/* ============================================================
   Shared stylesheet for project case-study pages.

   index.html stays a single self-contained file on purpose: build-pdf.sh
   prints it headlessly and the CV PDF must never depend on a second
   request resolving. Sub-pages have no such constraint, so they share
   this sheet instead of copying it.

   Tokens are kept identical to the ones in index.html. Radius scale
   (locked): sm 8px chips - md 12px controls - lg 16px panels -
   pill 999px toggles. One accent hue plus one warning hue, which is
   reserved for three semantic states and used nowhere else.
   ============================================================ */

:root{
  --bg:#0a0b0e;
  --bg-elev:#101218;
  --surface:rgba(255,255,255,.04);
  --surface-2:rgba(255,255,255,.075);
  --border:rgba(255,255,255,.10);
  --border-strong:rgba(255,255,255,.21);
  --fg:#eef0f4;
  --fg-2:#a7adbb;
  --fg-3:#818899;
  --accent:#5ee9b5;
  --accent-soft:rgba(94,233,181,.13);
  --accent-line:rgba(94,233,181,.34);
  --on-accent:#04140d;
  --shade:rgba(4,10,8,.55);
  --tint:rgba(94,233,181,.055);
  --warn:#f2b45e;
  --warn-soft:rgba(242,180,94,.12);
  --warn-line:rgba(242,180,94,.34);

  --r-sm:8px; --r-md:12px; --r-lg:16px; --r-pill:999px;
  --maxw:1100px;
  --nav-h:60px;
  --ease:cubic-bezier(.2,.8,.2,1);
}
:root[data-theme="light"]{
  --bg:#f7f8fa;
  --bg-elev:#ffffff;
  --surface:rgba(16,22,30,.035);
  --surface-2:rgba(16,22,30,.065);
  --border:rgba(16,22,30,.12);
  --border-strong:rgba(16,22,30,.26);
  --fg:#12161c;
  --fg-2:#4c5563;
  --fg-3:#606875;
  --accent:#0a7d5c;
  --accent-soft:rgba(10,125,92,.10);
  --accent-line:rgba(10,125,92,.30);
  --on-accent:#ffffff;
  --shade:rgba(16,22,30,.10);
  --tint:rgba(10,125,92,.035);
  --warn:#9a6410;
  --warn-soft:rgba(154,100,16,.10);
  --warn-line:rgba(154,100,16,.28);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--fg);
  font-family:'Geist','Geist Fallback',-apple-system,BlinkMacSystemFont,'Segoe UI',system-ui,sans-serif;
  font-size:16px;line-height:1.62;font-weight:400;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
::selection{background:var(--accent);color:var(--on-accent)}
a{color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.mono{font-family:'Geist Mono','Geist Mono Fallback',ui-monospace,SFMono-Regular,Menlo,monospace}

.skip{
  position:absolute;left:-9999px;top:0;z-index:100;
  background:var(--accent);color:var(--on-accent);
  padding:10px 16px;border-radius:0 0 var(--r-md) 0;font-size:14px;font-weight:500;text-decoration:none;
}
.skip:focus{left:0}

.bg-decor{
  position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(80% 46% at 12% -8%, var(--tint), transparent 68%),
    radial-gradient(60% 40% at 96% 4%, var(--tint), transparent 70%);
}

/* ---------- nav ---------- */
nav{
  position:sticky;top:0;z-index:50;
  background:color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter:blur(16px) saturate(150%);
  -webkit-backdrop-filter:blur(16px) saturate(150%);
  border-bottom:1px solid transparent;transition:border-color .3s ease;
}
nav.stuck{border-bottom-color:var(--border)}
.nav-inner{
  max-width:var(--maxw);margin:0 auto;padding:0 24px;
  height:var(--nav-h);display:flex;align-items:center;gap:18px;
}
.brand{font-weight:600;letter-spacing:-.02em;font-size:15px;white-space:nowrap;text-decoration:none;display:inline-flex;align-items:center;gap:8px}
.brand i{font-style:normal;color:var(--accent)}
.brand svg{width:15px;height:15px;color:var(--fg-3);transition:transform .25s var(--ease),color .25s}
.brand:hover svg{transform:translateX(-3px);color:var(--accent)}
.nav-links{display:flex;gap:22px;margin-left:auto}
.nav-links a{
  color:var(--fg-2);text-decoration:none;font-size:14px;
  position:relative;transition:color .2s;white-space:nowrap;padding:4px 0;
}
.nav-links a::after{
  content:'';position:absolute;left:0;right:100%;bottom:0;height:1px;
  background:var(--accent);transition:right .28s var(--ease);
}
.nav-links a:hover{color:var(--fg)}
.nav-links a:hover::after{right:0}
.nav-links a[aria-current="true"]{color:var(--fg)}
.nav-links a[aria-current="true"]::after{right:0}

