/* ClusterView Manual — vernier / measurement-scale rail
   Palette: mist, ink, teal, ochre, hairline rule. No web fonts, no external assets. */

:root{
  --bg:#EEF1F4;
  --ink:#16212B;
  --teal:#0F766E;
  --ochre:#A16207;
  --rule:#CBD5E1;
  --card:#FFFFFF;
  --muted:#4B5A68;
  --faint:#7C8B99;
  --serif:'Charter','Bitstream Charter',Georgia,serif;
  --gothic:'Franklin Gothic Medium','Arial Narrow',Arial,sans-serif;
  --mono:Consolas,'Courier New',monospace;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--serif);font-size:17px;line-height:1.62;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--teal);text-decoration:none;border-bottom:1px solid rgba(15,118,110,.35)}
a:hover{border-bottom-color:var(--teal)}
:focus-visible{outline:2px solid var(--ochre);outline-offset:2px}

/* ---------- top bar ---------- */
.topbar{
  position:sticky;top:0;z-index:40;background:var(--bg);
  border-bottom:1px solid var(--rule);
  box-shadow:0 1px 0 rgba(22,33,43,.04);
}
.topbar-inner{
  max-width:1180px;margin:0 auto;padding:10px 20px 0;
  display:flex;align-items:flex-end;gap:26px;flex-wrap:wrap;
}
.brand{display:flex;align-items:center;gap:12px;padding-bottom:10px;min-width:250px}
.brand a{display:flex;align-items:center;gap:12px;border:0;color:var(--ink)}
.monogram{
  width:38px;height:38px;flex:0 0 38px;position:relative;
  background:
    repeating-linear-gradient(90deg,rgba(255,255,255,.55) 0 1px,transparent 1px 5px),
    var(--ink);
  border:1px solid var(--ink);
}
.monogram::before{
  content:"";position:absolute;left:5px;top:8px;width:18px;height:4px;background:var(--teal);
}
.monogram::after{
  content:"";position:absolute;left:5px;bottom:6px;width:6px;height:6px;background:var(--ochre);
}
.brand-name{
  font-family:var(--gothic);text-transform:uppercase;letter-spacing:.13em;
  font-size:15px;line-height:1.1;font-weight:700;
}
.brand-domain{
  display:block;font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;
  color:var(--muted);text-transform:lowercase;margin-top:3px;
}
.brand-note{
  font-family:var(--mono);font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--faint);margin-left:auto;padding-bottom:14px;white-space:nowrap;
}

/* ---------- vernier rail ---------- */
.rail{
  display:flex;align-items:stretch;gap:0;margin-left:auto;padding-bottom:0;
}
.navsec{position:relative}
.navsec>summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;gap:7px;
  padding:9px 13px 13px;
  font-family:var(--mono);font-size:10px;letter-spacing:.11em;text-transform:uppercase;
  color:var(--muted);white-space:nowrap;
  border:1px solid transparent;border-bottom:0;
  background:
    repeating-linear-gradient(90deg,var(--rule) 0 1px,transparent 1px 4px) left bottom/100% 3px no-repeat;
  position:relative;
}
.navsec>summary::-webkit-details-marker{display:none}
.navsec>summary::after{
  content:"";position:absolute;left:13px;right:13px;bottom:-1px;height:5px;
  background:repeating-linear-gradient(90deg,var(--muted) 0 1px,transparent 1px 9px);
  opacity:.55;
}
.navsec>summary svg{flex:0 0 14px;stroke:currentColor;fill:none;stroke-width:1.4}
.navsec>summary:hover{color:var(--ink);background-color:rgba(255,255,255,.6)}
.navsec[data-active="true"]>summary{
  color:#F7FCFB;background-color:var(--teal);border-color:var(--teal);
  font-weight:700;
  background-image:repeating-linear-gradient(90deg,rgba(255,255,255,.85) 0 2px,transparent 2px 6px);
  background-position:left bottom;background-size:100% 4px;background-repeat:no-repeat;
}
.navsec[data-active="true"]>summary::after{background:repeating-linear-gradient(90deg,var(--ochre) 0 3px,transparent 3px 9px);opacity:1}
.navsec[data-active="true"]>summary svg{stroke:#F7FCFB}

