/* Layout: sticky top bar, section rail on the left, and each operation as prose beside a dark wire panel. */
:root {
  --bg: #ffffff;
  --surface: #f6f8fb;
  --surface-2: #edf1f6;
  --line: #e2e7ee;
  --text: #121a25;
  --muted: #5b6678;
  --faint: #8a94a5;
  --brand: #0654a9;
  --brand-soft: #e9f1fb;
  --accent: #8e4dd2;
  --accent-soft: #f3ecfb;
  --get: #0654a9;
  --post: #8e4dd2;
  --on-method: #ffffff;
  --logo-n: #8e4dd2;
  --logo-banks: #0654a9;
  --logo-sub: #808080;
  --ok: #17845a;
  --warn: #b0650a;
  --err: #c0392f;
  --wire: #0d1520;
  --wire-2: #131d2b;
  --wire-line: #22314a;
  --wire-text: #dde6f1;
  --wire-muted: #8395ad;
  --k: #8fc4ff;
  --s: #a6e3a1;
  --n: #ffc58a;
  --l: #d4a6ff;
  --f-display: "Montserrat", "Segoe UI", system-ui, sans-serif;
  --f-body: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, Consolas, monospace;
  --top: 60px;
  --nav: 272px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0a0f16; --surface: #0f1620; --surface-2: #16202d; --line: #1f2b3b;
    --text: #e6ecf4; --muted: #9aa7b9; --faint: #6c7a8e;
    --brand: #6ea9f4; --brand-soft: #12233a; --accent: #b78cf2; --accent-soft: #221a33;
    --get: #6ea9f4; --post: #b78cf2; --on-method: #07101b; --logo-n: #b78cf2; --logo-banks: #6ea9f4; --logo-sub: #9aa7b9; --ok: #4cc28c; --warn: #e7a24a; --err: #f07a70;
    --wire: #060a10; --wire-2: #0c131d; --wire-line: #1b2638;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0a0f16; --surface: #0f1620; --surface-2: #16202d; --line: #1f2b3b;
  --text: #e6ecf4; --muted: #9aa7b9; --faint: #6c7a8e;
  --brand: #6ea9f4; --brand-soft: #12233a; --accent: #b78cf2; --accent-soft: #221a33;
  --get: #6ea9f4; --post: #b78cf2; --on-method: #07101b; --logo-n: #b78cf2; --logo-banks: #6ea9f4; --logo-sub: #9aa7b9; --ok: #4cc28c; --warn: #e7a24a; --err: #f07a70;
  --wire: #060a10; --wire-2: #0c131d; --wire-line: #1b2638;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-padding-top: calc(var(--top) + 16px); }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
body { margin: 0; background: var(--bg); color: var(--text); font: 15.5px/1.65 var(--f-body); -webkit-font-smoothing: antialiased; }
a { color: var(--brand); text-underline-offset: 3px; }
code, pre, kbd { font-family: var(--f-mono); }
:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; border-radius: 4px; }
h1, h2, h3, h4 { font-family: var(--f-display); letter-spacing: -.015em; text-wrap: balance; margin: 0; line-height: 1.2; }

/* Top bar */
.topbar {
  position: sticky; top: 0; z-index: 30; height: var(--top);
  display: flex; align-items: center; gap: 16px; padding-inline: 20px;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: baseline; gap: 8px; color: var(--text); text-decoration: none; min-width: 0; }
.logo { font: 800 1.45rem/1 var(--f-display); letter-spacing: -.035em; white-space: nowrap; }
.logo-n { color: var(--logo-n); }
.logo-banks { color: var(--logo-banks); }
.logo-sub { font: 700 .8rem/1 var(--f-display); letter-spacing: .14em; color: var(--logo-sub); margin-top: 4px; }
.logo-sm { font-size: 1.15rem; }

