:root {
  color-scheme: dark;
  --bg: #111a23;
  --bg-deep: #0d151d;
  --surface: #15212c;
  --text: #e2e6e9;
  --muted: #a6b0b8;
  --faint: #7a8892;
  --line: #2b3945;
  --line-strong: #435463;
  --accent: #70acd0;
  --success: #77b99c;
  --wrap: 52rem;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  min-width: 20rem;
  margin: 0;
  overflow-x: clip;
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.gateway-canvas {
  position: fixed;
  z-index: 0;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.72;
  mix-blend-mode: screen;
}

.site-header,
main,
.site-footer {
  position: relative;
  z-index: 1;
}

::selection {
  background: var(--accent);
  color: var(--bg-deep);
}

a {
  color: var(--text);
  text-decoration-color: var(--line-strong);
  text-underline-offset: 0.22em;
}

a:hover {
  color: var(--accent);
  text-decoration-color: currentColor;
}

:where(a, button, summary, [tabindex]):focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

h1,
h2,
h3,
p,
dl,
dd,
ol {
  margin-top: 0;
}

h1 {
  margin-bottom: 0.8rem;
  font-size: clamp(2.25rem, 5vw, 3.25rem);
  font-weight: 650;
  letter-spacing: -0.035em;
  line-height: 1.05;
}

h2 {
  margin-bottom: 0.75rem;
  font-size: clamp(1.5rem, 3vw, 1.9rem);
  font-weight: 620;
  letter-spacing: -0.025em;
  line-height: 1.15;
}

h3 {
  margin-bottom: 0.4rem;
  font-size: 0.95rem;
  line-height: 1.35;
}

code,
pre,
.wordmark,
.copy-button,
.step-number,
.install-list > li > span {
  font-family: var(--mono);
}

code {
  font-size: 0.88em;
  overflow-wrap: anywhere;
}

p code,
dd code,
li code {
  padding: 0.08em 0.28em;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: var(--surface);
  color: #c6dce9;
}

.wrap {
  width: min(calc(100% - 2.5rem), var(--wrap));
  margin-inline: auto;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  z-index: 10;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.55rem 0.8rem;
  transform: translateY(-180%);
  border: 1px solid var(--accent);
  background: var(--bg-deep);
}

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

.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--bg-deep);
}

.nav {
  display: flex;
  min-height: 4.25rem;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.wordmark {
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
  font-size: 0.86rem;
  font-weight: 700;
  text-decoration: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 4vw, 1.5rem);
}

.nav-links a {
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
  color: var(--muted);
  font-size: 0.82rem;
  text-decoration: none;
}

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

.hero {
  min-height: min(43rem, 82dvh);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-block: clamp(3.5rem, 8vw, 5.5rem);
}

.eyebrow {
  margin-bottom: 0.75rem;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 18ch;
  font-size: clamp(2.5rem, 5vw, 3.7rem);
}

.lede {
  max-width: 42rem;
  margin-bottom: 1.75rem;
  color: var(--muted);
  font-size: 1.08rem;
}

.proof-strip {
  max-width: 43rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  padding: 0;
  margin: 0 0 1.5rem;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  list-style: none;
}

.proof-strip li {
  min-width: 0;
  display: grid;
  gap: 0.1rem;
  padding: 0.75rem 0.85rem;
}

.proof-strip li:first-child {
  padding-left: 0;
}

.proof-strip li + li {
  border-left: 1px solid var(--line);
}

.proof-strip strong {
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.75rem;
}

.proof-strip span {
  color: var(--faint);
  font-size: 0.7rem;
  line-height: 1.45;
}

.route-preview {
  max-width: 43rem;
  margin: 0 0 1.75rem;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.route-example {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 1rem;
  padding: 0.8rem 0;
}

.route-example + .route-example {
  border-top: 1px solid var(--line);
}

.route-example code {
  color: var(--text);
  font-size: 0.86rem;
}

.route-example span {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 1.1rem;
}

.route-example strong {
  color: var(--success);
  font-size: 0.82rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
}

.hero-actions a {
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
  font-size: 0.84rem;
}

.section {
  padding-block: clamp(3.25rem, 7vw, 4.75rem);
  border-top: 1px solid var(--line);
}

