:root{
  --void:#05100f; --slab:#0a1b1a; --slab2:#0e2422; --edge:#173430;
  --fg:#dceeec; --dim:#7fa79c; --teal:#0d9488; --teal2:#2dd4bf; --tealdim:#0b3a36;
  --rise:#34d399; --warn:#f0b86c; --kicker:#f0b86c;
  --mono:'Space Mono',ui-monospace,SFMono-Regular,Menlo,monospace;
  --body:'Plus Jakarta Sans',system-ui,-apple-system,Segoe UI,sans-serif;
  --disp:'Unbounded','Plus Jakarta Sans',system-ui,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--void);color:var(--fg);font-family:var(--body);line-height:1.68;
  font-size:16px;letter-spacing:.005em;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
.cts-shell{max-width:1000px;margin:0 auto;padding:0 22px}
a{color:var(--teal2);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{font-family:var(--disp);line-height:1.2;font-weight:600;color:#f2fffa;letter-spacing:-.01em}
h1{font-weight:700}
h2{font-size:clamp(1.35rem,2.5vw,1.85rem);margin:0 0 .55em}
h3{font-size:1.04rem;margin:1.5em 0 .35em;color:#eafff8;font-weight:500}
p{margin:.78em 0}
.cts-dim{color:var(--dim)}
section{padding:44px 0}
section + section{border-top:1px solid var(--edge)}
.cts-tag{font-family:var(--mono);font-weight:700;font-size:.7rem;letter-spacing:.24em;
  text-transform:uppercase;color:var(--kicker);margin-bottom:14px}
.cts-tag::before{content:"";display:inline-block;width:14px;height:1px;background:var(--kicker);
  vertical-align:middle;margin-right:9px;opacity:.7}
/* top bar */
.cts-bar{position:sticky;top:0;z-index:60;display:flex;align-items:center;justify-content:space-between;
  gap:18px;padding:13px 22px;background:rgba(5,16,15,.9);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--edge)}
.cts-brand{display:flex;align-items:center;gap:9px;font-family:var(--disp);font-weight:700;color:#f2fffa;
  font-size:.96rem;letter-spacing:-.02em}
.cts-brand .node{width:9px;height:9px;border-radius:50%;background:var(--teal);
  box-shadow:0 0 0 3px var(--tealdim),0 0 12px var(--teal)}
.cts-nav{display:flex;gap:21px;list-style:none;margin:0;padding:0;font-size:.82rem}
.cts-nav a{color:var(--dim)}
.cts-nav a:hover{color:var(--fg);text-decoration:none}
.cts-out{border:1px solid var(--teal);color:var(--teal2)!important;padding:7px 14px;border-radius:6px;
  font-size:.78rem}
.cts-out:hover{background:var(--tealdim);text-decoration:none}
.cts-burger{display:none;background:none;border:0;cursor:pointer;width:30px;height:24px}
.cts-burger span{display:block;height:2px;background:var(--fg);margin:5px 0;border-radius:2px}
.cts-drawer{display:none;flex-direction:column;padding:8px 22px 18px;border-bottom:1px solid var(--edge);
  background:var(--slab)}
.cts-drawer a{color:var(--fg);padding:10px 0;border-bottom:1px solid var(--edge);font-size:.95rem}
.cts-drawer.open{display:flex}
/* opening */
.cts-top{padding:60px 0 42px;background:radial-gradient(120% 90% at 20% 0%,var(--slab2),var(--void))}
.cts-kick{font-family:var(--mono);font-weight:700;font-size:.74rem;letter-spacing:.2em;
  text-transform:uppercase;color:var(--kicker)}
.cts-top h1{font-size:clamp(1.9rem,4.3vw,2.85rem);margin:.34em 0 .4em;max-width:20ch;color:#f6fffb}
.cts-stand{font-size:1.12rem;color:#bfe6da;max-width:66ch;line-height:1.66}
.cts-chips{display:flex;flex-wrap:wrap;gap:9px;margin-top:24px;font-size:.78rem}
.cts-chip{border:1px solid var(--edge);background:var(--slab);border-radius:6px;padding:8px 12px;color:var(--dim)}
.cts-chip b{color:var(--teal2);font-weight:700}
.cts-go{display:inline-block;margin-top:26px;background:var(--teal);color:#03201d;font-weight:700;
  padding:12px 22px;border-radius:7px;font-size:.92rem}
.cts-go:hover{background:var(--teal2);text-decoration:none}
.cts-read{font-size:1.02rem;color:#c8e9dd;max-width:70ch;line-height:1.72}
/* panels + cards */
