/* ============================================================
   Black Squirrel Labs — dark editorial design system
   ============================================================ */

:root {
  --bg: #a7b0b5;
  --bg-raise: #bdc5c8;
  --bg-card: #929da3;
  --panel: #34414a;
  --panel-deep: #253038;
  --bone: #f1eee5;
  --ink: #171b1d;
  --ink-dim: #353c40;
  --ink-faint: #394044;
  --accent: #f47b20;
  --accent-deep: #703008;
  --accent-on-dark: #ffb45e;
  --accent-hover: #e8b066;
  --accent-contrast: #1a1408;
  --accent-soft: rgba(244, 123, 32, 0.16);
  --accent-warm: #f47b20;
  --hairline: rgba(23, 27, 29, 0.22);
  --hairline-strong: rgba(23, 27, 29, 0.42);
  --display: "Fraunces", Georgia, serif;
  --body: "Charter", "Iowan Old Style", Georgia, "Times New Roman", serif;
  --ui: "Inter", -apple-system, "Helvetica Neue", Arial, sans-serif;
  --measure: 64ch;
  --gutter: clamp(1.25rem, 4vw, 2.5rem);
}

* { box-sizing: border-box; }

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

[id] { scroll-margin-top: 5rem; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 82% 3%, rgba(244, 123, 32, 0.08), transparent 30rem),
    var(--bg);
  color: var(--ink);
  font-family: var(--body);
  font-size: 1.0625rem;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

/* quiet ruled field over the dark editorial surface */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.18;
  background-image:
    linear-gradient(rgba(237, 230, 216, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(237, 230, 216, 0.018) 1px, transparent 1px);
  background-size: 48px 48px;
}

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

a { color: var(--ink); text-decoration-color: var(--accent-deep); text-underline-offset: 3px; }
a:hover { color: var(--accent); }

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

main { position: relative; z-index: 2; }

.skip-link {
  position: fixed;
  top: 0.7rem;
  left: 0.7rem;
  z-index: 100;
  transform: translateY(-180%);
  padding: 0.65rem 0.85rem;
  background: var(--panel-deep);
  color: var(--bone);
  font-family: var(--ui);
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: none;
}

.skip-link:focus { transform: translateY(0); }

/* ---------- shared primitives ---------- */

.wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.eyebrow {
  font-family: var(--ui);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 1.4rem;
}

.eyebrow::before {
  content: "";
  width: 1.6rem;
  height: 1px;
  background: var(--accent-deep);
}

.display {
  font-family: var(--display);
  font-weight: 400;
  letter-spacing: -0.015em;
  line-height: 1.05;
  margin: 0;
}

section { padding: clamp(4.5rem, 10vw, 8rem) 0; }
section + section { border-top: 1px solid var(--hairline); }

/* ---------- nav ---------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--hairline);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 0.9rem;
  padding-bottom: 0.9rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--ui);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
}

.brand:hover { color: var(--ink); }
.brand img { height: 20px; width: auto; flex: none; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.6rem;
  font-family: var(--ui);
  font-size: 0.82rem;
  font-weight: 500;
}

.nav-links a { text-decoration: none; color: var(--ink-dim); }
.nav-links a:hover { color: var(--ink); }

.mobile-menu { display: none; position: relative; font-family: var(--ui); }

.mobile-menu summary {
  list-style: none;
  cursor: pointer;
  border: 1px solid var(--hairline-strong);
  padding: 0.5rem 0.7rem;
  color: var(--ink);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.mobile-menu summary::-webkit-details-marker { display: none; }

.mobile-menu-panel {
  position: absolute;
  top: calc(100% + 0.65rem);
  right: 0;
  width: min(18rem, calc(100vw - 2.5rem));
  display: grid;
  padding: 0.7rem;
  border: 1px solid var(--hairline-strong);
  background: var(--bg-raise);
  box-shadow: 0 1rem 2.5rem rgba(23, 27, 29, 0.2);
}

.mobile-menu-panel a {
  padding: 0.8rem 0.65rem;
  border-bottom: 1px solid var(--hairline);
  color: var(--ink);
  font-size: 0.86rem;
  text-decoration: none;
}

.mobile-menu-panel a:last-child { border-bottom: 0; color: var(--accent-deep); font-weight: 600; }

