/* ============================================================
   Sébastien Vercammen — proof-of-work portfolio
   Shared design system. Dark, technical, measured.
   One stylesheet, no build step, no external runtime deps.
   ============================================================ */

:root{
  /* surfaces */
  --ink:#0E1217; --ink-2:#141A21; --ink-3:#1B232C; --ink-4:#222C37;
  --line:rgba(232,238,244,.08); --line-2:rgba(232,238,244,.14); --line-3:rgba(232,238,244,.22);
  /* background grid: two tiers, both quieter than --line so the grid never
     competes with a real border drawn in --line */
  --grid-minor:rgba(232,238,244,.022); --grid-major:rgba(232,238,244,.055);
  /* the same two colours with the .42 --ink veil already folded in (alpha x .58).
     This is exactly what the grid settles to below the hero, precomputed, so the
     baseline layer needs no veil and therefore no element height. */
  --grid-minor-set:rgba(232,238,244,.0128); --grid-major-set:rgba(232,238,244,.032);
  /* text */
  --text:#E7ECF1; --dim:#8B97A4; --faint:#586673;
  /* accents: teal = the fix/result/inspection, amber = the symptom/warning */
  --accent:#4FD6BC; --accent-2:#63e3ca; --accent-soft:rgba(79,214,188,.14);
  --symptom:#E08A4A; --symptom-soft:rgba(224,138,74,.13);
  /* track hues (subtle) */
  --games:#4FD6BC; --data:#7CA8FF;
  /* type */
  --display:'Space Grotesk',system-ui,sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,'SF Mono',monospace;
  --body:'Inter',system-ui,sans-serif;
  --maxw:1080px; --readw:720px;
}

*{box-sizing:border-box;margin:0;padding:0}
/* The baseline grid lives on the root element, whose background paints over the
   whole canvas by definition. That covers any document height for free: nothing to
   size, and no document-tall layer to rasterize. Pure tiles, no gradient, so it
   never needs to know how long the page is. */
html{
  scroll-behavior:smooth;
  background-color:var(--ink);
  background-image:
    linear-gradient(var(--grid-minor-set) 1px,transparent 1px),
    linear-gradient(90deg,var(--grid-minor-set) 1px,transparent 1px),
    linear-gradient(var(--grid-major-set) 1px,transparent 1px),
    linear-gradient(90deg,var(--grid-major-set) 1px,transparent 1px);
  background-size:32px 32px,32px 32px,128px 128px,128px 128px;
  background-position:center top;
}
/* No position:relative. body::before is top-anchored against the initial
   containing block, which is already pinned to the document origin — which is
   exactly what a hero-only overlay wants. Making body the containing block is
   what forced that overlay to the full document height. */
body{
  background:transparent; color:var(--text); font-family:var(--body);
  font-size:17px; line-height:1.6; -webkit-font-smoothing:antialiased; font-weight:450;
}

/* ---- background grid · hero boost ----------------------------------------
   Two-tier engineering grid: minor 32px, major 128px, both well under --line
   so the grid never reads as strongly as a real border in the same colour.

   The grid itself is on `html` above — pure tiles, infinite, free. This
   element exists only to make the grid *brighter over the hero* and fade it
   back to the baseline. That is the only part of the design that needs to
   know a pixel height, so it is the only part with one: 1100px, where the
   falloff settles. Below that it does not exist and costs nothing.

   It was previously `inset:0` against a `position:relative` body, which made
   it as tall as the whole document (~13,600px on the buyer page) — five
   stacked background layers rasterized across the entire scroll length. That
   is what made scrolling stutter.

   `background-color` is opaque --ink on purpose: it hides the baseline grid
   inside this band so the two never double-draw. At y=1100 the veil is at
   exactly .42, which is the value already folded into --grid-*-set, so the
   handover to the baseline is seamless.

   Still no mask and no position:fixed. A fixed layer cannot be scrolled by
   translation, and a mask forces the whole viewport to re-rasterize every
   frame — together they cost a full software repaint per scroll frame when
   GPU acceleration is off.
------------------------------------------------------------------------- */
body::before{
  content:""; position:absolute; top:0; left:0; right:0; height:1100px;
  z-index:-1; pointer-events:none;
  background-color:var(--ink);
  background-image:
    /* topmost layer: --ink (#0E1217) at 0 → .42 by the element's bottom edge */
    linear-gradient(to bottom,
      rgba(14,18,23,0) 0,
      rgba(14,18,23,0) 420px,
      rgba(14,18,23,.42) 1100px),
    linear-gradient(var(--grid-minor) 1px,transparent 1px),
    linear-gradient(90deg,var(--grid-minor) 1px,transparent 1px),
    linear-gradient(var(--grid-major) 1px,transparent 1px),
    linear-gradient(90deg,var(--grid-major) 1px,transparent 1px);
  background-size:100% 100%,32px 32px,32px 32px,128px 128px,128px 128px;
  background-position:center top;
  background-repeat:no-repeat,repeat,repeat,repeat,repeat;
}
.wrap{max-width:var(--maxw); margin:0 auto; padding:0 28px}
.wrap.narrow{max-width:var(--readw)}
img,video{max-width:100%; height:auto; display:block}

