/* ─── Tokens ─────────────────────────────────────────────── */
:root {
  --bg: #0b1017;
  --bg-subtle: #111923;
  --bg-chip: #15212d;
  --text: #edf3f4;
  --text-2: #aebbc2;
  --text-dim: #8999a3;
  --border: #24313c;
  --border-dim: #19242e;
  --accent: oklch(79% 0.13 190);
  --accent-dim: oklch(49% 0.08 190);
  --accent-2: oklch(72% 0.13 310);
  --accent-warn: oklch(72% 0.16 55);  /* warm amber ~#ef852e — ~6.5:1 vs --bg, ~5.6:1 vs --bg-chip (WCAG AA) */
  --shadow-card: 0 1px 0 rgba(255, 255, 255, 0.035) inset, 0 18px 50px rgba(0, 0, 0, 0.16);

  --mono: 'Geist Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  --sans: 'Geist', -apple-system, BlinkMacSystemFont, 'Inter', system-ui, sans-serif;
  --measure: 64rem;
  --measure-narrow: 52rem;
  --measure-prose: 42rem;
}

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

::selection { background: var(--accent); color: var(--bg); }

:where(a, button, input, textarea, select):focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

html { scroll-behavior: smooth; color-scheme: dark; }

html, body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body { min-height: 100dvh; display: flex; flex-direction: column; }

.container {
  width: 100%;
  max-width: var(--measure);
  margin: 0 auto;
  padding: clamp(3rem, 6vw, 5.5rem) clamp(1.75rem, 5vw, 3rem);
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: clamp(3.5rem, 6vw, 5.5rem);
}

.container--narrow { max-width: 56rem; }

/* ─── Brand + nav ────────────────────────────────────────── */
.brand { display: flex; align-items: center; gap: 0.7rem; font-family: var(--mono); position: relative; z-index: 2; }
.brand__cursor { color: var(--accent); font-weight: 600; font-size: 1.15rem; line-height: 1; position: relative; top: -0.02em; animation: blink 1.1s steps(1) infinite; }
.brand__mark { width: 1.45rem; height: 1.45rem; display: grid; grid-template-columns: repeat(3, 1fr); gap: 3px; transform: skewY(-12deg); }
.brand__mark i { display: block; background: var(--accent); border-radius: 1px; }
.brand__mark i:nth-child(1) { height: 50%; align-self: end; opacity: 0.55; }
.brand__mark i:nth-child(2) { height: 75%; align-self: end; opacity: 0.75; }
.brand__mark i:nth-child(3) { height: 100%; align-self: end; }
.brand__word { color: var(--text); font-weight: 600; font-size: 1rem; letter-spacing: -0.01em; }
.brand__word a { border: none; color: inherit; }
.brand__word a:hover { color: var(--accent); }
.brand__labs { color: var(--accent); font-weight: 500; margin-left: 0.38rem; }
.brand__dot { color: var(--text-dim); font-size: 0.78rem; font-weight: 500; letter-spacing: 0.18em; text-transform: uppercase; margin-left: auto; }

.site-nav {
  display: flex;
  gap: 1.5rem;
  margin-left: auto;
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.site-nav a {
  color: var(--text-dim);
  border: none;
  padding-bottom: 0.15rem;
  border-bottom: 1px solid transparent;
}
.site-nav a:hover, .site-nav a:focus-visible { color: var(--accent); border-bottom-color: var(--accent); }
.site-nav a[aria-current="page"] { color: var(--text); }
.site-nav .nav-cta { color: var(--text); border: 1px solid var(--border); border-radius: 999px; padding: 0.45rem 0.75rem; margin-top: -0.4rem; }
.site-nav .nav-cta:hover, .site-nav .nav-cta:focus-visible { background: var(--accent); color: var(--bg); border-color: var(--accent); }

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

/* ─── Hero ───────────────────────────────────────────────── */
.hero { display: flex; flex-direction: column; gap: 1.5rem; max-width: var(--measure-narrow); }
.hero__eyebrow {
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
}
.hero__line {
  font-family: var(--sans);
  font-size: clamp(2.05rem, 4.2vw, 2.85rem);
  font-weight: 500;
  line-height: 1.18;
  letter-spacing: -0.024em;
  color: var(--text);
  max-width: 28ch;
}
.hero__line em { font-style: normal; color: var(--accent); }
.hero__sub {
  font-family: var(--sans);
  font-size: 1.0625rem;
  color: var(--text-2);
  line-height: 1.7;
  max-width: 58ch;
}

/* ─── Section skeleton ───────────────────────────────────── */
section { display: flex; flex-direction: column; gap: 2.25rem; padding-top: 2.5rem; border-top: 1px solid var(--border); }
.section__head { display: flex; align-items: baseline; gap: 1rem; }
.section__label {
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-dim);
  white-space: nowrap;
}
.section__rule { flex: 1; height: 1px; background: var(--border-dim); }
.section__more {
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-dim);
  border: none;
  padding-bottom: 0.15rem;
  border-bottom: 1px solid transparent;
  white-space: nowrap;
}
.section__more:hover, .section__more:focus-visible { color: var(--accent); border-bottom-color: var(--accent); }

/* ─── Work entries ───────────────────────────────────────── */
.work { display: flex; flex-direction: column; gap: 3.5rem; }
.work__item { display: grid; gap: 1.5rem; }
.work__head { display: flex; flex-direction: column; gap: 0.5rem; }
.work__name {
  font-family: var(--sans);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.018em;
  line-height: 1.25;
}
.work__name a { border: none; color: inherit; }
.work__name a:hover { color: var(--accent); }
.work__tag { font-family: var(--mono); font-size: 0.85rem; color: var(--text-dim); letter-spacing: 0.01em; }
.work__desc { font-family: var(--sans); font-size: 1.0625rem; line-height: 1.7; color: var(--text-2); max-width: 64ch; }
.work__more {
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  border: none;
  padding-bottom: 0.15rem;
  border-bottom: 1px solid transparent;
  align-self: start;
}
.work__more::after { content: " →"; color: var(--accent); }
.work__more:hover, .work__more:focus-visible { color: var(--accent); border-bottom-color: var(--accent); }

