/* ==========================================================================
   Telvonic Systems — design system v4 ("instrument-grade editorial")
   Warm paper, ink type, one signal colour, mono technical labels, hairline grids.
   ========================================================================== */

/* Fallback faces matched to Geist's metrics (measured on the site's own headings and body text: width per weight against Arial, ascent 1.01 em, descent 0.30 em;
   Geist Mono has the same 0.6 em advance as Courier New). Text keeps its line breaks when the web font swaps in, so
   nothing below it moves (Core Web Vitals: layout shift). */
@font-face { font-family: "Geist Fallback"; font-weight: 100 420; src: local("Arial"), local("ArialMT"), local("Helvetica Neue"), local("Helvetica"); size-adjust: 102.5%; ascent-override: 98.5%; descent-override: 29.3%; line-gap-override: 0%; }
@font-face { font-family: "Geist Fallback"; font-weight: 421 474; src: local("Arial"), local("ArialMT"), local("Helvetica Neue"), local("Helvetica"); size-adjust: 103.7%; ascent-override: 97.4%; descent-override: 28.9%; line-gap-override: 0%; }
@font-face { font-family: "Geist Fallback"; font-weight: 475 549; src: local("Arial"), local("ArialMT"), local("Helvetica Neue"), local("Helvetica"); size-adjust: 104.9%; ascent-override: 96.3%; descent-override: 28.6%; line-gap-override: 0%; }
@font-face { font-family: "Geist Fallback"; font-weight: 550 649; src: local("Arial Bold"), local("Arial-BoldMT"), local("Helvetica Neue Bold"), local("Helvetica-Bold"); size-adjust: 99.8%; ascent-override: 101.2%; descent-override: 30.1%; line-gap-override: 0%; }
@font-face { font-family: "Geist Fallback"; font-weight: 650 900; src: local("Arial Bold"), local("Arial-BoldMT"), local("Helvetica Neue Bold"), local("Helvetica-Bold"); size-adjust: 102.0%; ascent-override: 99.0%; descent-override: 29.4%; line-gap-override: 0%; }
@font-face { font-family: "Geist Mono Fallback"; font-weight: 100 900; src: local("Courier New"), local("CourierNewPSMT"); size-adjust: 100.0%; ascent-override: 101.0%; descent-override: 30.0%; line-gap-override: 0%; }

:root {
  --paper: #f3f1ec;
  --paper-2: #eae6de;
  --paper-3: #dfd9ce;
  --card: #fbfaf7;
  --ink: #111315;
  --ink-2: #2b2f34;
  --muted: #5f636a;
  --tone: #7d8187;
  --line: rgba(17, 19, 21, 0.12);
  --line-2: rgba(17, 19, 21, 0.22);
  --signal: #ff5b1f;
  --signal-ink: #b23c0c;
  --signal-soft: #ffe3d6;
  --ok: #0e9f6e;
  --night: #0e1012;
  --night-2: #171a1d;
  --night-line: rgba(255, 255, 255, 0.1);
  --night-muted: #a3a8ae;

  --sans: "Geist", "Geist Fallback", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "Geist Mono", "Geist Mono Fallback", ui-monospace, "SFMono-Regular", Consolas, monospace;

  --r-sm: 0.625rem;
  --r: 1.125rem;
  --r-lg: 1.75rem;
  --container: 80rem;
  --gutter: clamp(1rem, 4vw, 2.5rem);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --shadow: 0 1px 0 rgba(17, 19, 21, 0.04), 0 1.125rem 3.125rem -1.5rem rgba(17, 19, 21, 0.28);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 400 1rem/1.6 var(--sans); letter-spacing: -0.006em;
  -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden; text-rendering: optimizeLegibility;
}
img, svg, video, canvas { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
p { margin: 0 0 1em; color: var(--muted); }
ul, ol { margin: 0; padding: 0; list-style: none; }
button { font: inherit; color: inherit; }
h1, h2, h3, h4 { margin: 0 0 0.45em; font-weight: 500; letter-spacing: -0.035em; line-height: 1.04; color: var(--ink); }
h1, .display { font-size: clamp(2.6rem, 5.8vw, 5.2rem); letter-spacing: -0.045em; line-height: 0.98; }
h2 { font-size: clamp(2rem, 4vw, 3.4rem); }
h3 { font-size: clamp(1.2rem, 1.6vw, 1.45rem); letter-spacing: -0.02em; line-height: 1.2; }
.tone { color: var(--tone); }
.signal { color: var(--signal-ink); }
:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; border-radius: 0.375rem; }
::selection { background: var(--signal); color: var(--ink); }

.skip-link { position: absolute; left: -624.9375rem; top: 0; z-index: 1000; background: var(--ink); color: var(--paper); padding: 0.625rem 1rem; border-radius: 0 0 0.625rem 0; }
.skip-link:focus { left: 0; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 var(--gutter); }
.section { padding: clamp(5rem, 10vw, 8.75rem) 0; position: relative; }
.section.tight { padding: clamp(3.5rem, 7vw, 6rem) 0; }
.section.alt { background: var(--paper-2); }
.rule { border-top: 1px solid var(--line); }

/* ---------- Labels ---------- */
.mono { font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted); }
.tag { display: inline-flex; align-items: center; gap: 0.625rem; font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-2); margin-bottom: 1.375rem; }
.tag::before { content: ""; width: 0.4375rem; height: 0.4375rem; background: var(--signal); flex: none; }
.night .tag { color: var(--night-muted); }
.lead { font-size: clamp(1.05rem, 1.3vw, 1.2rem); line-height: 1.55; color: var(--ink-2); }

/* ---------- Buttons ---------- */
.btn {
  --h: 3.125rem;
  display: inline-flex; align-items: center; justify-content: center; gap: 0.625rem; height: var(--h); padding: 0 1.5rem;
  border-radius: 62.4375rem; border: 1px solid transparent; font-weight: 500; font-size: 0.9375rem; letter-spacing: -0.01em; white-space: nowrap;
  cursor: pointer; transition: background 0.25s, color 0.25s, border-color 0.25s, transform 0.25s var(--ease);
}
.btn svg { width: 1rem; height: 1rem; transition: transform 0.3s var(--ease); }
.btn:hover svg { transform: translateX(3px); }
.btn:active { transform: scale(0.98); }
.btn-ink { background: var(--ink); color: var(--paper); }
.btn-ink:hover { background: #000; }
.btn-line { border-color: var(--line-2); color: var(--ink); background: transparent; }
.btn-line:hover { border-color: var(--ink); background: rgba(17, 19, 21, 0.03); }
.btn-signal { background: var(--signal); color: var(--ink); }
.btn-signal:hover { background: #ff7a45; }
.btn-paper { background: var(--paper); color: var(--ink); }
.btn-paper:hover { background: #fff; }
.btn-ghost-night { border-color: rgba(255, 255, 255, 0.22); color: var(--paper); }
.btn-ghost-night:hover { border-color: var(--paper); }
.btn-sm { --h: 2.5rem; padding: 0 1.125rem; font-size: 0.875rem; }
.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.link-arrow { display: inline-flex; align-items: center; gap: 0.5rem; font-weight: 500; color: var(--ink); border-bottom: 1px solid var(--line-2); padding-bottom: 2px; transition: border-color 0.2s, gap 0.3s var(--ease); }
.link-arrow:hover { border-color: var(--ink); gap: 0.75rem; }
.link-arrow svg { width: 0.875rem; height: 0.875rem; }
.night .link-arrow { color: var(--paper); border-color: rgba(255, 255, 255, 0.3); }
.night .link-arrow:hover { border-color: var(--paper); }

/* ---------- Header ---------- */
.site-header { position: fixed; inset: 0 0 auto; z-index: 100; padding: 0.875rem 0; transition: background 0.3s, box-shadow 0.3s; }
.site-header.scrolled { background: rgba(243, 241, 236, 0.82); backdrop-filter: saturate(1.4) blur(14px); -webkit-backdrop-filter: saturate(1.4) blur(14px); box-shadow: 0 1px 0 var(--line); }
.nav { display: flex; align-items: center; justify-content: space-between; gap: 1.25rem; height: 3rem; }
.logo { display: inline-flex; align-items: center; gap: 0.625rem; font-weight: 600; font-size: 1.125rem; letter-spacing: -0.03em; }
.logo img { width: 1.875rem; height: 1.875rem; }
.logo span small { font-family: var(--mono); font-weight: 400; font-size: 0.625rem; letter-spacing: 0.12em; color: var(--muted); margin-left: 0.375rem; }
.nav-pill { display: flex; align-items: center; gap: 2px; padding: 0.25rem; border-radius: 62.4375rem; background: rgba(234, 230, 222, 0.78); border: 1px solid var(--line); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); }
.nav-pill > li { position: relative; }
.nav-pill > li > a, .nav-pill button.nav-drop {
  display: inline-flex; align-items: center; gap: 0.375rem; height: 2.375rem; padding: 0 1rem; border-radius: 62.4375rem; border: 0; background: none;
  font-size: 0.875rem; font-weight: 450; color: var(--ink-2); cursor: pointer; transition: background 0.2s, color 0.2s;
}
.nav-pill > li > a:hover, .nav-pill button.nav-drop:hover, .nav-pill button.nav-drop[aria-expanded="true"] { background: rgba(17, 19, 21, 0.06); color: var(--ink); }
.nav-pill > li > a[aria-current="page"], .nav-pill button.nav-drop.current { background: var(--card); color: var(--ink); box-shadow: 0 1px 2px rgba(17, 19, 21, 0.08); }
.nav-drop svg { width: 0.75rem; height: 0.75rem; transition: transform 0.3s var(--ease); }
.nav-drop[aria-expanded="true"] svg { transform: rotate(180deg); }
.nav-right { display: flex; align-items: center; gap: 0.5rem; }
.nav-right .text-link { font-size: 0.875rem; color: var(--ink-2); padding: 0 0.75rem; }
.nav-right .text-link:hover { color: var(--ink); }

/* Mega menu */
.mega {
  position: absolute; top: calc(100% + 0.75rem); left: calc(50% + var(--mega-shift, 0px)); width: min(80rem, calc(100vw - 2rem)); transform: translate(-50%, 0.5rem);
  display: grid; grid-template-columns: repeat(5, 1fr) 0.85fr; gap: 0.625rem; padding: 0.625rem;
  background: var(--card); border: 1px solid var(--line); border-radius: 1.375rem; box-shadow: 0 30px 80px -30px rgba(17, 19, 21, 0.35);
  opacity: 0; visibility: hidden; transition: opacity 0.25s, transform 0.3s var(--ease), visibility 0.25s;
}
.mega.open { opacity: 1; visibility: visible; transform: translate(-50%, 0); }
.mega::before { content: ""; position: absolute; left: 0; right: 0; top: -0.875rem; height: 0.875rem; }
.mega-card { display: flex; flex-direction: column; gap: 0.625rem; padding: 0.5rem; border-radius: 0.875rem; transition: background 0.2s; }
.mega-card:hover { background: var(--paper); }
.mega-card .thumb { aspect-ratio: 16 / 10; border-radius: 0.625rem; overflow: hidden; background: var(--paper-2); }
.mega-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s var(--ease); }
.mega-card:hover .thumb img { transform: scale(1.05); }
.mega-card b { font-weight: 500; font-size: 0.9375rem; letter-spacing: -0.015em; }
.mega-card span { font-size: 0.8125rem; color: var(--muted); line-height: 1.4; }
.mega-list { padding: 0.875rem 0.75rem; border-left: 1px solid var(--line); display: flex; flex-direction: column; gap: 2px; }
.mega-list .mono { margin: 0 0 0.5rem 0.5rem; }
.mega-list a { padding: 0.5625rem 0.5rem; border-radius: 0.5rem; font-size: 0.875rem; color: var(--ink-2); display: flex; justify-content: space-between; }
.mega-list a:hover { background: var(--paper); color: var(--ink); }

