/* Viaform Electronics — homepage concept */
:root {
  --ink: #030404;
  --ink-2: #0a0d0d;
  --ink-3: #131817;
  --line-d: rgba(236, 240, 234, 0.12);
  --line-d2: rgba(236, 240, 234, 0.22);
  --paper: #ecebe5;
  --paper-2: #e2e1d9;
  --card-l: #f5f4ef;
  --line-l: rgba(11, 13, 12, 0.13);
  --line-l2: rgba(11, 13, 12, 0.24);
  --fg-d: #eef0ea;
  --mut-d: #8e958f;
  --fg-l: #0b0d0c;
  --mut-l: #5a605b;
  --signal: #46ffa2;
  --signal-l: #0a8a50;
  --gold: #e2b25a;
  --risk: #ff5a3c;
  --sans: "Instrument Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "Martian Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;
  --ease: cubic-bezier(0.2, 0.7, 0.1, 1);
  --gut: clamp(16px, 4.2vw, 64px);
  --maxw: 1360px;
  --r: 18px;
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }
body {
  margin: 0; background: var(--ink); color: var(--fg-d);
  font-family: var(--sans); font-size: 17px; line-height: 1.55; font-stretch: 100%;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
  overflow-x: clip;
}
img, video, canvas, svg { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
input, select, textarea { font: inherit; color: inherit; }
::selection { background: var(--signal); color: var(--ink); }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: fixed; left: 12px; top: -60px; z-index: 100; background: var(--signal); color: var(--ink); padding: 10px 14px; border-radius: 8px; font-weight: 600; text-decoration: none; }
.skip:focus { top: 12px; }
:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; border-radius: 6px; }
.light :focus-visible { outline-color: var(--signal-l); }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gut); }
.split-line { padding-bottom: 0.06em; margin-bottom: -0.06em; }

/* ------------------------------------------------------------ buttons */
.btn {
  --bg: transparent; --fg: currentColor; --bd: currentColor;
  display: inline-flex; align-items: center; gap: 10px; min-height: 48px; padding: 0 22px;
  border-radius: 999px; border: 1px solid var(--bd); background: var(--bg); color: var(--fg);
  font-size: 15px; font-weight: 560; letter-spacing: -0.005em; text-decoration: none; white-space: nowrap;
  position: relative; overflow: hidden; isolation: isolate;
  transition: color 0.4s var(--ease), border-color 0.4s var(--ease), background-color 0.4s var(--ease);
}
.btn svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; transition: translate 0.4s var(--ease); }
.btn:hover svg { translate: 4px 0; }
.btn::before {
  content: ""; position: absolute; inset: 0; z-index: -1; border-radius: inherit;
  background: var(--fill, var(--fg-d)); transform: translateY(101%); transition: transform 0.5s var(--ease);
}
.btn:hover::before { transform: translateY(0); }
.btn-lg { min-height: 58px; padding: 0 28px; font-size: 16px; }
.btn-sm { min-height: 40px; padding: 0 16px; font-size: 14px; }
.btn-signal { --bg: var(--signal); --fg: #03150c; --bd: var(--signal); --fill: #ffffff; }
.btn-line { --bd: var(--line-d2); --fill: var(--fg-d); }
.btn-line:hover { color: var(--ink); }
.btn-ghost { --bd: transparent; --fill: rgba(236, 240, 234, 0.12); }
.light .btn-line { --bd: var(--line-l2); --fill: var(--fg-l); }
.light .btn-line:hover { color: var(--paper); }

/* ------------------------------------------------------------ nav */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 50; height: 76px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  padding: 0 var(--gut); color: var(--fg-d);
  transition: color 0.4s var(--ease), transform 0.5s var(--ease);
}
.nav::before {
  content: ""; position: absolute; inset: 10px calc(var(--gut) - 14px); z-index: -1; border-radius: 999px;
  background: rgba(8, 10, 10, 0.62); backdrop-filter: blur(16px) saturate(1.3); -webkit-backdrop-filter: blur(16px) saturate(1.3);
  border: 1px solid var(--line-d); opacity: 0; transition: opacity 0.4s var(--ease), background-color 0.4s var(--ease), border-color 0.4s;
}
.nav.is-solid::before { opacity: 1; }
.nav.is-light { color: var(--fg-l); }
.nav.is-light::before { background: rgba(236, 235, 229, 0.72); border-color: var(--line-l); }
.nav.is-hidden { transform: translateY(-110%); }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; }
.brand-mark { width: 26px; height: 26px; fill: none; stroke: var(--signal); stroke-width: 5; }
.brand-mark circle:last-child { fill: var(--signal); stroke: none; }
.nav.is-light .brand-mark, .light .brand-mark { stroke: var(--signal-l); }
.nav.is-light .brand-mark circle:last-child { fill: var(--signal-l); }
.brand-word { font-weight: 640; font-size: 20px; letter-spacing: -0.03em; }
.nav-links { display: flex; gap: 4px; }
.nav-links a { padding: 8px 12px; border-radius: 999px; font-size: 14.5px; text-decoration: none; opacity: 0.82; transition: opacity 0.3s, background-color 0.3s; }
.nav-links a:hover { opacity: 1; background: rgba(128, 128, 128, 0.14); }
.nav-cta { display: flex; align-items: center; gap: 8px; }
.nav.is-light .btn-ghost { --fill: rgba(11, 13, 12, 0.08); }
.burger { display: none; width: 44px; height: 44px; border-radius: 50%; position: relative; }
.burger i { position: absolute; left: 12px; right: 12px; height: 1.6px; background: currentColor; transition: transform 0.4s var(--ease); }
.burger i:first-child { top: 18px; } .burger i:last-child { top: 25px; }
.burger[aria-expanded="true"] i:first-child { transform: translateY(3.5px) rotate(45deg); }
.burger[aria-expanded="true"] i:last-child { transform: translateY(-3.5px) rotate(-45deg); }
.menu {
  position: fixed; inset: 0; z-index: 45; background: var(--ink); color: var(--fg-d);
  display: flex; align-items: flex-end; padding: 100px var(--gut) 48px;
  clip-path: inset(0 0 100% 0); transition: clip-path 0.7s var(--ease); pointer-events: none;
}
.menu.is-open { clip-path: inset(0 0 0 0); pointer-events: auto; }
.menu nav { display: flex; flex-direction: column; gap: 2px; }
.menu a { font-size: clamp(30px, 8vw, 52px); font-weight: 560; letter-spacing: -0.035em; line-height: 1.12; text-decoration: none; }
.nav.menu-open { color: var(--fg-d); }
.nav.menu-open::before { opacity: 0; }

