/* ==========================================================
   NIRYANTRA — "datasheet" design system
   paper + ink + one signal colour + phosphor for screens
   ========================================================== */
:root {
  --paper: #EEF2F4;
  --paper-2: #E0E8EC;
  --ink: #0B2342;
  --ink-2: #24395A;
  --muted: #5D6E82;
  --line: rgba(11, 35, 66, .18);
  --grid: rgba(11, 35, 66, .055);
  --signal: #1597BC;
  --teal-hi: #2FC0E6;
  --grad: linear-gradient(160deg, #1AA6C8 0%, #0F6A92 45%, #0B2342 100%);
  --phos: #5CE1FF;
  --amber: #FFB020;
  --scope: #06121F;
  --mono: 'IBM Plex Mono', ui-monospace, Menlo, Consolas, monospace;
  --disp: 'Archivo', 'Arial Narrow', system-ui, sans-serif;
  --gutter: 32px;
  --night: #0B2342;      /* always-dark bands: ticker, manifesto, footer */
  --on-night: #EEF2F4;
  --shadow: #0B2342;     /* hard offset shadows */
  color-scheme: light dark;
}

/* designed dark theme — also stops phone browsers from force-inverting the page */
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #06111F;
    --paper-2: #0A1A2E;
    --ink: #E3ECF4;
    --ink-2: #B4C4D4;
    --muted: #7D93AB;
    --line: rgba(227, 236, 244, .16);
    --grid: rgba(227, 236, 244, .045);
    --signal: #2BB3DB;
    --night: #0B1F38;
    --shadow: #16365C;
  }
  .logo-mark { background: #EEF2F4; padding: 3px 4px; border-radius: 5px; box-sizing: content-box; }
  .scope { box-shadow: 0 1px 0 rgba(255,255,255,.08) inset, 14px 14px 0 var(--shadow); }
  .btn-ink:hover, .btn-line:hover { box-shadow: 3px 3px 0 var(--signal); }
  .foot-mark { -webkit-text-stroke-color: #41678F !important; }
  .foot-mark .ga-l { stroke: #41678F !important; }
  .foot:hover .foot-mark { -webkit-text-stroke-color: var(--signal) !important; }
  .foot:hover .foot-mark .ga-l { stroke: var(--signal) !important; }
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 64px; }
body {
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 28px 28px;
  color: var(--ink);
  font-family: var(--disp);
  font-size: 17px;
  line-height: 1.5;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
button { font: inherit; color: inherit; cursor: pointer; }
::selection { background: var(--signal); color: var(--paper); }

.wrap { max-width: 1380px; margin: 0 auto; padding: 0 var(--gutter); }

/* ---------- probe crosshair ---------- */
.probe { position: fixed; inset: 0; pointer-events: none; z-index: 90; opacity: 0; transition: opacity .3s; mix-blend-mode: difference; }
.probe.on { opacity: 1; }
.probe::before, .probe::after { content: ""; position: absolute; background: #fff; opacity: .22; }
.probe::before { left: var(--x, -10px); top: 0; width: 1px; height: 100%; }
.probe::after { top: var(--y, -10px); left: 0; height: 1px; width: 100%; }
.probe-label {
  position: absolute; left: 0; top: 0;
  transform: translate(calc(var(--x, -200px) + 12px), calc(var(--y, -200px) + 10px));
  font: 500 10px/1 var(--mono); letter-spacing: .08em; color: #fff; white-space: pre;
}

/* ---------- docbar ---------- */
.docbar {
  position: sticky; top: 0; z-index: 50;
  display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 24px;
  padding: 12px var(--gutter);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1.5px solid var(--ink);
  font: 500 12px/1 var(--mono); letter-spacing: .06em; text-transform: uppercase;
}
.logo-mark { height: 34px; width: auto; display: block; }
.logo { display: flex; align-items: center; gap: 12px; white-space: nowrap; text-decoration: none; font: 800 17px/1 var(--disp); font-stretch: 125%; letter-spacing: .02em; }
.docnav { display: flex; justify-content: center; gap: 4px; }
.docnav a { text-decoration: none; padding: 8px 12px; border: 1px solid transparent; display: flex; gap: 8px; align-items: center; }
.docnav a b { color: var(--signal); font-weight: 600; }
.docnav a:hover { border-color: var(--ink); background: var(--ink); color: var(--paper); }
.docmeta { color: var(--muted); }
.menu-btn { display: none; width: 44px; height: 44px; background: none; border: 1.5px solid var(--ink); flex-direction: column; justify-content: center; align-items: center; gap: 5px; justify-self: end; }
.menu-btn span { width: 20px; height: 2px; background: var(--ink); transition: transform .25s, opacity .2s; }
.menu-btn[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-btn[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-btn[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.docmeta span { color: var(--ink); }

