/* HerbaGraph landing | Observatory / Laboratory / Atlas environments */

@font-face {
  font-family: "Geist";
  src: url("https://cdn.jsdelivr.net/npm/geist@1.3.1/dist/fonts/geist-sans/Geist-Variable.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

:root {
  --bg-primary: #f7f7f3;
  --bg-dark: #0c0d0f;
  --bg-atlas: #eef1ed;
  --surface: #ffffff;

  --text-primary: #171918;
  --text-secondary: #5d635f;
  --text-dark-primary: #f4f5f2;
  --text-dark-secondary: #a8ada8;
  --text-dark-muted: #6f756f;

  --accent-intelligence: #7c8cf8;
  --accent-biological: #75a78c;
  --accent-glow: rgba(124, 140, 248, 0.18);

  --border-subtle: rgba(20, 24, 21, 0.08);
  --border-dark: rgba(255, 255, 255, 0.06);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --font-sans: "Geist", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, monospace;
  --font-serif: "Instrument Serif", Georgia, serif;
}

.landing-page {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--text-primary);
  background: var(--bg-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.landing-page * { box-sizing: border-box; }

.landing-page a:not(.landing-btn) { color: inherit; text-decoration: none; }
.landing-page a:not(.landing-btn):hover { text-decoration: none; }

/* ── Navigation ── */
.landing-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
  transition: background 0.32s var(--ease-out), border-color 0.32s var(--ease-out), backdrop-filter 0.32s var(--ease-out);
  background: rgba(12, 13, 15, 0.72);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-dark);
}

.landing-nav.is-scrolled {
  backdrop-filter: blur(18px);
  background: rgba(12, 13, 15, 0.9);
}

.landing-nav .logo { color: var(--text-dark-primary); }
.landing-nav .logo-tag { color: var(--text-dark-muted); }

.landing-nav-links {
  display: flex;
  gap: 1.75rem;
  align-items: center;
}

.landing-nav-links a {
  font-size: 0.88rem;
  color: var(--text-dark-secondary);
  transition: color 0.2s ease;
}

.landing-nav-links a:hover { color: var(--text-dark-primary); }

.landing-nav-actions {
  display: flex;
  gap: 0.65rem;
  align-items: center;
}

.landing-btn {
  font: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 0.7rem 1.1rem;
  border-radius: 10px;
  border: 1px solid transparent;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  transition: transform 0.18s var(--ease-out), background 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.landing-btn:hover {
  transform: translateY(-1px);
  text-decoration: none;
}

.landing-page a.landing-btn-ghost,
.landing-btn-ghost {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.38);
  color: #f4f5f2;
}

.landing-page a.landing-btn-ghost:hover,
.landing-btn-ghost:hover {
  border-color: rgba(255, 255, 255, 0.55);
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}

.landing-page a.landing-btn-primary,
.landing-btn-primary {
  background: #f4f5f2;
  color: #111311;
  border-color: #e8e9e4;
}

.landing-page a.landing-btn-primary:hover,
.landing-btn-primary:hover {
  background: #fff;
  border-color: #fff;
  color: #111311;
}

.landing-page a.landing-btn-secondary,
.landing-btn-secondary {
  background: var(--surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
}

.landing-page a.landing-btn-secondary:hover,
.landing-btn-secondary:hover {
  border-color: rgba(20, 24, 21, 0.18);
  color: var(--text-primary);
}

.landing-page a.landing-btn-dark-primary,
.landing-btn-dark-primary {
  background: #f4f5f2;
  color: #111311;
  border-color: #e8e9e4;
}

/* ── Observatory (dark) ── */
.env-observatory {
  background:
    radial-gradient(circle at 70% 40%, rgba(124, 140, 248, 0.08), transparent 40%),
    var(--bg-dark);
  color: var(--text-dark-primary);
}

/* ── Laboratory (light) ── */
.env-laboratory {
  background: var(--bg-primary);
  color: var(--text-primary);
}

/* ── Atlas (grid) ── */
.env-atlas {
  background-color: var(--bg-atlas);
  background-image:
    linear-gradient(rgba(24, 30, 26, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(24, 30, 26, 0.035) 1px, transparent 1px);
  background-size: 40px 40px;
  color: var(--text-primary);
}

/* ── Hero ── */
.landing-hero {
  display: grid;
  grid-template-columns: 0.45fr 0.55fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
  min-height: 100vh;
  padding: calc(76px + 3rem) clamp(1.5rem, 5vw, 4rem) 4rem;
  max-width: 1600px;
  margin: 0 auto;
}

