/* ══════════════════════════════════════════════════════════════════
   hollowgrid — main stylesheet
   Dark-only by design. Mono-forward. Grid is the motif.
   ══════════════════════════════════════════════════════════════════ */

:root {
  /* surface */
  --bg:        #06080b;
  --bg-soft:   #0a0e13;
  --panel:     #0d1219;
  --panel-hi:  #121822;
  --line:      #1b2531;
  --line-hi:   #2a3846;

  /* ink */
  --ink:       #d7e3ee;
  --ink-dim:   #7d8fa3;
  --ink-faint: #4a5a6b;

  /* signal */
  --acc:       #a78bfa;   /* violet — primary */
  --acc-deep:  #8b5cf6;
  --acc-2:     #e879f9;   /* fuchsia — secondary */
  --amb:       #fbbf24;   /* amber — warn */
  --red:       #f87171;

  --acc-glow:  rgba(167, 139, 250, .16);

  --mono: ui-monospace, "SF Mono", SFMono-Regular, "JetBrains Mono",
          "Cascadia Mono", Menlo, Consolas, monospace;

  --gut:  clamp(1.25rem, 4vw, 4rem);
  --maxw: 78rem;

  --ease: cubic-bezier(.22, 1, .36, 1);
}

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

/* the nav is fixed, so jump targets must stop clear of it
   instead of sliding underneath */
:target,
section[id],
main[id] { scroll-margin-top: 5rem; }

body {
  margin: 0;
  min-height: 100svh;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--mono);
  font-size: clamp(.875rem, .82rem + .2vw, .95rem);
  line-height: 1.7;
  letter-spacing: .01em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

body.is-booting { overflow: hidden; }

h1, h2, h3 { font-weight: 600; letter-spacing: -.02em; line-height: 1.15; margin: 0; }
p { margin: 0 0 1rem; }
a { color: var(--acc); text-decoration: none; }
code { color: var(--acc); background: var(--panel); padding: .1em .4em; border-radius: 3px; }

::selection { background: var(--acc); color: var(--bg); }

:focus-visible {
  outline: 2px solid var(--acc);
  outline-offset: 3px;
  border-radius: 2px;
}

.muted  { color: var(--ink-dim); }
.ok     { color: var(--acc); }

/* ─── background layers ──────────────────────────────────────────── */

.lattice {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.scanlines {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: .35;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0 3px,
    rgba(0, 0, 0, .28) 3px 4px
  );
  mix-blend-mode: multiply;
}

/* radial vignette so content stays readable over the lattice */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: radial-gradient(
    120% 80% at 50% 0%,
    transparent 0%,
    rgba(6, 8, 11, .55) 55%,
    rgba(6, 8, 11, .9) 100%
  );
}

main, .nav, .foot { position: relative; z-index: 2; }

/* ─── boot sequence ──────────────────────────────────────────────── */

.boot {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  background: var(--bg);
  transition: opacity .7s var(--ease), visibility .7s;
}
.boot.is-done { opacity: 0; visibility: hidden; }

.boot__inner {
  width: min(46rem, 88vw);
  padding: var(--gut);
}

.boot__mark {
  margin: 0 0 1.75rem;
  color: var(--acc);
  font-size: clamp(.7rem, 2.4vw, .95rem);
  line-height: 1.35;
  text-shadow: 0 0 22px var(--acc-glow);
}

.boot__log {
  min-height: 11rem;
  color: var(--ink-dim);
  font-size: .8rem;
  line-height: 1.85;
}
.boot__log b { color: var(--ink); font-weight: 400; }
.boot__log .ok { color: var(--acc); }

.boot__bar {
  height: 2px;
  margin-top: 1.5rem;
  background: var(--line);
  overflow: hidden;
}
.boot__bar span {
  display: block;
  height: 100%;
  width: 0;
  background: var(--acc);
  box-shadow: 0 0 12px var(--acc);
  transition: width .25s linear;
}

.boot__skip {
  margin-top: 1.5rem;
  padding: .4rem .9rem;
  background: none;
  border: 1px solid var(--line-hi);
  color: var(--ink-dim);
  font: inherit;
  font-size: .75rem;
  cursor: pointer;
  transition: color .2s, border-color .2s;
}
.boot__skip:hover { color: var(--acc); border-color: var(--acc); }