/* pinout (section index) */
.pinout {
  position: fixed; right: 18px; top: 50%; z-index: 40; list-style: none; margin: 0; padding: 0;
  display: flex; flex-direction: column; gap: 14px; translate: 0 -50%;
  opacity: 0; transition: opacity 0.5s var(--ease);
}
.pinout.is-on { opacity: 1; }
.pinout li { position: relative; width: 9px; height: 9px; border-radius: 50%; border: 1.5px solid var(--mut-d); cursor: pointer; transition: background-color 0.3s, border-color 0.3s, scale 0.3s var(--ease); }
.pinout li::after { content: ""; position: absolute; left: 50%; top: 100%; width: 1.5px; height: 14px; background: var(--line-d2); translate: -50% 0; }
.pinout li:last-child::after { display: none; }
.pinout li span {
  position: absolute; right: 20px; top: 50%; translate: 6px -50%; white-space: nowrap; pointer-events: none;
  font: 500 semi-condensed 10.5px/1 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; opacity: 0; transition: opacity 0.3s, translate 0.3s var(--ease);
}
.pinout:hover li span { opacity: 0.55; translate: 0 -50%; }
.pinout:hover li:hover span, .pinout:hover li.is-active span { opacity: 1; }
.pinout li.is-active { background: var(--signal); border-color: var(--signal); scale: 1.25; }
.pinout.is-light li { border-color: var(--mut-l); }
.pinout.is-light li::after { background: var(--line-l2); }
.pinout.is-light li.is-active { background: var(--signal-l); border-color: var(--signal-l); }
.pinout.is-light li span { color: var(--fg-l); }

/* ------------------------------------------------------------ 1. story / film */
.story { position: relative; background: #020303; }
.story-pin { position: relative; height: 100vh; height: 100svh; overflow: hidden; }
.film { position: absolute; inset: 0; background: #020303; --lift: 0vh; --shrink: 1; }
.film-poster, .film-video, .film-fx, .film-marks { translate: 0 var(--lift); scale: var(--shrink); }
.film-poster, .film-video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 72% 50%; }
.film-video { opacity: 0; transition: opacity 0.6s linear; }
.film.is-ready .film-video { opacity: 1; }
.film-poster { transition: opacity 0.6s linear; }
.film.is-ready .film-poster { opacity: 0; }
.film-fx { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.film-marks { position: absolute; inset: 0; pointer-events: none; }
.film-shade {
  position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(90deg, rgba(2, 3, 3, 0.92) 0%, rgba(2, 3, 3, 0.72) 26%, rgba(2, 3, 3, 0) 52%),
              linear-gradient(0deg, rgba(2, 3, 3, 0.9) 0%, rgba(2, 3, 3, 0) 22%);
}
.hero {
  position: absolute; inset: 0 auto 0 0; z-index: 3; width: min(940px, 58vw);
  display: flex; flex-direction: column; justify-content: center; padding: 96px var(--gut) min(120px, 12vh);
}
.eyebrow { display: inline-flex; align-items: center; gap: 10px; margin: 0 0 22px; font: 500 semi-condensed 11.5px/1.4 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--mut-d); }
.eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--signal); box-shadow: 0 0 0 4px rgba(70, 255, 162, 0.15); animation: blink 2.4s ease-in-out infinite; }
@keyframes blink { 50% { box-shadow: 0 0 0 9px rgba(70, 255, 162, 0); } }
.hero-title { margin: 0; font-size: clamp(42px, min(6.6vw, 11.2vh), 106px); font-weight: 560; line-height: 0.94; letter-spacing: -0.045em; font-stretch: 92%; text-wrap: balance; }
.hero-sub { margin: min(26px, 2.6vh) 0 0; max-width: 34ch; font-size: clamp(17px, 1.35vw, 20px); line-height: 1.5; color: #c9cec8; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 12px; margin-top: min(34px, 3.6vh); }
.hero-proof { display: flex; flex-wrap: wrap; gap: 6px 18px; list-style: none; margin: min(34px, 3.4vh) 0 0; padding: 0; font: 500 semi-condensed 11px/1.4 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--mut-d); }
.hero-proof li { display: inline-flex; align-items: center; gap: 8px; }
.hero-proof li::before { content: ""; width: 5px; height: 5px; border: 1px solid var(--gold); border-radius: 50%; }

.caps { position: absolute; z-index: 3; left: var(--gut); bottom: 150px; width: min(470px, 40vw); pointer-events: none; }
.cap { position: absolute; left: 0; bottom: 0; width: 100%; visibility: hidden; opacity: 0; }
.cap-num { margin: 0 0 16px; font: 500 semi-condensed 11.5px/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--mut-d); }
.cap-num b { color: var(--signal); font-weight: 600; }
.cap h2 { margin: 0; font-size: clamp(32px, min(3.9vw, 6.6vh), 60px); font-weight: 560; line-height: 0.98; letter-spacing: -0.04em; font-stretch: 94%; }
.cap p { margin: 18px 0 0; max-width: 40ch; color: #c3c9c2; font-size: 17px; }
.cap .cap-tag { display: inline-flex; margin-top: 22px; padding: 8px 13px; line-height: 1.35 !important; white-space: nowrap; border: 1px solid var(--line-d2); border-radius: 999px; font: 500 semi-condensed 10.5px/1 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--fg-d); }
.cap-link { pointer-events: auto; display: inline-flex; align-items: center; gap: 8px; margin-top: 22px; color: var(--signal); font-weight: 560; text-decoration: none; border-bottom: 1px solid rgba(70, 255, 162, 0.4); padding-bottom: 3px; }
.cap-link svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 1.8; }

.rail {
  position: absolute; z-index: 4; left: var(--gut); bottom: 44px; width: min(560px, 44vw);
  display: grid; grid-template-columns: repeat(8, 1fr); list-style: none; margin: 0; padding: 14px 0 0;
  opacity: 0;
}
.rail::before { content: ""; position: absolute; left: 0; right: 0; top: 0; height: 1px; background: var(--line-d2); }
.rail-fill { position: absolute; left: 0; right: 0; top: 0; height: 1px; background: var(--signal); transform-origin: 0 50%; transform: scaleX(0); box-shadow: 0 0 12px var(--signal); }
.rail li { position: relative; }
.rail li::before { content: ""; position: absolute; left: 0; top: -18px; width: 7px; height: 7px; border-radius: 50%; background: var(--ink); border: 1.5px solid var(--mut-d); transition: background-color 0.3s, border-color 0.3s; }
.rail li.is-done::before, .rail li.is-active::before { background: var(--signal); border-color: var(--signal); }
.rail button { font: 500 condensed 10px/1 var(--mono); letter-spacing: 0.03em; text-transform: uppercase; color: var(--mut-d); padding: 6px 0; transition: color 0.3s; }
.rail li.is-active button, .rail button:hover { color: var(--fg-d); }
.readout { position: absolute; z-index: 4; right: calc(var(--gut) + 26px); bottom: 44px; display: flex; gap: 18px; font: 500 semi-condensed 10.5px/1 var(--mono); letter-spacing: 0.08em; color: var(--mut-d); opacity: 0; }
.cue { position: absolute; z-index: 4; left: 50%; bottom: 34px; margin-left: -150px; width: 300px; white-space: nowrap; display: flex; flex-direction: column; align-items: center; gap: 12px; font: 500 semi-condensed 10.5px/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--mut-d); }
.cue-line { position: relative; width: 1px; height: 44px; background: var(--line-d); overflow: hidden; }
.cue-line i { position: absolute; left: 0; top: 0; width: 1px; height: 16px; background: var(--signal); animation: drip 1.8s var(--ease) infinite; }
@keyframes drip { from { transform: translateY(-16px); } to { transform: translateY(48px); } }