.nav-toggle { display: none; width: 2.75rem; height: 2.75rem; border-radius: 62.4375rem; border: 1px solid var(--line-2); background: var(--card); cursor: pointer; align-items: center; justify-content: center; }
.nav-toggle span, .nav-toggle span::before { display: block; width: 1rem; height: 1.5px; background: var(--ink); position: relative; transition: transform 0.3s var(--ease); }
.nav-toggle span::before { content: ""; position: absolute; top: 0.3125rem; }
.nav-toggle span { transform: translateY(-2.5px); }
.menu-open .nav-toggle span { transform: rotate(45deg); }
.menu-open .nav-toggle span::before { transform: translateY(-0.3125rem) rotate(-90deg); }
.mobile-menu {
  position: fixed; inset: 4.75rem 0 0; z-index: 99; background: var(--paper); padding: 1rem var(--gutter) 2.5rem; overflow-y: auto;
  opacity: 0; visibility: hidden; transform: translateY(-0.5rem); transition: opacity 0.3s, transform 0.35s var(--ease), visibility 0.3s;
}
.menu-open .mobile-menu { opacity: 1; visibility: visible; transform: none; }
.mobile-menu a.big { display: flex; justify-content: space-between; align-items: center; padding: 1rem 0; border-bottom: 1px solid var(--line); font-size: 1.625rem; letter-spacing: -0.03em; }
.mobile-menu .sub { display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; padding: 0.875rem 0 1.125rem; border-bottom: 1px solid var(--line); }
.mobile-menu .sub a { padding: 0.75rem; border-radius: 0.75rem; background: var(--card); border: 1px solid var(--line); font-size: 0.875rem; }
.mobile-menu .actions { margin-top: 1.5rem; }
.mobile-menu .actions .btn { flex: 1; }

/* ---------- Home hero ---------- */
.hero { padding: 8.25rem 0 0; }
.hero-top { display: grid; grid-template-columns: 1.35fr 1fr; gap: clamp(1.75rem, 5vw, 5rem); align-items: end; }
.hero-title { border-left: 1px solid var(--line-2); padding-left: clamp(1.125rem, 2.4vw, 2rem); }
.hero-title h1 { margin: 0; }
.hero-side .lead { margin-bottom: 1.625rem; max-width: 28.75rem; }

/* Stage: framed 3D line */
.stage {
  position: relative; margin-top: clamp(2rem, 4vw, 3.25rem); height: clamp(27.5rem, 66vh, 46.25rem); border-radius: var(--r-lg); overflow: hidden;
  border: 1px solid var(--line); isolation: isolate;
  background: radial-gradient(120% 90% at 55% 30%, #fbfaf7 0%, #f0ece5 48%, #e5e0d6 100%);
}
.stage-canvas { position: absolute; inset: 0; z-index: 1; }
.stage-canvas canvas { position: absolute; inset: 0; width: 100% !important; height: 100% !important; opacity: 0; transition: opacity 1.2s var(--ease); }
.stage.is-ready .stage-canvas canvas { opacity: 1; }
.stage-fallback { position: absolute; inset: 0; z-index: 0; width: 100%; height: 100%; object-fit: cover; transition: opacity 0.8s; }
.stage.is-ready .stage-fallback { opacity: 0; }
.hero3d-labels { position: absolute !important; inset: 0; z-index: 2; cursor: grab; }
.hero3d-labels:active { cursor: grabbing; }
.stage .mark { position: absolute; width: 0.875rem; height: 0.875rem; z-index: 3; pointer-events: none; border-color: var(--ink); border-style: solid; opacity: 0.45; }
.stage .mark.tl { top: 0.875rem; left: 0.875rem; border-width: 1px 0 0 1px; }
.stage .mark.tr { top: 0.875rem; right: 0.875rem; border-width: 1px 1px 0 0; }
.stage .mark.bl { bottom: 0.875rem; left: 0.875rem; border-width: 0 0 1px 1px; }
.stage .mark.br { bottom: 0.875rem; right: 0.875rem; border-width: 0 1px 1px 0; }
.stage-hud { position: absolute; top: 1.125rem; left: 1.125rem; right: 1.125rem; z-index: 4; display: flex; justify-content: space-between; align-items: flex-start; gap: 0.75rem; pointer-events: none; }
.stage-hud > * { pointer-events: auto; }
.live-chip { display: inline-flex; align-items: center; gap: 0.625rem; height: 2.25rem; padding: 0 0.875rem; border-radius: 62.4375rem; background: rgba(251, 250, 247, 0.86); border: 1px solid var(--line); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); font-family: var(--mono); font-size: 0.7188rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-2); }
.live-chip i { width: 0.5rem; height: 0.5rem; border-radius: 50%; background: var(--signal); box-shadow: 0 0 0 0 rgba(255, 91, 31, 0.5); animation: ping 1.8s infinite; }
@keyframes ping { 0% { box-shadow: 0 0 0 0 rgba(255, 91, 31, 0.55); } 80%, 100% { box-shadow: 0 0 0 9px rgba(255, 91, 31, 0); } }
.views { display: inline-flex; gap: 2px; padding: 3px; border-radius: 62.4375rem; background: rgba(251, 250, 247, 0.86); border: 1px solid var(--line); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); overflow-x: auto; scrollbar-width: none; max-width: 100%; }
.views::-webkit-scrollbar { display: none; }
.views button { height: 2rem; padding: 0 0.875rem; border: 0; border-radius: 62.4375rem; background: none; font-size: 0.8125rem; color: var(--ink-2); cursor: pointer; white-space: nowrap; transition: background 0.2s, color 0.2s; }
.views button:hover { background: rgba(17, 19, 21, 0.06); }
.views button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }
.stage-foot { position: absolute; left: 0; right: 0; bottom: 0; z-index: 4; display: grid; grid-template-columns: repeat(4, 1fr) auto; border-top: 1px solid var(--line); background: rgba(251, 250, 247, 0.84); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); }
.stage-foot > div { padding: 0.75rem 1.125rem; border-right: 1px solid var(--line); min-width: 0; }
.stage-foot .mono { font-size: 0.6562rem; display: block; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.stage-foot b { display: block; font-family: var(--mono); font-weight: 500; font-size: 0.9375rem; font-variant-numeric: tabular-nums; color: var(--ink); margin-top: 2px; }
.stage-foot b em { font-style: normal; color: var(--signal-ink); }
.stage-foot .ctrl { display: flex; align-items: center; gap: 0.5rem; border-right: 0; }
.icon-btn { width: 2.25rem; height: 2.25rem; border-radius: 62.4375rem; border: 1px solid var(--line-2); background: var(--card); display: grid; place-items: center; cursor: pointer; transition: border-color 0.2s; }
.icon-btn:hover { border-color: var(--ink); }
.icon-btn svg { width: 0.875rem; height: 0.875rem; }
.drag-hint { font-family: var(--mono); font-size: 0.6562rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); white-space: nowrap; }

/* 3D labels (CSS2D) */
.st-label { pointer-events: none; padding: 0.4375rem 0.625rem 0.4375rem 0.75rem; border-radius: 0.625rem; background: rgba(251, 250, 247, 0.94); border: 1px solid var(--line-2); box-shadow: 0 8px 24px -12px rgba(17, 19, 21, 0.35); font: 500 0.6875rem/1.35 var(--mono); letter-spacing: 0.04em; color: var(--ink); white-space: nowrap; text-transform: uppercase; }
.st-label span { display: block; color: var(--muted); font-size: 0.625rem; letter-spacing: 0.02em; }
.st-label b { font-weight: 500; display: inline-flex; align-items: center; gap: 0.4375rem; }
.st-label b::before { content: ""; width: 0.375rem; height: 0.375rem; background: var(--signal); }
.st-label.ok b::before { background: var(--ok); border-radius: 50%; }
.st-label em { font-style: normal; color: var(--ink); font-weight: 500; }

/* Proof bar (under hero) */
.proof { display: grid; grid-template-columns: repeat(4, 1fr); border-bottom: 1px solid var(--line); margin-top: clamp(1.75rem, 3vw, 2.5rem); }
.proof > div { display: flex; align-items: center; justify-content: space-between; gap: 0.875rem; padding: 1.125rem 1.25rem 1.125rem 0; border-right: 1px solid var(--line); }
.proof > div + div { padding-left: 1.25rem; }
.proof > div:last-child { border-right: 0; }
.proof b { display: block; font-weight: 500; font-size: 0.9375rem; letter-spacing: -0.015em; }
.proof span { font-size: 0.8125rem; color: var(--muted); }
.proof svg { width: 1.375rem; height: 1.375rem; flex: none; color: var(--ink-2); }

/* ---------- Section heads ---------- */
.head { display: grid; grid-template-columns: 1.2fr 1fr; gap: clamp(1.5rem, 5vw, 5rem); align-items: end; margin-bottom: clamp(2.25rem, 5vw, 4rem); }
.head h2 { margin: 0; }
.head p { margin: 0; max-width: 30rem; }
.head.stack { grid-template-columns: 1fr; max-width: 51.25rem; }
.head.center { grid-template-columns: 1fr; text-align: center; justify-items: center; }

/* ---------- Service cards (photo) ---------- */
.svc-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.875rem; }
.svc { position: relative; display: flex; flex-direction: column; justify-content: flex-end; aspect-ratio: 3 / 4; padding: 1.25rem; border-radius: var(--r); overflow: hidden; isolation: isolate; color: #fff; }
.svc img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -2; transition: transform 1.1s var(--ease); }
.svc::before { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(180deg, rgba(10, 11, 12, 0) 35%, rgba(10, 11, 12, 0.78) 100%); }
.svc:hover img { transform: scale(1.06); }
.svc .idx { position: absolute; top: 1rem; left: 1.125rem; font-family: var(--mono); font-size: 0.6875rem; letter-spacing: 0.08em; color: rgba(255, 255, 255, 0.85); }
.svc h3 { color: #fff; font-size: clamp(1.3rem, 1.8vw, 1.6rem); margin-bottom: 0.375rem; }
.svc p { color: rgba(255, 255, 255, 0.8); font-size: 0.875rem; margin: 0 0 1rem; }
.svc .pill { align-self: flex-start; display: inline-flex; align-items: center; gap: 0.5rem; height: 2.125rem; padding: 0 0.875rem; border-radius: 62.4375rem; background: #fff; color: var(--ink); font-size: 0.8125rem; font-weight: 500; }
.svc .pill svg { width: 0.8125rem; height: 0.8125rem; transition: transform 0.3s var(--ease); }
.svc:hover .pill svg { transform: translateX(3px); }

/* ---------- Spec tiles with registration marks ---------- */
.spec-tiles { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.875rem; }
.spec-tile { position: relative; padding: 1.125rem 1.25rem 1.25rem; min-height: 12.5rem; display: flex; flex-direction: column; justify-content: space-between; background: var(--card); border: 1px solid var(--line); }
.spec-tile::before, .spec-tile::after { content: ""; position: absolute; width: 0.5rem; height: 0.5rem; border: solid var(--ink); opacity: 0.6; }
.spec-tile::before { top: -1px; left: -1px; border-width: 1.5px 0 0 1.5px; }
.spec-tile::after { bottom: -1px; right: -1px; border-width: 0 1.5px 1.5px 0; }
.spec-tile .mono { font-size: 0.6875rem; line-height: 1.5; }
.spec-tile .mono::before { content: "▸ "; color: var(--signal-ink); }
.num { display: flex; align-items: flex-end; gap: 0.625rem; font-size: clamp(2.6rem, 4.4vw, 4rem); font-weight: 400; letter-spacing: -0.05em; line-height: 0.9; font-variant-numeric: tabular-nums; }
.num i { font-style: normal; font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.04em; line-height: 1; padding: 0.3125rem 0.4375rem; border: 1px solid var(--ink); margin-bottom: 0.25rem; }
.night .spec-tile { background: var(--night-2); border-color: var(--night-line); }
.night .spec-tile::before, .night .spec-tile::after { border-color: var(--paper); }
.night .num i { border-color: var(--paper); }

