/* ODES — Open Decision Evidence Standard
   Design: "the record crossing a boundary"
   Palette: ink navy, paper, signal amber, slate */

:root{
  --ink:#12161d;
  --paper:#f7f5f0;
  --paper-2:#efece4;
  --slate:#5b6675;
  --slate-2:#8a94a1;
  --line:#d8d3c8;
  --amber:#c8721f;      /* signal / crossing accent */
  --amber-soft:#f0d9bd;
  --white:#ffffff;
  --ok:#2f6b4f;
  --stop:#9a3324;
  --mono:"IBM Plex Mono","SFMono-Regular",ui-monospace,Menlo,Consolas,monospace;
  --sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif;
  --wrap:1080px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}

a{color:var(--ink);text-decoration:none}
a:focus-visible,button:focus-visible{outline:2px solid var(--amber);outline-offset:3px;border-radius:2px}

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 28px}

/* ---------- eyebrow / labels ---------- */
.eyebrow{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--amber);
  margin:0 0 14px;
}
.kicker{font-family:var(--mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--slate)}

/* ---------- header / nav ---------- */
header.site{
  position:sticky;top:0;z-index:50;
  background:rgba(247,245,240,.9);
  backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--mono);font-weight:600;letter-spacing:.02em}
.brand .mark{
  width:26px;height:26px;flex:none;position:relative;
}
.brand .mark::before,.brand .mark::after{
  content:"";position:absolute;left:0;right:0;height:2px;background:var(--ink);
}
.brand .mark::before{top:8px}
.brand .mark::after{top:16px;background:var(--amber)}
.brand .mark i{position:absolute;top:2px;bottom:2px;left:12px;width:2px;background:var(--amber);transform:skewX(-18deg)}
.brand b{font-weight:700}
.nav-links{display:flex;align-items:center;gap:26px;font-size:14px}
.nav-links a{color:var(--slate);font-weight:500}
.nav-links a:hover,.nav-links a[aria-current="page"]{color:var(--ink)}
.nav-links a[aria-current="page"]{box-shadow:inset 0 -2px 0 var(--amber)}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--mono);font-size:13px;letter-spacing:.03em;
  padding:9px 16px;border:1.5px solid var(--ink);background:var(--ink);color:var(--paper);
  border-radius:2px;transition:transform .15s ease,background .15s ease;cursor:pointer;
}
.btn:hover{transform:translateY(-1px)}
.btn.ghost{background:transparent;color:var(--ink)}
.btn.ghost:hover{background:var(--ink);color:var(--paper)}
.btn.amber{background:var(--amber);border-color:var(--amber);color:#fff}
.nav-toggle{display:none;background:none;border:0;font-family:var(--mono);font-size:13px;color:var(--ink);cursor:pointer}

/* ---------- hero ---------- */
.hero{padding:88px 0 40px;position:relative;overflow:hidden}
.hero h1{
  font-size:clamp(2.5rem,6vw,4.4rem);
  line-height:1.02;letter-spacing:-.02em;font-weight:800;margin:0 0 22px;max-width:15ch;
}
.hero h1 .cross{color:var(--amber);position:relative;white-space:nowrap}
.hero p.lede{font-size:clamp(1.05rem,2vw,1.32rem);color:var(--slate);max-width:52ch;margin:0 0 30px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}