.navpanel{
  display:none;position:absolute;z-index:60;top:100%;left:0;min-width:272px;
  background:var(--card);border:1px solid var(--rule);
  box-shadow:0 12px 26px rgba(22,33,43,.14);
  padding:8px 0 10px;
}
.navsec:hover>.navpanel,.navsec:focus-within>.navpanel,.navsec[open]>.navpanel{display:block}
.navpanel>.panel-label{
  font-family:var(--mono);font-size:9px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--faint);padding:5px 14px 7px;border-bottom:1px dotted var(--rule);margin-bottom:4px;
}
.navpanel a{
  display:block;padding:7px 15px 7px 22px;border:0;color:var(--ink);
  font-family:var(--gothic);font-size:12.5px;letter-spacing:.045em;text-transform:uppercase;
  position:relative;
}
.navpanel a::before{
  content:"";position:absolute;left:9px;top:50%;width:6px;height:1px;background:var(--rule);
}
.navpanel a:hover{background:#F4F8F9;color:var(--teal)}
.navpanel a[aria-current="page"]{color:var(--teal);font-weight:700;background:#EDF6F4}
.navpanel a[aria-current="page"]::before{width:9px;height:3px;background:var(--ochre);top:calc(50% - 1px)}
.navpanel a.nav-home{border-bottom:1px dotted var(--rule);margin-bottom:4px;color:var(--muted)}

/* mobile rail */
@media (max-width:860px){
  .topbar-inner{gap:10px;padding:8px 14px 0}
  .brand{padding-bottom:6px;min-width:0}
  .brand-note{display:none}
  .rail{
    margin:0 -14px;padding:0 10px 8px;width:calc(100% + 28px);
    overflow-x:auto;overflow-y:visible;gap:8px;align-items:flex-start;
    border-top:1px dotted var(--rule);padding-top:8px;
    scrollbar-width:thin;
  }
  .navsec{flex:0 0 auto;min-width:158px;max-width:230px}
  .navsec>summary{padding:6px 8px 10px;font-size:9px;background:none}
  .navsec>summary::after{display:none}
  .navsec[data-active="true"]>summary{background-image:none}
  .navpanel{
    display:block;position:static;box-shadow:none;border:0;border-left:2px solid var(--rule);
    min-width:0;padding:4px 0 2px;margin-top:2px;background:transparent;
  }
  .navpanel>.panel-label{display:none}
  .navpanel a{font-size:10.5px;padding:5px 6px 5px 14px;text-transform:none;letter-spacing:.02em;font-family:var(--serif)}
  .navpanel a::before{left:4px;width:4px}
}

/* ---------- layout ---------- */
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
.breadcrumb{
  font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--faint);padding:18px 0 0;
}
.breadcrumb a{color:var(--muted)}
.breadcrumb span{margin:0 7px;color:var(--rule)}
.page-head{padding:14px 0 22px;border-bottom:1px solid var(--rule)}
.kicker{
  font-family:var(--mono);font-size:10px;letter-spacing:.22em;text-transform:uppercase;
  color:var(--ochre);margin:0 0 10px;display:flex;align-items:center;gap:9px;
}
.kicker::before{content:"";width:26px;height:3px;background:var(--ochre)}
h1{
  font-family:var(--gothic);text-transform:uppercase;letter-spacing:.055em;
  font-size:clamp(28px,4vw,45px);line-height:1.12;margin:0 0 14px;font-weight:700;
}
h1 .h1-sub{display:block;font-size:.52em;letter-spacing:.09em;color:var(--muted);margin-top:10px;font-weight:400}
.deck{font-size:19px;line-height:1.55;color:var(--muted);max-width:66ch;margin:0 0 6px}