/* ---------- Stations (tabs + spec + photo) ---------- */
.seg { display: inline-flex; gap: 2px; padding: 0.25rem; border-radius: 62.4375rem; background: var(--paper-2); border: 1px solid var(--line); margin-bottom: 1.25rem; flex-wrap: wrap; }
.seg button { height: 2.375rem; padding: 0 1.125rem; border: 0; border-radius: 62.4375rem; background: none; cursor: pointer; font-size: 0.875rem; color: var(--ink-2); transition: background 0.2s, color 0.2s; }
.seg button[aria-selected="true"] { background: var(--ink); color: var(--paper); }
.station { display: grid; grid-template-columns: 1fr 1.2fr; gap: 0.875rem; }
.station[hidden] { display: none; }
.station-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--r-lg); padding: clamp(1.375rem, 3vw, 2.25rem); display: flex; flex-direction: column; }
.station-card h3 { font-size: clamp(1.6rem, 2.4vw, 2.2rem); letter-spacing: -0.035em; margin-bottom: 0.625rem; }
.station-card .actions { margin-top: auto; padding-top: 1.5rem; }
.spec-table { border-top: 1px solid var(--line); margin-top: 1.125rem; }
.spec-table > div { display: grid; grid-template-columns: 9.375rem 1fr; gap: 1rem; padding: 0.6875rem 0; border-bottom: 1px solid var(--line); font-size: 0.875rem; }
.spec-table dt { font-family: var(--mono); font-size: 0.7188rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted); padding-top: 2px; }
.spec-table dd { margin: 0; color: var(--ink); }
.photo-frame { position: relative; margin: 0; border-radius: var(--r-lg); overflow: hidden; background: var(--paper-2); border: 1px solid var(--line); min-height: 26.25rem; }
.photo-frame img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.photo-frame figcaption { position: absolute; left: 0.875rem; bottom: 0.875rem; display: flex; flex-wrap: wrap; gap: 0.375rem; }
.chip { display: inline-flex; align-items: center; gap: 0.5rem; height: 1.875rem; padding: 0 0.75rem; border-radius: 62.4375rem; background: rgba(251, 250, 247, 0.92); border: 1px solid var(--line); font-family: var(--mono); font-size: 0.6875rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--ink); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); }
.chip i { width: 0.375rem; height: 0.375rem; border-radius: 50%; background: var(--ok); }

/* ---------- Process: sticky stacked cards ---------- */
.stack-wrap { display: grid; grid-template-columns: 1fr 1.25fr; gap: clamp(1.75rem, 5vw, 5rem); align-items: start; }
.stack-intro { position: sticky; top: 7.5rem; }
.stack-cards { display: grid; gap: 1rem; }
.stack-card { position: sticky; top: calc(6.875rem + var(--i) * 0.875rem); min-height: 17.5rem; padding: clamp(1.375rem, 3vw, 2.125rem); border-radius: 1.5rem; display: flex; flex-direction: column; justify-content: space-between; gap: 2.5rem; border: 1px solid var(--line); box-shadow: 0 -12px 30px -22px rgba(17, 19, 21, 0.35); }
.stack-card:nth-child(1) { background: var(--card); }
.stack-card:nth-child(2) { background: #ece7dd; }
.stack-card:nth-child(3) { background: #ddd6c8; }
.stack-card:nth-child(4) { background: var(--ink); border-color: var(--ink); }
.stack-card:nth-child(4) h3, .stack-card:nth-child(4) .step-n { color: var(--paper); border-color: rgba(255, 255, 255, 0.35); }
.stack-card:nth-child(4) p { color: var(--night-muted); }
.stack-card:nth-child(5) { background: var(--signal); border-color: var(--signal); }
.stack-card:nth-child(5) p { color: #3b1a0c; }
.step-n { width: 2.375rem; height: 2.375rem; border-radius: 50%; border: 1px solid var(--line-2); display: grid; place-items: center; font-family: var(--mono); font-size: 0.8125rem; }
.stack-card h3 { font-size: clamp(1.5rem, 2.4vw, 2.1rem); letter-spacing: -0.035em; margin-bottom: 0.5rem; }
.stack-card p { margin: 0; max-width: 32.5rem; }

/* ---------- Media cards (technologies) ---------- */
.media-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.media-card { display: flex; flex-direction: column; gap: 1rem; }
.media-card .img { aspect-ratio: 4 / 3; border-radius: var(--r); overflow: hidden; background: var(--paper-2); position: relative; }
.media-card .img img { width: 100%; height: 100%; object-fit: cover; transition: transform 1s var(--ease); }
.media-card:hover .img img { transform: scale(1.05); }
.media-card .img .chip { position: absolute; left: 0.75rem; top: 0.75rem; }
.media-card p { font-size: 1.0625rem; line-height: 1.45; color: var(--tone); margin: 0; }
.media-card p b { color: var(--ink); font-weight: 500; }
.media-card .link-arrow { align-self: flex-start; font-size: 0.875rem; }

/* ---------- Numbered rows ---------- */
.rows { border-top: 1px solid var(--line); }
.row { display: grid; grid-template-columns: 5.625rem 1fr 1.15fr; gap: 1.5rem; padding: 1.75rem 0; border-bottom: 1px solid var(--line); align-items: start; transition: background 0.3s; }
.row .n { font-family: var(--mono); font-size: 0.8125rem; color: var(--signal-ink); padding-top: 0.375rem; }
.row h3 { font-size: clamp(1.4rem, 2.2vw, 2rem); letter-spacing: -0.035em; margin: 0; }
.row p { margin: 0; }
.row .tags { display: flex; flex-wrap: wrap; gap: 0.375rem; margin-top: 0.875rem; }
.tiny { font-family: var(--mono); font-size: 0.6875rem; letter-spacing: 0.04em; text-transform: uppercase; padding: 0.25rem 0.5625rem; border-radius: 62.4375rem; border: 1px solid var(--line-2); color: var(--ink-2); }

/* ---------- List with media (Square-like) ---------- */
.list-media { border-top: 1px solid var(--line); }
.lm-row { display: grid; grid-template-columns: 17.5rem 1fr auto; gap: clamp(1.25rem, 3vw, 2.75rem); align-items: center; padding: 1.375rem 0; border-bottom: 1px solid var(--line); }
.lm-row .img { aspect-ratio: 16 / 10; border-radius: 0.875rem; overflow: hidden; background: var(--paper-2); }
.lm-row .img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.9s var(--ease); }
.lm-row:hover .img img { transform: scale(1.05); }
.lm-row h3 { font-size: clamp(1.4rem, 2.2vw, 1.9rem); letter-spacing: -0.035em; }
.lm-row p { margin: 0; max-width: 35rem; }

/* ---------- Bento (station specs) ---------- */
.bento { display: grid; grid-template-columns: repeat(4, 1fr); grid-auto-rows: minmax(11.875rem, auto); gap: 0.875rem; }
.bento > * { position: relative; border-radius: var(--r); background: var(--card); border: 1px solid var(--line); padding: 1.25rem; display: flex; flex-direction: column; justify-content: space-between; overflow: hidden; }
.bento .wide { grid-column: span 2; }
.bento .tall { grid-row: span 2; }
.bento .ink { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.bento .ink .mono { color: var(--night-muted); }
.bento .ink .num i { border-color: var(--paper); }
.bento .photo { padding: 0; }
.bento .photo img { width: 100%; height: 100%; object-fit: cover; }
.bento .photo .chip { position: absolute; left: 0.875rem; bottom: 0.875rem; }
.bento h4 { font-size: 0.9375rem; font-weight: 500; letter-spacing: -0.015em; margin: 0; }
.bento ul.checks { margin-top: 0.75rem; }

/* ---------- Checklists ---------- */
.checks li { position: relative; padding-left: 1.625rem; margin-bottom: 0.5625rem; font-size: 0.9375rem; color: var(--ink-2); }
.checks li::before { content: ""; position: absolute; left: 0; top: 0.3125rem; width: 0.875rem; height: 0.875rem; border-radius: 3px; background: var(--signal) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23111315' stroke-width='3.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E") center / 0.625rem no-repeat; }
.night .checks li { color: #d5d8dc; }

/* ---------- Night band ---------- */
.night { background: var(--night); color: var(--paper); }
.night h2, .night h3, .night h4 { color: var(--paper); }
.night p { color: var(--night-muted); }
.night .tone { color: #71767d; }
.dots { background-image: radial-gradient(rgba(255, 255, 255, 0.09) 1px, transparent 1px); background-size: 1.125rem 1.125rem; }
.split { display: grid; grid-template-columns: 1fr 1.15fr; gap: clamp(2rem, 6vw, 6rem); align-items: center; }
.split.flip > :first-child { order: 2; }

/* Dashboard mock (night) */
.dash { border-radius: 1.25rem; background: #15181b; border: 1px solid var(--night-line); overflow: hidden; box-shadow: 0 40px 80px -40px rgba(0, 0, 0, 0.8); }
.dash-top { display: flex; align-items: center; justify-content: space-between; padding: 0.75rem 1rem; border-bottom: 1px solid var(--night-line); font-family: var(--mono); font-size: 0.6875rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--night-muted); }
.dash-top span:first-child::before { content: ""; display: inline-block; width: 0.4375rem; height: 0.4375rem; border-radius: 50%; background: var(--ok); margin-right: 0.5rem; }
.dash-body { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--night-line); }
.dash-cell { background: #15181b; padding: 1.125rem; }
.dash-cell.wide { grid-column: span 2; }
.dash-cell .mono { color: var(--night-muted); font-size: 0.6562rem; }
.dash-cell .big { font-size: 2.5rem; letter-spacing: -0.04em; font-weight: 400; color: var(--paper); margin-top: 0.375rem; font-variant-numeric: tabular-nums; }
.dash-cell .big small { font-size: 0.875rem; color: var(--night-muted); margin-left: 0.25rem; }
.st-rows div { display: flex; justify-content: space-between; align-items: center; padding: 0.5rem 0; border-bottom: 1px dashed var(--night-line); font-family: var(--mono); font-size: 0.75rem; color: #d5d8dc; }
.st-rows div:last-child { border: 0; }
.st-pill { font-size: 0.625rem; letter-spacing: 0.06em; padding: 3px 0.5rem; border-radius: 62.4375rem; }
.st-pill.pass { background: rgba(14, 159, 110, 0.18); color: #3ddc97; }
.st-pill.run { background: rgba(255, 91, 31, 0.18); color: #ff9166; }
.st-pill.due { background: rgba(255, 255, 255, 0.08); color: var(--night-muted); }
.bars { display: flex; align-items: flex-end; gap: 0.375rem; height: 6rem; margin-top: 0.75rem; }
.bars span { flex: 1; background: linear-gradient(180deg, var(--signal), #ff8a5c); border-radius: 3px 3px 0 0; transform-origin: bottom; transform: scaleY(0.06); transition: transform 1.1s var(--ease); }
.bars span:nth-child(odd) { background: #3a3f45; }
.in-view .bars span { transform: scaleY(1); }
.bars span:nth-child(2) { transition-delay: 0.06s; } .bars span:nth-child(3) { transition-delay: 0.12s; } .bars span:nth-child(4) { transition-delay: 0.18s; }
.bars span:nth-child(5) { transition-delay: 0.24s; } .bars span:nth-child(6) { transition-delay: 0.3s; } .bars span:nth-child(7) { transition-delay: 0.36s; } .bars span:nth-child(8) { transition-delay: 0.42s; }
.bars span:nth-child(9) { transition-delay: 0.48s; } .bars span:nth-child(10) { transition-delay: 0.54s; } .bars span:nth-child(11) { transition-delay: 0.6s; } .bars span:nth-child(12) { transition-delay: 0.66s; }
.feature-rows { border-top: 1px solid var(--night-line); margin-top: 1.75rem; }
.feature-rows > div { display: grid; grid-template-columns: 2.125rem 1fr; gap: 0.875rem; padding: 1rem 0; border-bottom: 1px solid var(--night-line); }
.feature-rows .mono { color: var(--signal); font-size: 0.75rem; padding-top: 3px; }
.feature-rows b { display: block; font-weight: 500; color: var(--paper); margin-bottom: 2px; }
.feature-rows span { font-size: 0.875rem; color: var(--night-muted); }

/* Architecture diagram */
.arch { display: grid; grid-template-columns: 1fr auto 1.1fr auto 1fr; align-items: center; gap: 0.875rem; }
.arch-col { display: grid; gap: 0.5rem; }
.arch-node { padding: 0.75rem 0.875rem; border-radius: 0.75rem; background: var(--night-2); border: 1px solid var(--night-line); }
.arch-node b { display: block; font-weight: 500; font-size: 0.875rem; color: var(--paper); }
.arch-node span { font-family: var(--mono); font-size: 0.6562rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--night-muted); }
.arch-core { padding: 1.75rem 1.25rem; border-radius: 1.125rem; text-align: center; background: var(--signal); color: var(--ink); }
.arch-core b { display: block; font-size: 1.375rem; font-weight: 500; letter-spacing: -0.03em; }
.arch-core span { font-family: var(--mono); font-size: 0.6875rem; text-transform: uppercase; letter-spacing: 0.04em; }
.arch-line { width: 3rem; height: 1px; background: rgba(255, 255, 255, 0.3); position: relative; overflow: hidden; }
.arch-line::after { content: ""; position: absolute; top: -1px; height: 3px; width: 0.875rem; background: var(--signal); animation: flow 1.6s linear infinite; }
@keyframes flow { from { left: -14px; } to { left: 100%; } }

