:root {
  --bg: #F2F5F9; --surface: #FFFFFF; --ink: #141C2B; --muted: #5A6577; --line: #D6DDE7;
  --accent: #0B5FBF; --accent-ink: #0A4A94; --accent-soft: #E1ECFA; --accent-contrast: #FFFFFF;
  --warn: #9A5B00; --warn-soft: #FBEBD0; --ok: #1F7A4D; --ok-soft: #DDF2E6;
  --display: "Sora", "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  --body: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  --mono: "IBM Plex Mono", "Cascadia Mono", "Consolas", monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0D131D; --surface: #151D2A; --ink: #E7ECF4; --muted: #9AA6B8; --line: #2A3546;
    --accent: #7AB0F7; --accent-ink: #A9CCFB; --accent-soft: #1A2C46; --accent-contrast: #0D131D;
    --warn: #E5AB55; --warn-soft: #3A2A10; --ok: #6CCB94; --ok-soft: #14301F;
  }
}
* { box-sizing: border-box; }
html { scroll-padding-top: 64px; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--body); font-size: 15px; line-height: 1.5; }
a { color: var(--accent-ink); text-decoration: none; }
a:hover, a:focus-visible { text-decoration: underline; }
a:focus-visible, .tile:focus-visible, .cta:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 24px; }

/* masthead */
.masthead { background: var(--surface); border-bottom: 1px solid var(--line); padding: 18px 0 26px; }
.brand-row { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; margin-bottom: 26px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 600; }
.brand:hover { text-decoration: none; color: var(--accent-ink); }
.brand-mark { font-family: var(--mono); font-size: 12px; letter-spacing: .08em; background: var(--accent); color: var(--accent-contrast); padding: 4px 7px; border-radius: 4px; }
.cta-row { display: flex; gap: 8px; flex-wrap: wrap; }
.cta { display: inline-block; font-size: 13.5px; font-weight: 500; padding: 7px 12px; border-radius: 999px; border: 1px solid var(--line); color: var(--ink); background: var(--bg); }
.cta:hover { border-color: var(--accent); color: var(--accent-ink); text-decoration: none; }
.cta.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-contrast); }
.cta.primary:hover { color: var(--accent-contrast); opacity: .92; }
.eyebrow { font-family: var(--mono); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin: 0 0 8px; }
h1 { font-family: var(--display); font-size: clamp(28px, 4vw, 42px); line-height: 1.1; margin: 0 0 12px; text-wrap: balance; letter-spacing: -.01em; }
.lede { max-width: 68ch; margin: 0; color: var(--muted); font-size: 16px; }
.stats { margin: 14px 0 0; font-family: var(--mono); font-size: 12.5px; color: var(--muted); font-variant-numeric: tabular-nums; }
.stats b { color: var(--ink); font-weight: 500; }
.dot { padding: 0 4px; }

/* banner + nav */
.banner { margin: 16px 0 0; padding: 8px 12px; background: var(--warn-soft); color: var(--warn); border-radius: 4px; font-size: 13.5px; }
.banner[hidden] { display: none; }
.nav { position: sticky; top: 0; z-index: 5; background: var(--bg); border-bottom: 1px solid var(--line); padding: 10px 0; display: flex; gap: 6px; flex-wrap: wrap; }
.nav a { font-family: var(--mono); font-size: 12px; padding: 4px 9px; border: 1px solid var(--line); border-radius: 999px; background: var(--surface); color: var(--ink); }
.nav a:hover { border-color: var(--accent); text-decoration: none; color: var(--accent-ink); }
.loading { color: var(--muted); padding: 40px 0; }

/* summary tiles */
.summary { display: grid; gap: 20px; padding: 28px 0 8px; }
.tier h3 { font-family: var(--mono); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin: 0 0 8px; font-weight: 500; }
.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 10px; }
.tile { display: grid; grid-template-columns: 1fr auto; grid-template-areas: "code count" "name count"; align-items: center; column-gap: 10px; background: var(--surface); border: 1px solid var(--line); border-radius: 6px; padding: 12px 14px; color: var(--ink); }
.tile:hover { border-color: var(--accent); text-decoration: none; }
.tcode { grid-area: code; font-family: var(--mono); font-weight: 500; font-size: 14px; color: var(--accent-ink); }
.tname { grid-area: name; font-size: 12.5px; color: var(--muted); }
.tcount { grid-area: count; font-family: var(--display); font-size: 26px; font-weight: 600; font-variant-numeric: tabular-nums; }

