:root {
  color-scheme: light;
  --bg: #f4f6f5;
  --paper: #ffffff;
  --ink: #171717;
  --muted: #5c6067;
  --line: #ccd3d1;
  --accent: #0e5f6f;
  --accent-2: #8f3d27;
  --accent-3: #2f6f3e;
  --shadow: 0 18px 60px rgba(31, 36, 42, 0.12);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    linear-gradient(90deg, rgba(14, 95, 111, 0.055) 1px, transparent 1px) 0 0 / 44px 44px,
    linear-gradient(180deg, rgba(23, 23, 23, 0.035) 1px, transparent 1px) 0 0 / 44px 44px,
    var(--bg);
  color: var(--ink);
  line-height: 1.55;
}

a {
  color: inherit;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 10;
  background: var(--ink);
  color: white;
  padding: 0.75rem 1rem;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  background: rgba(244, 246, 245, 0.9);
  border-bottom: 1px solid rgba(23, 23, 23, 0.08);
  backdrop-filter: blur(18px);
}

.nav {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand,
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.brand {
  text-decoration: none;
  font-weight: 780;
}

.brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border: 1px solid var(--ink);
  background: var(--paper);
  font-size: 0.78rem;
  letter-spacing: 0;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.94rem;
  text-decoration: none;
}

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

.hero,
.section,
.contact,
.footer {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.hero {
  min-height: calc(100vh - 72px);
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(300px, 0.72fr);
  align-items: center;
  gap: clamp(2rem, 6vw, 5rem);
  padding: clamp(3rem, 6vw, 5rem) 0 3rem;
}

.eyebrow {
  margin: 0 0 0.8rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  font-size: clamp(2.7rem, 5.4vw, 5.25rem);
  line-height: 0.98;
  letter-spacing: 0;
  max-width: 13.5ch;
}

h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 4rem);
  line-height: 1;
  letter-spacing: 0;
}

h3 {
  margin: 0;
  font-size: 1.06rem;
  line-height: 1.25;
}

.hero-body {
  max-width: 760px;
  margin: 1.3rem 0 0;
  color: #34363a;
  font-size: clamp(1.05rem, 1.55vw, 1.2rem);
}

.actions,
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.72rem 1rem;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  text-decoration: none;
  font-weight: 760;
}

.button.primary {
  background: var(--ink);
  color: var(--paper);
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(23, 23, 23, 0.12);
}

.signal-panel {
  background: var(--paper);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  padding: clamp(1rem, 3vw, 1.6rem);
}

.signal-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.55rem;
  aspect-ratio: 1.15;
}

.signal-grid span {
  min-height: 54px;
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(14, 95, 111, 0.15), transparent),
    var(--bg);
}

.signal-grid span:nth-child(3n) {
  background:
    linear-gradient(135deg, rgba(143, 61, 39, 0.16), transparent),
    var(--bg);
}

.signal-grid span:nth-child(4n) {
  background:
    linear-gradient(135deg, rgba(47, 111, 62, 0.16), transparent),
    var(--bg);
}

.hero-stats {
  margin: 1.4rem 0 0;
  display: grid;
  gap: 0.8rem;
}

.stat {
  display: grid;
  grid-template-columns: 72px 1fr;
  align-items: baseline;
  gap: 1rem;
  border-top: 1px solid var(--line);
  padding-top: 0.8rem;
}

.stat dt {
  font-size: 2rem;
  line-height: 1;
  font-weight: 850;
}

.stat dd {
  margin: 0;
  color: var(--muted);
}

.section {
  padding: clamp(4rem, 7vw, 7rem) 0;
}

.band {
  width: 100%;
  max-width: none;
  padding-left: max(16px, calc((100vw - 1180px) / 2));
  padding-right: max(16px, calc((100vw - 1180px) / 2));
  background: rgba(255, 253, 248, 0.68);
  border-block: 1px solid rgba(23, 23, 23, 0.08);
}

.section-heading {
  max-width: 720px;
  margin-bottom: 2rem;
}

.section-heading.wide {
  max-width: 920px;
}

.section-heading p:not(.eyebrow) {
  color: var(--muted);
  font-size: 1.05rem;
}

.feature-grid,
.cluster-grid,
.link-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.cluster-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.feature,
.cluster,
.public-link {
  border: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.82);
  padding: 1.25rem;
}

.feature p,
.cluster p,
.public-link p,
.timeline-card p {
  color: var(--muted);
}

.timeline {
  display: grid;
  gap: 1rem;
}

.timeline-card {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  gap: 2rem;
  border-top: 1px solid var(--line);
  padding: 1.35rem 0;
}

.timeline-label {
  color: var(--accent-2);
  font-weight: 800;
  text-transform: uppercase;
  font-size: 0.78rem;
}

.timeline-card .meta {
  color: var(--muted);
  margin: 0.3rem 0 0.75rem;
}

.repo-list,
.range-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 1rem;
}

.tag,
.range-list span {
  border: 1px solid var(--line);
  background: var(--paper);
  padding: 0.5rem 0.65rem;
  color: #383a3e;
  font-size: 0.9rem;
}

.split {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 2rem;
}

.range-list {
  align-content: start;
  margin-top: 0.3rem;
}

.public-link {
  text-decoration: none;
}

.public-link:hover,
.public-link:focus-visible {
  border-color: var(--ink);
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 2rem;
  padding: clamp(4rem, 7vw, 6rem) 0;
  border-top: 1px solid var(--line);
}

.contact h2 {
  max-width: 760px;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem 0 2.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 860px) {
  .nav {
    min-height: auto;
    padding: 0.8rem 0;
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 0.2rem;
  }

  .hero,
  .split,
  .contact {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  h1 {
    max-width: 13ch;
  }

  .feature-grid,
  .cluster-grid,
  .link-grid {
    grid-template-columns: 1fr;
  }

  .timeline-card {
    grid-template-columns: 1fr;
    gap: 0.4rem;
  }

  .contact-actions {
    margin-top: 0;
  }

  .footer {
    flex-direction: column;
  }
}