/* film marks (DFM findings, test result) */
.mk { position: absolute; left: 0; top: 0; opacity: 0; will-change: transform, opacity; }
.mk-ring { position: absolute; left: -15px; top: -15px; width: 30px; height: 30px; border-radius: 50%; border: 1.5px solid var(--risk); box-shadow: 0 0 20px rgba(255, 90, 60, 0.45); transition: border-color 0.4s, box-shadow 0.4s; }
.mk-ring::after { content: ""; position: absolute; inset: -9px; border-radius: 50%; border: 1px solid currentColor; color: var(--risk); opacity: 0.5; animation: ping 1.8s var(--ease) infinite; }
@keyframes ping { from { transform: scale(0.6); opacity: 0.8; } to { transform: scale(1.6); opacity: 0; } }
.mk-label { position: absolute; left: 24px; top: -30px; white-space: nowrap; padding: 7px 10px 7px 9px; border-radius: 8px; background: rgba(10, 13, 13, 0.82); border: 1px solid var(--line-d2); backdrop-filter: blur(8px); font: 500 semi-condensed 10.5px/1.35 var(--mono); letter-spacing: 0.02em; color: var(--fg-d); }
.mk-label b { display: block; color: var(--risk); font-weight: 600; margin-bottom: 2px; transition: color 0.4s; }
.mk-line { position: absolute; left: 14px; top: -14px; width: 12px; height: 1px; background: var(--line-d2); transform: rotate(-45deg); transform-origin: 0 0; }
.mk.is-left .mk-label { left: auto; right: 24px; }
.mk.is-left .mk-line { left: auto; right: 14px; transform: rotate(45deg); transform-origin: 100% 0; }
.mk.is-fixed .mk-ring { border-color: var(--signal); box-shadow: 0 0 20px rgba(70, 255, 162, 0.45); }
.mk.is-fixed .mk-ring::after { color: var(--signal); animation: none; opacity: 0; }
.mk.is-fixed .mk-label b { color: var(--signal); }
.mk-test .mk-ring { border-color: var(--signal); box-shadow: 0 0 20px rgba(70, 255, 162, 0.45); }
.mk-test .mk-ring::after { color: var(--signal); }
.mk-test .mk-label b { color: var(--signal); }

/* ------------------------------------------------------------ sections */
.section { position: relative; padding: clamp(96px, 13vw, 190px) 0; }
.light { background: var(--paper); color: var(--fg-l); }
.dark { background: var(--ink); color: var(--fg-d); }
.sec-head { max-width: 900px; margin-bottom: clamp(48px, 6vw, 90px); }
.sec-label { display: flex; align-items: center; gap: 12px; margin: 0 0 22px; font: 500 semi-condensed 11.5px/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--mut-d); }
.light .sec-label { color: var(--mut-l); }
.sec-label span { display: inline-grid; place-items: center; min-width: 30px; height: 22px; padding: 0 7px; border-radius: 999px; border: 1px solid currentColor; }
.sec-title { margin: 0; font-size: clamp(36px, 5.2vw, 78px); font-weight: 560; line-height: 0.98; letter-spacing: -0.042em; font-stretch: 93%; text-wrap: balance; }
.sec-sub { margin: 22px 0 0; max-width: 46ch; font-size: clamp(17px, 1.3vw, 20px); color: var(--mut-d); }
.light .sec-sub { color: var(--mut-l); }
.sec-sub a { color: inherit; text-underline-offset: 4px; }

/* ------------------------------------------------------------ 2. services */
.phases { position: relative; display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(20px, 3vw, 44px); padding-top: 34px; }
.phase-trace { position: absolute; left: 0; right: 0; top: -6px; width: 100%; height: 40px; fill: none; stroke: var(--signal-l); stroke-width: 1.6; overflow: visible; }
.phase-trace path { stroke-dasharray: 1; stroke-dashoffset: 1; }
.phase > header { position: relative; display: flex; align-items: baseline; gap: 12px; padding-bottom: 20px; }
.ph-dot { position: absolute; left: 0; top: -40px; width: 13px; height: 13px; border-radius: 50%; background: var(--paper); border: 2px solid var(--signal-l); }
.phase h3 { margin: 0; font-size: clamp(24px, 2.2vw, 32px); font-weight: 580; letter-spacing: -0.03em; }
.phase header p { margin: 0; font: 500 semi-condensed 11px/1 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--mut-l); }
.svc-list { list-style: none; margin: 0; padding: 0; }
.svc {
  position: relative; display: grid; grid-template-columns: 44px 1fr; gap: 18px; padding: 24px 12px 24px 0;
  border-top: 1px solid var(--line-l); transition: padding-left 0.5s var(--ease);
}
.svc::before { content: ""; position: absolute; inset: 0 -12px; z-index: 0; border-radius: 14px; background: var(--card-l); opacity: 0; transition: opacity 0.4s var(--ease); }
.svc > * { position: relative; }
.svc:hover { padding-left: 12px; }
.svc:hover::before { opacity: 1; }
.svc svg { width: 44px; height: 44px; fill: none; stroke: var(--fg-l); stroke-width: 1.4; stroke-linecap: round; stroke-linejoin: round; transition: stroke 0.4s; }
.svc:hover svg { stroke: var(--signal-l); }
.svc h4 { margin: 0; font-size: 20px; font-weight: 600; letter-spacing: -0.02em; line-height: 1.2; }
.svc p { margin: 6px 0 0; color: var(--mut-l); font-size: 15.5px; line-height: 1.5; }
.svc-meta { display: inline-block; margin-top: 10px; font: 500 semi-condensed 10.5px/1 var(--mono); letter-spacing: 0.05em; text-transform: uppercase; color: var(--signal-l); }
.not-offered { margin-top: 26px; padding: 22px 22px 20px; border: 1.5px dashed var(--line-l2); border-radius: var(--r); }
.not-offered h4 { margin: 0 0 12px; font: 600 semi-condensed 11px/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--mut-l); }
.not-offered p { position: relative; margin: 10px 0 0; padding-left: 26px; font-size: 15px; color: var(--mut-l); line-height: 1.5; }
.not-offered p b { color: var(--fg-l); font-weight: 600; }
.not-offered p::before { content: ""; position: absolute; left: 2px; top: 5px; width: 14px; height: 14px; border-radius: 50%; border: 1.5px solid var(--mut-l);
  background: linear-gradient(45deg, transparent 45%, var(--mut-l) 45% 55%, transparent 55%), linear-gradient(-45deg, transparent 45%, var(--mut-l) 45% 55%, transparent 55%); background-size: 8px 8px; background-position: center; background-repeat: no-repeat; }