/* Connection tabs */
.toptabs { display: flex; gap: 4px; margin-left: 20px; min-width: 0; overflow-x: auto; scrollbar-width: none; }
.toptabs a { padding: 8px 12px; border-radius: 8px; color: var(--muted); text-decoration: none; font: 500 .9rem var(--f-body); white-space: nowrap; }
.toptabs a:hover { color: var(--text); background: var(--surface); }
.toptabs a[aria-current="page"] { color: var(--brand); background: var(--brand-soft); font-weight: 600; }
.chip { font: 500 .72rem var(--f-mono); color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 2px 8px; }
.topbar-actions { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.ghost { font-size: .85rem; color: var(--muted); text-decoration: none; padding: 6px 10px; border-radius: 8px; }
.ghost:hover { color: var(--text); background: var(--surface); }
.segmented { display: flex; padding: 3px; border-radius: 999px; background: var(--surface-2); }
.segmented button { border: 0; background: transparent; color: var(--muted); font: 600 .74rem var(--f-body); letter-spacing: .06em; padding: 5px 11px; border-radius: 999px; cursor: pointer; }
.segmented button[aria-pressed="true"] { background: var(--bg); color: var(--text); box-shadow: 0 1px 2px rgba(0,0,0,.12); }
.icon, .menu { border: 1px solid var(--line); background: var(--bg); color: var(--text); width: 34px; height: 34px; border-radius: 9px; cursor: pointer; font-size: 1rem; }
.menu { display: none; }

/* Shell */
.layout { display: grid; grid-template-columns: var(--nav) minmax(0, 1fr); }
.nav {
  position: sticky; top: var(--top); align-self: start; height: calc(100vh - var(--top));
  overflow-y: auto; padding-block: 22px 40px; border-right: 1px solid var(--line); background: var(--surface);
}
.nav-group { padding: 18px 22px 6px; font: 600 .68rem var(--f-display); letter-spacing: .12em; text-transform: uppercase; color: var(--faint); }
.nav a { display: flex; align-items: center; gap: 9px; margin-inline: 10px; padding: 6px 12px; border-radius: 8px; color: var(--muted); text-decoration: none; font-size: .9rem; line-height: 1.35; }
.nav a:hover { color: var(--text); background: var(--surface-2); }
.nav a.active { color: var(--brand); background: var(--brand-soft); font-weight: 500; }
.nav .sub { padding-left: 14px; }
main { min-width: 0; }
.loading { padding: 40px; color: var(--muted); }

/* Hero */
.hero { position: relative; overflow: hidden; padding-block: 56px 44px; padding-inline: 48px; border-bottom: 1px solid var(--line); }
.hero::before {
  content: ""; position: absolute; inset: -40% -10% auto auto; width: 620px; height: 620px; border-radius: 50%;
  background: radial-gradient(closest-side, color-mix(in srgb, var(--accent) 16%, transparent), transparent 70%);
  pointer-events: none;
}
.eyebrow { font: 600 .74rem var(--f-display); letter-spacing: .14em; text-transform: uppercase; color: var(--accent); }
.hero h1 { font-size: clamp(2rem, 4vw, 2.9rem); font-weight: 800; margin-top: 10px; }
.hero .lede { max-width: 62ch; color: var(--muted); font-size: 1.08rem; margin: 14px 0 0; }
.flow { position: relative; display: flex; align-items: stretch; gap: 0; margin-top: 34px; max-width: 920px; }
.flow-node { flex: 1; min-width: 0; padding: 14px 16px; border: 1px solid var(--line); border-radius: 12px; background: var(--bg); }
.flow-node b { display: block; font: 600 .92rem var(--f-display); }
.flow-node span { display: block; font-size: .8rem; color: var(--muted); margin-top: 2px; }
.flow-node.you { border-color: var(--accent); background: var(--accent-soft); box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 12%, transparent); }
.flow-node.you b { color: var(--accent); }
.flow-edge { flex: 0 0 52px; display: grid; place-items: center; position: relative; }
.flow-edge::before { content: ""; position: absolute; left: 6px; right: 10px; top: 50%; border-top: 1.5px dashed var(--faint); }
.flow-edge::after { content: ""; position: absolute; right: 6px; top: calc(50% - 4px); border: 4px solid transparent; border-left: 6px solid var(--faint); }
.flow-edge.labelled { flex-basis: 150px; }
.flow-edge small { position: relative; top: -14px; font: 500 .62rem var(--f-mono); color: var(--faint); background: var(--bg); padding: 0 4px; white-space: nowrap; }
.facts { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.fact { display: flex; gap: 8px; align-items: baseline; padding: 8px 12px; border-radius: 10px; background: var(--surface); border: 1px solid var(--line); font-size: .84rem; }
.fact span { color: var(--muted); }
.fact code { font-size: .8rem; color: var(--text); }