/* Callout: measurable outcome */
.outcome {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  padding: 1rem 1.25rem;
  background: color-mix(in srgb, var(--accent) 8%, var(--bg-subtle));
  border: 1px solid color-mix(in srgb, var(--accent) 25%, var(--border));
  border-radius: 6px;
  font-family: var(--mono);
  font-size: 0.9375rem;
  color: var(--text);
  line-height: 1.6;
}
.outcome__label {
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.75rem;
  padding-top: 0.2rem;
  white-space: nowrap;
}

/* Revenue experiment offer surfaces */
.offer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); gap: 1rem; }
.offer-card { display: flex; flex-direction: column; gap: 0.75rem; padding: 1.25rem; background: var(--bg-subtle); border: 1px solid var(--border); border-radius: 8px; }
.offer-card h2 { font-size: 1.15rem; line-height: 1.3; }
.offer-card p, .offer-copy { color: var(--text-2); }
.offer-card a { align-self: start; }
.offer-status { padding: 1rem 1.25rem; border: 1px solid var(--accent-warn); border-radius: 8px; color: var(--text-2); }
.offer-status strong { color: var(--accent-warn); }
.offer-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 0.8rem; }
.offer-button { appearance: none; border: 1px solid var(--accent); border-radius: 5px; background: transparent; color: var(--accent); cursor: pointer; font: 500 0.85rem/1 var(--mono); padding: 0.85rem 1rem; }
.offer-button:hover, .offer-button:focus-visible { background: var(--accent); color: var(--bg); }
.offer-button[disabled] { cursor: default; border-color: var(--text-dim); color: var(--text-dim); background: transparent; }
.offer-table-wrap { overflow-x: auto; }
.offer-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.offer-table th, .offer-table td { padding: 0.75rem; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
.offer-table th { color: var(--text-dim); font: 500 0.75rem/1.4 var(--mono); text-transform: uppercase; letter-spacing: 0.08em; }
.offer-input { width: 100%; max-width: 30rem; padding: 0.75rem; border: 1px solid var(--border); border-radius: 5px; background: var(--bg-subtle); color: var(--text); font: inherit; }
.sample-report { display: grid; gap: 1rem; }
.sample-finding { padding: 1rem; border-left: 3px solid var(--accent-warn); background: var(--bg-subtle); }
.sample-finding code { color: var(--accent); }
.offer-note { color: var(--text-dim); font-size: 0.85rem; }

@media (max-width: 720px) {
  .offer-table { min-width: 42rem; }
}

/* Diagram box */
.diagram {
  font-family: var(--mono);
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--text-2);
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  box-shadow: var(--shadow-card);
}
.diagram pre { margin: 0; white-space: pre; font-family: inherit; }
.diagram .accent { color: var(--accent); }
.diagram .dim { color: var(--text-dim); }

/* Patterns list */
.patterns {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.65rem;
  font-family: var(--mono);
  font-size: 0.875rem;
  color: var(--text-2);
  line-height: 1.6;
}
@media (min-width: 720px) { .patterns { grid-template-columns: 1fr 1fr; gap: 0.55rem 2rem; } }
.patterns li { display: flex; gap: 0.6rem; align-items: baseline; }
.patterns li::before { content: "→"; color: var(--accent); flex-shrink: 0; font-weight: 500; }

/* Stack chips */
.stack { display: flex; flex-wrap: wrap; gap: 0.5rem; padding-top: 0.5rem; }
.stack span {
  font-family: var(--mono);
  font-size: 0.78rem;
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-dim);
  background: var(--bg-chip);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

/* Metadata row */
.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--border-dim);
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.meta__item { display: flex; align-items: baseline; gap: 0.5rem; }
.meta__item strong { color: var(--text-2); font-weight: 500; }

/* ─── Article (essays + case studies) ────────────────────── */
.article { display: flex; flex-direction: column; gap: 1.75rem; max-width: var(--measure-prose); }
.article--wide { max-width: var(--measure-narrow); }
.article__eyebrow {
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
}
.article__title {
  font-family: var(--sans);
  font-size: clamp(2rem, 4.5vw, 2.85rem);
  font-weight: 500;
  line-height: 1.18;
  letter-spacing: -0.024em;
  color: var(--text);
  max-width: 24ch;
}
.article__dek {
  font-family: var(--sans);
  font-size: 1.125rem;
  color: var(--text-2);
  line-height: 1.65;
  max-width: 58ch;
}
.article__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--border-dim);
}
.article__meta strong { color: var(--text-2); font-weight: 500; }

.prose { display: flex; flex-direction: column; gap: 1.5rem; max-width: 68ch; font-family: var(--sans); font-size: 1.0625rem; line-height: 1.75; color: var(--text-2); }
.prose p { max-width: 68ch; }
.prose p strong { color: var(--text); font-weight: 500; }
.prose em { font-style: italic; color: var(--text); }
.prose h2 {
  font-family: var(--mono);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text);
  margin-top: 1.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-dim);
}
.prose h3 { font-family: var(--sans); font-size: 1.25rem; font-weight: 600; color: var(--text); margin-top: 1rem; letter-spacing: -0.012em; }
.prose ul:not(.patterns):not(.engagements) {
  list-style: none;
  padding-left: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.prose ul:not(.patterns):not(.engagements) li {
  position: relative;
  padding-left: 1.25rem;
  line-height: 1.6;
}
.prose ul:not(.patterns):not(.engagements) li::before {
  content: "→";
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.875rem;
  position: absolute;
  left: 0;
  top: 0;
}
/* V2 primitives: opt out of generic .prose ul styling — they style their own lists.
   Specificity bumped to (0,3,3+) to beat .prose ul:not()() li::before at (0,3,2). */
.prose .tldr.tldr ul li,
.prose .callout.callout ul li {
  position: static;
  padding-left: 1.25em;
  text-indent: -1.25em;
  line-height: 1.6;
}
.prose .tldr.tldr ul li::before {
  content: "→ ";
  color: var(--accent);
  position: static;
  font-family: inherit;
  font-size: inherit;
}
.prose .callout.callout--warn ul li::before {
  content: "→ ";
  color: var(--accent-warn);
  position: static;
  font-family: inherit;
  font-size: inherit;
}
.prose .callout.callout--note ul li::before {
  content: "→ ";
  color: var(--accent);
  position: static;
  font-family: inherit;
  font-size: inherit;
}
.prose blockquote {
  font-family: var(--sans);
  font-style: italic;
  color: var(--text);
  padding-left: 1rem;
  border-left: 2px solid var(--accent);
  max-width: 60ch;
}
.prose code {
  font-family: var(--mono);
  font-size: 0.875em;
  overflow-wrap: anywhere;
  background: var(--bg-chip);
  padding: 0.05em 0.35em;
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--text);
}

