/* AI Words — shared styles
   Layout: sticky top bar; navy hero band with live counters on the home page;
   1120px container; prose capped near 68ch; left-aligned throughout. */
:root{
  --paper:#F4F6FA; --surface:#FFFFFF; --ink:#13203A; --muted:#58657D; --rule:#DCE2EB;
  --navy:#0E1A36; --navy-2:#182A52; --on-navy:#E9EEF8; --on-navy-muted:#A9B6CF;
  --machine:#2F63E8; --machine-soft:rgba(47,99,232,.12); --machine-bright:#86A8FF;
  --human:#B26F12; --human-soft:rgba(178,111,18,.14); --human-bright:#F2B661;
  --s2:#0E8C77; --s3:#7E4BD0; --s4:#CC3D66;
  --f-display:"Bricolage Grotesque",ui-sans-serif,system-ui,sans-serif;
  --f-body:"IBM Plex Sans",ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;
  --wrap:1120px; --gutter:clamp(16px,4vw,32px); --radius:10px;
}
@media (prefers-color-scheme: dark){
  :root{
    --paper:#0B1220; --surface:#111B2E; --ink:#E4EAF4; --muted:#93A1B8; --rule:#22304A;
    --navy:#12224A; --navy-2:#1B2F5E;
    --machine:#7FA2FF; --machine-soft:rgba(127,162,255,.16);
    --human:#EDB15C; --human-soft:rgba(237,177,92,.16);
    --s2:#3CC7AE; --s3:#B28CF2; --s4:#F07894;
    color-scheme:dark;
  }
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--f-body);font-size:17px;line-height:1.6}
img{max-width:100%;display:block}
a{color:var(--machine);text-underline-offset:2px}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--machine);outline-offset:3px;border-radius:4px}
h1,h2,h3{font-family:var(--f-display);line-height:1.12;letter-spacing:-.015em;text-wrap:balance;margin:0}
h1{font-size:clamp(2.3rem,5.6vw,4.1rem);font-weight:700}
h2{font-size:clamp(1.6rem,3vw,2.15rem);font-weight:700}
h3{font-size:1.15rem;font-weight:600;letter-spacing:-.005em}
p{margin:0}
.wrap{max-width:var(--wrap);margin:0 auto;padding-inline:var(--gutter)}
.prose{max-width:68ch}
.prose p+p,.prose p+ul,.prose ul+p,.prose h2+p,.prose h3+p{margin-top:1em}
.prose h2{margin-top:2.2em;margin-bottom:.4em}
.prose h3{margin-top:1.8em;margin-bottom:.3em}
.prose ul{padding-left:1.2em;margin:0}
.prose li+li{margin-top:.4em}
.muted{color:var(--muted)}
.small{font-size:.88rem;color:var(--muted)}
.num{font-variant-numeric:tabular-nums}
.skip{position:absolute;left:-999px}
.skip:focus{left:16px;top:12px;z-index:50;background:var(--surface);padding:8px 12px}

/* Top bar */
.topbar{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--paper) 88%,transparent);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--rule)}
.topbar.on-navy{background:color-mix(in srgb,var(--navy) 92%,transparent);border-bottom-color:rgba(255,255,255,.08)}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--f-display);font-weight:700;font-size:1.2rem;color:var(--ink);text-decoration:none;letter-spacing:-.01em}
.brand img{width:28px;height:28px;border-radius:7px}
.on-navy .brand{color:var(--on-navy)}
.nav{display:flex;gap:4px;flex-wrap:wrap}
.nav a{color:var(--muted);text-decoration:none;font-size:.95rem;font-weight:500;padding:8px 12px;border-radius:8px}
.nav a:hover{color:var(--ink);background:var(--machine-soft)}
.nav a[aria-current="page"]{color:var(--ink);background:var(--machine-soft)}
.on-navy .nav a{color:var(--on-navy-muted)}
.on-navy .nav a:hover,.on-navy .nav a[aria-current="page"]{color:#fff;background:rgba(255,255,255,.1)}
@media (max-width:560px){.topbar .wrap{min-height:56px;padding-block:6px}.nav a{padding:6px 9px;font-size:.9rem}}

/* Hero */
.hero{background:var(--navy);color:var(--on-navy);padding-block:clamp(48px,8vw,96px) clamp(48px,7vw,88px);position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(60% 80% at 85% 10%,rgba(134,168,255,.18),transparent 60%);pointer-events:none}
.hero .wrap{position:relative;display:grid;gap:clamp(28px,4vw,44px)}
.hero h1{max-width:16ch;color:#fff}
.hero .lede{font-size:clamp(1.05rem,1.6vw,1.22rem);color:var(--on-navy-muted);max-width:58ch}
.counters{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr));gap:clamp(20px,3vw,40px);align-items:end}
.counter{display:grid;gap:6px;min-width:0}
.counter .label{font-size:.95rem;color:var(--on-navy-muted)}
.counter .value{font-family:var(--f-body);font-weight:600;font-variant-numeric:tabular-nums;font-size:clamp(1.8rem,4.6vw,3.2rem);line-height:1.05;letter-spacing:-.02em;overflow-wrap:anywhere}
.counter.machine .value{color:var(--machine-bright)}
.counter.human .value{color:var(--human-bright)}
.race{display:grid;gap:10px}
.race-track{height:12px;border-radius:6px;background:rgba(242,182,97,.22);position:relative;overflow:hidden}
.race-fill{position:absolute;inset:0 auto 0 0;width:0;background:var(--machine-bright);border-radius:6px;transition:width 1.2s cubic-bezier(.2,.7,.2,1)}
.race-caption{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:.92rem;color:var(--on-navy-muted)}
.race-caption strong{color:#fff;font-weight:600}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;font:600 .98rem/1 var(--f-body);padding:13px 18px;border-radius:9px;text-decoration:none;border:1px solid transparent;cursor:pointer}
.btn-primary{background:#fff;color:var(--navy)}
.btn-primary:hover{background:#E6ECFA}
.btn-ghost{color:#fff;border-color:rgba(255,255,255,.28)}
.btn-ghost:hover{background:rgba(255,255,255,.08)}
.btn-plain{background:var(--surface);color:var(--ink);border-color:var(--rule)}
.btn-plain:hover{border-color:var(--machine)}
.hero .fine{font-size:.85rem;color:var(--on-navy-muted);max-width:70ch}
.hero .fine a{color:var(--machine-bright)}

