/*=====================================================================
 * The Router From Hell — stylesheet
 * Concept: an abyssal aquarium lit by one ember. Deep teal-black water,
 * cyan foam for the glow of moving data, and a single hellfire orange
 * reserved for the hub and the things that matter most.
 * Copyright (C) 2026 Max. GNU GPL v3 or later.
 *===================================================================*/

:root{
  --abyss:#071013;      /* page background, deepest water */
  --tank:#0c1c21;       /* panel surface */
  --tank-2:#123039;     /* raised / hover */
  --brine:#0f4c5c;      /* structural teal (heritage from the specs page) */
  --line:#1c3b43;       /* hairline borders */
  --foam:#79d2c6;       /* links, water glow */
  --foam-dim:#4f9c95;
  --ember:#ff5a1f;      /* THE accent — used with restraint */
  --ember-dim:#c8451a;
  --ash:#9fb4b8;        /* body text */
  --bone:#eef6f5;       /* headings */
  --ok:#57c98a;
  --warn:#e8b04b;
  --dead:#7a8a8d;

  --mono:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,monospace;
  --disp:'Chakra Petch',system-ui,sans-serif;
  --body:'Inter',system-ui,sans-serif;

  --maxw:1120px;
  --r:12px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--abyss);color:var(--ash);
  font-family:var(--body);font-size:16px;line-height:1.65;
  -webkit-font-smoothing:antialiased;
  background-image:
    radial-gradient(900px 500px at 78% -8%, rgba(15,76,92,.34), transparent 60%),
    radial-gradient(700px 420px at 6% 4%, rgba(255,90,31,.06), transparent 55%);
  background-attachment:fixed;
}
a{color:var(--foam);text-decoration:none}
a:hover{color:var(--bone)}
h1,h2,h3,h4{font-family:var(--disp);color:var(--bone);line-height:1.12;margin:0 0 .4em}
h1{font-size:clamp(2.1rem,5vw,3.4rem);font-weight:700;letter-spacing:-.01em}
h2{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:600}
h3{font-size:1.15rem;font-weight:600}
p{margin:0 0 1rem}
code,.mono{font-family:var(--mono)}
strong{color:var(--bone)}

.skip{position:absolute;left:-999px;top:0;background:var(--ember);color:#160600;
  padding:.5rem .9rem;border-radius:0 0 8px 0;z-index:200}
.skip:focus{left:0}

/* ---------- top bar ---------- */
.topbar{position:sticky;top:0;z-index:100;display:flex;align-items:center;gap:1.2rem;
  padding:.7rem clamp(1rem,4vw,2rem);
  background:rgba(7,16,19,.86);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:baseline;gap:.55rem;color:var(--bone);white-space:nowrap}
.brand-mark{color:var(--ember);font-size:.85rem;transform:translateY(-1px)}
.brand-name{font-family:var(--disp);font-weight:700;letter-spacing:.02em}
.brand-sub{font-family:var(--mono);font-size:.72rem;color:var(--foam-dim)}
.nav{display:flex;gap:.25rem;margin-left:auto;flex-wrap:wrap}
.nav a{font-family:var(--mono);font-size:.8rem;color:var(--ash);
  padding:.35rem .6rem;border-radius:7px;letter-spacing:.01em}
.nav a:hover{background:var(--tank-2);color:var(--bone)}
.nav a.is-active{color:var(--ember);background:rgba(255,90,31,.08)}
.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--line);
  color:var(--foam);font-size:1.1rem;border-radius:8px;padding:.25rem .55rem;cursor:pointer}

/* ---------- layout primitives ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 clamp(1rem,4vw,2rem)}
section.band{padding:clamp(2.4rem,5vw,4rem) 0;border-bottom:1px solid var(--line)}
.eyebrow{font-family:var(--mono);font-size:.74rem;letter-spacing:.22em;
  text-transform:uppercase;color:var(--foam-dim);margin:0 0 .8rem;display:flex;
  align-items:center;gap:.55rem}
.eyebrow::before{content:"";width:14px;height:2px;background:var(--ember);display:inline-block}
.lede{font-size:1.12rem;max-width:64ch;color:var(--ash)}

