/* ============================================================
   Build 2026 AI Builder Atlas — "Engineering Atlas / Control Room"
   Display: Bricolage Grotesque · Body: Hanken Grotesk · Data: IBM Plex Mono
   ============================================================ */

:root {
  color-scheme: dark;

  /* surfaces — Build pure-black canvas */
  --void: #000000;
  --ink-0: #0a0a0d;
  --ink-1: #101015;
  --ink-2: #16161d;
  --line: rgba(255, 255, 255, 0.09);
  --line-bright: rgba(255, 255, 255, 0.22);

  /* type */
  --chalk: #f3f4f7;
  --fog: #9aa1ad;
  --fog-dim: #6a7079;

  /* Build pixel rainbow */
  --build-red: #ff453a;
  --build-orange: #ff9f1a;
  --build-yellow: #ffce20;
  --build-green: #34d058;
  --build-blue: #2f88ff;
  --build-purple: #b15cff;
  --build-cyan: #1fd4c4;

  /* signal aliases mapped to the rainbow (primary UI accent = Build blue) */
  --azure: var(--build-blue); /* model + primary accent */
  --cyan: var(--build-green); /* context + secondary accent */
  --violet: var(--build-purple); /* tools */
  --amber: var(--build-yellow); /* harness */
  --magenta: var(--build-red); /* governance / live */
  --orange: var(--build-orange); /* dev substrate */
  --teal: var(--build-cyan); /* infrastructure */

  --display: "Bricolage Grotesque", ui-sans-serif, system-ui, sans-serif;
  --body: "Hanken Grotesk", ui-sans-serif, system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", monospace;
  --pixel: "Press Start 2P", ui-monospace, monospace;

  --shell: min(1240px, calc(100% - 48px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--void);
  color: var(--chalk);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.58;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* atmospheric blueprint grid + corner glows ----------------------------- */
.grid-field {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(
    120% 90% at 50% 0%,
    #000 30%,
    transparent 78%
  );
  mask-image: radial-gradient(120% 90% at 50% 0%, #000 30%, transparent 78%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -3;
  pointer-events: none;
  background:
    radial-gradient(
      54% 38% at 84% -6%,
      rgba(47, 136, 255, 0.16),
      transparent 60%
    ),
    radial-gradient(46% 34% at 4% 2%, rgba(255, 69, 58, 0.08), transparent 62%),
    radial-gradient(
      60% 46% at 50% 110%,
      rgba(177, 92, 255, 0.08),
      transparent 60%
    );
}

.grain {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.045;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ───────────────────────── global craft ───────────────────────── */
::selection {
  background: color-mix(in srgb, var(--build-blue) 36%, transparent);
  color: #fff;
}
:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--build-blue) 72%, #fff 8%);
  outline-offset: 3px;
  border-radius: 5px;
}
html {
  scrollbar-color: #23252e transparent;
}
::-webkit-scrollbar {
  width: 11px;
  height: 11px;
}
::-webkit-scrollbar-track {
  background: var(--void);
}
::-webkit-scrollbar-thumb {
  background: #23252e;
  border: 3px solid var(--void);
  border-radius: 999px;
}
::-webkit-scrollbar-thumb:hover {
  background: #313441;
}

/* smooth cross-page morphs — progressive enhancement, ignored where unsupported */
@view-transition {
  navigation: auto;
}

/* ───────────────────────── masthead ───────────────────────── */
.masthead {
  position: sticky;
  top: 0;
  z-index: 50;
  width: 100%;
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 14px max(24px, calc((100% - 1240px) / 2 + 24px));
  background: color-mix(in srgb, var(--void) 72%, transparent);
  backdrop-filter: blur(14px) saturate(1.3);
  border-bottom: 1px solid var(--line);
  view-transition-name: masthead;
}

.repo-tag {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--mono);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--chalk);
  text-decoration: none;
}
.repo-tag .dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--magenta);
  box-shadow:
    0 0 0 4px rgba(255, 61, 139, 0.16),
    0 0 14px var(--magenta);
  animation: pulse 2.6s ease-in-out infinite;
}
@keyframes pulse {
  50% {
    opacity: 0.45;
  }
}

/* pixel mini-mark in the header — site-wide brand cue */
.bm-mini {
  font-family: var(--pixel);
  font-size: 0.62rem;
  letter-spacing: 0.06em;
  line-height: 1;
  background: linear-gradient(
    92deg,
    var(--build-red),
    var(--build-orange) 22%,
    var(--build-yellow) 40%,
    var(--build-green) 60%,
    var(--build-blue) 80%,
    var(--build-purple)
  );
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}
.repo-tag .path {
  color: var(--fog);
}

.mast-nav {
  margin-left: auto;
  display: flex;
  gap: 6px;
}
.mast-nav a {
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--fog);
  text-decoration: none;
  padding: 6px 11px;
  border-radius: 7px;
  transition:
    color 0.2s,
    background 0.2s;
}
.mast-nav a:hover {
  color: var(--chalk);
  background: rgba(120, 170, 255, 0.08);
}

.mast-stamp {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--fog-dim);
  white-space: nowrap;
}

/* shared layout ------------------------------------------------------- */
main {
  width: var(--shell);
  margin: 0 auto;
}

section {
  padding: 78px 0;
  border-bottom: 1px solid var(--line);
}

.section-head {
  max-width: 760px;
  margin-bottom: 40px;
}
.section-no {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  color: var(--magenta);
  margin-bottom: 14px;
}
.section-head h2 {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(1.7rem, 3.4vw, 2.7rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
}
.section-head > p {
  color: var(--fog);
  font-size: 1.05rem;
  margin: 0;
}

