:root {
  --ink: #0e1116;
  --paper: #f6f5f1;
  --card: #fffefb;
  --blue: #2436c4;
  --blue-dark: #1a2794;
  --amber: #8a5606;
  --amber-wash: #f6ecda;
  --slate: #5b6167;
  --rule: #d8d4c8;
  --rule-dark: #a9a396;
  --wash: #eeece5;
  --green: #1f5c3d;
  --red: #8f2019;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.62;
}
h1, h2, h3, h4 { font-weight: 800; letter-spacing: -0.02em; line-height: 1.12; margin: 0 0 14px; }
h1 { font-size: clamp(34px, 5.2vw, 62px); }
h2 { font-size: clamp(26px, 3.2vw, 38px); }
h3 { font-size: 19px; letter-spacing: -0.01em; line-height: 1.28; }
p { margin: 0 0 14px; }
ul, ol { margin: 0 0 14px; padding-left: 20px; }
li { margin: 6px 0; }
a { color: var(--blue); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--ink); }
img { max-width: 100%; height: auto; display: block; }
code, .mono { font-family: var(--mono); font-size: 1em; }
hr { border: 0; border-top: 1px solid var(--rule); margin: 28px 0; }
.wrap { max-width: 1140px; margin: 0 auto; padding: 0 22px; }
.skip { position: absolute; left: -9999px; top: 0; background: var(--ink); color: #fff; padding: 12px 16px; z-index: 60; }
.skip:focus { left: 10px; top: 10px; }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 2px; }

/* masthead: thin, status chip, no colour band */
.mast { border-bottom: 2px solid var(--ink); background: var(--paper); }
.mast .wrap { display: flex; align-items: center; gap: 18px; justify-content: space-between; flex-wrap: wrap; padding-top: 12px; padding-bottom: 12px; }
.brand { display: flex; align-items: baseline; gap: 10px; text-decoration: none; color: var(--ink); }
.brand .fig { font-family: var(--mono); font-weight: 700; font-size: 18px; border: 2px solid var(--ink); padding: 2px 7px; }
.brand .txt { font-weight: 800; font-size: 17px; letter-spacing: -0.01em; }
.brand .sub { display: block; font-size: 14px; font-weight: 500; color: var(--slate); letter-spacing: 0.02em; }
nav.main { display: flex; gap: 4px; flex-wrap: wrap; align-items: center; }
nav.main a { display: inline-block; padding: 12px 9px; font-size: 15px; color: var(--ink); text-decoration: none; border-bottom: 3px solid transparent; }
nav.main a:hover, nav.main a[aria-current="page"] { border-bottom-color: var(--blue); }
.chip { font-family: var(--mono); font-size: 14px; letter-spacing: 0.06em; text-transform: uppercase; border: 1px solid var(--rule-dark); padding: 5px 9px; color: var(--slate); background: var(--card); }

/* hero */
.hero { background: var(--ink); color: #fff; padding: 46px 0 0; }
.hero a { color: #cfd4ff; }
.hero-grid { display: grid; grid-template-columns: 1.35fr 0.65fr; gap: 40px; align-items: end; padding-bottom: 38px; }
.eyebrow { font-family: var(--mono); font-size: 14px; letter-spacing: 0.14em; text-transform: uppercase; color: #b9c0ff; margin: 0 0 16px; }
.hero h1 { color: #fff; max-width: 20ch; }
.hero .lede { font-size: clamp(18px, 1.8vw, 21px); line-height: 1.5; color: #dcdfe6; max-width: 60ch; }
.hero .price { font-family: var(--mono); font-size: 15px; letter-spacing: 0.01em; border-top: 1px solid #3a4048; border-bottom: 1px solid #3a4048; padding: 11px 0; margin: 20px 0; color: #fff; }
.record-card { background: var(--card); color: var(--ink); border: 2px solid #fff; padding: 18px 18px 12px; }
.record-card h2 { font-size: 14px; font-family: var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--slate); font-weight: 600; margin-bottom: 10px; }
.record-card dl { display: grid; grid-template-columns: auto 1fr; gap: 5px 14px; margin: 0; font-size: 15px; }
.record-card dt { color: var(--slate); font-size: 14px; }
.record-card dd { margin: 0; font-family: var(--mono); font-size: 14px; font-weight: 600; }
.record-card .big { font-size: 44px; line-height: 1; letter-spacing: -0.03em; font-family: var(--mono); font-weight: 700; }
.record-card .note { font-size: 14px; color: var(--slate); margin: 10px 0 6px; }
.photo-strip { position: relative; }
.photo-strip img { width: 100%; aspect-ratio: 16 / 6.4; object-fit: cover; object-position: center 32%; filter: saturate(0.92); }
.photo-strip .credit { font-size: 14px; color: #c3c8d0; background: var(--ink); padding: 7px 0; margin: 0; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-top: 8px; }
.btn { display: inline-block; background: var(--blue); color: #fff; text-decoration: none; font-weight: 700; padding: 13px 20px; border: 1px solid var(--blue); min-height: 44px; font-size: 16px; }
.btn:hover { background: var(--blue-dark); color: #fff; }
.btn.alt { background: transparent; color: var(--ink); border-color: var(--ink); }
.btn.alt:hover { background: var(--ink); color: #fff; }
.btn.on-dark { background: #fff; color: var(--ink); border-color: #fff; }
.btn.on-dark:hover { background: #dcdfe6; color: var(--ink); }

