);
  padding-top: 16px;
}

.beliefs__item strong {
  display: block;
  font-family: var(--mono);
  font-weight: 500;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-mid);
  margin: 0 0 8px;
}

/* ---------- Product grid (2x2) ---------- */

.products {
  margin: 32px 0 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.product {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 24px;
  background: var(--tone-1);
  border: 1px solid var(--rule);
  border-radius: var(--radius-brand);
  text-decoration: none;
  color: var(--ink-dark);
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.product:hover {
  transform: translateY(-2px);
  border-color: var(--ink-mid);
  background: var(--tone-2);
  text-decoration: none;
}

.product__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin: 0 0 12px;
}

.product__name {
  font-family: var(--mono);
  font-weight: 500;
  font-size: 18px;
  color: var(--ink-dark);
  margin: 0;
}

.product__desc {
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.55;
  color: var(--ink-dark);
  margin: 0;
  max-width: none;
}

.pill {
  display: inline-block;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-mid);
  padding: 3px 8px;
  border: 1px solid var(--ink-mid);
  border-radius: var(--radius-brand);
  white-space: nowrap;
  line-height: 1.2;
}

.pill--live { color: var(--ink-dark); border-color: var(--ink-dark); }
.pill--beta { color: var(--ink-dark); border-color: var(--ink-mid); }
.pill--roadmap { color: var(--ink-mid); border-color: var(--rule); }

@media (prefers-reduced-motion: reduce) {
  .product { transition: none; }
  .product:hover { transform: none; }
}

/* ---------- Where-to-go buttons (CTA row) ---------- */

.cta-row {
  margin: 32px 0 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.cta {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 20px 24px;
  background: var(--page-bg);
  border: 1px solid var(--ink-mid);
  border-radius: var(--radius-brand);
  text-decoration: none;
  color: var(--ink-dark);
  font-family: var(--mono);
  transition: background 120ms ease, border-color 120ms ease;
  min-height: 88px;
}

.cta:hover {
  background: var(--tone-1);
  border-color: var(--ink-dark);
  text-decoration: none;
}

.cta__label {
  font-weight: 500;
  font-size: 15px;
  color: var(--ink-dark);
}

.cta__sub {
  font-family: var(--sans);
  font-size: 13px;
  color: var(--ink-mid);
  margin-top: 8px;
}

.cta__arrow {
  display: inline-block;
  margin-left: 6px;
  color: var(--ink-mid);
  transition: transform 120ms ease, color 120ms ease;
}

.cta:hover .cta__arrow {
  color: var(--ink-dark);
  transform: translateX(2px);
}

@media (prefers-reduced-motion: reduce) {
  .cta, .cta__arrow { transition: none; }
  .cta:hover .cta__arrow { transform: none; }
}

/* ---------- Section heads on the home page ---------- */

.section-head {
  font-family: var(--mono);
  font-weight: 500;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-mid);
  margin: 80px 0 4px;
}

/* ---------- Apps page — long-form product blocks ---------- */

.product-block {
  margin: 56px 0 0;
  padding-top: 32px;
  border-top: 1px solid var(--rule);
  scroll-margin-top: 24px;
}

.product-block:first-of-type {
  margin-top: 32px;
}

.product-block__head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin: 0 0 16px;
  flex-wrap: wrap;
}

.product-block__name {
  font-family: var(--mono);
  font-weight: 500;
  font-size: 22px;
  color: var(--ink-dark);
  margin: 0;
}

.product-block p {
  max-width: 66ch;
}

.product-block__action {
  display: inline-block;
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-dark);
  text-decoration: none;
  border-bottom: 1px solid var(--ink-mid);
  padding-bottom: 2px;
  transition: border-color 120ms ease;
}

.product-block__action:hover {
  border-color: var(--ink-dark);
  text-decoration: none;
}

.product-block__when {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-mid);
  margin-top: 12px;
}

/* ---------- Contact-style helpers (already in use) ---------- */

.block { margin: 40px 0; }

.block.quiet {
  font-size: 13px;
  color: var(--ink-mid);
}

.block.quiet p { color: var(--ink-mid); max-width: 66ch; }

a.mono.large {
  font-family: var(--mono);
  font-size: 22px;
  font-weight: 500;
  color: var(--ink-dark);
}

a.action {
  display: inline-block;
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-dark);
  text-decoration: none;
  border-bottom: 1px solid var(--ink-mid);
  padding-bottom: 2px;
}

a.action:hover { border-color: var(--ink-dark); }

/* ---------- Library note (small italic context line) ---------- */

.libnote {
  font-family: var(--sans);
  font-size: 13px;
  color: var(--ink-mid);
  font-style: italic;
  margin: -4px 0 16px;
}