.switches{display:flex;gap:8px;margin-left:auto;flex-shrink:0}
.nav-links ~ .switches{margin-left:0}
.seg{display:flex;border:1px solid var(--border);border-radius:var(--r-pill);overflow:hidden;background:var(--surface)}
.seg button{
  background:none;border:none;color:var(--fg-3);font:inherit;font-size:12px;font-weight:600;
  padding:5px 11px;cursor:pointer;transition:color .2s,background .2s;letter-spacing:.04em;line-height:1.4;
}
.seg button[aria-pressed="true"]{background:var(--accent);color:var(--on-accent)}
.seg button[aria-pressed="false"]:hover{color:var(--fg)}
.icon-btn{
  display:grid;place-items:center;width:34px;height:34px;flex-shrink:0;
  border:1px solid var(--border);border-radius:var(--r-pill);background:var(--surface);
  color:var(--fg-2);cursor:pointer;transition:color .2s,border-color .2s,background .2s;
}
.icon-btn:hover{color:var(--fg);border-color:var(--border-strong);background:var(--surface-2)}
.icon-btn svg{width:16px;height:16px}
:root[data-theme="dark"] .ico-sun{display:block}
:root[data-theme="dark"] .ico-moon{display:none}
:root[data-theme="light"] .ico-sun{display:none}
:root[data-theme="light"] .ico-moon{display:block}

/* ---------- shared atoms ---------- */
.btn{
  display:inline-flex;align-items:center;gap:9px;white-space:nowrap;
  padding:12px 22px;border-radius:var(--r-md);text-decoration:none;
  font-size:14.5px;font-weight:500;border:1px solid transparent;
  transition:transform .18s var(--ease),box-shadow .25s,background .25s,border-color .25s;
}
.btn:active{transform:scale(.975)}
.btn-primary{background:var(--accent);color:var(--on-accent);box-shadow:0 6px 22px -10px var(--accent-line)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 30px -12px var(--accent-line)}
.btn-ghost{background:var(--surface);color:var(--fg);border-color:var(--border)}
.btn-ghost:hover{background:var(--surface-2);border-color:var(--border-strong);transform:translateY(-2px)}
.btn svg{width:16px;height:16px;flex-shrink:0}

.badge{
  font-family:'Geist Mono','Geist Mono Fallback',ui-monospace,monospace;
  font-size:11px;letter-spacing:.03em;padding:4px 10px;border-radius:var(--r-pill);
  border:1px solid var(--border);color:var(--fg-3);background:var(--surface);white-space:nowrap;
}
.badge.hi{color:var(--accent);border-color:var(--accent-line);background:var(--accent-soft)}
.badge.opt{color:var(--fg-3)}
.tech{
  font-family:'Geist Mono','Geist Mono Fallback',ui-monospace,monospace;
  font-size:11.5px;padding:4px 9px;border-radius:var(--r-sm);
  background:var(--surface);border:1px solid var(--border);color:var(--fg-2);
}
.stack{display:flex;flex-wrap:wrap;gap:7px}

