:root {
  --paper: #f4efe3;
  --paper-2: #ebe4d3;
  --card: #fbf8f0;
  --ink: #17202c;
  --ink-2: #4a5568;
  --rule: #d6ccb4;
  --accent: #1f3a5f;
  --accent-ink: #f4efe3;
  --gain: #1e7a4d;
  --warn: #9a5b00;
  --bad: #b3261e;
  --focus: #c2410c;
  --shadow: 0 1px 0 rgba(23, 32, 44, 0.06), 0 8px 24px -16px rgba(23, 32, 44, 0.35);
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #12161c;
    --paper-2: #0d1116;
    --card: #1a2029;
    --ink: #ece6d6;
    --ink-2: #a3acb9;
    --rule: #2c3644;
    --accent: #8fb4e8;
    --accent-ink: #0d1116;
    --gain: #5fd39b;
    --warn: #e0a64a;
    --bad: #ff8a80;
    --focus: #ffb27a;
    --shadow: 0 1px 0 rgba(0, 0, 0, 0.4), 0 8px 24px -16px rgba(0, 0, 0, 0.8);
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  background-image: linear-gradient(var(--rule) 1px, transparent 1px);
  background-size: 100% 28px;
  background-attachment: local;
  color: var(--ink);
  font: 16px/1.55 var(--sans);
  min-width: 320px;
  overflow-x: hidden;
}
body::before { content: ""; position: fixed; inset: 0; background: var(--paper); opacity: 0.93; z-index: -1; }

a { color: var(--accent); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 4px; }

.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: 12px; top: -48px; background: var(--accent); color: var(--accent-ink); padding: 8px 14px; border-radius: 6px; z-index: 20; }
.skip:focus { top: 8px; }

.disclaimer {
  background: var(--ink);
  color: var(--paper);
  padding: 8px 16px;
  font-size: 13px;
  text-align: center;
}

.top {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 24px;
  padding: 14px 16px; max-width: 1120px; margin: 0 auto;
}
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-family: var(--serif); font-size: 20px; font-weight: 700; }
.brand em { font-style: italic; color: var(--accent); }
.brand-mark { width: 28px; height: 28px; }
.brand-mark rect { fill: var(--accent); }
.brand-mark path { fill: none; stroke: var(--accent-ink); stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; }
.top nav { display: flex; gap: 4px 18px; flex-wrap: wrap; }
.top nav a { color: var(--ink-2); text-decoration: none; padding: 6px 2px; border-bottom: 2px solid transparent; }
.top nav a:hover { color: var(--ink); border-bottom-color: var(--accent); }

main { max-width: 1120px; margin: 0 auto; padding: 0 16px 48px; }
section { margin-top: 56px; scroll-margin-top: 16px; }

.hero { margin-top: 24px; padding: 28px 0 8px; }
.eyebrow { font: 600 12px/1 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); margin: 0 0 12px; }
h1 { font: 700 clamp(30px, 6vw, 52px)/1.08 var(--serif); margin: 0 0 14px; letter-spacing: -0.01em; max-width: 18ch; }
h2 { font: 700 clamp(24px, 4vw, 32px)/1.15 var(--serif); margin: 0 0 6px; }
h3 { font: 700 18px/1.25 var(--serif); margin: 0 0 6px; }
.lede { max-width: 62ch; color: var(--ink-2); font-size: 17px; margin: 0 0 24px; }
.section-head { margin-bottom: 18px; }
.section-head p { margin: 0; color: var(--ink-2); max-width: 70ch; }
.muted { color: var(--ink-2); }
.small { font-size: 13px; }

.hero-stat { display: flex; flex-wrap: wrap; gap: 12px 40px; align-items: baseline; padding: 18px 0; border-top: 2px solid var(--ink); border-bottom: 1px solid var(--rule); }
.hero-stat .big { font: 700 clamp(34px, 8vw, 64px)/1 var(--mono); letter-spacing: -0.03em; color: var(--ink); }
.hero-stat .big small { font-size: 0.32em; letter-spacing: 0; color: var(--ink-2); font-weight: 500; margin-left: 6px; }
.hero-stat .aside { color: var(--ink-2); max-width: 44ch; font-size: 14px; }
.status-line { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 14px; }