/* ------------------------------------------------------------ 3. volume */
.volume { overflow: hidden; }
.vol-grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: clamp(32px, 5vw, 90px); align-items: center; }
.vol-read { margin-top: 44px; }
.vol-num { display: flex; align-items: baseline; gap: 14px; margin: 0 0 18px; }
.vol-num output { font-size: clamp(52px, 6.4vw, 96px); font-weight: 560; letter-spacing: -0.05em; line-height: 1; font-variant-numeric: tabular-nums; font-stretch: 90%; }
.vol-num span { color: var(--mut-d); font-size: 17px; }
.vol-slider { position: relative; display: block; padding-bottom: 30px; }
.vol-slider input { -webkit-appearance: none; appearance: none; width: 100%; height: 36px; background: transparent; cursor: grab; margin: 0; }
.vol-slider input:active { cursor: grabbing; }
.vol-slider input::-webkit-slider-runnable-track { height: 2px; background: linear-gradient(90deg, var(--signal) var(--pct, 50%), var(--line-d2) var(--pct, 50%)); border-radius: 2px; }
.vol-slider input::-moz-range-track { height: 2px; background: var(--line-d2); }
.vol-slider input::-moz-range-progress { height: 2px; background: var(--signal); }
.vol-slider input::-webkit-slider-thumb { -webkit-appearance: none; width: 28px; height: 28px; margin-top: -13px; border-radius: 50%; background: var(--ink); border: 2px solid var(--signal); box-shadow: 0 0 0 6px rgba(70, 255, 162, 0.12), 0 0 24px rgba(70, 255, 162, 0.4); transition: box-shadow 0.3s; }
.vol-slider input::-moz-range-thumb { width: 24px; height: 24px; border-radius: 50%; background: var(--ink); border: 2px solid var(--signal); }
.vol-slider input:hover::-webkit-slider-thumb { box-shadow: 0 0 0 10px rgba(70, 255, 162, 0.14), 0 0 30px rgba(70, 255, 162, 0.5); }
.vol-ticks { position: absolute; left: 14px; right: 14px; bottom: 0; height: 20px; font: 500 semi-condensed 10.5px/1 var(--mono); color: var(--mut-d); }
.vol-ticks i { position: absolute; font-style: normal; translate: -50% 0; }
.vol-ticks i::before { content: ""; position: absolute; left: 50%; top: -14px; width: 1px; height: 6px; background: var(--line-d2); }
.tier { margin-top: 34px; padding: 26px 26px 22px; border-radius: var(--r); background: var(--ink-2); border: 1px solid var(--line-d); }
.tier-name { margin: 0 0 18px; font-size: 24px; font-weight: 600; letter-spacing: -0.025em; }
.tier-name::before { content: ""; display: inline-block; width: 9px; height: 9px; margin-right: 12px; border-radius: 50%; background: var(--signal); box-shadow: 0 0 14px var(--signal); vertical-align: 0.12em; }
.tier dl { display: grid; gap: 12px; margin: 0; }
.tier dl div { display: grid; grid-template-columns: 110px 1fr; gap: 12px; padding-top: 12px; border-top: 1px solid var(--line-d); }
.tier dt { font: 500 semi-condensed 10.5px/1.7 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--mut-d); }
.tier dd { margin: 0; font-size: 16px; }
.vol-vis { position: relative; aspect-ratio: 1; width: 100%; max-width: 680px; justify-self: center; }
.vol-vis canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.vol-key { position: absolute; right: 0; bottom: -6px; margin: 0; font: 500 semi-condensed 10.5px/1 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--mut-d); }

