:root {
  --bg: #0c1210;
  --bg-elevated: #121a17;
  --ink: #e7efea;
  --ink-muted: #9aada3;
  --ink-faint: #6a7d74;
  --accent: #3fbf9a;
  --accent-soft: rgba(63, 191, 154, 0.14);
  --line: rgba(231, 239, 234, 0.1);
  --line-strong: rgba(231, 239, 234, 0.18);
  --serif: "Instrument Serif", Georgia, serif;
  --sans: "Sora", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --max: 1120px;
  --pad: clamp(1.25rem, 4vw, 2.5rem);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--sans);
  font-weight: 400;
  line-height: 1.55;
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(63, 191, 154, 0.12), transparent 55%),
    radial-gradient(ellipse 60% 40% at 100% 30%, rgba(47, 110, 96, 0.18), transparent 50%),
    var(--bg);
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

em {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  color: var(--accent);
}

.noise {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 0;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

#graph-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.45;
}

.site-header,
main,
.site-footer {
  position: relative;
  z-index: 1;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.25rem var(--pad);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--serif);
  font-size: 1.35rem;
  letter-spacing: 0.01em;
}

.brand-mark {
  width: 0.85rem;
  height: 0.85rem;
  border: 1.5px solid var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 0 4px var(--accent-soft);
  flex-shrink: 0;
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.84rem;
  color: var(--ink-muted);
}

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

.nav-cta {
  padding: 0.45rem 0.85rem;
  border: 1px solid var(--line-strong);
  color: var(--ink) !important;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.nav-cta:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.menu-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
}

.menu-toggle span {
  display: block;
  width: 1.1rem;
  height: 1.5px;
  background: currentColor;
}

.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(4rem, 14vh, 7.5rem) var(--pad) clamp(5rem, 16vh, 8rem);
  min-height: calc(100vh - 5rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.eyebrow,
.section-label,
.stage-num,
.pillar-index {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.brand-hero {
  margin: 0.6rem 0 0.35rem;
  font-family: var(--serif);
  font-size: clamp(3.6rem, 12vw, 7.5rem);
  font-weight: 400;
  line-height: 0.92;
  letter-spacing: -0.02em;
  animation: rise 0.9s ease both;
}

.hero-line {
  margin: 0.4rem 0 1.25rem;
  font-family: var(--serif);
  font-size: clamp(1.6rem, 4vw, 2.55rem);
  font-weight: 400;
  line-height: 1.15;
  color: var(--ink-muted);
  max-width: 18ch;
  animation: rise 0.9s ease 0.1s both;
}

.hero-support {
  margin: 0;
  max-width: 38rem;
  color: var(--ink-muted);
  font-size: 1.02rem;
  font-weight: 300;
  animation: rise 0.9s ease 0.18s both;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
  animation: rise 0.9s ease 0.26s both;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.25rem;
  font-family: var(--sans);
  font-size: 0.9rem;
  font-weight: 500;
  border: 1px solid transparent;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease,
    color 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent);
  color: #062019;
}

.btn-primary:hover {
  background: #54d0ac;
}

.btn-ghost {
  border-color: var(--line-strong);
  color: var(--ink);
  background: transparent;
}

.btn-ghost:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.problem,
.pipeline,
.thesis,
.domains {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(4rem, 10vh, 6.5rem) var(--pad);
}

.section-label {
  margin-bottom: 1rem;
}

h2 {
  margin: 0 0 1.25rem;
  font-family: var(--serif);
  font-size: clamp(2.1rem, 5vw, 3.4rem);
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: -0.015em;
}

.lead {
  margin: 0 0 2.75rem;
  max-width: 40rem;
  color: var(--ink-muted);
  font-weight: 300;
  font-size: 1.05rem;
}

.pillar-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem 2rem;
  border-top: 1px solid var(--line);
  padding-top: 2rem;
}

.pillar {
  padding: 0.5rem 0 1rem;
  border-bottom: 1px solid var(--line);
}

.pillar h3,
.stage h3,
.thesis-grid h3 {
  margin: 0.55rem 0 0.65rem;
  font-family: var(--serif);
  font-size: 1.55rem;
  font-weight: 400;
}

.pillar p,
.stage p,
.thesis-grid p {
  margin: 0;
  color: var(--ink-muted);
  font-weight: 300;
  font-size: 0.95rem;
}

.pipeline-stages {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.25rem;
}

.stage {
  display: grid;
  grid-template-columns: minmax(10rem, 0.9fr) 1.4fr;
  gap: 1.5rem 2rem;
  padding: 1.75rem 0;
  border-top: 1px solid var(--line);
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s ease, border-color 0.3s ease;
}

.stage.is-visible {
  opacity: 1;
  transform: none;
}

.stage:last-child {
  border-bottom: 1px solid var(--line);
}

.stage:hover {
  border-color: var(--line-strong);
}

.stage-tags {
  grid-column: 2;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0.9rem 0 0;
  padding: 0;
  list-style: none;
}

.stage-tags li {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  color: var(--accent);
  padding: 0.28rem 0.55rem;
  background: var(--accent-soft);
  border: 1px solid rgba(63, 191, 154, 0.25);
}

.thesis blockquote {
  margin: 0 0 2.75rem;
  padding: 0;
  border: 0;
}

.thesis blockquote p {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(1.7rem, 4vw, 2.6rem);
  line-height: 1.2;
  max-width: 18ch;
}

.thesis-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.75rem;
  border-top: 1px solid var(--line);
  padding-top: 2rem;
}

.domains {
  padding-bottom: clamp(5rem, 12vh, 7rem);
}

.domains-inner {
  padding: clamp(2rem, 5vw, 3rem) 0 0;
  border-top: 1px solid var(--line);
}

.domain-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 0 0 2rem;
}

.domain-chips span {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--ink-muted);
  padding: 0.45rem 0.7rem;
  border: 1px solid var(--line-strong);
}

.site-footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2rem var(--pad) 3rem;
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  border-top: 1px solid var(--line);
  color: var(--ink-faint);
  font-size: 0.85rem;
}

.footer-brand {
  display: flex;
  gap: 0.85rem;
  align-items: flex-start;
}

.footer-brand strong {
  display: block;
  font-family: var(--serif);
  font-size: 1.15rem;
  color: var(--ink);
  font-weight: 400;
}

.footer-brand p,
.footer-meta p {
  margin: 0.2rem 0 0;
}

.footer-meta {
  text-align: right;
}

.footer-meta a:hover {
  color: var(--accent);
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 860px) {
  .nav {
    display: none;
    position: absolute;
    top: 4.25rem;
    right: var(--pad);
    left: var(--pad);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem;
    background: var(--bg-elevated);
    border: 1px solid var(--line-strong);
  }

  .nav.is-open {
    display: flex;
  }

  .nav a {
    padding: 0.85rem 0.9rem;
    border-bottom: 1px solid var(--line);
  }

  .nav a:last-child {
    border-bottom: 0;
  }

  .nav-cta {
    border: 0;
    margin-top: 0.25rem;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .pillar-grid,
  .thesis-grid {
    grid-template-columns: 1fr;
  }

  .stage {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .stage-tags {
    grid-column: 1;
  }

  .site-footer {
    flex-direction: column;
  }

  .footer-meta {
    text-align: left;
  }
}