:root {
  --bg: #161616;
  --bg-2: #1c1c1c;
  --surface: #222222;
  --line: #2f2f2f;
  --text: #ececec;
  --muted: #9b9b9b;
  --yellow: #fcc10e;
  --yellow-2: #d4a40c;
  --ink: #222222;
  --radius: 2px;
  --max: 1120px;
  --pad: clamp(1.25rem, 4vw, 2.5rem);
  --font: "Instrument Sans", "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5.75rem;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.55;
  letter-spacing: -0.01em;
}

body.is-nav-open {
  overflow: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.035;
  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='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--yellow);
}

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

:focus-visible {
  outline: 2px solid var(--yellow);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--yellow);
  color: var(--ink);
  padding: 0.5rem 1rem;
  z-index: 50;
}

.skip:focus {
  left: var(--pad);
  top: 0.5rem;
}

.wrap {
  width: min(var(--max), 100% - 2 * var(--pad));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled,
.site-header.is-nav-open {
  border-bottom-color: var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4.25rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: var(--text);
  font-weight: 600;
  letter-spacing: -0.03em;
  position: relative;
  z-index: 2;
}

.logo:hover {
  color: var(--text);
}

.logo-mark {
  width: 2.15rem;
  height: 2.15rem;
  flex: none;
  border-radius: 0.48rem;
}

.logo-word {
  font-size: 1.05rem;
}

.logo-word span {
  color: var(--yellow);
}

.nav-panel {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-item {
  position: relative;
}

.nav-link,
.nav-caret {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  min-height: 2.5rem;
  padding: 0 0.7rem;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
}

.nav-link:hover,
.nav-caret:hover,
.nav-link.is-active,
.nav-caret.is-active,
.nav-link[aria-current="location"],
.nav-caret[aria-current="location"] {
  color: var(--yellow);
}

.nav-caret::after {
  content: "";
  width: 0.4rem;
  height: 0.4rem;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-1px);
}

.nav-menu {
  position: absolute;
  top: calc(100% - 0.15rem);
  left: 0;
  display: none;
  min-width: 16.5rem;
  padding: 0.45rem;
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
}

.has-menu.is-open .nav-menu {
  display: grid;
}

.nav-menu a {
  display: grid;
  grid-template-columns: 1.6rem 1fr;
  gap: 0.7rem;
  align-items: center;
  padding: 0.7rem 0.75rem;
  text-decoration: none;
  color: var(--text);
  font-size: 0.95rem;
  letter-spacing: -0.02em;
  text-transform: none;
  font-family: var(--font);
}

.nav-menu a span {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--yellow);
}

.nav-menu a:hover,
.nav-menu a:focus-visible {
  background: var(--bg-2);
  color: var(--text);
}

.nav-link-mobile {
  display: none;
}

.btn-nav {
  min-height: 2.4rem;
  padding: 0 1rem;
  font-size: 0.9rem;
}

.nav-toggle {
  display: none;
  width: 2.6rem;
  height: 2.6rem;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  position: relative;
  z-index: 2;
}

.nav-toggle span {
  display: block;
  width: 1rem;
  height: 1.5px;
  margin: 0 auto;
  background: currentColor;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle span:first-child {
  transform: translateY(-3.5px);
}

.nav-toggle span:last-child {
  transform: translateY(2px);
}

.nav-toggle[aria-expanded="true"] span:first-child {
  transform: translateY(1px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:last-child {
  transform: translateY(-0.5px) rotate(-45deg);
}

.hero {
  padding: clamp(3.5rem, 10vw, 7.5rem) 0 clamp(3rem, 8vw, 6rem);
  border-bottom: 1px solid var(--line);
}

.kicker {
  margin: 0 0 1.25rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--yellow);
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.6rem, 9vw, 6.4rem);
  line-height: 0.92;
  letter-spacing: -0.055em;
  font-weight: 600;
  max-width: 14ch;
}

.hero-rule {
  width: 4.5rem;
  height: 6px;
  background: var(--yellow);
  margin: 1.75rem 0 1.5rem;
}