/* ─── Methodology ────────────────────────────────────────── */
.method { display: grid; grid-template-columns: 1fr; gap: 2rem; }
@media (min-width: 640px) { .method { grid-template-columns: 1fr 1fr; gap: 2.5rem; } }
.method__item { display: flex; flex-direction: column; gap: 0.55rem; }
.method__title {
  font-family: var(--mono);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.01em;
}
.method__title::before { content: "→ "; color: var(--accent); }
.method__body {
  font-family: var(--sans);
  font-size: 1rem;
  color: var(--text-2);
  line-height: 1.65;
  max-width: 50ch;
  padding-left: 1.25rem;
}

/* ─── Engagement tiers ───────────────────────────────────── */
.tiers { display: grid; grid-template-columns: 1fr; gap: 1.25rem; }
@media (min-width: 720px) { .tiers { grid-template-columns: repeat(3, 1fr); gap: 1.25rem; } }
.tier {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1.75rem 1.5rem;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow-card);
}
.tier__name {
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}
.tier__shape {
  font-family: var(--sans);
  font-size: 1.25rem;
  font-weight: 500;
  line-height: 1.35;
  letter-spacing: -0.012em;
  color: var(--text);
}
.tier__duration {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.tier__duration .tier__price {
  color: var(--accent);
  letter-spacing: 0.08em;
}
.tier__cta {
  margin-top: auto;
  padding-top: 0.75rem;
}
.tier__body {
  font-family: var(--sans);
  font-size: 0.9375rem;
  color: var(--text-2);
  line-height: 1.7;
}
.tier__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--text-2);
  line-height: 1.55;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--border-dim);
}
.tier__list li { display: flex; gap: 0.5rem; align-items: baseline; }
.tier__list li::before { content: "▹"; color: var(--accent); flex-shrink: 0; }

/* ─── Available for (legacy / footnote use) ──────────────── */
.engagements { display: grid; grid-template-columns: 1fr; gap: 0.85rem; font-family: var(--mono); font-size: 0.95rem; color: var(--text-2); }
@media (min-width: 640px) { .engagements { grid-template-columns: 1fr 1fr; gap: 0.75rem 2rem; } }
.engagements div { display: flex; gap: 0.6rem; align-items: baseline; line-height: 1.6; }
.engagements div::before { content: "▹"; color: var(--accent); flex-shrink: 0; }

/* ─── Writing index list ─────────────────────────────────── */
.writing-list { display: flex; flex-direction: column; gap: 2.25rem; }
.writing-list__item { display: flex; flex-direction: column; gap: 0.65rem; padding-bottom: 2rem; border-bottom: 1px solid var(--border-dim); }
.writing-list__item:last-child { border-bottom: none; padding-bottom: 0; }
.writing-list__date {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.writing-list__title {
  font-family: var(--sans);
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: -0.018em;
  line-height: 1.28;
  color: var(--text);
}
.writing-list__title a { border: none; color: inherit; }
.writing-list__title a:hover { color: var(--accent); }
.writing-list__dek {
  font-family: var(--sans);
  font-size: 1.0625rem;
  color: var(--text-2);
  line-height: 1.7;
  max-width: 64ch;
}

/* ─── Contact ────────────────────────────────────────────── */
.contact-grid {
  display: grid;
  grid-template-columns: 7rem 1fr;
  gap: 0.85rem 1.25rem;
  font-family: var(--mono);
  font-size: 0.975rem;
}
.contact-grid dt {
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  padding-top: 0.3rem;
}
.contact-grid dd { color: var(--text); }

/* ─── Back link ──────────────────────────────────────────── */
.back-link {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-dim);
  border: none;
  padding-bottom: 0.15rem;
  border-bottom: 1px solid transparent;
  align-self: start;
}
.back-link::before { content: "← "; color: var(--accent); }
.back-link:hover, .back-link:focus-visible { color: var(--accent); border-bottom-color: var(--accent); }

/* ─── Links ──────────────────────────────────────────────── */
a {
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
  transition: color 140ms ease, border-color 140ms ease;
  padding-bottom: 1px;
}
a:hover, a:focus-visible { color: var(--accent); border-bottom-color: var(--accent); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }

/* ─── Footer ─────────────────────────────────────────────── */
footer {
  padding: 2rem clamp(1.75rem, 5vw, 3rem) 3rem;
  max-width: var(--measure);
  width: 100%;
  margin: 0 auto;
  border-top: 1px solid var(--border-dim);
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ─── Buttons (CTA) ──────────────────────────────────────── */
.btn {
  font-family: var(--mono);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.85rem 1.4rem;
  border-radius: 6px;
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  white-space: normal;
  overflow-wrap: anywhere;
  text-align: center;
  text-decoration: none;
  transition: background 140ms ease, color 140ms ease, border-color 140ms ease, transform 80ms ease;
}
.btn-primary {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}
.btn-primary:hover, .btn-primary:focus-visible {
  background: color-mix(in srgb, var(--accent) 86%, white);
  border-color: color-mix(in srgb, var(--accent) 86%, white);
  color: var(--bg);
}
.btn-secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.btn-secondary:hover, .btn-secondary:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
}
.btn-link {
  font-family: var(--mono);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
  border-bottom: 1px solid transparent;
  padding-bottom: 0.15rem;
}
.btn-link:hover, .btn-link:focus-visible { color: var(--accent); border-bottom-color: var(--accent); }

