:root{
  --ink:#17141c; --ink-2:#211d29; --ink-3:#2c2735;
  --ivory:#f5f0e8; --ivory-2:#fffdfa; --paper:#fbf7f1;
  --text:#26212e; --muted:#6d6679; --mute-2:#8a8397;
  --coral:#ff5a3d; --coral-dim:#c8402a; --mint:#2f9c86; --mint-soft:#6fd0b4;
  --line:rgba(23,20,28,.12); --line-dark:rgba(255,255,255,.12);
  --radius:20px; --radius-sm:12px;
  --ease:cubic-bezier(.22,1,.36,1);
  --serif:"Iowan Old Style","Palatino Linotype",Palatino,"Book Antiqua",Georgia,serif;
  --sans:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--text);line-height:1.68;font-family:var(--sans);
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:inherit}
code{font-family:var(--mono);font-size:.86em;background:rgba(255,90,61,.10);padding:.1em .35em;border-radius:5px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:1rem;top:1rem;z-index:60;background:var(--coral);color:#fff;padding:.6rem 1rem;border-radius:10px;font-weight:700}
.shell{width:min(1120px,calc(100% - 2.6rem));margin:auto}

/* ---- dark control bar ---- */
.nav{position:sticky;top:0;z-index:30;background:rgba(23,20,28,.9);backdrop-filter:blur(14px) saturate(1.4);
  border-bottom:1px solid var(--line-dark)}
.nav .shell.bar{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:74px}
.brand{display:flex;align-items:center;gap:.7rem;text-decoration:none;color:var(--ivory);
  font-family:var(--serif);font-size:1.22rem;font-weight:600;letter-spacing:-.01em}
.mark{width:34px;height:34px;border-radius:11px;display:grid;place-items:center;background:var(--coral);
  color:#fff;font:800 .74rem/1 var(--mono);letter-spacing:.02em}
.links{display:flex;align-items:center;gap:1.05rem;flex-wrap:wrap}
.links a{text-decoration:none;font-size:.875rem;font-weight:600;color:rgba(245,240,232,.62);
  transition:color .18s var(--ease)}
.links a:hover,.links a[aria-current=page]{color:var(--ivory)}
.btn{display:inline-flex;align-items:center;gap:.45rem;background:var(--coral);color:#fff!important;
  padding:.6rem 1.05rem;border-radius:999px;text-decoration:none;font-weight:700;font-size:.875rem;
  transition:transform .2s var(--ease),background-color .2s var(--ease)}
.btn:hover{transform:translateY(-2px);background:#ff6d54}
.btn:active{transform:translateY(0)}
.ghost{display:inline-flex;align-items:center;padding:.58rem 1rem;border-radius:999px;border:1px solid var(--line);
  text-decoration:none;font-weight:700;font-size:.875rem;color:var(--text);
  transition:transform .2s var(--ease),border-color .2s var(--ease)}
.ghost:hover{transform:translateY(-2px);border-color:var(--coral)}

/* ---- dark hero band ---- */
.page-hero{background:
  radial-gradient(900px 420px at 88% -20%, rgba(255,90,61,.22), transparent 62%),
  radial-gradient(700px 380px at 4% 110%, rgba(47,156,134,.18), transparent 60%),
  var(--ink);
  color:var(--ivory);padding:4.6rem 0 3.6rem;border-bottom:3px solid var(--coral)}
.page-hero .crumb-line{font:600 .7rem/1.5 var(--mono);letter-spacing:.16em;text-transform:uppercase;color:var(--mint-soft)}
.eyebrow{font:700 .7rem/1.5 var(--mono);letter-spacing:.24em;text-transform:uppercase;color:rgba(245,240,232,.55);margin-top:1rem}
h1{font-family:var(--serif);font-size:clamp(2.3rem,5.6vw,4.2rem);line-height:1.04;letter-spacing:-.02em;
  margin:.55rem 0 1rem;max-width:22ch;font-weight:600}
h2{font-family:var(--serif);font-size:clamp(1.45rem,2.6vw,2rem);line-height:1.18;letter-spacing:-.01em;
  margin:2.6rem 0 .7rem;font-weight:600}
h3{font-family:var(--sans);font-size:1.075rem;line-height:1.35;margin:.2rem 0 .5rem;font-weight:700;letter-spacing:-.01em}
.lede{max-width:62ch;color:rgba(245,240,232,.72);font-size:1.11rem}
.hero-cta{display:flex;gap:.7rem;flex-wrap:wrap;margin-top:1.7rem;align-items:center}
.page-hero .ghost{color:var(--ivory);border-color:var(--line-dark)}
.page-hero .ghost:hover{border-color:var(--mint-soft)}