/* spine and sections */
main { display: block; }
.band { padding: 50px 0; border-bottom: 1px solid var(--rule); }
.band.wash { background: var(--wash); }
.band.ink { background: var(--ink); color: #fff; }
.band.ink a { color: #cfd4ff; }
.shell { display: grid; grid-template-columns: 190px 1fr; gap: 46px; align-items: start; }
.spine { position: sticky; top: 20px; border-top: 3px solid var(--ink); padding-top: 10px; }
.spine .n { font-family: var(--mono); font-size: 40px; line-height: 1; font-weight: 700; letter-spacing: -0.04em; }
.spine .lbl { font-family: var(--mono); font-size: 14px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--slate); margin-top: 6px; }
.spine p { font-size: 14px; color: var(--slate); margin-top: 12px; }
.body-col { min-width: 0; }
.kicker { font-family: var(--mono); font-size: 14px; letter-spacing: 0.13em; text-transform: uppercase; color: var(--amber); margin: 0 0 10px; }
.hero .kicker { color: #e8b06a; }
.lede { font-size: 19px; line-height: 1.55; color: #2c3238; max-width: 66ch; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.panel { background: var(--card); border: 1px solid var(--rule); padding: 20px; }
.panel h3 { margin-bottom: 8px; }
.panel p:last-child, .panel ul:last-child { margin-bottom: 0; }
.note { font-size: 15px; color: var(--slate); }
.small { font-size: 14px; }
main a, footer a, .crumb a, .side a { display: inline-block; padding: 4px 0; min-height: 24px; }
.tag { display: inline-block; font-family: var(--mono); font-size: 14px; letter-spacing: 0.06em; text-transform: uppercase; padding: 3px 7px; border: 1px solid currentColor; color: var(--slate); }
.tag.blue { color: var(--blue); }
.tag.amber { color: var(--amber); }
.tag.green { color: var(--green); }

/* tables */
.tablewrap { overflow-x: auto; border: 1px solid var(--rule); background: var(--card); }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
caption { text-align: left; font-size: 14px; color: var(--slate); padding: 12px 14px; border-bottom: 1px solid var(--rule); }
th, td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--rule); vertical-align: top; }
th { font-size: 14px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--slate); background: var(--wash); font-weight: 600; }
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover td { background: #faf9f4; }

/* stage ladder */
.ladder { list-style: none; padding: 0; margin: 0; border-left: 2px solid var(--rule-dark); }
.ladder li { position: relative; padding: 0 0 16px 20px; margin: 0; display: grid; grid-template-columns: 62px 110px 1fr; gap: 10px; font-size: 15px; }
.ladder li::before { content: ""; position: absolute; left: -6px; top: 8px; width: 10px; height: 10px; background: var(--paper); border: 2px solid var(--rule-dark); border-radius: 50%; }
.ladder li.done::before { background: var(--green); border-color: var(--green); }
.ladder li.current::before { background: var(--blue); border-color: var(--blue); box-shadow: 0 0 0 4px rgba(36,54,196,.14); }
.ladder .code { font-family: var(--mono); font-weight: 700; }
.ladder .date { font-family: var(--mono); color: var(--slate); font-size: 14px; white-space: nowrap; }
.ladder .state { font-size: 14px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--slate); }

/* unit folio */
.folio { display: grid; grid-template-columns: 1fr 290px; gap: 42px; align-items: start; }
.codeplate { font-family: var(--mono); font-size: clamp(40px, 7vw, 72px); line-height: 0.95; font-weight: 700; letter-spacing: -0.05em; margin: 0; }
.unit-head { border-bottom: 3px solid var(--ink); padding-bottom: 18px; margin-bottom: 26px; }
.unit-head .meta { font-size: 14px; color: var(--slate); margin: 8px 0 0; }
.answer { font-size: 21px; line-height: 1.5; border-left: 4px solid var(--blue); padding-left: 18px; margin: 0 0 26px; }
.ledger { display: grid; grid-template-columns: 170px 1fr; border-top: 1px solid var(--rule); }
.ledger dt { font-size: 14px; font-family: var(--mono); text-transform: uppercase; letter-spacing: 0.07em; color: var(--slate); padding: 16px 14px 16px 0; border-bottom: 1px solid var(--rule); }
.ledger dd { margin: 0; padding: 16px 0; border-bottom: 1px solid var(--rule); min-width: 0; }
.ledger dd ul { margin: 0; }
.side { background: var(--card); border: 1px solid var(--rule); padding: 18px; position: sticky; top: 20px; }
.side h2 { font-size: 14px; font-family: var(--mono); text-transform: uppercase; letter-spacing: 0.1em; color: var(--slate); font-weight: 600; }
.side ul { padding-left: 16px; font-size: 15px; }
.crumb { font-size: 14px; color: var(--slate); margin: 0 0 12px; }
.crumb a { color: var(--slate); }
.pager { display: flex; justify-content: space-between; gap: 16px; border-top: 1px solid var(--rule); padding-top: 16px; margin-top: 30px; font-size: 15px; }

