:root {
  --bg: #060807;
  --bg-2: #0c110d;
  --panel: #111814;
  --panel-2: #171f19;
  --line: rgba(198, 255, 61, 0.16);
  --lime: #c6ff3d;
  --lime-dim: #8fbf2a;
  --mist: #9bb8a8;
  --text: #e9f3e4;
  --muted: #8a9a8c;
  --danger: #ff6b4a;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
  --radius: 18px;
  --nav-h: 76px;
  --font-display: "Syne", system-ui, sans-serif;
  --font-body: "Figtree", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
}

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

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(198, 255, 61, 0.08), transparent 55%),
    radial-gradient(900px 500px at -10% 20%, rgba(40, 90, 70, 0.35), transparent 50%),
    var(--bg);
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.65;
  letter-spacing: 0.01em;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 80;
  opacity: 0.09;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.wrap {
  width: min(1180px, calc(100vw - 2.4rem));
  margin-inline: auto;
}

.skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  background: var(--lime);
  color: #111;
  padding: 0.6rem 1rem;
  z-index: 100;
}

.skip:focus {
  top: 1rem;
}

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 40;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  backdrop-filter: blur(16px);
  background: rgba(6, 8, 7, 0.72);
  border-bottom: 1px solid rgba(198, 255, 61, 0.1);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: min(1180px, calc(100vw - 2.4rem));
  margin-inline: auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  object-fit: cover;
  box-shadow: 0 0 0 1px rgba(198, 255, 61, 0.35), 0 0 24px rgba(198, 255, 61, 0.18);
}

.wordmark {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.04em;
  font-size: 1.05rem;
  line-height: 1;
}

.wordmark .tt {
  color: var(--lime);
  text-shadow: 0 0 18px rgba(198, 255, 61, 0.55);
}

.wordmark small {
  display: block;
  margin-top: 0.22rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.4rem;
}

.nav-links a {
  font-size: 0.92rem;
  color: var(--mist);
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--lime);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  background: transparent;
  border-radius: 10px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--text);
}

/* Hero */
.hero {
  position: relative;
  min-height: calc(100vh - var(--nav-h));
  display: grid;
  align-items: end;
  overflow: hidden;
}

.hero-media {
  position: absolute;
  inset: 0;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 55% 45%;
  filter: saturate(1.05) contrast(1.05);
}

.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(6, 8, 7, 0.15) 0%, rgba(6, 8, 7, 0.2) 40%, rgba(6, 8, 7, 0.92) 100%),
    radial-gradient(80% 70% at 70% 40%, transparent 20%, rgba(6, 8, 7, 0.45) 100%);
}

.hero-copy {
  position: relative;
  z-index: 1;
  padding: 4.5rem 0 3.5rem;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--lime);
}

.kicker::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--lime);
  box-shadow: 0 0 12px var(--lime);
}

.hero h1 {
  margin: 0.8rem 0 0.6rem;
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 8vw, 6.4rem);
  line-height: 0.9;
  letter-spacing: -0.06em;
  font-weight: 800;
}

.hero h1 .lime {
  color: var(--lime);
  text-shadow: 0 0 40px rgba(198, 255, 61, 0.35);
}

.lede {
  max-width: 42rem;
  color: var(--mist);
  font-size: 1.12rem;
}

.hero .lede strong {
  color: var(--lime);
  font-weight: 650;
}

/* Home — three stacked CTAs */
.home-gate {
  min-height: calc(100vh - var(--nav-h) - 90px);
  display: grid;
  align-items: start;
  padding: 2.4rem 0 3.2rem;
}

.home-gate-inner {
  display: grid;
  gap: 1.25rem;
  width: min(46rem, calc(100vw - 2.4rem));
}

.home-cta {
  display: grid;
  gap: 1.05rem;
  justify-items: stretch;
  padding: 1.45rem 1.5rem 1.55rem;
}

.home-cta-copy {
  display: grid;
  gap: 0.75rem;
}

.home-cta-copy p {
  margin: 0;
  color: var(--mist);
  font-size: 1.02rem;
}

.home-cta .btn {
  width: 100%;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.4rem;
  margin: 1.4rem 0 1.8rem;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 48px;
  padding: 0.7rem 1.2rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 650;
  letter-spacing: 0.01em;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-lime {
  background: var(--lime);
  color: #11170c;
  box-shadow: 0 0 30px rgba(198, 255, 61, 0.22);
}

.btn-ghost {
  border-color: var(--line);
  background: rgba(8, 12, 9, 0.4);
  color: var(--text);
}

