/* ============================================================
   Case study one-pager: luxury 3D web for a HK financial company
   Shared stylesheet for index-en.html / index-ru.html
   Palette: bg #D2D7DB, wall #efeee9, plaque #0b0b0b,
            paper #f2f2f2, gold #d4af37
   Luxury minimalism: Inter stack 300/400/500, uppercase headings
   with 0.14-0.22em tracking, glass panels, lots of air.
   ============================================================ */

:root{
  --bg:#D2D7DB;
  --wall:#efeee9;
  --ink:#0b0b0b;
  --ink-80:rgba(11,11,11,.8);
  --paper:#f2f2f2;
  --paper-dim:rgba(242,242,242,.62);
  --gold:#d4af37;
  --gold-text:#8a7118;
  --gold-soft:rgba(212,175,55,.16);
  --glass:rgba(251,250,247,.55);
  --glass-solid:rgba(251,250,247,.78);
  --line:rgba(11,11,11,.14);
  --line-soft:rgba(11,11,11,.08);
  --body:#20242a;
  --muted:#4d545c;
  --faint:#6a7076;
  --r-md:14px; --r-lg:20px;
  --shadow:0 1px 2px rgba(11,11,11,.04), 0 18px 44px -24px rgba(11,11,11,.18);
  --font:"Inter","Segoe UI",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-weight:400;
  font-size:16.5px;
  line-height:1.65;
  color:var(--body);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:var(--ink)}
a:hover{color:var(--gold-text)}
b,strong{font-weight:500;color:var(--ink)}

.wrap{max-width:1080px;margin:0 auto;padding:0 26px}

/* Uppercase luxury headings */
h1,h2,h3,h4{margin:0 0 .6em;color:var(--ink)}
h1{
  font-weight:300;text-transform:uppercase;
  letter-spacing:.14em;line-height:1.32;
  font-size:clamp(1.55rem,4vw,2.85rem);
}
h2{
  font-weight:400;text-transform:uppercase;
  letter-spacing:.16em;line-height:1.4;
  font-size:clamp(1.05rem,2.3vw,1.5rem);
}
h3{
  font-weight:500;text-transform:uppercase;
  letter-spacing:.14em;line-height:1.45;
  font-size:.92rem;
}
h4{
  font-weight:500;text-transform:uppercase;
  letter-spacing:.14em;line-height:1.5;
  font-size:.8rem;
}
p{margin:0 0 1em}
.lead{font-weight:300;font-size:1.06rem;color:var(--muted);max-width:50em}
.small{font-size:.85rem;font-weight:300;color:var(--faint)}

/* gold hairline under headings */
.rule{
  width:56px;height:1px;background:var(--gold);
  border:none;margin:22px 0 26px;
}

/* ---------- top bar: black plaque ---------- */
.topbar{
  position:sticky;top:0;z-index:60;
  background:var(--ink);
}
.topbar-in{
  display:flex;align-items:center;gap:22px;
  height:62px;max-width:1080px;margin:0 auto;padding:0 26px;
}
.brandmark{
  display:flex;align-items:center;gap:12px;
  color:var(--paper);text-decoration:none;
  font-size:.72rem;font-weight:500;
  text-transform:uppercase;letter-spacing:.22em;white-space:nowrap;
}
.brandmark:hover{color:var(--gold)}
.brandmark .dot{
  width:7px;height:7px;border-radius:50%;flex:0 0 auto;
  background:var(--gold);
}
.topnav{
  display:flex;gap:4px;overflow-x:auto;flex:1;
  scrollbar-width:none;
}
.topnav::-webkit-scrollbar{display:none}
.topnav a{
  font-size:.64rem;font-weight:400;
  text-transform:uppercase;letter-spacing:.18em;
  color:var(--paper-dim);text-decoration:none;
  padding:8px 11px;white-space:nowrap;
  border-bottom:1px solid transparent;
}
.topnav a:hover{color:var(--paper)}
.topnav a.active{color:var(--gold);border-bottom-color:var(--gold)}
.lang-switch{
  display:flex;align-items:center;flex:0 0 auto;
  border:1px solid rgba(242,242,242,.28);overflow:hidden;
}
.lang-switch a,.lang-switch span{
  font-size:.66rem;font-weight:500;letter-spacing:.16em;
  padding:5px 12px;text-decoration:none;
}
.lang-switch span{background:var(--gold);color:var(--ink)}
.lang-switch a{color:var(--paper-dim)}
.lang-switch a:hover{color:var(--paper);background:rgba(242,242,242,.08)}

