/* Layout: a quiet private-office page with an engineer's ledger. Left-aligned editorial column, a live "system status" ledger as hero, sections separated by hairlines. EN/RU switch swaps whole blocks. */
:root{
  --bg:#F2F4F3; --surface:#FFFFFF; --ink:#12262A; --muted:#566769; --line:#D5DCDB;
  --accent:#2C7673; --accent-soft:#E2EEEC; --brass:#8F6E3A;
  --ok:#2E7D57; --warn:#A06A1C;
  --display:"Bodoni Moda", "Didot", "Bodoni 72", Georgia, serif;
  --body:"Manrope", "Helvetica Neue", Arial, sans-serif;
  --mono:"IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --wrap:1120px;
}
@media (prefers-color-scheme: dark){ :root:not([data-theme="light"]){
  --bg:#0D191B; --surface:#132427; --ink:#E5EDEB; --muted:#93A6A6; --line:#24393C;
  --accent:#6DBDB6; --accent-soft:#17312F; --brass:#CDAA6E; --ok:#6CC499; --warn:#E0A955; color-scheme:dark } }
:root[data-theme="dark"]{
  --bg:#0D191B; --surface:#132427; --ink:#E5EDEB; --muted:#93A6A6; --line:#24393C;
  --accent:#6DBDB6; --accent-soft:#17312F; --brass:#CDAA6E; --ok:#6CC499; --warn:#E0A955; color-scheme:dark }

*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}}
body{background:var(--bg);color:var(--ink);font-family:var(--body);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}
#site[data-lang="en"] [lang="ru"], #site[data-lang="ru"] [lang="en"]{display:none!important}
.wrap{max-width:var(--wrap);margin:0 auto;padding-inline:clamp(16px,4vw,40px)}
a{color:inherit}
a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:2px}
h1,h2,h3{font-family:var(--display);font-weight:400;text-wrap:balance;margin:0;letter-spacing:-.01em}
p{margin:0}
.eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--brass)}
.lead{font-size:clamp(17px,1.6vw,19px);color:var(--muted);max-width:60ch}

/* header */
header.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:10;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-block:14px}
.mark{display:flex;align-items:baseline;gap:8px;text-decoration:none;min-width:0}
.mark b{font-family:var(--display);font-weight:500;font-size:24px;letter-spacing:.02em;white-space:nowrap}
.mark span{font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--muted)}
.nav ul{display:flex;gap:24px;list-style:none;margin:0;padding:0;font-size:14px}
.nav ul a{text-decoration:none;color:var(--muted)}
.nav ul a:hover{color:var(--ink)}
.nav-right{display:flex;align-items:center;gap:14px}
.lang{display:flex;border:1px solid var(--line);border-radius:2px}
.lang button{font:500 12px/1 var(--mono);letter-spacing:.1em;padding:9px 10px;background:transparent;color:var(--muted);border:0;cursor:pointer}
.lang button[aria-pressed="true"]{background:var(--ink);color:var(--bg)}
.btn{display:inline-flex;align-items:center;gap:8px;font:600 14px/1 var(--body);padding:12px 18px;border:1px solid var(--ink);background:var(--ink);color:var(--bg);text-decoration:none;cursor:pointer;border-radius:2px;transition:background .2s,color .2s}
.btn:hover{background:transparent;color:var(--ink)}
.btn.ghost{background:transparent;color:var(--ink)}
.btn.ghost:hover{background:var(--ink);color:var(--bg)}
@media (max-width:980px){.nav ul{display:none}}
@media (max-width:620px){.nav .btn,.mark span{display:none}}

/* hero */
.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(32px,5vw,72px);align-items:center;padding-block:clamp(48px,8vw,104px) clamp(48px,6vw,80px)}
.hero>*{min-width:0}
.hero h1{font-size:clamp(40px,6vw,76px);line-height:1.02;margin-block:18px 22px}
.hero h1 em{font-style:italic;color:var(--accent)}
.hero .cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
@media (max-width:900px){.hero{grid-template-columns:1fr}}