/* ───────────────────────── hero ───────────────────────── */
.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(64px, 12vh, 132px) 0 86px;
  border-bottom: 1px solid var(--line);
}
/* signature atmosphere — a slow aurora that breathes behind the wordmark */
.hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  left: -12%;
  top: -24%;
  width: 78%;
  height: 132%;
  background:
    radial-gradient(
      40% 42% at 32% 30%,
      rgba(47, 136, 255, 0.24),
      transparent 70%
    ),
    radial-gradient(
      36% 38% at 58% 42%,
      rgba(177, 92, 255, 0.17),
      transparent 70%
    ),
    radial-gradient(
      32% 36% at 44% 64%,
      rgba(31, 212, 196, 0.14),
      transparent 72%
    ),
    radial-gradient(28% 30% at 70% 58%, rgba(255, 69, 58, 0.1), transparent 72%);
  filter: blur(38px) saturate(1.2);
  pointer-events: none;
  /* pointer parallax (set on .hero by atlas.js) composes with the drift transform */
  translate: var(--px, 0) var(--py, 0);
  transition: translate 0.4s cubic-bezier(0.22, 1, 0.36, 1);
  animation: aurora-drift 19s ease-in-out infinite alternate;
}
@keyframes aurora-drift {
  0% {
    transform: translate3d(0, 0, 0) scale(1);
  }
  50% {
    transform: translate3d(4%, 3%, 0) scale(1.08);
  }
  100% {
    transform: translate3d(-3%, 5%, 0) scale(1.05);
  }
}

.kicker {
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 26px;
}
.kicker-mark {
  color: var(--magenta);
}

/* pixel BUILD wordmark — the brand centerpiece */
.buildmark {
  display: flex;
  align-items: flex-end;
  gap: clamp(14px, 2.4vw, 30px);
  margin: 4px 0 30px;
  line-height: 1;
  /* subtle counter-parallax to the aurora for depth */
  translate: calc(var(--px, 0px) * -0.32) calc(var(--py, 0px) * -0.32);
  transition: translate 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}
.bm-word {
  font-family: var(--pixel);
  font-size: clamp(2.6rem, 11vw, 8.2rem);
  letter-spacing: 0.04em;
  /* the Build rainbow, swept across the pixel letters */
  background: linear-gradient(
    92deg,
    var(--build-red) 0%,
    var(--build-orange) 18%,
    var(--build-yellow) 36%,
    var(--build-green) 56%,
    var(--build-blue) 76%,
    var(--build-purple) 100%
  );
  background-size: 220% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 6px 34px rgba(47, 136, 255, 0.34));
  animation: bm-flow 16s ease-in-out infinite alternate;
}
@keyframes bm-flow {
  0% {
    background-position: 0% 50%;
  }
  100% {
    background-position: 100% 50%;
  }
}
/* cinematic entrance for the wordmark — rise + unblur (reuses .reveal timing) */
.buildmark.reveal {
  animation-name: rise-hero;
}
@keyframes rise-hero {
  from {
    opacity: 0;
    transform: translateY(26px) scale(0.985);
    filter: blur(9px);
  }
  to {
    opacity: 1;
    transform: none;
    filter: blur(0);
  }
}
.bm-year {
  font-family: var(--pixel);
  font-size: clamp(0.9rem, 3vw, 2rem);
  color: var(--build-blue);
  padding-bottom: clamp(6px, 1.4vw, 16px);
  letter-spacing: 0.02em;
}

.hero h1 {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(2rem, 5.2vw, 4rem);
  line-height: 0.98;
  letter-spacing: -0.03em;
  margin: 0 0 26px;
}

/* personal narrative — the framing of the whole page */
.manifesto {
  margin: 0 0 30px;
  padding: 0 0 0 22px;
  border-left: 3px solid var(--build-blue);
  max-width: 760px;
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(1.15rem, 2vw, 1.6rem);
  line-height: 1.42;
  letter-spacing: -0.01em;
  color: var(--chalk);
  text-wrap: balance;
}

.lede {
  max-width: 720px;
  font-size: clamp(1.05rem, 1.7vw, 1.28rem);
  color: var(--fog);
  margin: 0 0 42px;
}
.lede strong {
  color: var(--chalk);
  font-weight: 600;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.btn {
  font-family: var(--mono);
  font-size: 0.84rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-decoration: none;
  padding: 13px 22px;
  border-radius: 10px;
  transition:
    transform 0.18s,
    box-shadow 0.25s,
    background 0.25s;
}
.btn-primary {
  color: #060810;
  background: linear-gradient(100deg, var(--cyan), var(--azure));
  box-shadow: 0 8px 30px rgba(77, 140, 255, 0.28);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 38px rgba(77, 140, 255, 0.42);
}
.btn-ghost {
  color: var(--chalk);
  border: 1px solid var(--line-bright);
  background: rgba(120, 170, 255, 0.04);
}
.btn-ghost:hover {
  transform: translateY(-2px);
  border-color: var(--cyan);
  color: var(--cyan);
}

/* ───────────────────── schematic ───────────────────── */
.schematic {
  display: grid;
  gap: 14px;
  position: relative;
}

.band {
  position: relative;
  border-radius: 14px;
  padding: 20px 24px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--ink-1), var(--ink-0));
  overflow: hidden;
}
.band header {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}
.band-edge {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  padding: 3px 9px;
  border-radius: 6px;
  border: 1px solid currentColor;
}
.band h3 {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.18rem;
  letter-spacing: -0.01em;
  margin: 0;
}
.band p {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--fog);
}
.band::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.5;
}

.band-gov {
  border-color: color-mix(in srgb, var(--build-red) 36%, transparent);
}
.band-gov .band-edge {
  color: var(--build-red);
}
.band-gov::before {
  background: radial-gradient(
    80% 140% at 0% 0%,
    color-mix(in srgb, var(--build-red) 14%, transparent),
    transparent 55%
  );
}

.band-dev {
  border-color: color-mix(in srgb, var(--build-orange) 34%, transparent);
}
.band-dev .band-edge {
  color: var(--build-orange);
}
.band-dev::before {
  background: radial-gradient(
    80% 140% at 100% 0%,
    color-mix(in srgb, var(--build-orange) 14%, transparent),
    transparent 55%
  );
}

.band-infra {
  border-color: color-mix(in srgb, var(--build-cyan) 34%, transparent);
}
.band-infra .band-edge {
  color: var(--build-cyan);
}
.band-infra::before {
  background: radial-gradient(
    80% 140% at 50% 100%,
    color-mix(in srgb, var(--build-cyan) 14%, transparent),
    transparent 55%
  );
}

