/* chirocodes — "The Ledger". Single stylesheet, no external assets. */

:root {
  --paper: #f4eee1;
  --paper-deep: #e9e0cd;
  --sheet: #fffdf7;
  --rule: #cfdfd3;
  --rule-strong: #a9c4b1;
  --margin: #b8382c;
  --ink: #1b241f;
  --ink-body: #2b3630;
  --ink-muted: #5c6862;
  --green: #1e6b45;
  --green-deep: #14503a;
  --green-tint: #e6f1e9;
  --red: #b8382c;
  --red-tint: #fbeae7;
  --amber: #8a5a00;
  --amber-tint: #fff3d6;
  --focus: #1e6b45;
  --shadow: 0 10px 30px rgba(38, 48, 40, 0.10), 0 1px 2px rgba(38, 48, 40, 0.08);
  --radius: 0.75rem;
  --wrap: 82rem;
  --gutter: clamp(1rem, 4vw, 2.5rem);
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.55;
  color: var(--ink-body);
  background-color: var(--paper);
  background-image:
    radial-gradient(ellipse at top left, rgba(255, 255, 255, 0.6), transparent 55%),
    radial-gradient(ellipse at bottom right, rgba(120, 100, 60, 0.10), transparent 60%);
  background-attachment: fixed;
}

a { color: var(--green); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--green-deep); }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }

.skip-link {
  position: absolute; left: 1rem; top: -4rem;
  padding: 0.5rem 0.75rem; background: var(--ink); color: #fff; border-radius: 0.4rem; z-index: 50;
}
.skip-link:focus { top: 1rem; }

.wrap { width: min(100% - 2 * var(--gutter), var(--wrap)); margin-inline: auto; }
.mono { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- masthead ---------- */

.masthead { padding: 1.5rem 0 2rem; }
.masthead__top { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.brand { margin: 0; font-weight: 700; letter-spacing: 0.02em; color: var(--ink); }
.brand a { color: inherit; text-decoration: none; }
.brand a:hover { text-decoration: underline; }
.brand__mark { display: inline-block; width: 0.7em; height: 0.7em; border-radius: 2px; background: var(--green); margin-right: 0.45em; transform: rotate(45deg); }
.masthead__nav { display: flex; gap: 1rem; flex-wrap: wrap; font-size: 0.95rem; }

.masthead__hero { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 1.5rem 2rem; align-items: start; margin-top: 1.75rem; }
.eyebrow { margin: 0 0 0.5rem; font-family: var(--mono); font-size: 0.8rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--green-deep); }
.masthead__title { margin: 0; font-size: clamp(1.9rem, 4.5vw, 3.1rem); line-height: 1.08; letter-spacing: -0.02em; color: var(--ink); max-width: 20ch; }
.masthead__lede { margin: 1rem 0 0; font-size: 1.1rem; max-width: 62ch; color: var(--ink-body); }
.masthead__meta { margin: 1rem 0 0; font-size: 0.9rem; color: var(--ink-muted); }
.masthead__meta dt { display: inline; font-weight: 600; }
.masthead__meta dd { display: inline; margin: 0; }
.masthead__meta dd::after { content: ""; display: block; height: 0.2rem; }

.stamp {
  align-self: start;
  padding: 0.9rem 1.1rem;
  border: 3px double var(--red);
  border-radius: 0.4rem;
  color: var(--red);
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  line-height: 1.5;
  transform: rotate(-3deg);
  background: rgba(255, 255, 255, 0.5);
  max-width: 16rem;
}

/* ---------- notice ---------- */

.notice {
  margin: 0 0 2rem;
  padding: 1.1rem 1.25rem;
  background: var(--red-tint);
  border-left: 6px solid var(--red);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--ink);
}
.notice h2 { margin: 0 0 0.4rem; font-size: 1.05rem; color: var(--red); }
.notice p { margin: 0.35rem 0; }
.notice ul { margin: 0.4rem 0 0; padding-left: 1.2rem; }