/* Sections */
section {
  padding: 5.2rem 0;
}

.section-head {
  display: grid;
  gap: 0.7rem;
  margin-bottom: 2.2rem;
}

.section-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.4vw, 2.8rem);
  letter-spacing: -0.04em;
  line-height: 1.05;
}

.section-head p {
  margin: 0;
  max-width: 40rem;
  color: var(--muted);
}

.panel {
  background: linear-gradient(180deg, rgba(23, 31, 25, 0.88), rgba(12, 17, 13, 0.88));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* Path / learning */
.path-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 1.2rem;
}

.path-list {
  display: grid;
  gap: 0.8rem;
}

.path-item {
  padding: 1.1rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(17, 24, 20, 0.7);
  min-width: 0;
  overflow-wrap: break-word;
}

.path-item > strong {
  display: block;
  font-family: var(--font-display);
  letter-spacing: -0.03em;
}

.path-item span {
  color: var(--muted);
  font-size: 0.92rem;
}

.status {
  display: inline-block;
  margin-bottom: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lime);
}

.status.later {
  color: var(--mist);
}

.desk-card {
  overflow: hidden;
}

.desk-card img {
  width: 100%;
  height: 100%;
  min-height: 360px;
  object-fit: cover;
}

.desk-card figcaption {
  padding: 1rem 1.1rem 1.15rem;
  color: var(--muted);
  font-size: 0.9rem;
}

/* Studies */
.studies {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 1rem;
}

.study {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  min-height: 280px;
}

.study img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 280px;
  transition: transform 0.6s ease;
}

.study:hover img {
  transform: scale(1.04);
}

.study-copy {
  position: absolute;
  inset: auto 0 0;
  padding: 1.2rem 1.15rem 1.15rem;
  background: linear-gradient(180deg, transparent, rgba(6, 8, 7, 0.92));
}

.study-copy h3 {
  margin: 0 0 0.2rem;
  font-family: var(--font-display);
  letter-spacing: -0.03em;
}

.study-copy p {
  margin: 0;
  color: var(--mist);
  font-size: 0.92rem;
}

.study.tall {
  grid-row: span 2;
  min-height: 580px;
}

.study.tall img {
  min-height: 580px;
}

.study.wide {
  grid-column: 1 / -1;
}

/* About band */
.about-band {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 1.4rem;
  align-items: stretch;
}

.about-band img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 420px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.facts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
  margin-top: 1.4rem;
}

.fact {
  padding: 0.9rem 1rem;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(6, 8, 7, 0.35);
}

.fact dt {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.fact dd {
  margin: 0.2rem 0 0;
}

/* Contact */
.contact-links {
  display: grid;
  gap: 0.7rem;
  max-width: 42rem;
}

.contact-links a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.1rem;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(17, 24, 20, 0.65);
}

.contact-links a:hover {
  border-color: rgba(198, 255, 61, 0.45);
  color: var(--lime);
}

/* Journal */
.journal-list {
  display: grid;
  gap: 1rem;
}

.entry {
  padding: 1.4rem 1.5rem;
}

.entry time {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--lime);
}

.entry h2 {
  margin: 0.35rem 0 0.6rem;
  font-family: var(--font-display);
  letter-spacing: -0.03em;
}

.entry p {
  margin: 0;
  color: var(--mist);
}

.page-hero {
  padding: 3.5rem 0 1rem;
}

/* Practical recommendation — top of Home / Games */
#recommendation {
  scroll-margin-top: var(--nav-h);
}

.rec-strip {
  padding: 1.35rem 0 1.5rem;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(17, 24, 20, 0.92), rgba(12, 17, 13, 0.55));
}

.rec-head {
  display: grid;
  gap: 0.3rem;
  margin-bottom: 0.95rem;
}

.rec-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2.2vw, 1.55rem);
  letter-spacing: -0.04em;
  line-height: 1.15;
}

.rec-lede {
  max-width: 54rem;
  margin: 0.2rem 0 0;
  font-size: 1.02rem;
}

.rec-head-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 0.9rem 1.4rem;
}

.rec-head-copy {
  display: grid;
  gap: 0.3rem;
  flex: 1 1 28rem;
  min-width: 0;
}

