/* ═══ Tokens ══════════════════════════════════════════════════════════
   Dark-first: the committed world is a night plate. Light is the same
   chart printed on paper, not an inversion. */
:root{
  --void:#070A12; --plate:#0C111C; --raised:#121828; --rule:#1F2738;
  --ink:#E7EAF3; --dim:#8E97AC;
  --star:#E9C989;          /* theorem nodes, the one warm signal */
  --link:#7C9BDE;          /* relations between facts */
  --edge:rgba(124,155,222,.30);
  --node:rgba(231,234,243,.72);
  --sel:rgba(233,201,137,.22);
  --measure:68ch;
  --display:"Bodoni Moda",Didot,"Times New Roman",serif;
  --body:"Archivo","Helvetica Neue",Arial,sans-serif;
  --data:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  color-scheme:dark;
}
@media (prefers-color-scheme:light){
  :root:not([data-theme="dark"]){
    --void:#F3F1EA; --plate:#FAF9F4; --raised:#FFFFFF; --rule:#DCD8CC;
    --ink:#131722; --dim:#5C6376;
    --star:#8A5E15; --link:#33508F;
    --edge:rgba(51,80,143,.34); --node:rgba(19,23,34,.70);
    --sel:rgba(138,94,21,.20);
    color-scheme:light;
  }
}
:root[data-theme="light"]{
  --void:#F3F1EA; --plate:#FAF9F4; --raised:#FFFFFF; --rule:#DCD8CC;
  --ink:#131722; --dim:#5C6376;
  --star:#8A5E15; --link:#33508F;
  --edge:rgba(51,80,143,.34); --node:rgba(19,23,34,.70);
  --sel:rgba(138,94,21,.20);
  color-scheme:light;
}

*{box-sizing:border-box}
html{scrollbar-color:var(--rule) var(--void)}
body{margin:0;background:var(--void);color:var(--ink);font-family:var(--body);
  font-size:18px;line-height:1.62;-webkit-font-smoothing:antialiased;
  caret-color:var(--star)}
::selection{background:var(--sel);color:var(--ink)}
::-webkit-scrollbar{width:12px;height:12px}
::-webkit-scrollbar-track{background:var(--void)}
::-webkit-scrollbar-thumb{background:var(--rule);border:3px solid var(--void);border-radius:8px}
::-webkit-scrollbar-thumb:hover{background:var(--dim)}
a{color:inherit;text-underline-offset:.22em;text-decoration-thickness:1px}
:focus-visible{outline:2px solid var(--star);outline-offset:3px;border-radius:2px}
@media (prefers-reduced-motion:reduce){*{animation-duration:.01ms!important;transition-duration:.01ms!important}}

h1,h2,h3{font-family:var(--display);margin:0;text-wrap:balance}
.wrap{max-width:1180px;margin:0 auto;padding-inline:28px}
.ico{width:1em;height:1em;flex:none;stroke:currentColor;fill:none;
  stroke-width:1.75;stroke-linecap:round;stroke-linejoin:round}

/* ═══ Masthead ═══════════════════════════════════════════════════════ */
.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:30;
  background:color-mix(in srgb,var(--void) 86%,transparent);
  backdrop-filter:blur(14px);border-bottom:1px solid var(--rule)}
.top .wrap{display:flex;align-items:center;gap:22px;min-height:66px;flex-wrap:wrap}
.wordmark{font-family:var(--display);font-size:22px;font-weight:600;letter-spacing:.01em}
.wordmark i{font-style:normal;color:var(--star)}
.top nav{margin-left:auto;display:flex;align-items:center;gap:22px;flex-wrap:wrap}
.top nav a{font-size:16px;color:var(--dim);text-decoration:none}
.top nav a:hover{color:var(--ink)}
.theme{display:grid;place-items:center;width:36px;height:34px;padding:0;cursor:pointer;
  background:none;border:1px solid var(--rule);border-radius:4px;color:var(--dim);font-size:17px}
.theme:hover{color:var(--star);border-color:var(--star)}
.theme .sun{display:none} .theme .moon{display:block}
:root[data-theme="light"] .theme .sun,
html:not([data-theme]) .theme .sun{display:block}
:root[data-theme="light"] .theme .moon,
html:not([data-theme]) .theme .moon{display:none}
@media (prefers-color-scheme:dark){
  html:not([data-theme]) .theme .sun{display:none}
  html:not([data-theme]) .theme .moon{display:block}
}
.langs{display:flex;border:1px solid var(--rule);border-radius:4px;overflow:hidden}
.langs button{font-family:var(--body);font-size:14px;font-weight:500;background:none;
  border:0;color:var(--dim);padding:6px 11px;cursor:pointer}
.langs button+button{border-left:1px solid var(--rule)}
.langs button[aria-pressed="true"]{background:var(--star);color:var(--void)}

