:root{
  --bg:#0b0e12;
  --elev:#10151b;
  --card:#141b23;
  --text:#e8edf5;
  --muted:#9fb1c9;
  --brand:#4fa3ff;
  --brand2:#19c5aa;
  --border:#223243;
  --radius:16px;
  --shadow:0 12px 34px rgba(0,0,0,.34);
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background:transparent;
  color:var(--text);
  font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,Helvetica,Arial;
  line-height:1.72;
}
a{color:inherit}
.article-wrap{width:100%;padding:0 16px 22px}
.hero{
  position:relative;
  overflow:hidden;
  border:1px solid var(--border);
  border-radius:24px;
  padding:28px 20px;
  margin:10px 0 14px;
  background:
    radial-gradient(circle at top right, rgba(79,163,255,.22), transparent 34%),
    radial-gradient(circle at bottom left, rgba(25,197,170,.18), transparent 32%),
    linear-gradient(180deg, rgba(20,27,35,.98), rgba(10,14,18,.98));
  box-shadow:var(--shadow);
}
.eyebrow{font-size:.82rem;font-weight:800;letter-spacing:.16em;color:var(--brand2);text-transform:uppercase;margin-bottom:10px}
.page-title{margin:0;font-size:clamp(2rem,4vw,3rem);line-height:1.05;font-weight:900}
.page-subtitle{max-width:900px;color:#d4deea;margin:.7rem 0 0;font-size:1.04rem}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.chip{display:inline-flex;align-items:center;padding:.4rem .72rem;border-radius:999px;background:rgba(16,21,27,.86);border:1px solid var(--border);font-weight:700}
.article-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px}
.lead{font-size:1.08rem;color:#dce5f1;margin-top:0}
.article-card h2{font-size:1.48rem;margin:1.6rem 0 .7rem;line-height:1.2}
.article-card h3{font-size:1.02rem;margin:0 0 .45rem;color:#fff}
.article-card p{margin:.55rem 0}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px;margin:.85rem 0}
.card{background:linear-gradient(180deg, rgba(16,21,27,.96), rgba(11,14,18,.96));border:1px solid var(--border);border-radius:14px;padding:14px}
.card p:last-child,.card ul:last-child{margin-bottom:0}
ul,ol{padding-left:1.2rem}
li+li{margin-top:.28rem}
.highlight,.note,.closing,.formula{
  border:1px solid var(--border);
  border-radius:14px;
  padding:12px 14px;
  margin:.95rem 0;
}
.highlight{background:linear-gradient(90deg, rgba(79,163,255,.12), rgba(25,197,170,.08));font-weight:700}
.note{background:rgba(25,197,170,.08);border-left:4px solid var(--brand2)}
.closing{background:rgba(79,163,255,.1);font-weight:800}
.formula{background:rgba(16,21,27,.9);font-family:ui-monospace,SFMono-Regular,Consolas,monospace;color:#f0f5fb;text-align:center;font-weight:800;letter-spacing:.05em}
.toc{margin:1rem 0;border:1px solid var(--border);border-radius:14px;background:var(--elev);padding:12px 14px}
.toc summary{cursor:pointer;font-weight:800}
.table-wrap{overflow:auto}
table{width:100%;border-collapse:collapse;border:1px solid var(--border);border-radius:14px;overflow:hidden;margin-top:.8rem}
th,td{padding:12px;border-bottom:1px solid var(--border);text-align:left;vertical-align:top}
thead th{background:color-mix(in oklab,var(--brand) 18%, transparent)}
html{scrollbar-color:color-mix(in oklab,var(--brand)70%,var(--brand2)) var(--elev);scrollbar-width:thin}
*::-webkit-scrollbar{width:10px;height:10px}
*::-webkit-scrollbar-track{background:var(--elev);border-left:1px solid var(--border)}
*::-webkit-scrollbar-thumb{background:linear-gradient(180deg,var(--brand),var(--brand2));border-radius:10px;border:2px solid var(--elev)}
@media (max-width:760px){
  .article-wrap{padding:0 12px 18px}
  .hero{padding:22px 16px;border-radius:20px}
  .article-card{padding:16px}
  .article-card h2{font-size:1.28rem}
}