section{padding:74px 0;scroll-margin-top:calc(var(--nav-h) + 14px)}
.sec-head{margin-bottom:36px;max-width:62ch}
h1{font-size:clamp(2.5rem,5.6vw,3.9rem);line-height:1.04;font-weight:600;letter-spacing:-.035em}
h2{font-size:clamp(1.65rem,3.2vw,2.25rem);font-weight:600;letter-spacing:-.032em;line-height:1.18}
h3{font-weight:600;letter-spacing:-.02em}
.sec-sub{color:var(--fg-3);margin-top:12px;font-size:15.5px;max-width:60ch}
.lede{color:var(--fg-2);font-size:15.5px;max-width:66ch}
.lede + .lede{margin-top:14px}
.lede strong{color:var(--fg);font-weight:600}
.sub-h{font-size:1.02rem;margin-bottom:14px}

footer{border-top:1px solid var(--border);padding:28px 0 44px;margin-top:20px}
.foot{display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;color:var(--fg-3);font-size:13px}
.foot a{text-decoration:none;transition:color .2s}
.foot a:hover{color:var(--accent)}

.rv{opacity:0;transform:translateY(16px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.rv.in{opacity:1;transform:none}

html[lang="ru"] [data-en]{display:none !important}
html[lang="en"] [data-ru]{display:none !important}

/* ============================================================
   CASE STUDY
   ============================================================ */

/* ---------- breadcrumb ---------- */
.crumb{padding-top:26px;font-size:13.5px;color:var(--fg-3)}
.crumb a{text-decoration:none;transition:color .2s}
.crumb a:hover{color:var(--accent)}
.crumb span{opacity:.55;padding:0 8px}

/* ---------- hero ---------- */
.cs-hero{padding:34px 0 56px;display:grid;grid-template-columns:1.02fr .98fr;gap:56px;align-items:center}
.status{
  display:inline-flex;align-items:center;gap:9px;
  background:var(--surface);border:1px solid var(--border);
  padding:6px 14px 6px 11px;border-radius:var(--r-pill);
  font-size:13px;color:var(--fg-2);margin-bottom:22px;
}
.dot{width:7px;height:7px;border-radius:50%;background:var(--accent);position:relative;flex-shrink:0}
.dot::after{
  content:'';position:absolute;inset:-4px;border-radius:50%;
  background:var(--accent);opacity:.3;animation:pulse 2.4s ease-out infinite;
}
@keyframes pulse{0%{transform:scale(.6);opacity:.45}70%,100%{transform:scale(1.9);opacity:0}}
.cs-role{font-size:clamp(1.05rem,2vw,1.3rem);color:var(--fg-2);letter-spacing:-.015em;margin-top:10px}
.cs-role b{color:var(--accent);font-weight:600}
.cs-lead{color:var(--fg-2);max-width:50ch;margin:20px 0 28px;font-size:16px}

/* six contours, the one full map of the system */
.map{
  background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--r-lg);
  padding:20px;box-shadow:0 24px 60px -34px var(--shade);
}
.map-t{
  font-size:11.5px;letter-spacing:.09em;text-transform:uppercase;color:var(--fg-3);
  font-family:'Geist Mono','Geist Mono Fallback',ui-monospace,monospace;margin-bottom:12px;
}
.map-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.map-cell{
  border:1px solid var(--border);border-radius:var(--r-sm);padding:10px 12px;
  background:var(--surface);transition:border-color .3s,background .3s;
}
.map-cell:hover{border-color:var(--accent-line);background:var(--accent-soft)}
.map-cell b{display:block;font-size:13.5px;font-weight:600;letter-spacing:-.01em}
.map-cell i{display:block;font-style:normal;font-size:12px;color:var(--fg-3);line-height:1.4;margin-top:2px}
.map-cell u{
  display:inline-block;text-decoration:none;margin-top:7px;
  font-family:'Geist Mono','Geist Mono Fallback',ui-monospace,monospace;
  font-size:10px;letter-spacing:.06em;text-transform:uppercase;color:var(--fg-3);
  border:1px solid var(--border);border-radius:var(--r-pill);padding:1px 7px;
}
.map-rail{
  margin-top:8px;border:1px dashed var(--border);border-radius:var(--r-sm);
  padding:9px 12px;font-size:12px;color:var(--fg-3);display:flex;gap:8px;flex-wrap:wrap;align-items:baseline;
}
.map-rail em{font-style:normal;color:var(--accent);font-weight:600;font-size:11.5px;letter-spacing:.04em;text-transform:uppercase}
.map-rail.ext em{color:var(--fg-2)}

