/* BLUEBIRD NEXT: blue-black + cobalt from the Sky Sweep II livery (BLUEBIRD itself is navy + baby blue), same type language */
:root {
  --bg: #050a1c;
  --bg-2: #0a1438;
  --line: rgba(91, 140, 255, 0.22);
  --ink: #f4f7ff;
  --ink-dim: #a3b2d9;
  --accent: #5b8cff;
  --card: #edf1ff;
  --card-ink: #0a1438;
  --card-dim: #4a5a8c;
  --ph: #101c4a;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --sans: "Inter Tight", Inter, system-ui, -apple-system, sans-serif;
}
/* one theme on purpose (a navy product page); tokens stay overridable for a future light variant */
:root[data-theme="light"] { --bg: #f5f7fe; --bg-2: #e8edfb; --ink: #0a1438; --ink-dim: #4a5a8c; --ph: #d8e1fb; }

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { overflow-x: clip; }
html, body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--sans); -webkit-font-smoothing: antialiased; }
a { color: inherit; }
.wrap { max-width: 1240px; margin: 0 auto; padding-left: 16px; padding-right: 16px; }
@media (min-width: 720px) { .wrap { padding-left: 24px; padding-right: 24px; } }

/* ---- nav ---- */
.nav { position: fixed; inset: 0 0 auto 0; z-index: 20; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center;
  padding: 12px 16px; background: rgba(5, 10, 28, 0.72); -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(91, 140, 255, 0.12); }
.brand { display: inline-flex; align-items: center; gap: 9px; text-decoration: none; }
.brand .mark { height: 24px; width: auto; fill: var(--accent); }
.brand .word { height: 11px; width: auto; fill: var(--ink); }
.brand-lg .mark { height: 40px; } .brand-lg .word { height: 16px; }
.brand-lg { align-self: start; }
.links { display: flex; gap: 22px; justify-content: center; }
.links a, .nav-cta { font-size: 12px; text-decoration: none; color: var(--ink-dim); }
.links a:hover, .nav-cta:hover { color: var(--ink); }
.nav-cta { justify-self: end; }
@media (max-width: 640px) { .links { display: none; } .nav { grid-template-columns: 1fr auto; } }

/* ---- hero ---- */
.hero { padding-top: 110px; padding-bottom: 40px; }
.display { font-size: clamp(64px, 15vw, 232px); line-height: 0.9; font-weight: 600; letter-spacing: -0.045em; margin: 0 0 36px -0.04em; }
.meta-row { display: grid; grid-template-columns: 1fr 2fr auto; gap: 24px; align-items: start; }
.meta { display: flex; flex-direction: column; gap: 10px; font-family: var(--mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.04em; }
.dim { color: var(--ink-dim); }
.meta-text { font-family: var(--mono); font-size: 12px; line-height: 1.55; text-transform: uppercase; max-width: 520px; margin: 0; color: var(--ink); }
.down { font-size: 22px; text-decoration: none; color: var(--ink-dim); }
.stage-tag { display: inline-flex; gap: 8px; align-items: center; margin-top: 6px; color: var(--ink); }
@media (max-width: 720px) { .meta-row { grid-template-columns: 1fr; } .down { display: none; } }
/* showroom render: full-bleed under the title, edges fade into the page (positions from showroom_layout.json) */
.hero-shot { margin: -12px calc(50% - 50vw) 34px; }
.hero-frame { position: relative; }
.hero-img { display: block; aspect-ratio: 21 / 9; overflow: hidden; cursor: zoom-in;
  -webkit-mask-image: radial-gradient(ellipse 75% 70% at 50% 55%, #000 50%, transparent 100%);
          mask-image: radial-gradient(ellipse 75% 70% at 50% 55%, #000 50%, transparent 100%); }
.hero-img picture, .hero-img img { display: block; width: 100%; height: 100%; }
.hero-img img { object-fit: cover; object-position: 50% 58%; }
.hero-lbl { position: absolute; top: 79%; transform: translateX(-50%); white-space: nowrap; display: flex; flex-direction: column; align-items: center; gap: 4px;
  font-family: var(--mono); font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-dim); pointer-events: none; }
.hero-lbl b { font-family: var(--sans); font-size: clamp(14px, 1.6vw, 22px); font-weight: 600; letter-spacing: 0.02em; color: var(--ink); }
.hero-lbl i { font-style: normal; color: var(--accent); }
.hero-lbl.l { left: 29.6%; } .hero-lbl.r { left: 70.4%; }
.hero-shot figcaption { display: flex; gap: 10px; align-items: baseline; justify-content: center; padding: 0 16px; margin-top: 6px;
  font-family: var(--mono); font-size: 10.5px; line-height: 1.5; color: var(--ink-dim); text-align: center; }
.hero-shot .tag { font-size: 9.5px; text-transform: uppercase; letter-spacing: 0.06em; color: #fff; background: rgba(91, 140, 255, 0.28); padding: 2px 7px; }
@media (max-width: 640px) {
  .hero-shot { margin-top: -18px; }
  .hero-img { aspect-ratio: 4 / 3; }
  .hero-lbl { top: 73%; font-size: 9px; } .hero-lbl b { font-size: 13px; }
  .hero-lbl.l { left: 22.8%; } .hero-lbl.r { left: 77.2%; }
}

