:root{
  --primary:#1e3a8a;
  --primary-hover:#172554;
  --bg:#f8fafc;
  --surface:#ffffff;
  --text:#0f172a;
  --muted:#64748b;
  --border:#e2e8f0;
  --radius:14px;
  --radius-lg:20px;
  --shadow:0 1px 3px rgba(15,23,42,.06), 0 8px 24px rgba(15,23,42,.04);
  --shadow-hover:0 4px 16px rgba(15,23,42,.08), 0 12px 32px rgba(15,23,42,.06);
  --container:1100px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{
  font-family:'Inter',system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:var(--container);margin:0 auto;padding:0 20px}
.section{padding:72px 0}
.section.alt{background:var(--surface);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.section-head{text-align:center;max-width:680px;margin:0 auto 44px}
.section-kicker{
  display:inline-block;font-size:.72rem;font-weight:700;letter-spacing:.14em;
  text-transform:uppercase;color:var(--primary);background:#eef2ff;
  padding:6px 12px;border-radius:999px;margin-bottom:12px;border:1px solid #dbeafe
}
.section-title{font-size:clamp(1.7rem,3.5vw,2.15rem);font-weight:750;line-height:1.2;letter-spacing:-.02em}
.section-desc{color:var(--muted);margin-top:10px;font-size:.98rem}
.section-desc .link{font-weight:600}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:999px;font-weight:600;font-size:.92rem;
  border:1px solid transparent;cursor:pointer;transition:all .18s;
}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-hover)}
.btn-ghost{background:var(--surface);border-color:var(--border);color:var(--text)}
.btn-ghost:hover{border-color:var(--text)}
.link{font-weight:600;color:var(--primary)}
.link:hover{text-decoration:underline}
.navbar{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.9);backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid var(--border);
}
.nav-inner{height:64px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.logo{font-weight:800;font-size:1.35rem;letter-spacing:-.02em}
.logo span{color:var(--primary)}
.nav-menu{display:flex;gap:26px;align-items:center}
.nav-link{font-weight:500;color:var(--muted);position:relative;padding:4px 0;font-size:.93rem}
.nav-link:hover,.nav-link.active{color:var(--text)}
.nav-link.active::after{
  content:"";position:absolute;left:0;right:0;bottom:-6px;height:2px;background:var(--primary);border-radius:2px
}
.nav-actions{display:flex;align-items:center;gap:12px}
.nav-cta{padding:9px 16px;font-size:.88rem}
.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px}
.hamburger span{width:22px;height:2px;background:var(--text);border-radius:2px}
.hero{padding:44px 0 36px;overflow:hidden}
.hero-inner{display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--surface);border:1px solid var(--border);
  padding:6px 12px;border-radius:999px;font-size:.82rem;font-weight:600;color:var(--muted);
  box-shadow:var(--shadow)
}
.hero-text h1{font-size:clamp(2.4rem,5.5vw,3.4rem);font-weight:800;line-height:.95;margin:14px 0 6px;letter-spacing:-.03em}
.hero-text h1 span{color:var(--primary)}
.hero-text h2{font-size:clamp(1.15rem,2.5vw,1.45rem);font-weight:600;color:var(--muted);margin-bottom:14px;letter-spacing:-.01em}
.lead{color:var(--muted);font-size:1rem;max-width:540px}
.hero-cta{display:flex;gap:10px;margin:22px 0 26px;flex-wrap:wrap}
.hero-stats{display:flex;gap:24px;border-top:1px solid var(--border);padding-top:18px;max-width:420px}
.hero-stats div{display:flex;flex-direction:column}
.hero-stats strong{font-size:1.35rem;font-weight:750;line-height:1}
.hero-stats span{font-size:.8rem;color:var(--muted);font-weight:500;letter-spacing:.02em}
.hero-visual{display:flex;justify-content:center}
.avatar-wrap{position:relative;width:min(360px,88vw);aspect-ratio:1}
.avatar{
  width:100%;height:100%;object-fit:cover;border-radius:28px;
  border:4px solid #fff;box-shadow:var(--shadow-hover);position:relative;z-index:1
}
.avatar-ring{
  position:absolute;inset:-8px;border:1px dashed #cbd5e1;border-radius:32px;z-index:0
}
.dot{width:8px;height:8px;background:#16a34a;border-radius:50%;box-shadow:0 0 0 4px rgba(22,163,74,.14)}
.about-grid{display:grid;grid-template-columns:1.35fr .85fr;gap:24px;align-items:start}
.about-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:26px;box-shadow:var(--shadow)
}
.about-card p{color:var(--muted);margin-bottom:10px;font-size:.96rem}
.about-card p:first-of-type{color:var(--text);font-size:1rem}
.about-list{list-style:none;margin-top:14px;display:grid;gap:10px;color:var(--muted);font-size:.93rem}
.about-list li{display:flex;align-items:center;gap:10px}
.li-icon{width:18px;height:18px;flex-shrink:0;color:var(--primary)}
.about-highlights{display:grid;gap:14px}
.highlight{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}
.highlight h3{font-size:.98rem;margin-bottom:4px}
.highlight p{color:var(--muted);font-size:.9rem}
.education-card{
  max-width:760px;margin:0 auto;display:flex;gap:16px;align-items:flex-start;
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:22px;box-shadow:var(--shadow)
}
.edu-icon{width:36px;height:36px;display:grid;place-items:center;background:#eef2ff;border:1px solid #dbeafe;border-radius:10px;flex-shrink:0;color:var(--primary)}
.edu-icon svg{width:18px;height:18px}
.edu-body h3{font-size:1.05rem;margin-bottom:2px;letter-spacing:-.01em}
