/* ============================================================================
   Future of Sports · Lab — research site
   FSP web token system: lime + navy on white/light. Switzer (UI/body),
   Instrument Serif (display headlines), JetBrains Mono (labels/ASCII).
   All graphics are HTML/CSS layout or monospace <pre> — no positioned SVG text.
   ============================================================================ */

:root{
  /* Brand — lime primary, navy ink */
  --lime:#c8f23c;
  --lime-bright:#d4ff4a;
  --lime-accent:#84cc16;
  --lime-deep:#7fae16;
  --lime-hover:#b8e62c;
  --navy:#0a2540;
  --ink:#0b1428;
  --blue:#2a6ef0;

  /* Text */
  --t-heading:#0a2540;
  --t-body:#425466;
  --t-body-alt:#475569;
  --t-muted:#64748b;
  --t-faint:#94a3b8;
  --t-inverse:#ffffff;

  /* Surfaces */
  --s-page:#ffffff;
  --s-page-warm:#f7f7f4;
  --s-card:#ffffff;
  --s-wash:#f6f8fc;
  --s-wash-lime:#f1f5e8;
  --s-track:#eef2f8;

  /* Borders */
  --b-default:rgba(10,37,64,0.09);
  --b-subtle:rgba(10,37,64,0.06);
  --b-strong:rgba(10,37,64,0.14);

  /* Category dots */
  --cat-verification:#7fae16;
  --cat-systems:#2a6ef0;
  --cat-interfaces:#8257e6;
  --cat-trust:#0a2540;

  /* Type */
  --f-ui:'Switzer','Geist',-apple-system,BlinkMacSystemFont,sans-serif;
  --f-serif:'Instrument Serif',Georgia,serif;
  --f-mono:'JetBrains Mono','Geist Mono',ui-monospace,Menlo,monospace;

  /* Geometry */
  --r-sm:7px; --r-md:12px; --r-lg:14px; --r-xl:18px; --r-pill:999px;
  --content:1200px;
  --gutter:40px;
  --measure:44rem;

  --ease-ui:cubic-bezier(0.2,0.7,0.3,1);
}

*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  font-family:var(--f-ui);
  color:var(--t-body);
  background:var(--s-page);
  line-height:1.6;
  letter-spacing:-0.006em;
  font-size:17px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{color:var(--t-heading);font-weight:400;letter-spacing:-0.021em;line-height:1.08;margin:0;}
p{margin:0;}
a{color:inherit;text-decoration:none;}
img,svg{max-width:100%;}
.wrap{max-width:var(--content);margin:0 auto;padding:0 var(--gutter);}

/* ============================ Top bar ============================ */
.topbar{
  background:rgba(255,255,255,0.9);
  backdrop-filter:saturate(160%) blur(14px);
  -webkit-backdrop-filter:saturate(160%) blur(14px);
  border-bottom:1px solid var(--b-default);
  padding:15px var(--gutter);
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  position:sticky;top:0;z-index:20;
}
.brand{display:inline-flex;align-items:center;gap:12px;}
.brand .mark{width:9px;height:9px;border-radius:var(--r-pill);background:var(--navy);box-shadow:0 0 0 4px rgba(200,242,60,0.35);flex:none;}
.brand .name{font-family:var(--f-ui);font-weight:600;font-size:15px;color:var(--navy);letter-spacing:-0.01em;}
.brand .name .sub{color:var(--t-muted);font-weight:500;}
.brand .tag{font-family:var(--f-mono);font-size:11px;font-weight:500;letter-spacing:0.14em;text-transform:uppercase;color:var(--t-muted);border:1px solid var(--b-default);border-radius:var(--r-sm);padding:3px 8px;}
.topbar-right{display:flex;align-items:center;gap:20px;}
.topnav a{font-family:var(--f-mono);font-size:12px;letter-spacing:0.02em;color:var(--t-muted);transition:color .15s var(--ease-ui);}
.topnav a:hover,.topnav a[aria-current="page"]{color:var(--navy);}
.back{font-family:var(--f-mono);font-size:12px;color:var(--t-muted);display:inline-flex;align-items:center;gap:7px;padding:6px 11px;border:1px solid var(--b-default);border-radius:var(--r-sm);transition:all .15s var(--ease-ui);}
.back:hover{border-color:var(--navy);color:var(--navy);}

