/* ===== База ===== */
:root{
  --paper:#faf7f1; --paper-2:#f2ecdf;
  --ink:#211d17; --soft:#6d6557; --faint:#a89f90; --line:#e3dbcc;
  --warm:#c25a33; --cold:#38618f;
  --serif:'Spectral',Georgia,'Times New Roman',serif;
  --sans:'Inter',-apple-system,'Segoe UI',Roboto,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
body{background:var(--paper);color:var(--ink);font:400 19.5px/1.78 var(--serif);-webkit-font-smoothing:antialiased;overflow-x:hidden}
::selection{background:var(--warm);color:var(--paper)}
body::after{content:"";position:fixed;inset:0;z-index:90;pointer-events:none;opacity:.05;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E")}

.progress{position:fixed;top:0;left:0;right:0;height:3px;z-index:100;pointer-events:none}
.progress i{display:block;height:100%;background:linear-gradient(90deg,var(--warm),var(--cold));transform:scaleX(0);transform-origin:left}

/* регистры смысла в тексте: тёплое = близость, холодное = даль, серое = вне отношения */
.w{color:var(--warm)}
.c{color:var(--cold)}
.g{color:#837b6a}
.js .w,.js .c,.js .g{transition:opacity .35s ease;cursor:pointer}
body[data-emph] .w,body[data-emph] .c,body[data-emph] .g{opacity:.35}
body[data-emph="w"] .w,body[data-emph="c"] .c,body[data-emph="g"] .g{opacity:1;text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:4px}
body[data-emph="w"] .fig-lab.lc,body[data-emph="w"] .fig-lab.lg,
body[data-emph="c"] .fig-lab.lw,body[data-emph="c"] .fig-lab.lg,
body[data-emph="g"] .fig-lab.lw,body[data-emph="g"] .fig-lab.lc{opacity:.14}

/* ===== Обложка ===== */
.hero{position:relative;min-height:100vh;min-height:100svh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;overflow:hidden;padding:2rem;background:#17140e;color:var(--paper)}
.hero-bg{position:absolute;inset:0;z-index:1;pointer-events:none;overflow:hidden;will-change:transform}
.hero-glow{position:absolute;left:50%;top:50%;width:62vmin;height:62vmin;border-radius:50%;filter:blur(60px);mix-blend-mode:screen}
.hero-glow.warm{margin:-31vmin 0 0 -46vmin;background:radial-gradient(circle at 60% 50%,rgba(194,90,51,.42),rgba(194,90,51,0) 68%);animation:breathe 11s ease-in-out infinite}
.hero-glow.cold{margin:-31vmin 0 0 -16vmin;background:radial-gradient(circle at 40% 50%,rgba(56,97,143,.46),rgba(56,97,143,0) 68%);animation:breathe 13s ease-in-out infinite reverse}
@keyframes breathe{0%,100%{opacity:.6;transform:scale(.96)}50%{opacity:.95;transform:scale(1.05)}}
.hero-seam{position:absolute;left:50%;top:0;bottom:0;width:1px;transform:translateX(-.5px);background:linear-gradient(180deg,rgba(250,247,241,0),rgba(250,247,241,.22) 40%,rgba(250,247,241,.22) 60%,rgba(250,247,241,0))}
.hero-ring{position:absolute;left:50%;top:50%;width:min(78vmin,620px);height:min(78vmin,620px);transform:translate(-50%,-50%)}
.hero-ring circle:first-child{transform-box:fill-box;transform-origin:center;animation:spin 80s linear infinite}
.hero-glyph{position:absolute;left:50%;bottom:6.4rem;transform:translate(-50%,0);width:clamp(26px,3.4vmin,40px);height:clamp(26px,3.4vmin,40px)}
.hero-glyph span{position:absolute;inset:0;border-radius:50%}
.hero-glyph .gh-warm{clip-path:polygon(0 0,50% 0,50% 100%,0 100%);background:var(--warm);box-shadow:0 0 18px rgba(194,90,51,.5)}
.hero-glyph .gh-cold{clip-path:polygon(50% 0,100% 0,100% 100%,50% 100%);background:var(--cold);box-shadow:0 0 18px rgba(56,97,143,.5)}
.hero-glyph .gh-halo{border:1px dashed rgba(250,247,241,.5);animation:spin 26s linear infinite}