/* ═══ Hero: the graph the product actually builds ════════════════════ */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--rule)}
#sky{position:absolute;inset:0;width:100%;height:100%;display:block}
.hero::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(112% 82% at 18% 46%,var(--void) 24%,transparent 78%)}
.hero .wrap{position:relative;z-index:2;padding-block:132px 116px}
.hero h1{font-size:clamp(46px,7.4vw,96px);font-weight:600;line-height:.98;
  letter-spacing:-.035em;max-width:15ch}
.hero h1 em{font-style:italic;color:var(--star)}
.hero p{max-width:54ch;font-size:21px;color:var(--dim);margin:30px 0 0}
.acts{display:flex;gap:14px;flex-wrap:wrap;margin-top:40px}
.btn{display:inline-flex;align-items:center;gap:9px;font-size:17px;font-weight:500;
  text-decoration:none;padding:15px 26px;border-radius:4px;border:1px solid var(--rule);
  transition:border-color .2s,background .2s,color .2s}
.btn.key{background:var(--star);color:var(--void);border-color:var(--star)}
.btn.key:hover{background:transparent;color:var(--star)}
.btn.alt:hover{border-color:var(--ink)}

/* ═══ Measured facts ═════════════════════════════════════════════════ */
.readout{display:grid;grid-template-columns:repeat(4,1fr);border-bottom:1px solid var(--rule)}
.readout div{padding:30px 28px;border-left:1px solid var(--rule)}
.readout div:first-child{border-left:0}
.readout dt{font-size:14px;letter-spacing:.06em;text-transform:uppercase;color:var(--dim);margin:0 0 10px}
.readout dd{margin:0;font-family:var(--data);font-size:19px;font-weight:500;
  font-variant-numeric:tabular-nums;line-height:1.35}

/* ═══ Sections: the evaluation path, numbered because it is one ══════ */
section{border-bottom:1px solid var(--rule);
  scroll-margin-top:calc(env(safe-area-inset-top,0px) + 82px)}
.sec{display:grid;grid-template-columns:clamp(96px,11vw,168px) minmax(0,1fr);
  gap:0 clamp(28px,4vw,56px);padding-block:clamp(64px,9vw,112px);align-items:start}
.sec>*{min-width:0}
.pair>*{min-width:0}
.step{font-family:var(--display);font-size:clamp(68px,10vw,96px);font-weight:600;
  line-height:.82;letter-spacing:-.04em;color:color-mix(in srgb,var(--link) 26%,transparent);
  -webkit-text-stroke:1.5px var(--link);font-variant-numeric:lining-nums;
  position:sticky;top:calc(env(safe-area-inset-top,0px) + 96px)}
.sec h2{font-size:clamp(32px,4.6vw,54px);font-weight:600;line-height:1.04;
  letter-spacing:-.028em;margin-bottom:28px;max-width:17ch}
.sec p{max-width:var(--measure);margin:0 0 18px;color:var(--dim)}
.sec p:last-child{margin-bottom:0}
.sec p.open{color:var(--ink);font-size:21px}