.cts-box{background:var(--slab);border:1px solid var(--edge);border-radius:13px;padding:24px 26px;margin:20px 0}
.cts-box.live{border-color:var(--teal);box-shadow:0 0 0 1px var(--tealdim) inset}
.cts-grid{display:grid;gap:16px}
@media(min-width:720px){.cts-3{grid-template-columns:repeat(3,1fr)}.cts-2{grid-template-columns:1fr 1fr}}
.cts-card{background:var(--slab);border:1px solid var(--edge);border-radius:11px;padding:20px}
.cts-card h3{margin-top:0}
.cts-num{font-family:var(--disp);font-size:1.5rem;color:var(--teal2);font-weight:700;line-height:1}
.cts-pill{font-family:var(--mono);font-size:.68rem;font-weight:700;letter-spacing:.14em;
  text-transform:uppercase;color:var(--teal2)}
/* point lists */
.cts-list{list-style:none;padding:0;margin:18px 0}
.cts-list li{position:relative;padding:11px 0 11px 28px;border-bottom:1px solid var(--edge);color:#c8e9dd}
.cts-list li:before{content:"0x";position:absolute;left:0;top:11px;font-family:var(--mono);
  font-size:.78rem;color:var(--teal);font-weight:700}
/* record table */
.cts-scroll{overflow-x:auto;margin:20px 0}
table{border-collapse:collapse;width:100%;font-size:.86rem;min-width:520px}
caption{caption-side:bottom;text-align:left;color:var(--dim);font-size:.78rem;padding-top:11px;line-height:1.6}
th,td{padding:11px 13px;border-bottom:1px solid var(--edge);text-align:left}
thead th{font-family:var(--mono);font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;
  color:var(--dim);font-weight:700}
tbody tr.mark td{background:var(--slab2)}
td .rise{color:var(--rise);font-family:var(--mono);font-weight:700}
/* breadcrumb + prose */
.cts-crumb{font-family:var(--mono);font-size:.74rem;color:var(--dim);padding:16px 0 0}
.cts-crumb a{color:var(--dim)}
.cts-crumb .gt{opacity:.5;margin:0 5px}
.cts-lede{font-size:1.1rem;color:#bfe6da;max-width:66ch;margin:.4em 0 0;line-height:1.66}
/* vertical rhythm: open up section heads inside long-form prose and lead an H2 with a
   short teal hairline so dense pages get structure instead of one flat teal-on-void wall.
   The first H2/H3 in a prose block keeps a tight top so the lede stays attached. */
.cts-prose h2{margin-top:2.1em;padding-top:.9em;position:relative}
.cts-prose h2::before{content:"";position:absolute;top:0;left:0;width:46px;height:2px;
  background:linear-gradient(90deg,var(--teal2),transparent)}
.cts-prose h3{color:var(--teal2);margin-top:2em}
.cts-prose > h2:first-child,.cts-prose > h3:first-child{margin-top:.2em}
.cts-prose > h2:first-child{padding-top:0}
.cts-prose > h2:first-child::before{display:none}
.cts-prose code{font-family:var(--mono);font-size:.84em;background:var(--slab2);padding:2px 6px;
  border-radius:4px;color:var(--teal2)}
.cts-aside{border-left:3px solid var(--teal);background:var(--slab2);padding:8px 0 8px 16px;
  margin:20px 0;color:#bfe6da;font-size:.94rem}
.cts-mono{font-family:var(--mono);font-size:.8rem;color:var(--dim);border-left:2px solid var(--teal);
  padding:5px 0 5px 14px;margin:16px 0}
/* worked-ledger callout: a framed monospace step block, distinct from .cts-aside / .cts-mono */
.cts-ledger{background:var(--slab2);border:1px solid var(--edge);border-left:3px solid var(--teal2);
  border-radius:0 12px 12px 0;padding:18px 22px;margin:22px 0}
.cts-ledger .cts-pill{margin-bottom:11px}
.cts-ledger code,.cts-prose code{word-break:break-word}
.cts-ledger ol{margin:0;padding-left:20px}
.cts-ledger ol li{padding:6px 0;color:#c8e9dd}
.cts-ledger ol li b{color:#f2fffa}
.cts-ledger .sum{font-family:var(--mono);font-size:.82rem;color:var(--teal2);margin-top:12px;
  border-top:1px dashed var(--edge);padding-top:11px}
/* on-brand inline diagram frame (teal-on-void; .cts-fig- namespace, distinct from siblings) */
figure.cts-fig{margin:26px 0;background:var(--slab);border:1px solid var(--edge);border-radius:13px;
  padding:18px 18px 12px}