/* status ledger */
.ledger{background:var(--surface);border:1px solid var(--line);border-radius:3px;box-shadow:0 30px 60px -40px rgba(10,30,32,.35)}
.ledger-head{display:flex;justify-content:space-between;align-items:baseline;gap:12px;padding:16px 20px;border-bottom:1px solid var(--line)}
.ledger-head strong{font-family:var(--display);font-weight:500;font-size:19px}
.tag{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.row{display:grid;grid-template-columns:1fr auto;gap:4px 12px;padding:14px 20px;border-bottom:1px solid var(--line)}
.row:last-child{border-bottom:0}
.row .place{font-weight:600;font-size:15px}
.row .clock{font-family:var(--mono);font-size:14px;font-variant-numeric:tabular-nums;text-align:right}
.row .detail{grid-column:1/-1;display:flex;flex-wrap:wrap;gap:6px}
.chip{font-family:var(--mono);font-size:11.5px;padding:3px 8px;border-radius:20px;border:1px solid var(--line);color:var(--muted);white-space:nowrap}
.chip.ok{color:var(--ok);border-color:color-mix(in srgb,var(--ok) 40%,transparent)}
.chip.warn{color:var(--warn);border-color:color-mix(in srgb,var(--warn) 45%,transparent)}
.chip.ok::before,.chip.warn::before{content:"";display:inline-block;width:6px;height:6px;border-radius:50%;background:currentColor;margin-right:6px;vertical-align:1px}
.ledger-foot{padding:12px 20px;font-size:12.5px;color:var(--muted);background:var(--accent-soft)}

/* strip */
.strip{border-block:1px solid var(--line)}
.strip .wrap{display:grid;grid-template-columns:repeat(4,1fr)}
.strip .item{padding:26px 22px;border-right:1px solid var(--line);min-width:0}
.strip .item:first-child{padding-left:0}
.strip .item:last-child{border-right:0}
.strip .big{font-family:var(--display);font-size:34px;line-height:1}
.strip .small{font-size:14px;color:var(--muted);margin-top:8px}
@media (max-width:820px){.strip .wrap{grid-template-columns:1fr 1fr}.strip .item{border-right:0;padding-left:0;border-bottom:1px solid var(--line)}.strip .item:nth-last-child(-n+2){border-bottom:0}}

/* sections */
section.block{padding-block:clamp(56px,8vw,104px);border-bottom:1px solid var(--line)}
.sec-head{display:grid;grid-template-columns:260px 1fr;gap:32px;margin-bottom:44px}
.sec-head h2{font-size:clamp(30px,3.6vw,46px);line-height:1.08;margin-bottom:14px}
@media (max-width:820px){.sec-head{grid-template-columns:1fr;gap:10px}}

/* systems */
.systems{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--ink);background:var(--surface)}
.sys{padding:26px 24px;min-width:0;border-right:1px solid var(--line)}
.sys:last-child{border-right:0}
.sys .proto{font-family:var(--mono);font-size:22px;font-weight:500;letter-spacing:.02em;color:var(--accent)}
.sys .kind{font-size:13px;color:var(--muted);margin:4px 0 14px}
.sys ul{margin:0;padding:0;list-style:none;display:grid;gap:6px;font-size:14px}
.sys li{padding-left:16px;position:relative}
.sys li::before{content:"";position:absolute;left:0;top:.72em;width:7px;height:1px;background:var(--brass)}
@media (max-width:900px){.systems{grid-template-columns:1fr 1fr}.sys:nth-child(2){border-right:0}.sys:nth-child(-n+2){border-bottom:1px solid var(--line)}}
@media (max-width:560px){.systems{grid-template-columns:1fr}.sys{border-right:0;border-bottom:1px solid var(--line)}.sys:last-child{border-bottom:0}}
.sys-note{margin-top:22px;display:flex;flex-wrap:wrap;gap:8px}
.sys-note span{font-family:var(--mono);font-size:12px;padding:6px 10px;border:1px solid var(--line);border-radius:2px;color:var(--muted)}