/* core four */
.core {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.cell {
  position: relative;
  border-radius: 14px;
  padding: 22px 20px 24px;
  background: linear-gradient(180deg, var(--ink-2), var(--ink-0));
  border: 1px solid var(--line);
  display: grid;
  align-content: start;
  gap: 10px;
  overflow: hidden;
  transition:
    transform 0.25s,
    border-color 0.25s,
    box-shadow 0.3s;
}
.cell::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--c);
  opacity: 0.9;
}
.cell:hover {
  border-color: color-mix(in srgb, var(--c) 45%, var(--line));
  box-shadow: 0 16px 40px color-mix(in srgb, var(--c) 14%, transparent);
}
.cell-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 4px;
}
.cell-no {
  flex: none;
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.2rem;
  color: #050505;
  background: var(--c);
  box-shadow: 0 0 22px color-mix(in srgb, var(--c) 45%, transparent);
}
.cell h3 {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.28rem;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--c);
}
.ask {
  margin: 2px 0 0;
  font-weight: 500;
  font-size: 0.82rem;
  color: var(--fog);
}

/* linked capability rows — one scannable, clickable item per line */
.cap-list {
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
  display: grid;
  gap: 5px;
}
.cap-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 11px;
  border-radius: 9px;
  font-size: 0.86rem;
  line-height: 1.25;
  color: var(--chalk);
  text-decoration: none;
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid var(--line);
  border-left: 2px solid color-mix(in srgb, var(--c) 60%, transparent);
  transition:
    background 0.16s,
    border-color 0.16s,
    transform 0.16s;
}
.cap-list a:hover {
  background: color-mix(in srgb, var(--c) 12%, transparent);
  border-color: color-mix(in srgb, var(--c) 40%, var(--line));
  border-left-color: var(--c);
  transform: translateX(3px);
}
.cap-arrow {
  flex: none;
  font-size: 0.82rem;
  color: var(--fog-dim);
  transition: color 0.16s;
}
.cap-list a:hover .cap-arrow {
  color: var(--c);
}
.cell-model {
  --c: var(--azure);
}
.cell-context {
  --c: var(--cyan);
}
.cell-tools {
  --c: var(--violet);
}
.cell-harness {
  --c: var(--amber);
}

/* band cap-lists lay their linked rows out in responsive columns */
.band-caps {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 6px;
  margin-top: 6px;
}
.band-gov {
  --c: var(--build-red);
}
.band-dev {
  --c: var(--build-orange);
}
.band-infra {
  --c: var(--build-cyan);
}

/* sub-groups — cluster related capabilities into labelled sub-verticals */
.subgroups {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(256px, 1fr));
  gap: 12px;
  margin-top: 8px;
  align-items: start;
}
.subgroup {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 14px 12px;
  background: rgba(255, 255, 255, 0.018);
}
.sg-head {
  display: flex;
  flex-wrap: nowrap;
  align-items: start;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 10px;
  margin-bottom: 8px;
  border-bottom: 1px solid var(--line);
}
.sg-title {
  flex: 1;
  min-width: 0;
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1.25;
  text-transform: uppercase;
  color: var(--c, var(--chalk));
}
.sg-count {
  flex: none;
}
.sg-count {
  font-family: var(--mono);
  font-size: 0.66rem;
  line-height: 1;
  color: var(--fog);
  padding: 4px 8px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--c) 10%, transparent);
}
.sg-list {
  margin: 0;
}

.read-key {
  margin-top: 34px;
  padding: 24px 26px;
  border-radius: 14px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  background: var(--ink-0);
}
.read-key p {
  margin: 0;
  color: var(--fog);
  font-size: 1rem;
}
.read-key strong {
  color: var(--chalk);
}
.read-key em {
  font-style: normal;
  color: var(--cyan);
  font-weight: 600;
}

/* ───────────────────── repo grid ───────────────────── */
.repo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.rcard {
  display: grid;
  align-content: start;
  gap: 9px;
  padding: 24px 22px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--ink-0);
  text-decoration: none;
  color: var(--chalk);
  position: relative;
  transition:
    transform 0.22s,
    border-color 0.22s,
    background 0.22s;
}
.rcard:hover {
  transform: translateY(-3px);
  border-color: var(--line-bright);
  background: var(--ink-1);
}
.rcard-no {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--azure);
}
.rcard h3 {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.22rem;
  letter-spacing: -0.01em;
  margin: 0;
}
.rcard p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--fog);
}
.rcard-go {
  margin-top: 6px;
  font-family: var(--mono);
  font-size: 0.76rem;
  color: var(--fog-dim);
  transition: color 0.22s;
}
.rcard:hover .rcard-go {
  color: var(--cyan);
}

/* ───────────────────── track list ───────────────────── */
.track-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  background: var(--ink-0);
}
.track {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
  padding: 24px 28px;
  border-bottom: 1px solid var(--line);
  transition: background 0.22s;
}
.track:last-child {
  border-bottom: 0;
}
.track:hover {
  background: var(--ink-1);
}
.track-no {
  font-family: var(--mono);
  font-size: 1.05rem;
  color: var(--fog-dim);
}
.track-body h3 {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.28rem;
  letter-spacing: -0.01em;
  margin: 0 0 5px;
}
.track-q {
  margin: 0;
  color: var(--fog);
  font-size: 0.96rem;
}
.track-a {
  margin: 6px 0 0;
  font-size: 0.92rem;
  color: var(--chalk);
}
.track-a::before {
  content: "→ ";
  color: var(--cyan);
  font-family: var(--mono);
}
.track-layer {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  padding: 5px 11px;
  border-radius: 999px;
  border: 1px solid currentColor;
  white-space: nowrap;
}
.track-layer[data-layer="tools"] {
  color: var(--violet);
}
.track-layer[data-layer="context"] {
  color: var(--cyan);
}
.track-layer[data-layer="harness"] {
  color: var(--amber);
}
.track-layer[data-layer="gov"] {
  color: var(--magenta);
}

