:root {
  --bg: #e8eef4;
  --bg2: #dde5ee;
  --ink: #12151c;
  --muted: #5a6472;
  --line: #c5d0dc;
  --paper: #f6f8fb;
  --paper2: #ffffff;
  --accent: #3b5bdb;
  --accent-ink: #f7f9ff;
  --good: #0f7a4a;
  --bad: #b42318;
  --warn: #9a6700;
  --mono: "IBM Plex Mono", "ui-monospace", "Cascadia Mono", Consolas, monospace;
  --sans: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --max: 1120px;
}

* { box-sizing: border-box }
html, body { margin: 0; padding: 0 }
html { scroll-behavior: smooth; overflow-y: scroll }
body {
  font-family: var(--sans);
  color: var(--ink);
  background:
    radial-gradient(900px 480px at 92% -8%, color-mix(in srgb, var(--accent) 18%, transparent), transparent 58%),
    radial-gradient(700px 380px at -4% 12%, color-mix(in srgb, var(--accent) 8%, transparent), transparent 55%),
    repeating-linear-gradient(0deg, transparent, transparent 47px, color-mix(in srgb, var(--ink) 3.5%, transparent) 48px),
    var(--bg);
  min-height: 100vh;
  line-height: 1.5;
}
img { max-width: 100%; height: auto }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px }
a:hover { color: var(--ink) }
button, input, select, textarea { font: inherit }

.rail {
  position: fixed; inset: 0 auto 0 0; width: 10px;
  background: var(--accent); z-index: 40;
}
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 22px 80px }

.top {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding: 18px 0 8px; min-height: 78px;
}
.brand { display: flex; align-items: center; gap: 12px; color: inherit; text-decoration: none }
.mark {
  width: 42px; height: 42px; flex: 0 0 auto; display: block;
}
.mark svg { width: 100%; height: 100%; display: block }
.brand-name { font-weight: 750; letter-spacing: -0.03em; font-size: 17px; line-height: 1.1 }
.brand-name small { display: block; font-weight: 500; color: var(--muted); letter-spacing: 0; font-size: 12px }
.nav { display: flex; gap: 16px; align-items: center; flex-wrap: wrap }
.nav a { color: var(--muted); text-decoration: none; font-size: 14px }
.nav a:hover { color: var(--ink) }
.lang { position: relative }
.lang summary {
  list-style: none; cursor: pointer; font-size: 13px; color: var(--muted);
  border: 1px solid var(--line); background: var(--paper); padding: 6px 10px; border-radius: 999px;
}
.lang summary::-webkit-details-marker { display: none }
.lang ul {
  position: absolute; right: 0; margin: 6px 0 0; padding: 8px;
  background: var(--paper2); border: 1px solid var(--line); border-radius: 10px;
  list-style: none; min-width: 160px; max-height: 280px; overflow: auto; z-index: 20;
  display: grid; grid-template-columns: 1fr 1fr; gap: 2px;
}
.lang a { display: block; padding: 4px 8px; border-radius: 6px; text-decoration: none; color: var(--ink); font-size: 13px }
.lang a:hover, .lang a.is-on { background: color-mix(in srgb, var(--accent) 16%, white) }

.hero { padding: 28px 0 8px; min-height: 168px }
.kicker {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--muted); margin-bottom: 10px;
}
.kicker::before { content: ""; width: 18px; height: 2px; background: var(--accent) }
h1 {
  font-size: clamp(34px, 6vw, 62px); line-height: 0.94; letter-spacing: -0.045em;
  margin: 0 0 14px; font-weight: 800; max-width: 18ch;
}
.lede { font-size: 18px; color: var(--muted); max-width: 52ch; margin: 0 0 18px }

.sisters { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 18px }
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 10px; border: 1px solid var(--line); background: var(--paper);
  color: var(--ink); text-decoration: none; font-size: 13px; border-radius: 999px;
}
.chip:hover, .chip.is-on { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, var(--paper)) }
.chip small { color: var(--muted); font-family: var(--mono); font-size: 10px }

.stage {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 18px;
  position: relative;
}
.stage::before, .stage::after {
  content: ""; position: absolute; width: 18px; height: 18px; border: 2px solid var(--accent);
}
.stage::before { top: -1px; left: -1px; border-right: 0; border-bottom: 0 }
.stage::after { right: -1px; bottom: -1px; border-left: 0; border-top: 0 }