.btn {
  display: inline-block;
  font-family: var(--ui);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--accent-contrast);
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 3px;
  padding: 0.55rem 1.05rem;
  text-decoration: none;
  cursor: pointer;
  transition: background 140ms ease, color 140ms ease;
}

.btn:hover { background: var(--accent-hover); color: var(--accent-contrast); }
.btn:active { transform: translateY(1px); }

@media (max-width: 720px) {
  .nav-links { display: none; }
  .mobile-menu { display: block; }
}

/* ---------- hero ---------- */

.hero { padding: clamp(5rem, 13vw, 10rem) 0 clamp(4.5rem, 10vw, 8rem); }

.hero .wrap { position: relative; }

.hero-art {
  position: absolute;
  z-index: -1;
  right: calc(var(--gutter) * 0.5);
  top: 50%;
  transform: translateY(-52%);
  width: clamp(260px, 28vw, 430px);
  height: auto;
  pointer-events: none;
  user-select: none;
}

@media (max-width: 940px) {
  .hero-art { display: none; }
}

.hero h1 {
  font-size: clamp(2.9rem, 8.2vw, 6.2rem);
  max-width: 14ch;
}

.hero h1 em {
  font-style: italic;
  font-weight: 350;
  color: var(--accent);
}

.hero .lede {
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  line-height: 1.55;
  color: var(--ink-dim);
  max-width: 56ch;
  margin: 1.8rem 0 2.6rem;
}

/* ---------- subscribe form ---------- */

.sub-form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  max-width: 34rem;
}

.sub-form input[type="email"] {
  flex: 1 1 16rem;
  font-family: var(--ui);
  font-size: 0.95rem;
  color: var(--ink);
  background: var(--bg-raise);
  border: 1px solid var(--hairline-strong);
  border-radius: 3px;
  padding: 0.78rem 0.95rem;
}

.sub-form input[type="email"]::placeholder { color: var(--ink-faint); }

.sub-form input[type="email"]:focus {
  outline: none;
  border-color: var(--accent);
}

.sub-form .btn { padding: 0.78rem 1.3rem; font-size: 0.92rem; }
.sub-form .btn[disabled] { opacity: 0.6; cursor: wait; }

.sub-note {
  font-family: var(--ui);
  font-size: 0.78rem;
  color: var(--ink-faint);
  margin-top: 0.85rem;
}

.sub-note a { color: inherit; }
.sub-band .sub-note a { color: var(--accent-on-dark); }

.sub-msg {
  font-family: var(--ui);
  font-size: 0.9rem;
  margin-top: 0.85rem;
  display: none;
}

.sub-msg.ok { display: block; color: var(--accent); }
.sub-msg.err { display: block; color: #d97c5a; }

.hp { position: absolute; left: -5000px; opacity: 0; pointer-events: none; }

/* ---------- premise ---------- */

.premise-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: start;
}

.premise-grid h2 {
  font-size: clamp(1.9rem, 3.6vw, 2.9rem);
  line-height: 1.12;
}

.premise-copy p { margin: 0 0 1.15rem; color: var(--ink-dim); }
.premise-copy p strong { color: var(--ink); font-weight: 600; }

@media (max-width: 820px) {
  .premise-grid { grid-template-columns: 1fr; }
}

.pull {
  border-top: 1px solid var(--hairline);
  margin-top: clamp(2.5rem, 6vw, 4rem);
  padding-top: clamp(2.5rem, 6vw, 4rem);
}

.pull p {
  font-family: var(--display);
  font-size: clamp(1.7rem, 4.4vw, 3.1rem);
  line-height: 1.18;
  margin: 0;
  max-width: 24ch;
}

.pull p em { color: var(--accent); font-style: italic; font-weight: 350; }

/* ---------- not / is ---------- */

.nots { display: grid; gap: 0; max-width: 760px; }

.nots .not {
  font-family: var(--display);
  font-size: clamp(1.5rem, 3.4vw, 2.4rem);
  line-height: 1.2;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--hairline);
  color: var(--ink-faint);
}

.nots .not strong { color: var(--ink); font-weight: 500; }
.nots .not .x { color: var(--accent); font-style: italic; }