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  padding-top: 0.75rem;
}

/* ─── Closing CTA aside (case studies + essays) ──────────── */
.cta-aside {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  margin-top: 2.75rem;
  padding: 2rem 2.25rem;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 8px;
  max-width: var(--measure-prose);
}
.cta-aside h3 {
  font-family: var(--sans);
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.3;
  color: var(--text);
}
.cta-aside p {
  font-family: var(--sans);
  font-size: 1rem;
  color: var(--text-2);
  line-height: 1.65;
  max-width: 60ch;
}
.cta-aside__buttons {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  padding-top: 0.25rem;
}

/* ─── About section ──────────────────────────────────────── */
.about {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  max-width: var(--measure-prose);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--text-2);
}
.about p strong { color: var(--text); font-weight: 600; }

/* ─── V2 primitives: TL;DR ───────────────────────────────── */
.tldr {
  background: var(--bg-subtle);
  border-left: 3px solid var(--accent);
  padding: 1.1rem 1.5rem;
  margin: 1.5rem 0 2rem;
  border-radius: 0 6px 6px 0;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}
.tldr__label {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0;
}
.tldr ul {
  list-style: none;
  padding: 0;
  margin: 0;
  font-family: var(--mono);
  font-size: 0.875rem;
  color: var(--text-2);
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.tldr ul li {
  padding-left: 1.25em;
  text-indent: -1.25em;
}
.tldr ul li::before {
  content: "→ ";
  color: var(--accent);
}

/* ─── V2 primitives: Callouts (warn / note) ──────────────── */
.callout {
  padding: 0.9rem 1.2rem;
  margin: 1.5rem 0;
  background: var(--bg-chip);
  border-radius: 0 4px 4px 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
/* Inside .prose (a flex column with its own 1.5rem gap), zero the
   callout margin so we don't double the rhythm into a 4.5rem gulf. */
.prose > .callout { margin: 0; }
.prose > .tldr { margin: 0; }
.prose > .step-sequence { margin: 0; }
.prose > .section-marker { margin: 0.75rem 0; }
.callout--warn { border-left: 3px solid var(--accent-warn); }
.callout--note { border-left: 3px solid var(--accent-dim); }
.callout__label {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-weight: 600;
  margin: 0;
}
.callout--warn .callout__label { color: var(--accent-warn); }
.callout--note .callout__label { color: var(--accent); }
.callout__body {
  font-family: var(--sans);
  font-size: 0.9375rem;
  color: var(--text-2);
  line-height: 1.65;
  margin: 0;
}
.callout__body p { margin: 0; max-width: none; }
.callout__body p + p { margin-top: 0.5em; }

/* ─── V2 primitives: Step sequence ───────────────────────── */
.step-sequence {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  margin: 2rem 0;
}
.step {
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: 0 1rem;
}
.step__num {
  font-family: var(--mono);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--accent);
  line-height: 1.1;
  padding-top: 0.1em;
}
.step__body {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.step__title {
  font-family: var(--sans);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
  margin: 0;
}
.step__body p { margin: 0; max-width: none; }
.step__body p + p { margin-top: 0.5em; }

/* ─── V2 primitives: Section marker ──────────────────────── */
.section-marker {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.5rem 0;
  margin: 2.5rem 0;
}
.section-marker::before,
.section-marker::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border-dim);
}
.section-marker span {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--text-dim);
  white-space: nowrap;
}

/* ─── Mobile tightening ──────────────────────────────────── */
@media (max-width: 720px) {
  html, body { font-size: 16px; }

  .container {
    padding: clamp(1.5rem, 4vw, 2.5rem) clamp(1.25rem, 4vw, 1.75rem);
    gap: 2.25rem;
  }

  /* Brand + nav: stack on narrow */
  .brand { flex-wrap: wrap; gap: 0.4rem 0.75rem; }
  .site-nav {
    flex: 1 1 100%;
    margin-left: 0;
    gap: 0.9rem;
    flex-wrap: wrap;
    font-size: 0.7rem;
    letter-spacing: 0.14em;
    padding-top: 0.25rem;
  }
  .site-nav .nav-cta {
    margin: 0;
    padding: 0 0 0.15rem;
    border: none;
    border-radius: 0;
    color: var(--accent);
  }

  /* Section rhythm */
  section { gap: 1.5rem; padding-top: 1.75rem; }
  .section__head { gap: 0.65rem; flex-wrap: wrap; }
  .section__label { font-size: 0.7rem; letter-spacing: 0.18em; }
  .section__more { font-size: 0.68rem; }

  /* Hero */
  .hero { gap: 1rem; }
  .hero__line { font-size: 1.85rem; line-height: 1.2; max-width: none; }
  .hero__sub { font-size: 1rem; }
  .hero__eyebrow { font-size: 0.7rem; }
  .hero-cta { gap: 0.6rem; padding-top: 0.5rem; }
  .hero-cta .btn { font-size: 0.78rem; padding: 0.7rem 1.05rem; flex: 1 1 auto; justify-content: center; }

  /* Project proofs */
  .work { gap: 2.25rem; }
  .work__item { gap: 1rem; }
  .work__name { font-size: 1.2rem; }
  .work__tag { font-size: 0.78rem; }
  .work__desc { font-size: 0.9375rem; line-height: 1.6; }
  .outcome { font-size: 0.85rem; padding: 0.85rem 1rem; gap: 0.65rem; }
  .outcome__label { font-size: 0.68rem; }
  .stack span { font-size: 0.7rem; padding: 0.2rem 0.55rem; }
  .meta { font-size: 0.68rem; gap: 0.85rem; }

  /* Diagram blocks: smaller mono so wide tables don't horizontal-scroll */
  .diagram { font-size: 0.7rem; padding: 0.85rem 1rem; line-height: 1.5; }

  /* Writing list */
  .writing-list { gap: 1.5rem; }
  .writing-list__item { gap: 0.5rem; padding-bottom: 1.25rem; }
  .writing-list__title { font-size: 1.1rem; }
  .writing-list__dek { font-size: 0.95rem; }

