:root {
  color-scheme: dark;
  --bg: #10091c;
  --bg-raised: #190e27;
  --surface: #211333;
  --surface-2: #2a1a3f;
  --border: #44305a;
  --border-strong: #694588;
  --fg: #e9e2f5;
  --muted: #b9a9cc;
  --faint: #927da8;
  --accent: #e75aff;
  --accent-bright: #f099ff;
  --accent-soft: rgba(231, 90, 255, 0.13);
  --cyan: #50dfef;
  --green: #83d8c5;
  --red: #ff7b86;
  --blue: #77d8ec;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.28);
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--fg);
  background: radial-gradient(ellipse at top, #1b0c2c 0%, var(--bg) 55%);
  font: 1rem/1.68 var(--sans);
  text-rendering: optimizeLegibility;
}

.skip-link {
  position: fixed; top: .5rem; left: .5rem; z-index: 200;
  padding: .55rem .8rem; color: #1b0629; background: var(--accent-bright);
  border-radius: 6px; transform: translateY(-150%);
}
.skip-link:focus { transform: translateY(0); }
a { color: var(--accent-bright); text-underline-offset: .18em; }
a:hover { color: #fff2ff; }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }

.site-header {
  position: sticky; top: 0; z-index: 50;
  border-bottom: 1px solid rgba(105, 69, 136, .72);
  background: rgba(16, 9, 28, .9); backdrop-filter: blur(16px);
}
.site-header nav {
  width: min(1240px, calc(100% - 2rem)); min-height: 68px; margin: 0 auto;
  display: flex; align-items: center; gap: 1.5rem;
}
.brand {
  margin-right: auto; display: inline-flex; align-items: center; gap: .68rem;
  color: var(--fg); font-size: 1.03rem; font-weight: 760; letter-spacing: .015em; text-decoration: none;
}
.nav-links { display: flex; align-items: center; gap: .25rem; }
.navlink {
  padding: .5rem .68rem; color: var(--muted); border-radius: 7px;
  font-size: .9rem; font-weight: 620; text-decoration: none;
}
.navlink:hover, .navlink.active { color: var(--fg); background: var(--surface); }
.nav-external { margin-left: .3rem; }

main {
  width: min(1180px, calc(100% - 2.5rem)); min-height: calc(100vh - 180px);
  margin: 0 auto; padding: 3.2rem 0 5rem;
}
.site-footer {
  padding: 2rem 1.25rem 2.4rem; color: var(--muted); border-top: 1px solid var(--border);
  background: var(--bg-raised); text-align: center;
}
.site-footer p { max-width: none; margin: .2rem auto; }
.footer-meta { font-size: .86rem; }
.site-footer a { color: var(--muted); }

h1, h2, h3, h4 { line-height: 1.22; letter-spacing: -.018em; text-wrap: balance; }
h1 { margin: 0 0 1rem; font-size: clamp(2rem, 5vw, 3.8rem); }
h2 {
  margin: 2.8rem 0 1rem; padding-bottom: .55rem; border-bottom: 1px solid var(--border);
  font-size: clamp(1.42rem, 2.2vw, 1.78rem);
}
h3 { margin: 2rem 0 .65rem; font-size: 1.2rem; }
h4 { margin: 1.5rem 0 .5rem; font-size: 1.03rem; }
p, li { max-width: 74ch; }
p { margin: .85rem 0; }
li + li { margin-top: .28rem; }
strong { color: #fff; }
hr { border: 0; border-top: 1px solid var(--border); margin: 2.5rem 0; }

.feature-grid, .section-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem; margin: 1.5rem 0;
}
.feature-card, .section-card {
  display: block; padding: 1.15rem 1.2rem; color: var(--fg); border: 1px solid var(--border);
  border-radius: 10px; background: var(--surface); text-decoration: none;
  transition: border-color .16s ease, transform .16s ease, background .16s ease;
}
.feature-card:hover, .section-card:hover {
  color: var(--fg); border-color: var(--accent); background: var(--surface-2); transform: translateY(-2px);
}
.feature-card h3, .section-card h3 { margin: 0 0 .38rem; color: var(--fg); font-size: 1.05rem; }
.feature-card p, .section-card p { margin: 0; color: var(--muted); font-size: .9rem; }
.card-kicker { display: block; margin-bottom: .65rem; color: var(--accent-bright); font: 700 .72rem/1 var(--mono); text-transform: uppercase; }