/* ---------- hero ---------- */
.hero{position:relative;padding:clamp(2.5rem,6vw,4.5rem) 0 1rem}
.hero .kicker{font-family:var(--mono);color:var(--ember);font-size:.8rem;
  letter-spacing:.2em;text-transform:uppercase;margin-bottom:1rem}
.hero h1 .thin{color:var(--foam);font-weight:500}
.hero-stats{display:flex;flex-wrap:wrap;gap:2rem;margin-top:1.6rem}
.hero-stats .stat{display:flex;flex-direction:column}
.hero-stats .num{font-family:var(--disp);font-size:1.9rem;color:var(--bone);font-weight:700;line-height:1}
.hero-stats .lbl{font-family:var(--mono);font-size:.72rem;color:var(--foam-dim);
  text-transform:uppercase;letter-spacing:.12em;margin-top:.35rem}

/* ---------- topology ---------- */
.topo-wrap{position:relative;margin:1.6rem 0 .5rem;border:1px solid var(--line);
  border-radius:var(--r);background:
    linear-gradient(180deg,rgba(18,48,57,.35),rgba(7,16,19,.2));
  padding:.5rem}
#topo{width:100%;height:auto;display:block}
.node-shape{fill:var(--tank);stroke:var(--brine);stroke-width:1.5}
.node-title{fill:var(--bone);font-family:var(--disp);font-weight:600;font-size:15px;
  text-anchor:middle}
.node-sub{fill:var(--foam-dim);font-family:var(--mono);font-size:10px;text-anchor:middle}
.node-hub .node-shape{fill:#20100a;stroke:var(--ember);stroke-width:2;filter:url(#glow)}
.node-hub .node-title{fill:#ffd9c7}
.node-hub .node-sub{fill:var(--ember)}
.node-cloud .node-shape{fill:none;stroke:var(--line);stroke-dasharray:4 4}
.node-plan .node-shape{stroke:var(--warn);stroke-dasharray:5 4;fill:rgba(232,176,75,.05)}
.node-plan .node-sub{fill:var(--warn)}
.node-sw .node-shape{stroke:var(--foam-dim)}
.node-srv .node-shape{stroke:var(--foam)}
.node-link{cursor:pointer;transition:transform .12s ease}
.node-link:focus{outline:none}
.node-link:focus .node-shape,.node.hot .node-shape{stroke:var(--foam);stroke-width:2.5}
.node-hub.hot .node-shape,.node-hub .node-link:focus .node-shape{stroke:#ffb08a}
.node-link:hover .node-title{fill:var(--foam)}

.edge{stroke:var(--brine);stroke-width:1.6;opacity:.65}
.edge-wan{stroke:var(--foam-dim);stroke-width:2.2}
.edge-wg{stroke:var(--ember-dim);stroke-width:2;stroke-dasharray:6 6;
  animation:flow 1.1s linear infinite}
.edge-lan{stroke:var(--foam-dim)}
.edge-plan{stroke:var(--warn);stroke-dasharray:4 5;opacity:.5}
.edge.lit{stroke:var(--foam);opacity:1;stroke-width:2.6}
.edge-label{fill:var(--foam-dim);font-family:var(--mono);font-size:9px;text-anchor:middle;
  opacity:.75;pointer-events:none}
@keyframes flow{to{stroke-dashoffset:-24}}

.topo-legend{display:flex;flex-wrap:wrap;gap:1rem;padding:.6rem .3rem 0;
  font-family:var(--mono);font-size:.72rem;color:var(--foam-dim)}
.topo-legend span{display:inline-flex;align-items:center;gap:.4rem}
.swatch{width:20px;height:0;border-top-width:2px;border-top-style:solid;display:inline-block}
.sw-wg{border-color:var(--ember-dim);border-top-style:dashed}
.sw-lan{border-color:var(--foam-dim)}
.sw-wan{border-color:var(--foam-dim);border-top-width:3px}
.sw-plan{border-color:var(--warn);border-top-style:dashed}