.panel { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 16px }
.panel-in, .panel-out {
  background: var(--paper2); border: 1px solid var(--line); padding: 16px;
  min-height: 520px;
}
.panel-out {
  overflow: auto;
  max-height: 520px;
  contain: layout;
}

label, .field label {
  display: block; font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--muted); font-family: var(--mono); margin-bottom: 6px;
}
textarea, input[type="text"], input[type="number"], select {
  width: 100%; border: 1px solid var(--line); background: var(--paper);
  padding: 10px 12px; border-radius: 0; color: var(--ink);
}
textarea { min-height: 148px; resize: vertical; font-family: var(--mono); font-size: 14px }
.hint { margin: 8px 0 0; color: var(--muted); font-size: 13px }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 12px }
.row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 10px; margin-top: 12px }
.stack { display: flex; flex-direction: column; gap: 12px }
.actions { margin-top: 14px; display: flex; gap: 8px; flex-wrap: wrap }
.btn {
  appearance: none; border: 0; cursor: pointer; padding: 11px 16px;
  background: var(--ink); color: var(--paper); font-weight: 700; letter-spacing: -0.02em;
}
.btn:disabled { opacity: .4; cursor: not-allowed }
.btn-accent { background: var(--accent); color: var(--accent-ink) }
.btn-ghost { background: transparent; color: var(--ink); border: 1px solid var(--line) }
.btn-tiny { padding: 7px 10px; font-weight: 650; font-size: 13px }

.keys { display: flex; flex-wrap: wrap; gap: 6px; margin: 10px 0 4px }
.key {
  appearance: none; border: 1px solid var(--line); background: var(--paper);
  padding: 6px 9px; cursor: pointer; font-family: var(--mono); font-size: 12px;
}
.key:hover { border-color: var(--accent); color: var(--accent) }

.empty { color: var(--muted); margin: 28px 8px; font-size: 15px }
.err { color: var(--bad); font-weight: 650; margin: 0 0 10px }
.ok { color: var(--good) }
.muted { color: var(--muted) }

.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 8px }
.stat {
  border: 1px solid var(--line); padding: 10px 12px; background: var(--paper);
}
.stat.is-main {
  grid-column: 1 / -1;
  background: color-mix(in srgb, var(--accent) 12%, var(--paper2));
  border-color: color-mix(in srgb, var(--accent) 45%, var(--line));
}
.stat .k { font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted) }
.stat .v { font-size: 28px; font-weight: 800; letter-spacing: -0.04em; line-height: 1.15; margin-top: 2px }
.stat.is-main .v { font-size: clamp(36px, 5vw, 52px) }

.steps { margin: 16px 0 0; padding: 0; }
.steps h3 { margin: 0 0 8px; font-size: 14px }
.steps ol { margin: 0; padding-left: 18px; color: #333a46; font-size: 14px }
.steps li { margin: 6px 0 }
.sorted { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px }
.pill {
  font-family: var(--mono); font-size: 12px; padding: 4px 8px;
  border: 1px solid var(--line); background: var(--paper);
}
.pill.is-mid { background: var(--accent); color: var(--accent-ink); border-color: var(--accent) }
.pill.is-out { border-color: var(--warn); color: var(--warn) }

.tex { font-size: 20px; overflow-x: auto; padding: 8px 0; min-height: 2.6em }
.subtex { color: var(--muted); font-size: 14px; margin-top: 6px }
.plot {
  width: 100%; height: 180px; display: block; margin-top: 12px;
  background: var(--paper); border: 1px solid var(--line);
  aspect-ratio: 16 / 6;
}

.table-wrap { overflow: auto; margin-top: 12px; max-height: 320px; border: 1px solid var(--line) }
table { width: 100%; border-collapse: collapse; font-size: 13px }
th, td { text-align: left; padding: 7px 8px; border-bottom: 1px solid var(--line); white-space: nowrap }
th { font-family: var(--mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); position: sticky; top: 0; background: var(--paper) }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums }

.debt-head, .debt-row {
  display: grid; grid-template-columns: 1.2fr 1fr 0.8fr 1fr auto; gap: 8px; align-items: end;
  margin-bottom: 8px;
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px }

.note {
  margin-top: 12px; font-size: 13px; color: var(--muted);
  display: flex; gap: 8px; align-items: baseline;
}
.note strong { color: var(--ink); font-weight: 700 }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 36px }
.step, .card {
  background: color-mix(in srgb, var(--paper) 80%, transparent);
  border: 1px solid var(--line); padding: 16px 16px 18px;
}
.step .n { font-family: var(--mono); color: var(--accent); font-size: 12px }
.step h3, .card h3 { margin: 6px 0 6px; font-size: 16px; letter-spacing: -0.02em }
.step p, .card p { margin: 0; color: var(--muted); font-size: 14px }