/* ---------- Catalog (rental) ---------- */
.catalog { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.875rem; }
.cat-card { display: flex; flex-direction: column; gap: 0.875rem; padding: 1.125rem; min-height: 14.375rem; border-radius: var(--r); background: var(--card); border: 1px solid var(--line); transition: border-color 0.25s, transform 0.35s var(--ease); }
.cat-card:hover { border-color: var(--ink); transform: translateY(-3px); }
.cat-card .top { display: flex; justify-content: space-between; align-items: flex-start; }
.cat-card .ico { width: 2.875rem; height: 2.875rem; border-radius: 0.75rem; background: var(--paper-2); display: grid; place-items: center; }
.cat-card .ico svg { width: 1.5rem; height: 1.5rem; color: var(--ink); }
.cat-card h3 { font-size: 1.0625rem; margin: 0; letter-spacing: -0.02em; }
.cat-card .spec { font-family: var(--mono); font-size: 0.7188rem; letter-spacing: 0.02em; color: var(--muted); line-height: 1.5; }
.cat-card .q { margin-top: auto; font-size: 0.8125rem; font-weight: 500; display: inline-flex; gap: 0.375rem; align-items: center; }
.cat-card .q svg { width: 0.8125rem; height: 0.8125rem; transition: transform 0.3s var(--ease); }
.cat-card:hover .q svg { transform: translateX(3px); }

/* ---------- Plans ---------- */
.plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.875rem; }
.plan { position: relative; display: flex; flex-direction: column; padding: 1.625rem; border-radius: var(--r); background: var(--card); border: 1px solid var(--line); }
.plan.featured { border-color: var(--signal); box-shadow: 0 0 0 1px var(--signal); }
.plan .badge { position: absolute; top: -0.6875rem; left: 1.5rem; font-family: var(--mono); font-size: 0.6562rem; letter-spacing: 0.08em; text-transform: uppercase; background: var(--signal); color: var(--ink); padding: 0.25rem 0.625rem; }
.plan h3 { font-size: 1.625rem; letter-spacing: -0.035em; margin-bottom: 0.25rem; }
.plan .term { font-size: 2.75rem; letter-spacing: -0.05em; font-weight: 400; margin: 1.125rem 0 2px; }
.plan .term small { font-size: 0.9375rem; color: var(--muted); letter-spacing: 0; }
.plan .btn { margin: 1.25rem 0 1.375rem; }
.plan .mono { margin-bottom: 0.75rem; display: block; }
.plan-wide { grid-column: 1 / -1; display: grid; grid-template-columns: 1fr 2fr auto; gap: 1.75rem; align-items: center; }
.plan-wide .checks { display: grid; grid-template-columns: 1fr 1fr; column-gap: 1.75rem; }
.plan-wide .btn { margin: 0; }

/* ---------- FAQ ---------- */
.faq-wrap { display: grid; grid-template-columns: 1fr 1.5fr; gap: clamp(1.75rem, 6vw, 6rem); align-items: start; }
.faq-wrap .head { margin: 0; grid-template-columns: 1fr; position: sticky; top: 7.5rem; }
.faq { border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { list-style: none; cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 1.25rem; padding: 1.375rem 0; font-size: 1.125rem; font-weight: 500; letter-spacing: -0.02em; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary i { position: relative; width: 0.875rem; height: 0.875rem; flex: none; }
.faq summary i::before, .faq summary i::after { content: ""; position: absolute; left: 0; top: 0.4062rem; width: 0.875rem; height: 1.5px; background: var(--ink); transition: transform 0.35s var(--ease); }
.faq summary i::after { transform: rotate(90deg); }
.faq details[open] summary i::after { transform: rotate(0); }
.faq details p { padding: 0 2.5rem 1.375rem 0; margin: 0; }

/* ---------- CTA panel ---------- */
.cta { display: grid; grid-template-columns: 1.2fr 1fr; border-radius: var(--r-lg); overflow: hidden; background: var(--ink); color: var(--paper); min-height: 23.75rem; }
.cta-copy { padding: clamp(1.75rem, 5vw, 4rem); display: flex; flex-direction: column; justify-content: space-between; gap: 2.25rem; }
.cta-copy h2 { color: var(--paper); margin: 0; }
.cta-copy p { color: var(--night-muted); margin: 0.875rem 0 0; max-width: 28.75rem; }
.cta-media { position: relative; }
.cta-media img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.cta-media::before { content: ""; position: absolute; inset: 0; z-index: 1; background: linear-gradient(90deg, var(--ink) 0%, rgba(17, 19, 21, 0) 40%); }

/* ---------- Page hero (inner pages) ---------- */
.page-hero { padding: 8.75rem 0 0; }
.crumbs { display: flex; gap: 0.5rem; font-family: var(--mono); font-size: 0.7188rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted); margin-bottom: 1.375rem; }
.crumbs a:hover { color: var(--ink); }
.crumbs span[aria-hidden] { opacity: 0.5; }
.page-hero .hero-top { align-items: end; }
.frames { display: grid; grid-template-columns: 2.2fr 1fr; gap: 0.875rem; margin-top: clamp(2rem, 4vw, 3.25rem); }
.frames.single { grid-template-columns: 1fr; }
.frame { position: relative; margin: 0; border-radius: var(--r-lg); overflow: hidden; background: var(--paper-2); height: clamp(20rem, 54vh, 40rem); border: 1px solid var(--line); }
.frame img { width: 100%; height: 100%; object-fit: cover; will-change: transform; }
.frame figcaption { position: absolute; left: 0.875rem; bottom: 0.875rem; display: flex; gap: 0.375rem; flex-wrap: wrap; }
.frame.side { display: flex; flex-direction: column; justify-content: flex-end; padding: 1.375rem; background: var(--card); }
.frame.side .num { margin-bottom: 0.625rem; }

/* ---------- Two/three column text grid ---------- */
.cols-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border-top: 1px solid var(--line); }
.cols-3 > div { padding: 1.625rem 1.625rem 0.625rem 0; }
.cols-3 > div + div { padding-left: 1.625rem; border-left: 1px solid var(--line); }
.cols-3 .mono { color: var(--signal-ink); display: block; margin-bottom: 1.125rem; }
.cols-3 h3 { margin-bottom: 0.625rem; }
.cols-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.875rem; }
.box { padding: 1.375rem; border-radius: var(--r); background: var(--card); border: 1px solid var(--line); }
.box .mono { color: var(--signal-ink); display: block; margin-bottom: 1.625rem; }
.box h3 { margin-bottom: 0.5rem; }
.box p { margin: 0; font-size: 0.9375rem; }

.related { display: flex; flex-wrap: wrap; gap: 0.625rem; margin-top: 1.75rem; }
.related a { display: inline-flex; align-items: center; gap: 0.5rem; height: 2.5rem; padding: 0 1rem; border-radius: 62.4375rem; border: 1px solid var(--line-2); font-size: 0.875rem; transition: border-color 0.2s, background 0.2s; }
.related a:hover { border-color: var(--ink); background: var(--card); }

/* ---------- Contact ---------- */
.contact { display: grid; grid-template-columns: 1fr 1.1fr; gap: clamp(2rem, 6vw, 6rem); align-items: start; }
.contact-side .checks { margin: 1.625rem 0 2.25rem; }
.contact-list { border-top: 1px solid var(--line); }
.contact-list > div { display: grid; grid-template-columns: 7.5rem 1fr; gap: 1rem; padding: 0.875rem 0; border-bottom: 1px solid var(--line); font-size: 0.9375rem; }
.contact-list dt { font-family: var(--mono); font-size: 0.7188rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted); padding-top: 3px; }
.contact-list dd { margin: 0; }
.contact-list a { border-bottom: 1px solid var(--line-2); }
.contact-list a:hover { border-color: var(--ink); }
.quote-card { margin-top: 1.875rem; padding: 1.375rem; border-radius: var(--r); background: var(--paper-2); }
.quote-card p { color: var(--ink-2); font-size: 0.9375rem; margin-bottom: 0.75rem; }
.form { background: var(--card); border: 1px solid var(--line); border-radius: 1.5rem; padding: clamp(1.375rem, 3vw, 2.25rem); box-shadow: var(--shadow); }
.form h2 { font-size: clamp(1.5rem, 2.2vw, 1.9rem); margin-bottom: 1.375rem; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.875rem 1rem; }
.form-grid .full { grid-column: 1 / -1; }
.field label, .field legend { display: block; font-size: 0.8125rem; font-weight: 500; margin-bottom: 0.4375rem; color: var(--ink-2); }
.field input, .field select, .field textarea { width: 100%; min-width: 0; height: 3rem; padding: 0 0.875rem; border-radius: 0.75rem; border: 1px solid var(--line-2); background: var(--paper); font: inherit; font-size: 0.9375rem; color: var(--ink); transition: border-color 0.2s, box-shadow 0.2s, background 0.2s; }
.field textarea { height: auto; min-height: 8rem; padding: 0.75rem 0.875rem; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--ink); background: #fff; box-shadow: 0 0 0 4px rgba(255, 91, 31, 0.18); }
fieldset.field { border: 0; margin: 0; padding: 0; min-width: 0; }
.chips { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.chips label { position: relative; margin: 0; }
.chips input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.chips span { display: inline-flex; align-items: center; height: 2.25rem; padding: 0 0.875rem; border-radius: 62.4375rem; border: 1px solid var(--line-2); font-size: 0.875rem; color: var(--ink-2); cursor: pointer; transition: all 0.2s; }
.chips input:checked + span { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.chips input:focus-visible + span { outline: 2px solid var(--signal); outline-offset: 2px; }
.form .btn { margin-top: 0.5rem; }
.form-note { font-size: 0.8125rem; color: var(--muted); margin: 0.875rem 0 0; }
.form-status { margin: 0.625rem 0 0; font-weight: 500; color: var(--ok); }

/* ---------- Footer ---------- */
.site-footer { padding: clamp(4rem, 8vw, 6.875rem) 0 1.75rem; border-top: 1px solid var(--line); overflow: hidden; }
.foot-top { display: grid; grid-template-columns: 1fr 1.25fr; gap: clamp(2rem, 6vw, 6rem); padding-bottom: 3.5rem; }
.foot-top h2 { font-size: clamp(1.8rem, 3vw, 2.6rem); margin-bottom: 1.375rem; }
.foot-products { border-top: 1px solid var(--line); }
.foot-products a { display: grid; grid-template-columns: 4.375rem 1fr auto; gap: 1rem; align-items: baseline; padding: 0.875rem 0; border-bottom: 1px solid var(--line); transition: padding 0.3s var(--ease); }
.foot-products a:hover { padding-left: 0.5rem; }
.foot-products .mono { font-size: 0.6875rem; }
.foot-products b { font-weight: 500; font-size: 1.0625rem; letter-spacing: -0.02em; }
.foot-products em { font-style: normal; font-family: var(--mono); font-size: 0.6875rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.04em; }
.foot-cols { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; padding: 2.5rem 0; border-top: 1px solid var(--line); }
.foot-cols .ttl { display: inline-block; font-family: var(--mono); font-size: 0.6875rem; letter-spacing: 0.06em; text-transform: uppercase; background: var(--paper-2); padding: 3px 0.5rem; margin-bottom: 1rem; color: var(--ink-2); }
.foot-cols li { margin-bottom: 0.5625rem; }
.foot-cols a { font-size: 0.9062rem; color: var(--ink-2); }
.foot-cols a:hover { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; }
.wordmark { font-size: clamp(4.5rem, 19.5vw, 19rem); font-weight: 600; letter-spacing: -0.07em; line-height: 0.78; margin: 0.625rem 0 1.625rem -0.04em; color: var(--ink); white-space: nowrap; user-select: none; }
.wordmark span { color: var(--signal); }
.foot-legal { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.75rem; padding-top: 1.125rem; border-top: 1px solid var(--line); font-family: var(--mono); font-size: 0.6875rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted); }
.foot-legal a:hover { color: var(--ink); }

/* ---------- Reveal ---------- */
.reveal { opacity: 0; transform: translateY(1.5rem); transition: opacity 0.9s var(--ease), transform 0.9s var(--ease); transition-delay: var(--d, 0s); }
.reveal.in-view { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }
.split-words .w { display: inline-block; overflow: hidden; vertical-align: top; padding-bottom: 0.1em; margin-bottom: -0.1em; }
.split-words .w > span { display: inline-block; transform: translateY(108%); transition: transform 1s var(--ease); }
.split-words.in-view .w > span { transform: none; }