/* ---------- numbers band ---------- */
.band{border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.stats{display:grid;grid-template-columns:repeat(3,1fr)}
.stat{padding:22px 26px 22px 0}
.stat:not(:nth-child(3n+1)){border-left:1px solid var(--border);padding-left:26px}
.stat:nth-child(n+4){border-top:1px solid var(--border)}
.stat .n{
  font-family:'Geist Mono','Geist Mono Fallback',ui-monospace,monospace;
  font-size:clamp(1.4rem,3vw,1.9rem);font-weight:500;letter-spacing:-.03em;line-height:1.1;color:var(--accent);
}
.stat .l{font-size:13px;color:var(--fg-3);margin-top:6px;line-height:1.4;max-width:24ch}

/* ---------- sequence of one message ---------- */
.seq{border-top:1px solid var(--border)}
.seq-row{
  display:grid;grid-template-columns:minmax(140px,200px) 1fr;gap:12px 24px;
  padding:13px 0;border-bottom:1px solid var(--border);align-items:baseline;
}
.seq-row dt{
  font-family:'Geist Mono','Geist Mono Fallback',ui-monospace,monospace;
  font-size:12px;letter-spacing:.03em;color:var(--accent);
}
.seq-row dd{font-size:14px;color:var(--fg-2)}
.seq-row dd b{color:var(--fg);font-weight:600}

/* ---------- agent tools ---------- */
.tools{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.tool{border:1px solid var(--border);border-radius:var(--r-md);padding:14px 16px;background:var(--bg-elev)}
.tool b{display:block;font-size:13.5px;letter-spacing:-.01em}
.tool i{display:block;font-style:normal;font-size:12px;color:var(--fg-3);margin-top:4px;line-height:1.42}

/* ---------- horizontal pipeline ---------- */
.flow-scroll{margin-bottom:26px}
/* Four across, two rows. Eight in a single row leaves ~100px per label, which
   Russian compound nouns do not fit into: they collided at 1440px. */
.flow{display:grid;grid-template-columns:repeat(4,1fr)}
.step{
  min-width:0;padding:14px 18px 18px 18px;position:relative;
  border-top:1px solid var(--border);
  overflow-wrap:break-word;
  opacity:0;transform:translateY(10px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
  transition-delay:calc(var(--i) * 65ms);
}
.flow.in .step{opacity:1;transform:none}
.step::before{
  content:'';position:absolute;top:-4px;left:0;width:7px;height:7px;border-radius:50%;
  background:var(--bg);border:1px solid var(--border-strong);
}
.step.key::before{background:var(--accent);border-color:var(--accent)}
.step b{display:block;font-size:13.5px;font-weight:600;letter-spacing:-.01em;line-height:1.3}
.step i{display:block;font-style:normal;font-size:12px;color:var(--fg-3);margin-top:4px;line-height:1.42}
.step.key b{color:var(--accent)}
.step.par{background:linear-gradient(180deg,var(--tint),transparent 70%)}

/* four outcomes */
.outs{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.out{border:1px solid var(--border);border-radius:var(--r-md);padding:14px 16px;background:var(--bg-elev)}
.out b{display:block;font-size:14px;letter-spacing:-.01em}
.out i{display:block;font-style:normal;font-size:12.5px;color:var(--fg-3);margin-top:5px;line-height:1.45}
.out.ok{border-color:var(--accent-line);background:linear-gradient(180deg,var(--accent-soft),transparent 60%),var(--bg-elev)}
.out.ok b{color:var(--accent)}
.out.warn{border-color:var(--warn-line)}
.out.warn b{color:var(--warn)}

/* fallbacks: hairline rows, no card boxes */
.fails{border-top:1px solid var(--border);margin-top:28px}
.fail{
  display:grid;grid-template-columns:minmax(180px,.9fr) 1fr;gap:10px 26px;
  padding:14px 0;border-bottom:1px solid var(--border);align-items:baseline;
}
.fail dt{font-size:13.5px;color:var(--fg-2)}
.fail dd{font-size:13.5px;color:var(--fg)}
.fail dd b{color:var(--accent);font-weight:600}