/* ---- content bands ---- */
.band{padding:2.6rem 0}
.band + .band{padding-top:.4rem}
.grid{display:grid;gap:1.1rem;margin-top:1.4rem}
.grid.three{grid-template-columns:repeat(3,1fr)}
.grid.two{grid-template-columns:repeat(2,1fr)}
.card{background:var(--ivory-2);border:1px solid var(--line);border-radius:var(--radius);padding:1.5rem;
  box-shadow:0 1px 0 rgba(23,20,28,.03);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease)}
.card:hover{transform:translateY(-4px);box-shadow:0 14px 30px rgba(23,20,28,.09);border-color:rgba(255,90,61,.42)}
.card p{color:var(--muted);margin:.35rem 0 .8rem}
.card-quiet{background:rgba(255,255,255,.6)}
.card-quiet:hover{transform:translateY(-2px);box-shadow:none}
.tag{display:inline-block;font:700 .66rem/1 var(--mono);letter-spacing:.14em;text-transform:uppercase;
  color:var(--mint);border:1px solid rgba(47,156,134,.4);border-radius:999px;padding:.34rem .62rem}
.text-link{display:inline-block;font-weight:700;font-size:.9rem;text-decoration:none;color:var(--coral-dim);
  border-bottom:2px solid rgba(255,90,61,.28);padding-bottom:1px;
  transition:border-color .18s var(--ease),transform .18s var(--ease)}
.text-link:hover{border-color:var(--coral);transform:translateY(-1px)}

/* ---- prose ---- */
.prose{max-width:72ch;margin-top:1.4rem}
.prose p{color:#423b4d}
.prose strong{color:var(--text)}
.prose h2:first-child{margin-top:0}

/* ---- callouts ---- */
.callout{border-radius:var(--radius-sm);padding:1.35rem 1.5rem;margin:1.8rem 0 0;background:rgba(255,255,255,.72);
  border:1px solid var(--line);border-left:5px solid var(--mint)}
.callout h3{margin-top:0}
.callout p{margin:.3rem 0 0;color:#423b4d;max-width:70ch}
.callout-warm{border-left-color:var(--coral);background:rgba(255,90,61,.07)}

/* ---- ticks / crosses ---- */
.ticks,.crosses{list-style:none;padding:0;margin:.6rem 0 0}
.ticks li,.crosses li{position:relative;padding-left:1.6rem;margin:.55rem 0;color:var(--muted);font-size:.95rem}
.ticks li::before{content:"";position:absolute;left:.25rem;top:.62em;width:.5rem;height:.5rem;border-radius:2px;background:var(--mint)}
.crosses li::before{content:"";position:absolute;left:.25rem;top:.62em;width:.5rem;height:.5rem;border-radius:50%;background:var(--coral)}

/* ---- spectrum figure ---- */
.spectrum{margin:2.4rem 0 0;background:var(--ivory-2);border:1px solid var(--line);border-radius:var(--radius);padding:1.6rem}
.spectrum-track{position:relative;height:10px;border-radius:999px;
  background:linear-gradient(90deg,#3fbf9c 0%,#b9c15a 38%,#f0a03c 64%,#ff5a3d 100%)}
.spectrum-track .dot{position:absolute;top:50%;width:16px;height:16px;border-radius:50%;background:var(--ivory-2);
  border:3px solid var(--ink);transform:translate(-50%,-50%);
  transition:transform .22s var(--ease)}
.dot-1{left:6%}.dot-2{left:28%}.dot-3{left:52%}.dot-4{left:76%}.dot-5{left:96%}
.spectrum:hover .dot-2,.spectrum:focus-within .dot-2{transform:translate(-50%,-58%)}
.spectrum-labels{display:flex;justify-content:space-between;margin-top:.9rem;
  font:700 .66rem/1.4 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--mute-2)}
.spectrum-labels span:nth-child(5){color:var(--coral-dim)}
figcaption{margin-top:1.1rem;font-size:.875rem;color:var(--mute-2);max-width:68ch}

/* ---- signal rail ---- */
.rail{list-style:none;padding:0;margin:1.4rem 0 0;display:grid;gap:.85rem}
.rail-item{display:grid;grid-template-columns:64px 1fr;gap:1.1rem;background:var(--ivory-2);
  border:1px solid var(--line);border-left:6px solid var(--mint);border-radius:var(--radius-sm);padding:1.2rem 1.4rem;
  transition:transform .22s var(--ease),border-color .22s var(--ease)}
.rail-item:hover{transform:translateX(4px)}
.rail-item.sev-2{border-left-color:#e9a13b}
.rail-item.sev-3{border-left-color:var(--coral)}
.rail-num{font:700 .95rem/1 var(--mono);color:var(--mute-2);padding-top:.35rem}
.rail-item h3{margin-top:0}
.rail-item p{margin:.2rem 0 0;color:var(--muted);font-size:.95rem}
.rail-item strong{color:var(--text);font-weight:700}