/* ---------- hero ---------- */
.hero{
  padding:110px 0 74px;
  background:
    radial-gradient(760px 420px at 78% 8%, rgba(212,175,55,.14), transparent 62%),
    radial-gradient(640px 400px at 6% 100%, rgba(251,250,247,.5), transparent 60%),
    var(--bg);
}
.hero .eyebrow{margin-bottom:26px}
.hero .sub{
  font-weight:300;
  font-size:clamp(.98rem,1.5vw,1.12rem);
  color:var(--muted);
  max-width:44em;line-height:1.8;
}
.hero .sub b{font-weight:500;color:var(--ink)}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:34px}
.hero-tags span{
  font-size:.64rem;font-weight:400;
  text-transform:uppercase;letter-spacing:.14em;
  color:var(--muted);
  border:1px solid var(--line);
  padding:6px 14px;
  background:var(--glass);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
}

/* KPI strip: glass plates */
.kpi-strip{
  display:grid;
  grid-template-columns:repeat(5,1fr);
  gap:14px;
  margin:26px 0 0;
}
.kpi{
  background:var(--glass);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border:1px solid var(--line-soft);
  border-top:2px solid var(--gold);
  padding:22px 20px 18px;
  box-shadow:var(--shadow);
}
.kpi-num{
  font-size:1.9rem;font-weight:300;letter-spacing:.01em;line-height:1.05;
  color:var(--ink);white-space:nowrap;
}
.kpi-num small{font-size:.9rem;font-weight:400;color:var(--gold-text)}
.kpi-cap{
  font-size:.66rem;font-weight:400;color:var(--faint);
  text-transform:uppercase;letter-spacing:.12em;
  margin-top:10px;line-height:1.6;
}
@media (max-width:960px){.kpi-strip{grid-template-columns:repeat(3,1fr)}}
@media (max-width:600px){.kpi-strip{grid-template-columns:repeat(2,1fr)}.kpi-num{font-size:1.5rem}}

/* ---------- sections ---------- */
section.block{padding:104px 0 26px}
.eyebrow{
  display:flex;align-items:center;gap:14px;
  font-size:.66rem;font-weight:500;letter-spacing:.22em;text-transform:uppercase;
  color:var(--gold-text);margin-bottom:18px;
}
.eyebrow::before{content:"";width:34px;height:1px;background:var(--gold)}
.eyebrow .num{color:var(--faint);letter-spacing:.14em}

/* grids and cards */
.grid{display:grid;gap:16px}
.g2{grid-template-columns:1fr 1fr}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
@media (max-width:920px){.g3,.g4{grid-template-columns:1fr 1fr}}
@media (max-width:620px){.g2,.g3,.g4{grid-template-columns:1fr}}

.card{
  background:var(--glass);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border:1px solid var(--line-soft);
  padding:26px 26px 20px;
  box-shadow:var(--shadow);
}
.card h4{
  margin-bottom:.9em;
  padding-bottom:12px;
  border-bottom:1px solid var(--line-soft);
}
.card h4 i{font-style:normal;color:var(--gold-text);margin-right:8px}
.card p{font-size:.92rem;font-weight:300;color:var(--muted);margin-bottom:0;line-height:1.7}
.card p b{font-weight:500}

