.reference-hero{
  position:relative;
  max-width:100%;
  overflow-x:clip;
  border-bottom:1px solid var(--color-border-soft);
  background:linear-gradient(180deg,var(--color-hero-top),var(--color-hero-bottom));
}
.reference-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background:repeating-linear-gradient(135deg,var(--color-hatch) 0 1px,transparent 1px 18px);
  pointer-events:none;
}
.reference-hero__inner{
  position:relative;
  z-index:2;
  display:grid;
  justify-items:center;
  min-height:520px;
  align-content:center;
  padding-top:76px;
  padding-bottom:76px;
  text-align:center;
}
.reference-hero h1{
  max-width:820px;
  margin:22px auto 18px;
}
.reference-hero__lede{
  max-width:720px;
  margin-right:auto;
  margin-bottom:0;
  margin-left:auto;
  font-size:18px;
}
.reference-hero .button-row{
  justify-content:center;
  margin-top:28px;
}
.reference-facts{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:9px;
  max-width:920px;
  margin-top:34px;
}
.reference-facts span{
  display:inline-flex;
  align-items:center;
  min-height:34px;
  padding:6px 13px;
  border:1px solid var(--color-border-soft);
  border-radius:var(--radius-pill);
  background:var(--color-panel-glass);
  color:var(--color-muted);
  font-family:var(--font-mono);
  font-size:12px;
}
.reference-hero__signal{
  position:absolute;
  z-index:1;
  top:32px;
  right:max(var(--gutter),5vw);
  width:min(320px,32vw);
  color:var(--color-accent);
  opacity:.15;
}
.reference-hero__signal circle,
.reference-hero__signal path{
  fill:none;
  stroke:currentColor;
  stroke-width:7;
  stroke-linecap:round;
}
.reference-hero__routes{
  position:absolute;
  z-index:1;
  inset:0;
  width:100%;
  height:100%;
  pointer-events:none;
}
.reference-hero__routes path{
  fill:none;
  stroke:var(--color-accent-30);
  stroke-width:1;
}
.reference-layout{
  padding-top:72px;
  padding-bottom:var(--section-space);
}
.reference-intro{
  max-width:900px;
  margin:0 auto 42px;
  padding:28px;
  border:1px solid var(--color-border-soft);
  border-radius:var(--radius-md);
  background:var(--color-panel);
  box-shadow:var(--shadow-panel);
}
.reference-intro p:last-child{
  margin-bottom:0;
}
.reference-intro a,
.reference-section a{
  color:var(--color-accent);
  font-weight:700;
  text-decoration:underline;
  text-decoration-color:var(--color-accent-30);
  text-underline-offset:3px;
}
.reference-section{
  position:relative;
  max-width:960px;
  margin-right:auto;
  margin-left:auto;
  padding-top:76px;
  padding-bottom:28px;
}
.reference-section + .reference-section{
  border-top:1px solid var(--color-border);
}
.reference-section h2{
  max-width:780px;
  margin-bottom:32px;
}
.reference-section h3{
  margin-top:38px;
  margin-bottom:14px;
  color:var(--color-text);
  font-family:var(--font-body);
  font-size:23px;
  font-weight:700;
}
.reference-section p,
.reference-section li{
  font-size:16px;
  line-height:1.9;
}
.reference-section p{
  margin-bottom:22px;
}
.reference-section .callout{
  margin-top:30px;
  margin-bottom:34px;
}
.reference-section .callout p{
  font-size:15px;
  line-height:1.75;
}
.section-marker{
  margin-bottom:12px;
  color:var(--color-muted);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
}
.protocol-table td:first-child{
  font-family:var(--font-mono);
}
.reference-section .table-scroll{
  margin-top:30px;
  margin-bottom:38px;
}
.topology-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:18px;
  margin-top:34px;
  margin-bottom:38px;
}
.topology-card{
  min-width:0;
  padding:22px;
  border:1px solid var(--color-border-soft);
  border-radius:var(--radius-md);
  background:var(--color-panel);
  box-shadow:var(--shadow-panel);
}
.topology-card__tag{
  display:inline-flex;
  padding:4px 10px;
  border-radius:var(--radius-pill);
  background:var(--color-lilac);
  color:var(--color-accent);
  font-family:var(--font-mono);
  font-size:11px;
}
.topology-card h3{
  margin-top:18px;
  margin-bottom:10px;
  font-size:18px;
}
.topology-card p{
  margin-bottom:0;
  font-size:14px;
  line-height:1.75;
}
.diagnostic-flow{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:1px;
  margin-top:34px;
  margin-bottom:40px;
  overflow:hidden;
  border:1px solid var(--color-border);
  border-radius:var(--radius-md);
  background:var(--color-border);
}
.diagnostic-flow div{
  min-width:0;
  padding:22px;
  background:var(--color-panel);
}
.diagnostic-flow span{
  display:block;
  margin-bottom:10px;
  color:var(--color-accent);
  font-family:var(--font-mono);
  font-size:11px;
}
.diagnostic-flow strong{
  display:block;
  margin-bottom:8px;
}
.diagnostic-flow p{
  margin-bottom:0;
  font-size:13px;
  line-height:1.7;
}
.reference-note{
  margin-top:34px;
  margin-bottom:40px;
  padding:28px;
  border:1px solid var(--color-border-soft);
  border-radius:var(--radius-lg);
  background:var(--color-slot);
}
.reference-note h3{
  margin-top:0;
}
.reference-note dl{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:14px;
  margin-bottom:0;
}
.reference-note dl div{
  min-width:0;
  padding:18px;
  border-radius:var(--radius-sm);
  background:var(--color-panel);
}
.reference-note dt{
  margin-bottom:6px;
  color:var(--color-accent);
  font-weight:700;
}
.reference-note dd{
  margin:0;
  color:var(--color-muted);
}
@media (max-width:900px){
  .topology-grid{
    grid-template-columns:minmax(0,1fr);
  }
  .diagnostic-flow{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
}
@media (max-width:768px){
  .reference-hero__inner{
    min-height:0;
    padding-top:64px;
    padding-bottom:64px;
  }
  .reference-hero__lede{
    font-size:16px;
  }
  .reference-hero__signal{
    display:none;
  }
  .reference-layout{
    padding-top:54px;
  }
  .reference-section{
    padding-top:60px;
  }
  .reference-section h3{
    font-size:21px;
  }
  .reference-section p,
  .reference-section li{
    font-size:15px;
    line-height:1.82;
  }
}
@media (max-width:640px){
  .reference-hero__routes{
    opacity:.45;
  }
  .reference-facts{
    align-items:stretch;
    flex-direction:column;
    width:100%;
  }
  .reference-facts span{
    justify-content:center;
    white-space:normal;
  }
  .reference-intro{
    padding:20px;
  }
  .diagnostic-flow,
  .reference-note dl{
    grid-template-columns:minmax(0,1fr);
  }
  .reference-note{
    padding:20px;
  }
}
@media (prefers-reduced-motion:reduce){
  .reference-hero__signal,
  .reference-hero__routes{
    transform:none;
  }
}