/* ============================ Eyebrow ============================ */
.eyebrow{font-family:var(--f-ui);font-size:12px;font-weight:600;letter-spacing:0.18em;text-transform:uppercase;color:var(--t-muted);display:inline-flex;align-items:center;gap:9px;}
.eyebrow .dot{width:7px;height:7px;border-radius:var(--r-pill);background:var(--lime-accent);box-shadow:0 0 0 4px rgba(132,204,22,0.16);}

/* ============================ Category badge ============================ */
.badge{
  display:inline-flex;align-items:center;gap:7px;
  font-family:var(--f-mono);font-size:11px;font-weight:500;letter-spacing:0.12em;text-transform:uppercase;
  color:var(--navy);background:var(--s-wash-lime);
  border-radius:var(--r-pill);padding:4px 11px;
}
.badge::before{content:"";width:6px;height:6px;border-radius:var(--r-pill);background:var(--cat,var(--lime-accent));}
.badge.verification{--cat:var(--cat-verification);}
.badge.systems{--cat:var(--cat-systems);}
.badge.interfaces{--cat:var(--cat-interfaces);}
.badge.trust{--cat:var(--cat-trust);}

/* ============================ ASCII thumbnail panels ============================ */
.ascii-panel{
  position:relative;
  aspect-ratio:16/9;
  background:var(--s-page-warm);
  border:1px solid var(--b-strong);
  border-radius:var(--r-md);
  display:flex;align-items:center;justify-content:center;
  overflow:hidden;
  padding:12px;
}
.ascii-panel::before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--lime);}
.ascii-panel pre{
  font-family:var(--f-mono);
  color:var(--navy);
  font-weight:500;
  margin:0;
  white-space:pre;
  line-height:1.16;
  letter-spacing:0;
  font-size:clamp(6px,1.7vw,9.5px);
}
.ascii-panel .a{color:var(--lime-deep);font-weight:700;}
.ascii-panel .n{color:var(--navy);font-weight:700;}
.ascii-panel .m{color:var(--t-faint);}

/* ============================ Hero featured ============================ */
.hero{
  background:linear-gradient(180deg,#ffffff 0%,var(--s-page-warm) 100%);
  border-bottom:1px solid var(--b-default);
  padding:56px var(--gutter) 64px;
}
.hero .kicker{margin-bottom:38px;max-width:660px;}
.hero .kicker .t{margin-top:14px;font-family:var(--f-serif);font-size:clamp(26px,3.6vw,40px);line-height:1.02;color:var(--navy);letter-spacing:-0.02em;}
.feature{display:grid;grid-template-columns:1.08fr 0.92fr;gap:44px;align-items:center;}
@media(max-width:860px){.feature{grid-template-columns:1fr;gap:26px;}.feature .fx{order:-1;}}
.feature .ascii-panel{aspect-ratio:16/9;}
.feature .ascii-panel pre{font-size:clamp(8px,1.5vw,13.5px);}
.feature .meta{display:flex;gap:14px;align-items:center;flex-wrap:wrap;margin-bottom:16px;}
.feature .date{font-family:var(--f-mono);font-size:12px;color:var(--t-muted);letter-spacing:0.02em;}
.feature h1{font-family:var(--f-serif);font-size:clamp(32px,4.6vw,52px);line-height:1.0;letter-spacing:-0.02em;margin:0 0 18px;}
.feature h1 a:hover{color:var(--navy);text-decoration:underline;text-underline-offset:5px;text-decoration-thickness:1px;}
.feature .dek{font-size:18px;line-height:1.55;color:var(--t-body);margin:0 0 24px;max-width:34rem;}
.feature .readmore{font-family:var(--f-mono);font-size:13px;font-weight:500;letter-spacing:0.03em;color:var(--navy);display:inline-flex;align-items:center;gap:8px;border-bottom:2px solid var(--lime);padding-bottom:3px;transition:gap .15s var(--ease-ui);}
.feature .readmore:hover{gap:12px;}