/* ---------- split with a chart ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center}
.chart{border:1px solid var(--border);border-radius:var(--r-lg);background:var(--bg-elev);padding:24px}
.chart-t{
  font-size:11.5px;letter-spacing:.09em;text-transform:uppercase;color:var(--fg-3);
  font-family:'Geist Mono','Geist Mono Fallback',ui-monospace,monospace;margin-bottom:18px;
}
.bar{margin-bottom:18px}
.bar:last-of-type{margin-bottom:0}
.bar-l{display:flex;justify-content:space-between;align-items:baseline;font-size:13px;color:var(--fg-2);margin-bottom:7px;gap:12px}
.bar-l b{font-family:'Geist Mono','Geist Mono Fallback',ui-monospace,monospace;font-size:15px;color:var(--fg);font-weight:500}
.bar-track{height:10px;border-radius:var(--r-pill);background:var(--surface-2);overflow:hidden}
.bar-fill{
  display:block;height:100%;border-radius:var(--r-pill);width:0;min-width:8px;
  background:var(--fg-3);transition:width 1.1s var(--ease);
}
.chart.in .bar-fill{width:var(--w)}
.bar.now .bar-fill{background:var(--accent)}
.bar.now .bar-l b{color:var(--accent)}
.chart-foot{
  margin-top:20px;padding-top:16px;border-top:1px solid var(--border);
  font-size:12.5px;color:var(--fg-3);line-height:1.5;
}
.chart-foot b{color:var(--accent);font-weight:600;font-family:'Geist Mono',ui-monospace,monospace}

/* ---------- confidence scale ---------- */
.scale{margin-bottom:32px}
.scale-track{
  height:38px;border-radius:var(--r-md);overflow:hidden;display:grid;grid-template-columns:32% 26% 42%;
  border:1px solid var(--border);
}
.scale-z{display:grid;place-items:center;font-size:12.5px;font-weight:600;letter-spacing:.01em}
.scale-z.z1{background:var(--surface-2);color:var(--fg-2)}
.scale-z.z2{background:var(--warn-soft);color:var(--warn);border-left:1px solid var(--border);border-right:1px solid var(--border)}
.scale-z.z3{background:var(--accent-soft);color:var(--accent)}
.scale-ax{
  display:flex;justify-content:space-between;margin-top:8px;
  font-family:'Geist Mono','Geist Mono Fallback',ui-monospace,monospace;
  font-size:11.5px;color:var(--fg-3);
}
.duo{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start}
.tick{list-style:none}
.tick li{
  font-size:14px;color:var(--fg-2);padding-left:26px;position:relative;
  padding-bottom:11px;line-height:1.5;
}
.tick li::before{
  content:'';position:absolute;left:2px;top:8px;width:9px;height:5px;
  border-left:1.5px solid var(--accent);border-bottom:1.5px solid var(--accent);
  transform:rotate(-45deg);
}
.tick li b{color:var(--fg);font-weight:600}
.note{
  margin-top:26px;border-left:2px solid var(--accent-line);
  padding:2px 0 2px 18px;font-size:13.5px;color:var(--fg-3);line-height:1.55;
}
.note b{color:var(--fg-2);font-weight:600}

/* ---------- two scenarios side by side ---------- */
.cmp{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.cmp-col{border:1px solid var(--border);border-radius:var(--r-lg);padding:22px;background:var(--bg-elev)}
.cmp-col.hi{border-color:var(--accent-line);background:linear-gradient(170deg,var(--accent-soft),transparent 46%),var(--bg-elev)}
.cmp-col h3{font-size:1.02rem;margin-bottom:14px}
.cmp-col dl{border-top:1px solid var(--border)}
.cmp-col dl > div{display:grid;grid-template-columns:112px 1fr;gap:14px;padding:10px 0;border-bottom:1px solid var(--border)}
.cmp-col dt{font-size:12.5px;color:var(--fg-3)}
.cmp-col dd{font-size:13.5px;color:var(--fg-2)}