/* ---------- sheet crop-marks ---------- */
.sheet { position: relative; }

/* ---------- hero ---------- */
.hero { padding: 48px 0 56px; }
.dict { font: 400 13px/1.4 var(--mono); color: var(--muted); margin-bottom: 18px; }
.dict b { color: var(--ink); font-weight: 600; }
.dict span { color: var(--signal); }

.wordmark {
  font-weight: 900; font-stretch: 125%;
  font-size: 160px; /* JS fits this to the container width */
  line-height: .78; letter-spacing: -.035em;
  white-space: nowrap; display: inline-block;
  user-select: none;
}
.wordmark > span { display: inline-block; transition: transform .35s cubic-bezier(.2,.9,.3,1.4), color .2s; }
.wordmark > span:hover { transform: translateY(-.06em) skewX(-6deg); color: var(--signal); }
.wordmark.boot > span { animation: rise .9s cubic-bezier(.2,.8,.2,1) backwards; }
.wordmark.boot > span:nth-child(n) { animation-delay: calc(var(--i) * 45ms); }
@keyframes rise { from { transform: translateY(40%); opacity: 0; clip-path: inset(0 0 100% 0); } to { transform: none; opacity: 1; clip-path: inset(0 0 -10% 0); } }

.dimline { display: flex; align-items: center; gap: 10px; margin: 18px 0 40px; font: 500 11px/1 var(--mono); color: var(--muted); }
.dimline span { flex: 1; height: 1px; background: var(--ink); position: relative; }
.dimline span:first-child::before, .dimline span:last-child::after { content: ""; position: absolute; top: -6px; width: 1px; height: 13px; background: var(--ink); }
.dimline span:first-child::before { left: 0; }
.dimline span:last-child::after { right: 0; }
.dimline em { font-style: normal; }

.hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr); gap: 56px; align-items: start; }
.lede { font-size: clamp(22px, 2.1vw, 30px); line-height: 1.22; font-weight: 500; font-stretch: 92%; letter-spacing: -.01em; }
.lede mark { background: linear-gradient(transparent 62%, color-mix(in srgb, var(--signal) 40%, transparent) 62%); color: inherit; }

.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 32px 0 36px; align-items: center; }
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 20px; text-decoration: none;
  font: 600 13px/1 var(--mono); letter-spacing: .06em; text-transform: uppercase;
  border: 1.5px solid var(--ink); transition: transform .15s, box-shadow .15s, background .15s;
}
.btn-ink { background: var(--ink); color: var(--paper); }
.btn-line:hover, .btn-ink:hover { transform: translate(-3px, -3px); box-shadow: 3px 3px 0 var(--signal); }

.rocker { display: inline-flex; align-items: center; gap: 10px; background: none; border: 0; padding: 4px 8px 4px 0; }
.rocker-track { width: 52px; height: 28px; border: 1.5px solid var(--ink); background: var(--paper-2); position: relative; transition: background .2s; }
.rocker-knob { position: absolute; top: 3px; left: 3px; width: 19px; height: 19px; background: var(--ink); transition: transform .25s cubic-bezier(.3,1.4,.5,1); }
.rocker[aria-pressed="true"] .rocker-track { background: var(--signal); }
.rocker[aria-pressed="true"] .rocker-knob { transform: translateX(24px); }
.rocker-label { font: 500 11px/1.2 var(--mono); letter-spacing: .08em; text-align: left; }
.rocker-label b { display: block; font-weight: 600; color: var(--signal); }

.hero-facts { list-style: none; border-top: 1.5px solid var(--ink); }
.hero-facts li { display: grid; grid-template-columns: 96px 1fr; padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 15px; }
.hero-facts span { font: 500 11px/1.9 var(--mono); color: var(--muted); letter-spacing: .08em; }