/* ============================ Sections ============================ */
main{max-width:var(--content);margin:0 auto;padding:60px var(--gutter) 40px;}
.sec-head{display:flex;align-items:baseline;gap:16px;margin-bottom:28px;padding-bottom:14px;border-bottom:1px solid var(--b-subtle);}
.sec-head .h{font-family:var(--f-mono);font-size:12px;font-weight:600;letter-spacing:0.14em;text-transform:uppercase;color:var(--lime-deep);}
.sec-head .s{font-size:14px;color:var(--t-muted);margin-left:auto;}

/* ============================ Card grid ============================ */
.grid{display:grid;gap:22px;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));}
a.card{
  display:flex;flex-direction:column;gap:0;
  border-radius:var(--r-md);
  transition:transform .18s var(--ease-ui);
}
a.card:hover{transform:translateY(-3px);}
a.card:hover .ascii-panel{border-color:var(--navy);}
.card .cbody{padding:16px 2px 0;}
.card .meta{display:flex;gap:12px;align-items:center;margin-bottom:12px;}
.card .date{font-family:var(--f-mono);font-size:11.5px;color:var(--t-muted);}
.card h3{font-family:var(--f-serif);font-size:24px;line-height:1.05;letter-spacing:-0.015em;color:var(--t-heading);margin:0 0 9px;}
a.card:hover h3{text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px;}
.card .dek{font-size:14.5px;line-height:1.5;color:var(--t-muted);}

/* ============================ Publications list ============================ */
.pubs{max-width:var(--content);margin:0 auto;padding:20px var(--gutter) 84px;}
.pub{display:grid;grid-template-columns:120px 1fr auto;gap:24px;align-items:baseline;padding:20px 0;border-top:1px solid var(--b-subtle);}
.pub:last-child{border-bottom:1px solid var(--b-subtle);}
.pub .pdate{font-family:var(--f-mono);font-size:12px;color:var(--t-faint);letter-spacing:0.02em;}
.pub .ptitle{font-size:17px;color:var(--t-heading);letter-spacing:-0.01em;}
.pub a:hover .ptitle{text-decoration:underline;text-underline-offset:3px;}
.pub .pdek{font-size:14px;color:var(--t-muted);margin-top:3px;}
@media(max-width:640px){.pub{grid-template-columns:1fr;gap:6px;}}

/* ============================ Footer ============================ */
footer.foot{max-width:var(--content);margin:0 auto;padding:30px var(--gutter);border-top:1px solid var(--b-default);color:var(--t-faint);font-family:var(--f-mono);font-size:11px;letter-spacing:0.06em;text-transform:uppercase;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;}
footer.foot a:hover{color:var(--navy);}

/* ============================ Article ============================ */
.article{padding:34px var(--gutter) 40px;max-width:var(--content);margin:0 auto;}
.article-head{max-width:var(--measure);margin:0 auto 44px;}
.article-head .meta{display:flex;gap:16px;align-items:center;flex-wrap:wrap;margin-bottom:22px;}
.article-head .date{font-family:var(--f-mono);font-size:13px;color:var(--t-muted);letter-spacing:0.02em;}
.article-head h1{font-family:var(--f-serif);font-size:clamp(36px,5.2vw,60px);line-height:0.99;letter-spacing:-0.02em;margin:0 0 26px;}
.article-head .byline{display:flex;align-items:center;gap:13px;font-size:14.5px;color:var(--t-body);border-top:1px solid var(--b-subtle);padding-top:20px;}
.article-head .byline .avatar{width:36px;height:36px;border-radius:50%;background:var(--navy);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-family:var(--f-mono);font-size:12px;font-weight:600;letter-spacing:0.02em;flex:none;}
.article-head .byline .who b{font-weight:600;color:var(--navy);}
.article-head .byline .who span{color:var(--t-muted);}

