/* ==========================================================================
   AI Augmented Reading — CANDIDATE DIRECTION: Scientific publisher
   Same markup contracts as site.css. Swap the stylesheet link to preview.
   ========================================================================== */

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

:root{
    --paper:#F5F7FA; --paper-2:#EBEFF4; --paper-3:#DFE5EC;
  --ink:#16191D; --ink-2:#3D444E; --ink-3:#5A626E; --ink-4:#8A929E;
  --accent:#0B5CD5; --accent-deep:#084099; --accent-soft:#E8F0FC; --accent-line:#C3D4F2;
  --rule:#E3E6EA; --rule-strong:#16191D;

  --sans:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --serif:'Source Serif 4',Georgia,serif;
  --mono:'DM Mono',ui-monospace,monospace;

  --wide:1120px; --measure:660px; --pad:2.5rem; --r:3px;
}

html{font-size:16px;scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{background:var(--paper);color:var(--ink);font-family:var(--sans);
  font-size:1rem;line-height:1.65;min-height:100vh;-webkit-font-smoothing:antialiased}
body::before{content:'';display:block;height:4px;background:var(--accent)}

.skip{position:absolute;left:-9999px;top:0;z-index:200;background:var(--accent);color:#fff;
  padding:.75rem 1.25rem;font-size:.72rem;letter-spacing:.12em;text-transform:uppercase}
.skip:focus{left:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}

/* --- Masthead ------------------------------------------------------------ */
nav{position:sticky;top:0;z-index:100;background:var(--paper);
  border-bottom:1px solid var(--rule);display:flex;align-items:center;
  justify-content:space-between;gap:2rem;height:60px;padding:0 var(--pad)}
nav a.brand{font-size:.95rem;font-weight:700;letter-spacing:-.022em;color:var(--ink);
  text-decoration:none;white-space:nowrap}
.nav-links{display:flex;gap:1.5rem;list-style:none}
.nav-links a{font-size:.83rem;font-weight:400;color:var(--ink-3);text-decoration:none;
  padding:.2rem 0;border-bottom:2px solid transparent;transition:color .15s,border-color .15s}
.nav-links a:hover{color:var(--ink)}
.nav-links a[aria-current=page]{color:var(--accent);border-bottom-color:var(--accent);font-weight:500}
.nav-demo{font-size:.8rem;font-weight:500;background:var(--accent);color:#fff;
  padding:.45rem 1rem;border-radius:var(--r);text-decoration:none;white-space:nowrap;transition:background .15s}
.nav-demo:hover{background:var(--accent-deep)}
@media(max-width:900px){.nav-links{display:none}}

/* --- Layout -------------------------------------------------------------- */
.wrap,.section{max-width:var(--wide);margin:0 auto;padding:4.5rem var(--pad)}
.section--tight{padding:2.75rem var(--pad)}
.section--alt{background:var(--paper-2);max-width:none;border-block:1px solid var(--rule)}
.section--alt > *{max-width:var(--wide);margin-left:auto;margin-right:auto}
.rule{max-width:var(--wide);margin:0 auto;padding:0 var(--pad)}
.rule hr{border:none;border-top:1px solid var(--rule)}
.split{display:grid;grid-template-columns:160px 1fr;gap:3rem;align-items:start}
@media(max-width:820px){.split{grid-template-columns:1fr;gap:1rem}}

.hero{max-width:var(--wide);margin:0 auto;padding:5.5rem var(--pad) 4rem;
  border-bottom:1px solid var(--rule)}

/* --- Hero with figure ------------------------------------------------------ */
.hero-split{display:grid;grid-template-columns:1fr 460px;gap:3.5rem;align-items:center}
.hero-figure{width:100%;height:auto;display:block}
.hero-figure-cap{font-size:.78rem;line-height:1.5;color:var(--ink-3);margin-top:.7rem;max-width:none}
@media(max-width:980px){
  .hero-split{grid-template-columns:1fr;gap:2.25rem}
  .hero-figure{max-width:520px}
}

/* --- Alternating section tone --------------------------------------------- */
.section--tint{background:var(--paper-2);max-width:none;border-block:1px solid var(--rule)}
.section--tint > *{max-width:var(--wide);margin-left:auto;margin-right:auto}

/* --- Type ---------------------------------------------------------------- */
h1{font-size:clamp(2.4rem,5.4vw,3.9rem);font-weight:600;line-height:1.1;
  letter-spacing:-.027em;max-width:17ch;margin-bottom:1.4rem}
h2{font-size:clamp(1.55rem,3vw,2.1rem);font-weight:600;line-height:1.2;
  letter-spacing:-.022em;max-width:23ch;margin-bottom:1rem}
h3{font-size:1rem;font-weight:600;letter-spacing:-.01em;margin-bottom:.35rem}

.eyebrow{display:block;font-size:.72rem;font-weight:600;letter-spacing:.1em;
  text-transform:uppercase;color:var(--accent);margin-bottom:1.1rem}
.section-label{font-size:.72rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;
  color:var(--ink-3);margin-bottom:1rem}
.section-num{font-family:var(--mono);font-size:.75rem;color:var(--accent);display:block;margin-bottom:.35rem}