.hero-inner{position:relative;z-index:2;max-width:760px;will-change:transform}
.kicker{font:600 12px/1 var(--sans);letter-spacing:.32em;text-transform:uppercase;color:var(--warm)}
.hero h1{font:300 clamp(3.4rem,11vw,7.8rem)/1.02 var(--serif);letter-spacing:-.02em;margin:.22em 0 .1em;color:var(--paper);text-wrap:balance;
  text-shadow:0 0 60px rgba(250,247,241,.12),-3px 0 24px rgba(194,90,51,.28),3px 0 24px rgba(56,97,143,.28)}
.hero .sub{font:italic 300 clamp(1.1rem,2.6vw,1.6rem)/1.35 var(--serif);color:#9fb3c8}
.hero .meta{margin-top:2.2rem;font:500 11.5px/1.7 var(--sans);letter-spacing:.2em;text-transform:uppercase;color:rgba(250,247,241,.46)}
.hero .meta::before{content:"";display:inline-block;width:5px;height:5px;border-radius:50%;background:var(--warm);margin-right:.7em;vertical-align:middle}

.langs{display:flex;gap:.05em;font:600 11px/1 var(--sans);letter-spacing:.2em}
.langs a{color:inherit;text-decoration:none;padding:.5em .7em;opacity:.4;transition:opacity .2s ease}
.langs a:hover,.langs a:focus-visible,.langs a[aria-current="page"]{opacity:1;outline:none}
.hero .langs{position:absolute;top:max(1.2rem,env(safe-area-inset-top));right:max(1.1rem,env(safe-area-inset-right));z-index:5;color:var(--paper)}
.apparatus .langs{margin-top:2.6rem;justify-content:center;color:var(--soft)}

.hint{position:absolute;bottom:1.9rem;left:50%;transform:translateX(-50%);z-index:3}
.hint i{display:block;width:1px;height:52px;background:rgba(250,247,241,.16);position:relative;overflow:hidden}
.hint i::after{content:"";position:absolute;left:0;top:-45%;width:100%;height:45%;background:var(--paper);animation:drop 1.9s cubic-bezier(.65,.05,.36,1) infinite}
@keyframes drop{to{top:115%}}

.js .hero .hero-inner>*{opacity:0;animation:fadeUp 1s ease forwards}
.js .hero .hero-inner .kicker{animation-delay:.15s}
.js .hero .hero-inner h1{animation-delay:.32s}
.js .hero .hero-inner .sub{animation-delay:.5s}
.js .hero .hero-inner .meta{animation-delay:.7s}
.js .hero .hero-bg .hero-ring{opacity:0;animation:ringIn 1.6s .25s ease forwards}
.js .hero .hero-bg .hero-glyph{opacity:0;animation:glyphIn 1s .9s ease forwards}
@keyframes ringIn{from{opacity:0;transform:translate(-50%,-50%) scale(.86)}to{opacity:1;transform:translate(-50%,-50%) scale(1)}}
@keyframes glyphIn{from{opacity:0;transform:translate(-50%,12px)}to{opacity:1;transform:translate(-50%,0)}}
@keyframes fadeUp{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}

/* ===== Сцены: текст эссе + sticky-схема ===== */
.scene{position:relative;max-width:1340px;margin:0 auto;padding:0 2.5rem 8vh;display:grid;grid-template-columns:minmax(320px,33rem) 1fr;gap:clamp(2rem,5vw,5rem);align-items:start;min-height:150vh}
/* без z-index: на мобильной раскладке текст должен уходить ПОД sticky-схему */
.scene-text{grid-column:1;position:relative;padding-top:36vh;padding-bottom:52vh}
.scene-text p{hyphens:auto;-webkit-hyphens:auto}
.scene-text p+p{margin-top:24vh}
.opening::first-letter{font-size:3.4em;line-height:.78;float:left;padding:.06em .13em 0 0;font-weight:500}
.scene-figure{grid-column:2;position:sticky;top:0;height:100vh;height:100svh;display:flex;align-items:center;justify-content:center;padding:4vh 0}
/* sticky сам создаёт контекст наложения: чтобы подписи схемы (.fig-ui) жили
   над канвой (#gl, z1), поднимаем весь контекст фигуры; фон при этом
   прозрачный — рисунок даёт канва, вырез которой закрашен «бумагой». */
.gl-active .scene-figure{z-index:3;background:transparent}
.scene-figure svg{width:min(100%,860px);max-height:78vh}