.rec-head-cta .btn {
  flex: 0 0 auto;
}

.rec-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0.8rem;
}

.rec-grid .path-item {
  margin: 0;
  min-width: 0;
}

.rec-grid .path-item span {
  display: block;
  overflow-wrap: break-word;
}

.rec-grid .path-item a {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

.rec-example {
  margin-top: 1rem;
}

#mcp-hours,
#supergrok {
  scroll-margin-top: var(--nav-h);
}

.mcp-hero {
  background: #050706;
  border-bottom: 1px solid var(--line);
}

.mcp-hero-player {
  width: 100%;
  background: #000;
}

.mcp-hero-player .yt-frame {
  width: 100%;
  max-height: min(78vh, 920px);
  margin-inline: auto;
  aspect-ratio: 16 / 9;
}

.mcp-hero .wrap {
  padding-top: 1.35rem;
  padding-bottom: 1.6rem;
}

.mcp-explain {
  margin-top: 0.15rem;
  display: grid;
  gap: 0.85rem;
}

.mcp-explain > p {
  margin: 0;
  color: var(--mist);
  max-width: 54rem;
}

.mcp-explain h3 {
  margin: 0.35rem 0 0;
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: -0.03em;
}

.mcp-explain .rec-grid {
  margin-top: 0.15rem;
  grid-template-columns: 1fr 1fr;
}

.yt-frame {
  position: relative;
  overflow: hidden;
  background: #050706;
  aspect-ratio: 16 / 9;
}

.yt-frame iframe,
.yt-frame video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

.yt-frame video {
  object-fit: cover;
  background: #050706;
}

.grok-flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 0.55rem;
  align-items: stretch;
  margin: 0.2rem 0 0.35rem;
}

.grok-flow .path-item {
  margin: 0;
  min-width: 0;
}

.grok-flow-arrow {
  margin: 0;
  align-self: center;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--lime);
  white-space: nowrap;
}

.grok-steps {
  grid-template-columns: 1fr 1fr;
}

.grok-steps .path-item span + .term,
.grok-steps .path-item .term + span {
  margin-top: 0.65rem;
}

.term {
  margin: 0.65rem 0 0;
  padding: 0.85rem 1rem;
  overflow: auto;
  max-width: 100%;
  background: #0a0c10;
  border: 1px solid var(--line);
  border-radius: 12px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--text);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.term .prompt {
  color: var(--lime);
  margin-right: 0.35rem;
}

.grok-prompts {
  margin-top: 0.15rem;
}

.grok-shots {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
  margin-top: 0.35rem;
}

.grok-shots figure {
  margin: 0;
  overflow: hidden;
}

.grok-shots img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  object-position: top left;
  background: #050706;
}

.grok-shots figcaption {
  padding: 0.85rem 1rem 1rem;
  color: var(--mist);
  font-size: 0.9rem;
}

.grok-shots figcaption code,
.grok-credit code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  color: var(--lime);
}

.grok-credit {
  max-width: 54rem;
}

.grok-credit a.ext,
.mcp-explain a.ext {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

/* Games / video */
.clip-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
}

.video-stage {
  overflow: hidden;
}

.video-stage video {
  width: 100%;
  display: block;
  background: #050706;
  aspect-ratio: 16 / 9;
  object-fit: contain;
}

.video-caption {
  padding: 1.1rem 1.2rem 1.25rem;
}

.video-caption h2,
.video-caption h3 {
  margin: 0 0 0.3rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: -0.03em;
}

.video-caption p {
  margin: 0;
  color: var(--mist);
  font-size: 0.95rem;
}

.clip-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 1.1rem;
  margin-top: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.feature-play {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 1.4rem;
  align-items: stretch;
}

.page-hero h1 {
  margin: 0.5rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 4.2rem);
  letter-spacing: -0.05em;
  line-height: 0.95;
}

.download-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.download-card {
  padding: 1.3rem 1.35rem 1.4rem;
  display: flex;
  flex-direction: column;
}

.download-card strong {
  display: block;
  font-family: var(--font-display);
  letter-spacing: -0.03em;
  font-size: 1.2rem;
}

.download-card p {
  margin: 0.45rem 0 0;
  color: var(--mist);
  font-size: 0.95rem;
  flex: 1;
}

.download-card code,
p code,
.path-item code,
.mcp-explain code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  color: var(--lime);
  overflow-wrap: anywhere;
}

.play-steps {
  margin: 0.85rem 0 0;
  padding-left: 1.15rem;
  color: var(--mist);
  font-size: 0.92rem;
}

.play-steps li + li {
  margin-top: 0.28rem;
}

/* Games — PCG / world-building guide */
#pcg,
#bplearn,
#topdown,
#first-game,
#ue58,
#blueprints,
#packaged {
  scroll-margin-top: var(--nav-h);
}