.lead{font-size:1.16rem;font-weight:400;line-height:1.6;color:var(--ink-2);
  max-width:48ch;margin-bottom:2rem}
p{margin-bottom:1.05rem;max-width:var(--measure);color:var(--ink-2)}
.prose{font-size:1.02rem;line-height:1.75;color:var(--ink-2)}
.prose em{font-style:italic;color:var(--ink)}
.prose strong{color:var(--ink);font-weight:600}
a{color:var(--accent);text-decoration:none;border-bottom:1px solid var(--accent-line)}
a:hover{border-bottom-color:var(--accent)}

blockquote{font-family:var(--serif);font-size:1.3rem;line-height:1.5;color:var(--ink);
  max-width:34ch;border-left:3px solid var(--accent);padding:.25rem 0 .25rem 1.5rem;margin:2.25rem 0}
blockquote cite{display:block;font-family:var(--sans);font-size:.78rem;font-style:normal;
  color:var(--ink-3);margin-top:.9rem}

/* --- Buttons ------------------------------------------------------------- */
.cta-row{display:flex;gap:.65rem;flex-wrap:wrap;align-items:center}
.btn{display:inline-flex;align-items:center;gap:.5rem;font-size:.86rem;font-weight:500;
  text-decoration:none;border:1px solid transparent;border-radius:var(--r);padding:.65rem 1.3rem;
  transition:background .16s,border-color .16s,color .16s}
.btn--primary{background:var(--accent);color:#fff}
.btn--primary:hover{background:var(--accent-deep);color:#fff}
.btn--secondary{color:var(--accent);border-color:var(--accent-line);background:var(--paper)}
.btn--secondary:hover{background:var(--accent-soft);border-color:var(--accent)}

/* --- Cards --------------------------------------------------------------- */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(215px,1fr));gap:.75rem;
  border:none;margin-top:2.25rem}
.grid > *{background:var(--paper);border:1px solid var(--rule);border-radius:var(--r);
  padding:1.2rem 1.3rem 1.35rem;transition:border-color .16s,box-shadow .16s}
.grid > *:hover{border-color:var(--accent-line);box-shadow:0 0 0 3px var(--accent-soft)}
.section--alt .grid > *{background:var(--paper)}
.grid-name{font-size:.94rem;font-weight:600;color:var(--ink);margin-bottom:.3rem}
.grid-desc{font-size:.83rem;line-height:1.5;color:var(--ink-3)}
.grid-flag{display:inline-block;font-size:.7rem;font-weight:600;letter-spacing:.02em;
  color:var(--accent-deep);background:var(--accent-soft);border:1px solid var(--accent-line);
  border-radius:100px;padding:.13rem .6rem;margin-top:.65rem}

/* --- Example strip -------------------------------------------------------- */
.examples{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:.9rem;margin:2rem 0 0}
.examples figure{margin:0;background:var(--paper);border:1px solid var(--rule);
  border-radius:var(--r);overflow:hidden}
.examples img{width:100%;height:auto;display:block;border-bottom:1px solid var(--rule)}
.examples figcaption{padding:.85rem 1rem 1rem}
.examples .ex-kind{font-size:.72rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;
  color:var(--accent);margin-bottom:.3rem}
.examples .ex-text{font-size:.83rem;line-height:1.5;color:var(--ink-3);margin:0;max-width:none}
.examples-note{font-size:.83rem;line-height:1.6;color:var(--ink-3);margin-top:1rem;max-width:var(--measure)}

/* --- About: portrait beside the name --------------------------------------- */
.bio{display:grid;grid-template-columns:140px 1fr;gap:1.75rem;align-items:start}
.bio-portrait{width:140px;height:140px;border-radius:var(--r);object-fit:cover;
  display:block;border:1px solid var(--rule);background:var(--paper-2)}
.bio h1{margin-bottom:1rem}
.bio .lead{margin-bottom:0}
@media(max-width:600px){
  .bio{grid-template-columns:96px 1fr;gap:1.1rem}
  .bio-portrait{width:96px;height:96px}
}

/* --- Tables -------------------------------------------------------------- */
table{width:100%;border-collapse:separate;border-spacing:0;margin:1.75rem 0;font-size:.94rem;
  border:1px solid var(--rule);border-radius:var(--r);overflow:hidden}
th,td{text-align:left;padding:.8rem 1.05rem;border-bottom:1px solid var(--rule);
  vertical-align:top;color:var(--ink-2)}
tr:last-child td{border-bottom:none}
th{font-size:.72rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;
  color:var(--ink-3);background:var(--paper-2)}
td:first-child{color:var(--ink);font-weight:600;width:34%}

/* --- Callout ------------------------------------------------------------- */
.callout{background:var(--accent-soft);border:1px solid var(--accent-line);
  border-radius:var(--r);padding:1.35rem 1.6rem;margin:1.75rem 0;max-width:var(--measure)}
.callout p:last-child{margin-bottom:0;color:var(--ink-2)}