.chip { display: inline-block; font: 600 12px/1 var(--mono); padding: 7px 10px; border-radius: 999px; border: 1px solid var(--rule); background: var(--card); color: var(--ink-2); margin: 0; }
.chip-ok { color: var(--gain); border-color: var(--gain); }
.chip-wait { color: var(--warn); border-color: var(--warn); }
.chip-bad { color: var(--bad); border-color: var(--bad); }

.grid { display: grid; gap: 14px; }
.stats { grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); }
.split { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 380px), 1fr)); margin-top: 14px; }
.split-wide { grid-template-columns: repeat(auto-fit, minmax(min(100%, 440px), 1fr)); }

.card, .stat {
  background: var(--card); border: 1px solid var(--rule); border-radius: 10px; padding: 18px; box-shadow: var(--shadow); min-width: 0;
}
.stat .k { font: 600 11px/1.2 var(--mono); text-transform: uppercase; letter-spacing: 0.1em; color: var(--ink-2); margin: 0 0 8px; }
.stat .v { font: 700 26px/1.1 var(--mono); letter-spacing: -0.02em; margin: 0; overflow-wrap: anywhere; }
.stat .n { margin: 8px 0 0; font-size: 13px; color: var(--ink-2); }
.stat.good .v { color: var(--gain); }

.facts { margin: 12px 0 0; display: grid; gap: 0; }
.facts > div { display: flex; justify-content: space-between; gap: 16px; padding: 8px 0; border-top: 1px dashed var(--rule); }
.facts dt { color: var(--ink-2); font-size: 14px; }
.facts dd { margin: 0; font: 600 14px/1.4 var(--mono); text-align: right; overflow-wrap: anywhere; min-width: 0; }
.facts dd.good { color: var(--gain); }
.facts dd.warn { color: var(--warn); }

.svg-chart, .lw-chart { width: 100%; }
.lw-chart { height: 260px; }
.svg-chart svg { display: block; width: 100%; height: auto; }
.svg-chart .axis { stroke: var(--rule); stroke-width: 1; }
.svg-chart .gridline { stroke: var(--rule); stroke-width: 1; stroke-dasharray: 3 4; }
.svg-chart .curve { fill: none; stroke: var(--accent); stroke-width: 2.5; }
.svg-chart .area { fill: var(--accent); opacity: 0.1; }
.svg-chart .marker { fill: var(--focus); stroke: var(--card); stroke-width: 2; }
.svg-chart .marker-line { stroke: var(--focus); stroke-width: 1.5; stroke-dasharray: 4 3; }
.svg-chart text { fill: var(--ink-2); font: 11px var(--mono); }
.svg-chart .marker-label { fill: var(--ink); font-weight: 700; }

.table-wrap { overflow-x: auto; margin: 10px -4px 0; padding: 0 4px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 9px 8px; border-bottom: 1px solid var(--rule); vertical-align: top; }
th { font: 600 11px/1.3 var(--mono); text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-2); }
td.num, th.num { text-align: right; font-family: var(--mono); }
td .tag { display: inline-block; font: 600 10px/1 var(--mono); padding: 3px 6px; border-radius: 4px; background: var(--paper-2); color: var(--warn); margin-left: 6px; }

.method { margin-top: 14px; border-top: 1px dashed var(--rule); padding-top: 10px; }
.method summary { cursor: pointer; font-weight: 600; padding: 4px 0; }
.method p { margin: 8px 0 0; font-size: 14px; color: var(--ink-2); }

label, .label { display: block; font-weight: 600; font-size: 14px; margin: 0 0 6px; }
input[type="text"] {
  width: 100%; min-width: 0; padding: 11px 12px; font: 16px var(--mono); color: var(--ink); background: var(--paper);
  border: 1px solid var(--rule); border-radius: 8px;
}
input[type="text"]:hover { border-color: var(--ink-2); }
input[type="text"]:focus-visible { outline-offset: 0; border-color: var(--focus); }
input[aria-invalid="true"] { border-color: var(--bad); }
.field-row { display: flex; gap: 8px; align-items: stretch; flex-wrap: wrap; }
.field-row > label { flex: 1 0 100%; margin: 0; }
.field-row > input { flex: 1 1 140px; }