/* Guide prose */
.doc { padding-block: 44px; padding-inline: 48px; border-bottom: 1px solid var(--line); }
.prose { max-width: 74ch; }
.prose > * { margin: 0; }
.prose > * + * { margin-top: 14px; }
.prose h2 { font-size: 1.55rem; font-weight: 700; margin-bottom: 18px; }
.prose h3 { font-size: 1.1rem; margin-top: 26px; }
.prose ul, .prose ol { padding-left: 1.3rem; }
.prose li + li { margin-top: 6px; }
.prose code { font-size: .86em; background: var(--surface-2); border-radius: 5px; padding: 1px 6px; }
.prose pre { background: var(--wire); color: var(--wire-text); border-radius: 12px; padding: 16px 18px; overflow-x: auto; font-size: .84rem; line-height: 1.6; }
.prose pre code { background: none; padding: 0; color: inherit; }
.prose blockquote { padding: 14px 18px; border-radius: 12px; background: var(--brand-soft); border: 1px solid color-mix(in srgb, var(--brand) 22%, transparent); color: var(--text); }
.prose blockquote p { margin: 0; }
.prose table { width: 100%; border-collapse: collapse; font-size: .9rem; display: block; overflow-x: auto; }
.prose th { text-align: left; font: 600 .72rem var(--f-display); letter-spacing: .06em; text-transform: uppercase; color: var(--faint); padding: 10px 12px; border-bottom: 1px solid var(--line); }
.prose td { padding: 11px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.prose td:first-child { font-weight: 500; }
.prose input[type="checkbox"] { accent-color: var(--brand); margin-right: 6px; }
.prose li:has(> input[type="checkbox"]) { list-style: none; margin-left: -1.3rem; }

/* Tag header */
.tag { padding-block: 52px 8px; padding-inline: 48px; }
.tag .eyebrow { color: var(--brand); }
.tag h2 { font-size: 1.85rem; font-weight: 800; margin-top: 6px; }
.tag p { color: var(--muted); max-width: 70ch; margin: 10px 0 0; }
.op-index { display: grid; gap: 6px; margin-top: 22px; max-width: 760px; }
.op-index a { display: flex; gap: 12px; align-items: center; padding: 10px 14px; border: 1px solid var(--line); border-radius: 10px; color: var(--text); text-decoration: none; }
.op-index a:hover { border-color: var(--brand); }
.op-index code { font-size: .84rem; color: var(--muted); margin-left: auto; }