/* ---- pinned flight stage ---- */
.flight { height: 420vh; position: relative; }          /* main.js sets the full height (flight + x-ray tour) */
.stage { position: sticky; top: 0; height: 100vh; overflow: hidden;
  background: radial-gradient(ellipse at 50% 45%, #0c1520 0%, #05080c 45%, #000 80%); }
#view, .still { position: absolute; inset: 0; width: 100%; height: 100%; display: block; object-fit: cover; }
.still[hidden], #view[hidden], .viewer-bar[hidden] { display: none; }
.hud { position: absolute; bottom: 22px; font-family: var(--mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em;
  color: #fff; text-shadow: 0 1px 8px rgba(0, 8, 40, 0.6); display: flex; align-items: center; gap: 8px; }
.hud-l { left: 16px; } .hud-r { right: 16px; }
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 10px var(--accent); display: inline-block; }
.stage.viewer { position: fixed; inset: 0; z-index: 50; height: 100vh; }
.viewer-bar { position: absolute; top: 16px; left: 50%; transform: translateX(-50%); display: flex; gap: 6px; flex-wrap: wrap; justify-content: center; }
.viewer-bar button { font-family: var(--mono); font-size: 11px; text-transform: uppercase; padding: 8px 12px; border: 1px solid rgba(255,255,255,0.5);
  background: rgba(5, 10, 28, 0.55); color: #fff; cursor: pointer; }
.viewer-bar button[aria-pressed="true"] { background: var(--accent); color: var(--card-ink); border-color: var(--accent); }
.viewer-bar .close { margin-left: 10px; }