.btn {
  font: 600 14px/1 var(--sans); padding: 12px 16px; border-radius: 8px; border: 1px solid var(--ink); background: var(--card); color: var(--ink);
  cursor: pointer; min-height: 44px; transition: transform 0.08s, background 0.15s, box-shadow 0.15s;
}
.btn:hover { background: var(--paper-2); box-shadow: 2px 2px 0 var(--ink); }
.btn:active { transform: translate(1px, 1px); box-shadow: none; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; box-shadow: none; transform: none; }
.btn-primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn-primary:hover { background: var(--accent); filter: brightness(1.1); box-shadow: 2px 2px 0 var(--ink); }
.btn-ghost { border-color: var(--rule); background: transparent; }

.error-text { color: var(--bad); font-size: 14px; margin: 6px 0 0; }
.error-text[hidden] { display: none; }

.providers { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; min-height: 44px; align-items: center; }
.provider { display: inline-flex; align-items: center; gap: 8px; }
.provider img { width: 20px; height: 20px; border-radius: 4px; }
.watch { margin-bottom: 14px; }
.wallet-connect { margin-bottom: 14px; }

.empty, .errorbox { border: 2px dashed var(--rule); border-radius: 10px; padding: 24px; text-align: center; color: var(--ink-2); }
.empty h3, .errorbox h3 { color: var(--ink); }
.errorbox { border-color: var(--bad); }
.errorbox .btn { margin-top: 10px; }

.actions { display: grid; gap: 18px; margin-top: 14px; }
.action { padding-top: 16px; border-top: 1px dashed var(--rule); }
.action:first-child { border-top: 0; padding-top: 0; }
.action .btn { margin-top: 10px; }
.action .muted { margin: 0; }
fieldset.seg { border: 0; padding: 0; margin: 14px 0 0; display: flex; flex-wrap: wrap; gap: 8px; }
fieldset.seg legend { font-weight: 600; font-size: 14px; padding: 0; margin-bottom: 6px; }
.seg label { display: inline-flex; margin: 0; cursor: pointer; }
.seg input { position: absolute; opacity: 0; }
.seg span { border: 1px solid var(--rule); border-radius: 8px; padding: 10px 14px; min-height: 44px; display: inline-flex; align-items: center; }
.seg input:checked + span { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.seg input:focus-visible + span { outline: 3px solid var(--focus); outline-offset: 2px; }
.seg label:hover span { border-color: var(--ink-2); }

.intent { border-top: 1px dashed var(--rule); padding: 10px 0; }
.intent:first-child { border-top: 0; padding-top: 0; }
.intent .row { display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; align-items: center; }
.intent code { font: 12px var(--mono); overflow-wrap: anywhere; color: var(--ink-2); }

dialog { border: 2px solid var(--ink); border-radius: 12px; background: var(--card); color: var(--ink); padding: 0; width: min(520px, calc(100vw - 24px)); box-shadow: 8px 8px 0 var(--ink); }
dialog::backdrop { background: rgba(10, 14, 20, 0.6); }
.dialog-body { padding: 20px; }
.dialog-actions { display: flex; flex-wrap: wrap; gap: 10px; justify-content: flex-end; margin-top: 18px; }

.skeleton { background: linear-gradient(90deg, var(--paper-2), var(--card), var(--paper-2)); background-size: 200% 100%; animation: shimmer 1.4s linear infinite; border-radius: 8px; }
.skeleton-card { height: 112px; }
.skeleton-big { height: 64px; width: min(360px, 100%); }
.skeleton-row { height: 22px; width: 100%; }
@keyframes shimmer { from { background-position: 200% 0; } to { background-position: -200% 0; } }

footer { max-width: 1120px; margin: 0 auto; padding: 24px 16px 48px; border-top: 2px solid var(--ink); font-size: 14px; color: var(--ink-2); }
footer p { margin: 0 0 10px; }
.foot-links, .foot-repos { display: flex; flex-wrap: wrap; gap: 6px 16px; }
.foot-disclaimer strong { color: var(--ink); }

