/* VisibilityBench design tokens
   Palette: test-lab report. Cool paper, slate ink, highlighter mark, verdict green.
   Type: Archivo (display), Source Serif 4 (body), IBM Plex Mono (data). */

:root {
  --paper: #F7F8F6;
  --panel: #FFFFFF;
  --ink: #1A2229;
  --ink-soft: #4A5661;
  --mark: #FFDE59;
  --green: #157A55;
  --red: #B3402F;
  --amber: #B07A18;
  --rule: #D9DED9;
  --mono-bg: #EDF0EC;

  --font-display: "Archivo", system-ui, sans-serif;
  --font-body: "Source Serif 4", Georgia, serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;

  --max: 1060px;
  --max-prose: 680px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.075rem;
  line-height: 1.65;
}

a { color: inherit; }
a:focus-visible, button:focus-visible {
  outline: 3px solid var(--ink);
  outline-offset: 2px;
}

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 22px; }

/* Header */
.site-header {
  border-bottom: 2px solid var(--ink);
  background: var(--paper);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding-top: 16px;
  padding-bottom: 16px;
  flex-wrap: wrap;
}
.wordmark {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.3rem;
  letter-spacing: -0.02em;
  text-decoration: none;
}
.wordmark .tick { color: var(--green); }
.site-nav { display: flex; gap: 20px; flex-wrap: wrap; }
.site-nav a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  padding-bottom: 2px;
}
.site-nav a:hover, .site-nav a[aria-current="page"] { border-bottom-color: var(--mark); }

/* Hero */
.hero { padding: 64px 0 48px; }
.hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 5.4vw, 3.4rem);
  line-height: 1.06;
  letter-spacing: -0.025em;
  max-width: 17ch;
}
.hero h1 .hl {
  background: linear-gradient(transparent 58%, var(--mark) 58%, var(--mark) 92%, transparent 92%);
}
.hero p {
  margin-top: 22px;
  max-width: 56ch;
  font-size: 1.15rem;
  color: var(--ink-soft);
}
.hero p strong { color: var(--ink); }

/* Ledger: the signature element */
.ledger { padding: 8px 0 56px; }
.ledger-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 2px solid var(--ink);
  padding-bottom: 8px;
  flex-wrap: wrap;
}
.ledger-head h2 {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.ledger-head .stamp {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-soft);
}
.ledger table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}
.ledger th {
  text-align: left;
  font-weight: 600;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  padding: 12px 14px 8px 0;
  border-bottom: 1px solid var(--rule);
}
.ledger td {
  padding: 12px 14px 12px 0;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}
.ledger td a { text-decoration-color: var(--mark); text-decoration-thickness: 2px; }
.chip {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 2px 8px;
  border-radius: 3px;
  white-space: nowrap;
}
.chip.live { background: #E2F0E9; color: var(--green); }
.chip.planned { background: var(--mono-bg); color: var(--ink-soft); }
.chip.done { background: var(--ink); color: var(--paper); }

/* Article cards */
.section-label {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border-bottom: 2px solid var(--ink);
  padding-bottom: 8px;
  margin-bottom: 24px;
}
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  padding-bottom: 56px;
}
.card {
  background: var(--panel);
  border: 1px solid var(--rule);
  border-top: 3px solid var(--ink);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.card .kicker {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}
.card h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  line-height: 1.2;
  letter-spacing: -0.01em;
}
.card h3 a { text-decoration: none; }
.card h3 a:hover { background: linear-gradient(transparent 62%, var(--mark) 62%, var(--mark) 94%, transparent 94%); }
.card p { font-size: 0.95rem; color: var(--ink-soft); }
.card .meta {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-soft);
}

/* Method strip */
.method { border-top: 2px solid var(--ink); padding: 40px 0 56px; }
.method ol {
  list-style: none;
  counter-reset: step;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  margin-top: 24px;
}
.method li { counter-increment: step; }
.method li::before {
  content: counter(step, decimal-leading-zero);
  display: block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--green);
  margin-bottom: 6px;
}
.method li h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  margin-bottom: 6px;
}
.method li p { font-size: 0.92rem; color: var(--ink-soft); }

/* Prose pages and articles */
.prose { max-width: var(--max-prose); margin: 0 auto; padding: 56px 22px 72px; }
.prose .kicker {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--green);
  margin-bottom: 14px;
}
.prose h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.7rem, 4.2vw, 2.5rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}
.prose .byline {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-soft);
  padding-bottom: 22px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 28px;
}
.prose h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.45rem;
  letter-spacing: -0.01em;
  margin: 38px 0 12px;
}
.prose h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.12rem;
  margin: 28px 0 8px;
}
.prose p { margin-bottom: 16px; }
.prose ul, .prose ol { margin: 0 0 16px 22px; }
.prose li { margin-bottom: 6px; }
.prose table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  margin: 8px 0 20px;
}
.prose th, .prose td {
  text-align: left;
  padding: 10px 12px 10px 0;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}
.prose th {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}
.prose img { max-width: 100%; border: 1px solid var(--rule); }
.prose figcaption {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-soft);
  margin-top: 6px;
}

/* Disclosure banner inside articles */
.disclosure-note {
  background: var(--mono-bg);
  border-left: 4px solid var(--mark);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.55;
  padding: 12px 16px;
  margin-bottom: 28px;
}
.disclosure-note a { text-decoration-thickness: 2px; text-decoration-color: var(--mark); }

/* Verdict box */
.verdict {
  background: var(--panel);
  border: 2px solid var(--ink);
  padding: 20px 22px;
  margin: 28px 0;
}
.verdict .label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--green);
  margin-bottom: 8px;
}
.verdict p { margin-bottom: 0; }

/* Update log */
.update-log {
  border-top: 2px solid var(--ink);
  margin-top: 44px;
  padding-top: 20px;
}
.update-log h2 { margin-top: 0; }
.update-log dl { font-family: var(--font-mono); font-size: 0.85rem; }
.update-log dt {
  font-weight: 600;
  color: var(--green);
  margin-top: 14px;
}
.update-log dd { margin: 4px 0 0 0; font-family: var(--font-body); font-size: 1rem; }

/* Footer */
.site-footer {
  border-top: 2px solid var(--ink);
  padding: 32px 0 44px;
}
.site-footer .wrap {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.site-footer p, .site-footer a {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-soft);
}
.footer-nav { display: flex; gap: 16px; flex-wrap: wrap; }

@media (max-width: 640px) {
  .hero { padding: 44px 0 36px; }
  .ledger { overflow-x: auto; }
  .ledger table { min-width: 560px; }
}

.ledger-note {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-soft);
  margin-top: 14px;
  max-width: 60ch;
}