/* ---------- Responsive ----------
   Two breakpoints:
     ≤720px  — phones in landscape, small tablets. Stack everything,
               bring type down, give touch targets room.
     ≤420px  — small phones in portrait. Tighter still.
   iOS zoom note: any form input below 16px causes the browser to zoom
   on focus. Inputs at this breakpoint and below are forced to 16px.
*/

@media (max-width: 720px) {
  /* Page chrome ─────────────────────────────────────────────────── */
  .page { padding: 24px 18px 64px; max-width: 100%; }
  .page--narrow { max-width: 100%; }
  .page--wide   { max-width: 100%; }

  .topbar { padding: 18px 18px 0; gap: 14px; flex-wrap: wrap; }
  .topbar__mark img { height: 22px; }
  .topbar__nav { gap: 14px; font-size: 12px; }

  /* Type ───────────────────────────────────────────────────────── */
  h1 { font-size: 22px; }
  h2 { font-size: 16px; margin-top: 40px; }
  .lede { font-size: 13px; }

  /* Hero ───────────────────────────────────────────────────────── */
  .home-hero { padding: 12px 0 0; }
  .home-hero__lockup { max-width: 100%; margin-bottom: 28px; }
  .home-hero__headline { font-size: 24px; line-height: 1.22; max-width: none; }
  .home-hero__lede { font-size: 14px; }
  .home-hero__deck { font-size: 14px; }

  /* Boot sequence ──────────────────────────────────────────────── */
  .boot__seq { font-size: 10.5px; line-height: 1.5; }

  /* Hero CTAs — stack full-width, generous touch targets ───────── */
  .hero-cta { flex-direction: column; gap: 10px; margin-top: 20px; }
  .cta-primary,
  .cta-secondary {
    width: 100%;
    justify-content: center;
    padding: 14px 20px;
    font-size: 15px;
  }

  /* Ask widget — prompt stays inline, input + button stack ─────── */
  .ask { margin-top: 48px; padding: 20px 16px; }
  .ask__form { flex-wrap: wrap; gap: 8px; }
  .ask__prompt { padding: 0 6px 0 0; font-size: 18px; }
  .ask__input {
    flex: 1 1 calc(100% - 24px);
    min-width: 0;
    font-size: 16px;        /* prevent iOS focus-zoom */
    padding: 12px 12px;
  }
  .ask__send { width: 100%; padding: 12px 16px; font-size: 14px; }
  .ask__note { font-size: 10.5px; }

  /* Perlis epigram (hero + standalone use both) ────────────────── */
  .epigram { padding: 24px 18px; margin-top: 48px; }
  .epigram--hero { margin: 28px 0 16px; padding: 22px 16px; }
  .epigram__q { font-size: 15px; line-height: 1.7; }
  .epigram__cite { font-size: 12px; }

  /* About block ────────────────────────────────────────────────── */
  .about p { font-size: 14.5px; line-height: 1.6; }

  /* Beliefs / Products / CTA row — single column ───────────────── */
  .beliefs { grid-template-columns: 1fr; gap: 14px; margin-top: 24px; }
  .beliefs__item { font-size: 14.5px; line-height: 1.6; padding-top: 14px; }
  .products { grid-template-columns: 1fr; gap: 12px; }
  .product { padding: 20px; }
  .product__head { gap: 10px; flex-wrap: wrap; }
  .product__name { font-size: 16px; }
  .product__desc { font-size: 14px; line-height: 1.6; }
  .product__cta { font-size: 13px; }
  .cta-row { grid-template-columns: 1fr; gap: 10px; }
  .cta { min-height: 64px; padding: 16px 20px; }
  .cta__label { font-size: 14px; }
  .cta__sub { font-size: 12.5px; }

  /* Lineage ────────────────────────────────────────────────────── */
  .lineage p { font-size: 14.5px; line-height: 1.6; }
  .lineage__roster { font-size: 13px; word-spacing: 0.04em; }

  /* Close ──────────────────────────────────────────────────────── */
  .close { margin-top: 48px; padding: 28px 18px; }
  .close__head { font-size: 18px; line-height: 1.3; }
  .close__sub { font-size: 14px; }

