:root{
  --bg:#fbfcf8; --paper:#ffffff; --paper2:#f4f6ee; --line:#e5e8dc; --line2:#d7dcc8;
  --ink:#1b2113; --soft:#3c4531; --muted:#65715a; --lime:#65a30d; --lime-d:#4d7c0f;
  --wash:#eef4df; --up:#3f7d20; --down:#b4341f;
  --disp:'Fraunces',Georgia,'Times New Roman',serif;
  --text:'Public Sans',system-ui,-apple-system,Segoe UI,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--text);line-height:1.65;
  font-size:17px;-webkit-font-smoothing:antialiased}
.wrap{max-width:1020px;margin:0 auto;padding:0 22px}
a{color:var(--lime-d);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{font-family:var(--disp);line-height:1.14;letter-spacing:-.01em;font-weight:600;color:#141a0d}
h1{font-weight:600}
h2{font-size:clamp(1.4rem,2.6vw,1.95rem);margin:0 0 .45em}
h3{font-size:1.12rem;margin:1.5em 0 .35em}
p{margin:0 0 1em}
.muted{color:var(--muted)}
section{padding:46px 0}
section + section{border-top:1px solid var(--line)}
.eyebrow{font-family:var(--text);font-size:.74rem;font-weight:700;letter-spacing:.2em;
  text-transform:uppercase;color:var(--lime-d);margin-bottom:14px}
/* nav */
.bss-nav{position:sticky;top:0;z-index:40;display:flex;align-items:center;justify-content:space-between;
  gap:18px;padding:14px 22px;background:rgba(251,252,248,.9);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line)}
.bss-mark{display:flex;align-items:center;gap:9px;font-family:var(--disp);font-weight:600;color:#141a0d;
  font-size:1.08rem}
.bss-mark .tick{width:11px;height:11px;border-radius:3px;background:var(--lime);
  box-shadow:0 0 0 3px var(--wash)}
.bss-menu{display:flex;gap:21px;list-style:none;margin:0;padding:0;font-size:.93rem}
.bss-menu a{color:var(--soft);font-weight:500}
.bss-menu a:hover{color:var(--lime-d);text-decoration:none}
.bss-cta{border:1.5px solid var(--lime);color:var(--lime-d)!important;padding:7px 14px;border-radius:8px;
  font-weight:600;font-size:.86rem}
.bss-cta:hover{background:var(--wash);text-decoration:none}
.bss-burger{display:none;background:none;border:0;cursor:pointer;width:32px;height:26px}
.bss-burger span{display:block;height:2px;background:var(--soft);margin:5px 0;border-radius:2px}
.bss-tray{display:none;flex-direction:column;gap:2px;padding:6px 22px 16px;border-bottom:1px solid var(--line);
  background:var(--paper)}
.bss-tray a{color:var(--ink);padding:11px 0;border-bottom:1px solid var(--line);font-size:1rem}
.bss-tray.open{display:flex}
/* hero + blocks */
.bss-hero{padding:62px 0 42px}
.bss-hero h1{font-size:clamp(2.05rem,4.6vw,3.1rem);margin:.3em 0 .3em;color:#141a0d}
.lede{font-size:1.16rem;color:var(--soft);max-width:64ch}
.rail{display:flex;flex-wrap:wrap;gap:9px;margin-top:24px;font-size:.84rem}
.pill{border:1px solid var(--line2);background:var(--paper);border-radius:999px;padding:7px 13px;color:var(--muted)}
.pill b{color:var(--lime-d);font-weight:700}
.cta{display:inline-block;margin-top:26px;background:var(--lime);color:#fff;font-weight:700;
  font-family:var(--text);padding:13px 22px;border-radius:9px;font-size:.96rem}
.cta:hover{background:var(--lime-d);text-decoration:none}
.lead{font-size:1.08rem;color:var(--soft)}
.slab{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:24px 26px;margin:20px 0;
  box-shadow:0 1px 0 var(--line)}
.slab.mark{border-color:var(--line2);box-shadow:0 0 0 4px var(--wash)}
.grid{display:grid;gap:16px}
@media(min-width:720px){.g3{grid-template-columns:repeat(3,1fr)}.g2{grid-template-columns:1fr 1fr}}
.cell{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:19px}
.cell h3{margin-top:0}
.flag{font-size:.7rem;font-weight:700;letter-spacing:.15em;text-transform:uppercase;color:var(--lime-d)}
.badge{display:inline-block;font-size:.64rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;
  color:#fff;background:var(--lime);border-radius:5px;padding:2px 7px;vertical-align:middle;margin-left:7px}
ul.ticks{list-style:none;padding:0;margin:16px 0}
ul.ticks li{padding:10px 0 10px 28px;position:relative;border-bottom:1px solid var(--line);color:var(--soft)}
ul.ticks li:before{content:"";position:absolute;left:4px;top:17px;width:9px;height:9px;border-radius:2px;
  background:var(--lime)}
.scan{overflow-x:auto;margin:20px 0}
table{border-collapse:collapse;width:100%;font-size:.93rem;min-width:520px}
caption{caption-side:bottom;text-align:left;color:var(--muted);font-size:.82rem;padding-top:10px}