/* ---- primitives ---- */
.eyebrow{font-family:var(--mono); font-size:12px; font-weight:500; letter-spacing:.18em; text-transform:uppercase; color:var(--accent)}
.eyebrow.data{color:var(--data)}
.ph{color:var(--faint); border-bottom:1px dotted var(--faint)}
a{color:var(--accent); text-decoration:none}
a:hover{text-decoration:underline}
:focus-visible{outline:2px solid var(--accent); outline-offset:3px; border-radius:2px}
.mono{font-family:var(--mono)}
hr{border:0; border-top:1px solid var(--line); margin:40px 0}

/* ---- header / nav ---- */
/* No backdrop-filter. It has to sample everything painted beneath it on every
   frame the backdrop changes — i.e. every scroll frame — and without GPU
   acceleration that is a software readback and blur per frame, on a sticky
   element that is on screen the entire time. The alpha is raised from .72 to
   .94 to compensate: at that opacity the blur was doing almost nothing anyway,
   since there is no longer enough showing through to read. */
header.site{position:sticky; top:0; z-index:20; background:rgba(14,18,23,.94); border-bottom:1px solid var(--line)}
.bar{display:flex; align-items:center; justify-content:space-between; gap:16px; height:60px}
.id{font-family:var(--mono); font-size:14px; font-weight:600; letter-spacing:.02em; white-space:nowrap}
.id a{color:var(--text)} .id a:hover{text-decoration:none; color:var(--accent)}
.id span{color:var(--faint)}
nav.top{display:flex; align-items:center; gap:22px; font-family:var(--mono); font-size:13px}
nav.top a{color:var(--dim)} nav.top a:hover{color:var(--text); text-decoration:none}
nav.top a.active{color:var(--text)}
.status{display:flex; align-items:center; gap:8px; font-family:var(--mono); font-size:12.5px; color:var(--dim); white-space:nowrap}
.led{width:7px; height:7px; border-radius:50%; background:var(--accent); box-shadow:0 0 0 0 rgba(79,214,188,.5); animation:pulse 2.6s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(79,214,188,.45)}70%{box-shadow:0 0 0 7px rgba(79,214,188,0)}100%{box-shadow:0 0 0 0 rgba(79,214,188,0)}}
@media (max-width:720px){
  nav.top{display:none}
  /* header bar wraps onto multiple rows instead of overflowing the viewport */
  .bar{flex-wrap:wrap; height:auto; row-gap:4px; padding-block:11px}
  .id{white-space:normal}
}

/* ---- hero ---- */
.hero{padding:92px 0 74px; border-bottom:1px solid var(--line)}
.hero h1{font-family:var(--display); font-weight:600; line-height:1.05; font-size:clamp(36px,6vw,66px); letter-spacing:-.02em; max-width:16ch}
.hero h1 em{font-style:normal; color:var(--accent)}
.lede{margin-top:24px; max-width:56ch; font-size:clamp(17px,2vw,20px); color:var(--dim)}
.lede strong{color:var(--text); font-weight:500}

/* ---- reading / before-after gauge (signature component) ---- */
.reading{background:var(--ink-2); border:1px solid var(--line-2); border-radius:10px; padding:24px 26px 28px}
.reading .head{display:flex; justify-content:space-between; align-items:baseline; flex-wrap:wrap; gap:10px}
.reading .label{font-family:var(--mono); font-size:12.5px; letter-spacing:.04em; color:var(--dim)}
.reading .delta{font-family:var(--mono); font-weight:600; font-size:15px; color:var(--accent)}
.reading .delta.down{color:var(--accent)} /* lower-is-better still shown as a win */
.gauge{margin-top:20px; display:grid; gap:13px}
.row{display:grid; grid-template-columns:64px 1fr auto; align-items:center; gap:14px}
.row .tag{font-family:var(--mono); font-size:11.5px; text-transform:uppercase; letter-spacing:.1em; color:var(--faint)}
.track{height:14px; background:var(--ink-3); border-radius:7px; overflow:hidden}
.fill{height:100%; border-radius:7px; transition:width 1.1s cubic-bezier(.2,.7,.2,1)}
.fill.before{background:var(--symptom); opacity:.62}
.fill.after{background:var(--accent)}
.val{font-family:var(--mono); font-weight:600; font-size:15px; min-width:82px; text-align:right}
.val.before{color:var(--symptom)} .val.after{color:var(--accent)}
.reading .note{margin-top:16px; font-size:14px; color:var(--faint); font-family:var(--mono)}
.mini .row{grid-template-columns:54px 1fr auto}
.mini .track{height:11px} .mini .val{font-size:14px; min-width:64px}

/* ---- section scaffolding ---- */
section{padding:64px 0}
.section-head{display:flex; align-items:baseline; gap:16px; flex-wrap:wrap}
.section-head h2{font-family:var(--display); font-weight:600; font-size:clamp(25px,3.4vw,33px); letter-spacing:-.01em}
.section-sub{color:var(--dim); max-width:60ch; margin-top:6px; font-size:15.5px}
.divider-top{border-top:1px solid var(--line)}

