:root{
  --bg:#0b1220;
  --card:#101a33;
  --text:#e8eefc;
  --muted:#b8c3e6;
  --accent:#4ea1ff;
  --accent2:#7c5cff;
  --border:rgba(255,255,255,.12);
  --warn:#ffcc66;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:linear-gradient(180deg,var(--bg),#070b14);color:var(--text);line-height:1.55}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1100px;margin:0 auto;padding:24px}
header{position:sticky;top:0;background:rgba(11,18,32,.75);backdrop-filter: blur(10px);border-bottom:1px solid var(--border);z-index:10}
.navbar{display:flex;gap:14px;align-items:center;justify-content:space-between;padding:14px 24px}
.brand{display:flex;gap:10px;align-items:center}
.logo{width:30px;height:30px;border-radius:8px;background:linear-gradient(135deg,var(--accent),var(--accent2))}
.brand h1{font-size:16px;margin:0;font-weight:700;letter-spacing:.2px}
.brand small{display:block;color:var(--muted);font-size:12px;font-weight:500}
nav{display:flex;flex-wrap:wrap;gap:10px;justify-content:flex-end}
nav a{padding:7px 10px;border:1px solid transparent;border-radius:10px;color:var(--text);font-size:13px}
nav a.active, nav a:hover{border-color:var(--border);background:rgba(255,255,255,.04);text-decoration:none}
.hero{padding:22px 0 10px}
.hero h2{font-size:30px;margin:0 0 8px}
.hero p{color:var(--muted);margin:0;max-width:900px}
.grid{display:grid;grid-template-columns:repeat(12,1fr);gap:14px;margin-top:18px}
.card{grid-column:span 12;background:rgba(16,26,51,.75);border:1px solid var(--border);border-radius:16px;padding:16px}
.card h3{margin:0 0 8px;font-size:16px}
.card p, .card li{color:var(--muted);margin:0}
.badge{display:inline-flex;align-items:center;gap:8px;padding:6px 10px;border:1px solid var(--border);border-radius:999px;font-size:12px;color:var(--muted);background:rgba(255,255,255,.03)}
.badge strong{color:var(--text);font-weight:700}
.cols-6{grid-column:span 12}
.cols-4{grid-column:span 12}
.cols-8{grid-column:span 12}
@media(min-width:920px){
  .cols-6{grid-column:span 6}
  .cols-4{grid-column:span 4}
  .cols-8{grid-column:span 8}
}
.kv{display:grid;grid-template-columns:1fr;gap:10px;margin:10px 0 0}
.kv div{padding:10px;border:1px solid var(--border);border-radius:14px;background:rgba(255,255,255,.02)}
.kv b{display:block;color:var(--text);font-size:13px;margin-bottom:4px}
hr{border:none;border-top:1px solid var(--border);margin:16px 0}
.table{width:100%;border-collapse:separate;border-spacing:0 8px}
.table th{font-size:12px;color:var(--muted);text-align:left;padding:8px 10px}
.table td{background:rgba(255,255,255,.03);border:1px solid var(--border);padding:10px;border-left:none;border-right:none;vertical-align:top}
.table tr td:first-child{border-left:1px solid var(--border);border-top-left-radius:12px;border-bottom-left-radius:12px}
.table tr td:last-child{border-right:1px solid var(--border);border-top-right-radius:12px;border-bottom-right-radius:12px}
.note{border-left:3px solid var(--warn);padding:10px 12px;background:rgba(255,204,102,.08);border-radius:12px;color:var(--muted)}
.footer{padding:26px 0;color:var(--muted);font-size:12px}
.refs ol{padding-left:18px}
.refs li{margin:8px 0;color:var(--muted)}
.toc a{display:block;padding:6px 0}
sup{font-size:10px;color:var(--muted)}


/* Mobile header height fix */
@media (max-width: 768px) {
  header, nav {
    padding-top: 6px !important;
    padding-bottom: 6px !important;
    min-height: unset !important;
  }
  header h1, nav h1 {
    font-size: 1.1rem !important;
    margin: 4px 0 !important;
  }
  nav a {
    padding: 6px 8px !important;
    font-size: 0.9rem !important;
  }
}


/* Mobile hamburger menu */
@media (max-width: 768px) {
  nav ul {
    display: none;
    flex-direction: column;
    margin: 0;
    padding: 0;
  }
  nav ul.show {
    display: flex;
  }
  .hamburger {
    display: block;
    font-size: 1.6rem;
    cursor: pointer;
    padding: 6px 10px;
  }
}

/* Desktop */
.hamburger {
  display: none;
}


/* Mobile hamburger menu (robust for nav links as <a> elements) */
@media (max-width: 768px) {
  nav .nav-links { display: none !important; flex-direction: column; gap: 6px; }
  nav .nav-links.show { display: flex !important; }
  nav .hamburger { display: inline-block !important; font-size: 1.6rem; cursor: pointer; padding: 6px 10px; }
}
nav .hamburger { display: none; }