.card.dark{background:var(--ink);border-color:var(--ink)}
.card.dark h4{color:var(--paper);border-bottom-color:rgba(242,242,242,.16)}
.card.dark h4 i{color:var(--gold)}
.card.dark p{color:var(--paper-dim)}
.card.dark p b{color:var(--paper);font-weight:500}

/* fact rows */
.facts{display:flex;flex-wrap:wrap;gap:12px;margin:26px 0 8px}
.fact{
  background:var(--glass);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border:1px solid var(--line-soft);
  padding:14px 20px;min-width:132px;
  box-shadow:var(--shadow);
}
.fact b{
  display:block;font-size:1.35rem;font-weight:300;line-height:1.15;
  color:var(--ink);
}
.fact span{
  font-size:.62rem;font-weight:400;color:var(--faint);
  text-transform:uppercase;letter-spacing:.12em;line-height:1.5;
  display:block;margin-top:4px;
}

/* numbered steps */
.steps{list-style:none;counter-reset:st;margin:24px 0;padding:0;display:grid;gap:10px}
.steps li{
  counter-increment:st;
  background:var(--glass);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border:1px solid var(--line-soft);
  padding:16px 20px 16px 62px;position:relative;
  font-size:.92rem;font-weight:300;color:var(--muted);line-height:1.7;
  box-shadow:var(--shadow);
}
.steps li::before{
  content:counter(st,decimal-leading-zero);
  position:absolute;left:20px;top:18px;
  font-weight:400;font-size:.78rem;letter-spacing:.08em;
  color:var(--gold-text);
}
.steps li::after{
  content:"";position:absolute;left:20px;top:38px;width:20px;height:1px;
  background:var(--gold);
}
.steps li b{font-weight:500;color:var(--ink)}

/* chips */
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0}
.chips span{
  font-size:.66rem;font-weight:400;
  text-transform:uppercase;letter-spacing:.12em;
  color:var(--body);
  border:1px solid var(--line);
  padding:6px 13px;background:var(--glass);
}
.chips.gold span{border-color:rgba(212,175,55,.5);background:var(--gold-soft);color:var(--gold-text)}

/* callout */
.callout{
  border:1px solid var(--line-soft);
  border-left:2px solid var(--gold);
  background:var(--glass);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  padding:24px 28px;margin:28px 0;
  box-shadow:var(--shadow);
}
.callout h4{margin-bottom:.5em}
.callout p{margin-bottom:0;font-size:.95rem;font-weight:300;color:var(--muted)}
.callout .tag{
  display:inline-block;font-size:.6rem;font-weight:500;letter-spacing:.18em;text-transform:uppercase;
  color:var(--gold-text);border:1px solid rgba(212,175,55,.5);
  padding:3px 10px;margin-bottom:14px;background:var(--gold-soft);
}

/* ---------- diagrams ---------- */
.diagram{
  background:var(--glass-solid);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border:1px solid var(--line-soft);
  padding:22px;margin:30px 0;
  overflow-x:auto;
  box-shadow:var(--shadow);
}
.diagram svg{min-width:860px;width:100%;height:auto;display:block}
.diagram svg text{font-family:var(--font)}
.legend{
  display:flex;flex-wrap:wrap;gap:20px;margin:6px 2px 0;padding-top:16px;
  border-top:1px solid var(--line-soft);
  font-size:.66rem;font-weight:400;color:var(--faint);
  text-transform:uppercase;letter-spacing:.12em;
}
.legend i{
  display:inline-block;width:12px;height:12px;margin-right:8px;vertical-align:-1px;
}
.legend .k-gold i{background:var(--gold)}
.legend .k-ink i{background:var(--ink)}
.legend .k-wall i{background:var(--wall);border:1px solid var(--line)}
.legend .k-note i{background:transparent;border-bottom:1px dashed var(--faint);height:6px}

