:root {
  color-scheme: dark;
  --bg-deep: #1d2021;
  --bg: #282828;
  --bg-soft: #32302f;
  --surface: #3c3836;
  --line: #504945;
  --line-strong: #665c54;
  --text: #fbf1c7;
  --text-soft: #ebdbb2;
  --muted: #bdae93;
  --muted-dark: #a89984;
  --accent: #8ec07c;
  --accent-strong: #b8bb26;
  --warning: #fabd2f;
  --radius: 14px;
  --shell: min(1180px, calc(100% - 40px));
  --font-sans: "Avenir Next", Avenir, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--bg-deep);
  scroll-behavior: smooth;
}

[id] {
  scroll-margin-top: 96px;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(
      circle at 78% 12%,
      rgb(69 133 136 / 14%),
      transparent 27rem
    ),
    var(--bg-deep);
  color: var(--text-soft);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-underline-offset: 0.2em;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button,
.button {
  min-height: 44px;
}

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 10;
  padding: 10px 14px;
  border-radius: var(--radius);
  background: var(--accent);
  color: var(--bg-deep);
  font-weight: 800;
  transform: translateY(-180%);
  transition: transform 160ms ease;
}

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

.shell {
  width: var(--shell);
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  border-bottom: 1px solid rgb(80 73 69 / 80%);
  background: rgb(29 32 33 / 88%);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.nav-shell {
  display: flex;
  min-height: 70px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  gap: 11px;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.91rem;
  font-weight: 750;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 10px;
  background: var(--accent);
  color: var(--bg-deep);
  font-size: 0.75rem;
  font-weight: 900;
  letter-spacing: -0.08em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  white-space: nowrap;
}

.site-nav a {
  display: inline-flex;
  min-height: 44px;
  color: var(--muted);
  align-items: center;
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
  transition: color 180ms ease;
}

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

.hero {
  display: grid;
  min-height: calc(100dvh - 70px);
  grid-template-columns: minmax(0, 1.08fr) minmax(400px, 0.92fr);
  align-items: center;
  gap: clamp(36px, 5vw, 70px);
  padding-block: clamp(48px, 8vh, 84px);
}

.hero-copy h1 {
  margin: 0;
  color: var(--text);
  font-size: clamp(3.3rem, 4.5vw, 4rem);
  font-weight: 820;
  letter-spacing: -0.065em;
  line-height: 0.98;
}

.hero-copy > p {
  max-width: 39rem;
  margin: 30px 0 0;
  color: var(--muted);
  font-size: clamp(1.04rem, 1.6vw, 1.23rem);
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 18px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 0.92rem;
  font-weight: 800;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  transition:
    transform 180ms cubic-bezier(0.16, 1, 0.3, 1),
    border-color 180ms ease,
    background-color 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button:active {
  transform: translateY(1px);
}

.button-primary {
  background: var(--accent);
  color: var(--bg-deep);
}

.button-primary:hover {
  background: var(--accent-strong);
}

.button-secondary {
  border-color: var(--line-strong);
  background: var(--bg-soft);
  color: var(--text);
}

.button-secondary:hover {
  border-color: var(--accent);
}

.hero-media {
  margin: 0;
}

.media-frame {
  display: block;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--bg);
  box-shadow: 0 30px 80px rgb(10 12 12 / 35%);
}

.hero-media video,
.hero-media img {
  display: block;
  width: 100%;
  height: auto;
}

.hero-media figcaption {
  margin-top: 12px;
  color: var(--muted-dark);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.hero-media figcaption a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  color: inherit;
  font-weight: 700;
}

.hero-media figcaption a:hover {
  color: var(--accent);
}

.protocol-strip {
  border-block: 1px solid var(--line);
  background: rgb(40 40 40 / 68%);
}

.protocol-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.protocol-grid > div {
  min-width: 0;
  padding: 24px 20px;
  border-left: 1px solid var(--line);
}

.protocol-grid > div:last-child {
  border-right: 1px solid var(--line);
}

.protocol-grid span,
.protocol-grid code {
  display: block;
}

.protocol-grid span {
  color: var(--text);
  font-size: 0.83rem;
  font-weight: 800;
}