.docs-wrap { display: grid; grid-template-columns: 246px minmax(0, 1fr); gap: clamp(2rem, 5vw, 4rem); align-items: start; }
.docs-nav {
  position: sticky; top: 88px; max-height: calc(100vh - 110px); overflow-y: auto;
  padding: .8rem .45rem 1rem 0; border-right: 1px solid var(--border); scrollbar-width: thin;
}
.docs-nav-head { display: flex; align-items: center; gap: .6rem; margin: 0 .75rem 1rem; }
.docs-nav-title { margin: 0; color: var(--fg); font-weight: 760; }
.docs-version { margin-left: auto; color: var(--accent-bright); font: 650 .7rem/1 var(--mono); }
.docs-nav-group {
  margin: 1.1rem .75rem .35rem; color: var(--faint); font: 700 .68rem/1.2 var(--mono);
  letter-spacing: .11em; text-transform: uppercase;
}
.docs-nav a {
  display: block; margin: .08rem 0; padding: .38rem .75rem; color: var(--muted);
  border-left: 2px solid transparent; border-radius: 0 6px 6px 0; font-size: .88rem; text-decoration: none;
}
.docs-nav a:hover { color: var(--fg); background: var(--surface); }
.docs-nav a.active { color: var(--accent-bright); border-left-color: var(--accent); background: var(--accent-soft); font-weight: 680; }
.docs-nav .nav-sep { border-top: 1px solid var(--border); margin: 1rem .75rem; }
.docs-content { min-width: 0; max-width: 850px; overflow-wrap: anywhere; }
.docs-content > h1:first-child { margin-top: 0; font-size: clamp(2rem, 4vw, 3rem); }
.docs-content > h1:first-child + p { color: #d3c6e3; font-size: 1.06rem; }

code, pre { font-family: var(--mono); }
code {
  padding: .12em .38em; color: #efe8fa; border: 1px solid rgba(105, 69, 136, .7);
  border-radius: 5px; background: var(--surface); font-size: .88em;
}
pre {
  position: relative; overflow-x: auto; margin: 1.25rem 0; padding: 1.05rem 1.15rem;
  color: #e4dcf2; border: 1px solid var(--border); border-radius: 9px; background: #0d0717;
  line-height: 1.55; box-shadow: inset 3px 0 var(--accent-soft);
}
pre code { padding: 0; border: 0; background: transparent; font-size: .87rem; }
/* Pygments / MkDocs highlighted code tokens */
.highlight .c, .highlight .c1, .highlight .cm, .highlight .cs { color: #8290a4; font-style: italic; }
.highlight .k, .highlight .kd, .highlight .kn, .highlight .kp, .highlight .kr, .highlight .kt { color: #c4a7e7; }
.highlight .nc, .highlight .nn, .highlight .nt, .highlight .ne { color: #85c9e8; }
.highlight .na, .highlight .nf, .highlight .fm { color: #91d7b7; }
.highlight .s, .highlight .s1, .highlight .s2, .highlight .sb, .highlight .sc, .highlight .se, .highlight .ss { color: #eac18b; }
.highlight .m, .highlight .mi, .highlight .mf, .highlight .il, .highlight .kc { color: #d4b4ef; }
.highlight .o, .highlight .ow, .highlight .p { color: #bac8d9; }
.highlight .err { color: #ff8f9a; }
.copy-btn {
  position: absolute; top: .55rem; right: .55rem; min-height: 30px; padding: .25rem .55rem;
  color: var(--muted); border: 1px solid var(--border); border-radius: 6px; background: var(--surface);
  font: 650 .72rem/1 var(--mono); cursor: pointer;
}
.copy-btn:hover { color: var(--accent-bright); border-color: var(--accent); }

.callout, .warn-box {
  margin: 1.3rem 0; padding: .85rem 1rem; border: 1px solid var(--border);
  border-left: 3px solid var(--blue); border-radius: 0 8px 8px 0; background: var(--surface);
}
.callout p { margin: .35rem 0; }
.callout.tip { border-left-color: var(--accent); }
.callout.warning, .warn-box { color: var(--fg); border-left-color: var(--red); background: rgba(255, 123, 134, .07); }
.callout-label { display: block; margin-bottom: .28rem; color: var(--blue); font: 750 .76rem/1.2 var(--mono); letter-spacing: .06em; text-transform: uppercase; }
.callout.tip .callout-label { color: var(--accent-bright); }
.callout.warning .callout-label { color: var(--red); }

.docs-content img[src*="/diagrams/"] { display: block; width: 100%; max-width: 640px; height: auto; margin: 1.5rem auto; }