/* the signature: the boundary diagram */
.boundary{
  margin-top:56px;border:1px solid var(--line);background:var(--white);
  border-radius:4px;display:grid;grid-template-columns:1fr auto 1fr;
  align-items:stretch;overflow:hidden;
}
.boundary .side{padding:26px 28px}
.boundary .side h4{margin:0 0 4px;font-size:14px;font-family:var(--mono);letter-spacing:.04em}
.boundary .side p{margin:0;font-size:14px;color:var(--slate)}
.boundary .gap{
  position:relative;width:150px;background:
    repeating-linear-gradient(0deg,var(--line) 0 6px,transparent 6px 14px);
  background-size:1.5px 100%;background-repeat:no-repeat;background-position:center;
}
.boundary .record{
  position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  background:var(--amber);color:#fff;font-family:var(--mono);font-size:11px;letter-spacing:.06em;
  padding:8px 12px;border-radius:2px;white-space:nowrap;
  box-shadow:0 6px 20px rgba(200,114,31,.35);
  animation:travel 5s ease-in-out infinite;
}
@keyframes travel{
  0%,12%{left:2%;transform:translate(0,-50%)}
  50%,62%{left:98%;transform:translate(-100%,-50%)}
  88%,100%{left:2%;transform:translate(0,-50%)}
}
@media (prefers-reduced-motion:reduce){.boundary .record{animation:none;left:50%;transform:translate(-50%,-50%)}}
.boundary .gap b{position:absolute;top:12px;left:50%;transform:translateX(-50%);font-family:var(--mono);font-size:10px;letter-spacing:.12em;color:var(--slate-2);text-transform:uppercase}

/* ---------- generic section ---------- */
section{padding:72px 0;border-top:1px solid var(--line)}
section.plain{border-top:0}
h2{font-size:clamp(1.7rem,3.4vw,2.5rem);letter-spacing:-.015em;line-height:1.1;margin:0 0 18px;font-weight:800}
h3{font-size:1.15rem;margin:0 0 8px;letter-spacing:-.01em}
.section-lede{font-size:1.1rem;color:var(--slate);max-width:60ch;margin:0 0 8px}

/* two-col intro */
.split{display:grid;grid-template-columns:.85fr 1.15fr;gap:48px;align-items:start}
@media(max-width:820px){.split{grid-template-columns:1fr;gap:24px}}

/* cards */
.grid{display:grid;gap:20px}
.grid.c2{grid-template-columns:repeat(2,1fr)}
.grid.c3{grid-template-columns:repeat(3,1fr)}
@media(max-width:820px){.grid.c2,.grid.c3{grid-template-columns:1fr}}
.card{
  background:var(--white);border:1px solid var(--line);border-radius:4px;padding:26px 24px;
  transition:border-color .15s ease,transform .15s ease;
}
.card:hover{border-color:var(--amber);transform:translateY(-2px)}
.card .num{font-family:var(--mono);font-size:12px;color:var(--amber);letter-spacing:.1em;display:block;margin-bottom:12px}
.card p{margin:0;color:var(--slate);font-size:15px}
.card h3{color:var(--ink)}

/* the "answers these questions" list */
.qlist{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.qlist li{
  display:flex;gap:16px;align-items:baseline;padding:15px 0;border-bottom:1px solid var(--line);
}
.qlist li span{font-family:var(--mono);font-size:12px;color:var(--amber);flex:none;width:2.2em}
.qlist li p{margin:0}

/* does / does not */
.ledger{display:grid;grid-template-columns:1fr 1fr;gap:0;border:1px solid var(--line);border-radius:4px;overflow:hidden;background:var(--white)}
@media(max-width:720px){.ledger{grid-template-columns:1fr}}
.ledger .col{padding:28px 26px}
.ledger .col+.col{border-left:1px solid var(--line)}
@media(max-width:720px){.ledger .col+.col{border-left:0;border-top:1px solid var(--line)}}
.ledger h3{font-family:var(--mono);font-size:13px;letter-spacing:.06em;text-transform:uppercase;display:flex;align-items:center;gap:9px}
.ledger .is h3{color:var(--ok)}
.ledger .isnt h3{color:var(--stop)}
.ledger ul{list-style:none;margin:16px 0 0;padding:0}
.ledger li{padding:9px 0;font-size:15px;color:var(--slate);border-bottom:1px dashed var(--line);position:relative;padding-left:22px}
.ledger li:last-child{border-bottom:0}
.ledger li::before{position:absolute;left:0;top:9px;font-family:var(--mono);font-size:13px}
.ledger .is li::before{content:"+";color:var(--ok)}
.ledger .isnt li::before{content:"–";color:var(--stop)}