/* ---------- oscilloscope ---------- */
.scope { background: #0E2238; color: #C4D3E2; padding: 14px; border-radius: 6px; box-shadow: 0 1px 0 #fff inset, 14px 14px 0 var(--shadow); position: relative; }
.scope-top { display: flex; justify-content: space-between; align-items: center; font: 500 11px/1 var(--mono); letter-spacing: .1em; padding: 2px 4px 12px; }
.led { width: 9px; height: 9px; border-radius: 50%; background: #3a3a36; display: inline-block; transition: background .2s, box-shadow .2s; }
.led.on { background: var(--phos); box-shadow: 0 0 10px var(--phos); }
.scope-body { display: grid; grid-template-columns: 1fr 128px; gap: 12px; }
#scope { width: 100%; aspect-ratio: 10 / 7; display: block; border-radius: 4px; background: var(--scope); cursor: crosshair; box-shadow: inset 0 0 40px rgba(0,0,0,.9); touch-action: pan-y; }
.scope-read { display: flex; flex-direction: column; gap: 6px; }
.scope-read > div:not(.knobs) { background: #081627; border: 1px solid #1F3653; padding: 8px 10px; border-radius: 3px; }
.scope-read span { display: block; font: 500 9px/1 var(--mono); letter-spacing: .1em; color: #7F93AB; }
.scope-read b { font: 600 20px/1.3 var(--mono); color: var(--phos); font-variant-numeric: tabular-nums; }
.scope-read .o b { color: var(--teal-hi); }
.scope-read em { font: 400 10px/1 var(--mono); font-style: normal; margin-left: 4px; color: #7F93AB; }
.knobs { display: flex; justify-content: space-between; padding: 10px 4px 0; margin-top: auto; }
.knobs i { width: 30px; height: 30px; border-radius: 50%; background: conic-gradient(from 0deg, #4a4b46, #262723, #4a4b46, #262723, #4a4b46); border: 1px solid #000; position: relative; transition: transform .6s; }
.knobs i::after { content: ""; position: absolute; left: 50%; top: 3px; width: 2px; height: 8px; background: #ddd; transform: translateX(-50%); }
.scope figcaption { font: 400 11px/1.4 var(--mono); color: #807d74; padding: 12px 4px 2px; }
.scope figcaption { color: #7F93AB; }

/* ---------- ticker ---------- */
.ticker { background: var(--night); color: var(--on-night); overflow: hidden; border-block: 1.5px solid var(--night); }
.ticker-track { display: flex; width: max-content; animation: tick 48s linear infinite; }
.ticker span { font: 500 13px/1 var(--mono); letter-spacing: .08em; padding: 16px 28px; white-space: nowrap; border-right: 1px solid #1E3A5F; }
.ticker span::first-letter { color: var(--signal); }
@keyframes tick { to { transform: translateX(-50%); } }

/* ---------- section scaffolding ---------- */
.section { padding: 120px 0; }
.rule { display: flex; align-items: center; gap: 16px; font: 500 12px/1 var(--mono); letter-spacing: .08em; margin-bottom: 28px; }
.rule i { flex: 1; height: 1.5px; background: var(--ink); }
.rule span:first-child { color: var(--signal); }
.h2 { font-size: clamp(44px, 7vw, 104px); line-height: .9; font-weight: 850; font-stretch: 118%; letter-spacing: -.035em; margin-bottom: 20px; }
.sub { max-width: 52ch; color: var(--ink-2); font-size: 18px; }

/* ---------- pinout ---------- */
.pinout { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: 56px; margin-top: 56px; align-items: center; }
.chip { display: grid; grid-template-columns: 1fr minmax(150px, 220px) 1fr; align-items: stretch; }
.pins { display: flex; flex-direction: column; justify-content: space-around; padding: 18px 0; gap: 10px; }
.pin { display: flex; align-items: center; background: none; border: 0; padding: 0; gap: 10px; height: 34px; }
.pins-l .pin { justify-content: flex-end; }
.pins-r .pin { flex-direction: row-reverse; justify-content: flex-end; }
.pin-code { font: 600 14px/1 var(--mono); letter-spacing: .06em; transition: color .2s; }
.pin-n { font: 400 10px/1 var(--mono); color: var(--muted); }
.pin-leg { width: 54px; height: 14px; background: linear-gradient(#cfccc4, #9c998f 60%, #b9b6ad); border: 1px solid var(--ink); transition: background .2s, width .25s; }
.pins-l .pin-leg { border-right: 0; }
.pins-r .pin-leg { border-left: 0; }
.pin:hover .pin-code, .pin.is-on .pin-code { color: var(--signal); }
.pin.is-on .pin-leg { background: var(--signal); width: 72px; box-shadow: 0 0 18px color-mix(in srgb, var(--signal) 60%, transparent); }
.pin:focus-visible { outline: 2px dashed var(--signal); outline-offset: 4px; }