.hero-eyebrow {
  margin: 0 0 1.25rem;
  color: var(--text-dark-muted);
}

.hero-copy h1 {
  margin: 0;
  font-size: clamp(2.4rem, 5.5vw, 5.75rem);
  line-height: 0.98;
  letter-spacing: -0.045em;
  font-weight: 500;
}

.hero-copy h1 .accent { color: var(--accent-intelligence); }

.hero-lede {
  margin: 1.75rem 0 2rem;
  max-width: 38ch;
  font-size: 1.125rem;
  line-height: 1.55;
  color: var(--text-dark-secondary);
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.hero-graph-wrap {
  position: relative;
  min-height: 420px;
}

.hero-graph-svg {
  width: 100%;
  height: auto;
  display: block;
}

.hero-graph-line {
  fill: none;
  stroke: rgba(255, 255, 255, 0.12);
  stroke-width: 1;
}

.hero-graph-line.active {
  stroke: var(--accent-intelligence);
  stroke-width: 1.5;
  filter: drop-shadow(0 0 8px rgba(124, 140, 248, 0.5));
  stroke-dasharray: 8 14;
  animation: pathFlow 8s linear infinite;
}

@keyframes pathFlow {
  to { stroke-dashoffset: -220; }
}

.graph-node-label {
  font-family: var(--font-sans);
  font-size: 10px;
  fill: var(--text-dark-secondary);
  letter-spacing: 0.02em;
}

.graph-node-biomarker {
  fill: rgba(124, 140, 248, 0.12);
  stroke: rgba(124, 140, 248, 0.45);
  stroke-width: 1;
}

.graph-node-system {
  fill: rgba(117, 167, 140, 0.14);
  stroke: rgba(117, 167, 140, 0.5);
  stroke-width: 1;
}

.graph-node-pathway {
  fill: rgba(255, 255, 255, 0.04);
  stroke: rgba(255, 255, 255, 0.2);
  stroke-width: 1;
}

.graph-node-intervention {
  fill: rgba(124, 140, 248, 0.08);
  stroke: rgba(124, 140, 248, 0.35);
  stroke-width: 1;
}

.graph-node-evidence {
  fill: transparent;
  stroke: rgba(255, 255, 255, 0.25);
  stroke-width: 1;
}

.graph-node-safety {
  fill: rgba(255, 255, 255, 0.03);
  stroke: rgba(255, 255, 255, 0.3);
  stroke-width: 1.5;
}

.hero-meta {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dark-muted);
  line-height: 1.6;
}

.hero-meta-tl { top: 0; left: 0; }
.hero-meta-br { bottom: 0; right: 0; text-align: right; }

.hero-meta strong {
  display: block;
  color: var(--text-dark-secondary);
  font-weight: 500;
  margin-bottom: 0.15rem;
}

/* ── Proof strip ── */
.proof-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--border-dark);
  border-bottom: 1px solid var(--border-dark);
  background: var(--bg-dark);
}

.proof-item {
  padding: 1.75rem 1.5rem;
  text-align: center;
  border-right: 1px solid var(--border-dark);
}

.proof-item:last-child { border-right: none; }

.proof-num {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 500;
  letter-spacing: -0.03em;
  color: var(--text-dark-primary);
  line-height: 1;
  margin-bottom: 0.35rem;
}

.proof-label {
  font-size: 0.8rem;
  color: var(--text-dark-muted);
  letter-spacing: 0.02em;
}

/* ── Section utilities ── */
.landing-section {
  padding: clamp(4rem, 10vw, 7rem) clamp(1.5rem, 5vw, 4rem);
}

.landing-section-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.landing-section-wide {
  max-width: 1400px;
  margin: 0 auto;
}

.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.env-observatory .section-eyebrow,
.env-dark .section-eyebrow { color: var(--text-dark-muted); }

.section-title {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 4vw, 3.25rem);
  line-height: 1.05;
  letter-spacing: -0.035em;
  font-weight: 500;
}

.section-lede {
  margin: 0;
  max-width: 52ch;
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.env-observatory .section-lede,
.env-dark .section-lede { color: var(--text-dark-secondary); }

.editorial-statement {
  padding-block: clamp(7rem, 18vh, 15rem);
  text-align: center;
}

.editorial-statement p {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(2.25rem, 5vw, 4rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  max-width: 18ch;
  margin-inline: auto;
}

.editorial-statement p + p {
  margin-top: 1.5rem;
  color: var(--text-secondary);
}

.editorial-with-artifact {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: clamp(14rem, 32vh, 22rem);
  padding-inline: clamp(1.5rem, 6vw, 5rem);
  overflow: hidden;
}