.hub { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 8px 0 16px }
.hub a, .cat-card {
  display: block; padding: 16px; background: var(--paper); border: 1px solid var(--line);
  text-decoration: none; color: inherit;
}
.hub a:hover, .cat-card:hover { border-color: var(--accent) }
.hub small, .cat-card small { display: block; color: var(--muted); font-family: var(--mono); font-size: 11px; margin-bottom: 4px }
.hub strong, .cat-card strong { font-size: 18px; letter-spacing: -0.03em }
.cat { margin: 28px 0 }
.cat h2 { margin: 0 0 12px; font-size: 22px; letter-spacing: -0.03em }
.cat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px }

.result-bar { display: flex; justify-content: flex-end; margin-bottom: 8px }
.insights { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 4px }
.insight {
  font-size: 13px; border: 1px solid var(--line); background: var(--paper); padding: 8px 10px;
}
.insight strong { display: block; font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); font-family: var(--mono); font-weight: 500 }
.insight.warn { border-color: color-mix(in srgb, var(--warn) 45%, var(--line)); }
.examples { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0 0; min-height: 28px }
.examples button {
  appearance: none; border: 1px solid var(--line); background: var(--paper); padding: 4px 8px;
  cursor: pointer; font-family: var(--mono); font-size: 12px;
}
.examples button:hover { border-color: var(--accent); color: var(--accent) }
.hist {
  display: flex; align-items: flex-end; gap: 3px; height: 72px; margin: 12px 0 4px;
}
.hist i {
  flex: 1; background: color-mix(in srgb, var(--accent) 70%, #fff); display: block; min-height: 4px;
}
.spark { width: 100%; height: 76px; display: block; margin: 10px 0 2px; border: 1px solid var(--line); background: var(--paper) }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 10px }
.split .bar {
  height: 8px; background: var(--line); display: flex; overflow: hidden;
}
.split .bar > b { display: block; height: 100%; background: var(--accent) }
.split .bar > i { display: block; height: 100%; background: var(--ink); opacity: .45 }

.cta {
  margin: 28px 0 8px; padding: 16px 18px;
  border: 1px solid color-mix(in srgb, var(--accent) 40%, var(--line));
  background: color-mix(in srgb, var(--accent) 10%, var(--paper));
}
.cta p { margin: 0 0 10px; color: #333a46 }
.more-nav { margin: 28px 0 0; grid-template-columns: repeat(4, 1fr) }
.cat-card.is-on { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 8%, var(--paper)) }
.prose ul { padding-left: 20px }
.prose code { font-family: var(--mono); font-size: 0.92em }
.prose h2 { margin: 0 0 12px; font-size: 28px; letter-spacing: -0.03em }
.prose h3 { margin: 22px 0 8px; font-size: 18px }
.prose p, .prose li { color: #333a46 }
.faq details { border-top: 1px solid var(--line); padding: 10px 0 }
.faq summary { cursor: pointer; font-weight: 700 }
.faq p { margin: 8px 0 0 }

.legal { max-width: 720px; margin: 40px auto; padding: 0 22px 80px }
.legal h1 { font-size: 36px; max-width: none }
.foot {
  max-width: var(--max); margin: 0 auto; padding: 24px 22px 40px;
  color: var(--muted); font-size: 13px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  border-top: 1px solid var(--line);
}
.ad-slot {
  margin: 16px 0;
  overflow: hidden;
  contain: layout;
  overflow-anchor: none;
}
.ad-slot[id^="ezoic-pub-ad-placeholder-101"],
.ad-slot-top {
  min-height: 90px;
}
.ad-slot[id^="ezoic-pub-ad-placeholder-107"],
.ad-slot-mid {
  min-height: 250px;
}
#rows { min-height: 168px }
.crumb { font-size: 13px; color: var(--muted); margin: 8px 0 0 }
.crumb a { color: var(--muted); text-decoration: none }
.crumb a:hover { color: var(--accent) }

@media (max-width: 860px) {
  .rail { width: 6px }
  .panel, .grid-3, .hub, .form-grid, .row, .row-3, .stats, .debt-head, .debt-row, .split {
    grid-template-columns: 1fr;
  }
  .cat-grid, .more-nav {
    grid-template-columns: 1fr 1fr;
  }
  .panel-in, .panel-out { min-height: 420px }
  .panel-out { max-height: 70vh }
  .hero { min-height: 0 }
  .top { min-height: 0 }
  .ad-slot[id^="ezoic-pub-ad-placeholder-101"],
  .ad-slot-top { min-height: 50px }
  .debt-head { display: none }
  h1 { max-width: none }
}