.prose{max-width:var(--measure);margin:0 auto;font-size:17.5px;}
.prose .lede{font-family:var(--f-serif);font-size:clamp(24px,3vw,30px);line-height:1.22;color:var(--navy);margin:0 0 10px;letter-spacing:-0.015em;}
.prose h2{font-family:var(--f-serif);font-size:clamp(26px,3vw,32px);line-height:1.06;letter-spacing:-0.018em;margin:56px 0 6px;color:var(--navy);}
.prose h3{font-family:var(--f-ui);font-size:19px;font-weight:600;margin:36px 0 2px;color:var(--navy);letter-spacing:-0.01em;}
.prose p{margin:18px 0;color:var(--t-body);}
.prose p strong,.prose li strong{color:var(--navy);font-weight:600;}
.prose a{color:var(--navy);text-decoration:underline;text-decoration-color:var(--lime-deep);text-underline-offset:3px;text-decoration-thickness:1.5px;}
.prose a:hover{text-decoration-color:var(--navy);}
.prose ul,.prose ol{padding-left:22px;margin:18px 0;color:var(--t-body);}
.prose li{margin:9px 0;}
.prose em{font-style:italic;}
.prose blockquote{margin:30px 0;padding:6px 0 6px 24px;border-left:3px solid var(--lime);color:var(--navy);font-family:var(--f-serif);font-size:clamp(22px,2.6vw,27px);line-height:1.25;letter-spacing:-0.01em;}

/* figures */
figure{margin:40px 0;}
figure figcaption{font-family:var(--f-mono);font-size:12px;color:var(--t-muted);margin-top:14px;line-height:1.55;letter-spacing:0.01em;}

/* in-article ASCII diagram (wider, framed) */
.ascii-fig{background:var(--s-page-warm);border:1px solid var(--b-strong);border-radius:var(--r-md);padding:26px 22px;overflow-x:auto;position:relative;}
.ascii-fig::before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--lime);}
.ascii-fig pre{font-family:var(--f-mono);color:var(--navy);font-weight:500;margin:0;white-space:pre;line-height:1.32;font-size:clamp(9px,1.7vw,13px);}
.ascii-fig .a{color:var(--lime-deep);font-weight:700;}
.ascii-fig .n{color:var(--navy);font-weight:700;}
.ascii-fig .m{color:var(--t-faint);}

/* ---- Carousel-style data-viz: bars (pure CSS grid, no SVG) ---- */
.viz{background:var(--s-card);border:1px solid var(--b-default);border-radius:var(--r-md);padding:28px 28px 26px;position:relative;}
.viz::before{content:"";position:absolute;top:0;left:0;width:100%;height:2px;background:var(--lime);border-radius:var(--r-md) var(--r-md) 0 0;}
.viz .vhead{font-family:var(--f-mono);font-size:11px;font-weight:600;letter-spacing:0.14em;text-transform:uppercase;color:var(--lime-deep);margin-bottom:22px;}
.bars{display:grid;gap:20px;}
.bar-row{display:grid;grid-template-columns:minmax(96px,190px) 1fr minmax(70px,auto);align-items:center;gap:20px;}
.bar-label{font-family:var(--f-mono);font-size:12px;font-weight:800;letter-spacing:0.03em;text-transform:uppercase;color:var(--navy);}
.bar-track{height:24px;background:rgba(10,37,64,0.10);border-radius:var(--r-pill);overflow:hidden;}
.bar-fill{height:100%;border-radius:var(--r-pill);background:var(--navy);min-width:6px;}
.bar-fill.lime{background:var(--lime-deep);}
.bar-val{font-family:var(--f-ui);font-size:28px;font-weight:700;letter-spacing:-0.02em;color:var(--navy);text-align:right;line-height:1;white-space:nowrap;}
.bar-val .u{font-size:15px;font-weight:600;color:var(--t-muted);margin-left:2px;}
.viz .vnote{margin-top:22px;font-size:13.5px;color:var(--t-muted);line-height:1.55;}
@media(max-width:560px){
  .bar-row{grid-template-columns:1fr auto;grid-template-areas:"lab lab" "trk val";row-gap:9px;column-gap:16px;}
  .bar-label{grid-area:lab;}.bar-track{grid-area:trk;}.bar-val{grid-area:val;}
}