/* ---------- sheet (ledger paper) ---------- */

.sheet {
  position: relative;
  background: var(--sheet);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: clamp(1rem, 3vw, 2rem) clamp(1rem, 3vw, 2rem) clamp(1rem, 3vw, 2rem) clamp(1.5rem, 4vw, 3rem);
  margin-bottom: 2rem;
  overflow: hidden;
}
.sheet::before {
  content: "";
  position: absolute; top: 0; bottom: 0; left: clamp(0.75rem, 2vw, 1.5rem);
  width: 0; border-left: 2px solid var(--margin); opacity: 0.55;
}
.sheet__title { margin: 0 0 0.25rem; font-size: 1.5rem; letter-spacing: -0.01em; color: var(--ink); }
.sheet__intro { margin: 0 0 1.25rem; color: var(--ink-muted); max-width: 70ch; }
.sheet__intro--tight { margin: 0.25rem 0 0; }
.sheet__intro--after { margin: 1rem 0 0; }
.sheet__sub { margin: 1.5rem 0 0; font-size: 1.1rem; color: var(--ink); }
.th-right { text-align: right; }

/* ---------- facts grid ---------- */

.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); gap: 1rem; margin: 0; padding: 0; list-style: none; }
.fact { padding: 1rem 1.1rem; border: 1px solid var(--rule); border-radius: var(--radius); background: #fff; }
.fact h3 { margin: 0 0 0.35rem; font-size: 1rem; color: var(--green-deep); }
.fact p { margin: 0; font-size: 0.95rem; }
.fact .cite { display: block; margin-top: 0.5rem; font-family: var(--mono); font-size: 0.75rem; color: var(--ink-muted); }

.cf-table { width: 100%; border-collapse: collapse; margin-top: 1rem; font-size: 0.95rem; }
.cf-table th, .cf-table td { text-align: left; padding: 0.45rem 0.6rem; border-bottom: 1px solid var(--rule); vertical-align: top; }
.cf-table th { color: var(--green-deep); font-weight: 600; }
.cf-table td.num { font-family: var(--mono); font-variant-numeric: tabular-nums; white-space: nowrap; }

/* ---------- controls ---------- */

.controls {
  position: sticky; top: 0; z-index: 10;
  margin: 0 0 1rem;
  padding: 0.85rem 1rem;
  background: rgba(255, 253, 247, 0.96);
  backdrop-filter: blur(6px);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  display: grid; gap: 0.75rem;
}
.controls__row { display: flex; gap: 0.75rem; align-items: center; flex-wrap: wrap; }
.controls label { font-weight: 600; font-size: 0.9rem; color: var(--ink); }
.search {
  flex: 1 1 18rem;
  padding: 0.6rem 0.8rem;
  font: inherit; font-size: 1rem;
  border: 1.5px solid var(--rule-strong); border-radius: 0.5rem; background: #fff; color: var(--ink);
}
.search:focus { border-color: var(--green); }
.controls select {
  font: inherit; padding: 0.55rem 0.7rem; border: 1.5px solid var(--rule-strong); border-radius: 0.5rem; background: #fff; color: var(--ink);
}
.controls .check { display: inline-flex; align-items: center; gap: 0.4rem; font-weight: 500; }
.controls .count { margin-left: auto; font-family: var(--mono); font-size: 0.85rem; color: var(--ink-muted); }
.chips { display: flex; flex-wrap: wrap; gap: 0.4rem; margin: 0; padding: 0; list-style: none; }
.chip {
  font: inherit; font-size: 0.85rem; padding: 0.3rem 0.7rem; border-radius: 999px;
  border: 1px solid var(--rule-strong); background: #fff; color: var(--ink); cursor: pointer;
}
.chip[aria-pressed="true"] { background: var(--green); border-color: var(--green); color: #fff; }
.chip:hover { border-color: var(--green); }
.no-js .controls { display: none; }

