*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--bg:#03050a;--surface:#0b0e1a;--card:#111627;--border:#1c2541;--text:#c8d0e0;--text-dim:#6874a0;--accent:#00f5d4;--accent2:#7c3aed;--accent3:#f472b6;--glow:rgba(0,245,212,0.15);--radius:16px;--transition:0.3s cubic-bezier(0.4,0,0.2,1)}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
body::before{content:'';position:fixed;inset:0;background:radial-gradient(ellipse at 50% -20%,rgba(124,58,237,0.08),transparent 60%),radial-gradient(ellipse at 20% 80%,rgba(0,245,212,0.04),transparent 50%);pointer-events:none;z-index:0}
.bg-stars{position:fixed;inset:0;overflow:hidden;pointer-events:none;z-index:0}
.bg-stars span{position:absolute;width:2px;height:2px;background:#fff;border-radius:50%;animation:twinkle var(--d,4s) ease-in-out infinite alternate}
@keyframes twinkle{0%{opacity:0.2}100%{opacity:1}}
.wrap{position:relative;z-index:1;max-width:820px;margin:0 auto;padding:0 20px}

/* header */
.header{background:rgba(3,5,10,0.85);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100;padding:14px 0}
.header .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);font-weight:700;font-size:15px;letter-spacing:-0.3px}
.logo .icon{width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent2));display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0}
.logo:hover{color:var(--accent)}
.nav{display:flex;align-items:center;gap:8px}
.nav a{color:var(--text-dim);text-decoration:none;font-size:13px;padding:6px 12px;border-radius:8px;transition:var(--transition)}
.nav a:hover,.nav a.active{color:var(--accent);background:var(--glow)}
.lang-switch{display:flex;gap:4px;margin-left:8px}
.lang-switch a{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:50%;font-size:11px;font-weight:600;text-transform:uppercase;color:var(--text-dim);text-decoration:none;transition:var(--transition);border:1px solid transparent}
.lang-switch a:hover{color:var(--accent);border-color:var(--accent)}
.lang-switch a.active{background:var(--accent);color:#03050a;border-color:var(--accent)}

/* blog listing */
.blog-header{padding:60px 0 40px;text-align:center}
.blog-header h1{font-size:clamp(28px,5vw,48px);font-weight:800;background:linear-gradient(135deg,var(--accent),var(--accent2),var(--accent3));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:12px;line-height:1.2}
.blog-header p{color:var(--text-dim);font-size:clamp(15px,2vw,18px);max-width:600px;margin:0 auto}
.posts{display:grid;gap:20px;padding-bottom:60px}
.post-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:28px;transition:var(--transition);position:relative;overflow:hidden}
.post-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--accent),var(--accent2));opacity:0;transition:var(--transition)}
.post-card:hover::before{opacity:1}
.post-card:hover{transform:translateY(-2px);border-color:rgba(0,245,212,0.2);box-shadow:0 8px 40px rgba(0,0,0,0.3)}
.post-card .meta{display:flex;gap:12px;align-items:center;font-size:12px;color:var(--text-dim);margin-bottom:10px}
.post-card .cat{padding:2px 10px;border-radius:20px;font-size:11px;font-weight:600;background:var(--glow);color:var(--accent)}
.post-card h2{font-size:20px;font-weight:700;margin-bottom:10px;line-height:1.4}
.post-card h2 a{color:var(--text);text-decoration:none;transition:var(--transition)}
.post-card h2 a:hover{color:var(--accent)}
.post-card p{color:var(--text-dim);font-size:14px;line-height:1.7;margin-bottom:16px}
.post-card .read-more{display:inline-flex;align-items:center;gap:6px;color:var(--accent);text-decoration:none;font-size:14px;font-weight:600;transition:var(--transition)}
.post-card .read-more:hover{gap:10px}