/* ---------- triage: fields + funnel ---------- */
.fields{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;margin-bottom:30px}
.field{border:1px solid var(--border);border-radius:var(--r-md);padding:14px;background:var(--bg-elev)}
.field b{display:block;font-size:13.5px;letter-spacing:-.01em}
.field i{
  display:block;font-style:normal;margin-top:9px;font-size:11px;letter-spacing:.05em;text-transform:uppercase;
  font-family:'Geist Mono','Geist Mono Fallback',ui-monospace,monospace;color:var(--fg-3);
}
.field.auto{border-color:var(--accent-line);background:linear-gradient(180deg,var(--accent-soft),transparent 70%),var(--bg-elev)}
.field.auto i{color:var(--accent)}
.funnel{display:flex;flex-direction:column;gap:8px;max-width:560px}
.fn{
  border:1px solid var(--border);border-radius:var(--r-sm);padding:11px 16px;background:var(--surface);
  font-size:13.5px;color:var(--fg-2);display:flex;gap:14px;align-items:baseline;
}
.fn:nth-child(1){width:100%}
.fn:nth-child(2){width:88%}
.fn:nth-child(3){width:76%}
.fn:nth-child(4){width:64%;border-color:var(--accent-line);background:var(--accent-soft);color:var(--fg)}
.fn em{
  font-style:normal;font-family:'Geist Mono','Geist Mono Fallback',ui-monospace,monospace;
  font-size:11px;color:var(--fg-3);letter-spacing:.05em;flex-shrink:0;
}
.modes{display:flex;flex-wrap:wrap;gap:8px;margin-top:26px}
.mode{
  border:1px solid var(--border);border-radius:var(--r-pill);padding:7px 15px;font-size:13px;color:var(--fg-2);
  background:var(--surface);
}
.mode.safe{border-color:var(--accent-line);color:var(--accent);background:var(--accent-soft)}

/* ---------- learning loop ---------- */
.loop{display:flex;flex-wrap:wrap;align-items:stretch;gap:8px;margin-bottom:8px}
.node{
  flex:1 1 130px;border:1px solid var(--border);border-radius:var(--r-md);padding:13px 15px;
  background:var(--bg-elev);position:relative;
}
.node b{display:block;font-size:13.5px;letter-spacing:-.01em}
.node i{display:block;font-style:normal;font-size:12px;color:var(--fg-3);margin-top:3px;line-height:1.4}
.node.gate{border-color:var(--warn-line);background:linear-gradient(180deg,var(--warn-soft),transparent 70%),var(--bg-elev)}
.node.gate b{color:var(--warn)}
.loop-back{
  display:flex;align-items:center;gap:12px;font-size:12.5px;color:var(--fg-3);
  border-left:1px solid var(--border);border-bottom:1px solid var(--border);
  border-bottom-left-radius:var(--r-md);height:26px;padding:0 0 0 14px;margin-bottom:26px;
}
.hard{
  border:1px solid var(--warn-line);background:var(--warn-soft);
  border-radius:var(--r-md);padding:16px 20px;font-size:14px;color:var(--fg);line-height:1.55;max-width:74ch;
}
.hard b{color:var(--warn)}

/* ---------- security: path with four posts ---------- */
.path{
  display:grid;grid-template-columns:repeat(5,1fr);gap:0;margin-bottom:26px;
  border-top:1px solid var(--border);
}
.post{padding:14px 12px 0 16px;position:relative;font-size:12.5px;color:var(--fg-3);line-height:1.4}
.post::before{
  content:'';position:absolute;top:-4px;left:0;width:7px;height:7px;border-radius:50%;
  background:var(--bg);border:1px solid var(--border-strong);
}
.post b{display:block;color:var(--fg-2);font-size:13px;font-weight:500}
.guards{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.guards--3{grid-template-columns:repeat(3,1fr)}
.guard{
  border:1px solid var(--border);border-radius:var(--r-lg);padding:22px;background:var(--bg-elev);
  transition:border-color .3s,transform .3s var(--ease);
}
.guard:hover{border-color:var(--border-strong);transform:translateY(-3px)}
.guard-h{display:flex;align-items:center;gap:12px;margin-bottom:10px}
.guard h3{font-size:1.02rem;flex:1 1 auto}
.guard p{font-size:14px;color:var(--fg-2);line-height:1.55}
.guard p + p{margin-top:10px}
.guard.lead{
  background:linear-gradient(150deg,var(--accent-soft),transparent 48%),var(--bg-elev);
  border-color:var(--accent-line);margin-bottom:14px;
}
.layers{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:16px}
.layer{border:1px solid var(--border);border-radius:var(--r-sm);padding:12px 14px;background:var(--surface)}
.layer b{display:block;font-size:13px}
.layer i{display:block;font-style:normal;font-size:11.5px;color:var(--fg-3);margin-top:4px;line-height:1.4}