  /* How I work */
  .method { gap: 1.25rem; }
  .method__title { font-size: 0.85rem; }
  .method__body { font-size: 0.9rem; padding-left: 1rem; }

  /* About */
  .about { font-size: 0.95rem; line-height: 1.7; gap: 0.85rem; }

  /* Engagement tiers */
  .tiers { gap: 0.75rem; }
  .tier { padding: 1.25rem; gap: 0.7rem; }
  .tier__shape { font-size: 1.1rem; }
  .tier__body { font-size: 0.9rem; }
  .tier__list { font-size: 0.8rem; padding-top: 0.6rem; gap: 0.4rem; }
  .tier__cta { padding-top: 0.5rem; }

  /* Article (essay + case study heads) */
  .article { gap: 1.1rem; }
  .article__title { font-size: 1.7rem; line-height: 1.2; }
  .article__dek { font-size: 1rem; }
  .article__meta { font-size: 0.7rem; gap: 0.85rem; }

  /* Prose body */
  .prose { font-size: 0.975rem; gap: 1.1rem; }
  .prose h2 { font-size: 0.78rem; margin-top: 1rem; }
  .prose h3 { font-size: 1.05rem; margin-top: 0.6rem; }

  /* Closing CTA */
  .cta-aside { padding: 1.25rem 1.25rem; gap: 0.85rem; margin-top: 2rem; }
  .cta-aside h3 { font-size: 1.15rem; }
  .cta-aside p { font-size: 0.9375rem; }
  .cta-aside__buttons { gap: 0.75rem; flex-direction: column; align-items: stretch; }
  .cta-aside__buttons .btn { justify-content: center; }

  /* Contact */
  .contact-grid { grid-template-columns: 5.5rem 1fr; font-size: 0.92rem; gap: 0.6rem 0.85rem; }
  .contact-grid dt { font-size: 0.7rem; }

  /* Footer */
  footer { padding: 1.5rem clamp(1.25rem, 4vw, 1.75rem) 2rem; font-size: 0.7rem; gap: 0.5rem; }

  /* V2 primitives: tighter on narrow screens */
  .tldr { padding: 0.9rem 1.1rem; margin: 1rem 0 1.5rem; gap: 0.5rem; }
  .tldr__label { font-size: 0.68rem; letter-spacing: 0.18em; }
  .tldr ul { font-size: 0.82rem; gap: 0.35rem; }

  .callout { padding: 0.75rem 1rem; margin: 1.1rem 0; }
  .callout__label { font-size: 0.66rem; letter-spacing: 0.16em; }
  .callout__body { font-size: 0.88rem; line-height: 1.6; }

  .step-sequence { gap: 1.75rem; margin: 1.5rem 0; }
  .step { grid-template-columns: 2rem 1fr; gap: 0 0.75rem; }
  .step__num { font-size: 1.25rem; }
  .step__title { font-size: 1.05rem; }

  .section-marker { gap: 0.75rem; margin: 1.75rem 0; }
  .section-marker span { font-size: 0.62rem; letter-spacing: 0.16em; }
}

@media (prefers-reduced-motion: reduce) {
  a { transition: none; }
  .brand__cursor { animation: none; }
  .btn { transition: none; }
}

/* ─── Althor Labs home ───────────────────────────────────── */
.home { position: relative; overflow-x: hidden; }
.ambient-grid {
  position: absolute;
  inset: 0 0 auto;
  height: 52rem;
  pointer-events: none;
  opacity: 0.38;
  background:
    linear-gradient(to bottom, transparent 78%, var(--bg)),
    radial-gradient(circle at 78% 12%, color-mix(in srgb, var(--accent) 13%, transparent), transparent 28rem),
    linear-gradient(color-mix(in srgb, var(--border) 34%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--border) 34%, transparent) 1px, transparent 1px);
  background-size: auto, auto, 40px 40px, 40px 40px;
  mask-image: linear-gradient(to bottom, black 0%, black 65%, transparent 100%);
}
.home .container { max-width: 76rem; gap: 0; position: relative; z-index: 1; }
.home main { display: flex; flex-direction: column; }
.home .brand { padding-bottom: clamp(4rem, 8vw, 7.5rem); }

.lab-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(24rem, 0.85fr);
  align-items: center;
  gap: clamp(3rem, 7vw, 7rem);
  padding-bottom: clamp(4rem, 8vw, 7rem);
}
.lab-hero__copy { display: flex; flex-direction: column; gap: 1.5rem; }
.home .hero__eyebrow { display: flex; align-items: center; gap: 0.8rem 1.1rem; flex-wrap: wrap; }
.home .hero__eyebrow span + span { color: var(--text-dim); }
.home .hero__eyebrow span + span::before { content: "·"; margin-right: 1.1rem; color: var(--border); }
.lab-hero__title {
  font-size: clamp(3.25rem, 6.8vw, 5.85rem);
  font-weight: 500;
  line-height: 0.98;
  letter-spacing: -0.065em;
  max-width: 11ch;
}
.lab-hero__title em { color: var(--accent); font-style: normal; }
.lab-hero__sub { max-width: 42rem; color: var(--text-2); font-size: clamp(1.05rem, 1.8vw, 1.22rem); line-height: 1.7; }
.availability { display: flex; align-items: center; gap: 0.6rem; padding-top: 0.5rem; font: 500 0.74rem/1.4 var(--mono); color: var(--text-dim); letter-spacing: 0.12em; text-transform: uppercase; }
.availability__dot { width: 0.5rem; height: 0.5rem; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 5px color-mix(in srgb, var(--accent) 10%, transparent); }