.lead {
  margin: 0;
  max-width: 38rem;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.2rem);
}

.section {
  padding: clamp(3.5rem, 8vw, 6rem) 0;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 5.5rem;
}

.section-head {
  display: grid;
  gap: 0.75rem;
  margin-bottom: clamp(2rem, 4vw, 3rem);
}

.section-head h2 {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  letter-spacing: -0.04em;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.card {
  background: var(--bg-2);
  padding: clamp(1.4rem, 3vw, 2rem);
  min-height: 14rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  scroll-margin-top: 6rem;
}

.card-num {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--yellow);
  letter-spacing: 0.08em;
}

.card h3 {
  margin: 0;
  font-size: 1.25rem;
  letter-spacing: -0.03em;
}

.card p {
  margin: 0;
  color: var(--muted);
  max-width: 36ch;
}

.approach {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 6vw, 5rem);
  align-items: start;
}

.approach p {
  margin: 0 0 1rem;
  color: var(--muted);
}

.facts {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.facts li {
  display: grid;
  grid-template-columns: 7.5rem 1fr;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
}

.facts span {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--yellow);
  padding-top: 0.2rem;
}

.contact {
  background: var(--surface);
}

.contact-box {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.contact h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  letter-spacing: -0.04em;
}

.contact p {
  margin: 0;
  color: var(--muted);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.1rem;
  padding: 0.7rem 1.25rem;
  background: var(--yellow);
  color: var(--ink);
  font-weight: 600;
  letter-spacing: -0.02em;
  text-decoration: none;
  border-radius: var(--radius);
}

.btn:hover {
  color: var(--ink);
  background: #ffd34a;
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--line);
  margin-left: 0.6rem;
}

.btn-ghost:hover {
  color: var(--yellow);
  border-color: var(--yellow);
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.5rem;
}

.contact-aside {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.7;
}

.contact-aside strong {
  display: block;
  color: var(--text);
  font-weight: 500;
  font-size: 1rem;
  font-family: var(--font);
  margin-bottom: 0.35rem;
}

.site-footer {
  padding: 1.5rem 0 2rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem 1.15rem;
}

.footer-nav a {
  text-decoration: none;
}

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

.not-found {
  min-height: 70vh;
  display: grid;
  place-content: center;
  text-align: center;
  gap: 1rem;
  padding: 4rem var(--pad);
}

.not-found h1 {
  margin: 0;
  font-size: clamp(3rem, 10vw, 6rem);
  letter-spacing: -0.06em;
}

.not-found p {
  margin: 0 0 1rem;
  color: var(--muted);
}

@media (max-width: 800px) {
  .grid-4,
  .approach,
  .contact-box,
  .facts li {
    grid-template-columns: 1fr;
  }

  .facts li {
    gap: 0.35rem;
  }

  .nav-toggle {
    display: grid;
    place-items: center;
  }

  .nav-panel {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 1;
    flex-direction: column;
    align-items: stretch;
    justify-content: center;
    gap: 1.5rem;
    padding: 6rem var(--pad) 2.5rem;
    background: color-mix(in srgb, var(--bg) 96%, transparent);
    backdrop-filter: blur(16px);
  }

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

  .site-nav {
    flex-direction: column;
    align-items: stretch;
    gap: 0.2rem;
  }

  .nav-link,
  .nav-caret {
    min-height: 3rem;
    padding: 0;
    font-size: 1.05rem;
    letter-spacing: 0.04em;
  }

  .nav-caret {
    display: none;
  }

  .nav-menu {
    position: static;
    display: grid;
    min-width: 0;
    padding: 0;
    background: transparent;
    border: 0;
    box-shadow: none;
  }

  .nav-menu a {
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--line);
    font-size: 1.35rem;
  }

  .nav-link-mobile {
    display: inline-flex;
    margin-top: 0.75rem;
  }

  .btn-nav {
    width: 100%;
    min-height: 3.1rem;
  }

  .btn-ghost {
    margin-left: 0;
  }
}

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