/* Tagil SPA laser proposal. Tokens: SONICOLOGY canon (catalog/design.md) + Hideout template.
   Laser colours (l638/l525/l450) appear only as strokes and figures, never as fills. */
:root{color-scheme:dark;
  --bg:#0a0b10;--surface:#14161d;--ink:#f4f4f7;--muted:#b4b6c0;--line:#353943;--hair:rgba(244,244,247,.12);
  --accent:#6fc9e6;--nav:rgba(10,11,16,.96);
  --l638:#ff4a3a;--l525:#38f07a;--l450:#6f86ff;
  --max:1240px;--gutter:48px;--ease:cubic-bezier(.16,1,.3,1)}
:root[data-theme=day]{color-scheme:light;
  --bg:#f6f7f8;--surface:#e9edf0;--ink:#151a22;--muted:#4b5662;--line:#bdc5cd;--hair:rgba(21,26,34,.14);
  --accent:#126278;--nav:rgba(246,247,248,.96);
  --l638:#b3261a;--l525:#0e7a3a;--l450:#2d3fcc}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:88px}
body{margin:0;background:var(--bg);color:var(--ink);font:400 16px/1.7 Inter,Arial,sans-serif;transition:background-color .28s,color .28s}
::selection{background:var(--accent);color:var(--bg)}
a{color:inherit;text-decoration:none}
a:hover{color:var(--accent)}
button{font:inherit;color:inherit}
img{display:block;width:100%;height:auto}
figure{margin:0}
figcaption{font-size:12px;line-height:1.55;color:var(--muted);margin-top:12px;max-width:72ch}
p{margin:0 0 1.15em;max-width:68ch;text-wrap:pretty}
h1,h2,h3,h4{margin:0;font-family:Jost,Arial,sans-serif;font-weight:300;line-height:1.1;text-wrap:balance}
h2{font-size:clamp(34px,4.2vw,58px);letter-spacing:-.025em;margin-bottom:40px}
h3{font-size:24px;letter-spacing:-.01em}
a:focus-visible,button:focus-visible,video:focus-visible{outline:2px solid var(--accent);outline-offset:4px}
.fig{font-family:'Space Grotesk',Inter,Arial,sans-serif;font-weight:300;font-variant-numeric:tabular-nums;letter-spacing:-.01em}
mark.verify{background:none;color:inherit;font-size:.86em;border-bottom:1px dashed var(--muted);padding:0 1px}
.print-only{display:none}

/* Chrome bar */
.skip{position:fixed;left:16px;top:10px;background:var(--ink);color:var(--bg);padding:10px 14px;z-index:30;transform:translateY(-200%);visibility:hidden}
.skip:focus{transform:none;visibility:visible}
.topbar{position:sticky;top:0;z-index:10;display:flex;align-items:center;gap:24px;min-height:68px;padding:12px var(--gutter);border-bottom:1px solid var(--line);background:var(--nav);will-change:transform}
.brand{font:400 15px/1 Jost,Arial,sans-serif;letter-spacing:.18em;white-space:nowrap}
.brand span{color:var(--muted);padding:0 6px;letter-spacing:0}
.topbar nav{display:flex;gap:28px;margin-left:auto;font-size:13px}
.topbar nav a{padding:12px 0}
.theme,.sound{display:flex;align-items:center;gap:3px;padding:4px;min-height:44px;border:1px solid var(--line);border-radius:30px;background:transparent;color:var(--muted);font-size:12px;cursor:pointer;white-space:nowrap}
.sound{padding:4px 14px}
.sound[hidden]{display:none}   /* display:flex above would otherwise defeat the hidden attribute */
.sound[aria-pressed=true]{color:var(--ink);border-color:var(--accent)}
.theme span{padding:6px 12px;border-radius:30px}
.theme-night{background:var(--ink);color:var(--bg)}
[data-theme=day] .theme-day{background:var(--ink);color:var(--bg)}
[data-theme=day] .theme-night{background:none;color:var(--muted)}
.theme:hover,.sound:hover{border-color:var(--accent)}