.protocol-grid code {
  overflow: hidden;
  margin-top: 5px;
  color: var(--muted-dark);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.section {
  padding-block: clamp(88px, 11vw, 150px);
}

.section-heading {
  max-width: 760px;
  margin-bottom: clamp(42px, 6vw, 72px);
}

.section-heading.narrow {
  max-width: 680px;
}

.section-heading h2,
.responsible-use h2,
.closing h2 {
  margin: 0;
  color: var(--text);
  font-size: clamp(2.3rem, 4.5vw, 4.4rem);
  font-weight: 820;
  letter-spacing: -0.055em;
  line-height: 1.03;
}

.section-heading p {
  max-width: 62ch;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 1.04rem;
}

.quick-start-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(320px, 0.88fr);
  align-items: start;
  gap: clamp(36px, 7vw, 94px);
}

.code-panel {
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--bg);
  box-shadow: 0 26px 70px rgb(10 12 12 / 28%);
}

.code-panel-bar {
  display: flex;
  min-height: 52px;
  align-items: center;
  justify-content: space-between;
  padding: 0 14px 0 20px;
  border-bottom: 1px solid var(--line);
  background: var(--bg-soft);
}

.code-panel-bar span {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.copy-button {
  padding: 8px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: var(--bg-deep);
  color: var(--text-soft);
  font: 700 0.78rem var(--font-sans);
  cursor: pointer;
}

.copy-button:hover {
  border-color: var(--accent);
  color: var(--text);
}

.code-panel pre {
  max-width: 100%;
  margin: 0;
  padding: 34px 30px;
  overflow-x: auto;
  color: var(--accent);
  font: 700 clamp(0.78rem, 1.35vw, 1rem) / 1.7 var(--font-mono);
}

.code-note {
  margin: 0;
  padding: 0 30px 28px;
  color: var(--muted-dark);
  font-size: 0.83rem;
}

.setup-path {
  display: grid;
  gap: 28px;
}

.setup-path article {
  padding-left: 24px;
  border-left: 2px solid var(--line-strong);
}

.setup-path article:last-child {
  border-color: var(--accent);
}

.setup-path h3,
.client-map h3,
.capability h3 {
  margin: 0;
  color: var(--text);
  font-size: 1.08rem;
  letter-spacing: -0.02em;
}

.setup-path p,
.client-map p,
.capability p {
  margin: 8px 0 0;
  color: var(--muted);
}

.copy-status {
  min-height: 1.5em;
  margin: 14px 0 0;
  color: var(--accent);
  font-size: 0.86rem;
  font-weight: 700;
}

.clients {
  border-top: 1px solid var(--line);
}

.client-map {
  border-top: 1px solid var(--line-strong);
}

.client-map article {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(260px, 0.9fr) auto;
  align-items: center;
  gap: 30px;
  padding: 28px 2px;
  border-bottom: 1px solid var(--line);
}

.client-map p {
  font-size: 0.9rem;
}

.client-map code,
.route-pair code {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.86rem;
}

.client-map a,
.capability a,
.policy-links a,
.site-footer a {
  display: inline-flex;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  color: var(--text-soft);
  font-size: 0.88rem;
  font-weight: 800;
}

.client-map a:hover,
.capability a:hover,
.policy-links a:hover,
.site-footer a:hover {
  color: var(--accent);
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 16px;
}

.capability {
  grid-column: span 4;
  min-height: 230px;
  padding: clamp(24px, 3.5vw, 38px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg);
}

.capability-wide {
  display: flex;
  grid-column: span 8;
  min-height: 280px;
  flex-direction: column;
  justify-content: flex-end;
}

.capability-accent {
  border-color: rgb(142 192 124 / 58%);
  background: linear-gradient(145deg, rgb(142 192 124 / 15%), var(--bg) 72%);
}

.capability-pattern {
  background:
    linear-gradient(90deg, rgb(80 73 69 / 32%) 1px, transparent 1px),
    linear-gradient(rgb(80 73 69 / 32%) 1px, transparent 1px), var(--bg-soft);
  background-size: 24px 24px;
}