.is-copy { max-width: var(--measure); margin-top: 2.4rem; }
.is-copy p { margin: 0 0 1.15rem; color: var(--ink-dim); }
.is-copy p strong { color: var(--ink); }

.layer-line {
  font-family: var(--display);
  font-size: clamp(1.25rem, 2.6vw, 1.7rem);
  font-style: italic;
  color: var(--accent);
  margin-top: 1.8rem;
}

/* ---------- signals grid ---------- */

.sig-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
  margin-top: 3rem;
}

@media (max-width: 920px) { .sig-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 600px) { .sig-grid { grid-template-columns: 1fr; } }

.sig {
  background: var(--bg);
  padding: 1.9rem 1.7rem 2.1rem;
  position: relative;
}

.sig .num {
  font-family: var(--display);
  font-size: 0.95rem;
  font-style: italic;
  color: var(--accent);
  display: block;
  margin-bottom: 1.2rem;
}

.sig h3 {
  font-family: var(--display);
  font-weight: 500;
  font-size: 1.35rem;
  line-height: 1.25;
  margin: 0 0 0.6rem;
}

.sig p {
  font-family: var(--ui);
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--ink-dim);
  margin: 0;
}

.sig.sig-cta {
  background: var(--bg-card);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.5rem;
}

.sig.sig-cta p {
  font-family: var(--display);
  font-size: 1.25rem;
  font-style: italic;
  color: var(--ink);
  line-height: 1.35;
}

.sig.sig-cta a {
  font-family: var(--ui);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
}

.sig.sig-cta a:hover { text-decoration: underline; text-decoration-color: var(--accent); }

/* ---------- writing ---------- */

.issues { display: grid; gap: 1px; background: var(--hairline); border: 1px solid var(--hairline); margin-top: 3rem; }

.issue {
  display: grid;
  grid-template-columns: 9rem minmax(0, 1fr) auto;
  gap: 1.5rem;
  align-items: baseline;
  background: var(--bg);
  padding: 1.8rem 1.7rem;
  text-decoration: none;
  transition: background 140ms ease;
}

.issue:hover { background: var(--bg-card); }

.issue .meta {
  font-family: var(--ui);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
  line-height: 1.7;
}

.issue .meta .no { color: var(--accent); display: block; }

.issue h3 {
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(1.3rem, 2.4vw, 1.7rem);
  line-height: 1.25;
  margin: 0 0 0.45rem;
  color: var(--ink);
}

.issue:hover h3 { color: var(--accent); }

.issue p {
  font-family: var(--ui);
  font-size: 0.88rem;
  color: var(--ink-dim);
  margin: 0;
  max-width: 58ch;
}

.issue .arrow {
  font-family: var(--display);
  font-size: 1.4rem;
  color: var(--accent);
  align-self: center;
}

@media (max-width: 720px) {
  .issue { grid-template-columns: 1fr; gap: 0.8rem; }
  .issue .arrow { display: none; }
}

.issues-note {
  font-family: var(--ui);
  font-size: 0.82rem;
  color: var(--ink-faint);
  margin-top: 1.1rem;
}

/* ---------- about ---------- */

.about-copy { max-width: var(--measure); }
.about-copy p { color: var(--ink-dim); margin: 0 0 1.15rem; }
.about-copy p strong { color: var(--ink); }
.about-copy .links { font-family: var(--ui); font-size: 0.9rem; margin-top: 1.6rem; }
.about-copy .links a { color: var(--accent); font-weight: 600; text-decoration: none; }
.about-copy .links a:hover { text-decoration: underline; }

/* ---------- subscribe band ---------- */

.sub-band { text-align: left; }

.sub-band h2 {
  font-size: clamp(2rem, 4.6vw, 3.4rem);
  max-width: 18ch;
  margin-bottom: 2rem;
}

/* ---------- footer ---------- */

footer {
  border-top: 1px solid var(--hairline);
  padding: 2.2rem 0 3rem;
  position: relative;
  z-index: 2;
}

.foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-family: var(--ui);
  font-size: 0.78rem;
  color: var(--ink-faint);
}