.audience{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line)}
.audience div{padding:22px 22px 4px 0;min-width:0}
.audience h3{font-size:22px;margin-bottom:8px}
.audience p{font-size:15px;color:var(--muted)}
@media (max-width:900px){.audience{grid-template-columns:1fr 1fr;gap:12px 24px}}
@media (max-width:520px){.audience{grid-template-columns:1fr}}

.services{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.svc{background:var(--bg);padding:28px 26px;min-width:0}
.svc h3{font-size:23px;margin-bottom:10px}
.svc p{font-size:15px;color:var(--muted)}
.svc ul{margin:14px 0 0;padding:0;list-style:none;font-family:var(--mono);font-size:12.5px;color:var(--ink);display:grid;gap:4px}
.svc li::before{content:"— ";color:var(--brass)}
@media (max-width:900px){.services{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.services{grid-template-columns:1fr}}

/* report */
.report{background:var(--surface);border:1px solid var(--line);border-radius:3px;overflow:hidden}
.report-top{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;padding:22px 26px;border-bottom:1px solid var(--line)}
.report-top h3{font-size:24px}
.report-top .meta{font-family:var(--mono);font-size:12.5px;color:var(--muted);text-align:right}
.report-grid{display:grid;grid-template-columns:1.3fr 1fr}
.report-grid>div{padding:22px 26px;min-width:0}
.report-grid>div+div{border-left:1px solid var(--line)}
@media (max-width:820px){.report-grid{grid-template-columns:1fr}.report-grid>div+div{border-left:0;border-top:1px solid var(--line)}}
.tbl-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:14px;font-variant-numeric:tabular-nums}
th{font-family:var(--mono);font-weight:500;font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);text-align:left;padding:0 10px 10px 0;border-bottom:1px solid var(--line)}
td{padding:10px 10px 10px 0;border-bottom:1px solid var(--line);vertical-align:top}
td.num,th.num{text-align:right;font-family:var(--mono);white-space:nowrap;padding-right:0}
tr.total td{border-bottom:0;font-weight:600}
.log{list-style:none;margin:0;padding:0;display:grid;gap:14px;font-size:14px}
.log li{display:grid;grid-template-columns:58px 1fr;gap:10px}
.log time{font-family:var(--mono);font-size:12px;color:var(--brass);padding-top:2px}
.note{font-size:13px;color:var(--muted);margin-top:14px}

/* photos */
.photo{margin:0;display:grid;gap:10px;min-width:0}
.frame{overflow:hidden;border-radius:2px;background:var(--line);max-width:100%}
.frame img{display:block;width:100%;height:100%;object-fit:cover}
.photo figcaption{font-family:var(--mono);font-size:12px;letter-spacing:.04em;color:var(--muted)}
.band{padding-bottom:clamp(48px,6vw,80px)}
.band .frame{aspect-ratio:21/9}
@media (max-width:620px){.band .frame{aspect-ratio:4/3}}
.trio{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:28px}
.trio .frame{aspect-ratio:4/5}
.duo{display:grid;grid-template-columns:1.2fr 1fr;gap:16px;margin-top:40px}
.duo .frame{height:clamp(220px,30vw,400px)}
@media (max-width:720px){.trio,.duo{grid-template-columns:1fr}.trio .frame{aspect-ratio:4/3}}

/* comparison */
.compare{background:var(--surface);border:1px solid var(--line);padding:6px 26px 10px}
.compare table{font-size:15px;min-width:620px}
.compare th{padding-top:18px}
.compare td{padding-block:16px}
.compare td:first-child{font-family:var(--mono);font-size:12.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);width:22%}
.compare td:nth-child(2){color:var(--muted);width:34%}
.compare td:last-child{font-weight:500}
.compare th:last-child{color:var(--accent)}
.compare tr:last-child td{border-bottom:0}