.capability p {
  max-width: 47ch;
  font-size: 0.94rem;
}

.capability a {
  display: inline-block;
  margin-top: 28px;
}

.route-pair {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.route-pair code {
  padding: 9px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  background: var(--bg-deep);
}

.responsible-use {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 54px;
  padding: clamp(38px, 5vw, 64px);
  border: 1px solid rgb(250 189 47 / 48%);
  border-radius: var(--radius);
  background: rgb(60 56 54 / 48%);
}

.responsible-use h2 {
  max-width: 15ch;
  font-size: clamp(2rem, 4vw, 3.8rem);
}

.responsible-use p {
  max-width: 64ch;
  margin: 22px 0 0;
  color: var(--muted);
}

.policy-links {
  display: grid;
  gap: 12px;
  justify-items: start;
}

.closing {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
}

.closing h2 {
  max-width: 14ch;
}

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

.footer-shell {
  display: flex;
  min-height: 112px;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.footer-shell p {
  margin: 0;
  color: var(--muted-dark);
  font-size: 0.86rem;
}

.footer-shell div {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
}

.reveal {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: no-preference) {
  .reveal {
    animation: reveal 700ms cubic-bezier(0.16, 1, 0.3, 1) both;
  }

  .reveal-late {
    animation-delay: 120ms;
  }
}

@keyframes reveal {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
}

@media (max-width: 940px) {
  .hero {
    min-height: auto;
    grid-template-columns: 1fr;
    padding-block: 72px;
  }

  .hero-copy h1 {
    max-width: 14ch;
  }

  .hero-media {
    max-width: 760px;
  }

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

  .protocol-grid > div:nth-child(3) {
    border-top: 1px solid var(--line);
  }

  .protocol-grid > div:nth-child(4) {
    border-top: 1px solid var(--line);
  }

  .quick-start-grid {
    grid-template-columns: 1fr;
  }

  .client-map article {
    grid-template-columns: 1fr auto;
  }

  .client-map article > div {
    grid-column: 1 / -1;
  }

  .capability,
  .capability-wide {
    grid-column: span 6;
  }

  .responsible-use {
    grid-template-columns: 1fr;
    align-items: start;
  }
}

@media (max-width: 640px) {
  :root {
    --shell: min(100% - 28px, 1180px);
  }

  .nav-shell {
    gap: 14px;
  }

  .brand {
    font-size: 0.8rem;
  }

  .brand-mark {
    width: 32px;
    height: 32px;
  }

  .site-nav {
    gap: 16px;
  }

  .site-nav a {
    font-size: 0.8rem;
  }

  .nav-docs {
    display: none;
  }

  .hero {
    gap: 44px;
    padding-block: 54px;
  }

  .hero-copy h1 {
    font-size: clamp(2.8rem, 13.2vw, 3.5rem);
  }

  .hero-actions,
  .closing,
  .footer-shell {
    align-items: stretch;
    flex-direction: column;
  }

  .hero-actions .button,
  .closing .button {
    width: 100%;
  }

  .protocol-grid {
    grid-template-columns: 1fr;
  }

  .protocol-grid > div {
    border-top: 1px solid var(--line);
    border-right: 1px solid var(--line);
  }

  .protocol-grid > div:first-child {
    border-top: 0;
  }

  .section {
    padding-block: 84px;
  }

  .code-panel pre {
    padding: 28px 20px;
  }

  .code-note {
    padding: 0 20px 24px;
  }

  .client-map article {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .client-map article > div {
    grid-column: auto;
  }

  .capability,
  .capability-wide {
    grid-column: 1 / -1;
    min-height: auto;
  }

  .responsible-use {
    padding: 26px;
  }

  .closing {
    gap: 34px;
  }

  .footer-shell {
    padding-block: 34px;
  }
}

@media (max-width: 360px) {
  .brand > span:last-child {
    display: none;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

@media (prefers-reduced-transparency: reduce) {
  .site-header {
    background: var(--bg-deep);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
}