/* Cards generated by the Markdown admonition extension. */
.docs-content .admonition {
  --admonition-color: var(--blue);
  margin: 1.3rem 0;
  padding: 0 1rem .8rem;
  border: 1px solid var(--admonition-color);
  border-radius: 8px;
  background: var(--surface);
  overflow-wrap: anywhere;
}
.docs-content .admonition > .admonition-title {
  display: flex;
  align-items: center;
  gap: .6rem;
  max-width: none;
  margin: 0 -1rem .8rem;
  padding: .65rem 1rem;
  border-bottom: 1px solid var(--border);
  border-radius: 7px 7px 0 0;
  background: color-mix(in srgb, var(--admonition-color) 12%, var(--surface));
  color: var(--admonition-color);
  font-weight: 700;
}
.docs-content .admonition-title::before {
  content: "";
  flex: 0 0 .55rem;
  height: .55rem;
  border: 2px solid currentColor;
  border-radius: 50%;
}
.docs-content .admonition > :last-child { margin-bottom: 0; }
.docs-content .admonition.tip,
.docs-content .admonition.hint,
.docs-content .admonition.success,
.docs-content .admonition.check,
.docs-content .admonition.done { --admonition-color: #91d7b7; }
.docs-content .admonition.warning,
.docs-content .admonition.caution,
.docs-content .admonition.attention { --admonition-color: #eac18b; }
.docs-content .admonition.danger,
.docs-content .admonition.error,
.docs-content .admonition.failure,
.docs-content .admonition.fail,
.docs-content .admonition.missing,
.docs-content .admonition.bug { --admonition-color: var(--red); }
.docs-content .admonition.example,
.docs-content .admonition.question,
.docs-content .admonition.help,
.docs-content .admonition.faq { --admonition-color: #c4a7e7; }
.docs-content .admonition.quote,
.docs-content .admonition.cite { --admonition-color: var(--muted); }

.table-wrap { overflow-x: auto; }
table { width: 100%; margin: 1.3rem 0; border-collapse: collapse; font-size: .92rem; }
th, td { padding: .65rem .75rem; border: 1px solid var(--border); text-align: left; vertical-align: top; }
th { color: #fff; background: var(--surface-2); }
tr:nth-child(even) td { background: rgba(255,255,255,.018); }