.chip-body { background: var(--grad); border-radius: 6px; position: relative; display: grid; place-items: center; min-height: 420px; box-shadow: inset 0 0 0 1px #000, inset 0 2px 0 rgba(255,255,255,.18), 10px 10px 0 rgba(11,35,66,.15); }
.notch { position: absolute; top: -1px; left: 50%; width: 34px; height: 17px; transform: translateX(-50%); background: var(--paper); border-radius: 0 0 34px 34px; box-shadow: inset 0 -1px 0 #000; }
.dot1 { position: absolute; top: 22px; left: 18px; width: 12px; height: 12px; border-radius: 50%; background: #071a30; box-shadow: inset 0 1px 2px #000; }
.chip-text { text-align: center; color: #A9C6DA; font: 500 10px/1.6 var(--mono); letter-spacing: .14em; writing-mode: vertical-rl; transform: rotate(180deg); }
.chip-text strong { display: block; font: 900 64px/1 var(--disp); font-stretch: 125%; color: #fff; letter-spacing: .02em; margin: 10px 0; transition: color .2s; }

.pin-panel { border: 1.5px solid var(--ink); background: var(--paper); padding: 28px; position: relative; box-shadow: 10px 10px 0 var(--shadow); }
.pp-head { display: flex; justify-content: space-between; font: 600 12px/1 var(--mono); letter-spacing: .08em; padding-bottom: 14px; border-bottom: 1px solid var(--line); }
.pp-head span:last-child { background: var(--signal); color: var(--paper); padding: 4px 8px; margin: -4px 0; }
.pin-panel h3 { font-size: 36px; line-height: 1; font-weight: 800; font-stretch: 112%; letter-spacing: -.02em; margin: 22px 0 12px; }
.pin-panel p { color: var(--ink-2); margin-bottom: 22px; min-height: 4.5em; }
.pp-spec { width: 100%; border-collapse: collapse; font: 400 13px/1.3 var(--mono); }
.pp-spec td { padding: 9px 0; border-top: 1px solid var(--line); }
.pp-spec td:last-child { text-align: right; font-weight: 600; }
.pin-panel.flash { animation: flash .35s; }
@keyframes flash { 0% { transform: translate(3px, 3px); box-shadow: 6px 6px 0 var(--signal); } }

/* ---------- catalog ---------- */
.catalog { background: var(--paper-2); border-block: 1.5px solid var(--ink); }
.cat-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; flex-wrap: wrap; margin-bottom: 48px; }
.filters { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 24px; }
.chip-btn { background: transparent; border: 1.5px solid var(--ink); padding: 9px 13px; font: 600 11px/1 var(--mono); letter-spacing: .08em; transition: background .15s, color .15s; }
.chip-btn:hover { background: var(--paper); }
.chip-btn.is-on { background: var(--ink); color: var(--paper); }

.cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1.5px solid var(--ink); border-left: 1.5px solid var(--ink); }
.card { border-right: 1.5px solid var(--ink); border-bottom: 1.5px solid var(--ink); background: var(--paper); padding: 22px 24px 20px; display: flex; flex-direction: column; position: relative; transition: background .25s; }
.card.is-hidden { display: none; }
.card::after { content: ""; position: absolute; inset: 0; border: 3px solid var(--signal); opacity: 0; pointer-events: none; transition: opacity .2s; }
.card:hover::after { opacity: 1; }
.card header { display: flex; justify-content: space-between; font: 600 12px/1 var(--mono); letter-spacing: .06em; }
.card header span:last-child { color: var(--muted); font-weight: 500; }
.sym { width: 100%; height: 120px; margin: 18px 0 14px; fill: none; stroke: var(--ink); stroke-width: 2; stroke-linecap: square; background:
  radial-gradient(circle, var(--line) 1px, transparent 1.2px) 0 0 / 12px 12px; border: 1px dashed var(--line); padding: 14px; transition: stroke .2s; overflow: visible; }
.sym .fill { fill: var(--ink); stroke: none; }
.card:hover .sym { stroke: var(--signal); }
.card:hover .sym .fill { fill: var(--signal); }
.card:hover .sym path, .card:hover .sym rect, .card:hover .sym circle { stroke-dasharray: 400; animation: draw 1s ease-out; }
@keyframes draw { from { stroke-dashoffset: 400; } }
.card h3 { font-size: 24px; line-height: 1.05; font-weight: 750; font-stretch: 108%; letter-spacing: -.01em; margin-bottom: 8px; }
.card p { font-size: 15px; color: var(--ink-2); margin-bottom: 18px; }
.card dl { display: grid; grid-template-columns: auto 1fr; font: 400 12.5px/1.2 var(--mono); margin-top: auto; }
.card dt, .card dd { padding: 8px 0; border-top: 1px solid var(--line); }
.card dt { color: var(--muted); }
.card dd { text-align: right; font-weight: 600; }
.card footer { display: flex; justify-content: space-between; align-items: center; margin-top: 18px; padding-top: 14px; border-top: 1.5px solid var(--ink); font: 600 11px/1 var(--mono); letter-spacing: .06em; }
.card footer a { text-decoration: none; }
.card footer a:hover { color: var(--signal); }
.st { display: inline-flex; align-items: center; gap: 8px; }
.st::before { content: ""; width: 8px; height: 8px; border-radius: 50%; }
.st-ok::before { background: #2DBE4A; box-shadow: 0 0 6px #2DBE4A; }
.st-amb::before { background: var(--amber); box-shadow: 0 0 6px var(--amber); }
.st-dev::before { background: var(--signal); animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: .15; } }

/* ---------- manifesto ---------- */
.manifesto { background: var(--night); color: var(--on-night); padding: 140px 0; }
.rule-dark i { background: #24406A; }
.rule-dark { color: #8DA2BB; }
.manifesto .w.hot { color: var(--teal-hi); }
.mani-text { font-size: clamp(30px, 4.6vw, 68px); line-height: 1.06; font-weight: 700; font-stretch: 105%; letter-spacing: -.025em; max-width: 22ch; margin-top: 48px; }
.mani-text .w { opacity: .14; transition: opacity .25s, color .25s; }
.mani-text .w.lit { opacity: 1; }
.mani-text .w.hot { color: var(--signal); }

/* ---------- signal path ---------- */
.path { margin-top: 72px; position: relative; }
.trace { position: relative; height: 4px; background: var(--line); margin: 0 calc(100% / 12); }
.trace-fill { position: absolute; inset: 0; transform-origin: left; transform: scaleX(var(--p, 0)); background: var(--signal); box-shadow: 0 0 14px var(--signal); }
.trace-pulse { position: absolute; top: -3px; width: 60px; height: 10px; left: 0; background: radial-gradient(closest-side, #fff, transparent); animation: pulse 2.2s linear infinite; opacity: calc(var(--p, 0) * 3); }
@keyframes pulse { from { left: 0; } to { left: calc(100% - 60px); } }
.stages { list-style: none; display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 0; margin-top: -14px; }
.stages li { padding: 0 14px; text-align: left; position: relative; }
.stages li::before { content: ""; display: block; width: 24px; height: 24px; margin: 0 auto 28px; background: var(--paper); border: 2px solid var(--ink); border-radius: 50%; transition: background .3s, border-color .3s, box-shadow .3s; }
.stages li.lit::before { background: var(--signal); border-color: var(--signal); box-shadow: 0 0 0 6px color-mix(in srgb, var(--signal) 20%, transparent); }
.stages i { display: block; font: 600 11px/1 var(--mono); font-style: normal; color: var(--muted); letter-spacing: .1em; margin-bottom: 8px; }
.stages b { display: block; font-size: 26px; font-weight: 800; font-stretch: 112%; letter-spacing: -.02em; line-height: 1; margin-bottom: 10px; transition: color .3s; }
.stages li.lit b { color: var(--signal); }
.stages p { font-size: 14.5px; color: var(--ink-2); margin-bottom: 12px; }
.stages span { font: 500 11px/1 var(--mono); padding: 4px 7px; border: 1px solid var(--ink); }

