/* TalkingScientist Ventures LLC — site stylesheet (design v2, "Signage")
   Static, no JavaScript. Light/dark via prefers-color-scheme.
   Ink + cool paper + one safety-orange accent, used sparingly. */

:root {
  --paper: #f4f4f2;
  --ink: #181815;
  --ink-soft: #55524a;
  --rule: #d8d7d2;
  --rule-strong: #181815;
  --accent: #d84910;        /* marks and rules only */
  --accent-text: #b23c06;   /* links, CTA background (5.4:1 on paper) */
  --accent-ink: #ffffff;
  --display: "Barlow Semi Condensed", "Arial Narrow", Arial, sans-serif;
  --sans: "Public Sans", "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #1a1a17;
    --ink: #e9e7e1;
    --ink-soft: #a5a297;
    --rule: #3a3a35;
    --rule-strong: #e9e7e1;
    --accent: #ff8a4d;
    --accent-text: #ff8a4d;
    --accent-ink: #1a1a17;
  }
}

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

html { font-size: 100%; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 66rem; margin: 0 auto; padding: 0 1.5rem; }

/* Skip link: visually hidden until keyboard focus */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--display);
  font-weight: 600;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  text-decoration: none;
  padding: 0.6rem 1.2rem;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
  outline: 2px solid var(--accent-text);
  outline-offset: 2px;
}

a { color: var(--accent-text); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible, .cta:focus-visible { outline: 2px solid var(--accent-text); outline-offset: 2px; }

/* ---------- Header ---------- */

.site-header { border-bottom: 3px solid var(--rule-strong); }

.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding-top: 1.3rem;
  padding-bottom: 1rem;
}

.wordmark {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.45rem;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
}

.wordmark .llc {
  font-family: var(--sans);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
  margin-left: 0.45rem;
  vertical-align: 0.2em;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  font-family: var(--display);
  font-weight: 600;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.site-nav a { color: var(--ink); text-decoration: none; }
.site-nav a:hover { color: var(--accent-text); }
.site-nav a[aria-current="page"] {
  color: var(--accent-text);
  border-bottom: 3px solid var(--accent);
  padding-bottom: 1px;
}

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

.hero { padding: 4rem 0 3.5rem; }

.hero-mark { width: 5.5rem; height: 0.5rem; background: var(--accent); margin-bottom: 1.6rem; }

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  gap: 2rem 4rem;
  align-items: end;
}

h1 {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  line-height: 1.02;
  letter-spacing: -0.005em;
}

.hero-grid h1 { font-size: clamp(2.7rem, 7vw, 5rem); }

.lede {
  font-size: 1.1rem;
  line-height: 1.6;
  color: var(--ink-soft);
  max-width: 40rem;
  padding-bottom: 0.4rem;
}

.hero > .lede { margin-top: 1.4rem; }

@media (max-width: 44rem) {
  .hero { padding: 2.8rem 0 2.4rem; }
  .hero-grid { grid-template-columns: 1fr; }
}

/* ---------- Spec-sheet sections: label rail left, content right ---------- */

.spec { border-top: 1px solid var(--rule-strong); padding: 2.5rem 0 3rem; }

.spec-grid {
  display: grid;
  grid-template-columns: 13rem minmax(0, 1fr);
  gap: 1rem 4rem;
}

.spec h2 {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.3rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  line-height: 1.3;
}

.spec p, .spec ul.plain { max-width: 44rem; }
.spec p + p { margin-top: 1rem; }

ul.plain { list-style: none; }
ul.plain li { padding: 0.9rem 0; border-bottom: 1px solid var(--rule); }
ul.plain li:first-child { padding-top: 0.2rem; }
ul.plain strong { display: block; }
ul.plain li { color: var(--ink-soft); }
ul.plain strong { color: var(--ink); }

@media (max-width: 44rem) {
  .spec-grid { grid-template-columns: 1fr; }
  .spec { padding: 2rem 0 2.2rem; }
}

/* ---------- Ledger (term / description rows) ---------- */

.ledger { list-style: none; }

.ledger li {
  display: grid;
  grid-template-columns: 11rem minmax(0, 1fr);
  gap: 1.5rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--rule);
}

.ledger li:first-child { padding-top: 0.2rem; }
.ledger .term { font-weight: 700; }
.ledger .desc { color: var(--ink-soft); max-width: 40rem; }

@media (max-width: 44rem) {
  .ledger li { grid-template-columns: 1fr; gap: 0.2rem; }
}

/* ---------- Product (full-width band, no card) ---------- */

.product {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: 1rem 4rem;
  align-items: start;
}

.product-name {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: 1;
  text-transform: uppercase;
}

.product-kind { color: var(--ink-soft); font-size: 0.95rem; margin-top: 0.5rem; }

.cta {
  display: inline-block;
  margin-top: 1.3rem;
  background: var(--accent-text);
  color: var(--accent-ink);
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.05rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  text-decoration: none;
  padding: 0.65rem 1.3rem;
}

.cta:hover { background: var(--ink); color: var(--paper); }

.note { color: var(--ink-soft); font-size: 0.95rem; margin-top: 1.6rem; max-width: 44rem; }

@media (max-width: 44rem) {
  .product { grid-template-columns: 1fr; }
}

/* ---------- Details (registered facts on about/contact) ---------- */

.details { max-width: 44rem; }

.details > div {
  display: grid;
  grid-template-columns: 11rem minmax(0, 1fr);
  gap: 1.5rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--rule);
}

.details > div:first-child { padding-top: 0.2rem; }

.details dt {
  font-family: var(--display);
  font-weight: 600;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}

@media (max-width: 44rem) {
  .details > div { grid-template-columns: 1fr; gap: 0.1rem; }
}

/* ---------- Legal pages (long-form reading column) ---------- */

.legal .wrap { max-width: 48rem; }

.legal h1 { font-size: clamp(2.2rem, 5vw, 3.2rem); }

.legal .wrap > h1 { padding-top: 3rem; }

.doc-meta { color: var(--ink-soft); font-size: 0.92rem; margin: 0.9rem 0 2.4rem; }

.legal section { border-top: 1px solid var(--rule); padding: 1.8rem 0 0.6rem; margin-bottom: 1.4rem; }

.legal h2 {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.35rem;
  line-height: 1.3;
  margin-bottom: 0.9rem;
}

.legal p + p { margin-top: 1rem; }
.legal ul, .legal ol { padding-left: 1.3rem; margin: 1rem 0; }
.legal li + li { margin-top: 0.5rem; }
.legal main, main.legal { padding-bottom: 3.5rem; }

/* Generic content fallbacks */
main p + p { margin-top: 1rem; }
main ul:not(.ledger):not(.plain), main ol { padding-left: 1.3rem; margin: 1rem 0; }
main ul:not(.ledger):not(.plain) li + li, main ol li + li { margin-top: 0.5rem; }

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

.site-footer {
  border-top: 3px solid var(--rule-strong);
  margin-top: 2rem;
  padding: 2.4rem 0 2.6rem;
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.footer-cols { display: flex; flex-wrap: wrap; gap: 2rem 5rem; margin-bottom: 2rem; }

.footer-cols nav { display: flex; flex-direction: column; gap: 0.45rem; }

.col-label {
  font-family: var(--display);
  font-weight: 700;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink);
  margin-bottom: 0.3rem;
}

.site-footer a { color: var(--ink); }
.site-footer a:hover { color: var(--accent-text); }

.colophon { border-top: 1px solid var(--rule); padding-top: 1.2rem; line-height: 1.7; }