/* Hero: copy left, film right */
.hero{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:56px;align-items:center;max-width:1600px;margin:0 auto;padding:72px var(--gutter) 64px}
.intro{font-size:12px;color:var(--muted);margin-bottom:28px}
.hero h1{font-size:clamp(46px,5.2vw,84px);letter-spacing:-.03em;line-height:1.02}
.hero-lead{font:300 clamp(20px,1.8vw,26px)/1.45 Jost,Arial,sans-serif;margin:28px 0 36px;max-width:30ch}
.button{display:inline-flex;align-items:center;justify-content:center;min-height:52px;padding:14px 26px;background:var(--ink);color:var(--bg);font-size:14px;border-radius:2px;transition:background-color .2s var(--ease),transform .15s var(--ease)}
.button:hover{background:var(--accent);color:var(--bg)}
.button:active{transform:translateY(1px)}
.video-frame{position:relative;overflow:hidden;background:#05060a;aspect-ratio:16/9}
.video-frame video{display:block;width:100%;height:100%;object-fit:cover}
.video-toggle{position:absolute;right:12px;bottom:12px;min-height:36px;min-width:72px;padding:6px 14px;border:1px solid rgba(244,244,247,.4);border-radius:30px;background:rgba(10,11,16,.72);color:#f4f4f7;font-size:12px;cursor:pointer}
.video-toggle:hover{border-color:#6fc9e6}

/* Signature: the band at its true 85:1 proportion */
.band-section{max-width:1600px;margin:0 auto;padding:24px var(--gutter) 88px}
.band-wrap{border-top:1px solid var(--hair);border-bottom:1px solid var(--hair)}
.band-svg{display:block;width:100%;height:auto;aspect-ratio:85/1}
.band-ground{fill:var(--surface)}
.band-seg{fill:none;stroke-width:1.5;vector-effect:non-scaling-stroke;stroke-linecap:round;stroke-dasharray:1;stroke-dashoffset:var(--draw,0)}
.band-seg.l638{stroke:var(--l638)}.band-seg.l525{stroke:var(--l525)}.band-seg.l450{stroke:var(--l450)}
.band-caption{margin:16px 0 0;font-size:13px;color:var(--muted);max-width:none}

/* Sections */
.section{max-width:var(--max);margin:0 auto;padding:104px var(--gutter);border-top:1px solid var(--line)}
.prose{max-width:68ch}
.prose-2{columns:2;column-gap:56px}
.prose-2 p{break-inside:avoid;max-width:none}
.sub{font-size:30px;margin:64px 0 24px}
.wide{margin:40px 0 0}

.figures{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:32px;margin:48px 0 0;padding-top:28px;border-top:1px solid var(--hair)}
.figures div{margin:0}
.figures dt{font-size:12px;color:var(--muted);order:2}
.figures dd{margin:0 0 6px;font-size:clamp(40px,4.6vw,64px);line-height:1.05}
.figures div{display:flex;flex-direction:column}
.figures dd{order:1}

.waves{display:flex;gap:56px;margin:0 0 44px;padding-bottom:28px;border-bottom:1px solid var(--hair)}
.waves div{display:flex;flex-direction:column}
.waves dt{order:2;font-size:12px;color:var(--muted)}
.waves dd{order:1;margin:0 0 4px;font-size:clamp(34px,3.6vw,52px);line-height:1.05}
.waves .w638 .fig{color:var(--l638)}.waves .w525 .fig{color:var(--l525)}.waves .w450 .fig{color:var(--l450)}

.programme-video{margin-top:40px}
.band-photo{margin-top:32px}
.band-photo img{background:#05060a}

.params{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:36px 56px;margin:40px 0 44px}
.param{border-top:1px solid var(--hair);padding-top:20px}
.param h3{margin-bottom:12px}
.param p{color:var(--muted);font-size:15px;margin:0}