.demo-card {
  margin: 1.5rem 0 2rem; padding: clamp(1rem, 2.5vw, 1.5rem); border: 1px solid var(--border);
  border-radius: 12px; background: var(--bg-raised);
  box-shadow: 0 16px 45px rgba(0,0,0,.2);
}
.demo-card h3 { margin-top: 0; }
.demo-card label { display: block; margin-top: .7rem; color: var(--muted); font-size: .9rem; }
.demo-card input[type=text], .demo-card input[type=password], .demo-card input[type=number], .demo-card select, .demo-card textarea {
  width: 100%; min-height: 42px; margin: .28rem 0; padding: .55rem .65rem;
  color: var(--fg); border: 1px solid var(--border-strong); border-radius: 7px; background: #0d0717;
  font: .86rem/1.4 var(--mono);
}
.demo-card button {
  min-height: 42px; margin: .3rem .25rem .3rem 0; padding: .5rem .9rem;
  color: #1b0629; border: 1px solid var(--accent); border-radius: 7px; background: var(--accent);
  font: 700 .9rem/1.2 var(--sans); cursor: pointer;
}
.demo-card button:hover { background: var(--accent-bright); }
.demo-card button:disabled { opacity: .42; cursor: not-allowed; }
.demo-output {
  max-height: 320px; overflow-y: auto; margin-top: .85rem; padding: .8rem; color: var(--fg);
  border: 1px solid var(--border); border-radius: 7px; background: #0d0717;
  font: .84rem/1.55 var(--mono); white-space: pre-wrap; overflow-wrap: anywhere;
}
.demo-status { margin-left: .45rem; color: var(--muted); font-size: .86rem; }
.demo-note { color: var(--muted); font-size: .88rem; }
.chip-row { display: flex; flex-wrap: wrap; gap: .45rem; margin: .45rem 0 .8rem; }
.chip { display: inline-flex; align-items: center; gap: .38rem; padding: .34rem .7rem; color: var(--fg); border: 1px solid var(--border); border-radius: 999px; background: var(--surface-2); font-size: .85rem; cursor: pointer; }
.chip input { accent-color: var(--accent); }
.chip.off { opacity: .56; }
.note-list, .tx-list { display: grid; gap: .65rem; margin: 1rem 0 0; padding: 0; list-style: none; }
.note-list li, .tx-list li { max-width: none; padding: .8rem; color: var(--fg); border: 1px solid var(--border); border-radius: 8px; background: var(--bg-raised); }
.note-head { display: flex; align-items: center; gap: .65rem; margin-bottom: .45rem; }
.note-head img { width: 36px; height: 36px; border-radius: 50%; object-fit: cover; background: var(--surface-2); }
.note-head .who { font-weight: 700; }
.note-head .when { margin-left: auto; color: var(--muted); font-size: .8rem; }
.note-text { margin: .25rem 0 .5rem; white-space: pre-wrap; overflow-wrap: anywhere; }
.zap-row { display: flex; flex-wrap: wrap; gap: .4rem; align-items: center; margin-top: .5rem; }
.zap-row input { max-width: 110px; }
.invoice-box { margin-top: .6rem; padding: .65rem; color: var(--fg); border: 1px solid var(--border); border-radius: 7px; background: #0d0717; font: .76rem/1.45 var(--mono); overflow-wrap: anywhere; }
.nwc-balance { margin: .75rem 0 .25rem; color: var(--accent-bright); font-size: 1.45rem; font-weight: 780; }
.nwc-meta, .tx-list .desc { color: var(--muted); font-size: .84rem; }
.tx-list li { display: grid; grid-template-columns: auto 1fr auto; gap: .75rem; align-items: baseline; }
.tx-list .amt { margin-left: auto; font-family: var(--mono); font-weight: 700; white-space: nowrap; }
.tx-list .amt.in { color: var(--green); }
.tx-list .amt.out { color: var(--red); }
.rtc-pong { color: var(--green); }
.rtc-error { color: var(--red); }
canvas.game-canvas { max-width: 100%; image-rendering: pixelated; border: 1px solid var(--border); background: #06283d; }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; min-height: 0; }
  .hero h1 { max-width: 16ch; }
  .signal-flow { grid-template-columns: repeat(2, 1fr); }
  .signal-step:nth-child(2)::after { display: none; }
  .docs-wrap { grid-template-columns: 1fr; }
  .docs-nav { position: static; max-height: none; padding: .8rem; border: 1px solid var(--border); border-radius: 10px; column-count: 2; column-gap: 1rem; }
  .docs-nav-head, .docs-nav .nav-sep { column-span: all; }
  .docs-nav-group { break-after: avoid; }
  .docs-nav a { break-inside: avoid; }
}
@media (max-width: 620px) {
  .site-header nav { width: min(100% - 1rem, 1240px); min-height: 58px; gap: .4rem; }
  .brand-mark { width: 32px; height: 32px; }
  .nav-links { gap: 0; }
  .navlink { padding: .45rem .48rem; font-size: .82rem; }
  .nav-external { display: none; }
  main { width: min(100% - 1.4rem, 1180px); padding-top: 2rem; }
  .hero { gap: 2rem; padding-top: 1rem; }
  .hero-actions .button-link { flex: 1 1 140px; }
  .signal-flow { grid-template-columns: 1fr; }
  .signal-step::after { display: none; }
  .docs-nav { max-height: 15rem; overflow-y: auto; column-count: 1; }
  .tx-list li { grid-template-columns: 1fr; }
  .tx-list .amt { margin-left: 0; }
  pre { margin-inline: -.2rem; padding: .9rem; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