/* ------------------------------------------------------------ 4. problems */
.prob { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: clamp(32px, 5vw, 96px); align-items: center; padding: clamp(40px, 5vw, 70px) 0; border-top: 1px solid var(--line-l); }
.prob-q { margin: 0 0 22px; font-size: clamp(22px, 2vw, 28px); font-weight: 500; letter-spacing: -0.02em; line-height: 1.25; font-style: italic; color: var(--mut-l); }
.prob-q span { display: block; margin-bottom: 12px; font: 600 semi-condensed 10.5px/1 var(--mono); font-style: normal; letter-spacing: 0.08em; text-transform: uppercase; color: var(--risk); }
.prob h3 { margin: 0; font-size: clamp(28px, 2.9vw, 44px); font-weight: 580; letter-spacing: -0.035em; line-height: 1.02; }
.prob-copy > p:last-child { margin: 18px 0 0; color: var(--mut-l); max-width: 44ch; }
.prob-vis { position: relative; background: var(--card-l); border: 1px solid var(--line-l); border-radius: 22px; padding: clamp(22px, 2.6vw, 36px); box-shadow: 0 30px 60px -40px rgba(11, 13, 12, 0.35); }
/* ladder */
.ladder ol { list-style: none; margin: 0; padding: 0; counter-reset: s; }
.ladder li { position: relative; display: grid; grid-template-columns: 34px 1fr; column-gap: 16px; padding: 12px 0; counter-increment: s; }
.ladder li::before { content: counter(s); grid-row: span 2; width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; border: 1.5px solid var(--line-l2); font: 600 semi-condensed 11px/1 var(--mono); color: var(--mut-l); transition: background-color 0.4s, border-color 0.4s, color 0.4s; }
.ladder li::after { content: ""; position: absolute; left: 15px; top: 44px; bottom: -12px; width: 1.5px; background: var(--line-l); }
.ladder li:last-child::after { display: none; }
.ladder li b { font-weight: 600; font-size: 17px; line-height: 1.3; }
.ladder li span { color: var(--mut-l); font-size: 14.5px; }
.ladder li.is-on::before { background: var(--signal-l); border-color: var(--signal-l); color: #fff; content: "✓"; }
.yield { display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 10px; margin-top: 18px; padding-top: 18px; border-top: 1px solid var(--line-l); }
.yield span { font: 500 semi-condensed 10.5px/1 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--mut-l); }
.yield output { font-size: 34px; font-weight: 600; letter-spacing: -0.04em; line-height: 1; font-variant-numeric: tabular-nums; }
.yield-bar { grid-column: 1 / -1; height: 6px; border-radius: 6px; background: var(--paper-2); overflow: hidden; }
.yield-bar i { display: block; height: 100%; width: 72%; border-radius: 6px; background: linear-gradient(90deg, var(--risk), #f5b53d 60%, var(--signal-l)); background-size: 140% 100%; }
/* bom */
.bom { font-size: 14px; }
.bom-head, .bom-row { display: grid; grid-template-columns: 44px 1fr 74px 60px; gap: 10px; align-items: center; padding: 11px 12px; }
.bom-head { font: 500 semi-condensed 10px/1 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--mut-l); }
.bom-row { border-top: 1px solid var(--line-l); font-variant-numeric: tabular-nums; }
.bom-row span:first-child { font: 600 semi-condensed 12px/1 var(--mono); }
.bom-row span:nth-child(3), .bom-row span:nth-child(4) { font-family: var(--mono); font-size: 12px; text-align: right; }
.bom-row.is-risk { border-radius: 10px; background: rgba(255, 90, 60, 0.1); box-shadow: inset 0 0 0 1px rgba(255, 90, 60, 0.4); color: #b02a12; }
.bom-row.is-ok { border-radius: 10px; background: rgba(10, 138, 80, 0.1); box-shadow: inset 0 0 0 1px rgba(10, 138, 80, 0.38); color: #06683a; }
.bom-row { transition: background-color 0.5s, box-shadow 0.5s, color 0.5s; }
.bom-alts { display: grid; gap: 8px; margin: 12px 0 0 56px; }
.alt { margin: 0; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--line-l); background: #fff; font-size: 13.5px; display: flex; gap: 10px; align-items: baseline; opacity: 0; }
.alt b { font: 600 semi-condensed 11px/1 var(--mono); }
.alt em { margin-left: auto; font: normal 500 semi-condensed 11px/1 var(--mono); color: var(--signal-l); }
.alt.is-pick { border-color: var(--signal-l); box-shadow: 0 0 0 3px rgba(10, 138, 80, 0.12); }
.bom-sign { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 0 56px; }
.sig { display: inline-flex; align-items: center; gap: 8px; padding: 8px 12px; border-radius: 999px; background: var(--paper-2); font: 500 semi-condensed 11px/1 var(--mono); letter-spacing: 0.03em; opacity: 0; }
.sig i { font-style: normal; display: inline-grid; place-items: center; width: 16px; height: 16px; border-radius: 50%; background: var(--signal-l); color: #fff; font-size: 10px; }
.replay { position: absolute; right: 18px; top: 16px; font: 500 semi-condensed 10.5px/1 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--mut-l); padding: 6px 10px; border-radius: 999px; border: 1px solid var(--line-l); opacity: 0; transition: opacity 0.4s; }
.replay.is-on { opacity: 1; }
/* trace */
.trace-form label { display: block; margin-bottom: 10px; font: 500 semi-condensed 10.5px/1 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--mut-l); }
.trace-input { display: flex; gap: 8px; padding: 6px; border-radius: 14px; background: #fff; border: 1px solid var(--line-l2); }
.trace-input input { flex: 1; min-width: 0; border: 0; background: transparent; padding: 8px 10px; font: 500 semi-condensed 15px/1 var(--mono); letter-spacing: 0.02em; outline: none; }
.trace-input button { padding: 0 18px; border-radius: 10px; background: var(--fg-l); color: var(--paper); font-weight: 560; font-size: 14px; }
.trace-list { list-style: none; margin: 18px 0 0; padding: 0; display: grid; gap: 0; }
.trace-list li { display: grid; grid-template-columns: 18px 1fr auto; gap: 12px; align-items: center; padding: 9px 0; border-bottom: 1px dashed var(--line-l); font-size: 14.5px; opacity: 0; }
.trace-list li::before { content: ""; width: 10px; height: 10px; border-radius: 50%; background: var(--signal-l); box-shadow: 0 0 0 4px rgba(10, 138, 80, 0.14); }
.trace-list time { font: 500 semi-condensed 11px/1 var(--mono); color: var(--mut-l); }
.trace-list b { font-weight: 600; }
.trace-list small { color: var(--mut-l); font-size: 13px; }
.trace-eco { margin: 16px 0 0; padding: 12px 14px; border-radius: 12px; background: var(--paper-2); font-size: 14px; opacity: 0; }
.trace-eco b { display: block; font: 600 semi-condensed 10.5px/1.6 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--signal-l); }

/* ------------------------------------------------------------ 5. capabilities / x-ray */
.xr-grid { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: clamp(32px, 5vw, 80px); align-items: start; }
.xr { position: relative; aspect-ratio: 1; border-radius: 50%; touch-action: none; user-select: none; -webkit-user-select: none; cursor: none; }
.xr-board { width: 100%; height: 100%; object-fit: cover; border-radius: 50%; }
.xr-lens {
  --s: 34%; position: absolute; left: 0; top: 0; width: var(--s); aspect-ratio: 1; border-radius: 50%; overflow: hidden; pointer-events: none;
  box-shadow: 0 0 0 1.5px rgba(255, 255, 255, 0.85), 0 0 0 7px rgba(70, 255, 162, 0.16), 0 30px 60px rgba(0, 0, 0, 0.6);
  will-change: transform; clip-path: circle(50%);
}
.xr-lens-img { position: absolute; inset: 0; background-image: url("assets/img/board-xray.jpg"); background-repeat: no-repeat; }
.xr-lens-tag { position: absolute; left: 50%; bottom: 12%; translate: -50% 0; padding: 5px 8px; border-radius: 6px; background: rgba(3, 4, 4, 0.7); font: 600 semi-condensed 9.5px/1 var(--mono); letter-spacing: 0.08em; color: #fff; }
.xr.is-full .xr-lens { transition: none; }
.xr-full { position: absolute; inset: 0; border-radius: 50%; background: url("assets/img/board-xray.jpg") center / cover; clip-path: circle(0% at var(--cx, 50%) var(--cy, 50%)); pointer-events: none; }
.xr-spots { position: absolute; inset: 0; pointer-events: none; }
.xr-spot { position: absolute; width: 26px; height: 26px; margin: -13px 0 0 -13px; border-radius: 50%; display: grid; place-items: center; background: rgba(3, 4, 4, 0.75); border: 1.5px solid var(--signal); font: 600 semi-condensed 10.5px/1 var(--mono); color: var(--signal); pointer-events: auto; cursor: pointer; transition: scale 0.3s var(--ease), background-color 0.3s; }
.xr-spot::after { content: ""; position: absolute; inset: -6px; border-radius: 50%; border: 1px solid var(--signal); opacity: 0; animation: ping 2.4s var(--ease) infinite; animation-delay: var(--d, 0s); }
.xr-spot.is-active { background: var(--signal); color: var(--ink); scale: 1.15; }
.xr-toggle { position: absolute; right: 2%; bottom: 4%; padding: 10px 16px; border-radius: 999px; background: rgba(10, 13, 13, 0.8); border: 1px solid var(--line-d2); font: 500 semi-condensed 11px/1 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; backdrop-filter: blur(8px); cursor: pointer; }
.xr-toggle[aria-pressed="true"] { background: var(--signal); color: var(--ink); border-color: var(--signal); }
.xr-list { list-style: none; margin: 0; padding: 0; counter-reset: x; }
.xr-list li { position: relative; display: grid; grid-template-columns: 34px 1fr; column-gap: 14px; padding: 16px 12px 16px 0; border-top: 1px solid var(--line-d); counter-increment: x; cursor: pointer; transition: padding-left 0.4s var(--ease), background-color 0.3s; border-radius: 0; }
.xr-list li::before { content: counter(x); grid-row: span 2; width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; border: 1.5px solid var(--line-d2); font: 600 semi-condensed 10.5px/1 var(--mono); color: var(--mut-d); transition: all 0.3s; }
.xr-list li.is-active { padding-left: 10px; }
.xr-list li.is-active::before { border-color: var(--signal); background: var(--signal); color: var(--ink); }
.xr-list b { font-weight: 600; font-size: 17px; }
.xr-list span { color: var(--mut-d); font-size: 14.5px; line-height: 1.45; }
.spec { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 34px; padding: 24px; border-radius: var(--r); background: var(--ink-2); border: 1px solid var(--line-d); }
.spec h3 { margin: 0 0 12px; font: 600 semi-condensed 10.5px/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--gold); }
.spec ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; font-size: 14.5px; color: var(--mut-d); }
.spec b { color: var(--fg-d); font-weight: 560; }