.layout{display:grid;grid-template-columns:minmax(0,1fr) 286px;gap:38px;align-items:start;padding:30px 0 54px}
@media (max-width:900px){.layout{grid-template-columns:1fr;gap:26px}}

article p{margin:0 0 16px;max-width:72ch}
article h2{
  font-family:var(--gothic);text-transform:uppercase;letter-spacing:.06em;
  font-size:22px;line-height:1.25;margin:38px 0 12px;padding-top:12px;
  border-top:1px solid var(--rule);position:relative;
}
article h2::before{
  content:"";position:absolute;top:-1px;left:0;width:60px;height:3px;background:var(--teal);
}
article h2:first-of-type{margin-top:6px}
article h3{
  font-family:var(--gothic);text-transform:uppercase;letter-spacing:.05em;
  font-size:16.5px;margin:26px 0 8px;color:var(--ink);
}
article ul,article ol{margin:0 0 18px;padding-left:22px;max-width:70ch}
article li{margin-bottom:7px}
article li::marker{color:var(--teal)}
article strong{color:var(--ink)}
article code{
  font-family:var(--mono);font-size:.86em;background:#E4EAEE;border:1px solid var(--rule);
  padding:1px 5px;color:#0B3B37;
}
.lede{font-size:18.5px;line-height:1.6}
.lede::first-letter{
  font-family:var(--gothic);font-size:3.1em;float:left;line-height:.82;
  padding:5px 9px 0 0;color:var(--teal);
}

/* disclaimer box under h1 */
.disclaimer-box{
  background:#FBF7EC;border:1px solid #E4D6B4;border-left:5px solid var(--ochre);
  padding:12px 16px;margin:16px 0 18px;max-width:74ch;
}
.disclaimer-box p{
  margin:0;font-family:var(--mono);font-size:11.5px;line-height:1.62;color:#4A3E22;
  letter-spacing:.01em;
}

/* spec / aside */
aside .side-card{
  background:var(--card);border:1px solid var(--rule);padding:15px 16px 13px;margin-bottom:18px;
}
aside h2{
  font-family:var(--mono);font-size:9.5px;letter-spacing:.19em;text-transform:uppercase;
  color:var(--faint);margin:0 0 10px;padding:0 0 7px;border-bottom:1px dotted var(--rule);
}
aside dl{margin:0;font-family:var(--mono);font-size:11px;line-height:1.5}
aside dt{color:var(--faint);text-transform:uppercase;letter-spacing:.08em;font-size:9px;margin-top:9px}
aside dd{margin:2px 0 0;color:var(--ink)}
.side-card p{font-size:14px;line-height:1.55;margin:0 0 10px;color:var(--muted)}
.side-links{list-style:none;margin:0;padding:0}
.side-links li{margin:0;border-bottom:1px dotted var(--rule)}
.side-links li:last-child{border-bottom:0}
.side-links a{display:block;padding:7px 0;border:0;font-family:var(--gothic);font-size:13px;letter-spacing:.03em;text-transform:uppercase}

/* figures */
figure{margin:22px 0 26px;border:1px solid var(--rule);background:var(--card);padding:9px}
figure img{filter:saturate(.72) contrast(.98)}
figcaption{
  font-family:var(--mono);font-size:10.5px;line-height:1.5;color:var(--muted);
  padding:8px 3px 2px;letter-spacing:.02em;
}
figcaption b{color:var(--ochre);font-weight:400;text-transform:uppercase;letter-spacing:.12em;margin-right:6px}

/* tables */
.tablewrap{overflow-x:auto;margin:20px 0 26px;border:1px solid var(--rule);background:var(--card)}
table{border-collapse:collapse;width:100%;min-width:620px;font-size:14.5px}
caption{
  caption-side:top;text-align:left;font-family:var(--mono);font-size:10px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--faint);padding:10px 12px;border-bottom:1px solid var(--rule);
}
th{
  background:var(--ink);color:#F2F6F8;font-family:var(--gothic);text-transform:uppercase;
  letter-spacing:.07em;font-size:11.5px;text-align:left;padding:9px 12px;font-weight:700;
}
td{padding:9px 12px;border-top:1px solid var(--rule);vertical-align:top;line-height:1.45}
tbody tr:nth-child(even) td{background:#F6F9FA}
td:first-child{font-family:var(--gothic);text-transform:uppercase;letter-spacing:.04em;font-size:12.5px;color:#0B3B37}
td.num{font-family:var(--mono);font-size:12.5px}