/* single post */
.article{padding:40px 0 60px}
.article .breadcrumb{display:flex;gap:8px;align-items:center;font-size:13px;color:var(--text-dim);margin-bottom:24px;flex-wrap:wrap}
.article .breadcrumb a{color:var(--text-dim);text-decoration:none;transition:var(--transition)}
.article .breadcrumb a:hover{color:var(--accent)}
.article .breadcrumb .sep{color:var(--border)}
.article .breadcrumb .current{color:var(--text)}
.article h1{font-size:clamp(24px,4vw,38px);font-weight:800;line-height:1.25;margin-bottom:12px;letter-spacing:-0.5px}
.article .post-meta{display:flex;flex-wrap:wrap;gap:16px;font-size:13px;color:var(--text-dim);margin-bottom:30px;padding-bottom:20px;border-bottom:1px solid var(--border)}
.article .post-meta .tag{padding:2px 10px;border-radius:20px;background:var(--glow);color:var(--accent);font-size:11px;font-weight:600}
.article h2{font-size:22px;font-weight:700;margin:36px 0 14px;color:var(--accent);line-height:1.3}
.article h3{font-size:18px;font-weight:600;margin:24px 0 10px;color:var(--text);line-height:1.3}
.article p{margin-bottom:16px;font-size:15px;color:var(--text)}
.article p strong{color:#fff}
.article ul,.article ol{margin:0 0 16px 24px}
.article li{margin-bottom:8px;font-size:15px;color:var(--text)}
.article a{color:var(--accent);text-decoration:none;border-bottom:1px solid transparent;transition:var(--transition)}
.article a:hover{border-bottom-color:var(--accent)}
.article blockquote{border-left:3px solid var(--accent2);padding:12px 20px;margin:20px 0;background:rgba(124,58,237,0.06);border-radius:0 var(--radius) var(--radius) 0;font-style:italic;color:var(--text-dim)}
.article .toc{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px 24px;margin:24px 0}
.article .toc .toc-title{font-size:14px;font-weight:700;margin-bottom:10px;color:var(--accent)}
.article .toc a{display:block;padding:4px 0;font-size:14px;color:var(--text-dim);border:none}
.article .toc a:hover{color:var(--accent)}
.article .toc .l2{padding-left:20px;font-size:13px}
.article .info-box{background:linear-gradient(135deg,rgba(0,245,212,0.06),rgba(124,58,237,0.06));border:1px solid rgba(0,245,212,0.15);border-radius:var(--radius);padding:20px 24px;margin:24px 0;display:flex;gap:14px;align-items:flex-start}
.article .info-box .icon{font-size:20px;flex-shrink:0;margin-top:2px}
.article .info-box p{margin:0;font-size:14px}
.article .info-box strong{color:var(--accent)}
.article table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14px}
.article th,.article td{padding:10px 14px;text-align:left;border-bottom:1px solid var(--border)}
.article th{background:var(--surface);font-weight:600;color:var(--accent)}
.article img{max-width:100%;border-radius:var(--radius);margin:20px 0}
.article .cta-box{background:linear-gradient(135deg,var(--accent),var(--accent2));border-radius:var(--radius);padding:28px;margin:32px 0;text-align:center;color:#fff}
.article .cta-box h3{color:#fff;margin-top:0;font-size:20px}
.article .cta-box p{color:rgba(255,255,255,0.85);font-size:14px;margin-bottom:16px}
.article .cta-box .btn{display:inline-block;padding:12px 28px;border-radius:12px;background:#fff;color:var(--accent2);font-weight:700;font-size:15px;text-decoration:none;transition:var(--transition)}
.article .cta-box .btn:hover{transform:scale(1.05);box-shadow:0 8px 30px rgba(0,0,0,0.3)}

/* related posts */
.related{padding:40px 0 60px;border-top:1px solid var(--border)}
.related h2{font-size:22px;font-weight:700;margin-bottom:20px}
.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
.related-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;transition:var(--transition)}
.related-card:hover{transform:translateY(-2px);border-color:rgba(0,245,212,0.15)}
.related-card h3{font-size:15px;font-weight:600;margin-bottom:6px}
.related-card h3 a{color:var(--text);text-decoration:none}
.related-card h3 a:hover{color:var(--accent)}
.related-card .excerpt{font-size:13px;color:var(--text-dim);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* footer */
.footer{text-align:center;padding:30px 0;border-top:1px solid var(--border);color:var(--text-dim);font-size:13px}
.footer a{color:var(--accent);text-decoration:none}

/* responsive */
@media(max-width:640px){
  .wrap{padding:0 16px}
  .header{padding:10px 0}
  .nav a{font-size:12px;padding:4px 8px}
  .post-card{padding:20px}
  .post-card h2{font-size:18px}
  .article{padding:20px 0 40px}
  .article .toc{padding:14px 16px}
  .related-grid{grid-template-columns:1fr}
  .article table{font-size:13px}
  .article th,.article td{padding:6px 10px}
}