/* ---------- ledger table ---------- */

.ledger-wrap { overflow-x: auto; }
.ledger { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
.ledger caption { text-align: left; caption-side: top; font-weight: 600; color: var(--ink); padding: 0 0 0.5rem; }
.ledger th, .ledger td { text-align: left; vertical-align: top; padding: 0.7rem 0.6rem; border-bottom: 1px solid var(--rule); }
.ledger thead th {
  position: sticky; top: 0; background: var(--sheet); color: var(--green-deep); font-size: 0.8rem; letter-spacing: 0.06em; text-transform: uppercase;
  border-bottom: 2px solid var(--rule-strong);
}
.ledger tbody tr:nth-child(even) { background: rgba(230, 241, 233, 0.35); }
.ledger tbody tr:hover { background: var(--green-tint); }
.ledger tbody tr[hidden] { display: none; }
.ledger .cat-row th {
  background: var(--paper-deep); color: var(--ink); font-size: 0.85rem; letter-spacing: 0.04em; text-transform: uppercase; padding: 0.55rem 0.6rem;
  border-bottom: 1px solid var(--rule-strong);
}
.ledger .cat-row[hidden] { display: none; }
.code { font-family: var(--mono); font-weight: 700; font-size: 1rem; color: var(--ink); white-space: nowrap; }
.code small { display: block; font-weight: 400; font-size: 0.7rem; color: var(--ink-muted); letter-spacing: 0.06em; }
.desc { min-width: 14rem; }
.units { min-width: 8rem; color: var(--ink-body); font-size: 0.9rem; }
.fee { font-family: var(--mono); font-variant-numeric: tabular-nums; white-space: nowrap; text-align: right; color: var(--ink); }
.fee .fee__main { font-weight: 700; font-size: 1.02rem; }
.fee .fee__sub { display: block; font-size: 0.78rem; color: var(--ink-muted); font-weight: 400; }
.fee .fee__basis { display: block; font-size: 0.72rem; color: var(--amber); font-family: var(--font); white-space: normal; max-width: 12rem; margin-left: auto; }
.fee--none { color: var(--ink-muted); font-weight: 400; }
.req { min-width: 20rem; max-width: 40rem; }
.req details { margin-top: 0.4rem; }
.req summary { cursor: pointer; color: var(--green); font-weight: 600; font-size: 0.88rem; }
.req details ul { margin: 0.4rem 0 0; padding-left: 1.1rem; font-size: 0.9rem; }
.req details li { margin: 0.2rem 0; }
.req details li b { color: var(--green-deep); }
.flag { display: inline-block; margin: 0.35rem 0.3rem 0 0; padding: 0.1rem 0.5rem; border-radius: 999px; font-size: 0.72rem; font-weight: 600; letter-spacing: 0.03em; }
.flag--scope { background: var(--amber-tint); color: var(--amber); }
.flag--wc { background: var(--green-tint); color: var(--green-deep); }
.flag--bundle { background: #eef0f8; color: #3b4a8a; }
.flag--verify { background: var(--red-tint); color: var(--red); }

.empty { padding: 1.5rem 0.6rem; color: var(--ink-muted); }
.empty[hidden] { display: none; }

/* ---------- simple tables (OSC, exclusions) ---------- */

.simple { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
.simple th, .simple td { text-align: left; vertical-align: top; padding: 0.6rem; border-bottom: 1px solid var(--rule); }
.simple thead th { color: var(--green-deep); font-size: 0.8rem; letter-spacing: 0.06em; text-transform: uppercase; border-bottom: 2px solid var(--rule-strong); }
.simple td.fee { text-align: right; }

.excluded { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.6rem; }
.excluded li { padding: 0.75rem 1rem; border-left: 4px solid var(--red); background: var(--red-tint); border-radius: 0 0.5rem 0.5rem 0; }
.excluded b { color: var(--red); }

/* ---------- sources & footer ---------- */

.sources ol { padding-left: 1.4rem; margin: 0; font-size: 0.92rem; }
.sources li { margin: 0.3rem 0; overflow-wrap: anywhere; }

.footer { margin-top: auto; padding: 2rem 0 2.5rem; color: var(--ink-muted); font-size: 0.9rem; }
.footer__inner { display: grid; gap: 0.5rem; }
.footer__brand { margin: 0; font-weight: 700; color: var(--ink); }
.footer p { margin: 0; }

/* ---------- responsive ---------- */

@media (max-width: 60rem) {
  .masthead__hero { grid-template-columns: 1fr; }
  .stamp { transform: rotate(-1.5deg); }
}

@media (max-width: 48rem) {
  .ledger thead { display: none; }
  .ledger, .ledger tbody, .ledger tr, .ledger td { display: block; }
  .ledger .cat-row th { display: block; }
  .ledger tbody tr { padding: 0.75rem 0; border-bottom: 2px solid var(--rule-strong); }
  .ledger td { border: 0; padding: 0.25rem 0.4rem; }
  .ledger td::before { content: attr(data-label); display: block; font-size: 0.7rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--green-deep); }
  .ledger td.code::before { display: none; }
  .fee { text-align: left; }
  .fee .fee__basis { margin-left: 0; }
  .req, .desc { min-width: 0; }
  .controls { position: static; }
}

@media print {
  body { background: #fff; }
  .controls, .skip-link, .masthead__nav { display: none; }
  .sheet { box-shadow: none; }
  .ledger tbody tr[hidden] { display: none; }
}