/* --- Band ---------------------------------------------------------------- */
.band{background:var(--ink);color:#fff;padding:3.5rem var(--pad)}
.band-inner{max-width:var(--wide);margin:0 auto}
.band h2{color:#fff}
.band p{color:rgba(255,255,255,.7)}
.band a{color:#fff;border-bottom-color:rgba(255,255,255,.4)}
.band-label{font-size:.72rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;
  color:#7FB0F5;margin-bottom:1rem}
.band-value{font-family:var(--mono);font-size:.85rem;color:rgba(255,255,255,.82);line-height:2}
.band .btn--primary{background:#fff;color:var(--ink)}
.band .btn--primary:hover{background:var(--accent);color:#fff}
.band .btn--secondary{color:#fff;border-color:rgba(255,255,255,.35);background:transparent}
.band .btn--secondary:hover{background:#fff;color:var(--ink)}

/* --- Stats --------------------------------------------------------------- */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:.75rem;
  border:none;margin-top:2.25rem}
.stat{background:var(--paper-2);border:1px solid var(--rule);border-radius:var(--r);padding:1.25rem 1.3rem}
.stat-num{font-size:2rem;font-weight:600;letter-spacing:-.03em;line-height:1;color:var(--accent)}
.stat-label{font-size:.81rem;line-height:1.5;color:var(--ink-3);margin-top:.5rem;max-width:none}

/* --- Status pill --------------------------------------------------------- */
.pill{display:inline-block;font-size:.75rem;font-weight:600;color:var(--accent-deep);
  background:var(--accent-soft);border:1px solid var(--accent-line);
  border-radius:100px;padding:.25rem .8rem;margin-bottom:1.1rem}

/* --- Long-form ----------------------------------------------------------- */
.paper{max-width:var(--measure)}
.paper p{font-size:1.04rem;line-height:1.8;color:var(--ink-2);max-width:none;margin-bottom:1.3rem}
.paper h3{font-size:1.12rem;font-weight:600;color:var(--ink);margin:2.5rem 0 .85rem}
.paper h3:first-child{margin-top:0}
.abstract{background:var(--paper-2);border:1px solid var(--rule);border-left:3px solid var(--accent);
  border-radius:0 var(--r) var(--r) 0;padding:1.6rem 1.85rem;margin:1.75rem 0;max-width:var(--measure)}
.abstract p{font-size:.97rem;line-height:1.75;margin-bottom:0;max-width:none}
.abstract .abstract-label{font-size:.72rem;font-weight:600;letter-spacing:.08em;
  text-transform:uppercase;color:var(--accent);margin-bottom:.6rem}
.keywords{font-family:var(--mono);font-size:.78rem;color:var(--ink-3);margin-top:1.25rem;max-width:var(--measure)}
.props{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:.75rem;margin:1.75rem 0}
.props > div{background:var(--paper);border:1px solid var(--rule);border-radius:var(--r);padding:1.15rem 1.3rem}
.props p{font-size:.88rem;line-height:1.6;color:var(--ink-3);margin-bottom:0;max-width:none}
.refs p{font-size:.88rem;line-height:1.65;color:var(--ink-3);margin-bottom:.85rem;
  padding-left:1.6rem;text-indent:-1.6rem;max-width:var(--measure)}

/* --- Scaffold markers ---------------------------------------------------- */
.todo{background:var(--accent-soft);border:1px dashed var(--accent-line);border-radius:var(--r);
  padding:1.1rem 1.35rem;margin:1.4rem 0;font-family:var(--mono);font-size:.74rem;
  line-height:1.85;color:var(--ink-2);max-width:none}
.todo::before{content:'SCAFFOLD — CONTENT PENDING';display:block;font-size:.6rem;
  letter-spacing:.18em;color:var(--accent);margin-bottom:.5rem}
.todo ul{margin:.4rem 0 0 1.1rem}

/* --- Footer -------------------------------------------------------------- */
footer{background:var(--paper-2);border-top:1px solid var(--rule);padding:3rem var(--pad) 2.5rem}
.footer-inner{max-width:var(--wide);margin:0 auto}
.footer-links{display:flex;gap:1.5rem;flex-wrap:wrap;list-style:none;margin-bottom:2rem}
.footer-links a{font-size:.83rem;color:var(--ink-3);text-decoration:none;border:none}
.footer-links a:hover{color:var(--accent)}
.footer-meta{font-size:.83rem;line-height:2;color:var(--ink-3);
  border-top:1px solid var(--rule);padding-top:1.5rem}
.footer-meta a{color:inherit;border:none}
.footer-ip{font-family:var(--mono);font-size:.77rem;color:var(--ink-2)}

@media(max-width:600px){
  :root{--pad:1.25rem}
  .hero{padding-top:3.5rem;padding-bottom:3rem}
  .section{padding-top:3rem;padding-bottom:3rem}
}