/* ---- method grid ---- */
.method-grid{margin-top:28px; display:grid; grid-template-columns:repeat(3,1fr); grid-auto-rows:1fr; align-items:stretch; gap:1px; background:var(--line); border:1px solid var(--line); border-radius:10px; overflow:hidden}
.cell{background:var(--ink); padding:26px 24px}
.cell .n{font-family:var(--mono); font-size:12px; color:var(--accent); letter-spacing:.1em}
.cell h3{font-family:var(--display); font-weight:500; font-size:19px; margin:12px 0 8px}
.cell p{font-size:14.5px; color:var(--dim)}

/* ---- work / case cards ---- */
.cards{margin-top:30px; display:grid; gap:20px}
.case{background:var(--ink-2); border:1px solid var(--line); border-radius:12px; padding:28px 30px 24px; transition:border-color .2s, transform .2s}
a.case:hover{text-decoration:none; border-color:var(--line-3); transform:translateY(-2px)}
.case.flagship{border-color:var(--line-2); box-shadow:0 0 0 1px var(--accent-soft) inset}
.case .top{display:flex; justify-content:space-between; align-items:flex-start; gap:18px; flex-wrap:wrap}
.case .platform{font-family:var(--mono); font-size:12px; letter-spacing:.13em; text-transform:uppercase; color:var(--accent)}
.case .platform.data{color:var(--data)}
.case h3{font-family:var(--display); font-weight:600; font-size:23px; margin-top:8px; letter-spacing:-.01em; color:var(--text)}
.flag{font-family:var(--mono); font-size:11px; letter-spacing:.12em; text-transform:uppercase; color:var(--ink); background:var(--accent); padding:5px 9px; border-radius:5px; font-weight:600; white-space:nowrap}
.flag.ghost{background:transparent; color:var(--dim); border:1px solid var(--line-2)}
.grid2{margin-top:20px; display:grid; grid-template-columns:1.1fr 1fr; gap:30px}
.field{margin-bottom:15px}
.field .k{font-family:var(--mono); font-size:11.5px; letter-spacing:.1em; text-transform:uppercase; color:var(--faint); margin-bottom:5px}
.field .v{font-size:15.5px; color:var(--text)}
.field .v.sym{color:var(--symptom); font-family:var(--mono); font-weight:500}
.field .v.fix{color:var(--accent); font-family:var(--mono); font-weight:500}
.proof{margin-top:8px; padding-top:15px; border-top:1px solid var(--line); font-family:var(--mono); font-size:13.5px; color:var(--dim)}
.readmore{margin-top:14px; font-family:var(--mono); font-size:13px; color:var(--accent)}

/* ---- capabilities ---- */
.cap-cols{display:grid; grid-template-columns:1fr 1fr; gap:48px; margin-top:26px}
.cap-cols h4{font-family:var(--mono); font-size:12.5px; letter-spacing:.12em; text-transform:uppercase; color:var(--accent); margin-bottom:18px}
.cap-list{list-style:none; display:flex; flex-direction:column; gap:16px}
.cap-list li{display:flex; flex-direction:column; gap:4px; padding-left:16px; border-left:2px solid var(--line-2)}
.cap-list li b{color:var(--text); font-weight:600; font-size:15.5px}
.cap-list li .d{color:var(--dim); font-size:14px; line-height:1.5}

/* ---- buttons ---- */
.cta-row{margin-top:28px; display:flex; gap:14px; flex-wrap:wrap}
/* display:inline-block is load-bearing. Without it .btn is inline, so its padding overflows the
   line box instead of reserving space and any margin-top is ignored — fine inside .cta-row, which
   is flex and blockifies its children, broken anywhere else (it overlapped the paragraph above it
   in every .callout on for-game-studios.html). Blockified flex items are unaffected by this. */
.btn{display:inline-block; font-family:var(--mono); font-size:14px; font-weight:500; padding:13px 20px; border-radius:7px; border:1px solid var(--line-2); color:var(--text); transition:border-color .2s,background .2s}
.btn:hover{text-decoration:none; border-color:var(--accent)}
.btn.primary{background:var(--accent); color:var(--ink); border-color:var(--accent); font-weight:600}
.btn.primary:hover{background:var(--accent-2)}

/* ---- contact + footer ---- */
.contact h2{font-family:var(--display); font-weight:600; font-size:clamp(27px,4vw,38px); letter-spacing:-.01em; max-width:20ch}
.contact p{margin-top:16px; color:var(--dim); max-width:56ch}
footer.site{padding:26px 0; border-top:1px solid var(--line); font-family:var(--mono); font-size:12.5px; color:var(--faint)}
footer.site .wrap{display:flex; justify-content:space-between; flex-wrap:wrap; gap:8px}
footer.site a{color:var(--faint)} footer.site a:hover{color:var(--dim)}

/* ============================================================
   ARTICLE PAGES  (.prose lives inside .wrap.narrow)
   ============================================================ */
.article-head{padding:64px 0 34px; border-bottom:1px solid var(--line)}
.article-head .kicker{font-family:var(--mono); font-size:12px; letter-spacing:.14em; text-transform:uppercase; color:var(--accent); display:flex; gap:12px; flex-wrap:wrap; align-items:center}
.article-head .kicker.data{color:var(--data)}
.article-head h1{font-family:var(--display); font-weight:600; line-height:1.08; font-size:clamp(30px,4.6vw,50px); letter-spacing:-.02em; margin-top:18px; max-width:20ch}
.article-head .dek{margin-top:20px; font-size:clamp(17px,2vw,20px); color:var(--dim); max-width:60ch}
.article-meta{margin-top:24px; display:flex; gap:20px; flex-wrap:wrap; font-family:var(--mono); font-size:12.5px; color:var(--faint)}
.article-meta b{color:var(--dim); font-weight:500}