  /* Apps page (data-tables) ────────────────────────────────────── */
  .dtable { font-size: 13px; }
  .dtable td.col-key { white-space: normal; }
  .product-block { margin-top: 40px; padding-top: 24px; }
  .product-block__name { font-size: 18px; }

  /* Team page ──────────────────────────────────────────────────── */
  .team-roster { grid-template-columns: 1fr; gap: 16px; }
  .member { padding: 20px; }
  .member__name { font-size: 18px; }
  .member__bio { font-size: 14px; }

  /* Footer ─────────────────────────────────────────────────────── */
  .footer { margin-top: 56px; padding-top: 20px; font-size: 11.5px; }
  .shibboleth { font-size: 11.5px; line-height: 1.55; }
  .shibboleth__cite { font-size: 10.5px; display: block; margin-top: 2px; }
}

@media (max-width: 420px) {
  /* Tightest pass for small phone portraits.
     The page already stacks at 720px; here we just shave a bit more. */
  .page { padding: 20px 14px 56px; }
  .topbar { padding: 14px 14px 0; gap: 10px; }
  .topbar__mark img { height: 20px; }
  .topbar__nav { gap: 10px; font-size: 11.5px; }

  .home-hero__headline { font-size: 20px; }
  .home-hero__lede { font-size: 13px; }

  .epigram--hero { padding: 18px 14px; }
  .epigram__q { font-size: 14.5px; }

  .ask { padding: 16px 14px; }
  .product { padding: 16px; }
  .close { padding: 24px 14px; }
}

/* ---------- Hero CTA row ---------- */

.hero-cta {
  display: flex;
  gap: 14px;
  margin: 24px 0 0;
  flex-wrap: wrap;
}

.cta-primary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 20px;
  background: var(--ink-dark);
  color: var(--page-bg);
  font-family: var(--mono);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.01em;
  text-decoration: none;
  border: 1px solid var(--ink-dark);
  border-radius: var(--radius-brand);
  transition: transform 120ms ease, background 120ms ease;
}

.cta-primary:hover {
  text-decoration: none;
  transform: translateY(-1px);
  background: var(--ink-mid);
  border-color: var(--ink-mid);
}

.cta-primary--lg {
  padding: 16px 28px;
  font-size: 16px;
}

.cta-secondary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 20px;
  background: transparent;
  color: var(--ink-dark);
  font-family: var(--mono);
  font-weight: 500;
  font-size: 14px;
  text-decoration: none;
  border: 1px solid var(--ink-mid);
  border-radius: var(--radius-brand);
  transition: border-color 120ms ease, transform 120ms ease;
}

.cta-secondary:hover {
  text-decoration: none;
  border-color: var(--ink-dark);
  transform: translateY(-1px);
}

@media (prefers-reduced-motion: reduce) {
  .cta-primary, .cta-secondary { transition: none; }
  .cta-primary:hover, .cta-secondary:hover { transform: none; }
}

/* ---------- Ask widget — the "flip" moment ---------- */

.ask {
  margin: 64px 0 0;
  padding: 24px;
  background: var(--tone-1);
  border: 1px solid var(--rule);
  border-radius: var(--radius-brand);
}

.ask__head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 12px;
}

.ask__label {
  font-family: var(--mono);
  font-weight: 500;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-mid);
}

/* Pulse dot — quiet life signal next to the label. */
.ask__pulse {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--ink-mid);
  border-radius: 50%;
  animation: ask-pulse 2.4s ease-in-out infinite;
}

@keyframes ask-pulse {
  0%, 100% { opacity: 0.4; transform: scale(1); }
  50%      { opacity: 1.0; transform: scale(1.2); }
}

.ask__form {
  display: flex;
  gap: 8px;
  margin: 0 0 12px;
}

.ask__input {
  flex: 1;
  min-width: 0;
  padding: 12px 14px;
  background: var(--page-bg);
  color: var(--ink-dark);
  border: 1px solid var(--ink-mid);
  border-radius: var(--radius-brand);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.4;
  transition: border-color 120ms ease;
}