.motion-toggle { position: fixed; left: 1rem; bottom: 1rem; z-index: 90; height: 2.375rem; padding: 0 0.875rem; border-radius: 62.4375rem; border: 1px solid var(--line-2); background: var(--card); font-family: var(--mono); font-size: 0.6875rem; letter-spacing: 0.04em; text-transform: uppercase; cursor: pointer; box-shadow: var(--shadow); }
.motion-toggle:hover { border-color: var(--ink); }

/* ---------- Responsive ---------- */
@media (max-width: 1280px) {
  .mega { grid-template-columns: repeat(5, 1fr); }
  .mega-list { grid-column: 1 / -1; border-left: 0; border-top: 1px solid var(--line); flex-direction: row; flex-wrap: wrap; align-items: center; }
  .mega-list .mono { margin: 0 0.25rem 0 0.5rem; }
  .mega-list a { gap: 0.375rem; }
}
@media (max-width: 1100px) {
  .svc-grid, .spec-tiles, .catalog { grid-template-columns: repeat(2, 1fr); }
  .bento { grid-template-columns: repeat(2, 1fr); }
  .station, .split, .contact, .stack-wrap, .faq-wrap, .foot-top { grid-template-columns: 1fr; }
  .split.flip > :first-child { order: 0; }
  .stack-intro, .faq-wrap .head { position: static; }
  .photo-frame { min-height: 23.75rem; }
  .mega { grid-template-columns: repeat(3, 1fr); }
  .mega-list { grid-column: 1 / -1; border-left: 0; border-top: 1px solid var(--line); flex-direction: row; flex-wrap: wrap; }
  .arch { grid-template-columns: 1fr; }
  .arch-line { width: 1px; height: 1.75rem; margin: 0 auto; }
  .arch-line::after { left: -1px !important; width: 3px; height: 0.625rem; animation: flowy 1.6s linear infinite; }
  @keyframes flowy { from { top: -10px; } to { top: 100%; } }
  .plans { grid-template-columns: 1fr; }
  .plan-wide { grid-template-columns: 1fr; }
}
@media (max-width: 960px) {
  .nav-pill, .nav-right .text-link, .nav-right .btn { display: none; }
  .nav-toggle { display: inline-flex; }
  .hero-top, .head { grid-template-columns: 1fr; }
  .head { align-items: start; }
  .proof { grid-template-columns: 1fr 1fr; }
  .proof > div:nth-child(2) { border-right: 0; }
  .proof > div:nth-child(3) { padding-left: 0; }
  .proof > div:nth-child(n+3) { border-top: 1px solid var(--line); }
  .stage-foot { grid-template-columns: repeat(2, 1fr); }
  .stage-foot > div:nth-child(2) { border-right: 0; }
  .stage-foot > div:nth-child(n+3) { border-top: 1px solid var(--line); }
  .stage-foot .ctrl { grid-column: 1 / -1; justify-content: space-between; }
  .media-cards { grid-template-columns: 1fr 1fr; }
  .row { grid-template-columns: 3.75rem 1fr; }
  .row > p, .row > div:last-child { grid-column: 2; }
  .lm-row { grid-template-columns: 12.5rem 1fr; }
  .lm-row .link-arrow { grid-column: 2; justify-self: start; }
  .cta { grid-template-columns: 1fr; }
  .cta-media { min-height: 16.25rem; }
  .cta-media::before { background: linear-gradient(180deg, var(--ink) 0%, rgba(17, 19, 21, 0) 45%); }
  .frames { grid-template-columns: 1fr; }
  .frame.side { height: auto; }
  .cols-3 { grid-template-columns: 1fr; }
  .cols-3 > div + div { padding-left: 0; border-left: 0; border-top: 1px solid var(--line); }
  .cols-4 { grid-template-columns: 1fr 1fr; }
  .foot-cols { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .hero { padding-top: 6.5rem; }
  .page-hero { padding-top: 6.875rem; }
  .stage { height: 28.75rem; border-radius: 1.25rem; }
  .stage-hud { flex-direction: column; top: 0.75rem; left: 0.75rem; right: 0.75rem; }
  .drag-hint { display: none; }
  .svc-grid, .spec-tiles, .catalog, .media-cards, .bento, .cols-4 { grid-template-columns: 1fr; }
  .bento .wide { grid-column: auto; }
  .svc { aspect-ratio: 4 / 3; }
  .proof { grid-template-columns: 1fr; }
  .proof > div { border-right: 0 !important; padding-left: 0 !important; border-top: 1px solid var(--line); }
  .proof > div:first-child { border-top: 0; }
  .lm-row { grid-template-columns: 1fr; }
  .lm-row .link-arrow { grid-column: auto; }
  .form-grid { grid-template-columns: 1fr; }
  .spec-table > div { grid-template-columns: 1fr; gap: 2px; }
  .contact-list > div { grid-template-columns: 1fr; gap: 2px; }
  .plan-wide .checks { grid-template-columns: 1fr; }
  .stack-card { position: relative; top: 0; }
  .hero-side .actions .btn, .page-hero .actions .btn { flex: 1 1 auto; }
  .st-label { font-size: 0.5625rem; padding: 0.3125rem 0.5rem; }
  .st-label span { display: none; }
}

/* Reduced motion — unless the visitor pressed "Enable animations" */
@media (prefers-reduced-motion: reduce) {
  html:not(.force-motion) *, html:not(.force-motion) *::before, html:not(.force-motion) *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
  html:not(.force-motion) .reveal { opacity: 1; transform: none; }
  html:not(.force-motion) .split-words .w > span { transform: none; }
}

/* v4.1 refinements */
.svc .idx { background: rgba(10, 11, 12, 0.45); padding: 0.25rem 0.5rem; border-radius: 0.375rem; backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px); }
.stage .views { position: absolute; left: 50%; bottom: 4.875rem; transform: translateX(-50%); z-index: 4; box-shadow: 0 10px 30px -14px rgba(17, 19, 21, 0.35); }
@media (max-width: 960px) { .stage .views { bottom: 8.5rem; max-width: calc(100% - 1.5rem); } }
.faq-wrap .head { gap: 1.125rem; }
@media (prefers-reduced-motion: reduce) { html:not(.force-motion) * { transition-delay: 0s !important; } }
.foot-cols li { font-size: 0.9062rem; color: var(--ink-2); }
.related a svg { width: 0.875rem; height: 0.875rem; }
.frame.side { justify-content: space-between; }
.dotmatrix { display: block; flex: 1; margin-bottom: 1.375rem; min-height: 7.5rem; border-radius: 0.75rem; background-image: radial-gradient(circle, rgba(17, 19, 21, 0.2) 1.4px, transparent 1.7px); background-size: 0.875rem 0.875rem; -webkit-mask-image: linear-gradient(180deg, #000 0%, rgba(0,0,0,.15) 100%); mask-image: linear-gradient(180deg, #000 0%, rgba(0,0,0,.15) 100%); position: relative; }
.dotmatrix::after { content: ""; position: absolute; left: 0; top: 0; width: 1.75rem; height: 1.75rem; background: var(--signal); }
.cta .tag { color: var(--night-muted); }
.foot-top[hidden] { display: none; }
@media (max-width: 640px) {
  .stage { height: 33.75rem; }
  .stage-foot { grid-template-columns: 1fr 1fr auto; }
  .stage-foot > div:nth-child(3), .stage-foot > div:nth-child(4) { display: none; }
  .stage-foot > div:nth-child(2) { border-right: 1px solid var(--line); }
  .stage-foot .ctrl { grid-column: auto; border-top: 0 !important; padding: 0.625rem 0.75rem; }
  .stage-foot > div { padding: 0.625rem 0.875rem; }
  .stage .views { bottom: 4.375rem; }
}

/* ==========================================================================
   v4.7 — resources, guides, article pages
   ========================================================================== */
.foot-cols { grid-template-columns: repeat(5, 1fr); }

.guides { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.875rem; }
.guide-card { display: flex; flex-direction: column; gap: 0.75rem; padding: 1.375rem; min-height: 16.25rem; border-radius: var(--r); background: var(--card); border: 1px solid var(--line); transition: border-color 0.25s, transform 0.35s var(--ease); }
.guide-card:hover { border-color: var(--ink); transform: translateY(-3px); }
.guide-card .mono { color: var(--signal-ink); }
.guide-card h3 { font-size: 1.3rem; margin: 0; }
.guide-card p { font-size: 0.9375rem; margin: 0; }
.guide-card .link-arrow { margin-top: auto; align-self: flex-start; font-size: 0.875rem; }
.head p .link-arrow { margin-left: 0.25rem; }

/* Article */
.article-hero .article-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 0.625rem 1.125rem; margin-bottom: 1.375rem; }
.article-hero .article-meta .tag { margin: 0; }
.article-hero h1 { font-size: clamp(2.3rem, 5vw, 4.3rem); max-width: 17ch; margin-bottom: 1.625rem; }
.article-lead { max-width: 47.5rem; }
.article-grid { display: grid; grid-template-columns: 15.625rem minmax(0, 46.25rem); gap: clamp(2rem, 6vw, 6rem); align-items: start; justify-content: start; }
.toc { position: sticky; top: 6.875rem; }
.toc > .mono { display: block; margin-bottom: 0.75rem; }
.toc ol { border-left: 1px solid var(--line); margin-bottom: 1.625rem; }
.toc li a { display: block; padding: 0.4375rem 0 0.4375rem 0.875rem; margin-left: -1px; border-left: 2px solid transparent; font-size: 0.875rem; line-height: 1.35; color: var(--muted); transition: color 0.2s, border-color 0.2s; }
.toc li a:hover { color: var(--ink); border-color: var(--signal); }
.toc-cta { padding: 1.125rem; border-radius: 0.875rem; background: var(--paper-2); }
.toc-cta b { font-weight: 500; }
.toc-cta p { font-size: 0.875rem; margin: 0.375rem 0 0.875rem; }

.prose { font-size: 1.0938rem; line-height: 1.72; color: var(--ink-2); }
.prose > :first-child { margin-top: 0; }
.prose h2 { font-size: clamp(1.55rem, 2.4vw, 2rem); letter-spacing: -0.03em; margin: 2.1em 0 0.6em; scroll-margin-top: 6.875rem; }
.prose h2:first-child { margin-top: 0; }
.prose p { color: var(--ink-2); margin: 0 0 1.1em; }
.prose b { font-weight: 600; color: var(--ink); }
.prose a:not(.btn) { color: var(--ink); text-decoration: underline; text-decoration-color: var(--signal); text-decoration-thickness: 1.5px; text-underline-offset: 3px; }
.prose a:not(.btn):hover { text-decoration-color: var(--ink); }
.prose ul:not(.checks), .prose ol { margin: 0 0 1.3em; padding-left: 1.25em; }
.prose ul:not(.checks) { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li { margin-bottom: 0.55em; padding-left: 0.2em; }
.prose figure { margin: 1.6em 0; }
.prose figure img { display: block; width: 100%; height: auto; border-radius: var(--r); border: 1px solid var(--line); background: var(--paper-2); }
.prose figcaption { margin-top: 0.6em; font-size: 0.875rem; line-height: 1.5; color: var(--muted); }
.prose li::marker { color: var(--signal-ink); }
.prose .checks { margin: 0 0 1.4em; }
.prose .checks li { font-size: 1.0312rem; }
.prose .table-wrap { overflow-x: auto; margin: 0 0 1.4em; border: 1px solid var(--line); border-radius: 0.875rem; background: var(--card); }
.prose table { width: 100%; border-collapse: collapse; font-size: 0.9375rem; min-width: 32.5rem; }
.prose th { font-family: var(--mono); font-size: 0.6875rem; letter-spacing: 0.05em; text-transform: uppercase; font-weight: 500; color: var(--muted); text-align: left; padding: 0.75rem 1rem; border-bottom: 1px solid var(--line-2); background: var(--paper-2); }
.prose td { padding: 0.75rem 1rem; border-bottom: 1px solid var(--line); color: var(--ink); }
.prose tr:last-child td { border-bottom: 0; }
.prose .callout { margin: 0 0 1.4em; padding: 1.125rem 1.25rem; border-left: 3px solid var(--signal); border-radius: 0 0.75rem 0.75rem 0; background: var(--paper-2); font-size: 1rem; }
.prose .formula { margin: 0 0 1.2em; padding: 1rem 1.125rem; border-radius: 0.75rem; background: var(--card); border: 1px solid var(--line); font-family: var(--mono); font-size: 0.875rem; line-height: 1.8; color: var(--ink); }
.prose .byline { margin-top: 2.4em; padding-top: 1.125rem; border-top: 1px solid var(--line); font-size: 0.875rem; color: var(--muted); }