/* ---------- 7-segment stats ---------- */
.stats { background: #071A30; padding: 80px 0; border-block: 1.5px solid var(--night); }
.stat-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 2px; background: #16304F; border: 2px solid #16304F; }
.stat { background: #071A30; padding: 36px 28px 30px; }
.stat p { font: 500 12px/1.5 var(--mono); color: #8DA2BB; letter-spacing: .08em; text-transform: uppercase; margin-top: 18px; }
.seg { display: flex; font-size: clamp(48px, 5.6vw, 84px); height: 1em; --off: rgba(92, 225, 255, .07); }
.dg { position: relative; width: .56em; height: 1em; margin-right: .1em; transform: skewX(-7deg); }
.dg i { position: absolute; background: var(--off); border-radius: .03em; transition: background .1s; }
.dg .a, .dg .d, .dg .g { left: .08em; right: .08em; height: .085em; }
.dg .a { top: 0; } .dg .g { top: calc(50% - .0425em); } .dg .d { bottom: 0; }
.dg .b, .dg .c, .dg .e, .dg .f { width: .085em; height: calc(50% - .085em); }
.dg .f { left: 0; top: .065em; } .dg .b { right: 0; top: .065em; }
.dg .e { left: 0; bottom: .065em; } .dg .c { right: 0; bottom: .065em; }
.dg .p { width: .09em; height: .09em; right: -.1em; bottom: 0; border-radius: 50%; }
.dg i.on { background: var(--phos); box-shadow: 0 0 .12em color-mix(in srgb, var(--phos) 70%, transparent); }

/* ---------- contact ---------- */
.contact-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: 64px; align-items: start; }
.addr { display: grid; grid-template-columns: 90px 1fr; margin-top: 40px; border-top: 1.5px solid var(--ink); }
.addr dt, .addr dd { padding: 14px 0; border-bottom: 1px solid var(--line); }
.addr dt { font: 500 11px/1.9 var(--mono); color: var(--muted); letter-spacing: .08em; }
.addr a { text-decoration-color: var(--signal); text-underline-offset: 3px; }

.serial { background: #071A30; color: #D6E4EF; border-radius: 6px; overflow: hidden; box-shadow: 14px 14px 0 var(--signal); font-family: var(--mono); }
.serial-top { display: flex; justify-content: space-between; gap: 12px; padding: 12px 16px; background: #0E2440; font-size: 11px; letter-spacing: .08em; color: #8DA2BB; }
.serial-top .led { margin-right: 8px; vertical-align: -1px; }
.serial-log { padding: 18px 18px 6px; font-size: 13px; line-height: 1.7; min-height: 150px; max-height: 240px; overflow-y: auto; }
.serial-log em { font-style: normal; color: #4F6684; margin-right: 6px; }
.serial-log .tx { color: var(--teal-hi); }
.serial-log .rx { color: var(--phos); }
.serial-form { padding: 6px 18px 18px; display: grid; gap: 2px; }
.serial-form label { display: flex; gap: 12px; align-items: baseline; border-bottom: 1px dashed #22406A; padding: 10px 0; }
.serial-form label span { color: var(--phos); font-size: 13px; flex: 0 0 52px; }
.serial-form input, .serial-form textarea { flex: 1; min-width: 0; background: transparent; border: 0; color: #EAF4FA; font: 400 15px/1.5 var(--mono); outline: none; resize: vertical; caret-color: var(--signal); }
.serial-form ::placeholder { color: #4F6684; }
.serial-form label:focus-within { border-bottom-color: var(--signal); }
.serial-form button { justify-self: start; margin-top: 18px; background: var(--signal); color: #fff; border: 0; padding: 14px 22px; font: 600 13px/1 var(--mono); letter-spacing: .1em; transition: transform .15s, box-shadow .15s; }
.serial-form button:hover { transform: translate(-2px, -2px); box-shadow: 2px 2px 0 var(--phos); }

/* ---------- footer ---------- */
.foot { background: var(--night); color: var(--on-night); padding: 72px 0 28px; overflow: hidden; }
/* logo-style A: no crossbar, teal triangle at the base */
.ga { display: inline-block; width: .98em; height: .69em; vertical-align: baseline; }
.ga svg { display: block; width: 100%; height: 100%; overflow: visible; }
.ga-l { fill: currentColor; }
.ga-t { fill: var(--signal); transition: fill .2s; }
.wordmark span:hover .ga-t { fill: var(--ink); }
.foot-mark .ga-l { fill: none; stroke: #24406A; stroke-width: 1.5px; vector-effect: non-scaling-stroke; transition: stroke .4s; }
.foot:hover .foot-mark .ga-l { stroke: var(--signal); }
.foot-top { display: flex; justify-content: flex-start; margin-bottom: 36px; }
.foot-logo { width: 96px; height: auto; background: #EEF2F4; padding: 12px 14px; border-radius: 6px; }
.foot-mark { font-weight: 900; font-stretch: 125%; font-size: 15vw; line-height: .8; display: inline-block; letter-spacing: -.04em; color: transparent; -webkit-text-stroke: 1.5px #24406A; white-space: nowrap; transition: -webkit-text-stroke-color .4s; }
.foot:hover .foot-mark { -webkit-text-stroke-color: var(--signal); }
.foot-row { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 18px; margin-top: 40px; font: 500 12px/1 var(--mono); letter-spacing: .06em; color: #8DA2BB; }
.foot-row a { text-decoration: none; color: var(--on-night); }
.foot-row a:hover { color: var(--signal); }
.barcode { width: 180px; height: 34px; fill: #8DA2BB; }

