/* ══════════════════════════════════════════════════════════════
   lab.css — shared stylesheet, Brainsless Research Lab
   "A research lab, not a landing page."
   ══════════════════════════════════════════════════════════════ */

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}

:root{
  --paper:#FFFFFF;
  --paper-2:#FAF7F7;
  --ink:#171515;
  --ink-2:#423F3F;
  --ink-3:#756F70;
  --ink-4:#A79FA0;
  --accent:#C98B93;
  --accent-soft:#F3E4E6;
  --accent-2:#B36F78;
  --border:#E7E2E2;
  --serif:'Newsreader',Georgia,serif;
  --sans:'Geist',system-ui,sans-serif;
}

html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;overflow-x:clip;width:100%}
img,svg{max-width:100%;height:auto}
body{
  font-family:var(--sans);
  font-size:16.5px;
  line-height:1.65;
  color:var(--ink-2);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  overflow-x:clip;
}
a{color:inherit}
h1,h2,h3,h4{font-family:var(--serif);font-weight:400;color:var(--ink)}
em,.em{font-style:italic;color:inherit}

/* ── LAYOUT ─────────────────────────────────────────────────── */
.wrap{max-width:1120px;margin:0 auto;padding:0 clamp(24px,5vw,80px)}
.prose{max-width:680px;margin:0 auto}
.sec{padding:clamp(64px,9vh,100px) clamp(24px,5vw,80px);max-width:1120px;margin:0 auto}
.sec-label{
  font-family:var(--sans);
  font-size:11px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;
  color:var(--accent);margin-bottom:40px;
  display:flex;align-items:center;gap:12px;
}
.sec-label::after{content:'';flex:1;height:1px;background:var(--border)}

/* ── NAV ────────────────────────────────────────────────────── */
.nav{
  position:static;width:100%;z-index:100;
  display:flex;align-items:center;justify-content:space-between;
  padding:24px clamp(24px,5vw,80px);
  background:var(--paper);
  transition:box-shadow .25s;
}
.nav.s{box-shadow:0 1px 0 var(--border)}
.nav-logo{
  font-family:var(--sans);font-size:14px;font-weight:600;
  color:var(--ink);text-decoration:none;letter-spacing:.02em;text-transform:uppercase;
}
.nav-links{display:flex;align-items:center;gap:28px;list-style:none}
.nav-links a{font-family:var(--sans);font-size:14px;color:var(--ink-3);text-decoration:none;transition:color .2s}
.nav-links a:hover{color:var(--ink)}
@media(max-width:700px){.nav-links{display:none}.nav{padding:16px 24px}}

/* ── FOOTER ─────────────────────────────────────────────────── */
.footer{
  padding:40px clamp(24px,5vw,80px);
  border-top:1px solid var(--border);
  display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;
}
.footer-links{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-4)}
.footer-links a{color:var(--ink-3);text-decoration:none}
.footer-links a:hover{color:var(--accent)}

/* ── BUTTONS ────────────────────────────────────────────────── */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  font-family:var(--sans);font-size:14px;font-weight:500;letter-spacing:-.01em;
  padding:13px 24px;border-radius:6px;text-decoration:none;cursor:pointer;
  transition:background .18s,color .18s,border-color .18s,transform .15s;
}
.btn-primary{background:var(--ink);color:#fff;border:1px solid var(--ink)}
.btn-primary:hover{background:#000;transform:translateY(-1px)}
.btn-secondary{background:transparent;color:var(--ink);border:1px solid var(--ink)}
.btn-secondary:hover{background:var(--ink);color:#fff}

/* ── BADGE ──────────────────────────────────────────────────── */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--sans);font-size:11px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;
  color:var(--accent-2);background:var(--accent-soft);
  padding:5px 11px;border-radius:99px;
}

/* ── CARDS ──────────────────────────────────────────────────── */
.card-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
@media(max-width:760px){.card-grid{grid-template-columns:1fr}}
.card{
  background:var(--paper);border:1px solid var(--border);border-radius:10px;
  padding:clamp(24px,3vw,32px);transition:box-shadow .25s,transform .25s,border-color .25s;
}
.card:hover{box-shadow:0 8px 40px rgba(23,21,21,.06);transform:translateY(-2px);border-color:var(--ink-4)}

/* ── CAPABILITY BLOCKS (release pages) ─────────────────────── */
.cap-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--border);border:1px solid var(--border);border-radius:10px;overflow:hidden}
@media(max-width:900px){.cap-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.cap-grid{grid-template-columns:1fr}}
.cap-block{background:var(--paper);padding:clamp(24px,3vw,32px)}
.cap-block-label{font-family:var(--sans);font-size:13px;font-weight:600;color:var(--ink);margin-bottom:8px}
.cap-block-body{font-size:13.5px;color:var(--ink-3);line-height:1.7}