/* Operation */
.op { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 46%); gap: 40px; padding-block: 40px; padding-inline: 48px; border-bottom: 1px solid var(--line); }
.op-doc { min-width: 0; }
.op h3 { font-size: 1.45rem; font-weight: 700; }
.endpoint { display: flex; align-items: center; gap: 10px; margin-top: 14px; padding: 9px 12px; border-radius: 10px; background: var(--surface); border: 1px solid var(--line); font: 500 .9rem var(--f-mono); min-width: 0; }
.endpoint .path { overflow-wrap: anywhere; }
.method { flex: none; font: 400 .66rem var(--f-mono); letter-spacing: .04em; color: var(--on-method); padding: 3px 7px; border-radius: 6px; background: var(--get); }
.method.post { background: var(--post); }
.nav .method { font-size: .58rem; padding: 2px 5px; min-width: 36px; text-align: center; }
.copy { margin-left: auto; border: 0; background: transparent; color: var(--faint); cursor: pointer; font: 500 .74rem var(--f-body); padding: 2px 6px; border-radius: 6px; }
.copy:hover { color: var(--text); background: var(--surface-2); }
.op-doc .prose { margin-top: 18px; }
.block-title { margin-top: 30px; padding-bottom: 8px; border-bottom: 1px solid var(--line); font: 600 .74rem var(--f-display); letter-spacing: .1em; text-transform: uppercase; color: var(--faint); display: flex; justify-content: space-between; gap: 10px; }

/* Fields */
.fields { list-style: none; margin: 0; padding: 0; }
.field { padding: 13px 0; border-bottom: 1px solid var(--line); }
.field-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 10px; }
.field-name { font: 600 .88rem var(--f-mono); }
.field-type { font: 400 .78rem var(--f-mono); color: var(--faint); }
.badge { font: 600 .64rem var(--f-body); letter-spacing: .05em; text-transform: uppercase; padding: 1px 7px; border-radius: 999px; }
.badge.req { color: var(--err); background: color-mix(in srgb, var(--err) 10%, transparent); }
.badge.in { color: var(--muted); background: var(--surface-2); }
.field-desc { color: var(--muted); font-size: .9rem; margin-top: 4px; }
.field-desc code { font-size: .84em; background: var(--surface-2); border-radius: 4px; padding: 0 4px; }
.field-example { font: .78rem var(--f-mono); color: var(--faint); margin-top: 4px; }
.nested { margin: 8px 0 0 6px; padding-left: 14px; border-left: 2px solid var(--line); }
details.nest > summary { cursor: pointer; list-style: none; font-size: .8rem; color: var(--brand); margin-top: 6px; width: fit-content; }
details.nest > summary::before { content: "+ "; }
details.nest[open] > summary::before { content: "– "; }
details.nest > summary::-webkit-details-marker { display: none; }

/* Responses */
.responses { margin-top: 8px; display: grid; gap: 8px; }
.resp { border: 1px solid var(--line); border-radius: 10px; }
.resp > summary { list-style: none; display: flex; gap: 12px; align-items: baseline; padding: 11px 14px; cursor: pointer; }
.resp > summary::-webkit-details-marker { display: none; }
.resp .body { padding: 0 14px 6px; }
.status { font: 600 .82rem var(--f-mono); flex: none; }
.s2 { color: var(--ok); } .s4 { color: var(--warn); } .s5 { color: var(--err); }
.resp-desc { color: var(--muted); font-size: .9rem; }

/* Wire panel */
.wire { position: sticky; top: calc(var(--top) + 20px); align-self: start; display: grid; gap: 14px; min-width: 0; }
.card { background: var(--wire); color: var(--wire-text); border: 1px solid var(--wire-line); border-radius: 14px; overflow: hidden; min-width: 0; }
.card-head { display: flex; align-items: center; gap: 10px; padding: 10px 14px; background: var(--wire-2); border-bottom: 1px solid var(--wire-line); font: 500 .78rem var(--f-body); color: var(--wire-muted); }
.card-head .copy { color: var(--wire-muted); }
.card-head .copy:hover { color: var(--wire-text); background: var(--wire-line); }
.tabs { display: flex; gap: 2px; }
.tabs button { border: 0; background: transparent; color: var(--wire-muted); font: 600 .76rem var(--f-mono); padding: 4px 9px; border-radius: 6px; cursor: pointer; }
.tabs button[aria-selected="true"] { background: var(--wire-line); color: var(--wire-text); }
.card pre { margin: 0; padding: 14px 16px; overflow: auto; max-height: 460px; font-size: .78rem; line-height: 1.6; }
.card textarea { display: block; width: 100%; min-height: 220px; resize: vertical; margin: 0; padding: 14px 16px; border: 0; background: transparent; color: var(--wire-text); font: .78rem/1.6 var(--f-mono); }
.card textarea:focus-visible { outline: 2px solid var(--brand); outline-offset: -2px; border-radius: 0; }
.k { color: var(--k); } .s { color: var(--s); } .n { color: var(--n); } .l { color: var(--l); } .c { color: var(--wire-muted); }
.try { margin-left: auto; border: 0; cursor: pointer; font: 600 .76rem var(--f-body); color: #fff; padding: 6px 12px; border-radius: 8px; background: linear-gradient(100deg, var(--accent), var(--brand)); }
.try:disabled { opacity: .6; cursor: progress; }
.live { font: 600 .66rem var(--f-body); letter-spacing: .08em; text-transform: uppercase; color: #0d1520; background: var(--s); border-radius: 999px; padding: 1px 7px; }
.empty { padding: 14px 16px; color: var(--wire-muted); font-size: .82rem; }