.system-map { border: 1px solid var(--border); background: color-mix(in srgb, var(--bg-subtle) 82%, transparent); box-shadow: var(--shadow-card); border-radius: 12px; overflow: hidden; backdrop-filter: blur(12px); }
.system-map__top, .system-map__foot { display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding: 0.85rem 1rem; font: 500 0.68rem/1.4 var(--mono); color: var(--text-dim); letter-spacing: 0.08em; text-transform: uppercase; }
.system-map__top { border-bottom: 1px solid var(--border); }
.system-map__foot { border-top: 1px solid var(--border); }
.system-map__state { color: var(--accent); display: flex; align-items: center; gap: 0.4rem; }
.system-map__state::before { content: ""; width: 0.4rem; height: 0.4rem; border-radius: 50%; background: var(--accent); }
.system-map__flow { padding: 1.4rem; }
.system-node { display: grid; grid-template-columns: 2rem 1fr auto; align-items: center; gap: 0.75rem; padding: 0.9rem 1rem; border: 1px solid var(--border-dim); background: color-mix(in srgb, var(--bg-chip) 78%, transparent); border-radius: 6px; }
.system-node > span { color: var(--accent); font: 500 0.65rem/1 var(--mono); }
.system-node strong { font: 600 0.88rem/1.2 var(--mono); color: var(--text); }
.system-node small { color: var(--text-dim); font: 400 0.7rem/1.2 var(--mono); }
.system-node--input { border-color: color-mix(in srgb, var(--accent-2) 40%, var(--border)); }
.system-node--output { border-color: color-mix(in srgb, var(--accent) 45%, var(--border)); }
.system-line { height: 1.25rem; width: 2px; background: var(--border); margin-left: 2.35rem; position: relative; }
.system-line i { position: absolute; width: 5px; height: 5px; border-radius: 50%; background: var(--accent); left: -1.5px; top: 0.4rem; }

.signal-rail { display: flex; flex-wrap: wrap; gap: 0; border-block: 1px solid var(--border); margin-bottom: clamp(5rem, 10vw, 9rem); }
.signal-rail span { flex: 1 1 auto; padding: 0.95rem 1.1rem; color: var(--text-dim); font: 500 0.68rem/1 var(--mono); text-transform: uppercase; letter-spacing: 0.12em; text-align: center; border-right: 1px solid var(--border-dim); }
.signal-rail span:last-child { border-right: none; }

.home-section { padding: clamp(4rem, 8vw, 7rem) 0; border-top: 1px solid var(--border); gap: clamp(2rem, 5vw, 4rem); }
.section-intro { display: flex; flex-direction: column; gap: 1rem; max-width: 48rem; }
.section-intro--split { max-width: none; flex-direction: row; justify-content: space-between; align-items: flex-end; }
.section-intro h2, .about-lab h2, .contact-panel h2 { font-size: clamp(2.05rem, 4vw, 3.45rem); line-height: 1.1; letter-spacing: -0.045em; font-weight: 500; max-width: 18ch; }
.section-intro p { color: var(--text-2); font-size: 1.08rem; max-width: 57ch; }
.section-kicker { color: var(--accent); font: 500 0.73rem/1.4 var(--mono); letter-spacing: 0.19em; text-transform: uppercase; }
.text-link { color: var(--text-2); border: none; font: 500 0.76rem/1.4 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; white-space: nowrap; }
.text-link span { color: var(--accent); margin-left: 0.35rem; }

.capability-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 1rem; }
.capability-card { min-height: 15rem; padding: clamp(1.5rem, 3vw, 2.2rem); background: var(--bg-subtle); border: 1px solid var(--border); border-radius: 10px; display: grid; grid-template-columns: 2rem 1fr; gap: 1rem; box-shadow: var(--shadow-card); }
.capability-card--wide { grid-row: span 2; min-height: 31rem; background: linear-gradient(145deg, color-mix(in srgb, var(--accent) 7%, var(--bg-subtle)), var(--bg-subtle) 58%); }
.capability-card__num { color: var(--accent); font: 600 0.78rem/1 var(--mono); padding-top: 0.45rem; }
.capability-card h3 { font-size: clamp(1.45rem, 2.6vw, 2.1rem); letter-spacing: -0.035em; line-height: 1.15; font-weight: 500; margin-bottom: 1rem; }
.capability-card p { color: var(--text-2); max-width: 42ch; line-height: 1.7; }
.capability-card ul { list-style: none; margin-top: 4rem; display: flex; flex-direction: column; gap: 0; border-top: 1px solid var(--border); }
.capability-card li { padding: 0.9rem 0; border-bottom: 1px solid var(--border); color: var(--text); font: 500 0.78rem/1.4 var(--mono); text-transform: uppercase; letter-spacing: 0.08em; }
.capability-card li::before { content: "↳"; color: var(--accent); margin-right: 0.75rem; }

.proof-grid { display: grid; grid-template-columns: 1.25fr 0.75fr; gap: 1rem; }
.proof-card { min-height: 18rem; padding: clamp(1.5rem, 3vw, 2.2rem); border: 1px solid var(--border); border-radius: 10px; background: var(--bg-subtle); display: flex; flex-direction: column; gap: 1rem; color: inherit; box-shadow: var(--shadow-card); transition: transform 160ms ease, border-color 160ms ease, background 160ms ease; }
.proof-card:hover, .proof-card:focus-visible { transform: translateY(-3px); border-color: color-mix(in srgb, var(--accent) 55%, var(--border)); background: color-mix(in srgb, var(--accent) 4%, var(--bg-subtle)); color: inherit; }
.proof-card--feature { grid-row: span 2; min-height: 37rem; }
.proof-card--signal { background: linear-gradient(135deg, color-mix(in srgb, var(--accent-2) 8%, var(--bg-subtle)), var(--bg-subtle)); }
.proof-card__meta { display: flex; justify-content: space-between; gap: 1rem; color: var(--text-dim); font: 500 0.67rem/1.4 var(--mono); text-transform: uppercase; letter-spacing: 0.12em; }
.proof-card h3 { font-size: clamp(1.5rem, 3vw, 2.35rem); letter-spacing: -0.04em; line-height: 1.12; font-weight: 500; max-width: 16ch; }
.proof-card p { color: var(--text-2); line-height: 1.7; max-width: 45ch; }
.proof-card__metric { margin-top: auto; border-block: 1px solid var(--border); padding: 1.6rem 0; display: flex; align-items: center; gap: 1.2rem; }
.proof-card__metric strong { color: var(--accent); font-size: clamp(3rem, 5vw, 4.4rem); letter-spacing: -0.06em; font-weight: 500; line-height: 1; }
.proof-card__metric span { color: var(--text-dim); font: 500 0.7rem/1.5 var(--mono); text-transform: uppercase; letter-spacing: 0.1em; }
.proof-card__link { margin-top: auto; color: var(--text-dim); font: 500 0.72rem/1.4 var(--mono); text-transform: uppercase; letter-spacing: 0.1em; }
.proof-card__link span { color: var(--accent); }