/* ───────────────────── sources ───────────────────── */
.source-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
}
.source-list a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 17px 22px;
  background: var(--ink-0);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--fog-dim);
  transition:
    background 0.2s,
    color 0.2s;
}
.source-list a span {
  font-family: var(--body);
  font-size: 0.96rem;
  font-weight: 500;
  color: var(--chalk);
}
.source-list a:hover {
  background: var(--ink-1);
  color: var(--cyan);
}
.source-list a:hover span {
  color: var(--cyan);
}

/* ───────────────────── footer ───────────────────── */
.foot {
  width: var(--shell);
  margin: 0 auto;
  padding: 56px 0 80px;
  display: grid;
  gap: 26px;
}
.foot-note {
  display: grid;
  gap: 10px;
  max-width: 760px;
  padding: 22px 24px;
  border-radius: 14px;
  border: 1px solid rgba(255, 61, 139, 0.28);
  background: linear-gradient(180deg, rgba(255, 61, 139, 0.05), transparent);
}
.lock {
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  color: var(--magenta);
}
.foot-note p {
  margin: 0;
  color: var(--fog);
  font-size: 0.95rem;
}
.foot-note code {
  font-family: var(--mono);
  font-size: 0.86em;
  color: var(--chalk);
  background: rgba(120, 170, 255, 0.1);
  padding: 1px 6px;
  border-radius: 5px;
}
.foot-sig {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--fog-dim);
}
.foot-by {
  margin: 8px 0 0;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--fog-dim);
}
.foot-feedback {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 4px 10px;
  border: 1px solid rgba(174, 238, 255, 0.22);
  border-radius: 999px;
  background: rgba(174, 238, 255, 0.06);
  color: var(--fog);
  text-decoration: none;
  transition:
    border-color 0.2s,
    color 0.2s,
    background 0.2s;
}
.foot-feedback:hover {
  border-color: rgba(174, 238, 255, 0.42);
  background: rgba(174, 238, 255, 0.1);
  color: var(--chalk);
}

/* ───────────────────── enhancements ───────────────────── */
/* scroll-progress bar — a thin rainbow seam at the very top */
.scroll-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(
    90deg,
    var(--build-red),
    var(--build-orange),
    var(--build-yellow),
    var(--build-green),
    var(--build-blue),
    var(--build-purple)
  );
  z-index: 60;
  pointer-events: none;
  will-change: transform;
}

/* deep-link landing pulse — confirms "you are here" on an anchored card */
.target-pulse {
  animation: target-pulse 1.7s cubic-bezier(0.22, 1, 0.36, 1);
}
@keyframes target-pulse {
  0%,
  100% {
    box-shadow: 0 0 0 0 transparent;
  }
  16% {
    box-shadow:
      0 0 0 2px
        color-mix(in srgb, var(--jc, var(--sc, var(--azure))) 65%, transparent),
      0 18px 50px
        color-mix(in srgb, var(--jc, var(--sc, var(--azure))) 22%, transparent);
  }
}

/* living flow rail — stages light up in sequence when the rail scrolls in */
.flow-rail.lit .flow-stage {
  animation: stage-pop 0.5s cubic-bezier(0.22, 1, 0.36, 1) both;
  animation-delay: calc(var(--si, 0) * 90ms);
}
@keyframes stage-pop {
  0% {
    transform: translateY(3px);
  }
  45% {
    transform: translateY(-3px);
    border-bottom-color: var(--jc);
    box-shadow: 0 6px 18px color-mix(in srgb, var(--jc) 32%, transparent);
  }
  100% {
    transform: none;
  }
}

/* samples layer filter */
.sample-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 0;
}
.filter-chip {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fog);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 7px 14px;
  cursor: pointer;
  transition:
    color 0.2s,
    border-color 0.2s,
    background 0.2s;
}
.filter-chip:hover {
  color: var(--chalk);
  border-color: var(--line-bright);
}
.filter-chip[aria-pressed="true"] {
  color: #060810;
  background: var(--chalk);
  border-color: transparent;
  font-weight: 600;
}
.sample-card.filtered-out {
  display: none;
}

/* scroll-assembled schematic — bands & cells settle into place on scroll */
.schematic .band.reveal-up {
  transform: translateY(30px) scale(0.99);
}
.schematic .band-gov.reveal-up {
  transform: translateY(26px) translateX(-16px);
}
.schematic .band-infra.reveal-up {
  transform: translateY(26px) translateX(16px);
}
.schematic .core .cell.reveal-up {
  transform: translateY(34px) scale(0.965);
}
.schematic .band.reveal-up.in,
.schematic .core .cell.reveal-up.in {
  transform: none;
}

/* ───────────────────── motion ───────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  animation: rise 0.8s cubic-bezier(0.22, 1, 0.36, 1) forwards;
  animation-delay: calc(var(--d, 0) * 110ms + 80ms);
}
.reveal[data-d="0"] {
  --d: 0;
}
.reveal[data-d="1"] {
  --d: 1;
}
.reveal[data-d="2"] {
  --d: 2;
}
.reveal[data-d="3"] {
  --d: 3;
}
.reveal[data-d="4"] {
  --d: 4;
}
.reveal[data-d="5"] {
  --d: 5;
}
.reveal[data-d="6"] {
  --d: 6;
}

@keyframes rise {
  to {
    opacity: 1;
    transform: none;
  }
}

.reveal-up {
  opacity: 0;
  transform: translateY(26px);
  transition:
    opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  transition-delay: var(--stagger, 0ms);
}
.reveal-up.in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .reveal,
  .reveal-up {
    opacity: 1;
    transform: none;
    animation: none;
    transition: none;
  }
  .repo-tag .dot,
  .hero::before,
  .bm-word {
    animation: none;
  }
  ::view-transition-group(*),
  ::view-transition-old(*),
  ::view-transition-new(*) {
    animation: none !important;
  }
  .flow-rail.lit .flow-stage,
  .target-pulse {
    animation: none !important;
  }
  .hero::before,
  .buildmark {
    translate: none;
  }
}