/* ---------- waterfall of a single turn ---------- */
.wf{border:1px solid var(--border);border-radius:var(--r-lg);background:var(--bg-elev);padding:24px}
.wf-row{display:grid;grid-template-columns:minmax(110px,172px) 1fr 58px;gap:8px 16px;align-items:center;margin-bottom:11px}
.wf-row .lbl{font-size:13px;color:var(--fg-2)}
.wf-lane{height:12px;border-radius:var(--r-pill);background:var(--surface-2);position:relative;overflow:hidden}
.wf-lane b{
  position:absolute;top:0;bottom:0;left:var(--x);width:0;
  background:var(--fg-3);border-radius:var(--r-pill);transition:width .85s var(--ease);
}
.wf.in .wf-lane b{width:var(--w)}
.wf-row.model .wf-lane b{background:var(--accent)}
.wf-row .t{
  font-family:'Geist Mono','Geist Mono Fallback',ui-monospace,monospace;
  font-size:12.5px;color:var(--fg);text-align:right;
}
.wf-row.model .t{color:var(--accent)}
.wf-total{margin-top:16px;padding-top:14px;border-top:1px solid var(--border);font-size:13px;color:var(--fg-3)}
.wf-total b{color:var(--fg);font-family:'Geist Mono',ui-monospace,monospace}

/* ---------- hairline label + text rows ---------- */
.rec{border-top:1px solid var(--border)}
.rec-row{
  display:grid;grid-template-columns:180px 1fr;gap:24px;
  padding:20px 0;border-bottom:1px solid var(--border);align-items:baseline;
}
.rec-row h3{
  font-size:12.5px;letter-spacing:.09em;text-transform:uppercase;color:var(--accent);
  font-family:'Geist Mono','Geist Mono Fallback',ui-monospace,monospace;font-weight:500;
}
.rec-row p{font-size:14.5px;color:var(--fg-2);max-width:70ch}

/* ---------- grouped cards ---------- */
.svc{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.svc--3{grid-template-columns:repeat(3,1fr)}
.svc-g{border:1px solid var(--border);border-radius:var(--r-lg);padding:20px 22px;background:var(--bg-elev)}
.svc-g h3{font-size:14.5px;margin-bottom:4px}
.svc-g .when{
  font-family:'Geist Mono','Geist Mono Fallback',ui-monospace,monospace;
  font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--fg-3);margin-bottom:12px;display:block;
}
.svc-g .when.hi{color:var(--accent)}
.svc-g ul{list-style:none}
.svc-g li{font-size:13.5px;color:var(--fg-2);padding-left:18px;position:relative;line-height:1.5;margin-bottom:5px}
.svc-g li::before{content:'';position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:2px;background:var(--accent);opacity:.7}
.svc-g p{font-size:13.5px;color:var(--fg-2);line-height:1.5}

/* ---------- closing ---------- */
.close{
  border:1px solid var(--border);border-radius:var(--r-lg);padding:40px;
  background:linear-gradient(160deg,var(--accent-soft),transparent 52%),var(--bg-elev);
  display:flex;flex-wrap:wrap;gap:26px 40px;align-items:center;justify-content:space-between;
}
.close h2{max-width:20ch}
.close p{color:var(--fg-2);font-size:15px;max-width:46ch;margin-top:12px}