.section-heading {
  max-width: 42rem;
  margin-bottom: 2rem;
}

.section-heading.compact {
  margin-bottom: 1.5rem;
}

.section-heading > p:last-child {
  margin-bottom: 0;
  color: var(--muted);
}

.code-heading {
  min-height: 2.75rem;
  display: flex;
  align-items: center;
  padding: 0.55rem 0.85rem;
  border-bottom: 1px solid var(--line);
  color: var(--faint);
  font-size: 0.75rem;
}

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

.routing-flow > li {
  display: grid;
  grid-template-columns: 2.5rem minmax(0, 1fr);
  gap: 1rem;
  padding-block: 1.35rem;
  border-bottom: 1px solid var(--line);
}

.step-number {
  padding-top: 0.1rem;
  color: var(--accent);
  font-size: 0.75rem;
}

.routing-flow h3 {
  margin-bottom: 0.45rem;
}

.routing-flow > li p {
  max-width: 44rem;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line-strong);
}

.feature-list article {
  padding: 1.4rem 1.5rem 1.4rem 0;
  border-bottom: 1px solid var(--line);
}

.feature-list article:nth-child(odd) {
  padding-right: 2rem;
  border-right: 1px solid var(--line);
}

.feature-list article:nth-child(even) {
  padding-left: 2rem;
}

.feature-list p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.84rem;
}

.install-section {
  width: 100%;
  background: rgb(13 21 29 / 0.68);
}

.install-list {
  max-width: 44rem;
  padding: 0;
  margin-bottom: 0;
  list-style: none;
}

.install-list li {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: 0.75rem;
  align-items: center;
  padding-block: 0.65rem;
}

.install-list > li > span {
  color: var(--faint);
  font-size: 0.75rem;
}

.command {
  min-width: 0;
  min-height: 3.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.35rem 0.35rem 0.35rem 0.9rem;
  border: 1px solid var(--line-strong);
  background: var(--bg-deep);
}

.command code {
  min-width: 0;
  color: var(--text);
}

.copy-button {
  min-width: 3.7rem;
  min-height: 2.75rem;
  flex: 0 0 auto;
  border: 1px solid var(--line-strong);
  border-radius: 0;
  background: var(--surface);
  color: var(--muted);
  cursor: pointer;
  font-size: 0.75rem;
}

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

.copy-button[data-copied="true"] {
  border-color: var(--success);
  color: var(--success);
}

.notes-list {
  margin: 0;
  border-top: 1px solid var(--line-strong);
}

.notes-list > div {
  display: grid;
  grid-template-columns: 11rem minmax(0, 1fr);
  gap: 2rem;
  padding-block: 1.1rem;
  border-bottom: 1px solid var(--line);
}

.notes-list dt {
  font-size: 0.86rem;
  font-weight: 650;
}

.notes-list dd {
  max-width: 43rem;
  margin: 0;
  color: var(--muted);
  font-size: 0.84rem;
}

.reference details,
.faq details {
  border-top: 1px solid var(--line);
}

.reference details:last-child,
.faq details:last-child {
  border-bottom: 1px solid var(--line);
}

.faq-answer {
  max-width: 43rem;
  padding: 0 0 1.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

.faq-answer strong {
  color: var(--text);
}

summary {
  min-height: 3.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  cursor: pointer;
  font-size: 0.88rem;
  font-weight: 650;
  list-style: none;
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  color: var(--accent);
  content: "+";
  font-family: var(--mono);
}

details[open] summary::after {
  content: "-";
}

.code-heading {
  justify-content: space-between;
  border: 1px solid var(--line);
  background: var(--surface);
}

pre {
  max-width: 100%;
  margin: 0 0 1.5rem;
  padding: 1.25rem;
  overflow: auto;
  border: 1px solid var(--line);
  border-top: 0;
  background: var(--bg-deep);
  color: #c6dce9;
  font-size: 0.76rem;
  line-height: 1.7;
}

pre code {
  font-size: inherit;
  overflow-wrap: normal;
  white-space: pre;
}

.table-scroll {
  overflow-x: auto;
  padding-bottom: 1.5rem;
}

table {
  width: 100%;
  min-width: 36rem;
  border-collapse: collapse;
  font-size: 0.78rem;
}

th,
td {
  padding: 0.65rem 0.8rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--faint);
  font-size: 0.75rem;
  text-transform: uppercase;
}

