:root {
  color-scheme: dark;
  --navy-950: #050b13;
  --navy-900: #07101d;
  --navy-850: #0a1524;
  --navy-800: #0d1a2b;
  --blue-600: #003f80;
  --blue-500: #004c99;
  --blue-400: #1268b8;
  --blue-300: #72b6f4;
  --white: #f6f9fc;
  --slate-200: #cbd6e2;
  --slate-300: #a7b6c7;
  --slate-500: #74869a;
  --line: #293b50;
  --line-bright: #40566e;
  --shell: 1180px;
  --gutter: clamp(1.25rem, 4vw, 3rem);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 6.5rem;
}

body {
  margin: 0;
  min-width: 0;
  overflow-x: hidden;
  background: var(--navy-950);
  color: var(--slate-200);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

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

a {
  color: inherit;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.22em;
}

a:focus-visible {
  outline: 3px solid var(--blue-300);
  outline-offset: 4px;
  border-radius: 0.15rem;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.7rem 1rem;
  transform: translateY(-150%);
  background: var(--white);
  border-radius: 0.25rem;
  color: var(--navy-950);
  font-weight: 700;
}

.skip-link:focus {
  transform: translateY(0);
}

.shell {
  width: min(100% - (2 * var(--gutter)), var(--shell));
  margin-inline: auto;
}

.site-header {
  position: relative;
  z-index: 10;
  border-bottom: 1px solid var(--line);
  background: rgba(5, 11, 19, 0.96);
}

.header-inner {
  min-height: 5.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem 3rem;
}

.brand,
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--white);
  font-weight: 760;
  letter-spacing: -0.025em;
}

.brand {
  flex: 0 0 auto;
  font-size: 1.18rem;
  text-decoration: none;
}

.brand img,
.footer-brand img {
  width: 2.5rem;
  height: 2.5rem;
  object-fit: contain;
}

.primary-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 0.35rem clamp(0.8rem, 2vw, 1.5rem);
  font-size: 0.84rem;
  font-weight: 680;
}

.primary-nav a {
  padding-block: 0.85rem;
  color: var(--slate-300);
  text-decoration: none;
  white-space: nowrap;
}

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

.primary-nav .external-link {
  color: var(--blue-300);
}

.hero {
  position: relative;
  isolation: isolate;
  border-bottom: 1px solid var(--line);
  background: var(--navy-900);
}

.hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 0;
  opacity: 0.32;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 4rem 4rem;
  mask-image: linear-gradient(to right, transparent 0%, black 58%, black 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(17rem, 0.75fr);
  align-items: center;
  gap: clamp(3rem, 8vw, 7rem);
  min-height: calc(100svh - 5.25rem);
  padding-block: clamp(4.5rem, 10vh, 7.5rem);
}

.eyebrow,
.section-index {
  margin: 0 0 1.25rem;
  color: var(--blue-300);
  font-size: 0.73rem;
  font-weight: 760;
  letter-spacing: 0.16em;
  line-height: 1.4;
  text-transform: uppercase;
}

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

h1,
h2,
h3 {
  margin-top: 0;
  color: var(--white);
  line-height: 1.07;
}

h1 {
  max-width: 13ch;
  margin-bottom: 1.7rem;
  font-size: clamp(2.65rem, 5.5vw, 5rem);
  letter-spacing: -0.055em;
}

h1 span {
  color: var(--blue-400);
}

.hero-intro {
  max-width: 42rem;
  margin: 0 0 1.65rem;
  color: var(--slate-200);
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
  line-height: 1.55;
}

.status-label {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0;
  color: var(--white);
  font-size: 0.78rem;
  font-weight: 740;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.status-label span {
  width: 0.55rem;
  height: 0.55rem;
  flex: 0 0 auto;
  border: 2px solid var(--blue-300);
  border-radius: 50%;
  background: var(--blue-500);
}

.hero-actions {
  display: flex;
  align-items: stretch;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 2.25rem;
}

.button {
  min-height: 3.25rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  padding: 0.75rem 1.2rem;
  border: 1px solid transparent;
  border-radius: 0.25rem;
  color: var(--white);
  font-size: 0.9rem;
  font-weight: 740;
  line-height: 1.3;
  text-decoration: none;
}

.button-primary {
  background: var(--blue-500);
  border-color: var(--blue-500);
}

.button-primary:hover {
  background: var(--blue-600);
  border-color: var(--blue-400);
}

.button-secondary {
  background: var(--navy-850);
  border-color: var(--line-bright);
}

.button-secondary:hover {
  background: var(--navy-800);
  border-color: var(--slate-500);
}

.hero-mark {
  width: min(100%, 24rem);
  justify-self: end;
}

.mark-frame {
  position: relative;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-bright);
  background: var(--navy-950);
}

.mark-frame::before,
.mark-frame::after {
  content: "";
  position: absolute;
  width: 1rem;
  height: 1rem;
  border-color: var(--blue-400);
}

.mark-frame::before {
  top: -1px;
  left: -1px;
  border-top: 2px solid var(--blue-400);
  border-left: 2px solid var(--blue-400);
}

.mark-frame::after {
  right: -1px;
  bottom: -1px;
  border-right: 2px solid var(--blue-400);
  border-bottom: 2px solid var(--blue-400);
}

.mark-frame img {
  width: 76%;
  height: 76%;
  object-fit: contain;
}

.hero-mark > p {
  display: flex;
  justify-content: space-between;
  margin: 0;
  padding: 0.7rem 0.15rem 0;
  color: var(--slate-500);
  font-family: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
}

.section {
  scroll-margin-top: 2rem;
  padding-block: clamp(5rem, 11vw, 9rem);
}

.overview {
  background: var(--navy-950);
}

.overview-grid {
  display: grid;
  grid-template-columns: minmax(15rem, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(3rem, 9vw, 8rem);
}