/* steps */
.steps{counter-reset:step;display:grid;gap:2px}
.step{
  display:grid;grid-template-columns:auto 1fr;gap:22px;align-items:start;
  background:var(--white);border:1px solid var(--line);padding:22px 24px;
}
.step:first-child{border-radius:4px 4px 0 0}
.step:last-child{border-radius:0 0 4px 4px}
.step+.step{border-top:0}
.step .n{
  counter-increment:step;font-family:var(--mono);font-weight:600;color:var(--amber);
  font-size:15px;padding-top:1px;
}
.step .n::before{content:counter(step,decimal-leading-zero)}
.step p{margin:0;color:var(--slate);font-size:15px}
.step strong{color:var(--ink);font-weight:600}

/* callout band */
.band{background:var(--ink);color:var(--paper);border-top:0}
.band .eyebrow{color:var(--amber-soft)}
.band h2{color:var(--paper)}
.band p{color:#c2c8d0}
.band .btn.ghost{border-color:var(--paper);color:var(--paper)}
.band .btn.ghost:hover{background:var(--paper);color:var(--ink)}
.band .card{background:#1b2129;border-color:#2a323d}
.band .card p{color:#aeb6c1}
.band .card h3{color:var(--paper)}

/* comparison rows */
.compare{border:1px solid var(--line);border-radius:4px;overflow:hidden;background:var(--white)}
.compare .row{display:grid;grid-template-columns:180px 1fr;gap:0}
@media(max-width:640px){.compare .row{grid-template-columns:1fr}}
.compare .row+.row{border-top:1px solid var(--line)}
.compare .lbl{padding:18px 22px;font-family:var(--mono);font-size:13px;letter-spacing:.03em;background:var(--paper-2);display:flex;align-items:center}
.compare .val{padding:18px 22px;color:var(--slate);font-size:15px;display:flex;align-items:center}
.compare .row.head .lbl,.compare .row.head .val{background:var(--ink);color:var(--paper);font-weight:600}

/* status pill */
.pill{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:12px;letter-spacing:.06em;background:var(--amber-soft);color:#8a4d13;padding:6px 12px;border-radius:100px}
.pill::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--amber)}

/* page hero (interior) */
.pagehead{padding:70px 0 20px;border-bottom:1px solid var(--line)}
.pagehead h1{font-size:clamp(2rem,5vw,3.2rem);letter-spacing:-.02em;margin:0 0 16px;line-height:1.05;font-weight:800}
.pagehead p{font-size:1.15rem;color:var(--slate);max-width:58ch;margin:0}

/* prose */
.prose p{max-width:66ch}
.prose p+p{margin-top:1.1em}

/* footer */
footer.site{background:var(--ink);color:#aeb6c1;padding:52px 0 40px;border-top:0}
footer.site .cols{display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap;margin-bottom:36px}
footer.site .brand{color:var(--paper)}
footer.site .brand .mark::before{background:var(--paper)}
footer.site a{color:#aeb6c1;font-size:14px;display:block;padding:4px 0}
footer.site a:hover{color:var(--paper)}
footer.site h5{color:var(--paper);font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;margin:0 0 12px;font-weight:600}
footer.site .fine{border-top:1px solid #2a323d;padding-top:22px;font-size:13px;color:var(--slate-2);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
footer.site .fine a{display:inline}
footer.site .disclaimer{font-size:12px;line-height:1.6;color:var(--slate-2);max-width:none;margin:0 0 22px;padding-top:22px;border-top:1px solid #2a323d}

/* mobile nav */
@media(max-width:760px){
  .nav-links{
    position:absolute;top:64px;left:0;right:0;background:var(--paper);
    border-bottom:1px solid var(--line);flex-direction:column;align-items:flex-start;
    gap:0;padding:8px 28px 20px;display:none;
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 0;width:100%;border-bottom:1px solid var(--line)}
  .nav-links .btn{margin-top:12px}
  .nav-toggle{display:block}
}

.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none}}