/* ─── nav ────────────────────────────────────────────────────────── */

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: .85rem var(--gut);
  font-size: .78rem;
  border-bottom: 1px solid transparent;
  transition: background .35s, border-color .35s, backdrop-filter .35s;
}
.nav.is-stuck {
  background: rgba(6, 8, 11, .82);
  backdrop-filter: blur(14px);
  border-bottom-color: var(--line);
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: .55rem;
  color: var(--ink);
  font-weight: 600;
  letter-spacing: .04em;
}
.nav__glyph { color: var(--acc); }

.nav__links {
  display: flex;
  gap: 1.5rem;
  margin-left: auto;
}
.nav__links a {
  position: relative;
  color: var(--ink-dim);
  transition: color .2s;
}
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -4px;
  width: 100%; height: 1px;
  background: var(--acc);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform .35s var(--ease);
}
.nav__links a:hover, .nav__links a.is-active { color: var(--acc); }
.nav__links a:hover::after, .nav__links a.is-active::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav__status {
  display: flex;
  align-items: center;
  gap: .5rem;
  color: var(--ink-faint);
  font-variant-numeric: tabular-nums;
}

.led {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--ink-faint);
  flex: none;
}
.led[data-state="up"]   { background: var(--acc); box-shadow: 0 0 8px var(--acc); animation: pulse 2.4s ease-in-out infinite; }
.led[data-state="warn"] { background: var(--amb); box-shadow: 0 0 8px var(--amb); }
.led[data-state="idle"] { background: var(--ink-faint); }

@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .35; } }

/* ─── hero ───────────────────────────────────────────────────────── */

.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  align-items: center;
  padding: 7rem var(--gut) 5rem;
}

.hero__grid {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  margin: 0 0 1.5rem;
  padding: .3rem .75rem;
  border: 1px solid var(--line);
  background: rgba(13, 18, 25, .6);
  color: var(--ink-dim);
  font-size: .72rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.eyebrow__tick {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--acc);
  box-shadow: 0 0 8px var(--acc);
  animation: pulse 2s ease-in-out infinite;
}

.hero__title {
  font-size: clamp(3rem, 12vw, 8.5rem);
  letter-spacing: -.045em;
  line-height: .92;
  margin-bottom: .75rem;
}
.scramble {
  background: linear-gradient(100deg, var(--ink) 30%, var(--acc) 60%, var(--acc-2) 90%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__role {
  min-height: 1.9em;
  margin-bottom: 1.5rem;
  color: var(--acc);
  font-size: clamp(.9rem, 2.2vw, 1.15rem);
  letter-spacing: .02em;
}
.caret {
  display: inline-block;
  width: .55em; height: 1.05em;
  margin-left: .15em;
  background: var(--acc);
  vertical-align: text-bottom;
  animation: blink 1.1s steps(1) infinite;
}
@keyframes blink { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0; } }

.hero__lede {
  max-width: 46ch;
  color: var(--ink-dim);
  font-size: .95rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin: 2rem 0 3.5rem;
}

.btn {
  --btn-c: var(--ink);
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .7rem 1.4rem;
  border: 1px solid var(--line-hi);
  color: var(--btn-c);
  font-size: .8rem;
  letter-spacing: .04em;
  overflow: hidden;
  transition: color .3s, border-color .3s;
}
.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--acc);
  transform: translateY(101%);
  transition: transform .4s var(--ease);
  z-index: -1;
}
.btn:hover { color: var(--bg); border-color: var(--acc); }
.btn:hover::before { transform: translateY(0); }
.btn--primary { border-color: var(--acc); color: var(--acc); }

.hero__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(7rem, 1fr));
  gap: 1px;
  margin: 0;
  max-width: 42rem;
  background: var(--line);
  border: 1px solid var(--line);
}
.hero__stats > div {
  padding: .9rem 1.1rem;
  background: rgba(10, 14, 19, .75);
}
.hero__stats dt {
  color: var(--ink-faint);
  font-size: .68rem;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.hero__stats dd {
  margin: .25rem 0 0;
  color: var(--acc);
  font-size: 1.5rem;
  font-variant-numeric: tabular-nums;
}

.hero__scroll {
  position: absolute;
  left: 50%; bottom: 2rem;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .6rem;
  color: var(--ink-faint);
  font-size: .68rem;
  letter-spacing: .18em;
  text-transform: uppercase;
}
.hero__scroll i {
  width: 1px; height: 2.5rem;
  background: linear-gradient(var(--acc), transparent);
  animation: drop 2.2s ease-in-out infinite;
}
@keyframes drop {
  0%   { transform: scaleY(0); transform-origin: top; }
  50%  { transform: scaleY(1); transform-origin: top; }
  51%  { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ─── section shell ──────────────────────────────────────────────── */

