:root{--bg:#0a0f1e;--fg:#e6ecff;--muted:#9aa8c7;--accent:#6ea8ff;--accent2:#6ef0ff;--card:#0f1526;--border:#1b2338;--shadow:0 8px 24px rgba(0,0,0,.35)}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,Noto Sans,Arial}
#bg{position:fixed;inset:0;z-index:0;background:#000}
.site-header{position:fixed;top:0;left:0;right:0;height:72px;display:flex;align-items:center;justify-content:space-between;padding:0 24px;z-index:2;backdrop-filter:saturate(140%) blur(8px)}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--fg)}
.logo{filter:drop-shadow(0 4px 16px rgba(109,233,255,.25))}
.nav{display:flex;gap:16px}
.nav-link{color:var(--muted);text-decoration:none;padding:8px 12px;border-radius:10px;transition:transform .3s ease,background .3s ease,color .3s ease}
.nav-link:hover{transform:translateY(-2px);background:rgba(255,255,255,.05);color:var(--fg)}
.hero{position:relative;z-index:1;min-height:72vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:120px 24px 64px}
.title{margin:0;font-size:48px;letter-spacing:.02em;background:linear-gradient(90deg,var(--accent),var(--accent2));-webkit-background-clip:text;background-clip:text;color:transparent;animation:fadeUp .8s ease both}
.subtitle{margin:12px 0 24px;color:var(--muted);font-size:18px;animation:fadeUp .8s ease .15s both}
.cta{display:flex;gap:12px;animation:fadeUp .8s ease .3s both}
.btn{display:inline-flex;align-items:center;justify-content:center;height:44px;padding:0 18px;border-radius:12px;text-decoration:none;font-weight:600;transition:transform .25s ease,box-shadow .25s ease,background .25s ease}
.btn.primary{background:linear-gradient(90deg,var(--accent),var(--accent2));color:#00111a;box-shadow:var(--shadow)}
.btn.primary:hover{transform:translateY(-2px)}
.btn.ghost{background:rgba(255,255,255,.06);color:var(--fg);border:1px solid var(--border)}
.btn.ghost:hover{transform:translateY(-2px);background:rgba(255,255,255,.12)}
.projects{position:relative;z-index:1;padding:32px 24px 64px;max-width:1160px;margin:0 auto}
.projects h2,.about h2{margin:0 0 12px}
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.card{background:radial-gradient(1200px 600px at 10% 10%,rgba(110,240,255,.16),transparent 40%),radial-gradient(800px 400px at 90% 20%,rgba(110,168,255,.14),transparent 35%),var(--card);border:1px solid var(--border);border-radius:16px;padding:18px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:10px;transform:translateZ(0);transition:transform .25s ease,border-color .25s ease}
.card:hover{transform:translateY(-4px);border-color:#2a375a}
.card-title{font-size:18px;margin:0;color:var(--fg)}
.card-desc{font-size:14px;color:var(--muted);margin:0}
.card-actions{display:flex;gap:8px;margin-top:auto}
.about{position:relative;z-index:1;max-width:900px;margin:0 auto;padding:24px;color:var(--muted)}
.footer{position:relative;z-index:1;text-align:center;padding:24px;color:var(--muted)}
@keyframes fadeUp{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
@media (max-width:900px){.title{font-size:36px}.grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.title{font-size:30px}.site-header{height:64px}.logo{width:120px;height:36px}.grid{grid-template-columns:1fr}}