/* x-ray tour card */
.tour-card { position: absolute; left: max(16px, 5vw); top: 50%; width: min(380px, 38vw); transform: translateY(calc(-50% + var(--lift, 0px)));
  padding: 18px 20px 14px; background: rgba(4, 8, 24, 0.72); -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
  border: 1px solid rgba(91, 140, 255, 0.16); border-left: 2px solid var(--sys, var(--accent)); color: var(--ink); pointer-events: none; }
.tc-kicker { font-family: var(--mono); font-size: 10px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--sys, var(--accent)); }
.tc-title { font-size: clamp(24px, 2.6vw, 34px); font-weight: 500; letter-spacing: -0.02em; margin: 6px 0 10px; }
.tc-mode { font-family: var(--mono); font-size: 11px; color: var(--sys, var(--accent)); margin: -4px 0 10px; min-height: 1em; }
.tc-mode:empty { display: none; }
.tour-legend { position: absolute; right: max(16px, 4vw); top: 50%; transform: translateY(-50%); list-style: none; margin: 0; padding: 14px 16px;
  background: rgba(4, 8, 24, 0.6); -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px); border: 1px solid rgba(91, 140, 255, 0.16);
  font-family: var(--mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--ink); pointer-events: none; }
.tour-legend li { display: flex; align-items: center; gap: 10px; padding: 4px 0; }
.tour-legend i { width: 10px; height: 10px; border-radius: 2px; display: inline-block; }
.tc-text { font-size: 14px; line-height: 1.55; color: #cdd6f0; margin: 0 0 12px; }
.tc-specs { margin: 0; }
.tc-specs div { border-top: 1px solid rgba(91, 140, 255, 0.16); padding: 7px 0 5px; display: grid; grid-template-columns: 96px 1fr; gap: 10px; }
.tc-specs dt { font-family: var(--mono); font-size: 9.5px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-dim); padding-top: 1px; }
.tc-specs dd { margin: 0; font-family: var(--mono); font-size: 11px; color: var(--ink); }
.skip { position: absolute; bottom: 20px; left: 50%; transform: translateX(-50%); font-family: var(--mono); font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-dim); text-decoration: none; padding: 6px 10px;
  border: 1px solid rgba(91, 140, 255, 0.25); background: rgba(4, 8, 24, 0.5); }
.skip:hover { color: var(--ink); border-color: var(--accent); }
.skip[hidden] { display: none; }
@media (max-width: 720px) {
  .tour-card { left: 12px; right: 12px; width: auto; top: auto; bottom: 56px; transform: translateY(var(--lift, 0px)); padding: 14px 16px 10px; }
  .tc-text { font-size: 13px; }
  .skip { bottom: auto; top: 64px; }
  .tour-legend { right: 12px; top: auto; bottom: 56px; transform: none; font-size: 10px; columns: 2; column-gap: 18px; }
}

/* ---- sections ---- */
.section { padding-top: 96px; padding-bottom: 32px; }
.h2 { font-size: clamp(26px, 3.2vw, 40px); font-weight: 500; letter-spacing: -0.02em; margin: 0 0 28px; }
.ph { background: var(--ph); position: relative; }
.ph::after { content: attr(data-ph); position: absolute; left: 12px; bottom: 10px; font-family: var(--mono); font-size: 10px;
  text-transform: uppercase; letter-spacing: 0.05em; color: var(--ink-dim); }

/* cards: light, with a clipped corner */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 12px; }
.card { background: var(--card); color: var(--card-ink); padding: 18px 18px 14px; clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%); }
.card h3 { font-size: 16px; font-weight: 600; margin: 0 0 14px; }
.card .media { height: 190px; margin: 0 -4px 16px; background: #d8e1fb; }
.card .media::after { color: var(--card-dim); }
.card dl { margin: 0; }
.card dl div { border-top: 1px solid rgba(10, 20, 56, 0.14); padding: 8px 0 6px; }
.card dt { font-family: var(--mono); font-size: 9.5px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--card-ink); }
.card dd { margin: 2px 0 0; font-family: var(--mono); font-size: 11px; color: var(--card-dim); }

/* interactive-view call to action */
.viewer-cta { padding-top: 120px; }
.sys-online { font-family: var(--mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em; display: flex; gap: 8px; align-items: center; }
.cta-row { display: flex; justify-content: space-between; align-items: end; gap: 16px; margin-top: 140px; border-bottom: 1px solid var(--line); padding-bottom: 20px; flex-wrap: wrap; }
.cta-row p { margin: 0; font-size: 15px; max-width: 360px; }
.btn { font-family: var(--mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.05em; padding: 12px 18px; background: transparent;
  color: var(--ink); border: 1px solid var(--ink); cursor: pointer; }
.btn:hover { background: var(--accent); border-color: var(--accent); color: var(--card-ink); }