.command-reference {
  margin: 0 0 1.5rem;
}

.command-reference > div {
  display: grid;
  grid-template-columns: minmax(13rem, 0.65fr) minmax(0, 1fr);
  gap: 1rem;
  padding-block: 0.65rem;
  border-bottom: 1px solid var(--line);
  font-size: 0.8rem;
}

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

.site-footer {
  padding-block: 2.5rem;
  border-top: 1px solid var(--line);
  background: var(--bg-deep);
}

.footer-inner,
.footer-inner div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}

.footer-inner p {
  margin-bottom: 0;
  font-family: var(--mono);
  font-size: 0.75rem;
}

.footer-inner p span,
.footer-inner a {
  color: var(--faint);
  font-size: 0.75rem;
}

.footer-inner a {
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
}

@media (max-width: 42rem) {
  .wrap {
    width: min(calc(100% - 2rem), var(--wrap));
  }

  .nav-links a:first-child {
    display: none;
  }

  .proof-strip {
    grid-template-columns: 1fr;
  }

  .proof-strip li,
  .proof-strip li:first-child {
    padding: 0.6rem 0;
  }

  .proof-strip li + li {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .route-example {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.75rem;
  }

  .route-example strong {
    grid-column: 1 / -1;
  }

  .feature-list {
    grid-template-columns: 1fr;
  }

  .feature-list article,
  .feature-list article:nth-child(odd),
  .feature-list article:nth-child(even) {
    padding: 1.2rem 0;
    border-right: 0;
  }

  .notes-list > div {
    grid-template-columns: 1fr;
    gap: 0.45rem;
  }

  .command-reference > div {
    grid-template-columns: 1fr;
    gap: 0.3rem;
  }

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

@media (max-width: 24rem) {
  .nav-links a:first-child,
  .nav-links a:nth-child(2) {
    display: none;
  }

  .command {
    align-items: flex-start;
    flex-direction: column;
    padding: 0.7rem;
  }
}

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

  .gateway-canvas {
    opacity: 0.42;
  }
}

/* ── Bifrost bridge animation ──────────────────── */

.bridge-figure {
  --bf-blue: #75b5dc;
  --bf-mint: #85c8aa;
  --bf-rose: #c77b80;
  --bf-amber: #d6ad72;
  margin: 0;
  border: 1px solid var(--line);
  background: radial-gradient(circle at 55% 45%, #29475b3d, transparent 38%), var(--surface);
}

.bridge-figure canvas {
  display: block;
  width: 100%;
  height: min(28rem, 54vw);
  min-height: 20rem;
}

.bridge-figure .bf-desc {
  border-top: 1px solid var(--line);
  padding: .8rem 1.1rem;
  min-height: 4rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  transition: background .25s;
}

.bridge-figure .bf-label {
  font: .82rem var(--mono);
  letter-spacing: .02em;
}

.bridge-figure .bf-detail {
  margin: .25rem 0 0;
  color: var(--muted);
  font-size: .9rem;
  line-height: 1.4;
}

.bridge-figure .bf-label::before {
  content: "● ";
  color: var(--bf-blue);
}

.bridge-figure .bf-content {
  transition: opacity .6s ease;
}

.bridge-figure .bf-desc.bf-fading .bf-content {
  opacity: 0;
}

.bridge-figure .bf-s0 { background: color-mix(in srgb, var(--bf-blue) 5%, transparent); }
.bridge-figure .bf-s1 { background: color-mix(in srgb, var(--bf-rose) 5%, transparent); }
.bridge-figure .bf-s2 { background: color-mix(in srgb, var(--bf-mint) 5%, transparent); }
.bridge-figure .bf-s3 { background: color-mix(in srgb, var(--bf-amber) 5%, transparent); }

.bridge-figure .bf-s0 .bf-label { color: var(--bf-blue); }
.bridge-figure .bf-s1 .bf-label { color: var(--bf-rose); }
.bridge-figure .bf-s2 .bf-label { color: var(--bf-mint); }
.bridge-figure .bf-s3 .bf-label { color: var(--bf-amber); }

.bridge-figure .bf-s1 .bf-label::before { color: var(--bf-rose); }
.bridge-figure .bf-s2 .bf-label::before { color: var(--bf-mint); }
.bridge-figure .bf-s3 .bf-label::before { color: var(--bf-amber); }

@media (prefers-contrast: more) {
  :root {
    --muted: #c5cdd3;
    --faint: #aab5bd;
    --line: #536574;
    --line-strong: #718391;
  }
}