:root{
  --bg:#ffffff;
  --bg-alt:#f5f7fa;
  --ink:#0f172a;
  --ink-soft:#334155;
  --muted:#64748b;
  --brand:#0b5fff;
  --brand-dark:#0742b8;
  --border:#e2e8f0;
  --accent:#0ea5e9;
  --max:1120px;
  --radius:10px;
  --shadow:0 1px 2px rgba(15,23,42,.04),0 8px 24px rgba(15,23,42,.06);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{color:var(--brand-dark);text-decoration:underline}
h1,h2,h3,h4{line-height:1.25;color:var(--ink);margin:0 0 .6em}
h1{font-size:clamp(1.9rem,4vw,2.6rem);letter-spacing:-.01em}
h2{font-size:clamp(1.4rem,2.4vw,1.8rem);margin-top:1.5em}
h3{font-size:1.15rem;margin-top:1.4em}
p{margin:0 0 1em;color:var(--ink-soft)}
.container{max-width:var(--max);margin:0 auto;padding:0 1.25rem}

/* Header */
.site-header{
  border-bottom:1px solid var(--border);
  background:var(--bg);
  position:sticky;top:0;z-index:50;
  backdrop-filter:saturate(180%) blur(8px);
}
.nav{
  display:flex;align-items:center;justify-content:space-between;
  padding:.85rem 0;gap:1rem;
}
.brand{font-weight:700;color:var(--ink);font-size:1.05rem;letter-spacing:-.01em}
.brand:hover{text-decoration:none;color:var(--brand)}
.nav-links{display:flex;flex-wrap:wrap;gap:1.1rem;list-style:none;margin:0;padding:0}
.nav-links a{color:var(--ink-soft);font-size:.94rem;font-weight:500}
.nav-links a:hover{color:var(--brand);text-decoration:none}

/* Hero */
.hero{
  padding:3.5rem 0 2.5rem;
  background:linear-gradient(180deg,#f8fbff 0%,#ffffff 100%);
  border-bottom:1px solid var(--border);
}
.hero .sub{font-size:1.15rem;color:var(--muted);margin-bottom:1.4rem;max-width:62ch}
.hero-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:2.5rem;align-items:center}
.hero-grid img{border-radius:var(--radius);box-shadow:var(--shadow)}
@media(max-width:780px){.hero-grid{grid-template-columns:1fr}}

/* Buttons */
.btn{
  display:inline-block;background:var(--brand);color:#fff;
  padding:.7rem 1.15rem;border-radius:8px;font-weight:600;font-size:.95rem;
  margin-right:.5rem;margin-top:.4rem;
}
.btn:hover{background:var(--brand-dark);color:#fff;text-decoration:none}
.btn.alt{background:#fff;color:var(--brand);border:1px solid var(--brand)}

/* Sections */
section{padding:2.5rem 0}
.section-alt{background:var(--bg-alt);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}

/* Cards */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1.2rem;margin-top:1.5rem}
.card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:1.3rem;box-shadow:var(--shadow);
}
.card h3{margin-top:0;color:var(--ink)}
.card p{margin-bottom:.4rem;font-size:.96rem}
.card a{font-weight:600}

/* Skills grid */
.skills{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:.6rem;margin:1.2rem 0}
.skill{
  background:#fff;border:1px solid var(--border);border-radius:8px;
  padding:.6rem .9rem;font-size:.92rem;color:var(--ink-soft);font-weight:500;
}

/* CTA block */
.cta{
  background:linear-gradient(135deg,#0b5fff 0%,#0ea5e9 100%);
  color:#fff;border-radius:var(--radius);padding:2rem;margin:2rem 0;
  text-align:center;
}
.cta h2{color:#fff;margin-top:0}
.cta p{color:rgba(255,255,255,.92)}
.cta .btn{background:#fff;color:var(--brand)}
.cta .btn:hover{background:#f1f5f9}

/* Breadcrumbs */
.crumbs{font-size:.88rem;color:var(--muted);padding:1rem 0 0}
.crumbs a{color:var(--muted)}
.crumbs span[aria-current]{color:var(--ink-soft)}

/* Blog */
.posts{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.3rem;margin-top:1.5rem}
.post{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:1.3rem;
}
.post time{color:var(--muted);font-size:.85rem}
.post h3{margin:.4rem 0 .5rem;font-size:1.1rem}
.post h3 a{color:var(--ink)}
.post h3 a:hover{color:var(--brand)}

/* FAQ */
.faq{margin-top:1.5rem}
.faq details{
  border:1px solid var(--border);border-radius:8px;background:#fff;
  padding:.85rem 1.1rem;margin-bottom:.6rem;
}
.faq summary{font-weight:600;cursor:pointer;color:var(--ink)}
.faq details[open] summary{color:var(--brand)}
.faq p{margin:.6rem 0 0}

/* Footer */
.site-footer{
  background:#0f172a;color:#cbd5e1;padding:2.5rem 0 1.5rem;margin-top:3rem;
}
.site-footer a{color:#cbd5e1}
.site-footer a:hover{color:#fff;text-decoration:none}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1.5rem;margin-bottom:1.5rem}
.footer-grid h4{color:#fff;font-size:.95rem;margin-bottom:.6rem}
.footer-grid ul{list-style:none;margin:0;padding:0}
.footer-grid li{margin:.3rem 0;font-size:.92rem}
.copyright{border-top:1px solid #1e293b;padding-top:1rem;font-size:.85rem;color:#94a3b8;text-align:center}

/* Lists */
.checks{list-style:none;padding:0;margin:1rem 0}
.checks li{padding:.35rem 0 .35rem 1.7rem;position:relative;color:var(--ink-soft)}
.checks li::before{
  content:"";position:absolute;left:0;top:.7rem;width:8px;height:8px;
  background:var(--brand);border-radius:50%;
}

figure{margin:1.5rem 0}
figure img{border-radius:var(--radius);box-shadow:var(--shadow)}
figcaption{font-size:.88rem;color:var(--muted);margin-top:.5rem;text-align:center}

/* Article content */
article p,article li{color:var(--ink-soft)}
article ul,article ol{padding-left:1.3rem}
article li{margin:.3rem 0}