:root {
  --ink: #0e1a1f;
  --ink-2: #13242b;
  --ink-line: rgba(232, 239, 236, 0.09);
  --on-ink: #e8efec;
  --on-ink-muted: #9fb3ad;
  --accent: #0d8a63;
  --accent-on-ink: #3ecf9a;
  --bg: #f6f7f5;
  --surface: #ffffff;
  --text: #15232a;
  --text-muted: #51646a;
  --line: #dfe5e2;
  --radius: 14px;
  --max: 1120px;
  --font: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --accent: #3ecf9a;
    --bg: #0b1418;
    --surface: #111e23;
    --text: #e3ebe8;
    --text-muted: #98aba5;
    --line: #213239;
    color-scheme: dark;
  }
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-underline-offset: 3px;
}

:focus-visible {
  outline: 2px solid var(--accent-on-ink);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -60px;
  padding: 8px 14px;
  background: var(--accent-on-ink);
  color: var(--ink);
  border-radius: 8px;
  z-index: 10;
}

.skip-link:focus {
  top: 12px;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

@media (max-width: 600px) {
  .wrap {
    padding: 0 16px;
  }
}

/* Dark band: header + hero */

.band {
  position: relative;
  background:
    radial-gradient(900px 480px at 85% -10%, rgba(62, 207, 154, 0.16), transparent 60%),
    radial-gradient(700px 420px at -10% 110%, rgba(62, 160, 207, 0.10), transparent 60%),
    var(--ink);
  color: var(--on-ink);
  overflow: hidden;
}

.band::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--ink-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--ink-line) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at 70% 30%, #000 10%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at 70% 30%, #000 10%, transparent 70%);
  pointer-events: none;
}

.band > * {
  position: relative;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding-top: 22px;
  padding-bottom: 22px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--on-ink);
  text-decoration: none;
}

.brand svg {
  width: 36px;
  height: 36px;
  flex: none;
}

.wordmark {
  display: flex;
  flex-direction: column;
  line-height: 1.05;
}

.wordmark-name {
  font-weight: 650;
  font-size: 19px;
  letter-spacing: -0.01em;
}

.wordmark-name span {
  color: var(--accent-on-ink);
}

.wordmark-sub {
  font-size: 10.5px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--on-ink-muted);
  margin-top: 4px;
}

.site-nav {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.site-nav a {
  color: var(--on-ink-muted);
  text-decoration: none;
  font-size: 15px;
  padding: 6px 12px;
  border-radius: 999px;
  transition: color 0.15s, background 0.15s;
}

.site-nav a:hover {
  color: var(--on-ink);
  background: rgba(232, 239, 236, 0.07);
}

@media (max-width: 720px) {
  .site-nav a:not(.nav-contact) {
    display: none;
  }
}

.nav-contact {
  border: 1px solid rgba(62, 207, 154, 0.45);
  color: var(--accent-on-ink) !important;
}

.hero {
  padding-top: 72px;
  padding-bottom: 88px;
}

@media (max-width: 600px) {
  .hero {
    padding-top: 40px;
    padding-bottom: 64px;
  }
}

.eyebrow {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--accent-on-ink);
  margin: 0 0 20px;
}

.hero h1 {
  font-size: clamp(36px, 6vw, 64px);
  line-height: 1.04;
  letter-spacing: -0.03em;
  font-weight: 700;
  margin: 0 0 24px;
  max-width: 16ch;
}

.hero .lede {
  font-size: clamp(17px, 2.1vw, 20px);
  color: var(--on-ink-muted);
  max-width: 60ch;
  margin: 0 0 36px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 16px;
  text-decoration: none;
  transition: transform 0.15s, background 0.15s, border-color 0.15s;
}

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

.btn-primary {
  background: var(--accent-on-ink);
  color: var(--ink);
}

.btn-primary:hover {
  background: #5cdcae;
}

.btn-ghost {
  color: var(--on-ink);
  border: 1px solid rgba(232, 239, 236, 0.22);
}

.btn-ghost:hover {
  border-color: rgba(232, 239, 236, 0.5);
}

/* Content sections */

section {
  padding: 96px 0;
}

@media (max-width: 600px) {
  section {
    padding: 64px 0;
  }
}

section + section {
  border-top: 1px solid var(--line);
}

.section-head {
  max-width: 680px;
  margin-bottom: 48px;
}

.section-label {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin: 0 0 12px;
}

h2 {
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.12;
  letter-spacing: -0.025em;
  margin: 0 0 16px;
}

.section-head p {
  color: var(--text-muted);
  margin: 0;
}

h3 {
  font-size: 19px;
  letter-spacing: -0.01em;
  line-height: 1.3;
  margin: 0 0 10px;
}

.grid {
  display: grid;
  gap: 20px;
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

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

@media (max-width: 960px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 680px) {
  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }
}

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

@media (max-width: 600px) {
  .card {
    padding: 22px;
  }
}

.card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 16px;
}

.card-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  color: var(--accent);
  margin-bottom: 18px;
}

.card-icon svg {
  width: 22px;
  height: 22px;
}

.oss-card {
  display: block;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s, transform 0.15s;
}

.oss-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.oss-name {
  font-family: var(--mono);
  font-size: 16px;
  color: var(--accent);
  margin: 0 0 8px;
}

.about {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 56px;
  align-items: start;
}

@media (max-width: 860px) {
  .about {
    grid-template-columns: 1fr;
    gap: 36px;
  }
}

.about p {
  color: var(--text-muted);
  margin: 0 0 16px;
}

.facts {
  margin: 0;
  display: grid;
  gap: 0;
}

.facts div {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.facts div:first-child {
  border-top: 1px solid var(--line);
}

@media (max-width: 480px) {
  .facts div {
    grid-template-columns: 1fr;
    gap: 2px;
  }
}

.facts dt {
  font-size: 14px;
  color: var(--text-muted);
}

.facts dd {
  margin: 0;
  font-size: 16px;
}

.contact {
  background: var(--ink);
  color: var(--on-ink);
  border-radius: 20px;
  padding: 56px;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 32px;
  flex-wrap: wrap;
  background-image: radial-gradient(600px 300px at 100% 0%, rgba(62, 207, 154, 0.18), transparent 60%);
}

@media (max-width: 600px) {
  .contact {
    padding: 32px 22px;
  }
}

.contact h2 {
  color: var(--on-ink);
}

.contact p {
  color: var(--on-ink-muted);
  margin: 0;
  max-width: 48ch;
}

.contact-email {
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 650;
  color: var(--accent-on-ink);
  text-decoration: none;
  border-bottom: 2px solid rgba(62, 207, 154, 0.4);
  padding-bottom: 2px;
  word-break: break-all;
}

.contact-email:hover {
  border-bottom-color: var(--accent-on-ink);
}

.site-footer {
  padding: 36px 0 48px;
  font-size: 14px;
  color: var(--text-muted);
}

.site-footer .wrap {
  display: flex;
  justify-content: space-between;
  gap: 12px 32px;
  flex-wrap: wrap;
}

.site-footer p {
  margin: 0;
}

.legal span + span::before {
  content: "·";
  margin: 0 8px;
  opacity: 0.6;
}

@media (max-width: 600px) {
  .legal span {
    display: block;
  }

  .legal span + span::before {
    content: none;
  }
}

/* 404 */

.not-found {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.not-found > .wrap {
  width: 100%;
}

.not-found .hero {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}