/* ---- Big stat numbers (pure CSS) ---- */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:30px 40px;}
.stat .statnum{font-family:var(--f-serif);font-size:clamp(56px,9vw,104px);line-height:0.86;letter-spacing:-0.03em;color:var(--navy);}
.stat .statnum .u{font-family:var(--f-ui);font-size:0.26em;font-weight:600;letter-spacing:-0.01em;color:var(--t-muted);}
.stat .statnum.lime{color:var(--lime-deep);}
.stat .statlabel{font-family:var(--f-mono);font-size:12px;font-weight:500;letter-spacing:0.09em;text-transform:uppercase;color:var(--t-muted);margin-top:12px;line-height:1.45;}

/* ---- CSS schematic (boxes + flow, no SVG text) ---- */
.schema{display:flex;align-items:stretch;gap:0;flex-wrap:wrap;}
.schema .node{
  flex:1 1 150px;min-width:140px;
  background:var(--s-card);border:1px solid var(--b-strong);border-radius:var(--r-md);
  padding:16px 16px 14px;position:relative;
}
.schema .node.lime{background:var(--s-wash-lime);border-color:#dbe8bd;}
.schema .node .k{font-family:var(--f-mono);font-size:10px;font-weight:600;letter-spacing:0.12em;text-transform:uppercase;color:var(--lime-deep);}
.schema .node h4{font-family:var(--f-ui);font-size:15px;font-weight:600;color:var(--navy);margin:6px 0 4px;letter-spacing:-0.01em;}
.schema .node p{font-size:12.5px;line-height:1.5;color:var(--t-muted);}
.schema .arrow{flex:0 0 40px;display:flex;align-items:center;justify-content:center;color:var(--t-faint);font-family:var(--f-mono);font-size:18px;}
@media(max-width:620px){
  .schema{flex-direction:column;}
  .schema .arrow{flex:0 0 auto;height:26px;transform:rotate(90deg);}
}

/* two-column labelled comparison (verified vs rendered, pass vs fail) */
.duo{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.duo .col{border:1px solid var(--b-strong);border-radius:var(--r-md);padding:18px 20px;background:var(--s-card);}
.duo .col.ok{border-left:3px solid var(--lime-accent);}
.duo .col.warn{border-left:3px solid #d08700;}
.duo .col .k{font-family:var(--f-mono);font-size:10px;font-weight:600;letter-spacing:0.12em;text-transform:uppercase;color:var(--t-muted);margin-bottom:6px;}
.duo .col h4{font-family:var(--f-ui);font-size:16px;font-weight:600;color:var(--navy);margin-bottom:6px;letter-spacing:-0.01em;}
.duo .col p{font-size:13px;line-height:1.55;color:var(--t-muted);}
@media(max-width:560px){.duo{grid-template-columns:1fr;}}

/* ---- honest-limits note ---- */
.note{border:1px solid var(--b-default);background:var(--s-wash);border-left:3px solid var(--lime);border-radius:var(--r-sm);padding:24px 26px;margin:38px 0;}
.note .h{font-family:var(--f-mono);font-size:11px;font-weight:600;letter-spacing:0.12em;text-transform:uppercase;color:var(--lime-deep);margin:0 0 10px;}
.note p{margin:12px 0;font-size:15.5px;color:var(--t-body);}
.note p:first-of-type{margin-top:0;}
.note p:last-child{margin-bottom:0;}
.note a{color:var(--navy);text-decoration:underline;text-decoration-color:var(--lime-deep);text-underline-offset:3px;}

/* article footer nav */
.article-foot{max-width:var(--measure);margin:60px auto 0;border-top:1px solid var(--b-subtle);padding-top:26px;font-family:var(--f-mono);font-size:13px;color:var(--t-muted);letter-spacing:0.01em;}
.article-foot a{color:var(--navy);font-weight:500;}
.article-foot a:hover{text-decoration:underline;text-underline-offset:3px;}

@media(max-width:720px){
  :root{--gutter:20px;}
  .hero{padding:40px 20px 44px;}
  main{padding:44px 20px 32px;}
  .article{padding:24px 20px 32px;}
  body{font-size:16px;}
}