/* ---------- responsive ---------- */
@media(max-width:1080px){
  .nav-links{gap:16px}
  .nav-links a{font-size:13.5px}
}
@media(max-width:940px){
  .cs-hero{grid-template-columns:1fr;gap:34px;padding-top:26px}
  .split{grid-template-columns:1fr;gap:32px}
  .duo{grid-template-columns:1fr;gap:30px}
  .outs{grid-template-columns:1fr 1fr}
  .fields{grid-template-columns:1fr 1fr}
  .tools{grid-template-columns:1fr 1fr}
  .cmp{grid-template-columns:1fr}
  .guards,.guards--3{grid-template-columns:1fr}
  .svc,.svc--3{grid-template-columns:1fr}
  .layers{grid-template-columns:1fr}
  .flow{grid-template-columns:repeat(2,1fr)}
  .path{grid-template-columns:1fr 1fr}
  .post{padding-bottom:12px}
  .seq-row{grid-template-columns:1fr;gap:3px}
  .stats{grid-template-columns:1fr 1fr}
  .stat{padding:20px 20px 20px 0}
  .stat:not(:nth-child(3n+1)){border-left:0;padding-left:0}
  .stat:nth-child(even){border-left:1px solid var(--border);padding-left:22px}
  .stat:nth-child(n+3){border-top:1px solid var(--border);padding-top:20px}
  .rec-row{grid-template-columns:1fr;gap:8px}
  .fail{grid-template-columns:1fr;gap:4px}
}
@media(max-width:640px){
  .nav-links{display:none}
  .switches{margin-left:auto}
  .wrap{padding:0 18px}
  section{padding:52px 0}
  .cs-hero{padding:18px 0 40px}
  .flow{grid-template-columns:1fr}
  .outs{grid-template-columns:1fr}
  .fields{grid-template-columns:1fr}
  .tools{grid-template-columns:1fr}
  .map-grid{grid-template-columns:1fr}
  .path{grid-template-columns:1fr}
  .close{padding:26px}
  .funnel .fn{width:100% !important}
  .scale-track{grid-template-columns:34% 26% 40%}
  .scale-z{font-size:11.5px}
  .wf-row{grid-template-columns:1fr 58px;gap:6px 12px}
  .wf-row .lbl{grid-column:1 / -1}
  .cmp-col dl > div{grid-template-columns:1fr;gap:2px}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none !important;transition:none !important}
  .rv,.step{opacity:1;transform:none}
  .bar-fill,.wf-lane b{width:var(--w) !important}
  html{scroll-behavior:auto}
}
@media(prefers-reduced-transparency:reduce){
  nav{background:var(--bg);backdrop-filter:none;-webkit-backdrop-filter:none}
}

/* ---------- print ----------
   The CV PDF comes from index.html only. This block just keeps the
   case study readable if somebody prints it from the browser. */
@media print{
  :root,:root[data-theme="light"],:root[data-theme="dark"]{
    --bg:#fff;--bg-elev:#fff;--surface:transparent;--surface-2:transparent;
    --border:#d3d8de;--border-strong:#aeb5bd;
    --fg:#000;--fg-2:#23262b;--fg-3:#4f555e;--accent:#0a6b4f;--accent-soft:transparent;
    --accent-line:#0a6b4f;--tint:transparent;--shade:transparent;
    --warn:#8a5a08;--warn-soft:transparent;--warn-line:#8a5a08;
  }
  nav,.bg-decor,.skip,.switches{display:none !important}
  html,body{background:#fff;color:#000}
  body{font-size:10pt;line-height:1.45;-webkit-print-color-adjust:exact;print-color-adjust:exact}
  .wrap{max-width:none;padding:0}
  .rv,.step{opacity:1 !important;transform:none !important}
  .bar-fill,.wf-lane b{width:var(--w) !important}
  section{padding:12pt 0}
  .cs-hero,.split,.duo{grid-template-columns:1fr 1fr;gap:8mm}
  .guard,.node,.out,.field,.svc-g,.chart,.map,.tool,.cmp-col,.wf{break-inside:avoid}
  h1,h2,h3{break-after:avoid;break-inside:avoid}
}