.editorial-copy {
  position: relative;
  z-index: 1;
}

.bio-artifact {
  position: absolute;
  object-fit: cover;
  border-radius: 4px;
  opacity: 0.72;
  filter: saturate(0.82) contrast(1.04);
  pointer-events: none;
  user-select: none;
}

.bio-artifact-microscopy {
  top: 12%;
  right: clamp(4%, 12vw, 18%);
  width: clamp(88px, 11vw, 140px);
  height: clamp(88px, 11vw, 140px);
  object-position: 28% 42%;
  transform: rotate(4deg);
  box-shadow: 0 12px 40px rgba(12, 15, 13, 0.12);
}

.bio-artifact-diagram {
  bottom: -18%;
  left: -4%;
  width: clamp(120px, 16vw, 180px);
  height: clamp(120px, 16vw, 180px);
  object-position: 62% 38%;
  opacity: 0.55;
}

.bio-artifact-research {
  position: absolute;
  right: -2%;
  bottom: 8%;
  width: clamp(72px, 9vw, 120px);
  height: clamp(72px, 9vw, 120px);
  object-position: 78% 22%;
  opacity: 0.48;
  border-radius: 2px;
}

.editorial-artifact-edge .editorial-copy {
  margin-left: clamp(0rem, 8vw, 6rem);
}

/* ── Biomarker journey ── */
.biomarker-journey {
  position: relative;
  min-height: 140vh;
  padding-top: 2rem;
}

.journey-sticky {
  position: sticky;
  top: 96px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.journey-value-block {
  text-align: left;
}

.journey-value {
  font-size: clamp(5rem, 18vw, 11rem);
  font-weight: 500;
  letter-spacing: -0.05em;
  line-height: 0.9;
  color: var(--text-primary);
  transition: transform 0.6s var(--ease-out), opacity 0.6s var(--ease-out);
}

.journey-unit {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-top: 0.5rem;
}

.journey-stages {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  padding-top: 1rem;
}

.journey-stage {
  opacity: 0.2;
  transform: translateY(12px);
  transition: opacity 0.5s var(--ease-out), transform 0.5s var(--ease-out);
  padding: 1rem 1.25rem;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.journey-stage.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.journey-stage-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-intelligence);
  margin-bottom: 0.35rem;
}

.journey-stage h3 {
  margin: 0 0 0.25rem;
  font-size: 1rem;
  font-weight: 500;
}

.journey-stage p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.journey-mini-graph {
  margin-top: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.journey-mini-graph .arrow { color: var(--accent-intelligence); }

/* ── Product demo ── */
.product-demo-header {
  margin-bottom: 2.5rem;
}

.product-demo-media {
  margin-bottom: 0;
}

.product-frame {
  width: 100%;
  margin: 0;
  border: 1px solid rgba(20, 24, 21, 0.1);
  border-radius: var(--radius-lg);
  box-shadow: 0 30px 80px rgba(12, 15, 13, 0.08);
  background: var(--surface);
  overflow: hidden;
}

.product-frame-bar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
  background: #fafaf8;
}

.product-frame-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border-subtle);
}

.product-frame-url {
  margin-left: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-secondary);
}

.product-frame-body {
  padding: 1.5rem;
  min-height: 380px;
  position: relative;
}

.product-frame-embed {
  padding: 0;
  min-height: clamp(520px, 72vh, 860px);
  background: #f0f0f2;
}

.product-live-iframe {
  display: block;
  width: 100%;
  height: clamp(520px, 72vh, 860px);
  border: 0;
  background: #f5f5f7;
}

.product-callouts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.product-callout {
  padding: 1.25rem 0 0 1.5rem;
  border-left: 1px solid var(--accent-intelligence);
}

.product-callout h4 {
  margin: 0 0 0.35rem;
  font-size: 0.88rem;
  font-weight: 500;
}

.product-callout p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* ── Traditional vs HerbaGraph ── */
.transform-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 2.5rem;
}

.transform-panel {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  background: var(--surface);
}

.transform-panel h3 {
  margin: 0 0 1.25rem;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.transform-panel.hg {
  border-color: rgba(124, 140, 248, 0.2);
  background: rgba(124, 140, 248, 0.035);
  position: relative;
}

.transform-panel.hg::before {
  content: "";
  position: absolute;
  top: 0;
  left: 1.75rem;
  right: 1.75rem;
  height: 2px;
  background: var(--accent-intelligence);
  border-radius: 2px;
}

.transform-lines {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 2;
  color: var(--text-primary);
}