/* ═══ Diagrams ═══════════════════════════════════════════════════════
   Dashes run along the connectors in the direction the data moves. The
   flow is the argument, so it is drawn, not described. */
.fig{margin:36px 0 0;max-width:none}
.fig svg{display:block;width:100%;max-width:100%;height:auto}
.fig svg.tall{display:none}
.fig figcaption{margin-top:18px;color:var(--dim);font-size:16.5px;max-width:var(--measure)}
.d-box{fill:var(--plate);stroke:var(--rule)}
.d-box-key{fill:var(--raised);stroke:var(--star)}
.d-label{fill:var(--ink);font-family:var(--body);font-size:15px;font-weight:500}
.d-note{fill:var(--dim);font-family:var(--body);font-size:13.5px}
.d-line{stroke:var(--link);fill:none;stroke-width:1.6}
.d-line-dim{stroke:var(--dim);fill:none;stroke-width:1.6}
.d-head{fill:var(--link)} .d-head-dim{fill:var(--dim)}
.d-peri{fill:none;stroke:var(--star);stroke-width:1.4}
.d-peri-open{fill:none;stroke:var(--dim);stroke-width:1.4;stroke-dasharray:7 7}
.d-node{fill:var(--star)} .d-node-dim{fill:var(--node)}
.d-edge{stroke:var(--edge);stroke-width:1.2;fill:none}
.flow{stroke-dasharray:7 9;animation:flow 1.5s linear infinite}
.flow-out{stroke-dasharray:7 9;animation:flow-out 1.5s linear infinite}
@keyframes flow{to{stroke-dashoffset:-16}}
@keyframes flow-out{to{stroke-dashoffset:-16}}
@media (prefers-reduced-motion:reduce){.flow,.flow-out{animation:none;stroke-dasharray:none}}
.pair{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:30px;margin-top:34px}
.pair h3{font-family:var(--body);font-size:18px;font-weight:600;margin:0 0 16px}
.pair .fig{margin:0}
.pair figcaption{font-size:16px;max-width:none}
@media (max-width:820px){
  .pair{grid-template-columns:1fr;gap:38px}
  .fig svg.wide{display:none}
  .fig svg.tall{display:block}
}

/* ═══ Guarantee: the load-bearing claim, so it runs against the grain ═ */
.vow{background:var(--plate)}
.vow .step{-webkit-text-stroke-color:var(--star);
  color:color-mix(in srgb,var(--star) 24%,transparent)}
.vow ol{list-style:none;margin:8px 0 0;padding:0;counter-reset:v}
.vow li{padding:26px 0;border-top:1px solid var(--rule);display:grid;
  grid-template-columns:minmax(0,1fr);gap:8px}
.vow li:last-child{border-bottom:1px solid var(--rule)}
.vow h3{font-family:var(--body);font-size:20px;font-weight:600;letter-spacing:-.01em}
.vow p{margin:0;max-width:66ch}

/* ═══ Provenance exhibit ═════════════════════════════════════════════ */
.plate{margin-top:30px;border:1px solid var(--rule);border-radius:6px;
  background:var(--plate);overflow:hidden;max-width:var(--measure)}
.plate header{display:flex;align-items:center;gap:10px;padding:14px 18px;
  border-bottom:1px solid var(--rule);font-size:14px;color:var(--dim)}
.plate header code{font-family:var(--data);color:var(--link)}
.plate pre{margin:0;padding:22px 18px;overflow-x:auto;font-family:var(--data);
  font-size:14.5px;line-height:1.8}
.f{color:var(--link)} .v{color:var(--star)} .n{color:var(--dim)}
.aside{display:flex;gap:12px;max-width:var(--measure);margin:20px 0 0;
  font-size:17px;color:var(--dim)}
.aside .ico{margin-top:.34em;color:var(--star);font-size:19px}

/* ═══ Fits: not four identical cards ═════════════════════════════════ */
.fits{display:grid;gap:0;margin-top:10px}
.fit{display:grid;grid-template-columns:minmax(0,22ch) minmax(0,1fr);
  gap:10px 36px;padding:26px 0;border-top:1px solid var(--rule)}
.fit:last-child{border-bottom:1px solid var(--rule)}
.fit h3{font-family:var(--body);font-size:19px;font-weight:600;letter-spacing:-.01em}
.fit p{margin:0;color:var(--dim);font-size:17px}
.hedge{max-width:var(--measure);margin:0 0 30px;color:var(--dim);font-size:17px}

/* ═══ Wiring ═════════════════════════════════════════════════════════ */
.wire{max-width:var(--measure)}
.wire div{display:grid;grid-template-columns:minmax(0,13ch) minmax(0,1fr);
  gap:22px;padding:19px 0;border-top:1px solid var(--rule);align-items:baseline}
.wire div:last-child{border-bottom:1px solid var(--rule)}
.wire dt{font-family:var(--data);font-size:15px;color:var(--link)}
.wire dd{margin:0;color:var(--dim);font-size:17px}

