:root {
  --bench: #f1f4f2;
  --panel: #ffffff;
  --steel: #12262f;
  --steel-2: #24434d;
  --ink: #172024;
  --muted: #536169;
  --safety: #f2b705;
  --signal: #087b72;
  --rust: #a64022;
  --rule: #b8c4c3;
  --wash: #dce9e6;
  --shadow: 8px 8px 0 rgba(18, 38, 47, .12);
  --body-face: Arial, Helvetica, sans-serif;
  --title-face: "Arial Narrow", "Aptos Narrow", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 1.5rem; }
body {
  margin: 0;
  background:
    linear-gradient(rgba(18, 38, 47, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(18, 38, 47, .035) 1px, transparent 1px),
    var(--bench);
  background-size: 28px 28px;
  color: var(--ink);
  font: 1rem/1.62 var(--body-face);
}
a { color: #075d59; text-decoration-thickness: .1em; text-underline-offset: .18em; }
a:hover { color: var(--rust); }
a:focus-visible, summary:focus-visible, [tabindex="0"]:focus-visible {
  outline: 3px solid var(--safety);
  outline-offset: 3px;
}
.jump-link {
  position: fixed;
  z-index: 100;
  top: .5rem;
  left: .5rem;
  min-height: 44px;
  padding: .75rem 1rem;
  transform: translateY(-160%);
  background: var(--steel);
  color: #fff;
  font-weight: 800;
}
.jump-link:focus { transform: translateY(0); }

.workbench-head { background: var(--steel); color: #fff; border-bottom: 7px solid var(--safety); }
.head-inner {
  width: min(1240px, calc(100% - 2rem));
  min-height: 92px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(230px, 1fr) auto;
  align-items: center;
  gap: 1.5rem;
}
.lab-identity { display: inline-flex; align-items: center; gap: .9rem; min-height: 52px; color: #fff; text-decoration: none; }
.lab-identity img { width: 54px; height: 54px; flex: 0 0 auto; }
.lab-identity strong { display: block; font-family: var(--title-face); font-size: 1.03rem; letter-spacing: .08em; text-transform: uppercase; }
.lab-identity small { display: block; color: #c8d8d9; font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; }
.section-nav ul { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: .35rem; margin: 0; padding: 0; list-style: none; }
.section-nav a { display: inline-flex; min-height: 44px; align-items: center; padding: .5rem .7rem; color: #fff; font-size: .87rem; font-weight: 750; text-decoration: none; }
.section-nav a:hover { background: rgba(255,255,255,.1); color: #fff; }

.parts-shell {
  width: min(1240px, calc(100% - 2rem));
  margin: 2rem auto 4rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 250px;
  gap: 2rem;
  align-items: start;
}
.spec-report { min-width: 0; }
.cover-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 11rem;
  gap: 1.4rem;
  align-items: end;
  padding: clamp(1.4rem, 4vw, 3.2rem);
  border: 2px solid var(--steel);
  background: var(--panel);
  box-shadow: var(--shadow);
}
.serial { margin: 0 0 .65rem; color: var(--rust); font-size: .75rem; font-weight: 900; letter-spacing: .13em; text-transform: uppercase; }
h1, h2, h3 { font-family: var(--title-face); line-height: 1.08; }
h1 { max-width: 19ch; margin: 0; font-size: clamp(2.35rem, 6vw, 5.35rem); letter-spacing: -.035em; text-transform: uppercase; }
.cover-summary { max-width: 70ch; margin: 1rem 0 0; color: var(--muted); font-size: clamp(1.03rem, 2vw, 1.22rem); }
.byline-plate { margin: 1.25rem 0 0; padding-top: .9rem; border-top: 1px solid var(--rule); display: grid; gap: .2rem; color: var(--muted); font-size: .84rem; }
.cover-code { align-self: stretch; display: grid; place-content: center; padding: 1rem; background: var(--safety); color: var(--steel); text-align: center; }
.cover-code strong { display: block; font-size: 3.4rem; line-height: 1; }
.cover-code span { font-size: .7rem; font-weight: 900; letter-spacing: .12em; text-transform: uppercase; }

.verdict-box { margin: 2rem 0 0; border-left: .7rem solid var(--signal); padding: 1.4rem 1.5rem; background: var(--panel); box-shadow: 0 10px 28px rgba(18,38,47,.09); }
.verdict-box h2 { margin: 0 0 .7rem; font-size: 1.8rem; text-transform: uppercase; }
.verdict-box p:last-child { margin-bottom: 0; }
.boundary-strip { margin: 1rem 0 0; padding: 1rem 1.1rem; border: 1px solid #d0a54d; background: #fff6cf; font-size: .94rem; }