/* ───────────────────── responsive ───────────────────── */
@media (max-width: 940px) {
  .core {
    grid-template-columns: repeat(2, 1fr);
  }
  .repo-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }
  :root {
    --shell: calc(100% - 32px);
  }
  .masthead {
    flex-wrap: wrap;
    gap: 10px 16px;
  }
  .mast-stamp {
    display: none;
  }
  .mast-nav {
    margin-left: auto;
    gap: 2px;
  }
  .mast-nav a {
    padding: 6px 9px;
    font-size: 0.72rem;
  }
  section {
    padding: 56px 0;
  }
  .core,
  .repo-grid,
  .source-list {
    grid-template-columns: 1fr;
  }
  .track {
    grid-template-columns: auto 1fr;
    gap: 14px 18px;
  }
  .track-layer {
    grid-column: 2;
    justify-self: start;
  }
  .band p {
    font-size: 0.74rem;
  }
}

/* ============================================================
   MULTI-PAGE COMPONENTS
   ============================================================ */

/* active nav state */
.mast-nav a[aria-current="page"] {
  color: var(--chalk);
  background: rgba(120, 170, 255, 0.1);
}
.mast-nav a[aria-current="page"]::after {
  content: "";
  display: block;
  height: 2px;
  margin-top: 3px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--azure));
}

/* inline links inside copy */
.inline-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(44, 224, 192, 0.35);
  white-space: nowrap;
  transition: border-color 0.2s;
}
.inline-link:hover {
  border-color: var(--cyan);
}

/* ───────── home: routing cards ───────── */
.route-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.route-card {
  position: relative;
  display: grid;
  align-content: start;
  gap: 10px;
  padding: 28px 24px 26px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--ink-1), var(--ink-0));
  text-decoration: none;
  color: var(--chalk);
  overflow: hidden;
  transition:
    transform 0.22s,
    border-color 0.22s;
}
.route-card::after {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--rc, var(--azure));
}
.route-card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--rc) 55%, var(--line));
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.05),
    0 18px 44px color-mix(in srgb, var(--rc) 15%, transparent);
}
.route-stack {
  --rc: var(--azure);
}
.route-samples {
  --rc: var(--violet);
}
.route-sources {
  --rc: var(--cyan);
}
.route-no {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--rc);
}
.route-card h3 {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: -0.01em;
  margin: 0;
}
.route-card p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--fog);
}
.route-go {
  margin-top: 6px;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--rc);
}
.route-go::after {
  content: " →";
  display: inline-block;
  transition: transform 0.22s cubic-bezier(0.22, 1, 0.36, 1);
}
.route-card:hover .route-go::after {
  transform: translateX(5px);
}

/* ───────── footer nav ───────── */
.foot-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 4px;
}
.foot-links a {
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--fog);
  text-decoration: none;
  padding: 6px 11px;
  border-radius: 7px;
  transition:
    color 0.2s,
    background 0.2s;
}
.foot-links a:hover {
  color: var(--chalk);
  background: rgba(120, 170, 255, 0.08);
}

/* ───────── inner page header ───────── */
.page-head {
  padding: clamp(48px, 9vh, 96px) 0 44px;
  border-bottom: 1px solid var(--line);
}
.page-head h1 {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(2.3rem, 6vw, 4.4rem);
  line-height: 0.96;
  letter-spacing: -0.03em;
  margin: 0 0 22px;
  max-width: 16ch;
}
/* layer jump nav */
.layer-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 30px;
}
.layer-jump a {
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--fog);
  text-decoration: none;
  padding: 7px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  transition:
    color 0.2s,
    border-color 0.2s,
    background 0.2s;
}
.layer-jump a:hover {
  color: var(--chalk);
  border-color: var(--line-bright);
  background: rgba(120, 170, 255, 0.06);
}

/* ───────── layer stack (stack.html) ───────── */
.layer-stack {
  padding: 50px 0;
  display: grid;
  gap: 16px;
  border-bottom: 1px solid var(--line);
}
.layer-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 28px;
  scroll-margin-top: 92px;
  padding: 26px 26px 28px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: var(--ink-0);
  position: relative;
  overflow: hidden;
}
.layer-row::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--lc, var(--line-bright));
}
.layer-tag {
  display: grid;
  align-content: start;
  gap: 12px;
}
.layer-plane {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--lc, var(--fog));
}
.layer-idx {
  font-size: 1.4rem;
  color: var(--lc, var(--fog-dim));
  opacity: 0.8;
}
.layer-idx.big {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.7rem;
  color: #060810;
  background: var(--lc);
  box-shadow: 0 0 26px color-mix(in srgb, var(--lc) 45%, transparent);
  opacity: 1;
}
.layer-main h2 {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(1.4rem, 2.6vw, 2rem);
  letter-spacing: -0.015em;
  margin: 0 0 6px;
  color: var(--lc, var(--chalk));
}
.layer-ask {
  margin: 0 0 12px;
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--chalk);
}
.layer-note {
  margin: 0 0 16px;
  color: var(--fog);
  font-size: 0.98rem;
  max-width: 64ch;
}
.chiplist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}
.chiplist li {
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--fog);
  padding: 5px 11px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(120, 170, 255, 0.03);
}
.layer-sample {
  margin: 16px 0 0;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--fog-dim);
}
.layer-sample a {
  color: var(--lc, var(--cyan));
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}
.layer-journeys {
  margin: 12px 0 0;
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--fog-dim);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
.layer-journeys a {
  color: var(--lc, var(--fog));
  text-decoration: none;
  padding: 2px 9px;
  border: 1px solid color-mix(in srgb, var(--lc, var(--fog)) 32%, var(--line));
  border-radius: 999px;
  transition:
    background 0.2s,
    color 0.2s;
}
.layer-journeys a:hover {
  background: color-mix(in srgb, var(--lc, var(--fog)) 16%, transparent);
  color: var(--chalk);
}