/* process */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:28px}
.step{border-top:2px solid var(--ink);padding-top:18px;min-width:0}
.step .n{font-family:var(--mono);font-size:12px;color:var(--brass);letter-spacing:.1em}
.step h3{font-size:22px;margin:8px 0}
.step p{font-size:15px;color:var(--muted)}
.step .when{font-family:var(--mono);font-size:12px;margin-top:10px;color:var(--accent)}
@media (max-width:900px){.steps{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.steps{grid-template-columns:1fr}}

/* tiers */
.tiers{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.tier{border:1px solid var(--line);padding:28px 26px;display:flex;flex-direction:column;gap:12px;min-width:0;background:var(--bg)}
.tier.feature{background:var(--surface);border-color:var(--ink)}
.tier h3{font-size:28px}
.tier .fit{font-family:var(--mono);font-size:12.5px;color:var(--accent)}
.tier ul{margin:4px 0 0;padding:0;list-style:none;display:grid;gap:7px;font-size:14.5px}
.tier li{padding-left:18px;position:relative}
.tier li::before{content:"";position:absolute;left:0;top:.7em;width:8px;height:1px;background:var(--brass)}
@media (max-width:900px){.tiers{grid-template-columns:1fr}}
.oneoff{margin-top:28px;display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line)}
.oneoff div{padding:18px 20px 0 0;min-width:0}
.oneoff b{font-family:var(--display);font-weight:500;font-size:19px;display:block;margin-bottom:4px}
.oneoff span{font-size:14px;color:var(--muted)}
@media (max-width:700px){.oneoff{grid-template-columns:1fr}}

/* regions */
.regions{display:grid;grid-template-columns:repeat(5,1fr);border-top:1px solid var(--line)}
.region{padding:22px 20px 0 0;min-width:0}
.region .code{font-family:var(--mono);font-size:12px;color:var(--brass);letter-spacing:.12em}
.region h3{font-size:24px;margin:6px 0 8px}
.region p{font-size:14.5px;color:var(--muted)}
@media (max-width:900px){.regions{grid-template-columns:1fr 1fr;gap:8px 24px}}
@media (max-width:520px){.regions{grid-template-columns:1fr}}

/* partners */
.two{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,64px)}
.two>*{min-width:0}
.two h2{font-size:clamp(30px,3.6vw,46px);line-height:1.08;margin:14px 0 18px}
@media (max-width:820px){.two{grid-template-columns:1fr}}
.plist{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.plist li{padding:18px 0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:190px 1fr;gap:16px}
.plist b{font-weight:600}
.plist span{color:var(--muted);font-size:15px}
@media (max-width:560px){.plist li{grid-template-columns:1fr;gap:4px}}

/* contact */
.contact{padding-block:clamp(64px,9vw,120px)}
.contact h2{font-size:clamp(34px,5vw,62px);line-height:1.05;max-width:18ch;margin:16px 0 20px}
.mailbox{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:30px}
.mail{font-family:var(--display);font-size:clamp(24px,3.4vw,38px);user-select:all;border-bottom:1px solid var(--accent);padding-bottom:2px;overflow-wrap:anywhere}
.copied{font-family:var(--mono);font-size:12px;color:var(--ok)}
.brief{margin-top:34px;display:grid;grid-template-columns:repeat(3,1fr);gap:20px;max-width:900px}
.brief div{border-left:1px solid var(--brass);padding-left:14px;font-size:14.5px;color:var(--muted)}
.brief b{display:block;color:var(--ink);font-weight:600;margin-bottom:2px}
@media (max-width:700px){.brief{grid-template-columns:1fr}}

footer{border-top:1px solid var(--line);padding-block:26px;font-size:13px;color:var(--muted)}
footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px}