:root{
  --bg:#f6f7fb;--bg-card:#fff;--text:#1e2433;--muted:#6b7280;
  --accent:#3a5f8a;--accent-h:#2a4a6e;--border:#e3e6ee;
  --hero-overlay:linear-gradient(180deg,rgba(10,18,48,.15),rgba(10,18,48,.55));
  --shadow:0 8px 24px rgba(20,30,60,.08);
  --radius:14px;
}
@media (prefers-color-scheme:dark){
  :root{
    --bg:#0b1020;--bg-card:#141a2e;--text:#e8ecf5;--muted:#9aa3b5;
    --accent:#6db3ff;--accent-h:#9ad0ff;--border:#243049;
    --hero-overlay:linear-gradient(180deg,rgba(5,8,20,.2),rgba(5,8,20,.7));
    --shadow:0 8px 28px rgba(0,0,0,.35);
  }
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  background:var(--bg);color:var(--text);line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--accent);text-decoration:none}
a:hover{color:var(--accent-h);text-decoration:underline}
.wrap{max-width:820px;margin:0 auto;padding:0 20px}
header{
  display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;
  gap:12px;padding:18px 0;border-bottom:1px solid var(--border);margin-bottom:28px;
}
.logo{
  display:inline-flex;align-items:center;gap:10px;font-weight:650;font-size:1.25rem;
  color:var(--text)!important;text-decoration:none!important;margin:0;
}
.logo img{width:32px;height:32px;border-radius:50%;display:block}
nav{display:flex;gap:4px;flex-wrap:wrap}
nav a{
  color:var(--muted)!important;text-decoration:none!important;padding:6px 12px;border-radius:999px;
  font-size:.95rem;
}
nav a:hover{background:var(--border);color:var(--text)!important}
h1{font-weight:650;font-size:clamp(1.5rem,3.5vw,2rem);line-height:1.25;margin:0 0 .6em}
h2{font-weight:600;font-size:1.2rem;line-height:1.35;margin:0 0 .4em}
.lead{color:var(--muted);font-size:1.05rem;margin:0 0 1.5rem}
.hero{
  position:relative;border-radius:var(--radius);overflow:hidden;margin:0 0 2rem;
  box-shadow:var(--shadow);aspect-ratio:16/9;background:#0a1230;
}
.hero picture,.hero img{display:block;width:100%;height:100%;object-fit:cover}
.hero-caption{
  position:absolute;left:0;right:0;bottom:0;padding:28px 22px 20px;
  background:var(--hero-overlay);color:#fff;
}
.hero-caption h1{color:#fff;margin:0 0 .35em;text-shadow:0 1px 8px rgba(0,0,0,.35)}
.hero-caption p{margin:0;color:rgba(255,255,255,.88);font-size:.98rem;max-width:36em}
.cards{display:grid;gap:1.25rem}
.card{
  display:grid;grid-template-columns:minmax(0,1fr);gap:0;
  background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow);transition:transform .15s ease,box-shadow .15s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(20,30,60,.12)}
@media (min-width:640px){
  .card{grid-template-columns:220px 1fr}
}
.card-cover{display:block;aspect-ratio:16/10;background:#0a1230;overflow:hidden}
.card-cover img{width:100%;height:100%;object-fit:cover;display:block}
.card-body{padding:1rem 1.15rem 1.2rem}
.card-body h2 a{color:var(--text)!important;text-decoration:none!important}
.card-body h2 a:hover{color:var(--accent)!important}
.card-body p{margin:.5rem 0 0;color:var(--muted);font-size:.95rem}
.date{color:var(--muted);font-size:.85rem}
.article-cover{
  border-radius:var(--radius);overflow:hidden;margin:0 0 1.5rem;box-shadow:var(--shadow);
  aspect-ratio:16/9;background:#0a1230;
}
.article-cover img{width:100%;height:100%;object-fit:cover;display:block}
article.note p{margin:0 0 1em}
.back{display:inline-block;margin-top:1.5rem;font-size:.95rem}
footer{
  margin:3rem 0 2rem;padding-top:1rem;border-top:1px solid var(--border);
  color:var(--muted);font-size:.85rem;
}

/* Figures & charts */
figure.chart{
  margin:1.4rem 0 1.6rem;padding:0;background:var(--bg-card);
  border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow);
}
figure.chart img, figure.chart svg, figure.chart object{
  display:block;width:100%;height:auto;background:#0b1020;
}
figure.chart figcaption{
  padding:.7rem 1rem .85rem;font-size:.82rem;color:var(--muted);line-height:1.45;
}
figure.chart figcaption a{color:var(--accent)}
article.note h2{margin:1.6rem 0 .7rem;font-size:1.25rem}
article.note ul{margin:0 0 1em;padding-left:1.2em;color:var(--text)}
article.note li{margin:.35em 0;color:var(--muted)}
article.note li strong{color:var(--text)}
.related{margin:2rem 0 0;padding:1rem 1.1rem;border:1px solid var(--border);
  border-radius:var(--radius);background:var(--bg-card)}
.related h2{margin:0 0 .5rem;font-size:1.05rem}
.related p{margin:0;color:var(--muted);font-size:.92rem}
.sources{margin:1.5rem 0 0;font-size:.82rem;color:var(--muted)}
.sources a{word-break:break-word}