:root{--ink:#0f172a;--muted:#64748b;--brand:#4f46e5;--brand-2:#7c3aed;--bg:#fff;--soft:#f8fafc;--line:#e2e8f0;--accent:#eef2ff}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;line-height:1.7;color:var(--ink);background:var(--bg)}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
header.nav-bar{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.85);backdrop-filter:saturate(180%) blur(12px);-webkit-backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line);padding:0;display:block}
.nav-inner{max-width:1280px;margin:0 auto;padding:14px 24px;display:flex;align-items:center;justify-content:space-between;gap:24px;position:relative}
.nav-brand{display:flex;align-items:center;gap:8px;color:var(--ink);font-weight:700;letter-spacing:-.01em;text-decoration:none}
.nav-brand:hover{text-decoration:none}
.nav-brand-icon{width:32px;height:32px;background:transparent;border-radius:0;display:flex;align-items:center;justify-content:center;color:#fff}
.nav-brand-icon svg{width:32px;height:32px}
.nav-brand-text{font-size:20px}
.nav-center{display:flex;align-items:center;gap:32px;font-size:14px;font-weight:500}
.nav-center a{color:var(--muted);text-decoration:none}
.nav-center a:hover{color:var(--brand);text-decoration:none}
.nav-center a.nav-active{color:var(--brand)}
.nav-actions{display:flex;align-items:center;gap:16px}
.nav-login{font-size:14px;font-weight:500;color:var(--muted);text-decoration:none}
.nav-login:hover{color:var(--brand)}
.nav-cta{display:inline-block;background:var(--brand);color:#fff;padding:9px 20px;border-radius:999px;font-size:14px;font-weight:600;text-decoration:none;box-shadow:0 8px 20px -8px rgba(79,70,229,.6)}
.nav-cta:hover{background:#4338ca;color:#fff;text-decoration:none}
article{max-width:1024px;margin:0 auto;padding:48px 24px 40px}
.crumbs{font-size:13px;color:var(--muted);margin-bottom:24px}
.crumbs a{color:var(--muted)}
.tag{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--brand);background:var(--accent);padding:5px 12px;border-radius:999px;margin-bottom:16px}
h1{font-size:clamp(30px,4.2vw,46px);letter-spacing:-.025em;margin:0 0 18px;line-height:1.1}
.lede{font-size:19px;color:#334155;margin:0 0 18px}
.byline{display:flex;gap:14px;align-items:center;color:var(--muted);font-size:14px;margin-bottom:36px;padding-bottom:24px;border-bottom:1px solid var(--line)}
.avatar{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px}
h2{font-size:26px;letter-spacing:-.02em;margin:48px 0 12px;line-height:1.2}
h3{font-size:19px;letter-spacing:-.01em;margin:32px 0 8px}
p,li{font-size:17px;color:#1e293b}
ul,ol{padding-left:22px}
li{margin-bottom:10px}
blockquote{border-left:3px solid var(--brand);padding:6px 0 6px 18px;color:#334155;font-style:italic;margin:24px 0}
.callout{background:var(--accent);border-radius:14px;padding:22px 24px;margin:28px 0;border:1px solid #e0e7ff}
.callout h4{margin:0 0 6px;font-size:15px;color:var(--brand);text-transform:uppercase;letter-spacing:.1em}
.callout p{margin:0;color:#334155;font-size:16px}
table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15.5px}
th,td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--line)}
th{background:var(--soft);font-weight:600;color:var(--ink)}
td:first-child{color:var(--ink);font-weight:600}
code{background:#f1f5f9;padding:1px 6px;border-radius:4px;font-size:.92em;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.end-cta{margin:56px 0 0;padding:36px;background:linear-gradient(135deg,#0f172a 0%,#312e81 100%);border-radius:20px;color:#fff;text-align:center}
.end-cta h3{color:#fff;margin:0 0 8px;font-size:24px}
.end-cta p{color:#cbd5e1;margin:0 0 20px;font-size:16px}