/* якоря в тексте: то, на что отвечает схема. Видны едва заметно;
   активный подсвечивается по мере чтения, hover/фокус — предпросмотр шага */
.a{color:inherit}
.js .a{cursor:pointer;text-decoration:underline;text-decoration-style:dotted;text-decoration-color:rgba(109,101,87,.42);text-decoration-thickness:1px;text-underline-offset:5px;border-radius:3px;box-decoration-break:clone;-webkit-box-decoration-break:clone;transition:background-color .5s ease,text-decoration-color .3s ease}
.js .a:hover,.js .a:focus-visible{text-decoration-style:solid;text-decoration-color:var(--soft);outline:none}
.js .a.is-live{background-color:rgba(194,90,51,.1)}

/* ===== Система состояний схем ===== */
.fx{transition:opacity .6s ease}
.js .fx{opacity:0}
.js .fx.is-on{opacity:1}
.js .fx.is-on.is-dim{opacity:.13}
.js .fx.draw{stroke-dasharray:1;stroke-dashoffset:1;transition:stroke-dashoffset 1.3s cubic-bezier(.45,0,.2,1),opacity .5s ease}
.js .fx.draw.is-on{stroke-dashoffset:0}
.js g.fx.draw{stroke-dasharray:none;stroke-dashoffset:0}
.js g.fx.draw path{stroke-dasharray:1;stroke-dashoffset:1;transition:stroke-dashoffset 1.3s cubic-bezier(.45,0,.2,1)}
.js g.fx.draw.is-on path{stroke-dashoffset:0}
.js .fx.grow{transform:scaleY(0);transform-box:fill-box;transform-origin:50% 100%;transition:transform .9s cubic-bezier(.2,.7,.2,1),opacity .5s ease}
.js .fx.grow.is-on{transform:scaleY(1)}

/* Глиф чужака: тёплая и холодная половины, пунктирный ореол */
.gl{fill:var(--warm)} .gr{fill:var(--cold)}
.gh{fill:none;stroke:var(--ink);stroke-width:1;stroke-dasharray:2 4;opacity:.55;transform-box:fill-box;transform-origin:center;animation:spin 26s linear infinite}
.stamp .gh{animation:none}
@keyframes spin{to{transform:rotate(360deg)}}

/* Надписи в схемах — дословные фрагменты эссе */
svg text{fill:var(--ink)}
.t-frag{font:italic 400 15px/1 var(--serif);letter-spacing:.01em}
.t-cap{font:600 11px/1 var(--sans);letter-spacing:.26em;text-transform:uppercase;fill:var(--soft)}
.t-warm{fill:var(--warm)} .t-cold{fill:var(--cold)} .t-gray{fill:var(--faint)} .t-soft{fill:var(--soft)}

/* ===== Особые движения схем ===== */
.js #fig1 .tail.is-on{animation:march 1.3s linear infinite}
@keyframes march{to{stroke-dashoffset:-14}}

#fig2 #c2c,#fig2 #c2far .dot{transition:fill 1s ease}
#fig2 #c2far{transition:transform 1.6s cubic-bezier(.25,.7,.2,1)}
.js #fig2 #c2far{transform:translate(672px,264px)}
.js #fig2[data-step="1"] #c2far,.js #fig2[data-step="2"] #c2far,.js #fig2[data-step="3"] #c2far{transform:translate(500px,264px)}
.js #fig2[data-step="1"] #c2c,.js #fig2[data-step="2"] #c2c,.js #fig2[data-step="3"] #c2c{fill:var(--cold)}
.js #fig2[data-step="1"] #c2far .dot,.js #fig2[data-step="2"] #c2far .dot,.js #fig2[data-step="3"] #c2far .dot{fill:var(--warm)}

#fig5 .world{transform-box:fill-box;transform-origin:center;transition:transform 1.3s cubic-bezier(.3,.6,.2,1)}
.js #fig5[data-step="3"] .world,.js #fig5[data-step="4"] .world{transform:translateY(56px) scaleY(.42)}
#fig5 #judge{transition:transform 1.3s cubic-bezier(.25,.7,.2,1)}
.js #fig5 #judge{transform:translate(400px,-44px)}
.js #fig5[data-step="1"] #judge,.js #fig5[data-step="2"] #judge{transform:translate(400px,280px)}
.js #fig5[data-step="3"] #judge,.js #fig5[data-step="4"] #judge{transform:translate(400px,135px)}