.engagement-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.engagement-card { padding: 1.6rem; border: 1px solid var(--border); border-radius: 10px; display: flex; flex-direction: column; gap: 1.2rem; min-height: 22rem; }
.engagement-card--primary { background: var(--bg-subtle); border-color: color-mix(in srgb, var(--accent) 45%, var(--border)); box-shadow: var(--shadow-card); }
.engagement-card__head { display: flex; justify-content: space-between; color: var(--text-dim); font: 500 0.67rem/1.4 var(--mono); text-transform: uppercase; letter-spacing: 0.12em; padding-bottom: 1rem; border-bottom: 1px solid var(--border); }
.engagement-card__head span:first-child { color: var(--accent); }
.engagement-card h3 { font-size: 1.45rem; line-height: 1.25; letter-spacing: -0.025em; font-weight: 500; }
.engagement-card p { color: var(--text-2); line-height: 1.65; }
.engagement-card > a { margin-top: auto; align-self: start; color: var(--text); border-bottom-color: var(--border); font: 500 0.75rem/1.4 var(--mono); text-transform: uppercase; letter-spacing: 0.09em; }
.section-footnote { color: var(--text-dim); font-size: 0.9rem; }

.note-list { border-top: 1px solid var(--border); }
.note-list > a { display: grid; grid-template-columns: minmax(10rem, 0.4fr) 1fr 2rem; align-items: center; gap: 1.5rem; min-height: 6.5rem; border: none; border-bottom: 1px solid var(--border); color: inherit; }
.note-list > a:hover strong, .note-list > a:focus-visible strong { color: var(--accent); }
.note-list__meta { color: var(--text-dim); font: 500 0.68rem/1.4 var(--mono); text-transform: uppercase; letter-spacing: 0.11em; }
.note-list strong { font-size: 1.18rem; font-weight: 500; letter-spacing: -0.012em; transition: color 140ms ease; }
.note-list__arrow { color: var(--accent); text-align: right; }

.about-lab { background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 5%, var(--bg-subtle)), var(--bg-subtle)); margin-inline: calc(clamp(1.75rem, 5vw, 3rem) * -1); padding-inline: clamp(1.75rem, 5vw, 3rem); border-bottom: 1px solid var(--border); }
.about-lab__grid { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: clamp(3rem, 8vw, 7rem); align-items: start; }
.about-lab__copy { display: flex; flex-direction: column; gap: 1.2rem; color: var(--text-2); line-height: 1.75; font-size: 1.05rem; }
.about-lab__copy strong { color: var(--text); }
.about-lab__facts { display: flex; flex-wrap: wrap; gap: 0.55rem; padding-top: 0.5rem; }
.about-lab__facts span { color: var(--text-dim); border: 1px solid var(--border); padding: 0.42rem 0.65rem; border-radius: 999px; font: 500 0.66rem/1.4 var(--mono); text-transform: uppercase; letter-spacing: 0.09em; }

.contact-panel { margin-top: clamp(5rem, 10vw, 9rem); padding: clamp(2rem, 5vw, 4rem); border: 1px solid color-mix(in srgb, var(--accent) 42%, var(--border)); border-radius: 12px; background: radial-gradient(circle at 100% 0, color-mix(in srgb, var(--accent) 10%, transparent), transparent 22rem), var(--bg-subtle); display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 2rem; }
.contact-panel > div:first-child { display: flex; flex-direction: column; gap: 1rem; }
.contact-panel h2 { max-width: 17ch; }
.contact-panel p { color: var(--text-2); max-width: 48ch; }
.contact-panel__actions { display: flex; flex-direction: column; gap: 0.75rem; min-width: 15rem; }
.contact-panel__actions .btn { justify-content: center; }

.lab-footer { max-width: 76rem; margin-top: clamp(4rem, 8vw, 7rem); text-transform: none; letter-spacing: 0; align-items: center; }
.lab-footer__brand { color: var(--text); font: 600 0.9rem/1 var(--mono); }
.lab-footer__brand span { color: var(--accent); font-weight: 500; margin-left: 0.35rem; }

@media (max-width: 980px) {
  .lab-hero { grid-template-columns: 1fr; }
  .lab-hero__title { max-width: 13ch; }
  .system-map { max-width: 40rem; }
  .engagement-grid { grid-template-columns: 1fr; }
  .engagement-card { min-height: 0; }
  .contact-panel { grid-template-columns: 1fr; align-items: start; }
  .contact-panel__actions { flex-direction: row; min-width: 0; }
}