@media (max-width: 1180px) {
  .op { grid-template-columns: minmax(0, 1fr); }
  .wire { position: static; }
}
@media (max-width: 860px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
  .menu { display: inline-grid; place-items: center; }
  .nav { position: fixed; inset: var(--top) auto 0 0; width: min(86vw, 320px); z-index: 25; transform: translateX(-100%); transition: transform .2s; box-shadow: 0 10px 40px rgba(0,0,0,.25); }
  .nav.open { transform: none; }
  .logo-sub, .ghost, .chip { display: none; }
  .topbar { flex-wrap: wrap; height: auto; padding-block: 8px; }
  .toptabs { order: 3; width: 100%; margin-left: 0; }
  .hero, .doc, .tag, .op { padding-inline: 16px; }
  .flow { flex-direction: column; }
  .flow-edge { flex-basis: 34px; }
  .flow-edge::before { left: 50%; right: auto; top: 4px; bottom: 8px; border-top: 0; border-left: 1.5px dashed var(--faint); }
  .flow-edge::after { right: auto; left: calc(50% - 4px); top: auto; bottom: 2px; border: 4px solid transparent; border-top: 6px solid var(--faint); }
  .flow-edge.labelled { flex-basis: 40px; }
.flow-edge small { top: 0; left: 26px; position: absolute; }
}

/* Overview orbit */
.orbit { margin-top: 30px; max-width: 760px; }
.orbit svg { display: block; width: 100%; height: auto; overflow: visible; }
.o-ring { fill: none; stroke: var(--line); stroke-width: 1.5; stroke-dasharray: 4 6; }
.o-wire { fill: none; stroke: var(--faint); stroke-width: 1.5; stroke-dasharray: 4 5; opacity: .7; }
.o-pulse { fill: none; stroke: var(--accent); stroke-width: 3; stroke-linecap: round; stroke-dasharray: 10 200; stroke-dashoffset: 210; }
@media (prefers-reduced-motion: no-preference) {
  .o-pulse { animation: o-travel 3s linear infinite; }
  @keyframes o-travel { from { stroke-dashoffset: 210; } to { stroke-dashoffset: 0; } }
}
.o-core { fill: var(--accent-soft); stroke: var(--accent); stroke-width: 2; }
.o-logo { font: 800 26px var(--f-display); letter-spacing: -.03em; }
.o-logo .logo-n { fill: var(--logo-n); }
.o-logo .logo-banks { fill: var(--logo-banks); }
.o-node { fill: var(--bg); stroke: var(--line); stroke-width: 1.5; }
.o-label { fill: var(--text); font: 600 15px var(--f-display); }
.o-sub { fill: var(--muted); font: 500 11.5px var(--f-body); }
.o-link { cursor: pointer; }
.o-link:hover .o-node, .o-link:focus-visible .o-node { stroke: var(--brand); }
.o-link:hover .o-label { fill: var(--brand); }