.transform-lines .status-high { color: #b45309; }
.transform-lines .status-low { color: var(--accent-intelligence); }
.transform-lines .status-normal { color: var(--text-secondary); }
.transform-lines .link-line { color: var(--accent-intelligence); }

/* ── Comparison table ── */
.compare-table-wrap {
  margin-top: 3rem;
  overflow-x: auto;
}

.compare-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 0.92rem;
}

.compare-table th,
.compare-table td {
  padding: 1rem 1.25rem;
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
}

.compare-table th {
  font-weight: 500;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.compare-table td:first-child {
  color: var(--text-secondary);
  font-size: 0.88rem;
}

.compare-table .col-hg {
  background: rgba(124, 140, 248, 0.035);
  position: relative;
}

.compare-table thead .col-hg::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-intelligence);
}

/* ── Atmospheric biology band ── */
.biology-atmosphere-band {
  position: relative;
  width: 100%;
  min-height: clamp(220px, 38vh, 420px);
  overflow: hidden;
  background: #0c0d0f;
}

.biology-atmosphere-img {
  width: 100%;
  height: clamp(220px, 38vh, 420px);
  object-fit: cover;
  object-position: center 42%;
  display: block;
  opacity: 0.88;
}

.biology-atmosphere-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  background: linear-gradient(
    180deg,
    rgba(12, 13, 15, 0.35) 0%,
    rgba(12, 13, 15, 0.55) 50%,
    rgba(12, 13, 15, 0.4) 100%
  );
}

.biology-atmosphere-overlay p {
  margin: 0;
  max-width: 22ch;
  text-align: center;
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 4vw, 3rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: #f4f5f2;
}

/* ── Atlas plate atmospheres ── */
.atlas-plate-section,
.methodology-atlas-section {
  position: relative;
  overflow: hidden;
}

.atlas-plate-bg,
.methodology-atlas-bg {
  position: absolute;
  inset: -8% -4%;
  pointer-events: none;
  z-index: 0;
}

.atlas-plate-bg img,
.methodology-atlas-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0.14;
  filter: saturate(0.75);
}

.methodology-atlas-bg img {
  opacity: 0.1;
  object-position: 72% 28%;
}

.atlas-plate-content,
.methodology-atlas-content {
  position: relative;
  z-index: 1;
}

/* ── Knowledge graph section ── */
.knowledge-graph-wrap {
  margin-top: 2.5rem;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(6px);
  padding: 2rem;
  overflow: hidden;
}

.knowledge-graph-svg {
  width: 100%;
  height: auto;
  display: block;
}

/* ── Pipeline diagram ── */
.pipeline-diagram {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.5rem 0.25rem;
  margin-top: 2.5rem;
}

.pipeline-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  opacity: 0.35;
  transition: opacity 0.4s var(--ease-out);
}

.pipeline-step.is-active { opacity: 1; }

.pipeline-node {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.55rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: var(--surface);
}

.pipeline-step.is-active .pipeline-node {
  border-color: var(--accent-intelligence);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.pipeline-step span {
  font-size: 0.72rem;
  color: var(--text-secondary);
}

.pipeline-arrow {
  color: var(--text-secondary);
  font-size: 0.85rem;
  opacity: 0.4;
}

/* ── Evidence composition ── */
.evidence-section .landing-section-inner {
  position: relative;
}

.evidence-composition {
  display: grid;
  grid-template-columns: minmax(260px, 340px) 1fr;
  gap: 1.75rem;
  margin-top: 2.5rem;
  align-items: start;
}

.evidence-doc-stack {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.pubmed-card {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: #fafaf8;
  padding: 1.1rem 1.15rem;
  font-size: 0.88rem;
  box-shadow: 0 8px 28px rgba(12, 15, 13, 0.05);
}

.pubmed-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.65rem;
}

.pubmed-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #1a4fd6;
  font-weight: 500;
}

.pubmed-type {
  font-size: 0.72rem;
  color: var(--text-secondary);
}

.pubmed-title {
  margin: 0 0 0.35rem;
  font-size: 0.95rem;
  font-weight: 500;
  line-height: 1.35;
}

.pubmed-meta {
  margin: 0 0 0.75rem;
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.pubmed-ids {
  margin: 0 0 0.75rem;
  display: grid;
  gap: 0.35rem;
}

.pubmed-ids div {
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.pubmed-ids dt {
  color: var(--text-secondary);
  margin: 0;
}