.section-heading h2 {
  max-width: 13ch;
  margin-bottom: 0;
  font-size: clamp(2rem, 4.2vw, 3.8rem);
  letter-spacing: -0.045em;
}

.overview-copy {
  max-width: 42rem;
  border-top: 1px solid var(--line-bright);
  padding-top: 1.75rem;
}

.overview-copy p {
  margin: 0 0 1.4rem;
}

.overview-copy p:last-child {
  margin-bottom: 0;
}

.overview-copy .lead {
  color: var(--white);
  font-size: clamp(1.15rem, 2vw, 1.45rem);
  line-height: 1.5;
}

.concept {
  border-block: 1px solid var(--line);
  background: var(--navy-900);
}

.section-heading-wide {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: clamp(3rem, 7vw, 5rem);
}

.section-heading-wide .section-index {
  margin-bottom: 0.35rem;
}

.section-heading-wide h2 {
  max-width: 15ch;
  text-align: right;
}

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

.concept-list li {
  display: grid;
  grid-template-columns: minmax(3rem, 0.25fr) minmax(0, 1fr);
  gap: 1.5rem;
  padding: clamp(1.75rem, 4vw, 2.6rem) 0;
  border-bottom: 1px solid var(--line);
}

.concept-number {
  color: var(--blue-300);
  font-family: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.78rem;
}

.concept-list h3 {
  margin-bottom: 0.65rem;
  font-size: clamp(1.35rem, 2.5vw, 2rem);
  letter-spacing: -0.025em;
}

.concept-list p {
  max-width: 40rem;
  margin: 0;
  color: var(--slate-300);
}

.development {
  background: var(--navy-950);
}

.development-panel {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: clamp(3rem, 9vw, 8rem);
  padding-block: clamp(2.25rem, 5vw, 4rem);
  border-top: 2px solid var(--blue-500);
  border-bottom: 1px solid var(--line-bright);
}

.development-heading .status-label {
  margin-bottom: 1.4rem;
}

.development-heading h2 {
  max-width: 12ch;
  margin-bottom: 0;
  font-size: clamp(2rem, 4vw, 3.6rem);
  letter-spacing: -0.045em;
}

.development-copy {
  padding-top: 2.5rem;
}

.development-copy > p {
  margin: 0 0 2rem;
  color: var(--slate-200);
  font-size: clamp(1.05rem, 1.8vw, 1.3rem);
}

.text-links {
  display: flex;
  align-items: flex-start;
  flex-direction: column;
  gap: 0.9rem;
}

.text-links a {
  color: var(--blue-300);
  font-weight: 720;
}

.text-links a:hover {
  color: var(--white);
}

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--navy-900);
}

.footer-inner {
  min-height: 8rem;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 1.5rem 3rem;
  padding-block: 1.5rem;
}

.footer-brand {
  font-size: 1rem;
}

.footer-brand img {
  width: 2rem;
  height: 2rem;
}

.footer-inner p {
  margin: 0;
  color: var(--slate-500);
  font-size: 0.78rem;
}

.footer-inner nav {
  display: flex;
  gap: 1.5rem;
}

.footer-inner nav a {
  color: var(--slate-300);
  font-size: 0.82rem;
  font-weight: 680;
  text-decoration: none;
}

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

.copyright {
  white-space: nowrap;
}

@media (max-width: 900px) {
  .header-inner {
    padding-block: 0.65rem;
  }

  .primary-nav {
    gap-inline: 1rem;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(13rem, 0.65fr);
    gap: 2.5rem;
  }

  .footer-inner {
    grid-template-columns: auto minmax(0, 1fr) auto;
  }

  .footer-inner .copyright {
    grid-column: 2;
  }
}

@media (max-width: 720px) {
  html {
    scroll-padding-top: 1rem;
  }

  .header-inner {
    display: block;
    padding-block: 0.75rem 0.4rem;
  }

  .brand {
    margin-bottom: 0.25rem;
  }

  .primary-nav {
    justify-content: flex-start;
    gap: 0 1.15rem;
  }

  .primary-nav a {
    min-height: 2.75rem;
    display: inline-flex;
    align-items: center;
    padding-block: 0.55rem;
  }

  .hero-grid {
    min-height: 0;
    grid-template-columns: 1fr;
    padding-block: clamp(3.5rem, 13vw, 5rem);
  }

  .hero-mark {
    display: none;
  }

  .overview-grid,
  .development-panel {
    grid-template-columns: 1fr;
    gap: 2.75rem;
  }

  .section-heading-wide {
    display: block;
  }

  .section-heading-wide .section-index {
    margin-bottom: 1.25rem;
  }

  .section-heading-wide h2 {
    text-align: left;
  }

  .development-copy {
    padding-top: 0;
  }

  .footer-inner {
    grid-template-columns: 1fr auto;
    gap: 1rem 1.5rem;
    padding-block: 2rem;
  }

  .footer-inner > p:not(.copyright) {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .footer-inner nav {
    justify-self: end;
  }

  .footer-inner .copyright {
    grid-column: 1 / -1;
  }
}

@media (max-width: 440px) {
  :root {
    --gutter: 1.1rem;
  }

  .primary-nav {
    font-size: 0.78rem;
    column-gap: 0.9rem;
  }

  h1 {
    font-size: clamp(2.45rem, 13vw, 3.35rem);
  }

  .hero-actions {
    display: grid;
  }

  .button {
    width: 100%;
  }

  .concept-list li {
    grid-template-columns: 2.5rem minmax(0, 1fr);
    gap: 0.75rem;
  }

  .footer-inner {
    display: flex;
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-inner nav {
    min-height: 2.75rem;
    align-items: center;
  }
}

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