/* European Observatory on AI Standards — eoais.org
   Palette and type are brand-locked: navy ink, paper ground, the mark's own
   colours used only where the mark itself appears. */

:root{
  --navy:#1B2A4A;        /* ink, from the brand pack */
  --navy-soft:#2f3f60;
  --paper:#FBFBF9;       /* warm near-white ground */
  --paper-2:#F3F4F1;     /* panel ground */
  --slate:#5A6472;       /* secondary text */
  --rule:#D9DCE1;        /* hairlines */
  --rule-strong:#B9C0CB;
  --yellow:#FCD700;      /* brand accents — used sparingly, near the mark only */
  --blue:#2058F7;
  --teal:#50B8C7;
  --maxw:44rem;          /* ~72 chars at this serif size */
  --wide:64rem;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--navy);
  font-family:"Source Serif 4",Georgia,"Times New Roman",serif;
  font-size:1.125rem;
  line-height:1.62;
  font-feature-settings:"onum" 1,"pnum" 1;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,nav,.eyebrow,.btn,.brief-index-head,.meta,footer,.card-label{
  font-family:"Inter","Helvetica Neue",Arial,sans-serif;
}

a{color:var(--navy);text-decoration:none;border-bottom:1px solid var(--rule-strong);transition:border-color .15s}
a:hover{border-color:var(--navy)}
a:focus-visible{outline:2px solid var(--blue);outline-offset:2px;border-radius:2px}

.wrap{max-width:var(--wide);margin:0 auto;padding:0 1.5rem}
.col{max-width:var(--maxw)}

/* ---------- top bar ---------- */
.topbar{
  border-bottom:1px solid var(--rule);
  background:rgba(251,251,249,.92);
  backdrop-filter:saturate(1.1) blur(6px);
  position:sticky;top:0;z-index:20;
}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;height:68px}
.brandline{display:flex;align-items:center;gap:.7rem;border:0}
.brandline img{height:34px;width:auto;display:block}
.brandline span{
  font-family:"Inter",sans-serif;font-weight:600;font-size:.82rem;letter-spacing:.01em;
  color:var(--navy);line-height:1.15;max-width:15ch;
}
nav.main{display:flex;gap:1.6rem}
nav.main a{
  border:0;font-size:.86rem;font-weight:500;color:var(--slate);
}
nav.main a:hover{color:var(--navy)}
.nav-toggle{display:none}

/* ---------- hero ---------- */
.hero{padding:5.5rem 0 3.5rem;border-bottom:1px solid var(--rule)}
.hero .wrap{display:grid;grid-template-columns:1fr;gap:2.5rem}
.hero-mark{width:132px;height:132px}
.hero h1{
  font-family:"Source Serif 4",Georgia,serif;
  font-weight:600;font-size:clamp(2.1rem,5vw,3.15rem);line-height:1.08;
  margin:.2rem 0 0;letter-spacing:-.01em;
}
.hero .lede{
  font-size:1.28rem;line-height:1.5;color:var(--navy-soft);max-width:38rem;margin:1.25rem 0 0;
}
.hero .sub{color:var(--slate);font-size:1.02rem;max-width:40rem;margin:1rem 0 0}
.cta-row{display:flex;flex-wrap:wrap;gap:.8rem;margin-top:2rem}
.btn{
  display:inline-block;font-size:.9rem;font-weight:600;letter-spacing:.01em;
  padding:.72rem 1.2rem;border-radius:2px;border:1px solid var(--navy);
}
.btn-primary{background:var(--navy);color:#fff}
.btn-primary:hover{background:#12203c;border-color:#12203c}
.btn-ghost{background:transparent;color:var(--navy)}
.btn-ghost:hover{background:var(--paper-2)}

