:root{
  --bg:#f8fafc;
  --card:#ffffff;
  --accent:#0ea5a3;
  --muted:#64748b;
  --text:#0f172a;
  --radius:12px;
  --container:1100px;
  --gap:1.25rem;
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  line-height:1.5;
  font-size:16px;
}

.container{max-width:var(--container);margin:0 auto;padding:1rem;}

/* Header */
.site-header{background:transparent;position:sticky;top:0;z-index:40;padding:.75rem 0}
.nav{display:flex;align-items:center;justify-content:space-between;gap:1rem}
.logo{font-weight:700;text-decoration:none;color:var(--text);letter-spacing:.2px}
.logo .byline{font-weight:400;color:var(--muted);font-size:.9rem;margin-left:.5rem}

/* Nav */
.nav-toggle{display:none;background:transparent;border:0;font-size:1.25rem;cursor:pointer}
.nav-links{display:flex;gap:1rem;align-items:center}
.nav-links a{text-decoration:none;color:var(--muted);padding:.5rem;border-radius:8px}
.nav-links a:hover{color:var(--text);background:rgba(2,6,23,0.03)}

/* Hero */
.hero{padding:4rem 0;text-align:center;background:linear-gradient(180deg, rgba(14,165,163,0.06), transparent);border-bottom:1px solid rgba(2,6,23,0.04)}
.hero h1{font-size:clamp(1.6rem,3.6vw,2.6rem);margin:0 0 .5rem}
.lead{color:var(--muted);margin:0 0 1rem}
.kicker{font-size:.9rem;color:var(--muted);margin-bottom:1.25rem}
.cta{display:inline-block;padding:.75rem 1rem;background:var(--accent);color:#fff;border-radius:10px;text-decoration:none;font-weight:600;box-shadow:0 6px 18px rgba(14,165,163,0.12);}

/* About */
.about{padding:3rem 0;border-bottom:1px solid rgba(2,6,23,0.04)}
.about h2{margin-top:0}
.skills{list-style:none;padding:0;margin:.5rem 0 0;display:flex;gap:.75rem;flex-wrap:wrap}
.skills li{background:linear-gradient(180deg, rgba(2,6,23,0.03), rgba(2,6,23,0.02));padding:.5rem .75rem;border-radius:999px;font-size:.95rem;color:var(--muted)}

/* Projects */
.projects{padding:3rem 0}
.projects h2{margin-top:0}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:var(--gap);margin-top:1rem}
.card{background:var(--card);border-radius:var(--radius);padding:1rem;box-shadow:0 6px 18px rgba(2,6,23,0.04);display:flex;flex-direction:column;gap:.75rem}
.thumb{height:120px;border-radius:8px;overflow:hidden;display:flex;align-items:center;justify-content:center}
.card h3{margin:.25rem 0 0}
.card-desc{color:var(--muted);margin:0}
.card-meta{font-size:.85rem;color:var(--muted)}
.card-actions{display:flex;gap:.5rem;margin-top:.5rem}
.btn{display:inline-block;padding:.5rem .75rem;border-radius:8px;background:transparent;border:1px solid rgba(2,6,23,0.06);text-decoration:none;color:var(--text);font-weight:600}
.btn:hover{background:rgba(2,6,23,0.03)}
.link{color:var(--accent);text-decoration:none;align-self:center;font-size:.95rem}

/* Contact */
.contact{padding:3rem 0;border-top:1px solid rgba(2,6,23,0.04);margin-bottom:2rem}
.contact form{display:grid;gap:.75rem;max-width:640px}
.contact label{display:block;font-weight:600;color:var(--muted);font-size:.95rem}
.contact input,.contact textarea{padding:.6rem .75rem;border-radius:8px;border:1px solid rgba(2,6,23,0.06);width:100%;font-size:1rem}
.small{color:var(--muted);font-size:.9rem}

/* Footer */
.site-footer{padding:2rem 0;border-top:1px solid rgba(2,6,23,0.04)}
.site-footer small{color:var(--muted)}

/* Reveal animations */
.reveal{opacity:0;transform:translateY(18px);transition:all .6s cubic-bezier(.2,.9,.2,1);will-change:opacity,transform}
.reveal.in-view{opacity:1;transform:none}

/* Keyframes */
@keyframes pulse {
  0%{transform:scale(1);box-shadow:0 6px 18px rgba(14,165,163,0.06)}
  50%{transform:scale(1.02);box-shadow:0 8px 20px rgba(14,165,163,0.09)}
  100%{transform:scale(1);box-shadow:0 6px 18px rgba(14,165,163,0.06)}
}

/* Responsive */
@media (max-width:800px){
  .nav-toggle{display:block}
  .nav-links{position:fixed;top:64px;right:0;background:var(--bg);flex-direction:column;padding:1rem;border-radius:8px;box-shadow:0 6px 18px rgba(2,6,23,0.08);display:none}
  .nav-links.open{display:flex}
  .container{padding:1rem}
}