/* ---------- screenshots ---------- */
.shots{display:grid;gap:18px;grid-template-columns:1fr 1fr;margin:30px 0}
.shots.one{grid-template-columns:1fr}
@media (max-width:760px){.shots{grid-template-columns:1fr}}
.shot{
  margin:0;
  background:var(--glass-solid);
  border:1px solid var(--line-soft);
  overflow:hidden;
  box-shadow:var(--shadow);
}
.shot img{width:100%;height:auto}
.shot figcaption{
  font-size:.76rem;font-weight:300;color:var(--faint);
  padding:14px 20px;border-top:1px solid var(--line-soft);
  letter-spacing:.02em;
}
.shot.is-pending::before{
  content:attr(data-label);
  display:flex;align-items:center;justify-content:center;text-align:center;
  min-height:300px;padding:34px;
  font-weight:400;font-size:.72rem;
  text-transform:uppercase;letter-spacing:.2em;line-height:2;
  color:var(--faint);
  background:
    radial-gradient(360px 200px at 50% 42%, rgba(212,175,55,.16), transparent 70%),
    var(--wall);
}
.shot.is-pending figcaption::after{
  content:" · " attr(data-note);
  color:var(--gold-text);
}

/* ---------- divider ---------- */
.divider{
  height:1px;max-width:1080px;margin:80px auto 0;
  background:var(--line-soft);
  position:relative;
}
.divider::after{
  content:"";position:absolute;left:50%;top:0;width:46px;height:1px;
  transform:translateX(-50%);
  background:var(--gold);
}

/* ---------- method grid ---------- */
.method-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:18px}
@media (max-width:860px){.method-grid{grid-template-columns:1fr}}

/* ---------- CTA: black plaque ---------- */
.cta{
  background:
    radial-gradient(620px 320px at 88% -10%, rgba(212,175,55,.2), transparent 60%),
    var(--ink);
  color:var(--paper);
  padding:52px 54px;
  margin:44px 0 0;
  display:flex;flex-wrap:wrap;align-items:center;gap:30px;
  box-shadow:var(--shadow);
}
.cta .cta-txt{flex:1 1 380px}
.cta h3{
  color:var(--paper);font-size:1.05rem;letter-spacing:.2em;margin-bottom:.8em;
}
.cta h3::after{
  content:"";display:block;width:46px;height:1px;background:var(--gold);margin-top:14px;
}
.cta p{color:var(--paper-dim);margin:0;font-size:.95rem;font-weight:300;max-width:40em;line-height:1.8}
.cta .btn{
  display:inline-block;background:var(--gold);color:var(--ink);
  font-weight:500;font-size:.72rem;text-decoration:none;
  text-transform:uppercase;letter-spacing:.18em;
  padding:16px 32px;white-space:nowrap;
}
.cta .btn:hover{background:#c9a22e;color:var(--ink)}

/* ---------- footer ---------- */
footer{
  margin-top:84px;padding:36px 0 48px;
  background:var(--ink);
  font-size:.7rem;font-weight:300;color:var(--paper-dim);
  letter-spacing:.06em;
}
footer .wrap{display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between}

/* ---------- print ---------- */
@media print{
  :root{--bg:#fff;--shadow:none}
  body{font-size:12px;background:#fff}
  .topbar,.lang-switch{display:none!important}
  .hero{padding:40px 0 40px}
  section.block{padding:36px 0 8px;break-inside:auto}
  .card,.kpi,.callout,.shot,.diagram,.steps li,.fact{break-inside:avoid;box-shadow:none}
  .card.dark,.cta,footer{-webkit-print-color-adjust:exact;print-color-adjust:exact}
  .diagram{overflow:visible}
  .diagram svg{min-width:0}
  .cta{break-inside:avoid}
  a{text-decoration:none;color:inherit}
  .cta .btn::after{content:"  ->  linkedin.com/in/sedovkirill"}
  .shot.is-pending{display:none}
}