/* ============================================================
   Case study one-pager: production planning for an apparel seller
   Shared stylesheet for index-en.html / index-ru.html
   Brand: engineering blue #0B6DB8 / #063E7F, cool bg #F7FAFD,
   dark navy #10243A, traffic light #2f8f5b / #b8860b / #c0392b
   Font: Montserrat stack (no external requests)
   ============================================================ */

:root{
  --dark:#10243A;
  --dark-900:#081827;
  --dark-700:#26405c;
  --dark-300:#7d90a5;
  --dark-100:#c6d7e6;
  --dark-050:#e4eef7;
  --accent:#0B6DB8;
  --accent-strong:#063E7F;
  --accent-soft:#EAF4FC;
  --accent-100:#c9dcee;
  --success:#2f8f5b;
  --success-bg:#eaf6ef;
  --warning:#b8860b;
  --warning-bg:#fdf6e3;
  --danger:#c0392b;
  --danger-bg:#fdeeec;
  --bg:#F7FAFD;
  --card:#ffffff;
  --line:#d7e5f1;
  --text:#1C2733;
  --muted:#5A6675;
  --muted-2:#7d90a5;
  --r-sm:10px; --r-md:14px; --r-lg:18px; --r-xl:24px;
  --shadow:0 1px 2px rgba(16,39,64,.05), 0 10px 30px -14px rgba(16,39,64,.14);
  --shadow-lg:0 2px 4px rgba(16,39,64,.06), 0 24px 60px -24px rgba(16,39,64,.22);
  --font:"Montserrat","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-size:16.5px;
  line-height:1.62;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:var(--accent-strong)}
a:hover{color:var(--accent)}

.wrap{max-width:1120px;margin:0 auto;padding:0 24px}

h1,h2,h3,h4{line-height:1.18;margin:0 0 .5em;font-weight:800;letter-spacing:-.015em}
h2{font-size:clamp(1.66rem,3.2vw,2.3rem)}
h3{font-size:1.26rem;font-weight:800}
h4{font-size:1rem;font-weight:800}
p{margin:0 0 1em}
strong{font-weight:800}

.lead{font-size:1.11rem;color:var(--muted);max-width:52em}
.small{font-size:.87rem;color:var(--muted)}

/* ---------- top nav ---------- */
.topbar{
  position:sticky;top:0;z-index:50;
  background:rgba(247,250,253,.88);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.topbar-in{
  display:flex;align-items:center;gap:18px;
  height:60px;max-width:1120px;margin:0 auto;padding:0 24px;
}
.brandmark{
  display:flex;align-items:center;gap:10px;
  font-weight:800;font-size:.95rem;white-space:nowrap;color:var(--text);text-decoration:none;
}
.brandmark .dot{
  width:26px;height:26px;border-radius:8px;flex:0 0 auto;
  background:linear-gradient(135deg,var(--dark) 55%,var(--dark-700));
  position:relative;
}
.brandmark .dot::after{
  content:"";position:absolute;right:4px;bottom:4px;width:8px;height:8px;border-radius:3px;background:var(--accent);
}
.topnav{
  display:flex;gap:2px;overflow-x:auto;flex:1;
  scrollbar-width:none;
}
.topnav::-webkit-scrollbar{display:none}
.topnav a{
  font-size:.82rem;font-weight:700;color:var(--muted);text-decoration:none;
  padding:7px 11px;border-radius:999px;white-space:nowrap;
}
.topnav a:hover{color:var(--text);background:var(--dark-050)}
.topnav a.active{color:var(--accent-strong);background:var(--accent-soft);box-shadow:inset 0 0 0 1px var(--accent-100)}
.lang-switch{
  display:flex;align-items:center;gap:0;flex:0 0 auto;
  border:1px solid var(--line);border-radius:999px;overflow:hidden;background:#fff;
}
.lang-switch a,.lang-switch span{
  font-size:.8rem;font-weight:800;padding:5px 12px;text-decoration:none;letter-spacing:.04em;
}
.lang-switch span{background:var(--dark);color:#fff}
.lang-switch a{color:var(--muted)}
.lang-switch a:hover{color:var(--text);background:var(--dark-050)}