.chapter { margin-top: 3.3rem; }
.chapter-title { margin: 0 0 1rem; padding: 0 0 .6rem; border-bottom: 3px solid var(--steel); font-size: clamp(1.75rem, 3.5vw, 2.8rem); text-transform: uppercase; }
.chapter-intro { max-width: 76ch; color: var(--muted); }
.ranking-scroll { overflow-x: auto; border: 2px solid var(--steel); background: var(--panel); }
.ranking-scroll table { width: 100%; min-width: 990px; border-collapse: collapse; font-size: .88rem; }
.ranking-scroll caption { padding: 1rem; text-align: left; color: var(--muted); font-weight: 700; }
.ranking-scroll th, .ranking-scroll td { padding: .82rem .85rem; border-top: 1px solid var(--rule); text-align: left; vertical-align: top; }
.ranking-scroll th { background: var(--steel); color: #fff; font-size: .72rem; letter-spacing: .07em; text-transform: uppercase; }
.ranking-scroll tbody tr:nth-child(even) { background: #f4f8f7; }
.ranking-scroll .lead-provider { background: #fff5c4; }
.position-cell { width: 2.25rem; height: 2.25rem; display: inline-grid; place-items: center; border: 2px solid var(--steel); font-weight: 900; }
.provider-kind { display: inline-block; padding: .15rem .4rem; border: 1px solid var(--signal); color: #075d59; font-size: .68rem; font-weight: 900; letter-spacing: .04em; text-transform: uppercase; }

.routing-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .9rem; }
.route-card { position: relative; padding: 1.25rem 1.2rem 1.2rem 1.5rem; border: 1px solid var(--rule); background: var(--panel); }
.route-card::before { content: ""; position: absolute; inset: 0 auto 0 0; width: .38rem; background: var(--signal); }
.route-card:nth-child(2)::before { background: var(--safety); }
.route-card:nth-child(3)::before { background: var(--rust); }
.route-card:nth-child(4)::before { background: var(--steel-2); }
.route-card h3 { margin: 0 0 .55rem; font-size: 1.18rem; text-transform: uppercase; }

.evidence-rack { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .85rem; }
.evidence-bin { padding: 1.15rem; border: 1px solid var(--rule); border-top: .45rem solid var(--steel-2); background: var(--panel); }
.evidence-bin h3 { margin: .25rem 0 .55rem; font-size: 1.18rem; text-transform: uppercase; }
.evidence-label { margin: 0; color: var(--signal); font-size: .7rem; font-weight: 900; letter-spacing: .09em; text-transform: uppercase; }
.fine-gauge { color: var(--muted); font-size: .84rem; }

.method-steps { counter-reset: method; display: grid; gap: .6rem; margin: 1.2rem 0 0; padding: 0; list-style: none; }
.method-steps li { counter-increment: method; display: grid; grid-template-columns: 3.2rem 1fr; align-items: start; gap: .75rem; padding: .8rem; background: var(--panel); border-bottom: 1px solid var(--rule); }
.method-steps li::before { content: counter(method, decimal-leading-zero); color: var(--rust); font-weight: 900; }
.method-steps strong { color: var(--steel); }

.query-bay { display: grid; gap: .65rem; }
.query-bay details { border: 1px solid var(--rule); background: var(--panel); }
.query-bay summary { min-height: 52px; padding: .92rem 3rem .92rem 1rem; cursor: pointer; color: var(--steel); font-weight: 800; }
.query-bay details[open] { border-color: var(--signal); box-shadow: 5px 5px 0 var(--wash); }
.query-bay details p { margin: 0; padding: 0 1rem 1.15rem; color: #34444a; }
.sources-list { padding-left: 1.35rem; }
.sources-list li + li { margin-top: .7rem; }

.field-index { position: sticky; top: 1rem; display: grid; gap: .85rem; }
.field-card { padding: 1rem; border: 2px solid var(--steel); background: var(--panel); }
.field-card h2 { margin: 0 0 .6rem; font-size: .93rem; letter-spacing: .06em; text-transform: uppercase; }
.field-card ul { margin: 0; padding-left: 1.15rem; }
.field-card li + li { margin-top: .38rem; }
.warning-card { border-color: var(--rust); }

.workbench-foot { border-top: 7px solid var(--safety); background: var(--steel); color: #fff; }
.foot-inner { width: min(1240px, calc(100% - 2rem)); margin: 0 auto; padding: 2rem 0; display: flex; justify-content: space-between; gap: 2rem; align-items: flex-start; }
.foot-inner p { margin: .2rem 0; }
.foot-inner a { color: #fff; }

@media (max-width: 920px) {
  .parts-shell { grid-template-columns: 1fr; }
  .field-index { position: static; grid-template-columns: repeat(2, minmax(0, 1fr)); order: -1; }
  .evidence-rack { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 680px) {
  .head-inner { grid-template-columns: 1fr; padding: .8rem 0; gap: .35rem; }
  .section-nav ul { justify-content: flex-start; }
  .section-nav a { padding-left: 0; padding-right: .9rem; }
  .cover-grid { grid-template-columns: 1fr; }
  .cover-code { min-height: 110px; }
  .field-index, .routing-grid, .evidence-rack { grid-template-columns: 1fr; }
  h1 { font-size: clamp(2.15rem, 12vw, 3.55rem); }
  .foot-inner { flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }