/* ============================================================
   GROUNDTRUTH — design tokens
   Palette drawn from a soil horizon: topsoil gold, subsoil rust,
   bedrock green, and a "verification ink" blue used only for
   citation marks and stamps.
   ============================================================ */

:root {
  --bg: #EEF0E6;
  --bg-alt: #E3E6D5;
  --card: #FBF9F3;
  --ink: #211D16;
  --ink-soft: #56503F;
  --line: #C9C2AC;

  --gold: #B9862E;
  --gold-dark: #8F6520;
  --green: #2F5233;
  --green-soft: #3F6B45;
  --green-deep: #1B2E1E;
  --stamp: #1C6E8C;
  --stamp-deep: #124A5C;

  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;

  --radius-sm: 4px;
  --radius-md: 10px;
  --container: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; }

.wrap {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.12;
  margin: 0 0 0.5em;
  color: var(--ink);
}

h1 { font-size: clamp(2.4rem, 5vw, 3.6rem); font-weight: 500; letter-spacing: -0.01em; }
h2 { font-size: clamp(1.7rem, 3.2vw, 2.3rem); }
h3 { font-size: 1.25rem; }

p { margin: 0 0 1em; color: var(--ink-soft); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--stamp-deep);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}

.eyebrow::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--stamp);
  display: inline-block;
}

/* focus visibility */
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--stamp);
  outline-offset: 3px;
}

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

/* ============================================================
   HEADER / NAV
   ============================================================ */

header.site {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(238, 240, 230, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 32px;
  max-width: var(--container);
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--ink);
}

.brand-mark {
  width: 30px;
  height: 30px;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 34px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.94rem;
  font-weight: 500;
}

.nav-links a {
  text-decoration: none;
  color: var(--ink-soft);
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

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

.nav-links a.active {
  color: var(--ink);
  border-bottom-color: var(--gold);
}


.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  cursor: pointer;
}

@media (max-width: 780px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 8px 32px 18px;
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links li { width: 100%; }
  .nav-links a { display: block; padding: 12px 0; }
}

/* ============================================================
   BUTTONS
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 13px 24px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.12s ease, background 0.15s ease, border-color 0.15s ease;
}

.btn-primary {
  background: var(--green-deep);
  color: #F4F2E9;
}
.btn-primary:hover { background: var(--green-soft); transform: translateY(-1px); }

.btn-ghost {
  background: transparent;
  border-color: var(--ink);
  color: var(--ink);
}
.btn-ghost:hover { border-color: var(--gold-dark); color: var(--gold-dark); }

.btn-row { display: flex; gap: 16px; flex-wrap: wrap; }

/* ============================================================
   HERO
   ============================================================ */

.hero {
  padding: 84px 0 60px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}

.hero-copy p.lede {
  font-size: 1.14rem;
  max-width: 46ch;
}

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
}

/* --- demo card: the signature element --- */

.demo-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: 0 30px 60px -30px rgba(33, 29, 22, 0.35);
  overflow: hidden;
}

.demo-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.dots { display: flex; gap: 6px; }
.dots span {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--line);
}

.demo-query {
  padding: 20px 22px 4px;
  font-family: var(--font-mono);
  font-size: 0.86rem;
}
.demo-query .who {
  color: var(--stamp-deep);
  font-weight: 600;
}

.demo-answer {
  padding: 8px 22px 22px;
  font-size: 0.95rem;
  color: var(--ink);
}

.cite {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  vertical-align: super;
  color: #fff;
  background: var(--stamp);
  padding: 1px 5px;
  border-radius: 50px;
  margin-left: 2px;
}

.citation-sources {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 4px 0 14px;
}

.demo-sources {
  border-top: 1px dashed var(--line);
  padding: 14px 22px 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.source-chip {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  background: var(--bg-alt);
  border: 1px solid var(--line);
  padding: 5px 10px;
  border-radius: 50px;
  color: var(--ink-soft);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.chip-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--stamp);
  color: #fff;
  font-size: 0.6rem;
  flex-shrink: 0;
}

.stamp-badge {
  position: absolute;
  top: -18px;
  right: -18px;
  width: 118px;
  height: 118px;
  transform: rotate(9deg);
}

@media (max-width: 900px) {
  .stamp-badge { display: none; }
}

/* ============================================================
   SOIL DIVIDER — the recurring strata motif between sections
   ============================================================ */

.strata {
  height: 10px;
  display: flex;
}
.strata span { flex: 1; }
.strata .s1 { background: var(--gold); }
.strata .s2 { background: var(--gold-dark); }
.strata .s3 { background: var(--green-soft); }
.strata .s4 { background: var(--green-deep); }

/* ============================================================
   SECTIONS
   ============================================================ */

section { padding: 76px 0; }
.section-alt { background: var(--bg-alt); }
.section-dark {
  background: var(--green-deep);
  color: #EDE9DA;
}
.section-dark h2, .section-dark h3, .section-dark p { color: #EDE9DA; }
.section-dark .ink-soft-dark { color: #C7CFC3; }

.section-head {
  max-width: 640px;
  margin-bottom: 48px;
}

/* --- problem statement / contrast --- */

.contrast-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

@media (max-width: 780px) {
  .contrast-grid { grid-template-columns: 1fr; }
}

.contrast-card {
  border-radius: var(--radius-md);
  padding: 28px;
  border: 1px solid var(--line);
}

.contrast-card.bad {
  background: var(--card);
  opacity: 0.85;
}

.contrast-card.good {
  background: var(--card);
  border-color: var(--stamp);
  box-shadow: 0 0 0 1px var(--stamp);
}