/* design qualities */
.tabs { display: flex; gap: 22px; border-bottom: 1px solid var(--line); margin-bottom: 14px; overflow-x: auto; }
.tabs button { background: none; border: 0; color: var(--ink-dim); font-family: var(--sans); font-size: 12px; padding: 0 0 10px; cursor: pointer; white-space: nowrap; }
.tabs button[aria-selected="true"] { color: var(--ink); box-shadow: inset 0 -1px 0 var(--ink); }
.quality { display: grid; grid-template-columns: 0.7fr 1.5fr 2.2fr; gap: 20px; background: var(--card); color: var(--card-ink); padding: 18px; min-height: 250px; }
.q-num { display: flex; flex-direction: column; justify-content: space-between; }
.q-idx, .q-kicker { font-family: var(--mono); font-size: 10px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--card-dim); }
.big { font-size: 96px; font-weight: 500; line-height: 1; }
.q-body p { font-size: 18px; line-height: 1.35; margin: 12px 0 0; max-width: 460px; }
.q-media { background: #d8e1fb; min-height: 180px; }
.q-cap { font-family: var(--mono); font-size: 10px; line-height: 1.5; color: var(--card-dim); margin: 8px 0 0; }
.q-cap:empty { display: none; }
/* finished media in a slot */
.shot { position: relative; overflow: hidden; cursor: zoom-in; }
.shot picture, .shot img { display: block; width: 100%; height: 100%; }
.shot img { object-fit: cover; }
.q-media.shot img, .q-media.shot picture { height: auto; }
.shot .tag { position: absolute; left: 8px; bottom: 8px; font-family: var(--mono); font-size: 9.5px; text-transform: uppercase;
  letter-spacing: 0.06em; color: #fff; background: rgba(10, 20, 56, 0.62); padding: 3px 7px; pointer-events: none; }
.q-media::after { color: var(--card-dim); }
@media (max-width: 820px) { .quality { grid-template-columns: 1fr; } .big { font-size: 64px; } }
.quality[hidden], .method[hidden] { display: none; }
.tabs .tab-method { color: var(--accent); }

/* methodology: step list + decision card */
.method { background: var(--card); color: var(--card-ink); padding: 22px; clip-path: polygon(0 0, calc(100% - 28px) 0, 100% 28px, 100% 100%, 0 100%); }
.m-head { display: flex; justify-content: space-between; align-items: end; gap: 16px; flex-wrap: wrap; padding-bottom: 18px;
  border-bottom: 1px solid rgba(10, 20, 56, 0.14); }
.m-lede { margin: 0; font-size: 18px; line-height: 1.35; max-width: 620px; }
.m-paper { color: var(--card-ink); border-color: var(--card-ink); text-decoration: none; }
.m-steps { list-style: none; margin: 0; padding: 14px 0; display: flex; gap: 6px; overflow-x: auto; border-bottom: 1px solid rgba(10, 20, 56, 0.14); }
.m-steps button { font-family: var(--mono); font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.04em; white-space: nowrap;
  padding: 8px 10px; background: transparent; color: var(--card-dim); border: 1px solid rgba(10, 20, 56, 0.18); cursor: pointer; }
