/* Auto theme via prefers-color-scheme; minimal, readable, responsive */
:root{
  --bg: #ffffff;
  --text: #0b0b0b;
  --muted: #555;
  --accent: #2563eb;
  --surface: #f5f7fb;
  --card: #ffffff;
  --border: #e6e8ee;
  --shadow: 0 2px 12px rgba(0,0,0,0.06);
}

@media (prefers-color-scheme: dark){
  :root{
    --bg: #0b0f17;
    --text: #e6e9f0;
    --muted: #a2a9b8;
    --accent: #60a5fa;
    --surface: #0f1420;
    --card: #111827;
    --border: #1f2937;
    --shadow: 0 6px 24px rgba(0,0,0,0.5);
  }
}

*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,Helvetica,Arial,sans-serif}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}

.container{max-width:1000px;margin:auto;padding:0 1rem}
.site-header{position:sticky;top:0;background:var(--bg);border-bottom:1px solid var(--border);z-index:40}
.nav{display:flex;align-items:center;justify-content:space-between;padding:.8rem 1rem}
.brand{font-weight:800;font-size:1.1rem;letter-spacing:.03em}
.nav-links{list-style:none;display:flex;gap:1rem;margin:0;padding:0}
.nav-links a{padding:.4rem .6rem;border-radius:.5rem}
.nav-links a:hover{background:var(--surface);text-decoration:none}
.nav-toggle{display:none;background:none;border:none;font-size:1.2rem}

.hero{padding:4rem 1rem 3rem}
.hero h1{font-size:clamp(2rem,4vw,3rem);margin:0 0 .5rem}
.lead{color:var(--muted);font-size:1.1rem;margin:0 0 1rem}
.cta-row{display:flex;gap:.75rem;flex-wrap:wrap}
.btn{display:inline-block;padding:.7rem 1rem;border-radius:.7rem;border:1px solid var(--border);background:var(--card);box-shadow:var(--shadow);font-weight:600}
.btn.primary{background:var(--accent);border-color:transparent;color:white}
.btn.ghost{background:transparent}
.btn.sm{padding:.45rem .7rem;font-size:.9rem}

.section{padding:3rem 1rem}
.section h2{font-size:1.8rem;margin:0 0 1rem}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1rem}
.card{background:var(--card);border:1px solid var(--border);border-radius:1rem;padding:1rem;box-shadow:var(--shadow)}
.card h3{margin-top:.2rem;margin-bottom:.3rem}
.meta{color:var(--muted);font-size:.9rem}
.actions{display:flex;gap:.5rem;margin-top:.6rem}

.skills{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem;margin-top:.8rem}
.skills h3{margin:.2rem 0}
.skills ul{margin:.3rem 0 0 1rem}

.contact-list{list-style:none;padding:0;margin:.4rem 0}
.contact-list li{margin:.2rem 0}

.site-footer{border-top:1px solid var(--border);padding:1rem 0;background:var(--bg)}
.accent{color:var(--accent)}

@media (max-width:720px){
  .nav-toggle{display:block}
  .nav-links{display:none;flex-direction:column;gap:.6rem;background:var(--bg);position:absolute;right:1rem;top:3.2rem;border:1px solid var(--border);border-radius:.75rem;padding:.6rem 1rem;box-shadow:var(--shadow)}
  .nav-links.open{display:flex}
}