:root{
  --bg:#0f1724;
  --card:#0b1220;
  --muted:#95a0b0;
  --accent:#2dd4bf;
  --text:#e6eef6;
  --glass: rgba(255,255,255,0.03);
  --radius:12px;
  --container:1100px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  line-height:1.5;
  font-size:16px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background: linear-gradient(180deg,#020617 0%, #07102a 100%);
  color:var(--text);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

/* layout */
.container{max-width:var(--container);margin:0 auto;padding:28px}
.header-inner, .hero-inner{display:flex;gap:24px;align-items:center;justify-content:space-between}
.site-header{position:sticky;top:0;background:linear-gradient(180deg, rgba(2,6,23,0.8), rgba(2,6,23,0.6));backdrop-filter: blur(6px);z-index:40}
.header-inner{padding:14px 28px}
.brand h1{margin:0;font-size:20px;letter-spacing:0.2px}
.tag{margin:4px 0 0;color:var(--muted);font-size:13px}
#nav-toggle{display:none;background:none;border:1px solid rgba(255,255,255,0.06);color:var(--text);padding:8px;border-radius:8px}
.nav a{color:var(--muted);margin-left:18px;text-decoration:none;font-size:15px}
.nav a.btn{background:var(--accent);color:#042024;padding:8px 12px;border-radius:10px;margin-left:18px;text-decoration:none}
.hero{padding:48px 0}
.hero-inner{align-items:flex-start}
.hero h2{font-size:34px;margin:0 0 8px}
.lead{color:var(--muted);max-width:60ch}
.quick-info{background:var(--glass);padding:18px;border-radius:12px;border:1px solid rgba(255,255,255,0.03);min-width:240px}

/* sections */
.section{padding:28px 0}
h2{margin-top:0;color:var(--accent)}
.card{background:rgba(255,255,255,0.02);padding:16px;border-radius:10px;margin:12px 0;border:1px solid rgba(255,255,255,0.03)}
.muted{color:var(--muted);font-size:14px}
.project{margin:12px 0;padding:12px;background:linear-gradient(180deg, rgba(255,255,255,0.01), rgba(255,255,255,0.02));border-radius:8px}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chips span{background:rgba(255,255,255,0.03);padding:8px 10px;border-radius:999px;font-size:14px;color:var(--muted);border:1px solid rgba(255,255,255,0.02)}

/* contact */
.contact a{color:var(--accent);text-decoration:none}

/* footer */
.site-footer{padding:18px 0;border-top:1px solid rgba(255,255,255,0.02);color:var(--muted);font-size:14px;text-align:center}

/* responsive */
@media (max-width:900px){
  .header-inner, .hero-inner{flex-direction:column;align-items:stretch}
  .quick-info{order:2;margin-top:12px}
  #nav-toggle{display:inline-block}
  .nav{display:none;flex-direction:column;padding:12px;background:rgba(3,6,12,0.7);border-radius:8px;margin-top:8px}
  .nav a{margin:8px 0}
}

/* accessibility focus */
a:focus, button:focus {outline:3px solid rgba(45,212,191,0.18);outline-offset:3px}

@media (min-width:901px) {
  .nav {
    display: block !important;
    flex-direction: row;
    background: none;
    padding: 0;
    border-radius: 0;
    margin-top: 0;
  }
}