[hidden] { display: none !important; }

@media (max-width: 480px) {
  .stat .v { font-size: 22px; }
  .facts > div { flex-direction: column; gap: 2px; }
  .facts dd { text-align: left; }
  .dialog-actions .btn { flex: 1 1 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .skeleton { animation: none; }
  .btn { transition: none; }
}

.claims-spark { color: var(--accent); width: 100%; height: auto; display: block; }

/* Landing: marketing sections, connect tabs, code blocks */
.top-nav .os-link { color: var(--accent); font-weight: 600; }
.cta { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0 0; }
.cta .btn { display: inline-flex; align-items: center; text-decoration: none; }
.features { grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); }
.feature p { margin: 0; color: var(--ink-2); font-size: 15px; }
.feature { transition: border-color 0.15s, transform 0.15s; }
.feature:hover { border-color: var(--accent); transform: translateY(-2px); }
.strip-title { font: 600 12px/1 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-2); margin: 0 0 12px; }
.strip { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; list-style: none; }
.strip li { font: 600 14px/1 var(--sans); padding: 10px 14px; border: 1px solid var(--rule); border-radius: 999px; background: var(--card); color: var(--ink); }
.code { position: relative; margin: 10px 0; }
.code pre { margin: 0; padding: 14px; padding-top: 38px; overflow-x: auto; background: var(--paper-2); border: 1px solid var(--rule); border-radius: 8px; font: 13px/1.55 var(--mono); }
.code pre code { background: none; padding: 0; }
.copy { position: absolute; top: 7px; right: 7px; font: 600 12px var(--sans); padding: 5px 10px; border-radius: 6px; border: 1px solid var(--rule); background: var(--card); color: var(--ink-2); cursor: pointer; }
.copy:hover { color: var(--ink); border-color: var(--ink-2); }
.copy:active { transform: translateY(1px); }
.copy[data-state="done"] { color: var(--gain); border-color: var(--gain); }
.copy[data-state="fail"] { color: var(--bad); border-color: var(--bad); }
.tablist { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.tab { font: 600 14px/1 var(--sans); padding: 10px 14px; min-height: 40px; border-radius: 8px; border: 1px solid var(--rule); background: var(--card); color: var(--ink-2); cursor: pointer; }
.tab:hover { color: var(--ink); border-color: var(--ink-2); }
.tab:active { transform: translateY(1px); }
.tab[aria-selected="true"] { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.tabpanel .small { margin: 0 0 4px; }
.tools-title { margin-top: 28px; }
.tools { list-style: none; margin: 10px 0 0; padding: 0; display: grid; gap: 8px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); }
.tools li { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 10px; padding: 12px 14px; border: 1px solid var(--rule); border-radius: 8px; background: var(--card); }
.tools code { font: 600 13px var(--mono); color: var(--accent); overflow-wrap: anywhere; }
.tools span { color: var(--ink-2); font-size: 14px; }
.tools em { margin-left: auto; font: 600 10px var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--gain); border: 1px solid var(--gain); border-radius: 999px; padding: 3px 7px; font-style: normal; }
@media (prefers-reduced-motion: reduce) { .feature { transition: none; } }

/* Embedded in Papertrade OS (?embed=1): product only, no marketing chrome */
html[data-embed] .mkt, html[data-embed] .top-nav { display: none; }
html[data-embed] .top { padding-top: 8px; padding-bottom: 0; }
html[data-embed] .hero { margin-top: 8px; padding-top: 8px; }
html[data-embed] .hero .lede, html[data-embed] .hero .eyebrow { display: none; }
html[data-embed] main { padding-bottom: 16px; }
html[data-embed] section { margin-top: 32px; }
html[data-embed] footer .foot-links a:not([href="\/docs\/"]):not([href*="github"]) { display: none; }