/* ------------------------------------------------------------ 6. locations */
.floor { position: relative; margin: 0 0 clamp(28px, 3vw, 44px); border-radius: 24px; overflow: hidden; aspect-ratio: 21 / 8; background: var(--paper-2); }
.floor img { position: absolute; left: 0; top: -12%; width: 100%; height: 124%; object-fit: cover; }
.floor figcaption { position: absolute; left: 18px; bottom: 16px; padding: 7px 11px; border-radius: 999px; background: rgba(236, 235, 229, 0.85); backdrop-filter: blur(8px); font: 500 semi-condensed 10.5px/1 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--fg-l); }
.sites { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.site-img { position: relative; margin: -12px -12px 22px; aspect-ratio: 16 / 10; border-radius: 14px; overflow: hidden; background: var(--paper-2); }
.site-img img { width: 100%; height: 100%; object-fit: cover; transition: scale 1.2s var(--ease); }
.site:hover .site-img img { scale: 1.06; }
.site-img figcaption { position: absolute; left: 10px; bottom: 10px; padding: 6px 9px; border-radius: 999px; background: rgba(236, 235, 229, 0.86); backdrop-filter: blur(6px); font: 500 semi-condensed 10px/1 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--fg-l); }
.site { padding: 26px; border-radius: 22px; background: var(--card-l); border: 1px solid var(--line-l); transition: transform 0.5s var(--ease), box-shadow 0.5s var(--ease); }
.site:hover { transform: translateY(-4px); box-shadow: 0 30px 50px -36px rgba(11, 13, 12, 0.4); }
.site h3 { margin: 0; font-size: 28px; font-weight: 600; letter-spacing: -0.035em; }
.site header p { margin: 4px 0 0; color: var(--mut-l); font-size: 14.5px; }
.site-clock { display: flex; align-items: center; gap: 12px; margin: 22px 0 0; }
.site-clock time { font: 500 semi-condensed 30px/1 var(--mono); letter-spacing: -0.03em; font-variant-numeric: tabular-nums; }
.site-state { display: inline-flex; align-items: center; gap: 7px; font: 500 semi-condensed 10.5px/1.3 var(--mono); letter-spacing: 0.03em; color: var(--signal-l); }
.site-state::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; animation: blink2 1.6s ease-in-out infinite; }
.site-state.is-off { color: var(--mut-l); }
.site-state.is-off::before { animation: none; }
@keyframes blink2 { 50% { opacity: 0.3; } }
.site-role { margin: 14px 0 0; font-size: 16px; line-height: 1.45; }
.site dl { margin: 18px 0 0; display: grid; gap: 0; }
.site dl div { display: flex; justify-content: space-between; gap: 12px; padding: 9px 0; border-top: 1px solid var(--line-l); font-size: 14px; }
.site dt { color: var(--mut-l); }
.site dd { margin: 0; text-align: right; font-weight: 520; }
.creds { margin-top: clamp(48px, 6vw, 80px); }
.creds h3 { margin: 0 0 18px; font: 600 semi-condensed 11px/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--mut-l); }
.creds ul { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line-l); border-left: 1px solid var(--line-l); }
.creds li { position: relative; display: flex; flex-direction: column; gap: 6px; padding: 22px 20px; border-right: 1px solid var(--line-l); border-bottom: 1px solid var(--line-l); overflow: hidden; }
.creds li::before { content: ""; position: absolute; right: 16px; top: 18px; width: 22px; height: 22px; border-radius: 50%; border: 1.5px solid var(--signal-l); background: radial-gradient(circle, var(--signal-l) 0 3px, transparent 3.5px); opacity: 0.8; }
.creds b { font-size: 19px; font-weight: 600; letter-spacing: -0.02em; }
.creds span { color: var(--mut-l); font-size: 14px; }

/* ------------------------------------------------------------ 7. work */
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin: -30px 0 34px; }
.chip { padding: 10px 16px; border-radius: 999px; border: 1px solid var(--line-d2); font-size: 14.5px; transition: background-color 0.3s, color 0.3s, border-color 0.3s; }
.chip:hover { border-color: var(--fg-d); }
.chip.is-on { background: var(--fg-d); color: var(--ink); border-color: var(--fg-d); }
.products { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.prod { position: relative; border-radius: 22px; overflow: hidden; background: var(--ink-2); border: 1px solid var(--line-d); display: flex; flex-direction: column; }
.prod.is-out { display: none; }
.prod-img { aspect-ratio: 3 / 2; overflow: hidden; background: #0c0e0e; }
.prod-img img { width: 100%; height: 100%; object-fit: cover; transition: scale 1.2s var(--ease); }
.prod:hover .prod-img img { scale: 1.06; }
.prod-body { padding: 22px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.prod-ind { margin: 0; font: 500 semi-condensed 10.5px/1 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--gold); }
.prod h3 { margin: 10px 0 0; font-size: 24px; font-weight: 600; letter-spacing: -0.03em; line-height: 1.1; }
.prod ul { list-style: none; margin: 14px 0 0; padding: 0; display: grid; gap: 6px; color: var(--mut-d); font-size: 14.5px; }
.prod li { padding-left: 18px; position: relative; }
.prod li::before { content: ""; position: absolute; left: 0; top: 0.6em; width: 8px; height: 1.5px; background: var(--signal); }
.prod-vol { margin: auto 0 0; padding-top: 18px; font: 600 semi-condensed 12px/1 var(--mono); letter-spacing: 0.02em; color: var(--fg-d); }
.prod-vol::before { content: "Volume  "; color: var(--mut-d); font-weight: 500; }

