.root, :root {
  --bg: #f7fafc;
  --card: #ffffff;
  --muted: #5b646f;
  --accent: #0066cc;
  --surface: #ffffff;
  --glass: rgba(2,6,23,0.03);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial; background: linear-gradient(180deg,#fbfdff 0%,#f1f5f9 100%); color:#0b1220; margin:0;}
.container{max-width:1000px;margin:0 auto;padding:48px 20px}
.site-header{backdrop-filter:blur(6px);position:sticky;top:0;background:linear-gradient(180deg, rgba(255,255,255,0.8), rgba(255,255,255,0.6));}
.nav{display:flex;justify-content:space-between;align-items:center;padding:14px 20px}
.brand{font-weight:700;color:var(--accent);text-decoration:none}
.nav-actions{display:flex;align-items:center;gap:12px}
.theme-toggle{background:transparent;border:1px solid rgba(0,0,0,0.06);padding:6px 8px;border-radius:8px;cursor:pointer}
.nav-links{list-style:none;display:flex;gap:18px;margin:0;padding:0}
.nav-links a{color:var(--muted);text-decoration:none}
.nav-links a:hover{color:var(--accent);}
.hero{padding:80px 0;text-align:center}
.hero h1{font-size:2.4rem;margin:0 0 8px;letter-spacing:-0.02em;}
.lead{color:var(--muted);max-width:720px;margin:0 auto 18px;line-height:1.8;font-size:1.05rem;}
.cta{display:inline-block;background:var(--accent);color:#fff;padding:12px 20px;border-radius:8px;text-decoration:none}
.professional{padding:40px 0;}
.profile-grid{display:grid;grid-template-columns:1.2fr 320px;gap:32px;align-items:center;}
.profile-copy h2{margin-top:0;font-size:2rem}
.profile-details{list-style:none;padding:0;margin:22px 0 0 0;display:grid;gap:10px}
.profile-details li{position:relative;padding-left:24px;color:var(--muted)}
.profile-details li::before{content:'•';position:absolute;left:0;top:0;color:var(--accent);font-weight:700}
.profile-links{display:flex;flex-wrap:wrap;gap:14px;margin-top:24px}
.profile-links a{color:var(--accent);text-decoration:none;border:1px solid rgba(0,102,204,0.15);padding:10px 16px;border-radius:10px;background:#ffffff;transition:transform .18s ease,background .18s ease}
.profile-links a:hover{transform:translateY(-1px);background:rgba(0,102,204,0.05)}
.profile-portrait{border-radius:22px;overflow:hidden;background:var(--card);}
.profile-portrait img{width:100%;border-radius:0;box-shadow:0 16px 40px rgba(15,23,42,0.12);object-fit:cover;display:block;}
.projects .grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}
.card{background:var(--card);padding:18px;border-radius:12px;box-shadow:0 6px 20px rgba(12,18,28,0.06);transition:transform .16s ease,box-shadow .16s ease;}
.card:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(12,18,28,0.12);}
.card img{width:100%;height:140px;object-fit:cover;border-radius:8px;margin-bottom:10px}
.card h3{margin-top:0;font-size:1.25rem;}
.tech-tags{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0 0}
.tech-tag{display:inline-flex;align-items:center;padding:6px 12px;border-radius:999px;background:rgba(0,102,204,0.08);color:var(--accent);font-size:0.9rem;font-weight:500}
.link{color:var(--accent);text-decoration:none;display:inline-flex;align-items:center;padding:10px 14px;border:1px solid rgba(0,102,204,0.15);border-radius:999px;transition:background .18s ease,transform .18s ease;}
.link:hover{background:rgba(0,102,204,0.08);transform:translateY(-1px);}
.blog .blog-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}
.blog-card{background:linear-gradient(180deg, rgba(2,6,23,0.02), rgba(2,6,23,0.01));padding:16px;border-radius:12px}
.meta{color:var(--muted);font-size:0.9rem}
.read{color:var(--accent);text-decoration:none}
.site-footer{padding:28px;text-align:center;color:var(--muted)}
.post-detail img{max-width:100%;border-radius:8px;margin:12px 0}
.content{line-height:1.65;color:#0b1220}

/* Dark theme override (applies when body has .theme-dark) */
body.theme-dark{
  --bg:#0f1720; --card:#0b1220; --muted:#9AA3B2; --accent:#00a8ff; --surface:#071427; --glass: rgba(255,255,255,0.03);
  background: linear-gradient(180deg,#071025 0%,#071827 100%);
  color: #ecf0f3;
}

@media (max-width:900px){
  .profile-grid{grid-template-columns:1fr;}
}

@media (max-width:600px){
  .hero h1{font-size:1.6rem}
  .profile-links{flex-direction:column;align-items:start;}
}