.foot a { color: var(--ink-dim); text-decoration: none; }
.foot a:hover { color: var(--accent); }
.foot .mark { display: flex; align-items: center; gap: 0.55rem; }
.foot .mark img { height: 16px; width: auto; }
.foot-links { display: flex; align-items: center; gap: 1rem; }

/* ============================================================
   Homepage — working lab presentation
   ============================================================ */

.hero {
  min-height: min(820px, calc(100vh - 64px));
  display: flex;
  align-items: center;
  padding: clamp(4.5rem, 9vw, 8rem) 0;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.82fr);
  gap: clamp(2.5rem, 7vw, 7rem);
  align-items: center;
}

.hero-copy { position: relative; z-index: 2; }

.hero h1 {
  font-size: clamp(3rem, 7.2vw, 6.45rem);
  max-width: 12ch;
}

.hero .lede {
  max-width: 54ch;
  margin: 2rem 0 2.15rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.1rem 1.4rem;
}

.btn-large {
  padding: 0.82rem 1.2rem;
  font-size: 0.9rem;
}

.text-link {
  font-family: var(--ui);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--ink-dim);
  text-decoration: none;
}

.text-link span { color: var(--accent); padding-left: 0.35rem; }
.text-link:hover { color: var(--ink); }

.hero-proof {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  width: fit-content;
  margin-top: 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--hairline);
  font-family: var(--ui);
  font-size: 0.76rem;
  letter-spacing: 0.03em;
  color: var(--ink-faint);
}

.hero-proof strong {
  color: var(--ink-dim);
  font-weight: 600;
  margin-right: 0.45rem;
}

.status-dot {
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 5px var(--accent-soft);
  flex: none;
}

.specimen-card {
  position: relative;
  min-height: 540px;
  display: grid;
  grid-template-rows: auto 1fr auto;
  overflow: hidden;
  border: 1px solid var(--hairline-strong);
  background:
    linear-gradient(145deg, rgba(255,255,255,0.025), transparent 46%),
    var(--bg-card);
}

.specimen-card::before,
.specimen-card::after {
  content: "";
  position: absolute;
  width: 2.1rem;
  height: 2.1rem;
  border-color: var(--accent-warm);
  opacity: 0.7;
}

.specimen-card::before {
  top: 2.4rem;
  left: 1.2rem;
  border-top: 1px solid;
  border-left: 1px solid;
}

.specimen-card::after {
  right: 1.2rem;
  bottom: 2.4rem;
  border-right: 1px solid;
  border-bottom: 1px solid;
}

.specimen-meta,
.specimen-caption {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.2rem;
  font-family: var(--ui);
  font-size: 0.63rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.specimen-meta { border-bottom: 1px solid var(--hairline); }
.specimen-meta span:last-child { color: var(--accent); }

.specimen-card img {
  align-self: center;
  justify-self: center;
  width: min(110%, 590px);
  max-width: none;
  height: auto;
  transform: translateX(-2%);
  filter: drop-shadow(0 1.6rem 2.5rem rgba(0,0,0,0.42));
}

.specimen-caption {
  border-top: 1px solid var(--hairline);
  letter-spacing: 0.1em;
}

.specimen-caption strong {
  color: var(--ink-dim);
  font-weight: 500;
}

.lab-section {
  background:
    linear-gradient(135deg, rgba(243, 166, 74, 0.12), transparent 32rem),
    var(--bg-raise);
}

.experiment-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.84fr);
  gap: clamp(2.5rem, 7vw, 6.5rem);
  align-items: start;
}

.experiment-copy h2,
.section-head h2,
.about-grid h2 {
  font-size: clamp(2.2rem, 4.8vw, 4rem);
  max-width: 16ch;
}

.section-lede {
  font-family: var(--display);
  font-size: clamp(1.25rem, 2.4vw, 1.65rem);
  line-height: 1.42;
  color: var(--ink);
  max-width: 34ch;
  margin: 1.8rem 0 1.2rem;
}

.experiment-copy > p:not(.section-lede) {
  max-width: 58ch;
  color: var(--ink-dim);
}

.experiment-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 2rem;
}

.experiment-tags span {
  border: 1px solid var(--hairline-strong);
  padding: 0.45rem 0.65rem;
  font-family: var(--ui);
  font-size: 0.7rem;
  color: var(--ink-dim);
  background: rgba(14, 12, 9, 0.3);
}