/* result banner — the measured headline of a case */
.result-banner{margin:34px 0 0; display:grid; gap:16px; grid-template-columns:1fr 1fr; }
@media (max-width:640px){ .result-banner{grid-template-columns:1fr} }
.stat{background:var(--ink-2); border:1px solid var(--line-2); border-radius:10px; padding:20px 22px}
.stat .k{font-family:var(--mono); font-size:11.5px; letter-spacing:.1em; text-transform:uppercase; color:var(--faint)}
.stat .v{font-family:var(--mono); font-weight:600; font-size:clamp(22px,3vw,30px); margin-top:8px}
.stat .v.sym{color:var(--symptom)} .stat .v.fix{color:var(--accent)}
.stat .sub{color:var(--dim); font-size:13.5px; margin-top:6px}

.prose{max-width:var(--maxw); margin:0 auto; padding:44px 28px 20px; font-size:17px}
.prose > *{max-width:var(--readw); margin-left:auto; margin-right:auto}
.prose h2{font-family:var(--display); font-weight:600; font-size:clamp(23px,3vw,30px); letter-spacing:-.01em; margin:52px auto 4px; padding-top:8px}
.prose h3{font-family:var(--display); font-weight:600; font-size:20px; margin:34px auto 2px}
.prose p{margin:18px auto; color:#D5DCE3}
.prose strong{color:var(--text); font-weight:600}
.prose em{color:var(--text)}
.prose a{border-bottom:1px solid var(--accent-soft)}
.prose ul,.prose ol{margin:18px auto; padding-left:24px; color:#D5DCE3}
.prose li{margin:9px 0}
.prose blockquote{margin:26px auto; padding:4px 0 4px 22px; border-left:3px solid var(--accent); color:var(--text); font-size:19px}
.prose blockquote cite{display:block; margin-top:10px; font-style:normal; font-family:var(--mono); font-size:13px; color:var(--dim)}

/* code + ASCII diagrams — must preserve whitespace, scroll horizontally, never wrap */
.prose pre{
  max-width:100%; margin:26px auto; padding:20px 22px; background:var(--ink-2);
  border:1px solid var(--line-2); border-radius:10px; overflow-x:auto;
  font-family:var(--mono); font-size:13px; line-height:1.5; color:#C9D3DC;
  -webkit-overflow-scrolling:touch;
}
.prose pre code{font-family:inherit; font-size:inherit; white-space:pre; color:inherit; background:none; padding:0; border:0}
.prose :not(pre) > code{font-family:var(--mono); font-size:.9em; background:var(--ink-3); border:1px solid var(--line); border-radius:4px; padding:1px 6px; color:var(--accent-2)}
/* Diagrams use Unicode box-drawing; force one system mono with consistent box metrics
   (the loaded Plex Mono webfont subset lacks the verticals, which broke alignment) and
   a tight line-height so the │ ║ segments connect between rows. */
.prose pre.diagram{background:var(--ink); color:var(--dim); font-size:12.5px;
  font-family:"Cascadia Code","Cascadia Mono","Consolas","DejaVu Sans Mono",ui-monospace,"Liberation Mono",monospace;
  line-height:1.2}
/* On phones, code/diagram blocks fill the column and scroll their content internally
   (box never exceeds the viewport). Only at desktop widths — where the viewport is
   guaranteed wide enough — do the boxes shrink-wrap to their content and diagrams get
   the extra breathing width. This avoids the width:fit-content + max-width overflow that
   dragged the whole page into horizontal scroll on mobile. */
.prose figure.wide, .prose pre.wide{max-width:100%}
@media (min-width:900px){
  .prose pre{width:fit-content}
  .prose figure.wide, .prose pre.wide{max-width:960px}
}

/* tables */
.prose .tablewrap{max-width:960px; margin:26px auto; overflow-x:auto}
.prose table{border-collapse:collapse; width:100%; font-size:14px; font-family:var(--mono)}
.prose th,.prose td{border:1px solid var(--line-2); padding:9px 14px; text-align:left}
.prose th{color:var(--accent); font-weight:600; background:var(--ink-2); letter-spacing:.02em}
.prose td{color:#C9D3DC}
.prose td.ok{color:var(--accent)} .prose td.bad{color:var(--symptom)}

/* figures: images + video with captions */
.prose figure{margin:32px auto}
.prose figure img,.prose figure video{width:100%; border:1px solid var(--line-2); border-radius:10px; background:var(--ink-2)}
.prose figcaption{margin-top:10px; font-family:var(--mono); font-size:12.5px; color:var(--faint); text-align:center}