/* ---------- hero ---------- */
.hero{
  background:
    radial-gradient(900px 500px at 88% -10%, rgba(249,115,22,.30), transparent 60%),
    radial-gradient(700px 420px at -10% 115%, rgba(219,95,8,.20), transparent 55%),
    var(--dark);
  color:#fff;
  padding:76px 0 150px;
  position:relative;
}
.hero .eyebrow{color:var(--accent)}
.hero .eyebrow::before{background:var(--accent)}
.hero h1{
  font-size:clamp(2rem,4.5vw,3.25rem);
  max-width:20em;
  color:#fff;
  margin-bottom:.45em;
}
.hero .sub{
  font-size:clamp(1rem,1.6vw,1.2rem);
  color:var(--dark-100);
  max-width:47em;
  line-height:1.66;
}
.hero .sub b{color:#fff;font-weight:800}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:26px}
.hero-tags span{
  font-size:.79rem;font-weight:700;color:var(--dark-050);
  border:1px solid rgba(255,255,255,.22);border-radius:999px;padding:5px 13px;
  background:rgba(255,255,255,.05);
}

/* KPI strip overlapping hero bottom */
.kpi-strip{
  display:grid;
  grid-template-columns:repeat(6,1fr);
  gap:14px;
  margin-top:-86px;
  position:relative;z-index:2;
}
.kpi{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:20px 18px 16px;
  box-shadow:var(--shadow);
  border-bottom:3px solid var(--accent);
}
.kpi-num{
  font-size:1.66rem;font-weight:800;letter-spacing:-.02em;line-height:1.05;
  color:var(--text);white-space:nowrap;
}
.kpi-num small{font-size:.92rem;font-weight:800;color:var(--accent-strong)}
.kpi-cap{font-size:.79rem;color:var(--muted);margin-top:7px;line-height:1.4}
@media (max-width:980px){.kpi-strip{grid-template-columns:repeat(3,1fr)}}
@media (max-width:560px){.kpi-strip{grid-template-columns:repeat(2,1fr)}.kpi-num{font-size:1.38rem}}

/* ---------- sections ---------- */
section.block{padding:84px 0 10px}
section.block.alt{background:var(--card);border-block:1px solid var(--line);margin-top:40px;padding-bottom:60px}
.eyebrow{
  display:flex;align-items:center;gap:10px;
  font-size:.8rem;font-weight:800;letter-spacing:.14em;text-transform:uppercase;
  color:var(--accent-strong);margin-bottom:14px;
}
.eyebrow::before{content:"";width:26px;height:3px;border-radius:2px;background:var(--accent)}
.eyebrow .num{color:var(--muted-2);letter-spacing:.06em}

/* cards / grids */
.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:900px){.g3,.g4{grid-template-columns:1fr 1fr}}
@media (max-width:620px){.g2,.g3,.g4{grid-template-columns:1fr}}

.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:22px 22px 18px;
  box-shadow:var(--shadow);
}
.card h4{margin-bottom:.45em}
.card p{font-size:.93rem;color:var(--muted);margin-bottom:0}
.card.accent{border-top:3px solid var(--accent)}
.card.ink{background:var(--dark);border-color:var(--dark-700);color:#fff}
.card.ink h4{color:#fff}
.card.ink p{color:var(--dark-100)}

/* zone accent cards for the TOC block */
.card.z-red{border-top:3px solid var(--danger)}
.card.z-yellow{border-top:3px solid var(--warning)}
.card.z-green{border-top:3px solid var(--success)}
.card.z-black{border-top:3px solid var(--dark)}

/* fact rows (inline stats) */
.facts{
  display:flex;flex-wrap:wrap;gap:12px;margin:22px 0 8px;
}
.fact{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);
  padding:12px 18px;box-shadow:var(--shadow);
  min-width:128px;
}
.fact b{display:block;font-size:1.28rem;font-weight:800;letter-spacing:-.01em;line-height:1.15}
.fact b i{font-style:normal;color:var(--accent-strong)}
.fact span{font-size:.77rem;color:var(--muted)}