/* ═══ Pricing ════════════════════════════════════════════════════════ */
#pricing .wrap{max-width:1320px}
.lede{color:var(--dim);font-size:17px;margin:0;max-width:var(--measure)}
#pricing .sec{padding-bottom:clamp(30px,4vw,44px)}
#pricing .full{padding-bottom:clamp(64px,9vw,112px)}
.tiers{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;margin-bottom:56px}
.tier{border:1px solid var(--rule);border-radius:8px;background:var(--plate);
  padding:30px 26px;display:flex;flex-direction:column;gap:20px;position:relative}
.tier.pick{border-color:var(--star);background:var(--raised)}
.flag{position:absolute;top:-13px;left:24px;background:var(--star);color:var(--void);
  font-size:13px;font-weight:600;letter-spacing:.05em;text-transform:uppercase;
  padding:5px 12px;border-radius:4px}
.tier h3{font-family:var(--display);font-size:27px;font-weight:600;line-height:1.1}
.cost{font-family:var(--data);font-size:29px;font-weight:500;letter-spacing:-.03em;
  font-variant-numeric:tabular-nums;line-height:1.16;margin-top:12px}
.cost small{display:block;font-family:var(--body);font-size:16px;font-weight:400;
  color:var(--dim);letter-spacing:0;margin-top:7px}
.who{margin:0;color:var(--dim);font-size:16.5px;line-height:1.48}
.tier ul{list-style:none;margin:0;padding:0;display:grid;gap:12px;font-size:16.5px;line-height:1.45}
.tier li{display:grid;grid-template-columns:20px minmax(0,1fr);gap:10px;align-items:start}
.tier li .ico{margin-top:.26em;color:var(--star);font-size:15px}
.tier .btn{margin-top:auto;justify-content:center;font-size:16px;padding:13px 18px}
.grid-h{font-family:var(--display);font-size:26px;font-weight:600;margin:0 0 20px}
.scroll{overflow-x:auto;border:1px solid var(--rule);border-radius:8px;background:var(--plate)}
table{border-collapse:collapse;width:100%;min-width:660px}
th,td{padding:16px 20px;border-bottom:1px solid var(--rule);text-align:center;font-size:17px}
th:first-child,td:first-child{text-align:left}
thead th{font-size:16px;font-weight:600;color:var(--ink);font-family:var(--display)}
thead th.pick{color:var(--star)}
tbody th{font-weight:400;color:var(--dim);font-family:var(--body);font-size:17px}
tbody tr:last-child th,tbody tr:last-child td{border-bottom:0}
td{color:var(--dim);font-variant-numeric:tabular-nums}
td.on{color:var(--star)}
.oem{margin-top:40px;padding:28px 30px;border:1px solid var(--rule);border-radius:8px;
  max-width:var(--measure);background:var(--plate)}
.oem h3{font-family:var(--body);font-size:19px;font-weight:600;margin-bottom:11px}
.oem p{margin:0;color:var(--dim);font-size:17px}

/* ═══ FAQ ═══════════════════════════════════════════════════════════
   Ответы видны сразу: гармошка прячет ровно то, ради чего раздел заведён. */
.qa{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 clamp(28px,4vw,52px)}
.qa>div{min-width:0;padding:24px 0;border-top:1px solid var(--rule)}
.qa>div:nth-child(-n+2){border-top:0;padding-top:0}
.qa dt{font-family:var(--body);font-size:18px;font-weight:600;margin-bottom:9px;
  letter-spacing:-.01em}
.qa dd{margin:0;color:var(--dim);font-size:16.5px;line-height:1.55}
@media (max-width:820px){
  .qa{grid-template-columns:1fr}
  .qa>div:nth-child(2){border-top:1px solid var(--rule);padding-top:24px}
}

/* ═══ Foot ═══════════════════════════════════════════════════════════ */
footer{padding-block:48px 60px}
footer .wrap{display:flex;gap:18px 44px;flex-wrap:wrap;align-items:baseline;
  font-size:16px;color:var(--dim)}
footer strong{font-family:var(--display);font-size:19px;font-weight:600;color:var(--ink)}
footer a{color:var(--link)}

@media (max-width:1060px){ .tiers{grid-template-columns:repeat(2,minmax(0,1fr))} }
@media (max-width:860px){
  .readout{grid-template-columns:repeat(2,1fr)}
  .readout div:nth-child(3){border-left:0}
  .readout div:nth-child(n+3){border-top:1px solid var(--rule)}
  .fit{grid-template-columns:1fr;gap:6px}
}
@media (max-width:620px){
  body{font-size:17px}
  .sec{grid-template-columns:1fr;gap:18px}
  .step{position:static;font-size:64px}
  .tiers{grid-template-columns:1fr}
  .wire div{grid-template-columns:1fr;gap:5px}
  .hero .wrap{padding-block:84px 76px}
}