.sculpture{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:56px;align-items:center}
.sculpture h2{margin-bottom:28px}

.eng-grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:56px;align-items:start}
.risk{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:20px 0 4px;margin:8px 0 22px}
.risk p::before{content:'Риск. ';font-weight:500}
.specs{background:var(--surface);padding:28px 28px 8px}
.specs h3{font-size:22px;margin-bottom:22px}
.spec-group{margin-bottom:22px}
.spec-group h4{font:500 13px/1.4 Inter,Arial,sans-serif;color:var(--muted);margin-bottom:8px}
.spec-group dl{margin:0}
.spec-group dl div{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:16px;padding:8px 0;border-top:1px solid var(--hair);font-size:14px;line-height:1.5}
.spec-group dt{color:var(--muted)}
.spec-group dd{margin:0}

.timeline{list-style:none;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;margin:44px 0 0;padding:0;counter-reset:none}
.timeline li{position:relative;padding:22px 24px 0 0;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:6px}
.timeline li::before{content:'';position:absolute;top:-4px;left:0;width:7px;height:7px;border-radius:50%;background:var(--accent)}
.timeline b{font:300 22px/1.25 Jost,Arial,sans-serif}
.timeline span{font-size:13px;color:var(--muted)}
.price-line{margin:56px 0 0;padding:28px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);font:300 clamp(24px,2.6vw,34px)/1.3 Jost,Arial,sans-serif;max-width:none}

.roles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:40px;margin-bottom:40px}
.roles div{border-top:1px solid var(--hair);padding-top:20px}
.roles h3{margin-bottom:10px}
.roles p{color:var(--muted);font-size:14px;margin:0}
.open{margin:0 0 40px;padding:0 0 0 1.1em;max-width:72ch}
.open li{margin-bottom:10px}
.open li::marker{color:var(--accent)}

.footer{max-width:var(--max);margin:0 auto;padding:28px var(--gutter) 44px;display:flex;justify-content:space-between;gap:20px;color:var(--muted);font-size:11px;border-top:1px solid var(--line)}
.footer a{padding:4px 0}

@media(max-width:1050px){
  :root{--gutter:32px}
  .topbar nav{display:none}
  .hero{grid-template-columns:1fr;gap:36px;padding-top:48px}
  .hero-lead{max-width:none}
  .section{padding:80px var(--gutter)}
  .sculpture,.eng-grid{grid-template-columns:1fr;gap:36px}
}
@media(max-width:700px){
  :root{--gutter:20px}
  html{scroll-padding-top:72px}
  .topbar{gap:12px;min-height:60px}
  .brand{font-size:12px;letter-spacing:.12em}
  .theme{flex-shrink:0;margin-left:auto}
  .theme span{padding:5px 9px}
  .hero{padding:36px var(--gutter) 40px}
  .hero h1{font-size:clamp(40px,11vw,56px)}
  .button{width:100%}
  .band-section{padding-bottom:56px}
  .section{padding:60px var(--gutter)}
  h2{margin-bottom:28px}
  .prose-2{columns:1}
  .sub{font-size:26px;margin-top:44px}
  .figures{grid-template-columns:1fr;gap:20px}
  .waves{gap:28px;flex-wrap:wrap}
  .params,.roles{grid-template-columns:1fr;gap:24px}
  .timeline{grid-template-columns:1fr;gap:22px}
  .timeline li{padding-right:0}
  .specs{padding:22px 18px 4px}
  .spec-group dl div{grid-template-columns:1fr;gap:2px}
  .footer{flex-direction:column;gap:8px}
}
@media(max-width:380px){
  :root{--gutter:16px}
  .topbar{gap:8px}
  .brand{font-size:11px;letter-spacing:.06em}
  .brand span{padding:0 3px}
  .theme{font-size:11px}
  .theme span{padding:5px 7px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
  .band-seg{stroke-dashoffset:0!important}
}