.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 50px;
  margin-bottom: 14px;
}
.tag.bad { background: #E4DCC8; color: #6B5C3C; }
.tag.good { background: var(--stamp); color: #fff; }

/* --- pipeline / how it works --- */

.pipeline {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  counter-reset: step;
}

@media (max-width: 860px) {
  .pipeline { grid-template-columns: 1fr; }
}

.pipeline-step {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 26px;
  position: relative;
}

.pipeline-step .layer-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--stamp-deep);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 10px;
  display: block;
}

.pipeline-arrow {
  display: none;
}
@media (min-width: 861px) {
  .pipeline { position: relative; }
}

/* --- feature grid --- */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

@media (max-width: 860px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .feature-grid { grid-template-columns: 1fr; }
}

.feature {
  background: var(--card);
  padding: 28px 24px;
}

.feature h3 { margin-bottom: 8px; font-size: 1.08rem; }
.feature p { margin: 0; font-size: 0.93rem; }

/* --- case study teaser cards --- */

.case-teaser-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}
@media (max-width: 780px) { .case-teaser-grid { grid-template-columns: 1fr; } }

.teaser-grid-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 900px) { .teaser-grid-3 { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .teaser-grid-3 { grid-template-columns: 1fr; } }

.case-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 30px;
  text-decoration: none;
  display: block;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.case-card:hover { border-color: var(--gold); transform: translateY(-2px); }

.case-card .company {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--stamp-deep);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
  display: block;
}

.case-card .metric {
  font-family: var(--font-display);
  font-size: 2.1rem;
  color: var(--gold-dark);
  margin: 12px 0 4px;
}

.read-more {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink);
  margin-top: 14px;
  display: inline-block;
}

/* --- CTA band --- */

.cta-band {
  background: var(--green-deep);
  color: #EDE9DA;
  border-radius: var(--radius-md);
  padding: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.cta-band h2 { color: #F4F2E9; margin-bottom: 6px; }
.cta-band p { color: #C7CFC3; margin: 0; }

/* ============================================================
   CASE STUDIES PAGE
   ============================================================ */

.page-hero {
  padding: 64px 0 20px;
}
.page-hero p.lede { max-width: 60ch; font-size: 1.08rem; }

.case-study {
  padding: 64px 0;
  border-bottom: 1px solid var(--line);
}
.case-study:last-of-type { border-bottom: none; }

.case-head {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  margin-bottom: 40px;
  align-items: end;
}
@media (max-width: 860px) { .case-head { grid-template-columns: 1fr; } }

.case-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 20px;
}
.case-stats div { text-align: center; }
.case-stats .num {
  font-family: var(--font-display);
  font-size: 1.7rem;
  color: var(--gold-dark);
  display: block;
}
.case-stats .lbl {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

.case-body {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
@media (max-width: 860px) { .case-body { grid-template-columns: 1fr; } }

.case-body .col span.k {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--stamp-deep);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 10px;
}

blockquote.pull {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.3rem;
  line-height: 1.4;
  color: var(--ink);
  border-left: 3px solid var(--gold);
  padding-left: 24px;
  margin: 36px 0 0;
}
blockquote.pull cite {
  display: block;
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 0.75rem;
  color: var(--ink-soft);
  margin-top: 14px;
}

/* ============================================================
   ABOUT PAGE
   ============================================================ */

.about-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
  align-items: start;
}
@media (max-width: 860px) { .about-grid { grid-template-columns: 1fr; } }

.timeline {
  border-left: 2px solid var(--line);
  padding-left: 26px;
  display: flex;
  flex-direction: column;
  gap: 30px;
}
.timeline-item { position: relative; }
.timeline-item::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 4px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--stamp);
}
.timeline-item .yr {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--stamp-deep);
  letter-spacing: 0.06em;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 20px;
}
@media (max-width: 560px) { .values-grid { grid-template-columns: 1fr; } }
.value-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 22px;
  background: var(--card);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
@media (max-width: 700px) { .team-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 460px) { .team-grid { grid-template-columns: 1fr; } }

.team-card { text-align: left; }
.team-avatar {
  width: 100%;
  aspect-ratio: 1;
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  display: block;
  object-fit: cover;
}
.team-card h3 { margin-bottom: 2px; font-size: 1rem; }
.team-card .role {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--stamp-deep);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 10px;
  display: block;
}

/* ============================================================
   CONTACT PAGE
   ============================================================ */

.contact-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 56px;
  align-items: start;
}
@media (max-width: 860px) { .contact-grid { grid-template-columns: 1fr; } }

.contact-form {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 32px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
@media (max-width: 560px) { .form-row { grid-template-columns: 1fr; } }

.form-field {
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
}

.form-field label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--stamp-deep);
  margin-bottom: 8px;
}

.form-field input,
.form-field textarea {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 11px 14px;
  resize: vertical;
}

.form-field input:focus,
.form-field textarea:focus {
  outline: 2px solid var(--stamp);
  outline-offset: 1px;
}

.form-note {
  margin: 18px 0 0;
  font-size: 0.88rem;
  color: var(--stamp-deep);
}

.contact-aside {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* ============================================================
   FOOTER
   ============================================================ */

footer.site {
  border-top: 1px solid var(--line);
  padding: 44px 0 30px;
  background: var(--bg-alt);
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1.15rem;
}

.footer-note {
  font-size: 0.85rem;
  color: var(--ink-soft);
  max-width: 40ch;
}

.footer-links {
  display: flex;
  gap: 28px;
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 0.88rem;
}
.footer-links a { text-decoration: none; color: var(--ink-soft); }
.footer-links a:hover { color: var(--ink); }

.footer-bottom {
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-soft);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}