.section {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(4rem, 10vw, 8rem) var(--gut);
}

.section__head {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 2rem;
}
.section__idx {
  color: var(--acc);
  font-size: .75rem;
  letter-spacing: .1em;
}
.section__head h2 {
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  letter-spacing: -.03em;
}
.section__rule {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--line-hi), transparent);
}

.section__note {
  margin-bottom: 2rem;
  color: var(--ink-faint);
  font-size: .8rem;
}

/* reveal-on-scroll */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
}
[data-reveal].is-in { opacity: 1; transform: none; }

/* ─── briefing ───────────────────────────────────────────────────── */

.briefing {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}
.lead {
  color: var(--ink);
  font-size: clamp(1rem, 2.4vw, 1.25rem);
  line-height: 1.55;
  letter-spacing: -.015em;
  border-left: 2px solid var(--acc);
  padding-left: 1.25rem;
  margin-bottom: 1.75rem;
}
.briefing__lead p:not(.lead) { color: var(--ink-dim); max-width: 58ch; }

.facts {
  list-style: none;
  margin: 0;
  padding: 0;
  border: 1px solid var(--line);
  background: rgba(13, 18, 25, .5);
}
.facts li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: .75rem 1rem;
  border-bottom: 1px solid var(--line);
  font-size: .8rem;
}
.facts li:last-child { border-bottom: 0; }
.facts span { color: var(--ink-faint); letter-spacing: .08em; text-transform: uppercase; font-size: .68rem; }
.facts b { font-weight: 500; text-align: right; }

/* ─── stack cells ────────────────────────────────────────────────── */

.cells {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.cell {
  position: relative;
  padding: 1.4rem 1.25rem;
  background: var(--bg-soft);
  overflow: hidden;
  transition: background .35s var(--ease);
}
.cell::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    18rem circle at var(--mx, 50%) var(--my, 50%),
    var(--acc-glow),
    transparent 65%
  );
  opacity: 0;
  transition: opacity .35s;
}
/* :hover variants live in the (hover: hover) block near the breakpoints */

.cell h3 {
  position: relative;
  margin-bottom: .5rem;
  font-size: 1rem;
  letter-spacing: -.01em;
}
.cell h3::after {
  content: "";
  display: block;
  width: 1.5rem; height: 1px;
  margin-top: .6rem;
  background: var(--acc);
  transition: width .4s var(--ease);
}

.cell p {
  position: relative;
  margin: 0;
  color: var(--ink-dim);
  font-size: .78rem;
  line-height: 1.65;
}

/* ─── rack ───────────────────────────────────────────────────────── */

.rack {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}

.rack__frame {
  display: flex;
  flex-direction: column;
  gap: .5rem;
  padding: 1rem;
  border: 1px solid var(--line-hi);
  background:
    linear-gradient(rgba(13, 18, 25, .8), rgba(13, 18, 25, .8)),
    repeating-linear-gradient(to bottom, transparent 0 11px, var(--line) 11px 12px);
}

.unit {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "leds name"
    "leds spec";
  gap: 0 .9rem;
  padding: .85rem 1rem;
  border: 1px solid var(--line);
  border-left: 2px solid var(--line-hi);
  background: var(--panel);
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: transform .45s var(--ease), border-color .3s, background .3s;
}
.unit.is-out {
  transform: translateX(clamp(1rem, 4vw, 2.5rem));
  border-left-color: var(--acc);
  background: var(--panel-hi);
  box-shadow: -12px 0 32px -18px var(--acc);
}

.unit__leds { grid-area: leds; display: flex; flex-direction: column; gap: 5px; padding-top: .35rem; }
.unit__name { grid-area: name; font-size: .9rem; letter-spacing: .02em; }
.unit__spec { grid-area: spec; color: var(--ink-faint); font-size: .72rem; }

.rack__detail {
  position: sticky;
  top: 5rem;
  min-height: 12rem;
  padding: 1.5rem;
  border: 1px solid var(--line);
  background: rgba(10, 14, 19, .7);
}
.rack__hint { margin: 0; color: var(--ink-faint); font-size: .8rem; }
.rack__detail h3 { margin-bottom: .75rem; font-size: 1.05rem; color: var(--acc); }
.rack__detail dl { display: grid; grid-template-columns: auto 1fr; gap: .4rem 1rem; margin: 0; font-size: .78rem; }
.rack__detail dt { color: var(--ink-faint); }
.rack__detail dd { margin: 0; text-align: right; }