/* video placeholder slot — the "show, don't tell" holder before Seb records */
.media-slot{max-width:960px; margin:32px auto; border:1px dashed var(--line-3); border-radius:12px; background:
  repeating-linear-gradient(-45deg, rgba(255,255,255,.012) 0 12px, transparent 12px 24px), var(--ink-2);
  aspect-ratio:16/9; display:flex; flex-direction:column; align-items:center; justify-content:center; gap:10px; text-align:center; padding:24px}
.media-slot .icn{width:44px; height:44px; border-radius:50%; border:1px solid var(--line-3); display:flex; align-items:center; justify-content:center; color:var(--accent)}
.media-slot .t{font-family:var(--mono); font-size:13px; color:var(--dim); letter-spacing:.02em}
.media-slot .s{font-family:var(--mono); font-size:12px; color:var(--faint); max-width:52ch}
.media-slot.tall{aspect-ratio:4/3}

/* details / progressive-disclosure ("open the internals") */
.prose details{max-width:var(--readw); margin:24px auto; border:1px solid var(--line-2); border-radius:10px; background:var(--ink-2); overflow:hidden}
.prose details[open]{background:var(--ink-2)}
.prose summary{cursor:pointer; padding:15px 20px; font-family:var(--mono); font-size:13.5px; color:var(--accent); list-style:none; display:flex; align-items:center; gap:10px}
.prose summary::-webkit-details-marker{display:none}
.prose summary::before{content:"▸"; color:var(--accent); transition:transform .2s}
.prose details[open] summary::before{transform:rotate(90deg)}
.prose details > *:not(summary){margin-left:20px; margin-right:20px}
.prose details > pre{max-width:none; margin:0 20px 18px}
.prose details[open] summary{border-bottom:1px solid var(--line-2)}
.prose details[open] > pre:first-of-type{margin-top:16px}

/* callouts: the confidentiality line, made a feature not an apology */
.callout{max-width:var(--readw); margin:28px auto; border-radius:10px; padding:18px 22px; font-size:15px; border:1px solid var(--line-2); background:var(--ink-2)}
.callout .lbl{font-family:var(--mono); font-size:11.5px; letter-spacing:.12em; text-transform:uppercase; margin-bottom:8px}
.callout.withheld{border-color:var(--symptom-soft); background:var(--symptom-soft)}
.callout.withheld .lbl{color:var(--symptom)}
.callout.note{border-left:3px solid var(--accent)}
.callout.note .lbl{color:var(--accent)}
.callout p{margin:6px 0 0; color:#D5DCE3}

/* a single inline math formula, rendered without a math lib */
.formula{max-width:var(--readw); margin:26px auto; text-align:center; font-family:var(--mono); font-size:16px; color:var(--text)}
.formula sub{font-size:.75em}

/* article footer / next */
.article-foot{border-top:1px solid var(--line); margin-top:48px; padding:40px 0 64px}
.article-foot .row{display:flex; justify-content:space-between; gap:20px; flex-wrap:wrap; align-items:center}
.next-list{margin-top:26px; display:grid; gap:14px; grid-template-columns:1fr 1fr}
@media (max-width:640px){ .next-list{grid-template-columns:1fr} }

/* ---- responsive ---- */
@media (max-width:760px){
  /* tighter pitch so the grid still reads as structure on a narrow viewport,
     and an earlier settle since the hero is shorter here */
  /* the baseline tiles have to change pitch too, or the boost and the baseline
     stop lining up at the handover */
  html{
    background-size:24px 24px,24px 24px,96px 96px,96px 96px;
  }
  body::before{
    height:700px;
    background-image:
      linear-gradient(to bottom,
        rgba(14,18,23,0) 0,
        rgba(14,18,23,0) 260px,
        rgba(14,18,23,.42) 700px),
      linear-gradient(var(--grid-minor) 1px,transparent 1px),
      linear-gradient(90deg,var(--grid-minor) 1px,transparent 1px),
      linear-gradient(var(--grid-major) 1px,transparent 1px),
      linear-gradient(90deg,var(--grid-major) 1px,transparent 1px);
    background-size:100% 100%,24px 24px,24px 24px,96px 96px,96px 96px;
  }
  .method-grid{grid-template-columns:1fr}
  .grid2{grid-template-columns:1fr; gap:16px}
  .cap-cols{grid-template-columns:1fr; gap:34px}
  .hero{padding:60px 0 52px}
  section{padding:52px 0}
}
@media (prefers-reduced-motion:reduce){ *{animation:none!important} .fill{transition:none!important} html{scroll-behavior:auto} a.case:hover{transform:none} a.feat:hover,a.mcase:hover,a.slim:hover{transform:none} }

/* ============================================================
   HOME v2 — featured work: hierarchy, hero numbers, varied charts
   Presentation only. Content, proof-tiering, confidentiality unchanged.
   ============================================================ */

/* --- proof bar (replaces the proof strip; equal-height guaranteed) --- */
.proofbar{margin-top:30px; display:grid; grid-template-columns:repeat(3,1fr); grid-auto-rows:1fr; align-items:stretch;
  gap:1px; background:var(--line); border:1px solid var(--line); border-radius:12px; overflow:hidden}
.proofbar .cell{background:var(--ink); padding:30px 28px; display:flex; flex-direction:column}
.proofbar .tag{font-family:var(--mono); font-size:11px; letter-spacing:.16em; text-transform:uppercase; color:var(--accent)}
.proofbar .pnum{font-family:var(--display); font-weight:600; font-size:clamp(24px,3.1vw,34px); letter-spacing:-.02em; line-height:1.02; margin:16px 0 8px; color:var(--text)}
.proofbar p{font-size:14px; color:var(--dim); margin-top:auto; padding-top:12px; line-height:1.5}