.m-steps button[aria-selected="true"] { background: var(--card-ink); color: #fff; border-color: var(--card-ink); }
.m-steps .n { opacity: 0.6; margin-right: 6px; }
@media (min-width: 720px) { .m-steps { flex-wrap: wrap; overflow: visible; } }
.m-body { display: grid; grid-template-columns: 1.15fr 1fr; gap: 28px; padding-top: 20px; }
.m-kicker { font-family: var(--mono); font-size: 10px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--card-dim); }
.m-decision { font-size: clamp(20px, 2.2vw, 26px); font-weight: 500; letter-spacing: -0.01em; line-height: 1.2; margin: 8px 0 12px; }
.m-why { font-size: 14px; line-height: 1.55; margin: 0 0 16px; color: #1c2c66; }
.m-trade-wrap { overflow-x: auto; margin: 0 0 14px; }
.m-trade { border-collapse: collapse; width: 100%; font-family: var(--mono); font-size: 10.5px; }
.m-trade th { text-align: left; font-weight: 500; text-transform: uppercase; letter-spacing: 0.04em; color: var(--card-dim);
  border-bottom: 1px solid rgba(10, 20, 56, 0.3); padding: 6px 8px 6px 0; white-space: nowrap; }
.m-trade td { border-bottom: 1px solid rgba(10, 20, 56, 0.12); padding: 7px 8px 7px 0; vertical-align: top; color: #1c2c66; }
.m-trade tr.win td { color: var(--card-ink); font-weight: 500; }
.m-trade tr.win td:first-child::before { content: "\25B8 "; color: #2f7fb8; }
.m-method { font-family: var(--mono); font-size: 10.5px; line-height: 1.6; color: var(--card-dim); margin: 0; }
.m-method b { color: var(--card-ink); font-weight: 500; }
.m-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 8px; margin-bottom: 14px; }
.m-stat { border-top: 2px solid var(--card-ink); padding-top: 8px; }
.m-stat .v { font-size: 26px; font-weight: 500; letter-spacing: -0.02em; }
.m-stat .v small { font-size: 13px; font-weight: 400; margin-left: 2px; color: var(--card-dim); }
.m-stat .l { font-family: var(--mono); font-size: 9.5px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--card-dim); margin-top: 2px; }
.m-fig { margin: 0; background: #fff; border: 1px solid rgba(10, 20, 56, 0.12); }
.m-fig img { display: block; width: 100%; height: auto; }
.m-fig[hidden] { display: none; }
.m-fig figcaption { font-family: var(--mono); font-size: 10px; line-height: 1.5; color: var(--card-dim); padding: 8px 10px; }
.m-thumbs { display: flex; gap: 6px; margin-top: 8px; flex-wrap: wrap; }
.m-thumbs button { width: 72px; height: 44px; padding: 0; border: 1px solid rgba(10, 20, 56, 0.18); background: #fff; cursor: pointer; opacity: 0.6; }
.m-thumbs button[aria-pressed="true"] { opacity: 1; border-color: var(--card-ink); }
.m-thumbs img { width: 100%; height: 100%; object-fit: cover; display: block; }
.m-fig img { cursor: zoom-in; }
.m-more { display: inline-block; margin-top: 12px; font-family: var(--mono); font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.05em;
  color: var(--card-ink); }
@media (max-width: 860px) { .m-body { grid-template-columns: 1fr; } }