.run-card {
  border: 1px solid var(--hairline-strong);
  background: var(--bg);
  box-shadow: 0 1.8rem 4rem rgba(0,0,0,0.2);
}

.run-head,
.run-title,
.run-metrics,
.run-note { padding-left: 1.3rem; padding-right: 1.3rem; }

.run-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 0.9rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px solid var(--hairline);
  font-family: var(--ui);
  font-size: 0.63rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--ink-faint);
}

.run-status { color: var(--accent); }

.run-title {
  display: grid;
  gap: 0.25rem;
  padding-top: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--hairline);
  font-family: var(--ui);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.run-title strong {
  font-family: var(--display);
  font-size: 1.5rem;
  font-weight: 400;
  letter-spacing: 0;
  text-transform: none;
  color: var(--ink);
}

.run-metrics { margin: 0; }

.run-metrics div {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--hairline);
  font-family: var(--ui);
  font-size: 0.72rem;
}

.run-metrics dt { color: var(--ink-faint); }
.run-metrics dd { margin: 0; color: var(--ink); font-weight: 600; letter-spacing: 0.06em; }

.sim-flow {
  display: grid;
  grid-template-columns: auto 1fr auto 1fr auto;
  align-items: center;
  gap: 0.6rem;
  margin: 1.4rem 1.3rem;
  font-family: var(--ui);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

.sim-flow i {
  height: 1px;
  background: linear-gradient(90deg, var(--accent-warm), var(--hairline-strong));
}

.run-note {
  margin: 0;
  padding-top: 1rem;
  padding-bottom: 1.2rem;
  border-top: 1px solid var(--hairline);
  font-family: var(--ui);
  font-size: 0.75rem;
  line-height: 1.55;
  color: var(--ink-faint);
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(240px, 0.65fr);
  gap: clamp(2rem, 7vw, 7rem);
  align-items: end;
}

.section-head > p {
  margin: 0 0 0.25rem;
  color: var(--ink-dim);
  max-width: 38ch;
}

.method-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 3.5rem;
  border: 1px solid var(--hairline);
  background: var(--hairline);
}

.method-step {
  min-height: 270px;
  padding: 1.7rem;
  background: var(--bg);
}

.step-no {
  display: block;
  margin-bottom: 3rem;
  font-family: var(--display);
  font-style: italic;
  color: var(--accent);
}

.method-step h3 {
  margin: 0 0 0.7rem;
  font-family: var(--display);
  font-size: 1.45rem;
  font-weight: 500;
}

.method-step p {
  margin: 0;
  font-family: var(--ui);
  font-size: 0.86rem;
  line-height: 1.65;
  color: var(--ink-dim);
}

.premise-section { background: var(--bg-card); }

.thesis-line {
  display: grid;
  grid-template-columns: 9rem minmax(0, 1fr);
  gap: 2rem;
  align-items: start;
  margin-top: clamp(3rem, 7vw, 5rem);
  padding-top: clamp(2.5rem, 5vw, 4rem);
  border-top: 1px solid var(--hairline-strong);
}

.thesis-line > span {
  font-family: var(--ui);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--accent);
}

.thesis-line p {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(1.9rem, 4.8vw, 3.7rem);
  line-height: 1.08;
  max-width: 20ch;
}

.thesis-line em { color: var(--accent); font-weight: 350; }

.about-grid,
.subscribe-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1fr);
  gap: clamp(2.5rem, 8vw, 8rem);
  align-items: start;
}

.subscribe-grid h2 { max-width: 16ch; }

.subscribe-copy {
  margin: 0 0 1.6rem;
  max-width: 46ch;
  color: var(--ink-dim);
}

.sub-band {
  background:
    radial-gradient(circle at 10% 100%, rgba(243, 166, 74, 0.13), transparent 24rem),
    var(--bg-raise);
}

@media (max-width: 900px) {
  .hero { min-height: auto; }
  .hero-grid,
  .experiment-grid,
  .about-grid,
  .subscribe-grid { grid-template-columns: 1fr; }
  .hero-grid { gap: 3.5rem; }
  .specimen-card { min-height: 440px; }
  .specimen-card img { width: min(92%, 560px); }
  .section-head { grid-template-columns: 1fr; gap: 1.25rem; }
  .method-grid { grid-template-columns: 1fr; }
  .method-step { min-height: 0; }
  .step-no { margin-bottom: 1.5rem; }
}