@media (max-width: 1100px) {
  .guides { grid-template-columns: repeat(2, 1fr); }
  .foot-cols { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 960px) {
  .article-grid { grid-template-columns: 1fr; }
  .toc { position: static; }
  .toc-cta { display: none; }
  .foot-cols { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .guides { grid-template-columns: 1fr; }
  .guide-card { min-height: 0; }
  .prose { font-size: 1.0312rem; }
}
.prose .checks li { padding-left: 1.625rem; }
.article-grid > * { min-width: 0; }
@media (max-width: 960px) { .article-grid { grid-template-columns: minmax(0, 1fr); } }
.form-done { padding: 0.75rem 0; }
.form-done h2 { margin-bottom: 0.625rem; }
.form-done .btn { margin-top: 0.625rem; }

/* ==========================================================================
   v5.9 — Preloader (first page of a visit) and 3D stage loading state
   ========================================================================== */
.preloader { display: none; }
.is-loading .preloader {
  display: block; position: fixed; inset: 0; z-index: 10000; background: var(--paper); color: var(--ink); overflow: hidden;
  animation: pl-failsafe 0.01s linear 5s forwards; /* never trap the page if the script can't run */
}
.preloader::before { /* dot grid rising from the bottom-right, like the stage */
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: radial-gradient(rgba(17, 19, 21, 0.16) 1px, transparent 1.3px); background-size: 1.375rem 1.375rem;
  -webkit-mask-image: radial-gradient(110% 80% at 85% 100%, #000 10%, transparent 72%); mask-image: radial-gradient(110% 80% at 85% 100%, #000 10%, transparent 72%);
}
.pl-top, .pl-bottom { position: absolute; left: var(--gutter); right: var(--gutter); display: flex; justify-content: space-between; gap: 1.5rem; transition: opacity 0.45s var(--ease), transform 0.6s var(--ease); }
.pl-top { top: clamp(1.25rem, 3.4vw, 2.25rem); align-items: center; }
.pl-bottom { bottom: clamp(1.75rem, 5vw, 3.75rem); align-items: flex-end; }
.pl-brand { display: inline-flex; align-items: center; gap: 0.75rem; font-size: 1.3125rem; font-weight: 600; letter-spacing: -0.02em; animation: pl-rise 0.9s var(--ease) both; }
.pl-brand img { width: 2.125rem; height: 2.125rem; }
.pl-brand small { font-family: var(--mono); font-size: 0.625rem; font-weight: 400; letter-spacing: 0.16em; color: var(--muted); margin-left: -0.25rem; }
.pl-meta { font-family: var(--mono); font-size: 0.6875rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); animation: pl-rise 0.9s var(--ease) 0.1s both; }
.pl-step { display: flex; flex-direction: column; gap: 1rem; min-width: 0; animation: pl-rise 0.5s var(--ease) both; }
.pl-status { display: flex; align-items: center; gap: 0.625rem; font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-2); white-space: nowrap; }
.pl-status i { width: 0.5rem; height: 0.5rem; background: var(--signal); animation: pl-blink 0.9s steps(2) infinite; }
.pl-status em { font-style: normal; }
.pl-chips { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.pl-chips span { font-family: var(--mono); font-size: 0.6875rem; letter-spacing: 0.06em; padding: 0.375rem 0.6875rem; border: 1px solid var(--line-2); border-radius: 62.4375rem; color: var(--tone); transition: color 0.4s, border-color 0.4s, background 0.4s; }
.pl-chips span.on { color: var(--ink); border-color: var(--ink); background: var(--card); }
.pl-chips span.on::before { content: ""; display: inline-block; width: 0.375rem; height: 0.375rem; margin-right: 0.4375rem; border-radius: 50%; background: var(--ok); vertical-align: 1px; }
.pl-count { font-size: clamp(5.5rem, 17vw, 16.25rem); font-weight: 500; letter-spacing: -0.065em; line-height: 0.78; font-variant-numeric: tabular-nums; animation: pl-rise 0.5s var(--ease) both; }
.pl-count sup { font-size: 0.14em; font-weight: 400; letter-spacing: 0; vertical-align: top; margin-left: 0.2em; color: var(--muted); font-family: var(--mono); }
.pl-bar { position: absolute; left: 0; right: 0; bottom: 0; height: 3px; background: rgba(17, 19, 21, 0.08); }
.pl-bar i { display: block; height: 100%; background: var(--signal); transform-origin: left center; transform: scaleX(var(--p, 0)); }
.preloader .mark { position: absolute; width: 0.875rem; height: 0.875rem; border-color: var(--ink); border-style: solid; opacity: 0.4; }
.preloader .mark.tl { top: 0.875rem; left: 0.875rem; border-width: 1px 0 0 1px; }
.preloader .mark.tr { top: 0.875rem; right: 0.875rem; border-width: 1px 1px 0 0; }
.preloader .mark.bl { bottom: 0.875rem; left: 0.875rem; border-width: 0 0 1px 1px; }
.preloader .mark.br { bottom: 0.875rem; right: 0.875rem; border-width: 0 1px 1px 0; }
/* exit: contents lift away, then the panel wipes up to reveal the page */
.preloader.done .pl-top, .preloader.done .pl-bottom { opacity: 0; transform: translateY(-1.75rem); }
.preloader.done { transform: translateY(-100%); transition: transform 0.65s cubic-bezier(0.77, 0, 0.18, 1) 0.1s; }
@keyframes pl-rise { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
@keyframes pl-blink { 50% { opacity: 0.15; } }
@keyframes pl-failsafe { to { visibility: hidden; opacity: 0; } }
@media (max-width: 640px) { .pl-meta { display: none; } .pl-bottom { flex-direction: column-reverse; align-items: flex-start; } .pl-count { font-size: 30vw; } }
@media (prefers-reduced-motion: reduce) {
  html:not(.force-motion) .preloader.done { transform: none; opacity: 0; transition: opacity 0.4s; }
  html:not(.force-motion) .pl-status i { animation: none; }
}

/* 3D stage: no photo while the scene loads, a slim loader instead; the photo is only a fallback when 3D can't run */
.stage-fallback { display: none; }
.stage.no-3d .stage-fallback { display: block; opacity: 1; }
.stage-loading { position: absolute; left: 50%; top: 46%; z-index: 2; width: min(15rem, 60%); transform: translate(-50%, -50%); text-align: center; transition: opacity 0.5s; }
.stage-loading span { display: block; margin-bottom: 0.75rem; font-family: var(--mono); font-size: 0.6875rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }
.stage-loading i { display: block; height: 2px; background: rgba(17, 19, 21, 0.1); overflow: hidden; }
.stage-loading i::after { content: ""; display: block; height: 100%; background: var(--signal); transform-origin: left center; transform: scaleX(var(--p3d, 0.04)); transition: transform 0.3s; }
.stage.is-ready .stage-loading, .stage.no-3d .stage-loading { opacity: 0; pointer-events: none; }

/* ==========================================================================
   v6.1 — Home: full-width 3D stage on top (under the transparent header), headline below
   ========================================================================== */
.hero-wide { padding-top: 0; --edge: max(var(--gutter), calc((100% - var(--container)) / 2 + var(--gutter))); }
.hero-wide .stage { margin: 0; height: clamp(32.5rem, 78svh, 58.75rem); border: 0; border-bottom: 1px solid var(--line); border-radius: 0; }
.hero-wide .stage.reveal { transform: none; }
.hero-wide .stage .mark { display: none; }
.hero-wide .stage-hud { top: 5.75rem; left: var(--edge); right: var(--edge); }
.hero-wide .stage-foot { padding-inline: max(0px, calc(var(--edge) - 1.125rem)); }
.hero-wide .hero-top { margin-top: clamp(2.5rem, 5vw, 4.5rem); }
@media (max-width: 1100px) { .hero-wide .stage { height: clamp(28.75rem, min(78svh, 80vw), 58.75rem); } }
@media (min-width: 641px) and (max-width: 960px) {
  /* tablets: stats in one row so the view switcher is not hidden behind a three-row footer */
  .hero-wide .stage-foot { grid-template-columns: repeat(4, 1fr) auto; }
  .hero-wide .stage-foot > div { border-top: 0 !important; border-right: 1px solid var(--line); padding: 0.75rem 0.875rem; }
  .hero-wide .stage-foot .ctrl { grid-column: auto; border-right: 0; }
  .hero-wide .stage-foot .drag-hint { display: none; }
  .hero-wide .stage .views { bottom: 4.875rem; }
}
@media (max-width: 640px) {
  .hero-wide .stage { height: clamp(28.75rem, 68svh, 37.5rem); }
  .hero-wide .stage-hud { top: 5.5rem; }
  .hero-wide .stage-foot { padding-inline: 0; }
}

/* ==========================================================================
   v6.2 — Home hero: realistic film by default, interactive 3D on request
   ========================================================================== */
.stage-video { position: absolute; inset: 0; z-index: 1; }
.stage-video video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; transition: opacity 0.9s var(--ease); }
.stage-video video.on { opacity: 1; }
.hero-wide .stage-video::after { content: ""; position: absolute; inset: 0 0 auto; height: 10.625rem; z-index: 1; pointer-events: none; background: linear-gradient(180deg, rgba(243, 241, 236, 0.8), rgba(243, 241, 236, 0)); }
.stage.mode-video .stage-canvas, .stage.mode-video .stage-fallback { visibility: hidden; }
.stage.mode-3d .stage-video { visibility: hidden; }
.stage.mode-video .m-3d, .stage.mode-3d .m-video { display: none !important; }
.stage.mode-video.video-ready .stage-loading { opacity: 0; pointer-events: none; }
.views .mode-btn { display: inline-flex; align-items: center; gap: 0.5rem; font-weight: 500; color: var(--ink); }
.views .mode-btn svg { width: 0.9375rem; height: 0.9375rem; flex: none; }
.views .mode-btn[data-mode="3d"] { padding: 0 1.125rem; }

/* ==========================================================================
   v7 — Brand system. Every shape below comes from the logo (assets/img/logo.svg, a 64-unit tile):
   the T (6.5-unit strokes, round caps) and the signal arcs (concentric, radii 9 and 16 units, 7 apart,
   3.5-unit strokes, the inner arc in signal, the outer in signal tint). Tile corners: 15 / 64.
   At 2px a unit: arcs every 14px, the first at 18px. Brand book: the Telvonic Brand System design system.
   ========================================================================== */
:root {
  --signal-tint: #ffac8c;        /* the logo's outer arc */
  --arc-step: 0.875rem;          /* 7 units: from one arc to the next */
  --arc-r1: 1.125rem;            /* 9 units: the first arc */
  --mark-radius: 23.4%;          /* 15 / 64: the app tile's corners */
  --t-grid: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' fill='none' stroke='%23fff' stroke-opacity='.11' stroke-width='1.2' stroke-linecap='round'%3E%3Cpath d='M9 9.5h6M12 9.5v5'/%3E%3C/svg%3E");
  --t-grid-ink: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' fill='none' stroke='%23111315' stroke-opacity='.13' stroke-width='1.2' stroke-linecap='round'%3E%3Cpath d='M9 9.5h6M12 9.5v5'/%3E%3C/svg%3E");
}

/* Secondary texture: the T, set on a 24px grid (night bands; replaces the plain dot grid) */
.t-grid { background-image: var(--t-grid); background-size: 1.5rem 1.5rem; background-position: center top; }
.t-grid-ink { background-image: var(--t-grid-ink); background-size: 1.5rem 1.5rem; }