/* plane / core color binding */
.plane-gov {
  --lc: var(--magenta);
}
.plane-dev {
  --lc: var(--violet);
}
.plane-infra {
  --lc: var(--cyan);
}
.row-model {
  --lc: var(--azure);
}
.row-context {
  --lc: var(--cyan);
}
.row-tools {
  --lc: var(--violet);
}
.row-harness {
  --lc: var(--amber);
}
.core-row {
  background: linear-gradient(180deg, var(--ink-2), var(--ink-0));
}

/* cta strip */
.cta-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 40px 0 70px;
}
.cta-strip p {
  margin: 0;
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(1.3rem, 2.6vw, 1.9rem);
  letter-spacing: -0.01em;
}

/* ───────── maturity ladder ───────── */
.ladder {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 30px;
}
.rung {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--fog);
  padding: 8px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
}
.rung-on {
  color: #060810;
  background: linear-gradient(100deg, var(--cyan), var(--azure));
  border-color: transparent;
  font-weight: 600;
}
.rung-arrow {
  color: var(--fog-dim);
  font-family: var(--mono);
}

/* ───────── sample grid (samples.html) ───────── */
.sample-grid {
  padding: 50px 0 70px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.sample-card {
  --sc: var(--azure);
  display: grid;
  align-content: start;
  gap: 11px;
  padding: 24px 22px 22px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: var(--ink-0);
  scroll-margin-top: 92px;
  position: relative;
  overflow: hidden;
  transition:
    transform 0.22s,
    border-color 0.22s,
    box-shadow 0.3s;
}
.sample-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--sc);
}
.sample-card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--sc) 55%, var(--line));
  box-shadow: 0 16px 40px color-mix(in srgb, var(--sc) 18%, transparent);
}
.sample-card header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.sample-no {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.7rem;
  color: var(--sc);
  line-height: 1;
}
.sample-status {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fog);
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
}
.sample-card h2 {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.3rem;
  letter-spacing: -0.01em;
  margin: 2px 0 0;
}
.sample-q {
  margin: 0;
  color: var(--fog);
  font-size: 0.94rem;
}
.sample-a {
  margin: 0;
  font-size: 0.92rem;
  color: var(--chalk);
}
.sample-a::before {
  content: "→ ";
  color: var(--sc);
  font-family: var(--mono);
}
.sample-card footer {
  margin-top: 6px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}
.sample-links {
  display: inline-flex;
  align-items: center;
  gap: 9px;
}
.sample-jlink {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.04em;
  color: var(--sc);
  text-decoration: none;
  padding: 3px 8px;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--sc) 34%, var(--line));
  transition: background 0.2s;
}
.sample-jlink:hover {
  background: color-mix(in srgb, var(--sc) 16%, transparent);
}
.sample-layer {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  padding: 5px 11px;
  border-radius: 999px;
  border: 1px solid currentColor;
}
.sample-layer[data-layer="tools"] {
  color: var(--violet);
}
.sample-layer[data-layer="model"] {
  color: var(--azure);
}
.sample-layer[data-layer="context"] {
  color: var(--cyan);
}
.sample-layer[data-layer="dev"] {
  color: var(--orange);
}
.sample-layer[data-layer="harness"] {
  color: var(--amber);
}
.sample-layer[data-layer="infra"] {
  color: var(--teal);
}
.sample-layer[data-layer="gov"] {
  color: var(--magenta);
}
.sample-link {
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--fog-dim);
  text-decoration: none;
}
.sample-link:hover {
  color: var(--cyan);
}
.s-model {
  --sc: var(--azure);
}
.s-tools {
  --sc: var(--violet);
}
.s-context {
  --sc: var(--cyan);
}
.s-dev {
  --sc: var(--orange);
}
.s-harness {
  --sc: var(--amber);
}
.s-infra {
  --sc: var(--teal);
}
.s-gov {
  --sc: var(--magenta);
}
.sample-cta {
  --sc: var(--line-bright);
  align-content: center;
  gap: 14px;
  background: linear-gradient(180deg, var(--ink-1), var(--ink-0));
  border-style: dashed;
}
.sample-cta .btn {
  justify-self: start;
}

/* ───────── boundary (sources.html) ───────── */
.boundary-card {
  display: grid;
  gap: 14px;
  max-width: 820px;
  padding: 28px 30px;
  border-radius: 16px;
  border: 1px solid rgba(255, 61, 139, 0.3);
  background: linear-gradient(180deg, rgba(255, 61, 139, 0.06), transparent);
}
.boundary-card p {
  margin: 0;
  color: var(--fog);
  font-size: 1rem;
}
.boundary-card code {
  font-family: var(--mono);
  font-size: 0.86em;
  color: var(--chalk);
  background: rgba(120, 170, 255, 0.1);
  padding: 1px 6px;
  border-radius: 5px;
}
.boundary-foot {
  color: var(--chalk) !important;
  font-weight: 500;
}