figure.cts-fig svg{display:block;width:100%;height:auto;max-width:780px;margin:0 auto}
figure.cts-fig figcaption{font-family:var(--mono);font-size:.78rem;color:var(--dim);
  text-align:center;margin-top:11px;line-height:1.6}
.cts-fig .fg-box{fill:#0e2422;stroke:#1f4a44;stroke-width:1.2}
.cts-fig .fg-box-on{fill:#0b3a36;stroke:#0d9488;stroke-width:1.5}
.cts-fig .fg-rail{stroke:#0d9488;stroke-width:1.6;fill:none}
.cts-fig .fg-h{font-family:'Space Mono',monospace;font-size:11.5px;fill:#f2fffa;font-weight:700}
.cts-fig .fg-t{font-family:'Space Mono',monospace;font-size:9.5px;fill:#7fa79c}
.cts-fig .fg-ax{font-family:'Space Mono',monospace;font-size:10px;fill:#7fa79c}
.cts-fig .fg-rise{fill:#34d399;font-family:'Space Mono',monospace;font-size:10.5px;font-weight:700}
.cts-fig .fg-band{stroke:#2dd4bf;stroke-width:1.3;stroke-dasharray:4 4;fill:none}
.cts-fig .fg-stop{stroke:#f0b86c;stroke-width:1.3;stroke-dasharray:4 4;fill:none}
.cts-fig .fg-price{stroke:#dceeec;stroke-width:1.8;fill:none}
.cts-fig .fg-dot{fill:#2dd4bf}
/* "related" rail at the foot of a leaf / hub page (.cts-rel-, distinct namespace) */
.cts-rel{margin:32px 0 0;border-top:1px solid var(--edge);padding-top:22px}
.cts-rel .hd{font-family:var(--mono);font-size:.72rem;letter-spacing:.18em;text-transform:uppercase;
  color:var(--teal2);margin-bottom:13px}
.cts-rel .lks{display:grid;gap:11px}
@media(min-width:620px){.cts-rel .lks{grid-template-columns:1fr 1fr}}
.cts-rel a.rk{display:block;border:1px solid var(--edge);border-radius:10px;padding:13px 15px;
  background:var(--slab);color:var(--fg)}
.cts-rel a.rk:hover{border-color:var(--teal);text-decoration:none}
.cts-rel a.rk b{color:var(--teal2);display:block;font-size:.94rem}
.cts-rel a.rk span{color:var(--dim);font-size:.83rem}
/* grade-bar table emphasis */
.gradeA{font-family:var(--mono);color:var(--teal2);font-weight:700}
/* footer */
.cts-foot{border-top:1px solid var(--edge);background:var(--slab2);margin-top:30px;padding:42px 0 30px}
.cts-foot .cols{display:grid;gap:22px}
@media(min-width:720px){.cts-foot .cols{grid-template-columns:2fr 1fr 1fr 1fr}}
.cts-foot a{color:var(--dim);display:block;padding:3px 0}
.cts-foot a:hover{color:var(--teal2)}
.cts-foot .top{color:#f2fffa;font-family:var(--disp);font-size:.84rem;font-weight:600;margin-bottom:10px}
.cts-fine{color:#5e7d74;font-size:.78rem;margin-top:24px;border-top:1px solid var(--edge);padding-top:17px}
@media(max-width:719px){.cts-nav{display:none}.cts-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){th,td{padding:8px 10px}}
@media(max-width:768px){
  .cts-scroll{overflow-x:visible;margin:18px 0}
  .cts-scroll table{min-width:0;width:100%;font-size:.86rem}
  .cts-scroll thead{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
  .cts-scroll tr{display:block;background:var(--slab);border:1px solid var(--edge);
    border-left:3px solid var(--teal2);border-radius:8px;margin:0 0 12px;padding:4px 14px 10px}
  .cts-scroll tbody tr.mark{background:var(--slab2);border-left-color:var(--teal)}
  .cts-scroll tbody tr.mark td{background:transparent}
  .cts-scroll td{display:flex;justify-content:space-between;align-items:baseline;gap:16px;
    padding:9px 0;border-bottom:1px dashed var(--edge);text-align:right}
  .cts-scroll tr td:last-child{border-bottom:0}
  .cts-scroll td::before{content:attr(data-label);flex:0 0 42%;text-align:left;
    font-family:var(--mono);font-size:.62rem;letter-spacing:.1em;text-transform:uppercase;
    color:var(--dim);font-weight:700;line-height:1.5}
  .cts-scroll td[data-label="Why it sits there"],
  .cts-scroll td[data-label="How a reader confirms it"]{flex-direction:column;text-align:left;gap:3px}
  .cts-scroll td[data-label="Why it sits there"]::before,
  .cts-scroll td[data-label="How a reader confirms it"]::before{flex-basis:auto}
}