/* --- hero-scale numbers --- */
.hero-num{font-family:var(--display); font-weight:600; letter-spacing:-.035em; line-height:.86; color:var(--accent)}
.hero-num.mega{font-size:clamp(60px,11vw,128px)}
.hero-num.big{font-size:clamp(44px,7.5vw,92px)}
/* equation form: supporting label + giant figure, baseline-aligned (Rust maxULP) */
.hero-num.eq{display:flex; align-items:baseline; gap:.2em; flex-wrap:wrap; line-height:.9; color:var(--text)}
.hero-num.eq .lhs{font-size:clamp(26px,3.4vw,42px); letter-spacing:-.02em}
.hero-num.eq .zero{font-size:clamp(72px,11vw,132px); color:var(--accent); letter-spacing:-.04em}
.hero-num.eq .u{flex:0 0 100%; margin-top:14px}
.hero-num .u{display:block; font-family:var(--mono); font-size:13px; font-weight:500; letter-spacing:.04em; color:var(--dim); margin-top:16px; text-transform:uppercase; line-height:1.4}
/* before → after headline number */
.ba-num{font-family:var(--display); font-weight:600; letter-spacing:-.02em; line-height:1; font-size:clamp(34px,5.4vw,64px); display:flex; align-items:baseline; gap:.22em; flex-wrap:wrap}
.ba-num .from{color:var(--symptom)} .ba-num .arr{color:var(--faint); font-size:.62em} .ba-num .to{color:var(--accent)}
.ba-num .un{font-family:var(--mono); font-size:.26em; letter-spacing:.04em; color:var(--dim); font-weight:500; align-self:center}

/* --- featured case module --- */
.feat{display:block; border-top:1px solid var(--line-2); padding:clamp(40px,6vw,68px) 0; color:var(--text)}
.feat:hover{text-decoration:none}
.fhead{display:flex; justify-content:space-between; align-items:baseline; gap:16px; flex-wrap:wrap}
.feat .plat{font-family:var(--mono); font-size:12px; letter-spacing:.13em; text-transform:uppercase; color:var(--dim)}
.plat b,.mplat b{color:var(--text); font-weight:700; font-size:1.35em; letter-spacing:.02em}
.feat h3{font-family:var(--display); font-weight:600; font-size:clamp(27px,4vw,42px); letter-spacing:-.02em; line-height:1.03; margin:8px 0 0; color:var(--text); max-width:18ch}
.feat .lead{color:var(--dim); font-size:16.5px; line-height:1.55; max-width:52ch; margin-top:16px}
.feat .lead strong{color:var(--text); font-weight:500}
.feat .more{display:inline-block; margin-top:22px; font-family:var(--mono); font-size:13px; color:var(--accent); text-decoration:none}
.feat h3 a{color:inherit; text-decoration:none}
.feat h3 a:hover,.feat .more:hover{color:var(--accent-2)}
.feat-split{display:grid; grid-template-columns:1fr 1.08fr; gap:clamp(28px,4vw,54px); align-items:center; margin-top:32px}
.feat-split.media-left .col-b{order:-1}
.feat-num-row{display:grid; grid-template-columns:auto 1fr; gap:clamp(28px,5vw,60px); align-items:center; margin-top:30px}
.col-a{min-width:0} .col-b{min-width:0}

/* paired renders (Rust) */
.renders{display:grid; grid-template-columns:1fr 1fr; gap:8px}
.renders figure{margin:0}
.renders img{width:100%; border:1px solid var(--line-2); border-radius:8px}
.renders .rcap{font-family:var(--mono); font-size:11px; text-align:center; margin-top:7px; color:var(--dim)}
.renders .rcap.after{color:var(--accent)}

/* a credited-quote hero (Windrose) */
.quote-hero{border-left:3px solid var(--accent); padding:6px 0 6px 22px; margin-top:6px}
.quote-hero q{font-family:var(--display); font-weight:500; font-size:clamp(19px,2.3vw,26px); line-height:1.35; color:var(--text); quotes:none}
.quote-hero q:before,.quote-hero q:after{content:""}
.quote-hero .src{display:block; margin-top:14px; font-family:var(--mono); font-size:12.5px; color:var(--dim)}

/* --- inline charts (authored from real numbers; no method in shape/axes) --- */
.chart{width:100%; background:var(--ink-2); border:1px solid var(--line-2); border-radius:12px; padding:20px 22px}
.chart .clab{display:flex; justify-content:space-between; gap:12px; align-items:baseline; font-family:var(--mono); font-size:11px; letter-spacing:.08em; text-transform:uppercase; color:var(--faint); margin-bottom:16px}
.chart svg{width:100%; height:auto; display:block; overflow:visible}
.chart .cnote{margin-top:14px; font-family:var(--mono); font-size:12px; color:var(--dim); line-height:1.5}
.chart .cnote strong{color:var(--text); font-weight:600}
.chart text{font-family:var(--mono)}
.c-symptom{fill:var(--symptom)} .c-accent{fill:var(--accent)} .c-dim{fill:var(--dim)} .c-faint{fill:var(--faint)} .c-text{fill:var(--text)}
.s-symptom{stroke:var(--symptom)} .s-accent{stroke:var(--accent)} .s-line{stroke:var(--line-3)} .s-faint{stroke:var(--faint)}