/* callouts */
.callout{
  border-radius:var(--r-lg);
  padding:22px 26px;
  margin:26px 0;
  border:1px solid var(--line);
  background:var(--card);
  box-shadow:var(--shadow);
}
.callout.soft{background:var(--accent-soft);border-color:var(--accent-100)}
.callout.green{background:var(--success-bg);border-color:#cfe6d8}
.callout h4{margin-bottom:.35em}
.callout p{margin-bottom:0;font-size:.96rem}
.callout .tag{
  display:inline-block;font-size:.72rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase;
  background:#fff;border:1px solid var(--accent-100);color:var(--accent-strong);
  border-radius:999px;padding:3px 10px;margin-bottom:10px;
}

/* chips */
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0}
.chips span{
  font-size:.81rem;font-weight:700;color:var(--text);
  background:#fff;border:1px solid var(--line);border-radius:999px;padding:5px 13px;
}
.chips.warn span{border-color:var(--accent-100);background:var(--accent-soft);color:var(--accent-strong)}

/* numbered steps */
.steps{list-style:none;counter-reset:st;margin:20px 0;padding:0;display:grid;gap:10px}
.steps li{
  counter-increment:st;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);
  padding:14px 18px 14px 58px;position:relative;font-size:.94rem;
  box-shadow:var(--shadow);
}
.steps li::before{
  content:counter(st,decimal-leading-zero);
  position:absolute;left:16px;top:14px;
  font-weight:800;font-size:.85rem;color:var(--accent-strong);
  background:var(--accent-soft);border-radius:8px;padding:2px 7px;
}
.steps li b{font-weight:800}

/* plain timeline list (nightly conveyor) */
.timeline{list-style:none;margin:20px 0;padding:0;display:grid;gap:8px}
.timeline li{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);
  padding:11px 16px;font-size:.92rem;box-shadow:var(--shadow);
  display:flex;gap:14px;align-items:baseline;
}
.timeline li b.t{
  flex:0 0 auto;font-weight:800;color:var(--accent-strong);
  font-variant-numeric:tabular-nums;min-width:52px;
}

/* ---------- diagrams ---------- */
.diagram{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-xl);
  padding:18px;
  margin:26px 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:18px;margin:4px 4px 2px;padding-top:14px;
  border-top:1px dashed var(--line);
  font-size:.8rem;color:var(--muted);
}
.legend i{
  display:inline-block;width:14px;height:14px;border-radius:4px;margin-right:6px;vertical-align:-2px;
}
.legend .k-ext i{background:var(--dark)}
.legend .k-svc i{background:#fff;border:2px solid var(--accent-strong)}
.legend .k-db i{background:var(--accent-soft);border:2px solid var(--accent)}
.legend .k-hum i{background:var(--success-bg);border:2px solid var(--success)}
.legend .k-warn i{background:var(--warning-bg);border:2px solid var(--warning)}
.legend .k-red i{background:var(--danger-bg);border:2px solid var(--danger)}

/* ---------- tables ---------- */
.tbl-wrap{overflow-x:auto;margin:24px 0;border-radius:var(--r-lg);border:1px solid var(--line);box-shadow:var(--shadow);background:var(--card)}
table.tbl{
  width:100%;border-collapse:collapse;font-size:.91rem;min-width:640px;
}
table.tbl th{
  text-align:left;font-size:.75rem;letter-spacing:.08em;text-transform:uppercase;
  color:var(--muted-2);font-weight:800;
  padding:14px 18px 10px;border-bottom:2px solid var(--dark-050);
  background:#fdfaf6;
}
table.tbl td{
  padding:13px 18px;border-bottom:1px solid var(--line);vertical-align:top;
}
table.tbl tr:last-child td{border-bottom:none}
table.tbl td.metric{font-weight:800;white-space:nowrap}
table.tbl code{
  font-family:Consolas,"Cascadia Mono",Menlo,monospace;font-size:.82em;
  background:var(--dark-050);border-radius:6px;padding:2px 6px;color:var(--text);
  white-space:normal;
}

/* alert-type table: colored dot per row */
td .adot{
  display:inline-block;width:10px;height:10px;border-radius:50%;
  margin-right:9px;vertical-align:0;
}
.adot.red{background:var(--danger)}
.adot.yellow{background:var(--warning)}
.adot.green{background:var(--success)}

/* was / now table */
table.tbl.wasnow td:nth-child(2){color:var(--muted)}
table.tbl.wasnow td:nth-child(3){font-weight:700}
table.tbl.wasnow td:nth-child(3) b{color:var(--accent-strong)}