/* ------------------------------------------------------------ 8. faq */
.faq-grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(32px, 5vw, 90px); align-items: start; }
.faq .sec-head { position: sticky; top: 120px; margin: 0; }
.qa details { border-top: 1px solid var(--line-l); }
.qa details:last-child { border-bottom: 1px solid var(--line-l); }
.qa summary { list-style: none; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 26px 0; cursor: pointer; font-size: clamp(21px, 1.9vw, 27px); font-weight: 560; letter-spacing: -0.025em; line-height: 1.2; }
.qa summary::-webkit-details-marker { display: none; }
.qa summary i { position: relative; flex: none; width: 38px; height: 38px; border-radius: 50%; border: 1px solid var(--line-l2); transition: background-color 0.4s, border-color 0.4s, rotate 0.5s var(--ease); }
.qa summary i::before, .qa summary i::after { content: ""; position: absolute; left: 50%; top: 50%; width: 13px; height: 1.6px; margin: -0.8px 0 0 -6.5px; background: currentColor; transition: rotate 0.5s var(--ease); }
.qa summary i::after { rotate: 90deg; }
.qa details[open] summary i { background: var(--fg-l); color: var(--paper); border-color: var(--fg-l); rotate: 180deg; }
.qa details[open] summary i::after { rotate: 0deg; }
.qa summary:hover i { border-color: var(--fg-l); }
.qa-body { overflow: hidden; }
.qa-body > * { margin: 0; }
.qa-body > p { padding: 0 60px 28px 0; color: var(--mut-l); font-size: 17px; }
.qa-body a { color: var(--fg-l); text-underline-offset: 4px; }
.files { list-style: none; padding: 0 0 18px; display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.files li { display: flex; flex-direction: column; gap: 2px; padding: 14px 14px 14px 46px; border-radius: 14px; background: var(--card-l); border: 1px solid var(--line-l); position: relative; }
.files li::before { content: ""; position: absolute; left: 14px; top: 16px; width: 18px; height: 22px; border-radius: 3px; border: 1.5px solid var(--fg-l); background: linear-gradient(var(--fg-l), var(--fg-l)) 4px 8px / 8px 1.5px no-repeat, linear-gradient(var(--fg-l), var(--fg-l)) 4px 12px / 6px 1.5px no-repeat; }
.files b { font-weight: 600; font-size: 15.5px; }
.files span { color: var(--mut-l); font-size: 13.5px; }

/* ------------------------------------------------------------ 9. quote */
.quote-grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(32px, 5vw, 90px); align-items: start; }
.quote-copy { position: sticky; top: 120px; }
.quote-points { list-style: none; margin: 34px 0 0; padding: 0; display: grid; gap: 12px; }
.quote-points li { display: flex; gap: 12px; align-items: center; font-size: 16px; }
.quote-points li::before { content: "✓"; display: grid; place-items: center; width: 22px; height: 22px; border-radius: 50%; background: rgba(70, 255, 162, 0.14); color: var(--signal); font-size: 12px; flex: none; }
.qform { position: relative; padding: clamp(20px, 2.6vw, 36px); border-radius: 26px; background: var(--ink-2); border: 1px solid var(--line-d); }
.qtabs { position: relative; display: grid; grid-template-columns: 1fr 1fr; padding: 5px; border-radius: 16px; background: var(--ink); border: 1px solid var(--line-d); margin-bottom: 28px; }
.qtabs button { position: relative; z-index: 1; padding: 13px 10px; border-radius: 12px; font-size: 14.5px; font-weight: 560; line-height: 1.25; color: var(--mut-d); transition: color 0.4s; }
.qtabs button[aria-selected="true"] { color: var(--ink); }
.qtab-ink { position: absolute; z-index: 0; top: 5px; bottom: 5px; left: 5px; width: calc(50% - 5px); border-radius: 12px; background: var(--signal); transition: transform 0.55s var(--ease); }
.qtabs.is-review .qtab-ink { transform: translateX(100%); }
.q { border: 0; margin: 0 0 24px; padding: 0; min-width: 0; }
.q legend, .q .legend, .field > span { display: flex; align-items: center; gap: 10px; margin: 0 0 12px; padding: 0; font-size: 15px; font-weight: 560; }
.q legend i, .legend i, .field > span i { display: inline-grid; place-items: center; width: 22px; height: 22px; border-radius: 50%; border: 1px solid var(--line-d2); font: 600 semi-condensed 10px/1 var(--mono); font-style: normal; color: var(--mut-d); }
.legend em, .field em { font-style: normal; font-weight: 400; color: var(--mut-d); font-size: 13.5px; }
.opts { display: flex; flex-wrap: wrap; gap: 8px; }
.opts label { position: relative; cursor: pointer; }
.opts input { position: absolute; opacity: 0; pointer-events: none; }
.opts span { display: inline-flex; padding: 10px 15px; border-radius: 999px; border: 1px solid var(--line-d2); font-size: 14.5px; transition: background-color 0.3s, color 0.3s, border-color 0.3s; }
.opts label:hover span { border-color: var(--fg-d); }
.opts input:checked + span { background: var(--fg-d); color: var(--ink); border-color: var(--fg-d); }
.opts input:focus-visible + span { outline: 2px solid var(--signal); outline-offset: 2px; }
.q-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.q-row.three { grid-template-columns: repeat(3, 1fr); }
.field { display: block; margin-bottom: 24px; }
.q-row .field { margin-bottom: 0; }
.field input, .field select, .field textarea {
  width: 100%; padding: 13px 14px; border-radius: 12px; border: 1px solid var(--line-d2); background: var(--ink);
  font-size: 15.5px; outline: none; transition: border-color 0.3s, box-shadow 0.3s; color-scheme: dark;
}
.field textarea { resize: vertical; min-height: 64px; }
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--signal); box-shadow: 0 0 0 4px rgba(70, 255, 162, 0.12); }
.field.is-bad input { border-color: var(--risk); }
.drop { position: relative; display: flex; flex-direction: column; align-items: center; gap: 6px; padding: 26px 18px; border-radius: 16px; border: 1.5px dashed var(--line-d2); text-align: center; cursor: pointer; transition: border-color 0.3s, background-color 0.3s; }
.drop:hover, .drop.is-over { border-color: var(--signal); background: rgba(70, 255, 162, 0.05); }
.drop input { position: absolute; inset: 0; opacity: 0; cursor: pointer; }
.drop-main { font-size: 15.5px; } .drop-main b { font-weight: 600; }
.drop-sub { color: var(--mut-d); font-size: 13.5px; }
.need { list-style: none; margin: 12px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 14px; font: 500 semi-condensed 11px/1 var(--mono); letter-spacing: 0.03em; color: var(--mut-d); }
.need li { display: inline-flex; align-items: center; gap: 7px; transition: color 0.3s; }
.need li::before { content: ""; width: 14px; height: 14px; border-radius: 50%; border: 1.5px solid var(--line-d2); transition: all 0.3s; }
.need li.is-got { color: var(--fg-d); }
.need li.is-got::before { background: var(--signal) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 14 14'%3E%3Cpath d='M3.5 7.3l2.2 2.2 4.8-5' fill='none' stroke='%2303150c' stroke-width='1.8'/%3E%3C/svg%3E") center / 14px no-repeat; border-color: var(--signal); }
.file-list { list-style: none; margin: 12px 0 0; padding: 0; display: grid; gap: 6px; }
.file-list li { display: flex; align-items: center; gap: 10px; padding: 9px 12px; border-radius: 10px; background: var(--ink); border: 1px solid var(--line-d); font-size: 13.5px; }
.file-list em { font: normal 500 semi-condensed 10px/1 var(--mono); text-transform: uppercase; letter-spacing: 0.05em; padding: 4px 7px; border-radius: 6px; background: rgba(226, 178, 90, 0.14); color: var(--gold); }
.file-list button { margin-left: auto; color: var(--mut-d); font-size: 18px; line-height: 1; }
.conf { display: grid; grid-template-columns: 44px 1fr; gap: 14px; align-items: start; padding: 16px; margin: 0 0 24px; border-radius: 16px; border: 1px solid var(--line-d); cursor: pointer; font-size: 14.5px; color: var(--mut-d); transition: border-color 0.3s, background-color 0.3s; }
.conf b { display: block; color: var(--fg-d); font-weight: 600; font-size: 15.5px; margin-bottom: 2px; }
.conf input { position: absolute; opacity: 0; pointer-events: none; }
.switch { position: relative; width: 44px; height: 26px; border-radius: 999px; background: var(--ink-3); border: 1px solid var(--line-d2); transition: background-color 0.3s; }
.switch i { position: absolute; left: 3px; top: 3px; width: 18px; height: 18px; border-radius: 50%; background: var(--mut-d); transition: transform 0.4s var(--ease), background-color 0.3s; }
.conf:has(input:checked) { border-color: rgba(70, 255, 162, 0.5); background: rgba(70, 255, 162, 0.05); }
.conf input:checked + .switch { background: var(--signal); border-color: var(--signal); }
.conf input:checked + .switch i { transform: translateX(18px); background: var(--ink); }
.conf input:focus-visible + .switch { outline: 2px solid var(--signal); outline-offset: 2px; }
.qsubmit { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; }
.fine { margin: 0; font: 500 semi-condensed 10.5px/1.4 var(--mono); color: var(--mut-d); letter-spacing: 0.02em; }
.qdone { position: absolute; inset: 0; z-index: 3; border-radius: inherit; background: var(--ink-2); display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding: 30px; }
.qdone[hidden] { display: none; }
.qdone svg { width: 84px; height: 84px; fill: none; stroke: var(--signal); stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }
.qdone h3 { margin: 18px 0 6px; font-size: 40px; font-weight: 580; letter-spacing: -0.04em; }
.qdone p { margin: 0 0 22px; color: var(--mut-d); max-width: 34ch; }

