:root{
  --bg:#060a0f; --panel:#0b121b; --panel2:#0e1722; --line:#16232f;
  --txt:#e7eef5; --muted:#8aa0b2; --cy:#06b6d4; --cy2:#22d3ee; --warm:#f8b34d;
  --good:#34d399; --bad:#fb7185;
  --mono:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,monospace;
  --disp:'Space Grotesk',system-ui,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--txt);font-family:var(--disp);line-height:1.62;
  -webkit-font-smoothing:antialiased;font-size:16.5px}
.wrap{max-width:1040px;margin:0 auto;padding:0 22px}
a{color:var(--cy2);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{font-family:var(--disp);line-height:1.16;letter-spacing:-.012em}
h2{font-size:clamp(1.3rem,2.4vw,1.7rem);margin:0 0 .5em}
h3{font-size:1.06rem;margin:1.4em 0 .35em;color:#fff}
.muted{color:var(--muted)}
section{padding:42px 0}
section + section{border-top:1px solid var(--line)}
.sec-label{font-family:var(--mono);font-size:.72rem;letter-spacing:.22em;text-transform:uppercase;
  color:var(--cy);margin-bottom:14px}
/* nav */
.bds-nav{position:sticky;top:0;z-index:40;display:flex;align-items:center;justify-content:space-between;
  gap:18px;padding:13px 22px;background:rgba(6,10,15,.86);backdrop-filter:blur(9px);
  border-bottom:1px solid var(--line)}
.bds-mark{display:flex;align-items:center;gap:9px;font-family:var(--mono);font-weight:700;color:#fff;
  font-size:.94rem;letter-spacing:-.01em}
.bds-mark .led{width:9px;height:9px;border-radius:2px;background:var(--cy);box-shadow:0 0 10px var(--cy)}
.bds-menu{display:flex;gap:20px;list-style:none;margin:0;padding:0;font-size:.88rem}
.bds-menu a{color:var(--muted)}
.bds-menu a:hover{color:var(--txt);text-decoration:none}
.bds-cta{border:1px solid var(--cy);color:var(--cy2)!important;padding:7px 13px;border-radius:7px;
  font-family:var(--mono);font-size:.8rem}
.bds-cta:hover{background:rgba(6,182,212,.12);text-decoration:none}
.bds-tog{display:none;background:none;border:0;cursor:pointer;width:30px;height:24px}
.bds-tog span{display:block;height:2px;background:var(--txt);margin:5px 0;border-radius:2px}
.bds-tray{display:none;flex-direction:column;gap:4px;padding:8px 22px 18px;border-bottom:1px solid var(--line);
  background:var(--panel)}
.bds-tray a{color:var(--txt);padding:9px 0;border-bottom:1px solid var(--line);font-size:.95rem}
.bds-tray.show{display:flex}
/* hero + blocks */
.bds-hero{padding:58px 0 40px}
.kicker{font-family:var(--mono);font-size:.74rem;letter-spacing:.2em;text-transform:uppercase;color:var(--cy)}
.bds-hero h1{font-size:clamp(2rem,4.4vw,3rem);margin:.32em 0 .25em;color:#fff}
.stake{font-size:1.12rem;color:#cdd9e3;max-width:64ch}
.ticker{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;font-family:var(--mono);font-size:.82rem}
.chip{border:1px solid var(--line);background:var(--panel);border-radius:7px;padding:8px 12px;color:var(--muted)}
.chip b{color:var(--cy2);font-weight:600}
.btn{display:inline-block;margin-top:26px;background:var(--cy);color:#04222b;font-weight:700;
  font-family:var(--mono);padding:12px 20px;border-radius:8px;font-size:.92rem}
.btn:hover{background:var(--cy2);text-decoration:none}
.lead-chunk{font-size:1.06rem;color:#d4dee7}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:22px 24px;margin:18px 0}
.panel.glow{border-color:#1c3a44;box-shadow:0 0 0 1px rgba(6,182,212,.10) inset}
.grid{display:grid;gap:16px}
@media(min-width:720px){.g3{grid-template-columns:repeat(3,1fr)}.g2{grid-template-columns:1fr 1fr}}
.card{background:var(--panel);border:1px solid var(--line);border-radius:11px;padding:18px}
.card h3{margin-top:0}
.tag{font-family:var(--mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--cy)}
ul.flags{list-style:none;padding:0;margin:14px 0}
ul.flags li{padding:9px 0 9px 26px;position:relative;border-bottom:1px solid var(--line);color:#cfdae3}