/* Library front page: plain typography, source and reference sections. */
[hidden] { display: none !important; }
.home-hero { display: grid; grid-template-columns: minmax(240px, .8fr) minmax(0, 1.4fr); gap: 3rem; align-items: stretch; padding: 1rem 0 2rem; }
.home-intro { min-width: 0; max-width: 34rem; }
.home-intro h1 { font: 650 clamp(2.8rem, 7vw, 4.5rem)/1.1 var(--sans); letter-spacing: -.04em; }
.intro-lede { font-size: clamp(1.3rem, 3vw, 1.7rem); color: var(--fg); margin: .8rem 0 0; }
.platform-logos { display: flex; flex-wrap: wrap; justify-content: center; gap: .9rem .45rem; margin: 1.5rem 0 .2rem; padding: 0; list-style: none; }
.platform-logos li { display: flex; flex: 0 0 3.65rem; flex-direction: column; align-items: center; gap: .25rem; color: var(--muted); font-size: .72rem; line-height: 1.2; text-align: center; }
.platform-logos img { display: block; width: 26px; height: 26px; object-fit: contain; filter: brightness(0) invert(1); }
.home-demo { position: relative; min-width: 0; min-height: 0; scroll-margin-top: 90px; }
.home-intro #quickstart-run { display: block; width: 100%; margin-top: 1.5rem; }
.home-intro .run-output { width: 100%; margin: .7rem 0 0; }
.home-install { border-top: 1px solid var(--border); padding: 2rem 0; scroll-margin-top: 90px; }
.home-install h2 { margin: 0 0 1.2rem; border: 0; padding: 0; }
.home-install .platform-picker { display: grid; grid-template-columns: minmax(200px, .55fr) minmax(0, 1.45fr); gap: 2rem; align-items: start; }
.home-install .platform-picker .tab-list { display: flex; flex-direction: column; gap: .45rem; margin: 0; }
.home-install .platform-picker .tab-list button { width: 100%; min-height: 44px; text-align: left; }
.home-install .platform-picker > [role=tabpanel] { grid-column: 2; grid-row: 1; min-width: 0; }
.home-install .platform-picker > [role=tabpanel] > p:first-child { margin-top: 0; }
.home-install .platform-picker .highlight { max-width: 100%; }
.source-panel { min-width: 0; }
.source-panel figure { margin: 0; }
.source-panel pre { margin: 0; border-radius: 3px; }
.home-demo .source-panel { position: absolute; inset: 0; overflow: hidden; }
.home-demo .source-panel figure, .home-demo .source-panel .highlight, .home-demo .source-panel pre { height: 100%; }
.home-demo .source-panel pre { overflow: auto; }
.home-intro button, .home-install button, [role=tab] { cursor: pointer; font: 600 .9rem/1.4 var(--sans); padding: .6rem .9rem; border: 1px solid var(--border-strong); border-radius: 3px; color: var(--fg); background: var(--surface); }
#quickstart-run { background: var(--accent); border-color: var(--accent); color: #1b0629; }
#quickstart-run:disabled { opacity: .6; cursor: progress; }
.run-output { white-space: pre-wrap; overflow-wrap: anywhere; min-height: 5rem; font-size: .8rem; border-radius: 3px; }
[role=tablist] { display: flex; flex-wrap: wrap; gap: .35rem; margin: 0 0 1rem; }
[role=tab][aria-selected=true] { color: var(--accent-bright); border-color: var(--accent); background: var(--accent-soft); }
[role=tabpanel] { min-width: 0; }
[role=tabpanel] > p:first-child { margin-top: 0; }
.capabilities { border-top: 1px solid var(--border); padding-top: 2rem; }
.capability-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .9rem; }
.capability-card { display: flex; flex-direction: column; gap: .8rem; min-height: 240px; padding: 1.45rem; color: var(--fg); background: var(--bg-raised); border: 1px solid var(--border); border-radius: 7px; text-decoration: none; transition: border-color .16s ease, background .16s ease; }
.capability-card:hover { color: var(--fg); border-color: var(--accent); background: var(--surface); }
.capability-card svg { width: 34px; height: 34px; color: var(--accent-bright); fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.capability-card h3 { margin: .15rem 0 0; font-size: 1.08rem; }
.capability-card p { margin: 0; color: var(--muted); font-size: .9rem; line-height: 1.55; }
.capability-card .card-more { margin-top: auto; color: var(--accent-bright); font-size: .83rem; font-weight: 650; }
.demo-card { box-shadow: none; border-radius: 4px; }
#seas-status { overflow-wrap: anywhere; font-size: .9rem; }
.demo-switcher { margin-top: 2rem; }
@media (max-width: 800px) {
  .home-hero { grid-template-columns: 1fr; gap: 1.5rem; }
  .home-demo { height: 300px; }
  .home-install .platform-picker { grid-template-columns: 1fr; gap: 1rem; }
  .home-install .platform-picker > [role=tabpanel] { grid-column: 1; grid-row: 2; }
  .capability-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 540px) {
  .capability-grid { grid-template-columns: 1fr; }
  .capability-card { min-height: 0; }
}

.doc-run-button {
  display: inline-block;
  margin: .6rem 0 1rem;
  padding: .55rem .9rem;
  border: 1px solid var(--accent, #f2c14e);
  border-radius: 4px;
  color: inherit;
  font-weight: 700;
  text-decoration: none;
}
.doc-run-button:hover, .doc-run-button:focus-visible {
  background: #f2c14e;
  color: #111;
}