.ask__input:focus {
  outline: none;
  border-color: var(--ink-dark);
}

.ask__input::placeholder { color: var(--ink-mid); }

.ask__send {
  padding: 12px 18px;
  background: var(--ink-dark);
  color: var(--page-bg);
  border: 1px solid var(--ink-dark);
  border-radius: var(--radius-brand);
  font-family: var(--mono);
  font-weight: 500;
  font-size: 14px;
  cursor: pointer;
  transition: background 120ms ease, transform 120ms ease;
}

.ask__send:hover {
  background: var(--ink-mid);
  border-color: var(--ink-mid);
  transform: translateY(-1px);
}

.ask__send:active { transform: translateY(0); }

.ask__out {
  display: block;
  min-height: 1.6em;
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink-dark);
  margin: 0 0 8px;
  white-space: pre-wrap;
}

.ask__out:empty { display: none; }

.ask__out--thinking,
.ask__out[data-state="thinking"] {
  color: var(--ink-mid);
  font-style: italic;
}

.ask__out[data-state="err"],
.ask__out[data-state="rate"] {
  color: var(--ink-mid);
}

.ask__note {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-mid);
  margin: 0;
  letter-spacing: 0.02em;
}

@media (prefers-reduced-motion: reduce) {
  .ask__pulse { animation: none; opacity: 0.7; }
  .ask__send { transition: none; }
  .ask__send:hover { transform: none; }
}

/* ---------- Close section (final conversion strip) ---------- */

.close {
  margin: 80px 0 0;
  padding: 40px 24px;
  background: var(--tone-1);
  border: 1px solid var(--rule);
  border-radius: var(--radius-brand);
  text-align: center;
}

.close__head {
  font-family: var(--mono);
  font-weight: 500;
  font-size: 22px;
  line-height: 1.25;
  color: var(--ink-dark);
  margin: 0 0 12px;
}

.close__sub {
  font-family: var(--sans);
  font-size: 15px;
  color: var(--ink-mid);
  margin: 0 auto 24px;
  max-width: 56ch;
}

/* ---------- Team roster (two-person page) ---------- */

.team-roster {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin: 32px 0 48px;
}

.member {
  padding: 24px;
  background: var(--tone-1);
  border: 1px solid var(--rule);
  border-radius: var(--radius-brand);
}

.member__name {
  font-family: var(--mono);
  font-weight: 500;
  font-size: 20px;
  color: var(--ink-dark);
  margin: 0 0 4px;
}

.member__handle {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-mid);
  margin: 0 0 16px;
}

.member__handle a {
  color: var(--ink-mid);
  text-decoration-color: var(--ink-mid);
}

.member__handle a:hover {
  color: var(--ink-dark);
  text-decoration-color: var(--ink-dark);
}

.member__bio {
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.55;
  color: var(--ink-dark);
  margin: 0;
}

@media (max-width: 640px) {
  .team-roster { grid-template-columns: 1fr; }
  .close { padding: 32px 20px; }
  .close__head { font-size: 18px; }
  .hero-cta { gap: 10px; }
}

/* ---------- Tooltip ---------- */

.tip {
  position: absolute;
  z-index: 50;
  transform: translateX(-50%);
  max-width: 260px;
  padding: 8px 12px;
  background: var(--ink-dark);
  color: var(--page-bg);
  font-family: var(--sans);
  font-size: 12px;
  line-height: 1.4;
  border-radius: var(--radius-distant);
  pointer-events: none;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
  animation: tip-fade 120ms ease-out both;
}

@keyframes tip-fade {
  from { opacity: 0; transform: translate(-50%, -2px); }
  to   { opacity: 1; transform: translate(-50%, 0); }
}

@media (prefers-reduced-motion: reduce) {
  .tip { animation: none; }
}

/* ---------- Footer easter egg ---------- */

.footer__ps {
  color: var(--ink-mid);
  font-family: var(--sans);
  font-size: 12px;
  animation: ps-fade 1200ms ease-out both;
}

@keyframes ps-fade {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  .footer__ps { animation: none; }
}

/* ---------- Product card CTA arrow row ---------- */

.product__cta {
  display: inline-block;
  margin-top: 14px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-dark);
  border-bottom: 1px solid var(--ink-mid);
  padding-bottom: 2px;
  transition: border-color 120ms ease;
}

.product:hover .product__cta {
  border-color: var(--ink-dark);
}

/* ---------- Pill "breathing" (subtle life on status chips) ---------- */

.pill--live,
.pill--beta {
  animation: pill-breathe 4s ease-in-out infinite;
}

@keyframes pill-breathe {
  0%, 100% { opacity: 0.85; }
  50%      { opacity: 1.0; }
}