/* horizontal magnitude bars inside a chart (Vurhonga / OTT ladder / frame breakdown) */
.hbars{display:flex; flex-direction:column; gap:12px}
.hbar{display:grid; grid-template-columns:88px 1fr auto; gap:14px; align-items:center}
.hbar .hk{font-family:var(--mono); font-size:11.5px; letter-spacing:.06em; text-transform:uppercase; color:var(--faint)}
.hbar .htrack{display:block; height:16px; background:var(--ink-3); border-radius:8px; overflow:hidden}
.hbar .hfill{display:block; height:100%; border-radius:8px}
.hbar .hfill.sym{background:var(--symptom); opacity:.72} .hbar .hfill.fix{background:var(--accent)} .hbar .hfill.neu{background:var(--ink-4)}
.hbar .hv{font-family:var(--mono); font-weight:600; font-size:14px; text-align:right; min-width:74px}
.hbar .hv.sym{color:var(--symptom)} .hbar .hv.fix{color:var(--accent)} .hbar .hv.neu{color:var(--dim)}

/* single stacked frame bar (GW2) */
.stackbar{height:34px; display:flex; border-radius:8px; overflow:hidden; border:1px solid var(--line-2)}
.stackbar span{display:flex; align-items:center; justify-content:center; font-family:var(--mono); font-size:11px; color:var(--ink); white-space:nowrap; overflow:hidden}
.stackbar .seg-sym{background:var(--symptom)} .stackbar .seg-a{background:var(--accent); opacity:.85} .stackbar .seg-n{background:var(--ink-4); color:var(--dim)}
.stack-legend{display:flex; gap:18px; flex-wrap:wrap; margin-top:14px; font-family:var(--mono); font-size:12px; color:var(--dim)}
.stack-legend i{display:inline-block; width:10px; height:10px; border-radius:2px; margin-right:7px; vertical-align:middle}

/* needle-in-haystack (haggis) */
.needle{height:22px; border-radius:6px; background:var(--ink-3); position:relative; overflow:hidden}
.needle i{position:absolute; top:0; bottom:0; left:0; width:.9%; background:var(--accent); box-shadow:0 0 12px var(--accent)}

/* --- hero-scale artifact placeholder (awe, method-free) --- */
.hero-slot{margin-top:14px; border:1px dashed var(--line-3); border-radius:14px; background:
  repeating-linear-gradient(-45deg, rgba(255,255,255,.012) 0 14px, transparent 14px 28px), var(--ink-2);
  min-height:clamp(200px,34vw,400px); display:flex; flex-direction:column; align-items:center; justify-content:center; gap:12px; text-align:center; padding:30px}
.hero-slot .icn{width:48px; height:48px; border-radius:50%; border:1px solid var(--line-3); display:flex; align-items:center; justify-content:center; color:var(--accent); font-size:18px}
.hero-slot .t{font-family:var(--mono); font-size:13px; color:var(--dim); letter-spacing:.03em}
.hero-slot .s{font-family:var(--mono); font-size:12px; color:var(--faint); max-width:60ch; line-height:1.55}

/* --- secondary compact grid --- */
.work-grid{margin-top:34px; display:grid; grid-template-columns:1fr 1fr; align-items:stretch;
  gap:1px; background:var(--line); border:1px solid var(--line); border-radius:12px; overflow:hidden}
.mcase{background:var(--ink-2); padding:30px 30px 28px; display:flex; flex-direction:column; gap:14px; color:var(--text)}
.mcase .mtop{display:flex; justify-content:space-between; align-items:flex-start; gap:14px}
.mcase .mplat{font-family:var(--mono); font-size:11px; letter-spacing:.12em; text-transform:uppercase; color:var(--dim)}
.mcase h4{font-family:var(--display); font-weight:600; font-size:21px; letter-spacing:-.01em; margin-top:6px; line-height:1.1}
.mcase h4 a{color:inherit; text-decoration:none}
.mcase h4 a:hover,.mcase .mmore:hover{color:var(--accent-2)}
.mcase .msym{font-size:14.5px; color:var(--dim); line-height:1.5}
.mcase .mfig{margin-top:auto; padding-top:6px}
.mcase .mmore{display:inline-block; font-family:var(--mono); font-size:12.5px; color:var(--accent); margin-top:4px; text-decoration:none}