.rack__label {
  margin: .9rem 0 .1rem;
  padding-left: .2rem;
  color: var(--ink-faint);
  font-size: .65rem;
  letter-spacing: .18em;
  text-transform: uppercase;
}
.rack__label:first-child { margin-top: 0; }

/* ─── network topology ───────────────────────────────────────────── */

.sub {
  margin: 3rem 0 1rem;
  color: var(--ink-dim);
  font-size: .7rem;
  letter-spacing: .18em;
  text-transform: uppercase;
}

.topo {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 17rem;
  gap: clamp(1rem, 3vw, 2rem);
  align-items: start;
}

/* the diagram keeps its aspect ratio and scrolls sideways on narrow screens */
.topo__canvas {
  overflow-x: auto;
  border: 1px solid var(--line);
  background:
    linear-gradient(rgba(8, 11, 15, .6), rgba(8, 11, 15, .6)),
    radial-gradient(90% 60% at 50% 0%, rgba(167, 139, 250, .07), transparent 70%);
  scrollbar-width: thin;
  scrollbar-color: var(--line-hi) transparent;
}
.topo__canvas svg {
  display: block;
  width: 100%;
  min-width: 44rem;
  height: auto;
}

/* links */
.topo__links .lnk {
  stroke: var(--line-hi);
  stroke-width: 1.5;
  transition: stroke .35s, opacity .35s;
}
.topo__links .lnk--virtual { stroke-dasharray: 4 5; }

/* the travelling pulse */
.topo__flow path {
  stroke: var(--acc);
  stroke-width: 1.5;
  stroke-dasharray: 14 190;
  opacity: .8;
  animation: flow 3.4s linear infinite;
}
.topo__flow path:nth-child(2) { animation-delay: .35s; }
.topo__flow path:nth-child(3) { animation-delay: .7s; }
.topo__flow path:nth-child(4) { animation-delay: .9s; animation-duration: 4.6s; }
.topo__flow path:nth-child(5),
.topo__flow path:nth-child(6),
.topo__flow path:nth-child(7),
.topo__flow path:nth-child(8) { animation-delay: 1.5s; }

@keyframes flow {
  from { stroke-dashoffset: 204; }
  to   { stroke-dashoffset: 0; }
}

/* the "these two cannot talk" marker between the internal and DMZ stacks */
.barrier__line {
  stroke: var(--red);
  stroke-width: 1.5;
  stroke-dasharray: 3 4;
  opacity: .75;
  fill: none;
}
.barrier__x {
  stroke: var(--red);
  stroke-width: 2;
  stroke-linecap: round;
  fill: none;
}
.barrier__t {
  fill: var(--red);
  font-family: var(--mono);
  font-size: 10px;
  text-anchor: middle;
  opacity: .85;
}
/* the barrier is the point of that tier — never dim it */
.topo.is-tracing .barrier { opacity: 1; }

/* edge labels */
.topo__edge text {
  fill: var(--ink-faint);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .06em;
}

/* nodes */
.node { cursor: pointer; }
.node rect {
  fill: var(--panel);
  stroke: var(--line-hi);
  stroke-width: 1;
  transition: fill .3s, stroke .3s;
}
.node__t {
  fill: var(--ink);
  font-family: var(--mono);
  font-size: 14px;
  text-anchor: middle;
  letter-spacing: -.01em;
}
.node__s {
  fill: var(--ink-faint);
  font-family: var(--mono);
  font-size: 11px;
  text-anchor: middle;
}
.node--cloud rect { fill: none; stroke-dasharray: 4 4; }
.node--core rect  { fill: var(--panel-hi); stroke: var(--acc-deep); }
.node--core .node__t { fill: var(--acc); }
.node--group rect { fill: rgba(13, 18, 25, .6); }
.node--virtual rect { stroke-dasharray: 4 5; }

/* service names listed inside a stack */
.node__svc {
  fill: var(--acc);
  font-family: var(--mono);
  font-size: 11px;
  text-anchor: middle;
  opacity: .8;
}

.node .chip rect { fill: var(--bg-soft); stroke: var(--line); }
.node .chip text {
  fill: var(--ink-dim);
  font-family: var(--mono);
  font-size: 11px;
  text-anchor: middle;
}

.node:hover rect,
.node:focus-visible rect,
.node.is-sel rect {
  stroke: var(--acc);
  fill: var(--panel-hi);
}
.node:focus-visible { outline: none; }
.node:focus-visible rect { stroke-width: 2; }