.learn-guide h3 {
  margin: 2.4rem 0 0.7rem;
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.4vw, 1.7rem);
  letter-spacing: -0.04em;
  line-height: 1.15;
}

.learn-guide h4 {
  margin: 1.5rem 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.08rem;
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.learn-guide > .wrap > p,
.learn-copy p {
  margin: 0;
  max-width: 46rem;
  color: var(--mist);
}

.learn-guide > .wrap > p + p,
.learn-copy p + p {
  margin-top: 0.75rem;
}

.learn-guide a.ext {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

.learn-guide code,
.guide-steps code,
.guide-note code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  color: var(--lime);
}

.guide-steps {
  margin: 1rem 0 0;
  padding-left: 1.25rem;
  color: var(--mist);
  max-width: 46rem;
}

.guide-steps > li + li {
  margin-top: 0.9rem;
}

.guide-steps > li > strong:first-child {
  color: var(--text);
}

.guide-steps ol,
.guide-steps ul {
  margin: 0.5rem 0 0;
  padding-left: 1.15rem;
}

.guide-steps li li {
  margin-top: 0.32rem;
}

.guide-note {
  margin: 1.15rem 0 0;
  padding: 0.95rem 1.1rem;
  max-width: 46rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(17, 24, 20, 0.7);
  color: var(--mist);
  font-size: 0.95rem;
}

.guide-note strong.label {
  display: block;
  margin-bottom: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lime);
}

.stack-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
  margin: 1.4rem 0 0;
}

.stack-grid .path-item:last-child {
  grid-column: 1 / -1;
}

/* Footer */
.footer {
  border-top: 1px solid var(--line);
  padding: 1.6rem 0 2.2rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

/* 404 */
.not-found {
  min-height: calc(100vh - var(--nav-h) - 90px);
  display: grid;
  place-content: center;
  text-align: center;
  padding: 3rem 1rem;
}

.not-found h1 {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 6rem);
  margin: 0;
  letter-spacing: -0.06em;
  color: var(--lime);
}

/* Open nav */
body.nav-open .nav-links {
  display: flex;
}

@media (max-width: 900px) {
  .path-grid,
  .studies,
  .about-band,
  .feature-play,
  .download-grid,
  .clip-grid,
  .engine-systems,
  .engine-split,
  .stack-grid,
  .rec-grid,
  .mcp-explain .rec-grid,
  .grok-flow,
  .grok-shots {
    grid-template-columns: 1fr;
  }

  .grok-flow-arrow {
    justify-self: center;
  }

  .rec-head-cta {
    display: grid;
    grid-template-columns: 1fr;
  }

  .rec-head-cta .btn {
    width: 100%;
  }

  .rec-head-copy,
  .rec-lede,
  .rec-head h2,
  .mcp-explain > p,
  .mcp-explain {
    max-width: 100%;
    overflow-wrap: anywhere;
  }

  .stack-grid .path-item:last-child {
    grid-column: auto;
  }

  .study.tall,
  .study.tall img {
    min-height: 320px;
    grid-row: auto;
  }

  .nav-toggle {
    display: inline-block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 0.6rem 1.2rem 1rem;
    background: rgba(6, 8, 7, 0.96);
    border-bottom: 1px solid var(--line);
  }

  .nav-links a {
    width: 100%;
    padding: 0.75rem 0;
    border-bottom: 1px solid rgba(198, 255, 61, 0.08);
  }

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

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

  .study img,
  .btn {
    transition: none;
  }
}

/* Rust / oTTeCAD */
body.rust {
  background: #08090d;
}

body.rust .grain {
  display: none;
}

.engine-guide {
  padding: 2.6rem 0 3.2rem;
  border-bottom: 1px solid var(--line);
  background: #08090d;
}

.engine-preview {
  width: 100%;
  margin: 1.6rem 0 2rem;
  border: 0;
  border-block: 1px solid var(--line);
  border-radius: 0;
  overflow: hidden;
  background: #0c0e14;
}

.engine-preview img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  object-position: center top;
}

.engine-preview figcaption {
  width: min(1180px, calc(100vw - 2.4rem));
  margin: 0 auto;
  padding: 0.85rem 0 1rem;
  color: var(--mist);
  font-size: 0.92rem;
}

.engine-preview figcaption a {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

#engine,
#write,
#editor {
  scroll-margin-top: var(--nav-h);
}

.engine-guide .section-head h1 {
  margin: 0;
  max-width: 22ch;
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 4.6vw, 3.35rem);
  letter-spacing: -0.05em;
  line-height: 0.98;
}