.edu-meta{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:.82rem;font-weight:600;letter-spacing:.02em;margin-bottom:6px;flex-wrap:wrap}
.edu-year{background:var(--primary);color:#fff;padding:2px 8px;border-radius:999px;font-size:.74rem;letter-spacing:.04em}
.edu-dot{width:3px;height:3px;background:#cbd5e1;border-radius:50%}
.edu-focus{color:var(--primary);font-weight:600;font-size:.88rem;margin-bottom:8px}
.edu-desc{color:var(--muted);font-size:.92rem;line-height:1.6;margin-bottom:10px}
.featured-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;max-width:760px;margin:0 auto}
.featured-card{
  display:flex;gap:14px;align-items:flex-start;
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:20px;box-shadow:var(--shadow);transition:.18s
}
.featured-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:#cbd5e1}
.featured-icon{width:36px;height:36px;display:grid;place-items:center;background:#eef2ff;border:1px solid #dbeafe;border-radius:10px;flex-shrink:0;color:var(--primary)}
.featured-icon svg{width:18px;height:18px}
.featured-card h3{font-size:.98rem;margin-bottom:4px}
.featured-card p{color:var(--muted);font-size:.88rem;margin-bottom:8px;line-height:1.5}
.featured-card .link{font-size:.84rem}
.skills-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.skill-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:20px;box-shadow:var(--shadow);transition:.18s
}
.skill-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.skill-icon{width:40px;height:40px;display:grid;place-items:center;background:#eef2ff;border:1px solid #dbeafe;border-radius:10px;margin-bottom:12px;color:var(--primary)}
.skill-icon svg{width:20px;height:20px}
.skill-card h3{font-size:.98rem;margin-bottom:4px}
.skill-card p{color:var(--muted);font-size:.88rem;margin-bottom:10px;min-height:38px}
.tags{display:flex;flex-wrap:wrap;gap:6px}
.tags span{background:#f1f5f9;border:1px solid var(--border);padding:4px 9px;border-radius:999px;font-size:.74rem;font-weight:600;color:var(--muted)}
.projects-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.project-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow);transition:.18s;display:flex;flex-direction:column
}
.project-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.project-thumb{height:72px;display:flex;align-items:center;justify-content:flex-start;padding:0 18px;gap:10px;font-size:.92rem}
.project-body{padding:16px;display:flex;flex-direction:column;gap:8px;flex:1}
.project-body h3{font-size:.98rem}
.project-body p{color:var(--muted);font-size:.88rem;flex:1}
.project-actions{display:flex;gap:14px;margin-top:4px;font-size:.86rem}
.projects-note{text-align:center;margin-top:18px;color:var(--muted);font-size:.88rem}
.projects-note code{background:#f1f5f9;padding:2px 6px;border-radius:6px;font-size:.84em}
.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.contact-grid.contact-only{grid-template-columns:repeat(4,1fr)}
.contact-item{
  display:flex;gap:12px;align-items:center;
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:14px 16px;box-shadow:var(--shadow)
}
.ci-icon{width:38px;height:38px;display:grid;place-items:center;background:#eef2ff;border:1px solid #dbeafe;border-radius:10px;flex-shrink:0;color:var(--primary)}
.ci-icon svg{width:18px;height:18px}
.contact-item h4{font-size:.9rem;margin-bottom:2px}
.contact-item a,.contact-item span{color:var(--muted);font-size:.86rem;word-break:break-all}
.contact-item a:hover{color:var(--primary)}
.footer{border-top:1px solid var(--border);background:var(--surface);padding:18px 0}
.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:12px;color:var(--muted);font-size:.85rem;flex-wrap:wrap}
.back-to-top{
  width:36px;height:36px;display:grid;place-items:center;
  border:1px solid var(--border);border-radius:10px;background:var(--surface);transition:.15s;color:var(--muted)
}
.back-to-top:hover{background:var(--text);color:#fff;border-color:var(--text)}
.back-to-top svg{width:16px;height:16px}
.reveal{opacity:0;transform:translateY(10px);transition:.5s}
.reveal.in{opacity:1;transform:none}
@media (max-width: 1024px){
  .skills-grid{grid-template-columns:repeat(2,1fr)}
  .projects-grid{grid-template-columns:repeat(2,1fr)}
  .contact-grid.contact-only{grid-template-columns:repeat(2,1fr)}
}
@media (max-width: 860px){
  .nav-menu{
    position:fixed;inset:64px 0 auto 0;background:var(--surface);
    flex-direction:column;gap:0;padding:10px 18px 18px;
    border-bottom:1px solid var(--border);box-shadow:var(--shadow);
    transform:translateY(-120%);opacity:0;pointer-events:none;transition:.22s
  }
  .nav-menu.open{transform:none;opacity:1;pointer-events:auto}
  .nav-menu .nav-link{padding:12px 0;width:100%;border-bottom:1px solid #f1f5f9;font-size:.96rem}
  .nav-menu .nav-link:last-child{border:none}
  .nav-link.active::after{display:none}
  .hamburger{display:flex}
  .hero-inner{grid-template-columns:1fr;gap:26px}
  .hero-visual{order:-1}
  .avatar-wrap{width:min(300px,68vw)}
  .about-grid{grid-template-columns:1fr}
  .education-card{flex-direction:row}
  .featured-grid{grid-template-columns:1fr}
  .skills-grid,.projects-grid{grid-template-columns:1fr}
  .contact-grid,.contact-grid.contact-only{grid-template-columns:1fr}
  .section{padding:52px 0}
}
@media (max-width: 480px){
  .hero-cta .btn{flex:1}
  .hero-stats{gap:16px}
}