/* uses */
.uses { display: grid; grid-template-columns: 1fr 1fr; border: 1px solid var(--line); }
.use { padding: 18px; }
.use + .use { border-left: 1px solid var(--line); }
.use h3 { font-size: 15px; font-weight: 500; margin: 0 0 14px; }
.use .media.tall { height: 300px; margin-bottom: 14px; }
.use p { font-size: 13px; line-height: 1.5; color: var(--ink-dim); margin: 0; max-width: 460px; }
@media (max-width: 720px) { .uses { grid-template-columns: 1fr; } .use + .use { border-left: 0; border-top: 1px solid var(--line); } }

/* film */
.film { aspect-ratio: 16 / 9; width: 100%; display: block; background: #050a1c; }
.film-cap { font-family: var(--mono); font-size: 10.5px; color: var(--ink-dim); margin: 10px 0 0; }
.media.wide { aspect-ratio: 2 / 1; width: 100%; margin-top: 28px; }

/* status */
.status-line { font-size: clamp(22px, 3vw, 34px); font-weight: 500; letter-spacing: -0.01em; margin: 18px 0 0; max-width: 780px; }

/* next milestone */
.milestone { margin-top: 36px; border: 1px solid var(--line); padding: 26px 26px 22px; }
.ms-title { font-size: clamp(18px, 2vw, 22px); font-weight: 500; margin: 0 0 22px; display: flex; flex-direction: column; gap: 8px; }
.ms-kicker { font-family: var(--mono); font-size: 10.5px; font-weight: 400; text-transform: uppercase; letter-spacing: 0.06em; color: var(--accent); }
.ms-cols { display: grid; grid-template-columns: 1fr 1fr 1.3fr; gap: 28px; }
.ms-cols h4 { font-family: var(--mono); font-size: 10px; font-weight: 400; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-dim); margin: 0 0 12px; }
.ms-big { font-size: 30px; font-weight: 500; letter-spacing: -0.01em; margin: 0 0 12px; }
.ms-list { margin: 0; }
.ms-list div { display: flex; justify-content: space-between; gap: 12px; border-top: 1px solid var(--line); padding: 7px 0; font-size: 13px; }
.ms-list dt { color: var(--ink-dim); }
.ms-list dd { margin: 0; font-family: var(--mono); font-size: 12px; white-space: nowrap; }
.ms-note { font-family: var(--mono); font-size: 10.5px; line-height: 1.5; color: var(--ink-dim); margin: 10px 0 0; }
.ms-ul { margin: 0; padding-left: 18px; font-size: 13.5px; line-height: 1.5; }
.ms-ul li { margin-bottom: 8px; }
.ms-ul b { font-weight: 600; }
@media (max-width: 860px) { .ms-cols { grid-template-columns: 1fr; gap: 22px; } .milestone { padding: 20px 18px 16px; } }

/* footer */
.footer { padding-top: 120px; padding-bottom: 40px; border-top: 1px solid var(--line); margin-top: 96px; display: grid;
  grid-template-columns: 1fr 2fr; gap: 24px; }
.f-cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.f-cols h4 { font-family: var(--mono); font-size: 10px; font-weight: 400; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-dim); margin: 0 0 12px; }
.f-cols a, .f-cols span { display: block; font-size: 13px; text-decoration: none; margin-bottom: 6px; }
.f-cols a:hover { color: var(--accent); }
.seeking { font-size: 14px; line-height: 1.5; max-width: 360px; margin: 22px 0 0; color: var(--ink); }
.copy { grid-column: 1 / -1; font-family: var(--mono); font-size: 10px; text-transform: uppercase; color: var(--ink-dim); margin: 40px 0 0; }
@media (max-width: 720px) { .footer { grid-template-columns: 1fr; } }

/* Whole-system navigation and isolation. */
.tour-legend { pointer-events: auto; }
.tour-legend li { padding: 0; }
.tour-legend button { display: flex; align-items: center; gap: 10px; padding: 6px 0; border: 0; background: none; color: inherit; font: inherit; text-transform: inherit; letter-spacing: inherit; cursor: pointer; text-align: left; }
.tour-legend button:hover { color: #fff; text-decoration: underline; text-underline-offset: 4px; }
.subsystem-panel { position: absolute; z-index: 3; right: 20px; top: 88px; width: 280px; padding: 20px; box-sizing: border-box; color: #e8ecf8; background: rgba(5,10,28,.96); border: 1px solid #36536b; border-top: 3px solid #8dccf2; border-radius: 4px; box-shadow: 0 10px 35px #0005; }
.subsystem-panel[hidden], .subsystem-panel [hidden] { display: none; }
.subsystem-panel h3 { margin: 0 0 20px; font-size: 19px; font-weight: 500; }
.subsystem-panel label { display: block; font: 10px var(--mono); color: #a8bed1; }
.subsystem-panel select, .subsystem-panel button { font: 12px var(--mono); border: 1px solid #456077; background: #102b40; color: #e8ecf8; padding: 10px; border-radius: 3px; cursor: pointer; }
.subsystem-panel select { display: block; width: 100%; margin-top: 8px; }
.subsystem-summary { color: #b5c1e6; font-size: 13px; line-height: 1.6; }
.subsystem-panel :focus-visible, .tour-legend button:focus-visible, .viewer-bar button:focus-visible { outline: 2px solid #ffdc86; outline-offset: 3px; }
.viewer-bar { z-index: 4; width: max-content; max-width: calc(100% - 24px); }
.viewer.showing-systems #view { width: calc(100% - 330px); }
@media (max-width: 700px) {
  .viewer.showing-systems #view { width: 100%; top: 58px; height: calc(62vh - 58px); }
  .subsystem-panel { top: auto; bottom: 12px; right: 12px; width: calc(100% - 24px); max-height: 34vh; overflow-y: auto; padding: 14px; }
  .subsystem-panel h3 { margin-bottom: 12px; font-size: 17px; }
  .viewer-bar button { padding: 8px; font-size: 10px; }
  .stage.viewer .hud { display: none; }
}