/* check form */
.check { background: var(--card); border: 1px solid var(--rule); padding: 22px; }
.check h2 { font-size: 24px; }
fieldset { border: 1px solid var(--rule); padding: 14px 16px; margin: 0 0 16px; }
legend { font-weight: 700; font-size: 16px; padding: 0 6px; }
.radio { display: flex; gap: 10px; align-items: flex-start; padding: 8px 0; font-size: 16px; min-height: 32px; }
.radio input { margin-top: 2px; width: 24px; height: 24px; min-width: 24px; flex: 0 0 24px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-weight: 700; font-size: 16px; margin-bottom: 6px; }
.field input, .field select { width: 100%; font-size: 16px; padding: 11px 12px; border: 1px solid var(--rule-dark); background: #fff; min-height: 44px; }
.hint { font-size: 14px; color: var(--slate); margin: 6px 0 0; }
.verdict { margin-top: 22px; border: 2px solid var(--ink); background: var(--card); padding: 20px; }
.verdict-word { font-family: var(--mono); font-size: 14px; letter-spacing: 0.12em; text-transform: uppercase; margin: 0 0 8px; color: var(--amber); }
.verdict h3 { font-size: 24px; }
.verdict .rule { font-size: 14px; color: var(--slate); border-top: 1px solid var(--rule); padding-top: 12px; margin: 12px 0 0; }
.verdict.ready .verdict-word { color: var(--green); }
.verdict.stop .verdict-word { color: var(--red); }
.disclaimer { font-size: 14px; color: var(--slate); margin-top: 14px; }
.error { color: var(--red); font-size: 15px; font-weight: 700; }

/* faq */
.faq details { border-bottom: 1px solid var(--rule); padding: 14px 0; }
.faq summary { font-weight: 700; font-size: 17px; cursor: pointer; padding: 4px 0; min-height: 32px; }
.faq p { margin: 10px 0 0; }

/* footer */
footer { background: var(--ink); color: #d4d8de; padding: 42px 0 26px; font-size: 15px; }
footer h2 { font-size: 14px; font-family: var(--mono); text-transform: uppercase; letter-spacing: 0.12em; color: #fff; }
footer a { color: #cfd4ff; }
footer .cols { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 30px; }
footer ul { list-style: none; padding: 0; }
footer li { margin: 7px 0; }
footer .fine { border-top: 1px solid #343a42; margin-top: 24px; padding-top: 16px; font-size: 14px; color: #aab0b8; }
footer .fine p { margin: 0; }

/* provenance strip (R-051) */
.provenance { font-size: 14px; color: var(--slate); border-top: 1px solid var(--rule); margin-top: 18px; padding-top: 12px; }

/* grounding */
.trustnote { font-size: 15px; color: #dcdfe6; border-left: 3px solid #7f8cff; padding-left: 12px; margin: 14px 0 0; max-width: 62ch; }
.badges { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 0; }
.badge { font-size: 14px; border: 1px solid #4a515b; padding: 5px 9px; color: #e7e9ee; }
.groundband { border-top: 3px solid var(--ink); padding-top: 18px; }

@media (max-width: 1000px) {
  .hero-grid { grid-template-columns: 1fr; }
  .record-card { max-width: 420px; }
  .folio { grid-template-columns: 1fr; }
  .side { position: static; }
  .shell { grid-template-columns: 1fr; gap: 20px; }
  .spine { position: static; display: flex; gap: 14px; align-items: baseline; border-top-width: 3px; }
  .spine .n { font-size: 30px; }
  .spine p { display: none; }
}
@media (max-width: 760px) {
  body { font-size: 17px; }
  .brand .sub { display: none; }
  .mast .wrap { gap: 6px; padding-top: 8px; padding-bottom: 8px; }
  nav.main { width: 100%; gap: 0; }
  nav.main a { padding: 10px 10px 10px 0; font-size: 15px; }
  .chip { font-size: 14px; padding: 4px 8px; }
  .hero h1 { font-size: clamp(30px, 9.2vw, 40px); }
  .hero .lede { font-size: 17px; }
  .grid2, .grid3, footer .cols { grid-template-columns: 1fr; }
  .ledger { grid-template-columns: 1fr; }
  .ledger dt { padding: 14px 0 0; border-bottom: 0; }
  .ledger dd { padding: 6px 0 16px; }
  .ladder li { grid-template-columns: 54px 1fr; gap: 4px 10px; }
  .ladder li .code { grid-column: 1; grid-row: 1; }
  .ladder li .date { grid-column: 2; grid-row: 1; }
  .ladder li .what { grid-column: 1 / -1; grid-row: 2; }
  .ladder li .state { grid-column: 2; }
  .hide-mobile { display: none !important; }
  .photo-strip img { aspect-ratio: 16 / 9; }
  .hero { padding-top: 30px; }
  .band { padding: 36px 0; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}