/* ---------- section rhythm ---------- */
section.band{padding:4rem 0;border-bottom:1px solid var(--rule)}
.eyebrow{
  font-size:.74rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;
  color:var(--slate);margin:0 0 1rem;
}
h2{font-size:1.7rem;font-weight:600;line-height:1.2;margin:.1rem 0 1.1rem;letter-spacing:-.005em}
h3{font-size:1.06rem;font-weight:600;margin:1.6rem 0 .3rem}
p{margin:0 0 1.05rem}
.band p:last-child{margin-bottom:0}
.lead-para{font-size:1.18rem;color:var(--navy-soft);line-height:1.55}

/* ---------- publication / brief index ---------- */
.pub-head{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:1rem}
.pub-head .count{font-family:"Inter",sans-serif;font-size:.8rem;color:var(--slate);font-weight:500}
ol.briefs{list-style:none;counter-reset:b;margin:2rem 0 0;padding:0;max-width:52rem}
ol.briefs li{
  counter-increment:b;display:grid;grid-template-columns:2.6rem 1fr;gap:1rem;
  padding:1.05rem 0;border-top:1px solid var(--rule);
}
ol.briefs li:last-child{border-bottom:1px solid var(--rule)}
ol.briefs li::before{
  content:counter(b,decimal-leading-zero);
  font-family:"Inter",sans-serif;font-variant-numeric:tabular-nums;
  font-size:.9rem;font-weight:600;color:var(--teal);padding-top:.18rem;
}
.brief-t{font-family:"Source Serif 4",serif;font-weight:600;font-size:1.12rem;color:var(--navy)}
.brief-s{font-size:.98rem;color:var(--slate);line-height:1.5;margin-top:.25rem}
.wave-tag{
  font-family:"Inter",sans-serif;font-size:.66rem;font-weight:600;letter-spacing:.08em;
  text-transform:uppercase;color:var(--slate);
  border:1px solid var(--rule-strong);border-radius:2px;padding:.12rem .4rem;margin-left:.5rem;
  vertical-align:.14em;white-space:nowrap;
}

/* ---------- two-column info (about / training) ---------- */
.split{display:grid;grid-template-columns:1fr;gap:2.5rem}
.panel{background:var(--paper-2);border:1px solid var(--rule);border-radius:3px;padding:1.6rem 1.7rem}
.panel h3{margin-top:0}
.panel p{font-size:1rem;color:var(--navy-soft)}
.disclaimer{font-size:.92rem;color:var(--slate);line-height:1.55}

/* ---------- follow ---------- */
.follow-row{display:flex;flex-wrap:wrap;gap:.8rem;margin-top:1.5rem}
.follow-row .btn{border-color:var(--rule-strong)}
.follow-row .btn:hover{border-color:var(--navy);background:var(--paper-2)}

/* ---------- footer ---------- */
footer{background:var(--navy);color:#c9d2e2;padding:3rem 0 2.5rem;font-family:"Inter",sans-serif;font-size:.85rem;line-height:1.6}
footer .wrap{display:grid;grid-template-columns:1fr;gap:1.6rem}
footer img{height:56px;width:auto}
footer a{color:#fff;border-bottom-color:rgba(255,255,255,.35)}
footer a:hover{border-bottom-color:#fff}
footer .fdisc{max-width:46rem;color:#9fb0c9}
footer .legal{color:#7e90ab;font-size:.8rem;border-top:1px solid rgba(255,255,255,.14);padding-top:1.2rem}

/* ---------- responsive ---------- */
@media(min-width:800px){
  .hero .wrap{grid-template-columns:132px 1fr;align-items:start;gap:2.8rem}
  .hero-mark{margin-top:.4rem}
  .split{grid-template-columns:1fr 1fr;gap:2.5rem}
  footer .wrap{grid-template-columns:auto 1fr}
}
@media(max-width:640px){
  body{font-size:1.06rem}
  nav.main{display:none}
  .hero{padding:3.5rem 0 2.5rem}
  ol.briefs li{grid-template-columns:2rem 1fr;gap:.7rem}
}

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