@media (prefers-reduced-motion: reduce) {
  .pill--live, .pill--beta { animation: none; opacity: 1; }
}

/* ---------- Boot sequence (the SICP/Scheme console intro) ---------- */

.boot {
  margin: 0 0 24px;
  padding: 0;
  user-select: none;
}

.boot__seq {
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.55;
  color: var(--ink-mid);
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
}

.boot__line,
.boot__prompt {
  display: inline;     /* <pre> already preserves the \n separating each line */
  opacity: 0;
  animation: boot-line-in 320ms ease-out forwards;
}

.boot__seq .boot__line:nth-child(1) { animation-delay: 0ms;   }
.boot__seq .boot__line:nth-child(2) { animation-delay: 220ms; }
.boot__seq .boot__prompt            { animation-delay: 520ms; color: var(--ink-dark); }

@keyframes boot-line-in {
  from { opacity: 0; transform: translateY(2px); }
  to   { opacity: 1; transform: translateY(0); }
}

.boot__cursor {
  display: inline-block;
  width: 0.6ch;
  color: var(--ink-dark);
  transition: opacity 80ms linear;
}

@media (prefers-reduced-motion: reduce) {
  .boot__line, .boot__prompt {
    animation: none;
    opacity: 1;
    transform: none;
  }
  .boot__cursor { opacity: 1; }
}

@media (max-width: 640px) {
  .boot__seq { font-size: 11px; }
}

/* ---------- Hero sub-deck (the SRE/UNIX positioning paragraph) ---------- */

.home-hero__deck {
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink-mid);
  margin: 20px 0 0;
  max-width: 62ch;
}

@media (max-width: 640px) {
  .home-hero__deck { font-size: 14px; }
}

/* ---------- Ask widget — shell prompt ---------- */

.ask__prompt {
  display: inline-flex;
  align-items: center;
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 500;
  color: var(--ink-mid);
  padding: 0 4px 0 2px;
  user-select: none;
}

/* ---------- Lineage block (the "how we got here" paragraph) ---------- */

.lineage {
  margin: 8px 0 0;
}

.lineage p {
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink-dark);
  max-width: 72ch;
  margin: 0 0 16px;
}

.lineage p:last-child { margin-bottom: 0; }

.lineage__roster {
  font-family: var(--mono);
  font-size: 13.5px;
  color: var(--ink-dark);
  letter-spacing: 0.005em;
}

/* ---------- Epigram block (the Perlis SICP-foreword pull-quote) ---------- */

.epigram {
  margin: 80px auto 0;
  padding: 32px 28px;
  max-width: 720px;
  border-top:    1px solid var(--ink-mid);
  border-bottom: 1px solid var(--ink-mid);
  background: transparent;
}

.epigram__q {
  margin: 0;
  padding: 0;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink-dark);
  font-style: italic;
}

.epigram__q p {
  margin: 0 0 14px;
  max-width: none;
}

.epigram__q p:last-child { margin-bottom: 0; }

.epigram__cite {
  display: block;
  margin: 18px 0 0;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-mid);
  letter-spacing: 0.01em;
  text-align: right;
}

@media (max-width: 640px) {
  .epigram { padding: 24px 20px; margin-top: 56px; }
  .epigram__q { font-size: 15px; line-height: 1.65; }
}

/* ---------- Hero-positioned epigram + about block ---------- */

/* When the Perlis epigram sits inside the hero (right under the tagline),
   pull the top margin in so it doesn't push the CTAs off the fold. */
.epigram--hero {
  margin: 32px 0 24px;
}

.about {
  margin: 0 0 24px;
}

.about p {
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink-dark);
  max-width: 70ch;
  margin: 0;
}

/* Tighter section head when used inline inside the hero stack. */
.section-head--inline {
  margin: 0 0 8px;
}

/* ---------- Shibboleth (rotating one-liner in the footer) ---------- */

.shibboleth {
  margin: 8px 0 0;
  font-family: var(--sans);
  font-size: 12px;
  color: var(--ink-mid);
  font-style: italic;
  line-height: 1.5;
  max-width: 72ch;
}

.shibboleth__q { color: var(--ink-mid); }

.shibboleth__cite {
  font-style: normal;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.02em;
  color: var(--ink-mid);
}

/* ---------- Reduced motion ---------- */

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