/* Render gallery: the /quanta img-strip pattern on this page's tokens */
.gallery-note{color:var(--muted);font-size:14px;margin-bottom:28px}
.gal-strip{list-style:none;margin:0;padding:0 0 10px;display:flex;align-items:stretch;gap:8px;height:420px;overflow-x:auto;scroll-snap-type:x mandatory;scrollbar-width:thin;scrollbar-color:var(--line) transparent}
.gal-strip li{display:flex;flex:0 0 180px;min-width:180px;scroll-snap-align:start;transition:flex .55s var(--ease),min-width .55s var(--ease),opacity .35s}
.gal-strip li:hover,.gal-strip li:focus-within{flex-basis:360px;min-width:360px}
.gal-strip:has(li:hover) li:not(:hover){opacity:.45}
.gal-item{position:relative;flex:1;padding:0;border:0;border-radius:2px;overflow:hidden;background:var(--surface);cursor:zoom-in}
.gal-item img{width:100%;height:100%;object-fit:cover;transition:transform .55s var(--ease)}
.gal-item:hover img,.gal-item:focus-visible img{transform:scale(1.04)}
.gal-overlay{position:absolute;inset:auto 0 0 0;padding:40px 14px 12px;background:linear-gradient(to top,rgba(5,6,10,.82),transparent);color:#f4f4f7;font:400 13px/1.35 Inter,Arial,sans-serif;text-align:left;opacity:0;transition:opacity .25s}
.gal-item:hover .gal-overlay,.gal-item:focus-visible .gal-overlay{opacity:1}
.gal-item:focus-visible{outline:2px solid var(--accent);outline-offset:-2px}
.gal-lb{position:fixed;inset:0;z-index:40;display:flex;align-items:center;justify-content:center;background:rgba(5,6,10,.94)}
.gal-lb[hidden]{display:none}
.gal-lb.is-framed{position:absolute;inset:auto 0 auto 0}
.gal-lb__fig{margin:0;max-width:min(92vw,1600px);display:flex;flex-direction:column;align-items:center}
.gal-lb__fig img{max-width:100%;max-height:calc(100vh - 140px);width:auto;object-fit:contain}
.gal-lb__fig figcaption{color:#f4f4f7;font-size:13px;margin-top:12px;text-align:center;white-space:pre}
.gal-lb__close,.gal-lb__nav{position:absolute;display:flex;align-items:center;justify-content:center;border:1px solid rgba(244,244,247,.35);border-radius:50%;background:rgba(244,244,247,.08);color:#f4f4f7;cursor:pointer}
.gal-lb__close{top:18px;right:18px;width:44px;height:44px;font-size:22px}
.gal-lb__nav{top:50%;transform:translateY(-50%);width:48px;height:48px;font-size:26px}
.gal-lb__prev{left:18px}.gal-lb__next{right:18px}
.gal-lb__close:hover,.gal-lb__nav:hover{border-color:#6fc9e6}
@media(max-width:640px){
  .gal-strip{flex-wrap:wrap;height:auto;overflow-x:visible}
  .gal-strip li,.gal-strip li:hover,.gal-strip li:focus-within{flex:none;min-width:0;width:calc(50% - 4px);aspect-ratio:16/10}
  .gal-strip:has(li:hover) li:not(:hover){opacity:1}
  .gal-lb__nav{top:auto;bottom:18px;transform:none}
}
@media(prefers-reduced-motion:reduce){.gal-strip li,.gal-item img{transition:none}}