/* three tiers while tracing: selected → on the path → everything else */
.topo.is-tracing .node:not(.is-sel):not(.is-path) { opacity: .22; }
.topo.is-tracing .node.is-path      { opacity: .75; }
.topo.is-tracing .node.is-path rect { stroke: var(--acc-deep); }
.topo.is-tracing .node.is-sel rect  { stroke: var(--acc); stroke-width: 2; }
.topo.is-tracing .lnk:not(.is-path) { opacity: .15; }
.topo.is-tracing .lnk.is-path       { stroke: var(--acc); }
.topo.is-tracing .topo__flow        { opacity: 0; }
.topo .node, .topo .topo__flow, .topo .lnk { transition: opacity .35s, stroke .35s; }

.topo__detail {
  position: sticky;
  top: 5rem;
  min-height: 12rem;
  padding: 1.25rem;
  border: 1px solid var(--line);
  background: rgba(10, 14, 19, .7);
}
.topo__detail h3 { margin-bottom: .35rem; font-size: 1rem; color: var(--acc); }
.topo__detail .topo__role {
  margin-bottom: .9rem;
  color: var(--ink-faint);
  font-size: .7rem;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.topo__detail ul { margin: 0; padding-left: 1rem; font-size: .78rem; color: var(--ink-dim); }
.topo__detail li { margin-bottom: .3rem; }

/* ─── vlan table ─────────────────────────────────────────────────── */

.vlans { overflow-x: auto; border: 1px solid var(--line); }
.vlans table { width: 100%; border-collapse: collapse; font-size: .8rem; }
.vlans th, .vlans td {
  padding: .6rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
.vlans thead th {
  color: var(--ink-faint);
  font-weight: 400;
  font-size: .68rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  background: var(--panel);
}
.vlans tbody tr { transition: background .25s; }
.vlans tbody tr:last-child td { border-bottom: 0; }
.vlans td:first-child { color: var(--acc); }
.vlans td:nth-child(2) { color: var(--ink-dim); }
.dim { color: var(--ink-faint); }

/* ─── rules list ─────────────────────────────────────────────────── */

.rules {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: rule;
  display: grid;
  gap: .5rem;
}
.rules li {
  counter-increment: rule;
  position: relative;
  padding: .85rem 1rem .85rem 3rem;
  border: 1px solid var(--line);
  background: var(--bg-soft);
  color: var(--ink-dim);
  font-size: .8rem;
}
.rules li::before {
  content: counter(rule, decimal-leading-zero);
  position: absolute;
  left: 1rem;
  color: var(--acc);
}
.rules b { color: var(--ink); font-weight: 500; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ─── work ───────────────────────────────────────────────────────── */

.work {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(18rem, 1fr));
  gap: 1rem;
}

.proj {
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  border: 1px solid var(--line);
  background: var(--bg-soft);
  transition: border-color .35s, transform .45s var(--ease);
}

.proj header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: .85rem;
}
.proj h3 { font-size: 1rem; }
.proj__tag {
  padding: .15rem .5rem;
  border: 1px solid var(--line-hi);
  color: var(--ink-faint);
  font-size: .65rem;
  letter-spacing: .06em;
  text-transform: uppercase;
}
.proj p { flex: 1; color: var(--ink-dim); font-size: .8rem; }
.proj footer { display: flex; flex-wrap: wrap; gap: .4rem; }
.proj footer span {
  padding: .2rem .55rem;
  background: var(--panel);
  color: var(--acc);
  font-size: .68rem;
}

/* ─── terminal ───────────────────────────────────────────────────── */

.term {
  border: 1px solid var(--line-hi);
  background: rgba(8, 11, 15, .92);
  box-shadow: 0 24px 60px -32px rgba(0, 0, 0, .9);
}

.term__bar {
  display: flex;
  align-items: center;
  gap: .9rem;
  padding: .6rem .9rem;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}
.term__dots { display: flex; gap: .4rem; }
.term__dots i { width: 9px; height: 9px; border-radius: 50%; background: var(--line-hi); }
.term__dots i:first-child { background: #3d2b2b; }
.term__title { color: var(--ink-faint); font-size: .7rem; }

.term__body {
  height: clamp(16rem, 42vh, 24rem);
  padding: 1rem;
  overflow-y: auto;
  font-size: .78rem;
  line-height: 1.75;
  scrollbar-width: thin;
  scrollbar-color: var(--line-hi) transparent;
}
.term__body::-webkit-scrollbar { width: 8px; }
.term__body::-webkit-scrollbar-thumb { background: var(--line-hi); }