/* ---------- reveal ---------- */
.rv { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.8,.2,1); }
.rv.in { opacity: 1; transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  .docmeta { display: none; }
  .docbar { grid-template-columns: auto 1fr; }
  .docnav { justify-content: flex-end; }
  .hero-grid, .pinout, .contact-grid { grid-template-columns: minmax(0, 1fr); gap: 48px; }
  .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stages { grid-template-columns: repeat(3, minmax(0, 1fr)); row-gap: 40px; }
  .trace { display: none; }
  .stages { margin-top: 0; }
  .stat-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 720px) {
  :root { --gutter: 16px; }
  body { font-size: 16px; }
  .docbar { grid-template-columns: 1fr auto; padding-block: 10px; }
  .menu-btn { display: flex; }
  .docnav { position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; gap: 0; background: var(--paper); border-bottom: 1.5px solid var(--ink); box-shadow: 0 18px 30px rgba(11,35,66,.12); display: none; }
  .docnav.open { display: flex; }
  .docnav a { padding: 18px var(--gutter); font-size: 14px; border: 0; border-top: 1px solid var(--line); }
  .logo-mark { height: 30px; }
  .logo { font-size: 15px; }
  .hero { padding-top: 32px; }
  .dimline { margin-bottom: 28px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { justify-content: center; }
  .rocker { align-self: flex-start; }
  .h2 { font-size: clamp(38px, 11vw, 56px); }
  .sub { font-size: 16px; }
  .pinout { margin-top: 36px; }
  .pin-panel { padding: 22px; }
  .pin-panel h3 { font-size: 28px; }
  .cat-head { margin-bottom: 28px; }
  .filters { margin-bottom: 0; }
  .stages { grid-template-columns: 1fr; row-gap: 0; border-left: 2px solid var(--line); margin-left: 11px; }
  .stages li { padding: 0 0 36px 28px; }
  .stages li:last-child { padding-bottom: 0; }
  .stages li::before { position: absolute; left: -13px; top: 0; margin: 0; }
  .stages li.lit { border-left: 2px solid var(--signal); margin-left: -2px; }
  .path { margin-top: 40px; }
  .mani-text { margin-top: 32px; }
  .stats { padding: 56px 0; }
  .serial-top { flex-direction: column; gap: 6px; }
  .contact-grid { gap: 40px; }
  .foot { padding-top: 48px; }
  .foot-top { margin-bottom: 24px; }
  .foot-logo { width: 72px; }
  .foot-row { flex-direction: column; align-items: flex-start; gap: 14px; margin-top: 28px; }
  .section { padding: 80px 0; }
  .scope-body { grid-template-columns: 1fr; }
  .scope-read { display: grid; grid-template-columns: repeat(2, 1fr); }
  .knobs { display: none !important; }
  .scope, .pin-panel { box-shadow: 6px 6px 0 var(--shadow); }
  .serial { box-shadow: 6px 6px 0 var(--signal); }
  .chip { grid-template-columns: 1fr 96px 1fr; }
  .chip-body { min-height: 360px; }
  .chip-text strong { font-size: 40px; }
  .pin-leg { width: 22px; }
  .pin.is-on .pin-leg { width: 30px; }
  .pin-code { font-size: 12px; }
  .pin-n { display: none; }
  .cards { grid-template-columns: minmax(0, 1fr); }
  .stat { padding: 26px 16px; }
  .seg { font-size: 44px; }
  .manifesto { padding: 96px 0; }
  .hero-facts li { grid-template-columns: 80px 1fr; }
}

@media (pointer: coarse) { .probe { display: none; } }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
  html { scroll-behavior: auto; }
  .rv { opacity: 1; transform: none; }
}