:root{
  --bg:#0a0e14;
  --bg-2:#0f1520;
  --panel:#121a26;
  --panel-2:#172131;
  --line:#1f2c40;
  --text:#e6edf6;
  --muted:#8a99b3;
  --dim:#5b6a85;
  --accent:#22d3ee;
  --accent-2:#7c3aed;
  --accent-3:#34d399;
  --warn:#fbbf24;
  --danger:#fb7185;
  --radius:14px;
  --radius-sm:8px;
  --maxw:1180px;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html,body{margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  min-height:100vh;
}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.skip{position:absolute;left:-9999px;top:0;padding:.5rem 1rem;background:var(--accent);color:#000;z-index:1000}
.skip:focus{left:1rem;top:1rem}

/* background */
.bg-grid{
  position:fixed;inset:0;z-index:-2;
  background-image:
    linear-gradient(rgba(34,211,238,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(34,211,238,.04) 1px,transparent 1px);
  background-size:42px 42px;
  mask-image:radial-gradient(ellipse at top,rgba(0,0,0,.9),transparent 70%);
}
.bg-glow{
  position:fixed;inset:auto -10vw -30vh -10vw;height:80vh;z-index:-1;
  background:radial-gradient(60% 60% at 30% 30%,rgba(124,58,237,.18),transparent 70%),
             radial-gradient(50% 50% at 80% 40%,rgba(34,211,238,.18),transparent 70%);
  pointer-events:none;
  filter:blur(40px);
}

/* nav */
.nav{
  position:sticky;top:0;z-index:50;
  backdrop-filter:saturate(160%) blur(12px);
  -webkit-backdrop-filter:saturate(160%) blur(12px);
  background:rgba(10,14,20,.65);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  max-width:var(--maxw);margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;
  padding:.85rem 1.25rem;
}
.brand{display:flex;align-items:center;gap:.55rem;color:var(--text);font-weight:600;letter-spacing:.2px}
.brand:hover{text-decoration:none}
.brand-mark{color:var(--accent);font-size:1.2rem;text-shadow:0 0 14px rgba(34,211,238,.7)}
.brand-name{font-family:var(--mono);font-size:.95rem}
.nav-links{display:flex;gap:1.1rem;align-items:center;flex-wrap:wrap}
.nav-links a{color:var(--muted);font-size:.92rem;font-family:var(--mono)}
.nav-links a:hover{color:var(--text);text-decoration:none}
.nav-cta{
  color:var(--accent) !important;border:1px solid rgba(34,211,238,.3);
  padding:.35rem .75rem;border-radius:999px;font-size:.85rem !important;
  transition:all .15s ease;
}
.nav-cta:hover{background:rgba(34,211,238,.1);border-color:var(--accent)}

/* hero */
.hero{padding:5rem 1.25rem 3rem;max-width:var(--maxw);margin:0 auto}
.hero-inner{display:grid;grid-template-columns:1.4fr .9fr;gap:3rem;align-items:center}
.eyebrow{
  font-family:var(--mono);font-size:.82rem;color:var(--accent);
  letter-spacing:.12em;text-transform:uppercase;margin:0 0 1rem;
}
.hero h1{
  font-size:clamp(2.2rem,5vw,3.6rem);
  line-height:1.05;margin:0 0 1.25rem;font-weight:700;letter-spacing:-.02em;
}
.grad{
  background:linear-gradient(120deg,var(--accent) 0%,var(--accent-2) 60%,var(--accent-3) 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.lede{font-size:1.1rem;color:var(--muted);max-width:38rem;margin:0 0 1.75rem}
.cta-row{display:flex;gap:.75rem;flex-wrap:wrap;margin-bottom:2.25rem}
.btn{
  display:inline-flex;align-items:center;gap:.45rem;
  padding:.65rem 1.1rem;border-radius:999px;font-weight:500;font-size:.95rem;
  border:1px solid transparent;transition:transform .12s ease,background .15s ease,border-color .15s ease;
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:var(--accent);color:#001218;box-shadow:0 6px 30px -10px rgba(34,211,238,.6)}
.btn-primary:hover{background:#67e8f9}
.btn-ghost{border-color:var(--line);color:var(--text);background:transparent;font-family:var(--mono);font-size:.88rem}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}

.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1rem;margin:0;padding:0}
.stats > div{
  padding:.85rem 1rem;border:1px solid var(--line);
  border-radius:var(--radius-sm);background:rgba(18,26,38,.5);
}
.stats dt{font-family:var(--mono);font-size:.72rem;color:var(--dim);text-transform:uppercase;letter-spacing:.08em;margin-bottom:.25rem}
.stats dd{margin:0;font-size:1.5rem;font-weight:600;color:var(--text)}

.hero-avatar{position:relative;justify-self:center}
.hero-avatar img{
  border-radius:50%;
  box-shadow:0 30px 80px -20px rgba(34,211,238,.45),0 0 0 4px var(--bg);
  position:relative;z-index:2;
}
.ring{
  position:absolute;inset:-22px;border-radius:50%;
  background:conic-gradient(from 0deg,var(--accent),var(--accent-2),var(--accent-3),var(--accent));
  filter:blur(2px);opacity:.55;animation:spin 14s linear infinite;z-index:1;
}
@keyframes spin{to{transform:rotate(360deg)}}