/* ───────── builder journeys (journeys.html) ───────── */
.journey-grid {
  padding: 50px 0 70px;
  display: grid;
  gap: 18px;
}
.journey-card {
  --jc: var(--azure);
  position: relative;
  display: grid;
  align-content: start;
  gap: 16px;
  padding: 26px 26px 24px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--ink-1), var(--ink-0));
  scroll-margin-top: 92px;
  overflow: hidden;
  transition:
    transform 0.22s,
    border-color 0.22s,
    box-shadow 0.3s;
}
/* signature: top bar (vertical-stack origin) + left bar (horizontal journey) */
.journey-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--jc);
}
.journey-card::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--jc), transparent 85%);
  opacity: 0.7;
}
.journey-card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--jc) 55%, var(--line));
  box-shadow: 0 16px 40px color-mix(in srgb, var(--jc) 16%, transparent);
}
.journey-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.journey-id {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
}
.journey-no {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.7rem;
  line-height: 1;
  color: var(--jc);
}
.journey-card h2 {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.42rem;
  letter-spacing: -0.01em;
  margin: 0;
}
/* maturity badge — pill echoing .sample-status, 3 states */
.journey-badge {
  flex: none;
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  white-space: nowrap;
  padding: 5px 11px;
  border-radius: 999px;
  border: 1px solid currentColor;
  color: var(--fog);
}
.journey-badge[data-maturity="narrative"] {
  color: var(--fog);
}
.journey-badge[data-maturity="sketch"] {
  color: var(--amber);
}
.journey-badge[data-maturity="runnable"] {
  color: var(--build-green);
}
.journey-outcome {
  margin: 0;
  font-size: 1rem;
  color: var(--chalk);
}
.jo-label,
.jm-key {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fog-dim);
  margin-right: 10px;
}
.journey-outcome .jo-label {
  margin-bottom: 2px;
}
/* signature horizontal flow rail */
.flow-rail {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background:
    linear-gradient(
      90deg,
      color-mix(in srgb, var(--jc) 7%, transparent),
      transparent 60%
    ),
    rgba(255, 255, 255, 0.018);
}
.flow-stage {
  font-family: var(--mono);
  font-size: 0.78rem;
  line-height: 1.2;
  white-space: nowrap;
  color: var(--chalk);
  padding: 7px 12px;
  border-radius: 8px;
  border: 1px solid var(--line);
  border-bottom: 2px solid color-mix(in srgb, var(--jc) 55%, transparent);
  background: var(--ink-2);
}
.flow-stage-end {
  color: #060810;
  background: var(--jc);
  border-color: transparent;
  font-weight: 600;
}
.flow-arrow {
  flex: none;
  font-family: var(--mono);
  font-size: 0.9rem;
  color: var(--jc);
  opacity: 0.8;
}
.journey-meta {
  display: grid;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}
.jm-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px 10px;
}
.journey-samples {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 14px;
}
.journey-learn,
.journey-convo {
  margin: 0;
  font-size: 0.92rem;
  color: var(--fog);
}
.journey-convo {
  font-style: italic;
  color: var(--fog-dim);
}
/* layer chips reuse .chiplist; add data-layer coloring */
.journey-layers li {
  color: var(--fog);
}
.journey-layers li[data-layer="model"] {
  color: var(--azure);
  border-color: color-mix(in srgb, var(--azure) 34%, var(--line));
}
.journey-layers li[data-layer="context"] {
  color: var(--cyan);
  border-color: color-mix(in srgb, var(--cyan) 34%, var(--line));
}
.journey-layers li[data-layer="tools"] {
  color: var(--violet);
  border-color: color-mix(in srgb, var(--violet) 34%, var(--line));
}
.journey-layers li[data-layer="harness"] {
  color: var(--amber);
  border-color: color-mix(in srgb, var(--amber) 34%, var(--line));
}
.journey-layers li[data-layer="dev"] {
  color: var(--orange);
  border-color: color-mix(in srgb, var(--orange) 34%, var(--line));
}
.journey-layers li[data-layer="infra"] {
  color: var(--teal);
  border-color: color-mix(in srgb, var(--teal) 34%, var(--line));
}
.journey-layers li[data-layer="gov"] {
  color: var(--magenta);
  border-color: color-mix(in srgb, var(--magenta) 34%, var(--line));
}
/* per-journey accent binding — spans the Build rainbow across the 6 cards */
.j-build {
  --jc: var(--orange);
}
.j-tools {
  --jc: var(--violet);
}
.j-harness {
  --jc: var(--amber);
}
.j-context {
  --jc: var(--cyan);
}
.j-eval {
  --jc: var(--magenta);
}
.j-research {
  --jc: var(--azure);
}

/* ───────── home: builder journeys teasers ───────── */
.journey-teasers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.journey-teaser {
  --jc: var(--azure);
  position: relative;
  display: grid;
  align-content: start;
  gap: 9px;
  padding: 22px 20px 20px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--ink-1), var(--ink-0));
  text-decoration: none;
  color: var(--chalk);
  overflow: hidden;
  transition:
    transform 0.22s,
    border-color 0.22s;
}
.journey-teaser::after {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--jc);
}
.journey-teaser:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--jc) 55%, var(--line));
}
.jt-no {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--jc);
}
.journey-teaser h3 {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.18rem;
  letter-spacing: -0.01em;
  margin: 0;
}
.jt-chips {
  margin: 2px 0 0;
}
.jt-chips li {
  font-size: 0.68rem;
  padding: 3px 8px;
}
.jt-go {
  margin-top: 4px;
  font-family: var(--mono);
  font-size: 0.76rem;
  color: var(--jc);
  transition: transform 0.22s cubic-bezier(0.22, 1, 0.36, 1);
}
.journey-teaser:hover {
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.05),
    0 16px 38px color-mix(in srgb, var(--jc) 14%, transparent);
}
.journey-teaser:hover .jt-go {
  transform: translateX(4px);
}
.jt-build {
  --jc: var(--orange);
}
.jt-tools {
  --jc: var(--violet);
}
.jt-harness {
  --jc: var(--amber);
}
.jt-context {
  --jc: var(--cyan);
}
.jt-eval {
  --jc: var(--magenta);
}
.jt-research {
  --jc: var(--azure);
}

/* ───────── multi-page responsive ───────── */
@media (max-width: 940px) {
  .route-grid,
  .sample-grid,
  .journey-teasers {
    grid-template-columns: repeat(2, 1fr);
  }
  /* journey-grid stays single-column; rail switches to a swipeable strip */
  .flow-rail {
    flex-wrap: nowrap;
    overflow-x: auto;
    scroll-snap-type: x proximity;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
  }
  .flow-stage {
    scroll-snap-align: start;
  }
  .journey-head {
    align-items: flex-start;
  }
}

