[hidden]{display:none!important}
:root{
  --black:#07090f;
  --dark:#0c1120;
  --card:#111827;
  --border:#1e2a40;
  --amber:#d4943a;
  --amber-l:#e8a83e;
  --white:#edeae4;
  --grey:#6b7a99;
  --grey-l:#9baabb;
  --serif:'Playfair Display',serif;
  --sans:'DM Sans',sans-serif;
}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--sans);background:var(--black);color:var(--white);overflow-x:hidden;line-height:1.65;-webkit-font-smoothing:antialiased}

/* NAV */
nav{
  position:fixed;top:0;width:100%;z-index:100;
  display:flex;align-items:center;justify-content:space-between;
  padding:1rem 3.5rem;
  background:rgba(7,9,15,.94);
  backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border);
  transition:padding .3s;
}
nav.scrolled{padding:.7rem 3.5rem}
.nav-name{font-family:var(--serif);font-size:1rem;font-weight:700;color:var(--white);text-decoration:none;letter-spacing:.01em}
.nav-name span{color:var(--amber)}
.nav-links{display:flex;align-items:center;gap:2rem}
.nav-links a{color:var(--grey-l);text-decoration:none;font-size:.78rem;font-weight:500;letter-spacing:.06em;text-transform:uppercase;transition:color .2s}
.nav-links a:hover,.nav-links a.active{color:var(--amber)}
.nav-cta{background:var(--amber);color:var(--black)!important;padding:.45rem 1.1rem;border-radius:2px;font-size:.78rem;font-weight:600;text-decoration:none;letter-spacing:.04em;transition:background .2s}
.nav-cta:hover{background:var(--amber-l)}
.nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;background:none;border:none;padding:4px}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--grey-l);transition:.25s}

/* HERO */
.hero{min-height:100vh;display:flex;align-items:center;padding:0 3.5rem;position:relative;overflow:hidden}
.hero-bg{position:absolute;top:0;right:0;bottom:0;left:0;background:url('https://images.unsplash.com/photo-1451187580459-43490279c0fa?auto=format&fit=crop&w=1920&q=80') center/cover}
.hero-bg::after{content:'';position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(105deg,rgba(7,9,15,.97) 45%,rgba(7,9,15,.6) 100%)}
.hero-inner{position:relative;z-index:2;max-width:760px;padding:8rem 0}
.tag{display:inline-flex;align-items:center;gap:.45rem;border:1px solid rgba(212,148,58,.35);border-radius:2px;padding:.28rem .8rem;margin-bottom:1.5rem;font-size:.7rem;letter-spacing:.18em;text-transform:uppercase;color:var(--amber);font-weight:600}
.tag::before{content:'';width:5px;height:5px;border-radius:50%;background:var(--amber)}
.hero h1{font-family:var(--serif);font-size:clamp(2.4rem,4.5vw,4rem);font-weight:700;line-height:1.1;margin-bottom:1.2rem}
.hero h1 em{font-style:italic;color:var(--amber)}
.hero-sub{color:var(--grey-l);font-size:1rem;line-height:1.8;max-width:600px;margin-bottom:.6rem}
.hero-contact{display:flex;gap:1.5rem;flex-wrap:wrap;margin-bottom:2rem;margin-top:.8rem}
.hero-contact a{display:inline-flex;align-items:center;gap:.4rem;color:var(--grey);font-size:.8rem;text-decoration:none;transition:color .2s}
.hero-contact a:hover{color:var(--amber)}
.hero-contact svg{width:14px;height:14px;flex-shrink:0}
.hero-btns{display:flex;gap:.9rem;flex-wrap:wrap}

/* BUTTONS */
.btn-primary{display:inline-flex;align-items:center;gap:.5rem;background:var(--amber);color:var(--black);padding:.72rem 1.55rem;border-radius:2px;font-weight:600;font-size:.84rem;text-decoration:none;letter-spacing:.03em;transition:background .2s,transform .15s}
.btn-primary:hover{background:var(--amber-l);transform:translateY(-1px)}
.btn-primary svg{width:15px;height:15px;flex-shrink:0}
.btn-ghost{display:inline-flex;align-items:center;gap:.5rem;border:1px solid var(--border);color:var(--grey-l);padding:.72rem 1.55rem;border-radius:2px;font-weight:500;font-size:.84rem;text-decoration:none;transition:border-color .2s,color .2s}
.btn-ghost:hover{border-color:var(--amber);color:var(--amber)}

/* METRICS */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);background:var(--dark);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.metric{padding:2rem 1.8rem;border-right:1px solid var(--border)}
.metric:last-child{border-right:none}
.metric-val{font-family:var(--serif);font-size:1.9rem;font-weight:700;color:var(--amber)}
.metric-label{font-size:.72rem;color:var(--grey);letter-spacing:.1em;text-transform:uppercase;margin-top:.3rem}
.metric-sub{font-size:.78rem;color:var(--grey-l);margin-top:.2rem}

/* SECTIONS */
.section{padding:6rem 3.5rem}
.section--dark{background:var(--dark)}
.container{max-width:1160px;margin:0 auto}
.container-sm{max-width:860px;margin:0 auto}
.eyebrow{font-size:.7rem;letter-spacing:.22em;text-transform:uppercase;color:var(--amber);font-weight:600;margin-bottom:.6rem}
.h2{font-family:var(--serif);font-size:clamp(1.7rem,2.7vw,2.35rem);font-weight:700;line-height:1.18}
.h2 em{font-style:italic;color:var(--amber)}
.h3{font-family:var(--serif);font-size:1.15rem;font-weight:600;line-height:1.22}
.lead{color:var(--grey-l);font-size:.93rem;line-height:1.8}