@media (max-width: 600px) {
  .hero { padding-top: 4rem; }
  .hero h1 { font-size: clamp(2.8rem, 16vw, 4.4rem); }
  .hero-actions { align-items: flex-start; flex-direction: column; }
  .specimen-card { min-height: 360px; }
  .specimen-card img { width: 110%; }
  .specimen-meta,
  .specimen-caption { font-size: 0.56rem; }
  .hero-proof { line-height: 1.5; }
  .thesis-line { grid-template-columns: 1fr; gap: 1rem; }
  .run-head { align-items: flex-start; flex-direction: column; }
}

/* ============================================================
   Essay pages
   ============================================================ */

.article-head { padding: clamp(4rem, 9vw, 7rem) 0 clamp(2.5rem, 5vw, 4rem); }

.article-head h1 {
  font-size: clamp(2.2rem, 5.6vw, 4rem);
  max-width: 20ch;
}

.article-head .dek {
  font-family: var(--display);
  font-style: italic;
  font-weight: 350;
  font-size: clamp(1.15rem, 2.4vw, 1.5rem);
  color: var(--ink-dim);
  max-width: 36ch;
  line-height: 1.4;
  margin: 1.4rem 0 0;
}

.article-head .byline {
  font-family: var(--ui);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-top: 2.2rem;
}

.article-head .byline strong { color: var(--ink-dim); font-weight: 600; }

article.essay {
  max-width: calc(var(--measure) + 2 * var(--gutter));
  margin: 0 auto;
  padding: 0 var(--gutter) clamp(3rem, 7vw, 5rem);
  font-size: 1.125rem;
  line-height: 1.72;
}

article.essay > * { margin: 0 0 1.3rem; }

article.essay p { color: var(--ink-dim); }
article.essay p strong { color: var(--ink); }
article.essay p em { color: var(--ink); }

article.essay h2 {
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(1.45rem, 3vw, 1.9rem);
  line-height: 1.25;
  color: var(--ink);
  margin: 3rem 0 1.1rem;
}

article.essay h2 .signum {
  display: block;
  font-size: 0.78rem;
  font-family: var(--ui);
  font-weight: 600;
  font-style: normal;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.55rem;
}

article.essay ul { padding-left: 1.2rem; color: var(--ink-dim); }
article.essay li { margin-bottom: 0.4rem; }
article.essay li::marker { color: var(--accent); }

article.essay .kicker {
  font-family: var(--display);
  font-size: clamp(1.35rem, 3vw, 1.8rem);
  font-style: italic;
  line-height: 1.3;
  color: var(--ink);
  border-top: 1px solid var(--hairline);
  padding-top: 2rem;
  margin-top: 2.6rem;
}

article.essay .kicker em { color: var(--accent); }

article.essay hr {
  border: none;
  border-top: 1px solid var(--hairline);
  margin: 2.6rem 0;
}

article.essay .next-note {
  font-family: var(--ui);
  font-size: 0.88rem;
  font-style: italic;
  color: var(--ink-faint);
}

.essay-cta {
  background: var(--bg-card);
  border: 1px solid var(--hairline-strong);
  border-radius: 4px;
  padding: 1.8rem 1.7rem;
  margin: 3rem 0 0;
}

.essay-cta p {
  font-family: var(--display);
  font-size: 1.2rem;
  font-style: italic;
  color: var(--ink) !important;
  margin: 0 0 1.1rem;
}

.privacy-head h1 { max-width: 14ch; }
.privacy-copy > h2:first-child { margin-top: 0; }

.crumb {
  font-family: var(--ui);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--ink-faint);
  text-decoration: none;
  display: inline-block;
  margin-bottom: 2rem;
}

.crumb:hover { color: var(--accent); }

/* ============================================================
   Field Journal × Slate Ledger hybrid
   ============================================================ */

body::before {
  opacity: 0.22;
  background-image: radial-gradient(rgba(23, 27, 29, 0.28) 0.7px, transparent 0.7px);
  background-size: 8px 8px;
}