.pubmed-ids dd {
  margin: 0;
}

.pubmed-ids a {
  color: #1a4fd6;
  text-decoration: none;
}

.pubmed-ids a:hover {
  text-decoration: underline;
}

.pubmed-abstract {
  margin: 0;
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
  border-top: 1px solid var(--border-subtle);
  padding-top: 0.65rem;
}

.evidence-link-diagram {
  position: relative;
  min-height: 140px;
  border: 1px dashed var(--border-subtle);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.6);
  padding: 1rem;
}

.evidence-node {
  position: absolute;
  font-size: 0.72rem;
  padding: 0.45rem 0.6rem;
  border-radius: 8px;
  border: 1px solid var(--border-subtle);
  background: var(--surface);
  line-height: 1.35;
  max-width: 9rem;
}

.evidence-node-mechanistic {
  top: 1rem;
  left: 0.75rem;
}

.evidence-node-trial {
  top: 0.5rem;
  right: 0.75rem;
}

.evidence-node-profile {
  bottom: 0.75rem;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  border-color: rgba(124, 140, 248, 0.35);
  background: rgba(124, 140, 248, 0.06);
}

.evidence-node-profile strong {
  display: block;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: var(--accent-intelligence);
  margin-top: 0.15rem;
}

.evidence-link-diagram::before,
.evidence-link-diagram::after {
  content: "";
  position: absolute;
  background: var(--border-subtle);
  z-index: 0;
}

.evidence-link-diagram::before {
  top: 2.1rem;
  left: 5.5rem;
  right: 5.5rem;
  height: 1px;
}

.evidence-link-diagram::after {
  top: 2.1rem;
  bottom: 3.2rem;
  left: 50%;
  width: 1px;
  transform: translateX(-50%);
}

/* ── Evidence cards ── */
.evidence-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

.evidence-card {
  border-radius: 14px;
  border: 1px solid var(--border-subtle);
  padding: 1.5rem;
  background: var(--surface);
}

.evidence-card h3 {
  margin: 0 0 0.25rem;
  font-size: 1.1rem;
  font-weight: 500;
}

.evidence-card .pathway {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.confidence-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  margin-bottom: 0.45rem;
}

.confidence-bar {
  display: flex;
  gap: 2px;
  margin-top: 0.25rem;
}

.confidence-seg {
  flex: 1;
  height: 4px;
  border-radius: 2px;
  background: var(--border-subtle);
}

.confidence-seg.filled { background: var(--accent-intelligence); }

.evidence-sources {
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-secondary);
}

/* ── Final CTA ── */
.final-cta {
  position: relative;
  overflow: hidden;
  text-align: center;
  padding: clamp(5rem, 12vw, 8rem) 1.5rem;
}

.final-cta-bg {
  position: absolute;
  inset: 0;
  opacity: 0.35;
  pointer-events: none;
}

.final-cta-content {
  position: relative;
  max-width: 640px;
  margin: 0 auto;
}

.final-cta h2 {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 4.5vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
  font-weight: 500;
}

.final-cta p {
  margin: 0 0 2rem;
  font-size: 1.125rem;
  color: var(--text-dark-secondary);
}

.final-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

.landing-disclaimer {
  max-width: 720px;
  margin: 0 auto;
  padding: 1.25rem 1.5rem;
  font-size: 0.82rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--border-subtle);
}

.landing-footer {
  text-align: center;
  padding: 1.5rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--border-subtle);
}

/* ── Reveal animations ── */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .landing-hero { grid-template-columns: 1fr; min-height: auto; }
  .hero-graph-wrap { min-height: 320px; }
  .journey-sticky { grid-template-columns: 1fr; position: relative; top: 0; }
  .biomarker-journey { min-height: auto; }
  .transform-grid { grid-template-columns: 1fr; }
  .product-callouts { grid-template-columns: 1fr; }
  .evidence-composition { grid-template-columns: 1fr; }
  .bio-artifact-microscopy { right: 4%; top: 6%; opacity: 0.5; }
}

@media (max-width: 768px) {
  .landing-nav-links { display: none; }
  .proof-strip { grid-template-columns: repeat(2, 1fr); }
  .proof-item:nth-child(2) { border-right: none; }
  .proof-item:nth-child(1),
  .proof-item:nth-child(2) { border-bottom: 1px solid var(--border-dark); }
  .product-frame-embed,
  .product-live-iframe {
    min-height: 420px;
    height: 65vh;
  }
  .editorial-with-artifact { flex-direction: column; padding-top: 5rem; }
  .editorial-artifact-edge .editorial-copy { margin-left: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .hero-graph-line.active { animation: none; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .journey-stage { opacity: 1; transform: none; }
}