.term__line { white-space: pre-wrap; word-break: break-word; }
.term__line.is-cmd  { color: var(--ink); }
.term__line.is-ok   { color: var(--acc); }
.term__line.is-warn { color: var(--amb); }
.term__line.is-err  { color: var(--red); }
.term__line.is-dim  { color: var(--ink-dim); }
.term__line b { color: var(--acc-2); font-weight: 400; }

.term__prompt {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .7rem .9rem;
  border-top: 1px solid var(--line);
}
.term__ps1 { color: var(--acc); font-size: .78rem; white-space: nowrap; }
.term__prompt input {
  flex: 1;
  min-width: 0;
  background: none;
  border: 0;
  color: var(--ink);
  font: inherit;
  font-size: .78rem;
  outline: none;
  caret-color: var(--acc);
}

/* ─── footer ─────────────────────────────────────────────────────── */

.foot {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 4rem var(--gut) 2.5rem;
  border-top: 1px solid var(--line);
}
.foot__grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 3rem;
}
.foot__mark { color: var(--acc); letter-spacing: .06em; margin-bottom: .35rem; }
.foot__links { display: flex; gap: 1.5rem; list-style: none; margin: 0; padding: 0; font-size: .8rem; }
.foot__links a { color: var(--ink-dim); transition: color .2s; }
.foot__links a:hover { color: var(--acc); }
.foot__links a[data-placeholder]::after { content: " ↗"; color: var(--ink-faint); }

.foot__legal {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  margin: 0;
  color: var(--ink-faint);
  font-size: .72rem;
}
.foot__legal a { color: var(--ink-faint); }
.foot__legal a:hover { color: var(--acc); }

/* ─── responsive ─────────────────────────────────────────────────── */

/* Hover effects are gated: on a touch screen :hover latches after a tap
   and leaves elements stuck in their hovered state. */
@media (hover: hover) {
  .cell:hover { background: var(--panel-hi); }
  .cell:hover::before { opacity: 1; }
  .cell:hover h3::after { width: 3.5rem; }
  .unit:hover { transform: translateX(6px); border-left-color: var(--acc); }
  .proj:hover { border-color: var(--line-hi); transform: translateY(-4px); }
  .vlans tbody tr:hover { background: var(--panel); }
}

/* both are revealed by the breakpoints below — declared first so the
   media queries win on source order */
.topo__hint { display: none; }
.ps1--short { display: none; }

@media (max-width: 860px) {
  .briefing, .rack, .topo { grid-template-columns: 1fr; }
  .rack__detail, .topo__detail { position: static; }
  .hero__scroll { display: none; }

  /* the nav used to vanish entirely here, leaving no way to move around.
     Now it stays on one line and the links scroll horizontally. */
  .nav { gap: 1rem; padding-inline: var(--gut); }
  .nav__status { display: none; }
  .nav__links {
    min-width: 0;
    margin-left: auto;
    gap: 1.15rem;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    scrollbar-width: none;
  }
  .nav__links::-webkit-scrollbar { display: none; }
  .nav__links a { white-space: nowrap; padding-block: .35rem; }

  /* the diagram cannot shrink below legibility, so it pans instead —
     say so, rather than letting it look clipped */
  .topo__hint {
    display: block;
    margin: 0 0 .6rem;
    color: var(--ink-faint);
    font-size: .7rem;
    letter-spacing: .06em;
  }
  .topo__canvas { position: relative; }
  .topo__canvas svg { min-width: 40rem; }

  /* long role text should wrap rather than force a wide scroll */
  .vlans td:last-child { white-space: normal; min-width: 14rem; }
}

@media (max-width: 560px) {
  .topo__canvas svg { min-width: 34rem; }

  /* label and value stack instead of being squeezed onto one line */
  .facts li { flex-direction: column; align-items: flex-start; gap: .15rem; }
  .facts b { text-align: left; }

  /* the full prompt eats most of a phone's width — swap in a short one */
  .ps1--full  { display: none; }
  .ps1--short { display: inline; }

  .hero__stats { grid-template-columns: repeat(2, 1fr); }
  .section__head { flex-wrap: wrap; gap: .5rem 1rem; }
  .proj header { flex-wrap: wrap; gap: .5rem; }
  .foot__legal { flex-direction: column; gap: .5rem; }
}

/* ─── reduced motion ─────────────────────────────────────────────── */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
  .scanlines { display: none; }
  .topo__flow { display: none; }   /* the travelling pulse is pure decoration */
}