.wrap { max-width: 1280px; }

.eyebrow,
.sig .num,
.issue .meta .no,
.step-no,
.layer-line,
.about-copy .links a,
.crumb:hover { color: var(--accent-deep); }

.eyebrow::before { background: var(--accent-deep); }

.nav {
  background: color-mix(in srgb, var(--bg) 94%, transparent);
  border-color: var(--hairline-strong);
}

.nav-inner {
  padding-top: 1rem;
  padding-bottom: 1rem;
}

.brand,
.brand:hover,
.nav-links a { color: var(--ink); }

.nav-links .btn,
.nav-links .btn:hover { color: #17110b; }

.hero {
  min-height: auto;
  padding: 0;
  background: transparent;
}

.hero-grid {
  grid-template-columns: minmax(0, 1.12fr) minmax(390px, 0.88fr);
  gap: 0;
  align-items: stretch;
  border-left: 1px solid var(--hairline-strong);
  border-right: 1px solid var(--hairline-strong);
}

.hero-copy {
  min-height: 720px;
  padding: clamp(3.5rem, 6vw, 6rem) clamp(2.4rem, 5vw, 5.25rem) 2.4rem;
  border-right: 1px solid var(--hairline-strong);
  display: flex;
  flex-direction: column;
}

.hero-copy::after {
  content: "01 / PUBLIC RESEARCH LEDGER";
  position: absolute;
  right: -0.75rem;
  top: 50%;
  writing-mode: vertical-rl;
  transform: translateY(-50%);
  padding: 0.8rem 0;
  background: var(--bg);
  font-family: var(--ui);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--ink);
}

.hero h1 {
  max-width: 9ch;
  font-size: clamp(4.1rem, 7.4vw, 7.2rem);
  line-height: 0.88;
  letter-spacing: -0.04em;
}

.hero h1 em {
  color: var(--accent);
  background: transparent;
  padding: 0;
}

.hero .lede {
  margin: auto 0 1.8rem;
  max-width: 44ch;
  color: var(--ink);
  font-size: clamp(1.08rem, 1.7vw, 1.25rem);
}

.hero-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.6rem;
  align-items: stretch;
}

.hero-actions .btn,
.hero-actions .text-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 3.8rem;
  border: 0;
  border-top: 2px solid var(--hairline-strong);
  border-radius: 0;
  padding: 0.8rem 0;
  background: transparent;
  color: var(--ink);
  font-family: var(--ui);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hero-actions .btn {
  border-top-color: var(--accent);
  background: transparent;
  color: var(--accent-deep);
  padding: 0.8rem 0;
  box-shadow: none;
}

.hero-actions .btn:hover,
.hero-actions .text-link:hover {
  background: transparent;
  color: var(--accent-deep);
  transform: translateX(3px);
}

.hero-proof {
  width: 100%;
  color: var(--ink-faint);
  border-top-color: var(--hairline);
}

.hero-proof strong { color: var(--ink); }

.specimen-card {
  min-height: 720px;
  border: 0;
  background: var(--bg-raise);
  box-shadow: none;
}

.specimen-card::before {
  inset: 1.7rem 1.7rem auto;
  width: auto;
  height: 0.75rem;
  border: 0;
  background: var(--accent);
  opacity: 1;
}

.specimen-card::after {
  content: "01";
  right: 1.6rem;
  bottom: -1.4rem;
  width: auto;
  height: auto;
  border: 0;
  color: rgba(23, 27, 29, 0.12);
  font-family: var(--display);
  font-size: 9rem;
  line-height: 1;
  opacity: 1;
}

.specimen-meta {
  border: 0;
  padding: 3.4rem 1.7rem 1rem;
  color: var(--ink-faint);
}

.specimen-meta span:last-child { color: var(--accent-deep); }

.specimen-card img {
  width: min(135%, 760px);
  transform: translateX(11%);
  filter: drop-shadow(0 1.8rem 1.3rem rgba(23, 27, 29, 0.18));
}

.specimen-caption {
  border-top: 2px solid var(--accent);
  margin: 0 1.7rem;
  padding: 1rem 0 1.3rem;
  color: var(--ink-faint);
}