/* ===== A4 print (a4-print-doc standard + HANDOFF §8: one section per A4 page) ============
   Same DOM as the screen page. Night palette kept: the PDF is read on screens and forwarded.
   Videos are replaced by their poster frames; controls and chrome are hidden. */
.eof{display:none}
@media print{
  *{-webkit-print-color-adjust:exact!important;print-color-adjust:exact!important}
  @page{size:A4 portrait;margin:12mm 14mm 11mm 14mm}
  :root{--bg:#0a0b10;--surface:#14161d;--ink:#f4f4f7;--muted:#b4b6c0;--line:#353943;--hair:rgba(244,244,247,.14);--accent:#6fc9e6;--l638:#ff4a3a;--l525:#38f07a;--l450:#6f86ff}
  html,body{background:var(--bg)!important;color:var(--ink);font-size:9.5pt;line-height:1.55}
  .topbar,.skip,.footer,.button,.video-toggle,.sound,.theme,video{display:none!important}
  .print-only{display:block!important;width:100%;height:auto}
  .print-page{break-before:page;break-inside:avoid}
  .hero.print-page{break-before:auto}
  .hero{display:block;padding:0;max-width:none}
  .hero h1{font-size:34pt}
  .hero-lead{font-size:13pt;max-width:none;margin:14pt 0}
  .intro{margin-bottom:12pt}
  .hero-media{margin-top:10pt}
  .video-frame{aspect-ratio:auto;background:none}
  .band-section{padding:16pt 0 0;max-width:none}
  .band-seg{stroke-dashoffset:0!important}
  .section{max-width:none;padding:0;border-top:0;margin:0}
  h2{font-size:22pt;margin-bottom:12pt}
  h3{font-size:13pt}
  .sub{font-size:14pt;margin:14pt 0 6pt}
  p{margin-bottom:6pt;max-width:none}
  .prose{max-width:none}
  .prose-2{columns:2;column-gap:8mm}
  figcaption{font-size:7.5pt;margin-top:4pt}
  .wide,.programme-video,.band-photo{margin-top:8pt}
  .wide img,.programme-video .print-only{max-height:62mm;object-fit:cover}
  .figures{margin-top:10pt;padding-top:8pt;gap:6mm}
  .figures dd{font-size:24pt}
  .waves{margin-bottom:10pt;padding-bottom:8pt;gap:12mm}
  .waves dd{font-size:24pt}
  .params{gap:8pt 8mm;margin:10pt 0}
  .param{padding-top:6pt}.param h3{margin-bottom:4pt}.param p{font-size:9pt}
  .sculpture{display:block}
  .sculpture figure{margin-bottom:12pt}
  .sculpture img{max-height:95mm;object-fit:cover}
  .eng-grid{display:grid;grid-template-columns:1.35fr 1fr;gap:6mm}
  .specs{padding:9pt 10pt 2pt;margin-top:0;break-inside:avoid}
  .spec-group dl div{grid-template-columns:1fr;gap:0}
  .specs h3{font-size:12pt;margin-bottom:6pt}
  .spec-group{margin-bottom:6pt}
  .spec-group dl div{padding:3pt 0;font-size:8.5pt}
  .risk{padding:6pt 0 0;margin:4pt 0 8pt}
  .timeline{margin-top:14pt}
  .timeline li{padding-top:10pt}.timeline b{font-size:12pt}.timeline span{font-size:8.5pt}
  .price-line{margin-top:18pt;padding:12pt 0;font-size:16pt}
  .roles{gap:8mm;margin-bottom:12pt}
  .open{margin-bottom:14pt}.open li{margin-bottom:3pt}
  .gal-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:2mm;height:auto;overflow:visible}
  .gal-strip li{display:block;min-width:0}
  .gal-item{display:block;width:100%;aspect-ratio:16/10}
  .gal-overlay{opacity:1;padding:8pt 4pt 3pt;font-size:6.5pt}
  .gal-lb{display:none!important}
  .gallery-note{font-size:8.5pt;margin-bottom:8pt}
  .eof{display:block;margin-top:18pt;text-align:center;color:var(--muted);font:8pt/1.7 ui-monospace,SFMono-Regular,Menlo,monospace}
  .eof b{font-weight:600}
}