/* ------------------------------------------------------------ footer */
.foot { position: relative; background: var(--ink); color: var(--fg-d); padding: 90px 0 0; border-top: 1px solid var(--line-d); overflow: hidden; }
.foot-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px; }
.foot h4 { margin: 0 0 12px; font: 600 semi-condensed 10.5px/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--mut-d); }
.foot p { margin: 0; color: #bfc5be; font-size: 15px; line-height: 1.7; }
.foot a { text-decoration: none; } .foot a:hover { color: var(--signal); }
.foot-brand p { margin-top: 14px; max-width: 30ch; }
.foot-fine { margin: 50px auto 0 !important; font: 500 semi-condensed 10.5px/1.5 var(--mono) !important; color: var(--mut-d) !important; }
.foot-word { margin-top: 30px; font-size: 21vw; font-weight: 640; letter-spacing: -0.06em; line-height: 0.72; text-align: center; color: transparent; background: linear-gradient(180deg, rgba(70, 255, 162, 0.26), rgba(70, 255, 162, 0.04) 55%, transparent 80%); -webkit-background-clip: text; background-clip: text; user-select: none; translate: 0 8%; }

/* ------------------------------------------------------------ responsive */
@media (max-width: 1100px) {
  .nav-links { display: none; }
  .nav-review { display: none; }
  .burger { display: block; }
  .phases { grid-template-columns: 1fr; gap: 56px; padding-top: 0; }
  .phase-trace, .ph-dot { display: none; }
  .vol-grid, .prob, .xr-grid, .faq-grid, .quote-grid { grid-template-columns: 1fr; }
  .faq .sec-head, .quote-copy { position: static; }
  .xr { max-width: 640px; width: 100%; justify-self: center; }
  .products { grid-template-columns: repeat(2, 1fr); }
  .creds ul { grid-template-columns: repeat(2, 1fr); }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .pinout { display: none; }
}
@media (max-aspect-ratio: 9/10) {
  .film-poster, .film-video { object-position: 50% 50%; }
  .film-shade { background: linear-gradient(0deg, rgba(2, 3, 3, 0.96) 0%, rgba(2, 3, 3, 0.86) 34%, rgba(2, 3, 3, 0) 58%); }
  .hero { inset: auto 0 0 0; width: 100%; justify-content: flex-end; padding: 0 var(--gut) 104px; }
  .hero-title { font-size: clamp(38px, 10.4vw, 64px); }
  .hero-proof { display: none; }
  .eyebrow { margin-bottom: 14px; }
  .hero-sub { margin-top: 16px; font-size: 16px; }
  .hero-ctas { margin-top: 22px; }
  .hero-proof { margin-top: 20px; }
  .caps { left: var(--gut); right: var(--gut); width: auto; bottom: 104px; }
  .cap h2 { font-size: clamp(30px, 8.4vw, 46px); }
  .cap p { font-size: 15.5px; margin-top: 12px; }
  .cap .cap-tag { margin-top: 14px; }
  .rail { left: var(--gut); right: var(--gut); width: auto; bottom: 34px; }
  .rail button { font-size: 0; width: 100%; height: 14px; }
  .readout { display: none; }
  .cue { bottom: 30px; }
}
@media (max-width: 720px) {
  body { font-size: 16px; }
  .nav { height: 64px; }
  .nav .btn-signal { display: none; }
  .hero-ctas .btn { width: 100%; justify-content: center; }
  .btn-lg { min-height: 54px; font-size: 15px; }
  .products { grid-template-columns: 1fr; }
  .sites { grid-template-columns: 1fr; }
  .floor { aspect-ratio: 4 / 3; }
  .spec { grid-template-columns: 1fr; }
  .q-row, .q-row.three { grid-template-columns: 1fr; gap: 0; }
  .qdone { justify-content: flex-start; padding-top: 90px; }
  .q-row .field { margin-bottom: 20px; }
  .files { grid-template-columns: 1fr; }
  .qa-body > p { padding-right: 0; }
  .bom-head, .bom-row { grid-template-columns: 34px 1fr 58px 48px; padding: 10px 8px; font-size: 13px; }
  .bom-alts, .bom-sign { margin-left: 0; }
  .foot-grid { grid-template-columns: 1fr; }
  .tier dl div { grid-template-columns: 96px 1fr; }
  .vol-num { flex-wrap: wrap; gap: 4px 12px; }
  .vol-ticks i:last-child { display: none; }
  .filters { flex-wrap: nowrap; overflow-x: auto; margin-left: calc(var(--gut) * -1); margin-right: calc(var(--gut) * -1); padding: 0 var(--gut) 6px; scrollbar-width: none; }
  .chip { flex: none; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001s !important; animation-iteration-count: 1 !important; transition-duration: 0.001s !important; }
}