th,td{padding:12px 13px;border-bottom:1px solid var(--line);text-align:left}
th{font-size:.71rem;letter-spacing:.09em;text-transform:uppercase;color:var(--muted);font-weight:700}
tr.flagship td{background:var(--wash)}
td .up{color:var(--up);font-weight:700}
.crumbs{font-size:.8rem;color:var(--muted);padding:18px 0 0}
.crumbs a{color:var(--muted)}
.crumbs .div{opacity:.5;margin:0 5px}
.verdict{font-size:1.12rem;color:var(--soft);max-width:66ch;margin:.4em 0 0}
.prose h2{font-size:1.12rem;margin:1.5em 0 .35em;color:var(--lime-d)}
.prose h3{color:var(--lime-d)}
.prose code{background:var(--paper2);border:1px solid var(--line);border-radius:6px;padding:2px 6px;
  font-size:.85em;color:var(--ink)}
.aside{font-size:.92rem;color:var(--muted);border-left:3px solid var(--lime);padding:6px 0 6px 16px;margin:18px 0;
  background:linear-gradient(90deg,var(--wash),transparent)}
.bss-foot{border-top:1px solid var(--line);background:var(--paper2);margin-top:32px;padding:44px 0 30px}
.bss-foot .cols{display:grid;gap:22px}
@media(min-width:720px){.bss-foot .cols{grid-template-columns:2fr 1fr 1fr 1fr}}
.bss-foot a{color:var(--muted);display:block;padding:3px 0}
.bss-foot a:hover{color:var(--lime-d)}
.bss-foot .head{color:#141a0d;font-family:var(--disp);font-size:1rem;font-weight:600;margin-bottom:9px}
.fine{color:var(--muted);font-size:.83rem;margin-top:26px;border-top:1px solid var(--line);padding-top:16px}
.gradebar{color:var(--lime-d);font-weight:700}
/* worked-example block: a stepped, ledger-style callout distinct from .aside */
.worked{background:var(--paper2);border:1px solid var(--line2);border-left:4px solid var(--lime);
  border-radius:0 12px 12px 0;padding:20px 24px;margin:22px 0}
.worked .flag{margin-bottom:11px}
.worked code{background:var(--paper);border:1px solid var(--line);border-radius:6px;padding:2px 6px;
  font-size:.85em;color:var(--ink);word-break:break-word}
.worked ol{margin:0;padding-left:22px}
.worked ol li{padding:7px 0;color:var(--soft)}
.worked ol li b{color:var(--ink)}
/* on-brand inline diagram frame (lime on the light reading room) */
figure.fig{margin:26px 0;background:var(--paper);border:1px solid var(--line);border-radius:14px;
  padding:20px 20px 12px;box-shadow:0 1px 0 var(--line)}
figure.fig svg{display:block;width:100%;height:auto;max-width:760px;margin:0 auto}
figure.fig figcaption{font-size:.84rem;color:var(--muted);text-align:center;margin-top:12px;max-width:62ch;
  margin-left:auto;margin-right:auto}
.fig .f-box{fill:#ffffff;stroke:var(--line2,#d7dcc8);stroke-width:1.3}
.fig .f-edge{stroke:var(--lime);stroke-width:1.8;fill:none}
.fig .f-h{font-family:'Public Sans',sans-serif;font-size:11.5px;fill:#141a0d;font-weight:700}
.fig .f-t{font-family:'Public Sans',sans-serif;font-size:9.5px;fill:#65715a}
.fig .f-ax{font-family:'Public Sans',sans-serif;font-size:10px;fill:#65715a}
.fig .f-pass{fill:#3f7d20;font-family:'Public Sans',sans-serif;font-size:13px;font-weight:800}
.fig .f-fail{fill:#b4341f;font-family:'Public Sans',sans-serif;font-size:13px;font-weight:800}
/* "Related" block at the foot of a leaf or hub page */
.related{margin:34px 0 0;border-top:1px solid var(--line);padding-top:22px}
.related .head{font-size:.74rem;font-weight:700;letter-spacing:.16em;text-transform:uppercase;
  color:var(--lime-d);margin-bottom:13px;font-family:var(--text)}
.related .rl-grid{display:grid;gap:11px}
@media(min-width:620px){.related .rl-grid{grid-template-columns:1fr 1fr}}
.related a.rl{display:block;border:1px solid var(--line);border-radius:11px;padding:13px 15px;
  background:var(--paper);color:var(--ink)}
.related a.rl:hover{border-color:var(--line2);background:var(--paper2);text-decoration:none}
.related a.rl b{color:var(--lime-d);display:block;font-size:.97rem;font-family:var(--disp);font-weight:600}
.related a.rl span{color:var(--muted);font-size:.85rem}
tr.pickrow td{background:var(--wash)}
@media(max-width:719px){.bss-menu{display:none}.bss-burger{display:block}}

/* a11y + responsive polish */
:focus-visible{outline:2px solid currentColor;outline-offset:3px;border-radius:3px}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation-duration:.01ms !important;transition-duration:.01ms !important}}
@media(max-width:719px){table{min-width:0}th,td{padding:8px 10px}}