/* Primary motif: signal arcs from a card's bottom-right corner. The first two arcs are the logo's own
   (signal, signal tint); hairline echoes follow at the same 7-unit step and fade out. On interactive cards
   the echoes travel outward on hover, like the signal leaving the mark. */
@property --bp-ph { syntax: "<length>"; inherits: false; initial-value: 0px; }
@property --bp-ink { syntax: "<color>"; inherits: false; initial-value: rgba(17, 19, 21, 0.06); }
@property --bp-sig { syntax: "<color>"; inherits: false; initial-value: rgba(255, 91, 31, 0.5); }
@property --bp-sig2 { syntax: "<color>"; inherits: false; initial-value: rgba(255, 172, 140, 0.55); }
.bp, .cat-card, .guide-card, .box, .plan, .station-card, .spec-tile, .frame.side, .quote-card, .toc-cta, .stack-card,
.bento > :not(.photo), .night .spec-tile, .stack-card:nth-child(n), .lm-dash .dash-cell {
  --bp-ground: var(--card);
  --bp-ink: rgba(17, 19, 21, 0.06);
  --bp-sig: rgba(255, 91, 31, 0.5);
  --bp-sig2: rgba(255, 172, 140, 0.55);
  --bp-w: 1.25px;
  --bp-reach: 15rem;
  --bp-a: calc(var(--arc-r1) - var(--bp-w));
  --bp-b: calc(var(--arc-r1) + var(--bp-w));
  --bp-c: calc(var(--arc-r1) + var(--arc-step) - var(--bp-w));
  --bp-d: calc(var(--arc-r1) + var(--arc-step) + var(--bp-w));
  --bp-e: calc(var(--arc-r1) - var(--arc-step) + var(--bp-ph));
  background-image:
    radial-gradient(circle at 100% 100%, rgba(0, 0, 0, 0) calc(var(--bp-reach) * 0.28), var(--bp-ground) var(--bp-reach)),
    radial-gradient(circle at 100% 100%, rgba(0, 0, 0, 0) var(--bp-a), var(--bp-sig) var(--bp-a) var(--bp-b), rgba(0, 0, 0, 0) var(--bp-b)),
    radial-gradient(circle at 100% 100%, rgba(0, 0, 0, 0) var(--bp-c), var(--bp-sig2) var(--bp-c) var(--bp-d), rgba(0, 0, 0, 0) var(--bp-d)),
    repeating-radial-gradient(circle at 100% 100%, var(--bp-ink) var(--bp-e), var(--bp-ink) calc(var(--bp-e) + 1px), rgba(0, 0, 0, 0) calc(var(--bp-e) + 1px), rgba(0, 0, 0, 0) calc(var(--bp-e) + var(--arc-step)));
  background-repeat: no-repeat;
}
/* grounds other than the card */
.quote-card, .toc-cta { --bp-ground: var(--paper-2); }
.stack-card:nth-child(2) { --bp-ground: #ece7dd; }
.stack-card:nth-child(3) { --bp-ground: #ddd6c8; --bp-ink: rgba(17, 19, 21, 0.08); }
.stack-card:nth-child(4), .bento .ink { --bp-ground: var(--ink); --bp-ink: rgba(255, 255, 255, 0.07); }
.stack-card:nth-child(5) { --bp-ground: var(--signal); --bp-ink: rgba(17, 19, 21, 0.12); --bp-sig: rgba(17, 19, 21, 0.55); --bp-sig2: rgba(17, 19, 21, 0.3); }
.night .spec-tile { --bp-ground: var(--night-2); --bp-ink: rgba(255, 255, 255, 0.07); }
/* interactive cards: arcs at full strength, echoes travel outward while hovered or focused */
.cat-card, .guide-card, .plan, .bp-live {
  transition: border-color 0.25s, transform 0.35s var(--ease), --bp-sig 0.45s, --bp-sig2 0.45s, --bp-ink 0.45s;
}
.cat-card:hover, .cat-card:focus-visible, .guide-card:hover, .guide-card:focus-visible, .plan:hover, .bp-live:hover {
  --bp-sig: var(--signal); --bp-sig2: var(--signal-tint); --bp-ink: rgba(17, 19, 21, 0.1);
  animation: bp-emit 1.6s linear infinite;
}
@keyframes bp-emit { from { --bp-ph: 0px; } to { --bp-ph: var(--arc-step); } }

/* ---------- Line Manager: interactive dashboard ---------- */
.feature-rows > [data-lm] { position: relative; cursor: pointer; transition: padding 0.45s var(--ease); }
.feature-rows > [data-lm]:focus-visible { outline-offset: 0.25rem; }
.feature-rows > [data-lm]::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 1px; background: var(--signal);
  transform: scaleX(0); transform-origin: left center; transition: transform 0.4s var(--ease);
}
.feature-rows > [data-lm].on { padding-left: 0.5rem; }
.feature-rows > [data-lm].on::after { transform: scaleX(1); transition: transform var(--lm-dwell, 4.2s) linear; }
.feature-rows > [data-lm].on.held::after { transition-duration: 0.5s; }
.feature-rows > [data-lm] .mono { align-self: start; justify-self: start; padding: 0.125rem 0.3125rem; margin: 0.0625rem 0 0 -0.3125rem; transition: background 0.3s, color 0.3s; }
.feature-rows > [data-lm].on .mono { background: var(--signal); color: var(--ink); }
.feature-rows > [data-lm] b { transition: color 0.3s; }
.feature-rows > [data-lm]:hover b { color: #fff; }

.lm-dash { position: relative; --mx: 50%; --my: 40%; }
.lm-dash::after {
  content: ""; position: absolute; inset: 0; z-index: 3; pointer-events: none; opacity: 0; transition: opacity 0.4s;
  background: radial-gradient(18rem circle at var(--mx) var(--my), rgba(255, 91, 31, 0.1), rgba(255, 91, 31, 0) 70%);
}
.lm-dash.is-pointer::after { opacity: 1; }
.lm-dash.reveal.in-view.is-tilt { transform: perspective(1400px) rotateX(var(--tx, 0deg)) rotateY(var(--ty, 0deg)); transition: transform 0.3s ease-out, opacity 0.9s var(--ease); }
.lm-dash .dash-cell {
  position: relative; --bp-ground: #15181b; --bp-ink: rgba(255, 255, 255, 0); --bp-sig: rgba(255, 91, 31, 0); --bp-sig2: rgba(255, 172, 140, 0); --bp-reach: 11rem;
  background-color: #15181b; transition: opacity 0.45s var(--ease), --bp-sig 0.45s, --bp-sig2 0.45s, --bp-ink 0.45s;
}
.lm-dash[data-focus] .dash-cell:not(.lm-hit) { opacity: 0.4; }
.lm-dash .dash-cell.lm-hit { --bp-sig: var(--signal); --bp-sig2: var(--signal-tint); --bp-ink: rgba(255, 255, 255, 0.07); animation: bp-emit 1.6s linear infinite; }
.lm-dash .big b { font-weight: 400; }
/* station status: the running row shows the test step it is on, and its progress */
.lm-dash .st-rows div { position: relative; }
.lm-dash .st-rows div.is-run::after {
  content: ""; position: absolute; left: 0; bottom: -1px; height: 1px; width: 100%; background: var(--signal);
  transform-origin: left center; transform: scaleX(var(--p, 0.35)); transition: transform 0.45s var(--ease);
}
.lm-dash .st-pill { white-space: nowrap; transition: background 0.3s, color 0.3s; }
/* unit trace: one serial number from scan to MES */
.trace { display: flex; margin-top: 0.875rem; }
.trace li { position: relative; flex: 1; display: flex; flex-direction: column; gap: 0.5rem; min-width: 0; font-family: var(--mono); font-size: 0.625rem; letter-spacing: 0.05em; text-transform: uppercase; color: var(--night-muted); transition: color 0.3s; }
.trace li::before { content: ""; position: relative; z-index: 1; width: 0.625rem; height: 0.625rem; border-radius: 50%; border: 1.5px solid #3a3f45; background: #15181b; transition: background 0.3s, border-color 0.3s, box-shadow 0.3s; }
.trace li::after { content: ""; position: absolute; left: 0.625rem; right: 0; top: 0.3125rem; height: 1px; background: #3a3f45; transition: background 0.3s; }
.trace li:last-child::after { display: none; }
.trace li.done { color: #d5d8dc; }
.trace li.done::before { background: var(--ok); border-color: var(--ok); }
.trace li.done::after { background: rgba(14, 159, 110, 0.6); }
.trace li.now { color: var(--paper); }
.trace li.now::before { background: var(--signal); border-color: var(--signal); box-shadow: 0 0 0 4px rgba(255, 91, 31, 0.22); }
/* output bars: hover a bar for its hour */
.lm-dash .bars span { position: relative; transition: transform 1.1s var(--ease), background 0.2s; }
.lm-dash .bars.regrow span { transform: scaleY(0.06); transition: none; }
.lm-dash .bars span:hover { background: var(--signal-tint); }
.lm-dash .bars span::after {
  content: attr(data-v); position: absolute; left: 50%; bottom: calc(100% + 0.375rem); transform: translateX(-50%);
  padding: 0.1875rem 0.4375rem; border-radius: 0.375rem; background: var(--paper); color: var(--ink);
  font-family: var(--mono); font-size: 0.625rem; letter-spacing: 0.04em; white-space: nowrap; opacity: 0; pointer-events: none; transition: opacity 0.2s;
}
.lm-dash .bars span:hover::after { opacity: 1; }
.lm-dash .bars span:first-child::after { left: 0; transform: none; }
.lm-dash .bars span:last-child::after { left: auto; right: 0; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html:not(.force-motion) .lm-dash .dash-cell.lm-hit, html:not(.force-motion) .cat-card:hover, html:not(.force-motion) .guide-card:hover, html:not(.force-motion) .plan:hover { animation: none; }
}

/* ---------- How we deliver: the step list follows the scroll; each card draws what its step produces ---------- */
.stack-steps { position: relative; margin: 1.75rem 0 2rem; border-left: 1px solid var(--line-2); counter-reset: none; }
.stack-steps::before { content: ""; position: absolute; left: -1px; top: 0; width: 2px; height: calc(var(--prog, 0) * 100%); background: var(--signal); transition: height 0.25s linear; }
.stack-steps li { display: flex; align-items: baseline; gap: 0.75rem; padding: 0.4375rem 0 0.4375rem 1rem; font-size: 0.9375rem; color: var(--tone); transition: color 0.35s, transform 0.45s var(--ease); }
.stack-steps li span { font-family: var(--mono); font-size: 0.6875rem; letter-spacing: 0.04em; transition: color 0.35s; }
.stack-steps li.done { color: var(--ink-2); }
.stack-steps li.on { color: var(--ink); transform: translateX(0.375rem); }
.stack-steps li.on span { color: var(--signal-ink); }

@media (min-width: 1101px) { .stack-wrap { grid-template-columns: 0.8fr 1.35fr; } }
.stack-card { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 16.5rem); grid-template-rows: auto 1fr; gap: 1.5rem 2.25rem; transition: --bp-sig 0.5s, --bp-sig2 0.5s, --bp-ink 0.5s; }
.stack-card > .step-n { grid-column: 1; grid-row: 1; }
.stack-card > div { grid-column: 1; grid-row: 2; align-self: end; }
.stack-card > .viz { grid-column: 2; grid-row: 1 / span 2; align-self: center; margin: 0; }
.stack-card .step-n { position: relative; transition: background 0.4s, color 0.4s, border-color 0.4s; }
.stack-card .step-n::before {
  content: ""; position: absolute; inset: -0.3125rem; border-radius: 50%;
  background: conic-gradient(var(--signal) calc(var(--sp, 0) * 360deg), rgba(0, 0, 0, 0) 0);
  -webkit-mask: radial-gradient(farthest-side, rgba(0, 0, 0, 0) calc(100% - 2px), #000 calc(100% - 1.5px));
  mask: radial-gradient(farthest-side, rgba(0, 0, 0, 0) calc(100% - 2px), #000 calc(100% - 1.5px));
}
.stack-card.is-active .step-n { background: var(--signal); border-color: var(--signal); color: var(--ink); }
.stack-card.is-active { --bp-sig: var(--signal); --bp-sig2: var(--signal-tint); animation: bp-emit 1.6s linear infinite; }
.stack-card:nth-child(4).is-active { --bp-ink: rgba(255, 255, 255, 0.1); }
.stack-card:nth-child(5) .step-n::before { background: conic-gradient(var(--ink) calc(var(--sp, 0) * 360deg), rgba(0, 0, 0, 0) 0); }
.stack-card:nth-child(5).is-active .step-n { background: var(--ink); border-color: var(--ink); color: var(--signal); }
.stack-card:nth-child(5).is-active { --bp-sig: var(--ink); --bp-sig2: rgba(17, 19, 21, 0.45); }
/* cards that the next one slides over sink back a little */
.stack-cards.stack-anim .stack-card { transform-origin: 50% 0; transform: scale(calc(1 - var(--cover, 0) * 0.05)); filter: brightness(calc(1 - var(--cover, 0) * 0.06)); }
.stack-cards.stack-anim .stack-card > div > * { transition: transform 0.8s var(--ease), opacity 0.8s var(--ease); }
.stack-cards.stack-anim .stack-card:not(.seen) > div > * { transform: translateY(1.125rem); opacity: 0; }
.stack-cards.stack-anim .stack-card > div > p { transition-delay: 0.08s; }