/* sections */
.section{max-width:var(--maxw);margin:0 auto;padding:4rem 1.25rem}
.section-title{
  font-family:var(--mono);color:var(--accent);
  font-size:.95rem;font-weight:500;margin:0 0 .25rem;letter-spacing:.05em;
}
.section-sub{color:var(--muted);margin:.25rem 0 2rem}

/* about */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:2.5rem;align-items:start}
.about-text{color:var(--muted);font-size:1.05rem;margin:0 0 1rem}
.about-text strong{color:var(--text);font-weight:600}
.meta-list{list-style:none;margin:0;padding:0;grid-column:1/-1;display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:.85rem;margin-top:1rem}
.meta-list li{
  padding:.85rem 1rem;border:1px solid var(--line);border-radius:var(--radius-sm);
  background:rgba(18,26,38,.5);font-size:.95rem;color:var(--text);
}
.meta-list span{display:block;font-family:var(--mono);font-size:.7rem;color:var(--dim);text-transform:uppercase;letter-spacing:.08em;margin-bottom:.3rem}

/* featured */
.featured-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:1.1rem}
.card{
  display:flex;flex-direction:column;
  padding:1.25rem;border:1px solid var(--line);
  background:linear-gradient(180deg,var(--panel),var(--panel-2));
  border-radius:var(--radius);
  transition:transform .15s ease,border-color .15s ease,box-shadow .15s ease;
  position:relative;overflow:hidden;
}
.card::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(120deg,transparent 40%,rgba(34,211,238,.06),transparent 80%);
  opacity:0;transition:opacity .2s ease;
}
.card:hover{transform:translateY(-3px);border-color:rgba(34,211,238,.4);box-shadow:0 20px 50px -25px rgba(34,211,238,.4)}
.card:hover::before{opacity:1}
.card-head{display:flex;justify-content:space-between;align-items:baseline;gap:.5rem;margin-bottom:.4rem}
.card h3{margin:0;font-size:1.05rem;font-family:var(--mono);font-weight:600}
.card h3 a{color:var(--text)}
.card h3 a:hover{color:var(--accent);text-decoration:none}
.card-stars{font-size:.85rem;color:var(--warn);font-family:var(--mono);white-space:nowrap}
.card-desc{color:var(--muted);font-size:.92rem;margin:.25rem 0 .85rem;flex:1;line-height:1.5}
.card-foot{display:flex;justify-content:space-between;align-items:center;gap:.5rem;font-size:.8rem;font-family:var(--mono);color:var(--dim)}
.lang-dot{display:inline-block;width:.65rem;height:.65rem;border-radius:50%;margin-right:.35rem;vertical-align:middle;background:var(--dim)}
.card-link{color:var(--accent)}

/* stack */
.lang-bar{display:flex;height:10px;border-radius:5px;overflow:hidden;background:var(--panel);margin-bottom:1rem;border:1px solid var(--line)}
.lang-bar span{display:block;height:100%;transition:opacity .15s ease}
.lang-bar span:hover{opacity:.8}
.lang-legend{display:flex;flex-wrap:wrap;gap:.5rem .9rem;font-size:.85rem;font-family:var(--mono);color:var(--muted)}
.lang-legend span{display:inline-flex;align-items:center;gap:.4rem}
.lang-legend i{display:inline-block;width:.7rem;height:.7rem;border-radius:2px}

/* projects */
.filters{display:grid;grid-template-columns:2fr 1fr 1fr;gap:.7rem;margin-bottom:1.5rem}
.filters input,.filters select{
  background:var(--panel);color:var(--text);border:1px solid var(--line);
  border-radius:var(--radius-sm);padding:.65rem .85rem;font:inherit;font-size:.95rem;
  transition:border-color .15s ease;
}
.filters input:focus,.filters select:focus{outline:none;border-color:var(--accent)}
.filters input::placeholder{color:var(--dim)}
.projects-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:.85rem}
.empty{text-align:center;color:var(--muted);padding:3rem 1rem;font-family:var(--mono)}

/* footer */
.footer{border-top:1px solid var(--line);margin-top:4rem;padding:2.5rem 1.25rem;color:var(--muted);font-size:.9rem}
.footer-inner{max-width:var(--maxw);margin:0 auto;display:flex;justify-content:space-between;flex-wrap:wrap;gap:1rem}
.footer-meta{font-family:var(--mono);color:var(--dim)}

/* responsive */
@media (max-width:780px){
  .hero{padding-top:3rem}
  .hero-inner{grid-template-columns:1fr;gap:2rem;text-align:left}
  .hero-avatar{order:-1;justify-self:start}
  .hero-avatar img{width:140px;height:140px}
  .ring{inset:-14px}
  .stats{grid-template-columns:repeat(2,1fr)}
  .about-grid{grid-template-columns:1fr;gap:1rem}
  .filters{grid-template-columns:1fr}
  .nav-links{gap:.7rem}
  .nav-links a:not(.nav-cta){display:none}
}
@media (max-width:480px){
  .stats dd{font-size:1.2rem}
  .hero h1{font-size:2rem}
}