/* formula strip */
.formula{
  background:var(--dark);color:#fff;border-radius:var(--r-lg);
  padding:20px 26px;margin:24px 0;box-shadow:var(--shadow);
  font-weight:700;font-size:clamp(.92rem,1.7vw,1.08rem);
  overflow-x:auto;white-space:nowrap;
}
.formula b{color:var(--accent);font-weight:800}
.formula .dim{color:var(--dark-300);font-weight:600}
.formula-note{font-size:.85rem;color:var(--muted);margin-top:-14px;margin-bottom:22px}

/* ---------- screenshots ---------- */
.shots{display:grid;gap:18px;grid-template-columns:1fr 1fr;margin:26px 0}
.shots.one{grid-template-columns:1fr}
@media (max-width:760px){.shots{grid-template-columns:1fr}}
.shot{
  margin:0;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow);
}
.shot img{width:100%;height:auto}
.shot figcaption{
  font-size:.82rem;color:var(--muted);padding:12px 18px;border-top:1px solid var(--line);
}
.shot.is-pending::before{
  content:attr(data-label);
  display:flex;align-items:center;justify-content:center;text-align:center;
  min-height:300px;padding:30px;
  font-weight:800;font-size:1.02rem;color:var(--accent-strong);
  background:
    radial-gradient(420px 210px at 50% 0%, rgba(249,115,22,.12), transparent 70%),
    repeating-linear-gradient(-45deg, #f8f1e8 0 14px, #f3ebdf 14px 28px);
}
.shot.is-pending figcaption::after{
  content:" · " attr(data-note);
  color:var(--muted-2);
}

/* ---------- section divider ---------- */
.divider{height:1px;background:var(--line);margin:74px auto 0;max-width:1120px}

/* ---------- methodology ---------- */
.method-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:18px}
@media (max-width:860px){.method-grid{grid-template-columns:1fr}}

/* ---------- CTA ---------- */
.cta{
  background:
    radial-gradient(700px 380px at 90% -20%, rgba(249,115,22,.34), transparent 60%),
    radial-gradient(520px 300px at 0% 120%, rgba(219,95,8,.22), transparent 55%),
    var(--dark);
  border-radius:var(--r-xl);
  color:#fff;
  padding:46px 48px;
  margin:40px 0 0;
  display:flex;flex-wrap:wrap;align-items:center;gap:28px;
  box-shadow:var(--shadow-lg);
}
.cta .cta-txt{flex:1 1 380px}
.cta h3{color:#fff;font-size:1.55rem;margin-bottom:.35em}
.cta p{color:var(--dark-100);margin:0;font-size:.98rem;max-width:40em}
.cta .btn{
  display:inline-block;background:var(--accent);color:#fff;
  font-weight:800;font-size:1rem;text-decoration:none;
  border-radius:999px;padding:14px 30px;white-space:nowrap;
  box-shadow:0 8px 24px -8px rgba(249,115,22,.6);
}
.cta .btn:hover{background:var(--accent-strong);color:#fff}

/* ---------- footer ---------- */
footer{
  margin-top:70px;padding:34px 0 46px;border-top:1px solid var(--line);
  font-size:.83rem;color:var(--muted);
}
footer .wrap{display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between}

/* ---------- print ---------- */
@media print{
  :root{--bg:#fff;--shadow:none;--shadow-lg:none}
  body{font-size:12px;background:#fff}
  .topbar,.lang-switch{display:none!important}
  .hero{padding:40px 0 90px;-webkit-print-color-adjust:exact;print-color-adjust:exact}
  .kpi-strip{margin-top:-60px}
  section.block{padding:34px 0 6px;break-inside:auto}
  .card,.kpi,.callout,.shot,.tbl-wrap,.diagram,.steps li,.timeline li{break-inside:avoid;box-shadow:none}
  .diagram{overflow:visible}
  .diagram svg{min-width:0}
  .formula{-webkit-print-color-adjust:exact;print-color-adjust:exact;white-space:normal}
  .cta{-webkit-print-color-adjust:exact;print-color-adjust:exact;break-inside:avoid}
  a{text-decoration:none;color:inherit}
  .cta .btn::after{content:"  ->  linkedin.com/in/sedovkirill";font-weight:700;font-size:.85em}
  .shot.is-pending{display:none}
}