/* the drawings */
.viz { --v-ink: var(--ink); --v-muted: var(--muted); --v-line: rgba(17, 19, 21, 0.16); --v-acc: var(--signal); --v-box: rgba(17, 19, 21, 0.05); --v-on-acc: var(--ink); }
.stack-card:nth-child(4) .viz { --v-ink: var(--paper); --v-muted: var(--night-muted); --v-line: rgba(255, 255, 255, 0.18); --v-box: rgba(255, 255, 255, 0.06); }
.stack-card:nth-child(5) .viz { --v-acc: var(--ink); --v-muted: #3b1a0c; --v-line: rgba(17, 19, 21, 0.22); --v-box: rgba(17, 19, 21, 0.08); --v-on-acc: var(--signal); }
.viz svg { display: block; width: 100%; height: auto; overflow: visible; }
.viz text { font-family: var(--mono); font-size: 9px; letter-spacing: 0.06em; fill: var(--v-muted); }
.viz .vt-s { font-size: 8px; }
.viz .vk { fill: var(--v-ink); font-weight: 500; }
.viz .vbig { font-family: var(--sans); font-size: 26px; letter-spacing: -0.04em; fill: var(--v-ink); }
.viz .vbig-s { font-size: 18px; }
.viz .vacc { fill: var(--v-acc); }
.viz .vs { stroke: var(--v-ink); stroke-width: 1.4; stroke-linecap: round; stroke-linejoin: round; }
.viz .vthick { stroke-width: 2.2; }
.viz .vl { stroke: var(--v-line); stroke-width: 1; stroke-linecap: round; }
.viz .va { stroke: var(--v-acc); stroke-width: 1.4; stroke-linecap: round; }
.viz .dash { stroke-dasharray: 0.02 0.015; }
.viz .vtrack { fill: var(--v-box); stroke: var(--v-line); }
.viz .vfill { fill: var(--v-acc); }
.viz .vbox { fill: var(--v-box); stroke: var(--v-line); }
.viz .vfillbox { fill: var(--v-acc); }
.viz .vcore { fill: var(--v-acc); }
.viz .vcore-t { fill: var(--v-on-acc); font-weight: 500; }
.viz .vchip { fill: none; stroke: var(--v-acc); }
.viz .vchip-t { fill: var(--v-ink); }
.viz .vok { fill: var(--ok); }
.viz .vok-t { stroke: #fff; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.viz .vdot { fill: var(--v-ink); }
.viz .vlive { fill: var(--ok); }
.viz .varea { fill: var(--v-acc); fill-opacity: 0.1; }
.stack-card:nth-child(5) .viz .varea { fill-opacity: 0.16; }
.viz .vend { fill: var(--v-acc); }
.viz .vend-ring { fill: none; stroke: var(--v-acc); opacity: 0; }
.viz .flow { stroke-width: 2.4; stroke-dasharray: 0.07 0.93; stroke-dashoffset: 0.07; opacity: 0; }
.viz .pop, .viz .grow, .viz .vend-ring { transform-box: fill-box; }
.viz .grow { transform-origin: left center; }
.viz .pop { transform-origin: center; }
/* before a card has been seen the drawing is blank; it draws once when the card scrolls in */
.stack-anim .viz .draw { stroke-dasharray: 1; stroke-dashoffset: 1; }
.stack-anim .viz .dash.draw { stroke-dasharray: 0.02 0.015; stroke-dashoffset: 0; opacity: 0; }
.stack-anim .viz .pop, .stack-anim .viz .fade { opacity: 0; }
.stack-anim .viz .grow { transform: scaleX(0); }
.stack-anim .seen .viz .draw { animation: v-draw 1.1s var(--ease) var(--d, 0s) forwards; }
.stack-anim .seen .viz .dash.draw { animation: v-fade 0.8s ease var(--d, 0s) forwards; }
.stack-anim .seen .viz .pop { animation: v-pop 0.6s var(--ease) var(--d, 0s) forwards; }
.stack-anim .seen .viz .fade { animation: v-fade 0.9s ease var(--d, 0s) forwards; }
.stack-anim .seen .viz .grow { animation: v-grow 1.2s var(--ease) var(--d, 0s) forwards; }
/* while a card is on top: signals run along the cables, the latest yield point pings */
.stack-anim .is-active .viz .flow { opacity: 1; animation: v-flow 1.6s linear calc(1.4s + var(--d, 0s)) infinite; }
.stack-anim .is-active .viz .vend-ring { animation: v-ring 1.8s ease-out 2s infinite; }
@keyframes v-draw { to { stroke-dashoffset: 0; } }
@keyframes v-pop { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: none; } }
@keyframes v-fade { to { opacity: 1; } }
@keyframes v-grow { to { transform: scaleX(1); } }
@keyframes v-flow { from { stroke-dashoffset: 0.07; } to { stroke-dashoffset: -0.93; } }
@keyframes v-ring { from { opacity: 0.9; transform: scale(1); } to { opacity: 0; transform: scale(3.2); } }
.viz .vend-ring { transform-origin: center; }
@media (max-width: 1100px) { .stack-card { grid-template-columns: minmax(0, 1fr) minmax(0, 15rem); } }
@media (max-width: 640px) {
  .stack-steps { display: none; }
  .stack-card { grid-template-columns: 1fr; grid-template-rows: auto auto auto; }
  .stack-card > .viz { grid-column: 1; grid-row: 3; max-width: 17.5rem; }
  .stack-cards.stack-anim .stack-card { transform: none; filter: none; }
}

/* ---------- High-speed cable & VNA: drawn system, analyzer range ---------- */
.frame.frame-draw { height: auto; display: flex; align-items: center; background: var(--card); }
.frame.draw-wide { margin: 0 0 clamp(1.5rem, 3vw, 2.5rem); }
.frame-draw > svg, .draw-frame > svg { display: block; width: 100%; height: auto; }
.photo-frame.draw-frame { display: grid; place-items: center; min-height: 0; padding: clamp(1rem, 3vw, 2rem) clamp(1rem, 3vw, 2rem) 3.75rem; background: var(--card); }
.cts-viz .cts-trace { stroke-dasharray: 1; animation: cts-trace 2s cubic-bezier(0.4, 0, 0.2, 1) infinite; }
@keyframes cts-trace { 0% { stroke-dashoffset: 1; } 72%, 100% { stroke-dashoffset: 0; } }
.cts-viz .cts-flow { stroke-dasharray: 0.06 0.94; stroke-dashoffset: 0.06; animation: cts-flow 2s linear var(--d, 0s) infinite; }
@keyframes cts-flow { to { stroke-dashoffset: -0.94; } }
/* the four rings step to the next differential pair every 2 s */
.cts-viz .cts-scan { animation: cts-scan 16s steps(8) infinite; }
.cts-viz .cts-scan-mx { animation-name: cts-scan-mx; }
@keyframes cts-scan { to { transform: translateX(128px); } }
@keyframes cts-scan-mx { to { transform: translateX(147.2px); } }
.cts-viz .cts-prog { transform-box: fill-box; transform-origin: left center; transform: scaleX(0.6); animation: cts-prog 2s linear infinite; }
@keyframes cts-prog { from { transform: scaleX(0); } to { transform: scaleX(1); } }
@media (prefers-reduced-motion: reduce) { html:not(.force-motion) .cts-viz .cts-flow { opacity: 0; } }
.measure-tiles .spec-tile { justify-content: flex-start; }
.measure-tiles .checks { margin: 1.5rem 0 0; }
.measure-tiles .checks li { font-size: 0.875rem; }
.std-row { display: grid; grid-template-columns: 1.4fr 1fr; gap: 2rem; margin-top: 2.25rem; padding-top: 1.75rem; border-top: 1px solid var(--night-line); }
.std-row .mono { display: block; margin-bottom: 0.875rem; color: var(--night-muted); }
.std-chips { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.night .std-chips .chip { background: rgba(255, 255, 255, 0.04); border-color: var(--night-line); color: var(--paper); backdrop-filter: none; -webkit-backdrop-filter: none; }
.vna-card .num { font-size: clamp(2.2rem, 3.2vw, 2.9rem); }
.vna-name { display: flex; flex-wrap: wrap; align-items: center; gap: 0.375rem 0.625rem; }
.vna-name .tiny { white-space: nowrap; }
.std-chips .chip { text-transform: none; letter-spacing: 0.02em; }
.vna-spec { margin: 0; padding: 0; list-style: none; display: grid; gap: 0.3125rem; font-size: 0.8438rem; line-height: 1.45; color: var(--ink-2); }
.vna-spec li { position: relative; padding-left: 0.875rem; }
.vna-spec li::before { content: ""; position: absolute; left: 0; top: 0.65em; width: 0.375rem; height: 1px; background: var(--signal); }
.vna-bar { position: relative; display: block; height: 0.375rem; margin-top: auto; border-radius: 1rem; background: var(--paper-2); overflow: hidden; }
.vna-bar i { position: absolute; inset: 0 auto 0 0; width: var(--to); border-radius: inherit; background: var(--ink); transition: background 0.3s; }
.vna-bar::after { content: ""; position: absolute; top: 0; bottom: 0; left: var(--to); width: calc(var(--ext, var(--to)) - var(--to)); background: repeating-linear-gradient(90deg, var(--signal) 0 0.25rem, transparent 0.25rem 0.4375rem); }
.vna-axis { display: flex; justify-content: space-between; margin-top: -0.5rem; font-family: var(--mono); font-size: 0.625rem; letter-spacing: 0.04em; color: var(--muted); }
.vna-bar ~ .q { margin-top: 0; }
.vna-card:hover .vna-bar i, .vna-card:focus-visible .vna-bar i { background: var(--signal); }
.cat-card.vna-help { --bp-ground: var(--ink); --bp-ink: rgba(255, 255, 255, 0.07); background-color: var(--ink); border-color: var(--ink); color: var(--paper); }
.cat-card.vna-help:hover { --bp-ink: rgba(255, 255, 255, 0.12); }
.vna-help .mono, .vna-help p { color: var(--night-muted); }
.vna-help h3 { font-size: 1.3rem; line-height: 1.2; color: var(--paper); }
.vna-help p { margin: 0; font-size: 0.9rem; }
@media (max-width: 960px) { .std-row { grid-template-columns: 1fr; } }

/* ---------- Large screens: the whole system scales from the root size; containers widen ---------- */
@media (min-width: 1680px) { html { font-size: 17px; } :root { --container: 84rem; } }
@media (min-width: 1920px) { html { font-size: 18px; } :root { --container: 88rem; } }
@media (min-width: 2400px) { html { font-size: 20px; } :root { --container: 92rem; } }
@media (min-width: 3200px) { html { font-size: 24px; } }

/* resources hub: card for the station throughput calculator */
.calc-promo { display: block; margin-bottom: 2rem; padding: clamp(1.375rem, 3vw, 2rem); border-radius: var(--r-lg); background: var(--card); border: 1px solid var(--line); transition: border-color 0.2s; }
.calc-promo h2 { font-size: clamp(1.5rem, 3vw, 2.125rem); margin: 0.5rem 0; letter-spacing: -0.025em; }
.calc-promo p { color: var(--muted); max-width: 60ch; }
.calc-promo:hover { border-color: var(--ink); }

/* 60 s explainer film (calculator page, Wi-Fi page): 16:9 on wide screens, 9:16 on portrait phones */
.explainer { margin: 0; }
.explainer video { display: block; width: 100%; height: auto; border-radius: var(--r-lg); background: var(--paper-2); border: 1px solid var(--line); }
.explainer .explainer-port { display: none; }
@media (max-width: 640px) and (orientation: portrait) {
  .explainer .explainer-land { display: none; }
  .explainer .explainer-port { display: block; max-width: 26rem; margin: 0 auto; }
}
.explainer figcaption { display: flex; flex-wrap: wrap; gap: 0.375rem 1rem; margin-top: 0.875rem; color: var(--muted); font-size: 0.875rem; }
.explainer-head { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; align-items: end; margin: clamp(3rem, 7vw, 5rem) 0 1.5rem; }
.explainer-head h3 { font-size: clamp(1.5rem, 3vw, 2.125rem); letter-spacing: -0.025em; margin: 0; }
.explainer-head p { margin: 0; color: var(--ink-2); }
@media (max-width: 760px) { .explainer-head { grid-template-columns: 1fr; } }