/* ── PAPER PAGE ─────────────────────────────────────────────── */
.paper-hero{padding:clamp(56px,8vh,88px) clamp(24px,5vw,80px) clamp(40px,5vh,56px);max-width:1120px;margin:0 auto}
.paper-meta{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:20px;font-size:12px;color:var(--ink-4)}
.paper-stat-row{display:flex;gap:1px;background:var(--border);border:1px solid var(--border);border-radius:10px;overflow:hidden;margin:32px 0}
@media(max-width:640px){.paper-stat-row{flex-direction:column}}
.paper-stat{flex:1;background:var(--paper);padding:22px 24px}
.paper-stat-val{font-family:var(--serif);font-size:clamp(26px,2.6vw,36px);color:var(--ink);line-height:1}
.paper-stat-key{font-family:var(--sans);font-size:11px;color:var(--ink-4);letter-spacing:.08em;text-transform:uppercase;margin-top:6px}
.paper-chart-wrap{border:1px solid var(--border);border-radius:10px;padding:clamp(20px,3vw,32px);margin:32px 0}
.paper-limits{border-left:2px solid var(--accent);background:var(--accent-soft);border-radius:0 8px 8px 0;padding:20px 24px;margin:32px 0}

/* ── 3-COLUMN ARTICLE LAYOUT (long-form pages) ─────────────── */
.article-grid{
  display:grid;
  grid-template-columns:200px minmax(0,680px) 260px;
  gap:56px;
  max-width:1120px;margin:0 auto;
  padding:clamp(48px,7vh,80px) clamp(24px,5vw,80px);
  align-items:start;
}
.article-toc{position:sticky;top:32px;font-size:13px}
.article-toc-label{font-family:var(--sans);font-size:11px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-4);margin-bottom:14px}
.article-toc ol,.article-toc ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.article-toc a{display:block;color:var(--ink-3);text-decoration:none;line-height:1.4;transition:color .2s}
.article-toc a:hover,.article-toc a.active{color:var(--accent-2)}
.article-body{min-width:0}
.article-notes{font-size:13px;color:var(--ink-3)}
.article-notes-label{font-family:var(--sans);font-size:11px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-4);margin-bottom:14px}
.article-notes .note{padding-bottom:18px;margin-bottom:18px;border-bottom:1px solid var(--border);line-height:1.6}
.article-notes .note:last-child{border-bottom:none}
@media(max-width:1000px){
  .article-grid{grid-template-columns:1fr;gap:32px}
  .article-toc{position:static;border-bottom:1px solid var(--border);padding-bottom:24px}
  .article-notes{border-top:1px solid var(--border);padding-top:24px}
}

/* ── NEURON FIELD TEXTURE ───────────────────────────────────── */
.neuron-field{
  background:var(--ink);
  -webkit-mask-image:url('/assets/neurons_mask.png');
  mask-image:url('/assets/neurons_mask.png');
  -webkit-mask-size:cover;mask-size:cover;
  -webkit-mask-position:center;mask-position:center;
  -webkit-mask-repeat:no-repeat;mask-repeat:no-repeat;
}

/* ── NEURON HERO BANNER (product & paper pages) ─────────────────
   A rounded, color-tinted panel carrying the neuron texture, sitting
   behind the page's hero header. Same motif as the landing orb stage,
   but contained with rounded edges and a soft accent wash. */
.neuron-hero{
  position:relative;
  border-radius:16px;
  background:linear-gradient(180deg,var(--accent-soft) 0%,var(--paper) 92%);
  border:1px solid var(--border);
  overflow:hidden;
  padding:clamp(40px,6vw,64px) clamp(24px,5vw,64px);
  margin-bottom:clamp(32px,5vh,48px);
}
.neuron-hero::before{
  content:'';position:absolute;inset:0;
  background:var(--accent);
  -webkit-mask-image:url('/assets/neurons_mask.png');mask-image:url('/assets/neurons_mask.png');
  -webkit-mask-size:cover;mask-size:cover;
  -webkit-mask-position:center;mask-position:center;
  -webkit-mask-repeat:no-repeat;mask-repeat:no-repeat;
  opacity:.5;pointer-events:none;
}
.neuron-hero>*{position:relative;z-index:1}

/* ── PIXEL GLYPHS (pixel-lab.js canvases) ───────────────────────
   The lab's shared visual language: animated pixel scenes drawn in
   rose ink. Size always comes from CSS; keep canvases square. */
.lab-mark{width:28px;height:28px;flex:none}
.sec-wash{position:absolute;z-index:-1;width:min(440px,36vw);height:min(440px,36vw);opacity:.06;pointer-events:none}
@media(max-width:700px){.sec-wash{display:none}}

/* ── REVEAL (single fade-in on load only — not scroll-cascade) ─ */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s ease}
.reveal.v{opacity:1;transform:none}