/* Current CAD tour: deliberate lighting, clear navigation, assembled/exploded views. */
.stage { background: radial-gradient(ellipse at 44% 44%, #142c3d 0%, #081521 48%, #030a10 100%); }
.tour-legend { border: 1px solid #5e839a55; border-radius: 8px; padding: 16px; box-shadow: 0 20px 50px #0005; min-width: 210px; }
.tour-legend::before { content: "EXPLORE A SUBSYSTEM"; display: block; color: #83b5d5; font-size: 9px; letter-spacing: .12em; padding: 2px 0 14px; }
.tour-legend li button { padding: 9px 8px; width: 100%; border-radius: 4px; }
.tour-legend button:hover { background: #8dcced15; text-decoration: none; }
.tour-actions { position: absolute; z-index: 2; left: 24px; top: 80px; display: flex; gap: 8px; }
.tour-actions[hidden] { display: none; }
.tour-actions button, .tour-actions select { border: 1px solid #43637b; background: #050a1ce8; color: #dde6ff; font: 11px var(--mono); padding: 10px; border-radius: 4px; cursor: pointer; }
.skip { color: #dde6ff; background: #050a1ced; padding: 10px 14px; border-radius: 4px; z-index: 3; }
.hud-r { opacity: .7; }
.stage.viewer .hud-r { display: none; }
@media(max-width:720px){
 .tour-actions { left: 12px; top: 62px; }
 .tour-actions button,.tour-actions select { font-size: 10px; padding: 8px; }
 .skip { top: auto; bottom: 16px; }
 .tour-legend { left: 12px; right: 12px; bottom: 64px; min-width: 0; columns: 2; padding: 12px; }
 .tour-legend::before { column-span: all; padding-bottom: 6px; }
 .tour-legend li button { padding: 7px 3px; font-size: 10px; }
}


/* ---- NEXT additions (site_next only) ---- */
.display .next { color: var(--accent); }
.display { font-size: clamp(52px, 11.5vw, 178px); }