.ghost{filter:blur(1.6px)}
.js .ghost.is-on{opacity:.5;animation:gdrift var(--gd,12s) ease-in-out infinite alternate}
.js #fig7[data-step="2"] .ghost.is-on,.js #fig7[data-step="3"] .ghost.is-on{opacity:.85}
@keyframes gdrift{from{transform:translate(0,0)}to{transform:translate(var(--gx,24px),var(--gy,-20px))}}
.js #fig7[data-step="3"] .link{animation:flick 3.4s ease-in-out infinite}
@keyframes flick{0%,100%{opacity:1}50%{opacity:.45}}

/* ===== Сноски переводчика ===== */
.fn{font:600 .66em/0 var(--sans);color:var(--warm);cursor:help;position:relative;vertical-align:super}
.fn::after{content:attr(data-gloss);position:absolute;left:50%;bottom:160%;transform:translate(-50%,5px);background:var(--ink);color:var(--paper);font:400 12.5px/1.5 var(--sans);letter-spacing:0;text-transform:none;padding:.6em .9em;border-radius:8px;width:max-content;max-width:min(340px,92vw);white-space:normal;text-align:left;opacity:0;pointer-events:none;transition:opacity .16s ease-out,transform .16s ease-out;z-index:30;box-shadow:0 8px 28px rgba(33,29,23,.22)}
.fn:hover::after,.fn:focus-visible::after{opacity:1;transform:translate(-50%,0)}

/* ===== Формула ===== */
.formula{min-height:74vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:10vh 2rem;gap:.35em}
.f-line{font:300 clamp(2.5rem,7.4vw,5.4rem)/1.18 var(--serif);letter-spacing:-.02em}
.formula .f-line:nth-child(2){transition-delay:.16s}

/* ===== Гравюры ===== */
.plate{max-width:1060px;margin:12vh auto;padding:0 2.5rem}
.plate img{display:block;width:100%;height:auto;border:1px solid var(--ink);mix-blend-mode:multiply}
.plate-finale{max-width:760px;margin-top:0}

/* ===== Финал ===== */
.finale{min-height:70vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:16vh 2rem 10vh;max-width:900px;margin:0 auto}
.finale p{font:300 clamp(1.3rem,2.5vw,1.62rem)/1.72 var(--serif);max-width:44ch;text-wrap:balance}
.dual{font-weight:400}
@supports ((-webkit-background-clip:text) or (background-clip:text)){
  .dual{background:linear-gradient(90deg,var(--warm) 0 50%,var(--cold) 50% 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
}

/* ===== Аппарат ===== */
.apparatus{border-top:1px solid var(--line);max-width:720px;margin:14vh auto 0;padding:9vh 2rem 10vh}
.apparatus h2{font:600 11px/1 var(--sans);letter-spacing:.3em;text-transform:uppercase;color:var(--faint);margin-bottom:1.6rem}
.notes{padding-left:1.4rem;font-size:.86rem;line-height:1.62;color:var(--soft)}
.notes li{margin-bottom:.75rem}
.credit{margin-top:2.4rem;font-size:.86rem;color:var(--soft)}
.endmark{display:block;width:92px;height:auto;margin:4.5rem auto 0;mix-blend-mode:multiply}

/* ===== Reveal ===== */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .9s ease,transform .9s cubic-bezier(.2,.6,.2,1)}
.reveal.on{opacity:1;transform:none}
html:not(.js) .reveal{opacity:1;transform:none}

/* ===== Пространственный конспект: three.js поверх бумаги =====
   Одна канва на страницу; каждая схема — вырез (scissor) в ней.
   Слои: канва z1 → текст z2 → надстройка схемы z4 → зерно бумаги. */
#gl{position:fixed;inset:0;width:100%;height:100%;z-index:1;pointer-events:none}
.js .scene-figure.gl-on>svg{visibility:hidden}