.topo-hint{font-family:var(--mono);font-size:.72rem;color:var(--foam-dim);margin-top:.4rem}

/* device readout injected by JS */
.topo-readout{margin-top:1rem;border:1px solid var(--line);border-radius:var(--r);
  background:var(--tank);padding:1rem 1.1rem;min-height:64px}
.topo-readout .ro-name{font-family:var(--disp);color:var(--bone);font-size:1.1rem}
.topo-readout .ro-meta{font-family:var(--mono);font-size:.78rem;color:var(--foam)}
.topo-readout .ro-idle{color:var(--foam-dim);font-family:var(--mono);font-size:.82rem}

/* ---------- cards ---------- */
.grid{display:grid;gap:1rem}
.grid.cols-2{grid-template-columns:repeat(2,1fr)}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
.grid.cols-4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--tank);border:1px solid var(--line);border-radius:var(--r);
  padding:1.15rem 1.2rem;transition:border-color .15s ease,transform .15s ease}
.card:hover{border-color:var(--brine)}
.card h3{margin-bottom:.3rem}
.card .k{font-family:var(--mono);font-size:.72rem;color:var(--foam-dim);
  text-transform:uppercase;letter-spacing:.1em}
.card p{font-size:.95rem;margin-bottom:0}
.card-link{display:block;color:inherit}
.card-link:hover{color:inherit;transform:translateY(-2px)}
.card-link:hover h3{color:var(--foam)}

/* stat card */
.statcard{background:var(--tank);border:1px solid var(--line);border-radius:var(--r);
  padding:1rem 1.1rem}
.statcard .num{font-family:var(--disp);font-size:1.7rem;color:var(--ember);font-weight:700;line-height:1}
.statcard .lbl{font-family:var(--mono);font-size:.72rem;color:var(--foam-dim);
  text-transform:uppercase;letter-spacing:.1em;margin-top:.35rem}

/* ---------- pills ---------- */
.pill{font-family:var(--mono);font-size:.68rem;text-transform:uppercase;letter-spacing:.08em;
  padding:.14rem .5rem;border-radius:999px;border:1px solid transparent;white-space:nowrap}
.pill-ok{color:var(--ok);border-color:rgba(87,201,138,.4);background:rgba(87,201,138,.08)}
.pill-warn{color:var(--warn);border-color:rgba(232,176,75,.4);background:rgba(232,176,75,.08)}
.pill-dead{color:var(--dead);border-color:rgba(122,138,141,.4);background:rgba(122,138,141,.07)}
.pill-muted{color:var(--ash);border-color:var(--line)}

/* ---------- tables ---------- */
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);background:var(--tank)}
table.data{width:100%;border-collapse:collapse;font-size:.86rem}
table.data th,table.data td{padding:.55rem .8rem;text-align:left;
  border-bottom:1px solid var(--line);vertical-align:top}
table.data thead th{font-family:var(--mono);font-size:.7rem;text-transform:uppercase;
  letter-spacing:.1em;color:var(--foam-dim);background:rgba(15,76,92,.14);position:sticky;top:0}
table.data td.mono,table.data td .mono{font-family:var(--mono);color:var(--foam)}
table.data tbody tr:hover{background:rgba(18,48,57,.4)}
table.data tbody tr:last-child td{border-bottom:none}
.ip{font-family:var(--mono);color:var(--foam)}

/* ---------- controls (filters/search) ---------- */
.controls{display:flex;flex-wrap:wrap;gap:.5rem;margin:1rem 0 1.2rem;align-items:center}
.controls input[type=search]{background:var(--tank);border:1px solid var(--line);color:var(--bone);
  font-family:var(--mono);font-size:.85rem;padding:.5rem .7rem;border-radius:8px;min-width:220px}
.controls input[type=search]:focus{outline:none;border-color:var(--foam)}
.chip{font-family:var(--mono);font-size:.75rem;padding:.35rem .7rem;border-radius:999px;
  border:1px solid var(--line);background:var(--tank);color:var(--ash);cursor:pointer}
.chip:hover{border-color:var(--foam-dim);color:var(--bone)}
.chip.active{background:rgba(255,90,31,.12);border-color:var(--ember);color:var(--ember)}
.count{font-family:var(--mono);font-size:.75rem;color:var(--foam-dim);margin-left:auto}