.engine-guide .lede {
  max-width: 44rem;
}

.engine-guide a.ext {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

.engine-guide h2 {
  margin: 2.4rem 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.6vw, 1.9rem);
  letter-spacing: -0.04em;
  line-height: 1.1;
}

.engine-guide > .wrap > p,
.engine-copy p {
  margin: 0;
  max-width: 46rem;
  color: var(--mist);
}

.engine-guide > .wrap > p + p,
.engine-copy p + p {
  margin-top: 0.75rem;
}

.engine-systems {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
  margin: 1.5rem 0 0;
}

.engine-split {
  display: grid;
  grid-template-columns: minmax(16rem, 1fr) minmax(22rem, 1.15fr);
  gap: 1.2rem 1.6rem;
  align-items: start;
  margin: 0;
}

.engine-guide .code-example {
  margin-top: 0.35rem;
}

.engine-guide .code-example pre {
  max-height: min(32rem, 70vh);
}

.engine-tree {
  margin: 0.9rem 0 0;
  padding: 0.95rem 1.05rem;
  overflow: auto;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.55;
  color: var(--text);
}

.engine-tree .cm {
  color: var(--muted);
}

.engine-steps {
  margin: 0.9rem 0 0;
  padding-left: 1.2rem;
  color: var(--mist);
  max-width: 46rem;
}

.engine-steps li + li {
  margin-top: 0.55rem;
}

.engine-steps code,
.engine-guide p code,
.engine-guide .path-item code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  color: var(--lime);
}

.editor-intro {
  flex-shrink: 0;
  padding: 0.85rem 1.4rem 0.95rem;
  border-bottom: 1px solid var(--line);
  background: #08090d;
}

.editor-copy {
  min-width: 0;
}

.code-example {
  margin: 0;
  min-width: 0;
}

.code-example figcaption {
  margin: 0 0 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--lime-dim);
}

.code-example pre {
  margin: 0;
  padding: 0.85rem 1rem;
  overflow: auto;
  max-height: min(22rem, 38vh);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.55;
  color: var(--text);
}

.code-example code {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

.code-example .kw {
  color: var(--lime);
}

.code-example .cm {
  color: var(--muted);
}

@media (min-width: 901px) {
  .editor-intro {
    display: grid;
    grid-template-columns: minmax(16rem, 1fr) minmax(22rem, 1.1fr);
    gap: 0.85rem 1.6rem;
    align-items: start;
  }
}

.editor-intro .kicker {
  margin: 0 0 0.35rem;
}

.editor-intro h1 {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.2vw, 1.55rem);
  letter-spacing: -0.04em;
  line-height: 1.15;
}

.editor-intro p {
  margin: 0;
  max-width: 54rem;
  color: var(--mist);
  font-size: 0.92rem;
}

.editor-intro p + p {
  margin-top: 0.65rem;
}

.editor-shell {
  padding: 0;
  min-height: calc(100vh - var(--nav-h));
  display: flex;
  flex-direction: column;
}

.editor-stage {
  position: relative;
  flex: 1;
  min-height: 70vh;
  height: 78vh;
  background: #0c0e14;
  border-top: 1px solid var(--line);
}

.editor-stage canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  outline: none;
}

.editor-loading {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: grid;
  place-content: center;
  text-align: center;
  padding: 2rem;
  background: #0c0e14;
  pointer-events: none;
}

.editor-loading h1,
.editor-fail h2 {
  margin: 0.45rem 0 0.5rem;
  font-family: var(--font-display);
  letter-spacing: -0.05em;
  font-size: clamp(1.6rem, 4vw, 2.6rem);
}

.editor-loading p,
.editor-fail p {
  margin: 0;
  color: var(--mist);
  max-width: 28rem;
}

.editor-fail {
  max-width: 28rem;
  margin-inline: auto;
}

.editor-mobile {
  display: none;
  margin: 0;
  padding: 0.7rem 1.2rem;
  font-size: 0.88rem;
  color: var(--mist);
  background: rgba(198, 255, 61, 0.08);
  border-bottom: 1px solid var(--line);
}

@media (max-width: 900px) {
  .code-example {
    margin-top: 0.85rem;
  }

  .code-example pre {
    max-height: 16rem;
  }
}

@media (max-width: 700px) {
  .editor-mobile {
    display: block;
  }

  .editor-intro {
    padding: 0.7rem 1.2rem 0.8rem;
  }

  .editor-stage {
    height: 70vh;
    min-height: 22rem;
  }
}