.end-cta a{display:inline-block;background:#fff;color:var(--ink);padding:12px 28px;border-radius:999px;font-weight:700}
.end-cta a:hover{text-decoration:none;background:#e2e8f0}
.related{margin:60px 0 0;padding-top:32px;border-top:1px solid var(--line)}
.related h4{font-size:14px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.14em;margin:0 0 16px}
.related-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.related-grid a{display:block;padding:18px;border:1px solid var(--line);border-radius:14px;color:var(--ink)}
.related-grid a:hover{border-color:#c7d2fe;text-decoration:none;background:var(--soft)}
.related-grid .tag{margin:0 0 6px;font-size:11px}
.related-grid div{font-weight:600;font-size:15px;line-height:1.35}
footer{max-width:1024px;margin:0 auto;padding:32px 24px;color:var(--muted);font-size:14px;border-top:1px solid var(--line);display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px}
footer a{color:var(--muted)}
@media (max-width:720px){.related-grid{grid-template-columns:1fr}article{padding:32px 20px 24px}}
.sources{font-size:14px;color:var(--muted);margin:32px 0;padding:18px 22px;background:var(--soft);border-radius:12px;border:1px solid var(--line)}
.sources h4{font-size:11px;text-transform:uppercase;letter-spacing:.14em;color:var(--muted);margin:0 0 8px;font-weight:700}
.sources ul{margin:0;padding-left:20px}
.sources li{font-size:14px;margin-bottom:4px;color:var(--muted)}
.sources a{color:var(--brand);word-break:break-word}

/* unified nav: language dropdown + mobile menu (added for full-header parity) */
.nav-lang{position:relative}
.nav-lang-trigger{display:flex;align-items:center;gap:6px;background:none;border:0;padding:0;font-size:14px;font-weight:500;color:var(--muted);cursor:pointer;transition:color .15s;font-family:inherit}
.nav-lang-trigger:hover{color:var(--brand)}
.nav-lang-icon svg{width:16px;height:16px;display:block}
.nav-lang-menu{position:absolute;right:0;top:calc(100% + 8px);min-width:170px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:6px;box-shadow:0 14px 40px -10px rgba(15,23,42,.18);z-index:60;display:flex;flex-direction:column}
.nav-lang-menu[hidden]{display:none}
.nav-lang-menu a{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:8px 12px;font-size:14px;color:#334155;text-decoration:none;border-radius:8px;transition:background .12s}
.nav-lang-menu a:hover{background:var(--soft);text-decoration:none}
.nav-lang-current{color:var(--brand)!important;font-weight:600}
.nav-lang-check{color:var(--brand);display:inline-flex}
.nav-toggle{display:none;background:none;border:0;padding:6px;cursor:pointer;color:var(--ink);align-items:center;justify-content:center}
.nav-toggle svg{width:24px;height:24px;display:block}
.nav-mobile{display:none}
@media (max-width:880px){
  .nav-center,.nav-actions{display:none}
  .nav-toggle{display:inline-flex}
  .nav-mobile:not([hidden]){display:flex;flex-direction:column;gap:12px;position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:20px 24px 24px;box-shadow:0 14px 40px -10px rgba(15,23,42,.15)}
  .nav-mobile a{font-size:17px;font-weight:500;color:var(--ink);text-decoration:none;padding:4px 0}
  .nav-mobile a.nav-active{color:var(--brand)}
  .nav-mobile hr{border:0;border-top:1px solid var(--line);margin:6px 0}
  .nav-mobile-langs{display:flex;flex-wrap:wrap;gap:6px}
  .nav-mobile-langs a{font-size:12px;font-weight:600;color:var(--muted);background:var(--soft);padding:6px 12px;border-radius:999px}
  .nav-mobile-langs a.nav-active{background:var(--brand);color:#fff}
  .nav-mobile .nav-cta-mobile{align-self:stretch;text-align:center;padding:12px 20px;border-radius:14px;margin-top:6px}
}