@media (max-width: 640px) {
  .route-grid,
  .sample-grid,
  .journey-teasers {
    grid-template-columns: 1fr;
  }
  .journey-card {
    padding: 22px 18px 20px;
  }
  .journey-meta .jm-row {
    align-items: flex-start;
  }
  .layer-row {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .layer-tag {
    grid-auto-flow: column;
    justify-content: start;
    align-items: center;
    gap: 14px;
  }
  .cta-strip {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ───────────────────── capability library (assets) ───────────────────── */
/* asset chips — Blog / Docs / Code, present = coloured, absent = dim "soon" */
.asset-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  text-decoration: none;
  padding: 5px 11px;
  border-radius: 8px;
  border: 1px solid var(--line);
  color: var(--fog);
  background: rgba(255, 255, 255, 0.02);
  transition:
    color 0.18s,
    border-color 0.18s,
    background 0.18s,
    transform 0.18s;
}
.asset-chip svg {
  width: 13px;
  height: 13px;
  flex: none;
}
.asset-chip.is-blog {
  color: var(--build-blue);
  border-color: color-mix(in srgb, var(--build-blue) 34%, var(--line));
}
.asset-chip.is-blog:hover {
  transform: translateY(-1px);
  background: color-mix(in srgb, var(--build-blue) 14%, transparent);
  border-color: var(--build-blue);
}
.asset-chip.is-docs {
  color: var(--build-green);
  border-color: color-mix(in srgb, var(--build-green) 34%, var(--line));
}
.asset-chip.is-docs:hover {
  transform: translateY(-1px);
  background: color-mix(in srgb, var(--build-green) 14%, transparent);
  border-color: var(--build-green);
}
.asset-chip.is-code {
  color: var(--build-orange);
  border-color: color-mix(in srgb, var(--build-orange) 34%, var(--line));
}
.asset-chip.is-code:hover {
  transform: translateY(-1px);
  background: color-mix(in srgb, var(--build-orange) 14%, transparent);
  border-color: var(--build-orange);
}
.asset-chip.is-soon {
  color: var(--fog-dim);
  border-style: dashed;
  background: transparent;
  cursor: default;
  opacity: 0.55;
}

/* maturity pill — L0 blog · L1 +docs/sample · L2 runnable · L3 governed */
.maturity-pill {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  padding: 3px 8px;
  border-radius: 999px;
  border: 1px solid currentColor;
  color: var(--fog);
  white-space: nowrap;
}
.maturity-pill[data-m="L0"] {
  color: var(--fog-dim);
}
.maturity-pill[data-m="L1"] {
  color: var(--build-yellow);
}
.maturity-pill[data-m="L2"] {
  color: var(--build-green);
}
.maturity-pill[data-m="L3"] {
  color: var(--build-cyan);
}

/* P1 — library cards */
.capability-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px;
  padding: 8px 0 70px;
}
.cap-card {
  --cc: var(--violet);
  position: relative;
  display: grid;
  align-content: start;
  gap: 11px;
  padding: 22px 22px 20px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--ink-1), var(--ink-0));
  overflow: hidden;
  transition:
    transform 0.22s,
    border-color 0.22s,
    box-shadow 0.3s;
}
.cap-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--cc);
}
.cap-card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--cc) 50%, var(--line));
  box-shadow: 0 16px 40px color-mix(in srgb, var(--cc) 14%, transparent);
}
.cap-card[data-layer="model"] {
  --cc: var(--azure);
}
.cap-card[data-layer="context"] {
  --cc: var(--cyan);
}
.cap-card[data-layer="tools"] {
  --cc: var(--violet);
}
.cap-card[data-layer="harness"] {
  --cc: var(--amber);
}
.cap-card[data-layer="dev"] {
  --cc: var(--orange);
}
.cap-card[data-layer="infra"] {
  --cc: var(--teal);
}
.cap-card[data-layer="gov"] {
  --cc: var(--magenta);
}
.cap-card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}
.cap-card h3 {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.14rem;
  letter-spacing: -0.01em;
  margin: 0;
  line-height: 1.15;
}
.cap-layer {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cc);
  margin-top: 6px;
}
.cap-blurb {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--fog);
}
.cap-assets {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 11px;
  border-top: 1px solid var(--line);
}
.cap-empty {
  color: var(--fog);
  font-family: var(--mono);
  font-size: 0.84rem;
  padding: 30px 0;
}

/* P2 — expand-in-place rows (native <details>) */
.cap-expand {
  border: 1px solid var(--line);
  border-left: 2px solid
    color-mix(in srgb, var(--c, var(--violet)) 60%, transparent);
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.025);
  overflow: hidden;
}
.cap-expand + .cap-expand {
  margin-top: 5px;
}
.cap-expand > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start; /* top-align the indicator when the label wraps */
  justify-content: space-between;
  gap: 12px;
  padding: 9px 11px;
  font-size: 0.86rem;
  color: var(--chalk);
  transition: color 0.16s;
}
.cap-expand > summary:hover {
  color: var(--chalk);
}
.cap-expand > summary::-webkit-details-marker {
  display: none;
}
.cap-sum-label {
  flex: 1;
  min-width: 0;
  line-height: 1.3;
}
.cap-expand[open] {
  border-left-color: var(--c, var(--violet));
  background: color-mix(in srgb, var(--c, var(--violet)) 9%, transparent);
}
/* 3-slot availability preview: blog / docs / code */
.cap-indicator {
  flex: none;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding-top: 4px;
}
.cap-dots {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.cap-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  box-sizing: border-box;
  transition:
    transform 0.16s,
    box-shadow 0.16s;
}
.cap-dot.off {
  border: 1px solid var(--fog-dim);
  opacity: 0.5;
}
.cap-dot.off-blog {
  border-color: color-mix(in srgb, var(--build-blue) 72%, var(--fog-dim));
}
.cap-dot.off-docs {
  border-color: color-mix(in srgb, var(--build-green) 72%, var(--fog-dim));
}
.cap-dot.off-code {
  border-color: color-mix(in srgb, var(--build-orange) 72%, var(--fog-dim));
}
.cap-dot.on-blog {
  background: var(--build-blue);
}
.cap-dot.on-docs {
  background: var(--build-green);
}
.cap-dot.on-code {
  background: var(--build-orange);
}
.cap-expand:hover .cap-dot:not(.off) {
  transform: scale(1.25);
}
.cap-chevron {
  width: 11px;
  height: 11px;
  flex: none;
  color: var(--fog-dim);
  transition:
    transform 0.22s cubic-bezier(0.22, 1, 0.36, 1),
    color 0.22s;
}
.cap-expand[open] .cap-chevron {
  transform: rotate(180deg);
  color: var(--c, var(--violet));
}
.cap-expand-panel {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 4px 11px 12px;
}