/* ---- steps ---- */
.steps{counter-reset:s;display:grid;gap:.85rem;margin-top:1.4rem}
.step{counter-increment:s;display:grid;grid-template-columns:44px 1fr;gap:1rem;align-items:start;
  background:var(--ivory-2);border:1px solid var(--line);border-radius:var(--radius-sm);padding:1.25rem 1.4rem;
  transition:transform .2s var(--ease),border-color .2s var(--ease)}
.step:hover{transform:translateY(-3px);border-color:rgba(47,156,134,.5)}
.step::before{content:counter(s,decimal-leading-zero);font:700 1rem/1 var(--mono);color:var(--coral)}
.step p{margin:.2rem 0 0;color:var(--muted);font-size:.95rem}

/* ---- tables ---- */
.table-wrap{overflow-x:auto;margin-top:1.6rem;border:1px solid var(--line);border-radius:var(--radius);background:var(--ivory-2)}
table{border-collapse:collapse;width:100%;min-width:560px}
caption{text-align:left;padding:1.1rem 1.25rem .4rem;font:700 .7rem/1.4 var(--mono);letter-spacing:.14em;
  text-transform:uppercase;color:var(--mint)}
th,td{padding:.8rem 1.25rem;text-align:left;border-bottom:1px solid var(--line);font-size:.925rem}
thead th{font:700 .7rem/1.4 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--mute-2)}
tbody tr:last-child td{border-bottom:0}
tbody tr{transition:background-color .18s var(--ease)}
tbody tr:hover{background:rgba(47,156,134,.06)}
td:first-child{font-weight:700;font-variant-numeric:tabular-nums}

/* ---- FAQ ---- */
.faq{margin-top:1.4rem;display:grid;gap:.7rem}
.qa{background:var(--ivory-2);border:1px solid var(--line);border-radius:var(--radius-sm);padding:1rem 1.25rem;
  transition:border-color .2s var(--ease)}
.qa[open]{border-color:rgba(255,90,61,.45)}
.qa summary{cursor:pointer;font-weight:700;font-size:1rem;list-style:none;display:flex;justify-content:space-between;gap:1rem;align-items:baseline}
.qa summary::-webkit-details-marker{display:none}
.qa summary::after{content:"+";font:700 1.2rem/1 var(--mono);color:var(--coral);flex:none}
.qa[open] summary::after{content:"\2212"}
.qa p{margin:.75rem 0 0;color:var(--muted);font-size:.95rem;max-width:72ch}

/* ---- disclosure ---- */
.disclosure{margin-top:2.2rem;padding:1.15rem 1.35rem;border-radius:var(--radius-sm);font-size:.865rem;
  color:#4a4356;background:rgba(23,20,28,.045);border:1px dashed var(--line)}
.link-out{color:var(--coral-dim);font-weight:700;text-decoration:underline;
  text-decoration-color:rgba(255,90,61,.4);text-underline-offset:3px;
  transition:text-decoration-color .18s var(--ease)}
.link-out:hover{text-decoration-color:var(--coral)}

/* ---- footer ---- */
.footer{background:var(--ink);color:rgba(245,240,232,.66);margin-top:3.4rem;padding:3rem 0 2.4rem;
  border-top:3px solid var(--coral)}
.footer .brand{margin-bottom:.6rem}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:2rem}
.footer strong{display:block;color:var(--ivory);font:700 .7rem/1.6 var(--mono);letter-spacing:.16em;
  text-transform:uppercase;margin-bottom:.5rem}
.footer a{display:block;text-decoration:none;font-size:.9rem;padding:.16rem 0;color:rgba(245,240,232,.66);
  transition:color .18s var(--ease),transform .18s var(--ease)}
.footer a:hover{color:var(--ivory);transform:translateX(2px)}
.footer p{font-size:.9rem;max-width:44ch;margin:.2rem 0 0}
.fine{margin:2.2rem 0 0;padding-top:1.3rem;border-top:1px solid var(--line-dark);
  font-size:.8rem;color:rgba(245,240,232,.5);max-width:none}

/* ---- responsive ---- */
@media (max-width:900px){
  .grid.three,.grid.two{grid-template-columns:1fr 1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .grid.three,.grid.two{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr;gap:1.4rem}
  .page-hero{padding:3.2rem 0 2.6rem}
  .rail-item{grid-template-columns:1fr;gap:.4rem}
  .spectrum-labels span:nth-child(2),.spectrum-labels span:nth-child(4){display:none}
}

/* ---- reduced motion: drop movement, keep every signal ---- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
  .card:hover,.rail-item:hover,.step:hover,.footer a:hover{transform:none}
}