/* ABOUT */
.about-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:6rem;align-items:start}
.about-label{font-size:.7rem;letter-spacing:.18em;text-transform:uppercase;color:var(--amber);font-weight:600;margin-bottom:1.2rem}
.about-text{color:var(--grey-l);font-size:.97rem;line-height:1.9}
.about-skills{margin-top:2.5rem}
.skill-tags{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:.8rem}
.skill-tag{font-size:.72rem;letter-spacing:.06em;border:1px solid var(--border);border-radius:2px;padding:.25rem .65rem;color:var(--grey-l);transition:border-color .2s,color .2s}
.skill-tag:hover{border-color:var(--amber);color:var(--amber)}

/* EXPERIENCE */
.exp-list{margin-top:1rem}
.exp-item{padding:2.5rem 0;border-bottom:1px solid var(--border);display:grid;grid-template-columns:1fr 2.4fr;gap:3rem;align-items:start}
.exp-item:last-child{border-bottom:none}
.exp-period{font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--amber);font-weight:600;margin-bottom:.4rem}
.exp-company{font-size:.82rem;color:var(--grey-l);line-height:1.5}
.exp-role{font-family:var(--serif);font-size:1.15rem;font-weight:700;margin-bottom:.6rem;line-height:1.2}
.exp-content .lead{font-size:.9rem;margin-bottom:.9rem}
.exp-bullets{list-style:none;margin-top:.8rem}
.exp-bullets li{padding:.45rem 0 .45rem 1.1rem;border-left:2px solid var(--border);font-size:.86rem;color:var(--grey-l);line-height:1.7;margin-bottom:.3rem;transition:border-color .2s}
.exp-bullets li:hover{border-color:var(--amber);color:var(--white)}

/* EDUCATION */
.edu-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--border);margin-top:3rem}
.edu-card{background:var(--dark);padding:2rem}
.edu-degree{font-family:var(--serif);font-size:1.05rem;font-weight:600;margin-bottom:.3rem}
.edu-inst{color:var(--amber);font-size:.82rem;font-weight:600;margin-bottom:.3rem}
.edu-detail{font-size:.8rem;color:var(--grey);font-style:italic}

/* PUBLICATIONS */
.pub-list{margin-top:2rem}
.pub-item{padding:1.5rem 0;border-bottom:1px solid var(--border);display:grid;grid-template-columns:auto 1fr;gap:1.5rem;align-items:start}
.pub-item:last-child{border-bottom:none}
.pub-year{font-family:var(--serif);font-size:1.2rem;font-weight:700;color:var(--border);min-width:3.5rem}
.pub-text{font-size:.86rem;color:var(--grey-l);line-height:1.7}
.pub-text strong{color:var(--white);font-weight:600}
.pub-tag{display:inline-block;margin-bottom:.4rem;font-size:.65rem;letter-spacing:.14em;text-transform:uppercase;color:var(--amber);font-weight:600;border:1px solid rgba(212,148,58,.3);border-radius:2px;padding:.15rem .5rem}

/* PATENT */
.patent-block{margin-top:2rem;padding:2rem;background:var(--card);border:1px solid var(--border);border-left:3px solid var(--amber);border-radius:2px}
.patent-block .h3{margin-bottom:.5rem}
.patent-id{font-size:.78rem;color:var(--amber);font-weight:600;margin-bottom:.5rem;letter-spacing:.06em}

/* CTA STRIP */
.cta-strip{padding:5rem 3.5rem;text-align:center;background:var(--dark);border-top:1px solid var(--border)}
.cta-strip .h2{margin-bottom:1rem}
.cta-strip .lead{max-width:560px;margin:0 auto 2rem}
.btns{display:flex;gap:.9rem;justify-content:center;flex-wrap:wrap}

/* FOOTER */
footer{background:var(--black);border-top:1px solid var(--border);padding:3rem 3.5rem 2rem}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:3rem;margin-bottom:2.5rem}
.footer-name{font-family:var(--serif);font-size:1.1rem;font-weight:700;margin-bottom:.5rem}
.footer-name span{color:var(--amber)}
.footer-tagline{font-size:.82rem;color:var(--grey);line-height:1.7}
.footer-col h5{font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--amber);font-weight:600;margin-bottom:.9rem}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:.4rem}
.footer-col a{color:var(--grey-l);text-decoration:none;font-size:.82rem;transition:color .2s}
.footer-col a:hover{color:var(--amber)}
.footer-bottom{border-top:1px solid var(--border);padding-top:1.5rem;display:flex;justify-content:space-between;font-size:.75rem;color:var(--grey)}

/* REVEAL */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease}
.reveal.visible{opacity:1;transform:none}

/* RESPONSIVE */
@media(max-width:900px){
  nav{padding:1rem 1.5rem}
  nav.scrolled{padding:.7rem 1.5rem}
  .hero{padding:0 1.5rem}
  .hero-inner{padding:7rem 0 4rem}
  .section{padding:4rem 1.5rem}
  .metrics{grid-template-columns:repeat(2,1fr)}
  .about-grid,.exp-item{grid-template-columns:1fr}
  .exp-item{gap:1rem}
  .edu-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .cta-strip{padding:3.5rem 1.5rem}
  footer{padding:2.5rem 1.5rem}
  .nav-links{display:none;flex-direction:column;position:absolute;top:100%;left:0;right:0;background:rgba(7,9,15,.98);padding:1.5rem;border-bottom:1px solid var(--border);gap:1rem}
  .nav-links.open{display:flex}
  .nav-toggle{display:flex}
}
@media(max-width:600px){
  .metrics{grid-template-columns:1fr 1fr}
  .pub-item{grid-template-columns:1fr}
}