/* ---------- timeline (the work) ---------- */
.timeline{position:relative;margin-top:1.5rem;padding-left:1.5rem}
.timeline::before{content:"";position:absolute;left:5px;top:.4rem;bottom:.4rem;width:2px;
  background:linear-gradient(180deg,var(--ember),var(--brine))}
.tl-item{position:relative;padding:0 0 1.6rem 1.1rem}
.tl-item::before{content:"";position:absolute;left:-1.5rem;top:.35rem;width:12px;height:12px;
  border-radius:50%;background:var(--abyss);border:2px solid var(--ember)}
.tl-item h3{margin-bottom:.25rem}
.tl-item p{font-size:.95rem;margin-bottom:0;color:var(--ash)}

/* ---------- code block ---------- */
.codeblock{background:#050c0e;border:1px solid var(--line);border-left:3px solid var(--ember);
  border-radius:8px;padding:.9rem 1rem;overflow-x:auto;font-family:var(--mono);
  font-size:.82rem;color:#cfe8e4;line-height:1.55;margin:.5rem 0 1.2rem;white-space:pre}
.codeblock .cmt{color:var(--foam-dim)}
.codeblock .em{color:var(--ember)}

/* ---------- misc content ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:1.4rem;align-items:start}
.notice{border:1px solid var(--line);border-left:3px solid var(--foam);background:var(--tank);
  border-radius:8px;padding:.9rem 1.1rem;font-size:.92rem}
.notice.warn{border-left-color:var(--warn)}
.notice.ember{border-left-color:var(--ember)}
ul.clean{list-style:none;padding:0;margin:0}
ul.clean li{padding:.55rem 0 .55rem 1.4rem;position:relative;border-bottom:1px solid var(--line)}
ul.clean li:last-child{border-bottom:none}
ul.clean li::before{content:"\203A";position:absolute;left:0;color:var(--ember);font-weight:700}
.tagline{font-family:var(--mono);color:var(--foam-dim);font-size:.8rem}
.backlink{font-family:var(--mono);font-size:.8rem}

/* ---------- footer ---------- */
.sitefoot{padding:2.5rem clamp(1rem,4vw,2rem) 2rem;background:#050c0e;border-top:1px solid var(--line)}
.foot-grid{max-width:var(--maxw);margin:0 auto;display:grid;grid-template-columns:1.4fr 1fr 1.6fr;
  gap:1.6rem}
.foot-lead{font-family:var(--disp);color:var(--bone);font-size:1.1rem;margin-bottom:.2rem}
.foot-dim{color:var(--foam-dim);font-size:.85rem}
.foot-label{font-family:var(--mono);font-size:.7rem;text-transform:uppercase;letter-spacing:.12em;
  color:var(--foam-dim);margin-bottom:.3rem}
.foot-grid p{font-size:.9rem;margin-bottom:0}
.foot-copy{max-width:var(--maxw);margin:1.6rem auto 0;font-family:var(--mono);font-size:.75rem;
  color:var(--dead);border-top:1px solid var(--line);padding-top:1rem}

/* ---------- responsive ---------- */
@media(max-width:860px){
  .nav{display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;
    background:var(--abyss);border-bottom:1px solid var(--line);padding:.5rem 1rem 1rem}
  .nav.open{display:flex}
  .nav-toggle{display:inline-block}
  .grid.cols-3,.grid.cols-4{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
}
@media(max-width:520px){
  .grid.cols-2,.grid.cols-3,.grid.cols-4{grid-template-columns:1fr}
  .hero-stats{gap:1.2rem}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;scroll-behavior:auto!important;transition:none!important}
}