/* CSS graphics ---------- */
.meter{
  display:flex;align-items:center;gap:10px;margin:18px 0 6px;
  font-family:var(--mono);font-size:9px;letter-spacing:.16em;text-transform:uppercase;color:var(--faint);
}
.channel-meter{
  flex:1;height:16px;border:1px solid var(--rule);background:
    repeating-linear-gradient(90deg,transparent 0 9px,rgba(22,33,43,.14) 9px 10px),
    linear-gradient(90deg,var(--teal) 0 62%,#9CCFC8 62% 78%,#E8DDC4 78% 100%);
  position:relative;
}
.channel-meter::after{
  content:"";position:absolute;right:22%;top:-4px;bottom:-4px;width:2px;background:var(--ochre);
}
.channel-meter::before{
  content:"";position:absolute;left:0;right:0;bottom:3px;height:5px;
  background:repeating-linear-gradient(90deg,rgba(255,255,255,.75) 0 1px,transparent 1px 33px);
}

.tickrule{
  display:flex;align-items:center;gap:12px;margin:32px 0 4px;
  font-family:var(--mono);font-size:9px;letter-spacing:.2em;text-transform:uppercase;color:var(--faint);
}
.tickrule::before,.tickrule::after{
  content:"";flex:1;height:9px;
  background:
    repeating-linear-gradient(90deg,var(--rule) 0 1px,transparent 1px 5px) left bottom/100% 5px no-repeat,
    repeating-linear-gradient(90deg,#95A6B4 0 1px,transparent 1px 45px) left top/100% 9px no-repeat;
}

.led{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--teal);box-shadow:0 0 0 2px rgba(15,118,110,.16);margin-right:7px;vertical-align:1px}
.led.ochre{background:var(--ochre);box-shadow:0 0 0 2px rgba(161,98,7,.16)}
.led.grey{background:var(--faint);box-shadow:0 0 0 2px rgba(124,139,153,.14)}

.ofglyph{
  display:inline-grid;grid-template-columns:repeat(8,7px);grid-auto-rows:5px;gap:2px;
  padding:6px;background:#0E1A22;vertical-align:middle;
}
.ofglyph i{display:block;background:#2F4C55}
.ofglyph i:nth-child(3n){background:var(--teal)}
.ofglyph i:nth-child(7n){background:var(--ochre)}
.ofglyph i:nth-child(5n){background:#5E8F86}
.ofglyph i:nth-child(11n){background:#D8C9A6}

.callout{
  background:var(--card);border:1px solid var(--rule);border-top:4px solid var(--teal);
  padding:14px 17px;margin:22px 0;font-size:15px;
}
.callout p{margin:0 0 8px;font-size:15px}
.callout p:last-child{margin:0}
.callout .label{
  font-family:var(--mono);font-size:9px;letter-spacing:.2em;text-transform:uppercase;color:var(--teal);
  display:block;margin-bottom:5px;
}
.callout.ochre{border-top-color:var(--ochre)}
.callout.ochre .label{color:var(--ochre)}

/* FAQ (open) */
.faq-item{border-top:1px solid var(--rule);padding:16px 0 4px}
.faq-item h3{margin:0 0 6px;font-size:15.5px;color:#0B3B37}
.faq-item p{font-size:16px;margin:0 0 12px;color:#2C3A46}

/* glossary */
.glossary dl{margin:0}
.glossary dt{
  font-family:var(--gothic);text-transform:uppercase;letter-spacing:.05em;font-size:14px;
  margin:16px 0 3px;color:#0B3B37;
}
.glossary dd{margin:0 0 10px;padding-bottom:10px;border-bottom:1px dotted var(--rule);font-size:15.5px;color:#2C3A46}