/* Page header (inner pages) */
.page-head{padding-block:clamp(40px,6vw,72px) clamp(24px,4vw,40px);border-bottom:1px solid var(--rule)}
.page-head .wrap{display:grid;gap:14px}
.page-head p{font-size:1.12rem;color:var(--muted);max-width:60ch}

/* Sections */
.section{padding-block:clamp(48px,7vw,88px)}
.section+.section{border-top:1px solid var(--rule)}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:16px 32px;flex-wrap:wrap;margin-bottom:24px}
.section-head>div:first-child{display:grid;gap:10px;max-width:62ch;min-width:0;flex:1 1 420px}
.section-head p{color:var(--muted)}

/* Findings */
.findings{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,280px),1fr));gap:clamp(24px,3vw,40px)}
.finding{display:grid;gap:10px;align-content:start;padding-top:18px;border-top:3px solid var(--machine);min-width:0}
.finding.human{border-top-color:var(--human)}
.finding.s3{border-top-color:var(--s3)}
.finding p{color:var(--muted);font-size:.98rem}
.finding a{font-size:.92rem;font-weight:500}

/* Charts */
.chart-card{background:var(--surface);border:1px solid var(--rule);border-radius:var(--radius);padding:18px 14px 10px}
.chart{position:relative;height:460px}
@media (max-width:640px){.chart{height:360px}}
.controls{display:flex;gap:6px;flex-wrap:wrap;flex:0 1 auto;max-width:100%}
.section-head>.controls{display:flex;flex-direction:row}
.chip{font:500 .88rem/1 var(--f-body);border:1px solid var(--rule);background:var(--surface);color:var(--ink);padding:9px 13px;border-radius:999px;cursor:pointer}
.chip[aria-pressed="true"]{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.legend{display:flex;flex-wrap:wrap;gap:8px 18px;font-size:.92rem;margin:4px 4px 14px}
.legend label{display:flex;gap:8px;align-items:center;cursor:pointer}
.legend input{accent-color:var(--machine)}
.sw{width:16px;height:3px;border-radius:2px;display:inline-block}
.sw.dash{background:repeating-linear-gradient(90deg,var(--human) 0 4px,transparent 4px 7px)!important}
.notes{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr));gap:24px;margin-top:28px}
.notes>div{display:grid;gap:6px;align-content:start;min-width:0}
.notes p{font-size:.95rem;color:var(--muted)}

/* FAQ */
.faq{display:grid;gap:0;border-top:1px solid var(--rule)}
.faq details{border-bottom:1px solid var(--rule)}
.faq summary{cursor:pointer;list-style:none;padding:20px 40px 20px 0;font-family:var(--f-display);font-weight:600;font-size:1.15rem;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:6px;top:16px;font-size:1.5rem;color:var(--muted);transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{padding:0 0 22px;color:var(--muted);max-width:68ch}

/* Tables */
.table-wrap{overflow-x:auto;background:var(--surface);border:1px solid var(--rule);border-radius:var(--radius)}
table{border-collapse:collapse;width:100%;font-size:.94rem;min-width:640px}
th,td{text-align:left;padding:12px 16px;border-bottom:1px solid var(--rule);vertical-align:top}
th{font-weight:600;font-size:.85rem;color:var(--muted);background:color-mix(in srgb,var(--paper) 60%,var(--surface))}
td.n{font-variant-numeric:tabular-nums;white-space:nowrap;text-align:right}
th.n{text-align:right}
tbody tr:last-child td{border-bottom:0}
.dot{display:inline-block;width:9px;height:9px;border-radius:50%;margin-right:8px;vertical-align:baseline}

/* CTA band */
.cta-band{background:var(--surface);border:1px solid var(--rule);border-radius:var(--radius);padding:clamp(24px,4vw,40px);display:flex;gap:20px 40px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.cta-band>div{display:grid;gap:8px;max-width:56ch;min-width:0}
.cta-band p{color:var(--muted)}

/* Footer */
.site-footer{background:var(--navy);color:var(--on-navy-muted);padding-block:56px 40px;margin-top:0}
.site-footer .wrap{display:grid;gap:40px}
.foot-grid{display:grid;grid-template-columns:1.6fr repeat(3,1fr);gap:32px}
@media (max-width:820px){.foot-grid{grid-template-columns:1fr 1fr}}
@media (max-width:480px){.foot-grid{grid-template-columns:1fr}}
.foot-grid>div{display:grid;gap:10px;align-content:start;min-width:0}
.foot-grid h3{font-family:var(--f-body);font-size:.92rem;font-weight:600;color:#fff;letter-spacing:0}
.foot-grid a{color:var(--on-navy-muted);text-decoration:none;font-size:.95rem}
.foot-grid a:hover{color:#fff;text-decoration:underline}
.site-footer .brand{color:#fff}
.foot-about{font-size:.95rem;max-width:40ch}
.foot-base{border-top:1px solid rgba(255,255,255,.1);padding-top:20px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:.85rem}

@media (prefers-reduced-motion: reduce){*{transition:none!important;animation:none!important}}