.specimen-caption strong { color: var(--ink); }

.lab-section {
  background: var(--bg-raise);
}

.experiment-tags span {
  color: var(--ink);
  background: rgba(23, 27, 29, 0.06);
  border-color: var(--hairline);
}

.run-card {
  background: var(--panel);
  color: var(--bone);
  border-color: rgba(241, 238, 229, 0.28);
  box-shadow: 14px 14px 0 var(--panel-deep);
}

.run-head,
.run-title,
.run-metrics div,
.run-note { border-color: rgba(241, 238, 229, 0.18); }

.run-head,
.run-title,
.run-metrics dt,
.run-note,
.sim-flow { color: rgba(241, 238, 229, 0.72); }

.run-status { color: var(--accent-on-dark); }
.run-title strong,
.run-metrics dd { color: var(--bone); }

#method { background: var(--bg); }

.method-grid {
  gap: 0;
  background: transparent;
  border-color: var(--hairline-strong);
}

.method-step {
  background: transparent;
  border-right: 1px solid var(--hairline-strong);
}

.method-step:last-child { border-right: 0; }

.premise-section {
  background: var(--panel);
  color: var(--bone);
}

.premise-section .eyebrow,
.premise-section .thesis-line em { color: var(--accent-on-dark); }

.premise-section .eyebrow::before { background: var(--accent-on-dark); }

.premise-grid h2,
.premise-copy p strong,
.thesis-line p { color: var(--bone); }

.premise-copy p { color: rgba(241, 238, 229, 0.78); }

.thesis-line { border-color: rgba(241, 238, 229, 0.25); }

#signals { background: var(--bg-raise); }

.sig-grid,
.issues {
  background: transparent;
  border-color: var(--hairline-strong);
}

.sig {
  background: transparent;
  border-right: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}

.sig.sig-cta { background: var(--panel); }
.sig.sig-cta p { color: var(--bone); }
.sig.sig-cta a { color: var(--accent-on-dark); }

#writing { background: var(--bg); }

.issue {
  background: transparent;
  border-bottom: 1px solid var(--hairline);
}

.issue:hover { background: rgba(241, 238, 229, 0.18); }

#about { background: var(--bg-raise); }

.sub-band {
  background: var(--panel);
  color: var(--bone);
}

.sub-band .eyebrow { color: var(--accent-on-dark); }
.sub-band .eyebrow::before { background: var(--accent-on-dark); }
.sub-band h2 { color: var(--bone); }
.subscribe-copy,
.sub-band .sub-note { color: rgba(241, 238, 229, 0.76); }

.sub-band .sub-form input[type="email"] {
  color: var(--ink);
  background: var(--bone);
  border-color: transparent;
}

footer {
  background: var(--panel-deep);
  border-color: transparent;
}

.foot,
.foot a { color: rgba(241, 238, 229, 0.74); }

.article-head { background: var(--bg); }

article.essay {
  max-width: calc(68ch + 2 * var(--gutter));
}

.essay-cta {
  background: var(--bg-raise);
  border-color: var(--hairline-strong);
  border-radius: 0;
}

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-copy {
    min-height: 680px;
    border-right: 0;
    border-bottom: 1px solid var(--hairline-strong);
  }
  .hero-copy::after { display: none; }
  .specimen-card { min-height: 520px; }
  .method-step {
    border-right: 0;
    border-bottom: 1px solid var(--hairline-strong);
  }
  .method-step:last-child { border-bottom: 0; }
}

@media (max-width: 600px) {
  .hero-copy {
    min-height: 620px;
    padding: 3.2rem 1.4rem 2rem;
  }
  .hero h1 {
    font-size: clamp(3.4rem, 17vw, 5rem);
    max-width: 8.4ch;
  }
  .hero-actions { grid-template-columns: 1fr; gap: 0.6rem; }
  .specimen-card { min-height: 400px; }
  .specimen-card img { width: 125%; transform: translateX(5%); }
}

@media (min-width: 901px) {
  .hero h1 {
    max-width: 10.2ch;
    font-size: clamp(4.1rem, 6.2vw, 6.4rem);
    line-height: 0.94;
    margin-bottom: clamp(2rem, 3vw, 3.25rem);
    text-wrap: balance;
  }
}