:root{
  --bg:#0b0f1a; --bg2:#0e1322; --text:#e6e7eb; --muted:#93a3b5;
  --accent:#8b5cf6; --accent2:#22d3ee; --card:rgba(255,255,255,.06); --border:rgba(255,255,255,.12);
  --shadow: 0 10px 30px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%;font-family:Inter,system-ui,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:var(--text);
background: radial-gradient(1200px 800px at 85% -10%, rgba(34,211,238,.15) 0%, transparent 60%),
            radial-gradient(1000px 600px at 10% 10%, rgba(139,92,246,.18) 0%, transparent 55%),
            linear-gradient(180deg,var(--bg),var(--bg2));}
a{color:var(--accent2);text-decoration:none} a:hover{text-decoration:underline}
.container{max-width:1200px;margin:0 auto;padding:24px}
.nav{display:flex;align-items:center;justify-content:space-between;padding:10px 0}
.nav .brand{display:flex;align-items:center;gap:12px}
.logo{width:36px;height:36px}
.brand-title{font-weight:800;letter-spacing:.2px}
.nav .links a{color:var(--muted);margin-left:18px}
.btn{background:linear-gradient(90deg,var(--accent),var(--accent2));color:#0b0f1a;border:none;padding:14px 18px;border-radius:14px;font-weight:800;cursor:pointer;box-shadow:var(--shadow)}
.btn.secondary{background:transparent;color:var(--text);border:1px solid var(--border)}
.hero{display:grid;grid-template-columns:1.2fr .8fr;gap:22px;align-items:center;padding:40px 0 10px}
@media (max-width: 920px){ .hero{grid-template-columns:1fr} }
.h1{font-size:48px;line-height:1.05;margin:0 0 12px}
.h2{color:var(--muted);font-size:18px;max-width:680px;margin-bottom:18px}
.hero-img img{width:100%;border-radius:20px;border:1px solid var(--border);box-shadow:var(--shadow)}
.badge{display:inline-block;background:rgba(255,255,255,.08);border:1px solid var(--border);padding:6px 10px;border-radius:999px;color:#cbd5e1;font-size:12px}
.section{margin:48px 0}
.grid{display:grid;gap:16px;grid-template-columns:repeat(3,1fr)}
@media (max-width: 920px){ .grid{grid-template-columns:1fr} }
.card{background:var(--card);border:1px solid var(--border);border-radius:18px;padding:18px}
.card h3{margin-top:0}
footer{margin-top:40px;color:var(--muted);font-size:14px;padding:30px 0;border-top:1px solid var(--border)}
.center{text-align:center}
/* Chat panel larger */
.chat-panel{background:rgba(255,255,255,.07);border:1px solid var(--border);border-radius:22px;padding:20px;box-shadow:var(--shadow)}
.chat-panel .title{font-weight:800;margin:0 0 6px}
.chat-panel .hint{color:var(--muted);margin:0 0 12px}
/* blog */
.post{max-width:900px;margin:20px auto;padding:0 20px}
.post h1{margin-top:10px}
.meta{color:#cbd5e1;font-size:13px;margin-bottom:16px}
figure{margin:16px 0}
figure img{max-width:100%;border-radius:16px;border:1px solid var(--border)}
small.pill{background:rgba(255,255,255,.1);border:1px solid var(--border);padding:4px 10px;border-radius:999px}
/* language switch */
.lang{display:flex;gap:10px;align-items:center}
.lang a{color:#cbd5e1;font-size:14px}
.strip{background:linear-gradient(90deg, rgba(139,92,246,.25), rgba(34,211,238,.25));border:1px solid var(--border);border-radius:18px;padding:18px}