:root{--bg:#0b1220;--panel:#0f1a2c;--panel2:#0b1220;--ink:#e5e7eb;--muted:#9ca3af;--line:rgba(229,231,235,.14);--accent:#38bdf8;--accent2:#fb7185;--shadow:0 18px 60px rgba(0,0,0,.35)}
*{box-sizing:border-box}
body{margin:0;background:radial-gradient(1000px 700px at 20% 0%, rgba(56,189,248,.20), transparent 55%),radial-gradient(900px 600px at 80% 10%, rgba(251,113,133,.16), transparent 55%),var(--bg);color:var(--ink);font:16px/1.65 system-ui,-apple-system,Segoe UI,Roboto,Arial}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1180px;margin:0 auto;padding:0 18px}
.sr-only{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden}

#site-header{position:sticky;top:0;z-index:20;background:rgba(11,18,32,.75);backdrop-filter:blur(10px) saturate(1.2);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 0}
.brand{display:flex;align-items:center;gap:12px}
#logo img{display:block;height:32px;width:auto;filter:drop-shadow(0 8px 18px rgba(0,0,0,.35))}
.site-title{font-weight:900}
.tagline{color:var(--muted);font-size:13px}
.ad{min-width:180px;max-width:360px}

#split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:0;min-height:calc(100vh - 70px)}
#hero{padding:24px 18px;display:flex;align-items:stretch;background:linear-gradient(180deg,rgba(15,26,44,.92),rgba(15,26,44,.72))}
.hero-inner{max-width:520px;margin-left:auto;margin-right:auto;display:flex;flex-direction:column;gap:12px}
.hero-title{margin:0;font-size:34px;line-height:1.15;letter-spacing:.2px}
.hero-sub{margin:0;color:var(--muted)}
.hero-ad{margin-top:10px;border:1px dashed rgba(229,231,235,.22);border-radius:18px;padding:14px;background:rgba(11,18,32,.55)}

.content{padding:24px 18px;background:rgba(11,18,32,.35)}
.content>*{max-width:740px;margin-left:auto;margin-right:auto}

#rail{position:fixed;right:16px;top:90px;bottom:16px;width:220px;border:1px solid var(--line);border-radius:18px;background:rgba(15,26,44,.78);backdrop-filter:blur(10px);box-shadow:var(--shadow)}
.rail-inner{padding:14px;height:100%;overflow:auto}
.rail-title{font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--muted);margin-bottom:10px}
#rail ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px}
#rail a{display:block;padding:9px 10px;border-radius:12px;color:var(--ink)}
#rail li.active a{background:rgba(56,189,248,.14);font-weight:900}

#footer{padding:18px 0 40px;border-top:1px solid var(--line);background:rgba(11,18,32,.55)}
#footer .social{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:10px}
#footer a[role="button"]{border:1px solid var(--line);border-radius:12px;padding:9px 10px;background:rgba(15,26,44,.75)}
#footer p{margin:0;color:var(--muted)}

@media (max-width: 1100px){
  #rail{display:none}
}
@media (max-width: 880px){
  .ad{display:none}
  #split{grid-template-columns:1fr}
  #hero{min-height:auto}
}