ul.flags li:before{content:"\203A";position:absolute;left:6px;color:var(--cy);font-family:var(--mono)}
.scan{overflow-x:auto;margin:18px 0}
table{border-collapse:collapse;width:100%;font-size:.9rem;min-width:520px}
th,td{padding:11px 13px;border-bottom:1px solid var(--line);text-align:left}
th{font-family:var(--mono);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
td .pos{color:var(--good);font-family:var(--mono)}
.bds-crumb{font-family:var(--mono);font-size:.76rem;color:var(--muted);padding:16px 0 0}
.bds-crumb a{color:var(--muted)}
.bds-crumb .sep{opacity:.5;margin:0 4px}
.verdict{font-size:1.1rem;color:#cdd9e3;max-width:66ch;margin:.4em 0 0}
.bds-prose h3{color:var(--cy2)}
.note{font-family:var(--mono);font-size:.82rem;color:var(--muted);border-left:2px solid var(--cy);
  padding:4px 0 4px 14px;margin:16px 0}
.bds-foot{border-top:1px solid var(--line);background:var(--panel2);margin-top:30px;padding:40px 0 30px}
.bds-foot .cols{display:grid;gap:22px}
@media(min-width:720px){.bds-foot .cols{grid-template-columns:2fr 1fr 1fr 1fr}}
.bds-foot a{color:var(--muted);display:block;padding:3px 0}
.bds-foot a:hover{color:var(--cy2)}
.bds-foot .hd{color:#fff;font-family:var(--mono);font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;margin-bottom:9px}
.disc{color:#6f8597;font-size:.82rem;margin-top:24px;border-top:1px solid var(--line);padding-top:16px}
/* worked-example callout: a framed, monospace step block distinct from .note */
.worked{background:var(--panel2);border:1px solid var(--line);border-left:3px solid var(--cy);
  border-radius:0 10px 10px 0;padding:18px 20px;margin:20px 0}
.worked .tag{margin-bottom:10px}
.worked code,code{font-family:var(--mono);font-size:.86em;background:#0a141d;border:1px solid var(--line);
  border-radius:4px;padding:1px 6px;color:var(--cy2);word-break:break-word}
.worked ol{margin:0;padding-left:20px}
.worked ol li{padding:6px 0;color:#cfdae3}
.worked ol li b{color:#fff}
/* on-brand inline diagram frame */
figure.diagram{margin:24px 0;background:var(--panel);border:1px solid var(--line);border-radius:12px;
  padding:18px 18px 12px}
figure.diagram svg{display:block;width:100%;height:auto;max-width:760px;margin:0 auto}
figure.diagram figcaption{font-family:var(--mono);font-size:.78rem;color:var(--muted);
  text-align:center;margin-top:10px}
.diagram .d-box{fill:var(--panel2,#0e1722);stroke:#1c3a44;stroke-width:1.2}
.diagram .d-edge{stroke:var(--cy);stroke-width:1.6;fill:none}
.diagram .d-h{font-family:'JetBrains Mono',monospace;font-size:11.5px;fill:#fff;font-weight:600}
.diagram .d-t{font-family:'JetBrains Mono',monospace;font-size:9.5px;fill:#8aa0b2}
.diagram .d-ax{font-family:'JetBrains Mono',monospace;font-size:10px;fill:#8aa0b2}
.diagram .d-pass{fill:#34d399;font-family:'JetBrains Mono',monospace;font-size:13px;font-weight:700}
.diagram .d-fail{fill:#fb7185;font-family:'JetBrains Mono',monospace;font-size:13px;font-weight:700}
/* related block at the foot of a leaf page */
.related{margin:30px 0 0;border-top:1px solid var(--line);padding-top:20px}
.related .hd{font-family:var(--mono);font-size:.74rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--cy);margin-bottom:12px}
.related .lk{display:grid;gap:10px}
@media(min-width:620px){.related .lk{grid-template-columns:1fr 1fr}}
.related a.rl{display:block;border:1px solid var(--line);border-radius:9px;padding:12px 14px;
  background:var(--panel);color:var(--txt)}
.related a.rl:hover{border-color:#1c3a44;text-decoration:none}
.related a.rl b{color:var(--cy2);display:block;font-size:.95rem}
.related a.rl span{color:var(--muted);font-size:.84rem}
/* readable definition rows for the glossary / explainer lists */
.bds-prose td.pos,td .pos{color:var(--good)}
.gradebar{font-family:var(--mono);color:var(--cy2)}
@media(max-width:719px){.bds-menu{display:none}.bds-tog{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}}