/* cert sections */
.cert { margin-top: 44px; }
.cert-head { display: grid; grid-template-columns: auto 1fr auto; gap: 18px; align-items: start; padding-bottom: 12px; border-bottom: 2px solid var(--ink); }
.code { font-family: var(--mono); font-size: 22px; font-weight: 500; color: var(--accent-ink); background: var(--accent-soft); padding: 6px 10px; border-radius: 4px; line-height: 1; margin-top: 4px; }
.cert-titles h2 { font-family: var(--display); font-size: 22px; margin: 0 0 4px; line-height: 1.2; text-wrap: balance; }
.sub { margin: 0; color: var(--muted); font-size: 13.5px; }
.note { margin: 8px 0 0; padding: 6px 10px; background: var(--warn-soft); color: var(--warn); border-radius: 4px; font-size: 13px; max-width: 70ch; }
.stat { display: grid; justify-items: end; line-height: 1; }
.stat .big { font-family: var(--display); font-size: 34px; font-weight: 700; font-variant-numeric: tabular-nums; }
.stat .lbl { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; margin-top: 4px; }
.stat .sm { font-family: var(--mono); font-size: 12px; color: var(--muted); margin-top: 6px; }
.empty { color: var(--muted); padding: 14px 0; font-size: 14px; }

/* tables */
.tablewrap { overflow-x: auto; }
table { width: 100%; min-width: 760px; border-collapse: collapse; font-size: 14px; }
th { text-align: left; font-family: var(--mono); font-weight: 500; font-size: 11.5px; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); padding: 10px 8px 8px; border-bottom: 1px solid var(--line); }
td { padding: 9px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
tr:last-child td { border-bottom: 0; }
td.n, th.n { width: 36px; font-family: var(--mono); color: var(--muted); font-variant-numeric: tabular-nums; }
td.v a { font-weight: 500; }
td.v .meta { display: block; font-family: var(--mono); font-size: 11.5px; color: var(--muted); margin-top: 2px; }
td.d, th.d { width: 72px; font-family: var(--mono); font-variant-numeric: tabular-nums; white-space: nowrap; }
td.k, th.k { width: 200px; font-family: var(--mono); font-size: 12px; color: var(--ok); }
.code-sm { font-family: var(--mono); font-weight: 500; white-space: nowrap; }
.badge-auto { display: inline-block; margin-left: 6px; padding: 1px 6px; border-radius: 999px; font-family: var(--mono); font-size: 10.5px; letter-spacing: .04em; text-transform: uppercase; background: var(--accent-soft); color: var(--accent-ink); vertical-align: middle; }

/* retired, unmapped, method */
.retired, .unmapped, .method { margin-top: 56px; }
.retired h2, .unmapped h2, .method h2 { font-family: var(--display); font-size: 22px; margin: 0 0 6px; }
.retired p, .unmapped p, .method p { color: var(--muted); max-width: 70ch; margin: 0 0 14px; }
.ugroups { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 18px; }
.ugroup { background: var(--surface); border: 1px solid var(--line); border-radius: 6px; padding: 14px 16px; }
.ugroup h3 { font-size: 14px; margin: 0 0 8px; font-weight: 600; }
.ugroup ul { margin: 0; padding-left: 18px; font-size: 13.5px; display: grid; gap: 4px; }
.ugroup .why { color: var(--muted); font-size: 12.5px; }
.method { border-top: 1px solid var(--line); padding-top: 20px; }
.method ol { max-width: 75ch; padding-left: 20px; color: var(--muted); display: grid; gap: 6px; }

/* footer */
.footer { margin-top: 64px; border-top: 1px solid var(--line); background: var(--surface); padding: 28px 0 40px; }
.footer-cta { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 14px; }
.footnote { max-width: 80ch; color: var(--muted); font-size: 13px; margin: 0; }

@media (max-width: 720px) {
  .cert-head { grid-template-columns: 1fr; }
  .stat { justify-items: start; }
}