@media (max-width: 720px) {
  .home .container { padding-top: 1.4rem; }
  .home .brand { padding-bottom: 3.8rem; }
  .home .site-nav { flex-wrap: wrap; }
  .home .site-nav a:first-child { display: none; }
  .home .site-nav .nav-cta { padding: 0; margin: 0; border: none; border-radius: 0; color: var(--accent); }
  .ambient-grid { height: 43rem; }
  .lab-hero { gap: 2.5rem; padding-bottom: 3.5rem; }
  .lab-hero__copy { gap: 1.1rem; }
  .lab-hero__title { font-size: clamp(2.9rem, 14vw, 4rem); max-width: 10ch; }
  .lab-hero__sub { font-size: 1rem; }
  .home .hero__eyebrow { gap: 0.45rem; }
  .home .hero__eyebrow span + span { display: none; }
  .system-map__flow { padding: 0.9rem; }
  .system-node { grid-template-columns: 1.6rem 1fr; padding: 0.75rem; }
  .system-node small { grid-column: 2; }
  .system-line { margin-left: 1.7rem; }
  .system-map__foot { align-items: flex-start; flex-direction: column; gap: 0.3rem; }
  .signal-rail { margin-bottom: 3.5rem; }
  .signal-rail span { flex: 1 1 50%; border-bottom: 1px solid var(--border-dim); font-size: 0.62rem; padding-inline: 0.5rem; }
  .home-section { padding: 3.5rem 0; }
  .section-intro--split { flex-direction: column; align-items: flex-start; }
  .section-intro h2, .about-lab h2, .contact-panel h2 { font-size: 2rem; }
  .capability-grid, .proof-grid, .about-lab__grid { grid-template-columns: 1fr; }
  .capability-card, .capability-card--wide, .proof-card, .proof-card--feature { min-height: 0; grid-row: auto; }
  .capability-card ul { margin-top: 2rem; }
  .proof-card__metric { margin-top: 1.25rem; }
  .note-list > a { grid-template-columns: 1fr 1.5rem; gap: 0.7rem; padding: 1.1rem 0; }
  .note-list__meta { grid-column: 1; }
  .note-list strong { grid-column: 1; font-size: 1.05rem; }
  .note-list__arrow { grid-column: 2; grid-row: 1 / span 2; }
  .about-lab { margin-inline: -1.25rem; padding-inline: 1.25rem; }
  .about-lab__grid { gap: 2rem; }
  .contact-panel { padding: 1.5rem; margin-top: 3.5rem; }
  .contact-panel__actions { flex-direction: column; }
  .lab-footer { align-items: flex-start; flex-direction: column; }
}

/* Restrained version of the original dark layout. */
:root { --shadow-card: none; }
.skip-link { position: fixed; top: -5rem; left: 1rem; z-index: 10; padding: .5rem 1rem; background: var(--bg-chip); }
.skip-link:focus { top: 1rem; }
.anchor-target { position: absolute; }
.home .container { padding-top: 2.5rem; }
.home .brand { padding-bottom: 4rem; }
.site-nav { letter-spacing: .04em; text-transform: none; }
.site-nav .nav-cta { border: none; padding: 0 0 .15rem; margin: 0; }
.lab-hero { grid-template-columns: minmax(0, 1.5fr) minmax(12rem, .7fr); gap: 3rem; padding-bottom: 4rem; }
.lab-hero__title { font-size: clamp(2.8rem, 5.5vw, 4.7rem); line-height: 1.08; letter-spacing: -.045em; max-width: 17ch; }
.lab-hero__sub { font-size: 1.05rem; max-width: 46ch; }
.hero-cta { gap: 1.4rem; }
.wheel-art { display: grid; place-items: center; }
.wheel-button { display: block; width: 100%; max-width: 280px; padding: 12px; border: none; background: transparent; color: #b4a889; cursor: pointer; border-radius: 50%; }
.wheel-button:disabled { cursor: default; }
.wheel-button svg { display: block; width: 100%; height: auto; }
.wheel-spokes { transform-origin: 120px 120px; transform: rotate(var(--wheel-turn, 0deg)); transition: transform 1.8s cubic-bezier(.2,.65,.25,1); }
.wheel-button:hover { color: #d3c6a5; }
.home-section { padding: 3.2rem 0; gap: 1.7rem; }
.section-intro h2, .about-lab h2, .contact-panel h2 { font-size: 1.65rem; letter-spacing: -.03em; }
.capability-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.8rem; }
.capability-card { display: block; min-height: 0; background: none; border: none; border-radius: 0; box-shadow: none; padding: 0; }
.capability-card h3 { font-size: 1.05rem; margin-bottom: .6rem; }
.capability-card p { font-size: .93rem; line-height: 1.65; }
.proof-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.proof-card, .proof-card--feature { min-height: 0; grid-row: auto; padding: 1.45rem; box-shadow: none; border-radius: 6px; background: var(--bg-subtle); }
.proof-card h3, .proof-card--feature h3 { font-size: 1.25rem; }
.proof-card p { font-size: .93rem; }
.proof-card__meta { font-size: .64rem; letter-spacing: .04em; }
.note-list > a { min-height: 4.6rem; }
.note-list strong { font-size: 1.02rem; }
.about-lab { background: none; margin-inline: 0; padding-inline: 0; border-bottom: none; }
.about-lab__grid { grid-template-columns: .45fr 1fr; gap: 2rem; }
.about-lab__copy { font-size: .98rem; }
.contact-panel { position: relative; background: none; padding: 2.5rem 0 0; border: none; border-top: 1px solid var(--border); border-radius: 0; margin-top: 1rem; }
.contact-panel > div:first-of-type { display: flex; flex-direction: column; gap: .8rem; }
.contact-panel a:not(.btn) { font-size: .95rem; }
.lab-footer { margin-top: 1.5rem; }
.architecture-layers > div { padding: 1.25rem 0; border-bottom: 1px solid var(--border); }
.architecture-layers h3 { margin-bottom: .65rem; }
@media (max-width: 720px) {
  .home .container { padding-top: 1.5rem; }
  .home .brand { padding-bottom: 2.8rem; }
  .home .site-nav a:first-child { display: inline; }
  .lab-hero { grid-template-columns: 1fr; gap: 1.5rem; padding-bottom: 2.5rem; }
  .lab-hero__title { font-size: clamp(2.4rem, 10vw, 3.5rem); max-width: 17ch; }
  .lab-hero__sub { font-size: 1rem; }
  .wheel-button { max-width: 145px; padding: 6px; }
  .home-section { padding: 2.5rem 0; }
  .capability-grid, .proof-grid, .about-lab__grid { grid-template-columns: 1fr; }
  .capability-grid { gap: 1.35rem; }
  .proof-card { padding: 1.3rem; }
  .section-intro h2, .about-lab h2, .contact-panel h2 { font-size: 1.6rem; }
  .about-lab { margin-inline: 0; padding-inline: 0; }
  .contact-panel { padding: 2rem 0 0; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .wheel-spokes { transition: none; }
}