/* надстройка схемы: нумерал, шаги, легенда, подписи, цитата шага */
.fig-ui{position:absolute;inset:0;z-index:4;pointer-events:none;font-family:var(--sans)}
.fig-head{position:absolute;top:3.4vh;left:2%;right:2%;display:flex;align-items:baseline;gap:1.1rem}
.fig-no{font:300 1.6rem/1 var(--serif);color:var(--soft)}
.fig-dots{display:inline-flex;gap:7px;align-items:center;transform:translateY(-3px)}
.fig-dots i{width:6px;height:6px;border-radius:50%;border:1px solid var(--faint);transition:background .4s ease,border-color .4s ease}
.fig-dots i.on{background:var(--ink);border-color:var(--ink)}
.fig-legend{margin-left:auto;display:inline-flex;gap:1.2em;pointer-events:auto}
.fig-legend span{font:500 10.5px/1 var(--sans);letter-spacing:.13em;text-transform:uppercase}
.fig-legend span::before{content:"";display:inline-block;width:7px;height:7px;border-radius:50%;background:currentColor;margin-right:.55em;vertical-align:1px}
.fig-labels{position:absolute;inset:0;overflow:hidden}
.fig-lab{position:absolute;top:0;left:0;font:italic 400 15px/1.35 var(--serif);color:var(--ink);white-space:nowrap;opacity:0;transition:opacity .6s ease;will-change:transform}
.fig-lab.is-on{opacity:1}
.fig-lab.is-on.is-dim{opacity:.13}
.fig-lab.lw{color:var(--warm)}
.fig-lab.lc{color:var(--cold)}
.fig-lab.lg{color:var(--faint)}
.fig-lab.lsoft{color:var(--soft)}
.fig-lab.lcap{font:600 11px/1 var(--sans);letter-spacing:.26em;text-transform:uppercase;color:var(--soft)}
.fig-cap{position:absolute;left:50%;bottom:4.6vh;transform:translateX(-50%);width:max-content;max-width:min(80%,48ch);text-align:center;font:italic 400 16.5px/1.5 var(--serif);color:var(--ink);opacity:.94;transition:opacity .24s ease}
.fig-cap.swap{opacity:0}
.fig-cap::before{content:"";display:block;width:34px;height:1px;background:var(--line);margin:0 auto .8em}

/* ===== Мобильные ===== */
@media(max-width:900px){
  body{font-size:17.5px}
  .hero{padding:4vh 1.4rem}
  .hero .langs{top:max(.85rem,env(safe-area-inset-top));right:max(.5rem,env(safe-area-inset-right))}
  .hero .meta{letter-spacing:.14em;padding:0 .4rem}
  .scene{display:flex;flex-direction:column;padding:0 0 12vh;gap:0;min-height:0}
  /* z-index держит sticky-схему над текстом (flex order меняет и порядок
     отрисовки). С WebGL фон снимается выше (.gl-active), бумагу в вырезе
     рисует канва, а контекст фигуры (z3 > канва z1) несёт подписи .fig-ui. */
  .scene-figure{order:-1;position:sticky;top:0;height:50vh;height:50svh;width:100%;padding:.7rem .65rem;background:var(--paper);border-bottom:1px solid var(--line);z-index:3}
  .gl-active .scene-figure{border-bottom:none}
  .gl-active .fig-ui{border-bottom:1px solid var(--line)}
  .scene-figure svg{max-height:42vh;max-height:42svh}
  .scene-text{padding:5vh 1.2rem 20vh}
  .scene-text p+p{margin-top:12vh}
  .plate{margin:9vh auto;padding:0 1.2rem}
  .finale{padding:12vh 1.4rem 6vh}
  .formula{padding:8vh 1.2rem;min-height:62vh}
  .f-line{font-size:clamp(1.85rem,9vw,2.8rem)}
  .apparatus{margin-top:8vh;padding-left:max(1.2rem,env(safe-area-inset-left));padding-right:max(1.2rem,env(safe-area-inset-right));padding-bottom:max(10vh,env(safe-area-inset-bottom))}
  .fig-head{top:.7rem;left:.75rem;right:.75rem;gap:.65rem}
  .fig-no{font-size:1.05rem}
  .fig-legend{display:none}
  .fig-lab{font-size:11.5px;white-space:normal;max-width:46%;line-height:1.25;text-align:center}
  .fig-lab.lcap{white-space:nowrap;max-width:none}
  .fig-cap{bottom:.65rem;font-size:12.5px;max-width:92%;width:auto;line-height:1.35;padding:0 .4rem}
  .fig-cap::before{margin-bottom:.4em}
  /* длинные сноски не уезжают за край экрана: якоримся к вьюпорту */
  .fn::after{position:fixed;left:1rem;right:1rem;bottom:max(1rem,env(safe-area-inset-bottom));top:auto;width:auto;max-width:none;transform:translateY(6px);border-radius:10px}
  .fn:hover::after,.fn:focus-visible::after{transform:none}
}

@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}