/* form */
.form-card{background:var(--card);border:1px solid var(--rule);padding:22px 22px 18px;margin:22px 0}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media (max-width:640px){.form-row{grid-template-columns:1fr}}
label{display:block;font-family:var(--mono);font-size:9.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin:0 0 5px}
input,select,textarea{
  width:100%;font-family:var(--serif);font-size:16px;color:var(--ink);background:#FBFCFD;
  border:1px solid var(--rule);border-radius:0;padding:9px 10px;margin-bottom:14px;
}
input:focus,select:focus,textarea:focus{outline:2px solid rgba(15,118,110,.35);border-color:var(--teal)}
textarea{min-height:142px;resize:vertical}
.check{display:flex;gap:9px;align-items:flex-start;margin:4px 0 18px;font-size:13.5px;line-height:1.5;color:var(--muted)}
.check input{width:16px;height:16px;flex:0 0 16px;margin:2px 0 0}
button{
  font-family:var(--gothic);text-transform:uppercase;letter-spacing:.12em;font-size:12.5px;
  background:var(--teal);color:#fff;border:1px solid var(--teal);padding:11px 26px;cursor:pointer;
}
button:hover{background:#0B5F59}
button:active{transform:translateY(1px)}
.form-note{font-family:var(--mono);font-size:10px;line-height:1.6;color:var(--faint);margin:12px 0 0}

/* footer */
.site-footer{background:var(--ink);color:#C9D6DE;margin-top:20px;border-top:5px solid var(--teal)}
.footer-inner{max-width:1080px;margin:0 auto;padding:34px 20px 22px;display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:30px}
@media (max-width:780px){.footer-inner{grid-template-columns:1fr;gap:20px}}
.site-footer h2{
  font-family:var(--mono);font-size:9.5px;letter-spacing:.2em;text-transform:uppercase;color:#8FA3B0;
  margin:0 0 10px;padding:0;border:0;
}
.site-footer h2::before{display:none}
.footer-brand{font-family:var(--gothic);text-transform:uppercase;letter-spacing:.12em;font-size:15px;color:#F2F6F8;margin:0 0 4px}
.footer-domain{font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;color:#8FA3B0;margin:0 0 12px}
.site-footer p{font-size:13px;line-height:1.6;margin:0 0 8px;color:#C9D6DE}
.site-footer address{font-style:normal;font-size:13px;line-height:1.65;color:#C9D6DE}
.site-footer a{color:#E4EEF2;border-bottom:1px solid rgba(228,238,242,.3)}
.site-footer a:hover{border-bottom-color:var(--ochre)}
.footer-links{list-style:none;margin:0;padding:0;font-size:13px}
.footer-links li{margin:0 0 6px}
.footer-bottom{
  border-top:1px solid #2B3945;margin-top:6px;padding:14px 20px 20px;max-width:1080px;margin-left:auto;margin-right:auto;
}
.footer-disclaimer{
  font-family:var(--mono);font-size:10.5px;line-height:1.65;color:#9FB0BC;
  border-left:3px solid var(--ochre);padding-left:11px;margin:0 0 10px;max-width:100%;
}
.copyright{font-family:var(--mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:#7C8B99;margin:0}
.footer-utility{margin-top:6px;font-family:var(--mono);font-size:9.5px;letter-spacing:.12em;text-transform:uppercase;color:#7C8B99}

/* misc */
.pill{
  display:inline-block;font-family:var(--mono);font-size:9px;letter-spacing:.13em;text-transform:uppercase;
  border:1px solid var(--rule);padding:2px 7px;color:var(--muted);background:#F7FAFB;margin-right:5px;
}
.two-col{columns:2;column-gap:30px}
@media (max-width:700px){.two-col{columns:1}}
.small{font-size:14px;color:var(--muted)}
hr{border:0;border-top:1px solid var(--rule);margin:26px 0}
.toplink{font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase}

@media print{
  .topbar,.site-footer{display:none}
  body{background:#fff}
}