/* x-ray comparison: the interim page's viewer, namespaced under .cmp */
.cmp { --panel: #0a1236; --dim: var(--ink-dim);
  --c-battery: #ff9f43; --c-brain: #ff5fa2; --c-avionics: #4da3ff; --c-camera: #3ddc97; --c-radio: #b78cff;
  --c-motor: #aeb6c2; --c-structure: #a3b2d9; }
.cmp [hidden] { display: none !important; }
.cmp-lede { color: var(--ink-dim); font-size: 16px; max-width: 760px; margin: -6px 0 18px; }
.cmp .controls { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; justify-content: space-between;
  padding: 14px 0; border-top: 1px solid var(--line); }
.cmp .seg { display: inline-flex; border: 1px solid var(--line); overflow: hidden; }
.cmp .seg button { background: transparent; color: var(--ink-dim); border: 0; padding: 9px 16px; font: 500 13px var(--sans); cursor: pointer; }
.cmp .seg button + button { border-left: 1px solid var(--line); }
.cmp .seg button[aria-pressed="true"] { background: rgba(91, 140, 255, .14); color: var(--ink); }
.cmp .seg button:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }
.cmp .pair { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.cmp figure { margin: 0; background: var(--panel); border: 1px solid var(--line); overflow: hidden; }
.cmp figure img { display: block; width: 100%; height: auto; }
.cmp figcaption { display: flex; align-items: baseline; gap: 10px; padding: 12px 16px; border-bottom: 1px solid var(--line); }
.cmp figcaption b { font-weight: 600; font-size: 16px; }
.cmp figcaption span { font: 11px var(--mono); color: var(--accent); }
.cmp .wipe { position: relative; overflow: hidden; border: 1px solid var(--line); background: var(--panel); touch-action: pan-y; user-select: none; }
.cmp .wipe img { display: block; width: 100%; height: auto; }
.cmp .wipe .top { position: absolute; inset: 0; clip-path: inset(0 calc(100% - var(--x, 50%)) 0 0); }
.cmp .wipe .bar { position: absolute; top: 0; bottom: 0; left: var(--x, 50%); width: 2px; margin-left: -1px;
  background: var(--accent); box-shadow: 0 0 12px rgba(91, 140, 255, .8); pointer-events: none; }
.cmp .wipe .knob { position: absolute; top: 50%; left: var(--x, 50%); width: 38px; height: 38px; margin: -19px 0 0 -19px;
  border-radius: 50%; background: var(--bg); border: 2px solid var(--accent); pointer-events: none;
  display: grid; place-items: center; color: var(--accent); font: 600 14px var(--mono); }
.cmp .wipe .tag { position: absolute; top: 14px; font: 600 12px var(--mono); letter-spacing: .08em; padding: 6px 10px;
  background: rgba(4, 8, 24, .75); border: 1px solid var(--line); }
.cmp .wipe .tag.l { left: 14px; } .cmp .wipe .tag.r { right: 14px; color: var(--accent); }
.cmp .wipe input { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0; cursor: ew-resize; margin: 0; }
.cmp .hint { color: var(--ink-dim); font-size: 13px; margin: 10px 2px 0; }
.cmp .legend { display: flex; flex-wrap: wrap; gap: 8px 18px; margin: 16px 2px 0; font-size: 13px; color: var(--ink-dim); }
.cmp .legend i { display: inline-block; width: 12px; height: 12px; border-radius: 3px; margin-right: 7px; vertical-align: -1px; }
.cmp-block { padding-top: 40px; }
.cmp-h { font-size: 20px; font-weight: 600; margin: 0 0 16px; }
.cmp .changes { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 12px; }
.cmp-card { background: var(--panel); border: 1px solid var(--line); padding: 18px 20px; }
.cmp-card h3 { margin: 0 0 6px; font-size: 16px; font-weight: 600; display: flex; align-items: center; gap: 9px; }
.cmp-card h3 i { width: 10px; height: 10px; border-radius: 3px; flex: none; }
.cmp-card p { margin: 0; color: var(--ink-dim); font-size: 14.5px; line-height: 1.5; }
.cmp-card .ft { font: 12px var(--mono); color: var(--ink); margin-top: 10px; }
.cmp .tablewrap { overflow-x: auto; background: var(--panel); border: 1px solid var(--line); }
.cmp table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
.cmp th, .cmp td { text-align: right; padding: 11px 12px; border-bottom: 1px solid var(--line); white-space: nowrap; }
.cmp th:first-child, .cmp td:first-child { text-align: left; white-space: normal; }
.cmp th { font: 500 11px var(--mono); color: var(--ink-dim); text-transform: uppercase; letter-spacing: .08em; }
.cmp td { font-variant-numeric: tabular-nums; }
.cmp td.n { color: var(--accent); font-weight: 600; }
.cmp td.d { font: 12px var(--mono); color: var(--ink-dim); }
.cmp .notes { color: var(--ink-dim); font-size: 14px; line-height: 1.55; max-width: 900px; padding-left: 18px; }
.cmp .notes li { margin-bottom: 8px; }
@media (max-width: 760px) { .cmp .pair { grid-template-columns: 1fr; } .cmp th, .cmp td { padding: 9px 8px; } }

/* built to scale */
.scale-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; margin: 6px 0 12px; }
.scale-stat { background: var(--panel); border: 1px solid var(--line); padding: 20px 22px; display: flex; flex-direction: column; gap: 6px; }
.scale-stat .k { font: 11px var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--ink-dim); }
.scale-stat b { font-size: clamp(34px, 5vw, 52px); font-weight: 700; letter-spacing: -.03em; line-height: 1; color: var(--ink-dim); }
.scale-stat.hi b { color: var(--accent); }
.scale-stat span:last-child { color: var(--ink-dim); font-size: 14px; }
#scale .changes { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 720px) { #scale .changes { grid-template-columns: 1fr; } }