/* --- tertiary slim rows --- */
.slim{display:grid; grid-template-columns:200px 1fr auto; gap:24px; align-items:center;
  border-top:1px solid var(--line); padding:26px 4px; color:var(--text)}
.slim:last-of-type{border-bottom:1px solid var(--line)}
.slim .sfig{font-family:var(--display); font-weight:600; font-size:clamp(16px,1.8vw,20px); letter-spacing:-.01em; color:var(--dim)}
.slim .sfig .ok{color:var(--accent)} .slim .sfig .no{color:var(--symptom)}
.slim .sbody .sh{font-family:var(--display); font-weight:600; font-size:19px; letter-spacing:-.01em}
.slim .sbody .sh a{color:inherit; text-decoration:none}
.slim .sbody .sd{font-size:14px; color:var(--dim); margin-top:3px; max-width:64ch}
.slim .sgo{display:inline-block; font-family:var(--mono); font-size:12.5px; color:var(--accent); white-space:nowrap; text-decoration:none}
.slim .sh a:hover,.slim .sgo:hover{color:var(--accent-2)}

/* --- responsive: home v2 --- */
@media (max-width:820px){
  .feat-split,.feat-num-row{grid-template-columns:1fr; gap:26px}
  .feat-split.media-left .col-b{order:0}
  .work-grid{grid-template-columns:1fr}
}
@media (max-width:620px){
  .proofbar{grid-template-columns:1fr}
  .slim{grid-template-columns:1fr; gap:8px}
  .slim .sgo{margin-top:6px}
  .hbar{grid-template-columns:64px 1fr auto; gap:10px}
}

/* ============================================================
   PRISM SYNTAX HIGHLIGHTING — no external theme; token colours
   mapped to the site palette. The .prose pre box (padding, bg,
   border, scroll) and .prose pre code (mono font) already style
   the block; these rules only colour the tokens Prism emits.
   ============================================================ */
code[class*="language-"], pre[class*="language-"]{ color:#C9D3DC; text-shadow:none; tab-size:4 }
.token.comment,.token.prolog,.token.doctype,.token.cdata{ color:var(--faint); font-style:italic }
.token.punctuation{ color:var(--dim) }
.token.operator{ color:var(--dim) }
.token.keyword,.token.important,.token.atrule,.token.decorator,.token.tag{ color:var(--accent) }
.token.boolean,.token.number,.token.constant{ color:var(--data) }
.token.string,.token.char,.token.template-string,.token.attr-value,.token.regex{ color:var(--symptom) }
.token.function,.token.class-name,.token.method{ color:var(--accent-2) }
.token.builtin,.token.property,.token.variable,.token.parameter{ color:#C9D3DC }
.token.deleted{ color:var(--symptom) } .token.inserted{ color:var(--accent) }

/* ============================================================
   INTERACTIVE FLOATING-POINT DEMO (Rust article)
   Shows the exact input code and its live, in-browser output.
   ============================================================ */
.fp-demo{max-width:820px; margin:30px auto; border:1px solid var(--line-2); border-radius:12px;
  background:var(--ink-2); overflow:hidden}
.fp-head{display:flex; align-items:center; justify-content:space-between; gap:14px; flex-wrap:wrap;
  padding:16px 20px; border-bottom:1px solid var(--line-2); background:var(--ink)}
.fp-head .fp-title{font-family:var(--mono); font-size:12.5px; letter-spacing:.06em; text-transform:uppercase; color:var(--accent)}
.fp-run{font-family:var(--mono); font-size:13px; font-weight:600; color:var(--ink); background:var(--accent);
  border:0; border-radius:7px; padding:8px 16px; cursor:pointer; white-space:nowrap; transition:background .15s, transform .05s}
.fp-run:hover{background:var(--accent-2)} .fp-run:active{transform:translateY(1px)}
.fp-intro{font-size:14.5px; color:var(--dim); line-height:1.55; margin:0; padding:16px 20px 4px}
.fp-head .fp-head-l{display:flex; flex-direction:column; gap:3px}
.fp-hint{font-family:var(--mono); font-size:11.5px; color:var(--faint); line-height:1.4; margin:0; text-transform:none; letter-spacing:0}
.fp-case{padding:14px 20px 18px}
.fp-tag{font-family:var(--mono); font-size:12px; letter-spacing:.1em; text-transform:uppercase;
  font-weight:600; color:var(--text); margin-bottom:12px; padding-left:11px; border-left:2px solid var(--accent)}
/* the live "annotated run": each line IS the code — the expression, its live value, and what it does */
.fp-out{font-family:var(--mono); font-size:13px; background:var(--ink);
  border:1px solid var(--line-2); border-radius:9px; padding:15px 16px; overflow-anchor:none}
.fp-out .trace{display:block; white-space:pre; overflow-x:auto; line-height:1.9}
.fp-out .expr{color:#C9D3DC}
.fp-out .eq{color:var(--faint)}
.fp-out .val{color:var(--text); font-weight:600; border-radius:3px}
.fp-out .pending{color:var(--faint); font-weight:400}
.fp-out .cmt{color:var(--faint); font-style:italic}
.fp-out mark{background:none; color:var(--symptom); font-weight:700}   /* the digits that diverge */
.fp-out .verdict{margin-top:11px; padding-top:11px; border-top:1px dashed var(--line-2);
  color:var(--accent); line-height:1.5}
.fp-out .verdict b{color:var(--symptom)}
.fp-out .verdict.pending{color:var(--faint)}
.fp-foot{font-size:14px; color:var(--dim); line-height:1.6; margin:0; padding:6px 20px 20px}
.fp-foot strong{color:var(--text); font-weight:600}
@media (max-width:620px){ .fp-out{font-size:12px} }