:root{
  --ink:#141b2d;
  --ink-soft:#3a4358;
  --paper:#f6f4ee;
  --card:#ffffff;
  --teal:#0f6b62;
  --teal-deep:#0a4a44;
  --gold:#c8912a;
  --gold-soft:#f3e6c9;
  --line:#dcd7cb;
  --mono:'JetBrains Mono',monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Archivo',sans-serif;background:var(--paper);color:var(--ink);line-height:1.65;font-size:16px}
h1,h2,h3,.serif{font-family:'Fraunces',serif}
a{color:var(--teal);text-decoration:none}
a:hover{text-decoration:underline}
:focus-visible{outline:3px solid var(--gold);outline-offset:2px}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}

/* NAV */
nav{position:sticky;top:0;z-index:100;background:rgba(246,244,238,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
nav .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{font-family:'Fraunces',serif;font-weight:700;font-size:1.05rem;color:var(--ink)}
.brand span{color:var(--teal)}
.navlinks{display:flex;gap:26px;font-size:.85rem;font-weight:500}
.navlinks a{color:var(--ink-soft)}
.navlinks a:hover{color:var(--teal);text-decoration:none}
.menu-btn{display:none;background:none;border:1px solid var(--line);border-radius:8px;padding:8px 12px;font-size:1rem;cursor:pointer}

/* HERO */
header{position:relative;overflow:hidden;background:linear-gradient(160deg,var(--ink) 0%,#1b2740 55%,var(--teal-deep) 100%);color:#f2efe6}
header::after{content:"";position:absolute;inset:0;background:radial-gradient(ellipse at 80% 20%,rgba(200,145,42,.18),transparent 55%);pointer-events:none}
.hero{display:grid;grid-template-columns:1.3fr .95fr;gap:48px;padding:88px 0 96px;position:relative;z-index:1;align-items:center}
.eyebrow{font-family:var(--mono);font-size:.75rem;letter-spacing:.18em;text-transform:uppercase;color:var(--gold);margin-bottom:18px}
.hero h1{font-size:clamp(2.1rem,4.6vw,3.3rem);line-height:1.08;font-weight:700;margin-bottom:18px}
.hero h1 em{font-style:italic;color:#ffd98a}
.hero .role{font-size:1.08rem;color:#c9d2e4;margin-bottom:26px;max-width:34rem}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:34px}
.tag{font-family:var(--mono);font-size:.72rem;padding:6px 12px;border:1px solid rgba(255,255,255,.25);border-radius:999px;color:#dfe6f2}
.cta-row{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:13px 26px;border-radius:10px;font-weight:600;font-size:.9rem;transition:.2s}
.btn-gold{background:var(--gold);color:#1c1607}
.btn-gold:hover{background:#e0a83a;text-decoration:none;transform:translateY(-2px)}
.btn-ghost{border:1.5px solid rgba(255,255,255,.4);color:#fff}
.btn-ghost:hover{border-color:var(--gold);color:var(--gold);text-decoration:none}

/* HERO PHOTO SIDE */
.hero-side{display:flex;flex-direction:column;align-items:center;gap:24px}
.photo-frame{position:relative;width:min(260px,70vw)}
.photo-frame::before{content:"";position:absolute;inset:-14px;border:2px solid var(--gold);border-radius:22px;transform:rotate(-3deg);opacity:.7}
.photo-frame img{width:100%;display:block;border-radius:18px;box-shadow:0 24px 50px rgba(0,0,0,.45);position:relative;border:4px solid rgba(255,255,255,.12);background:#fff}
.photo-badge{position:absolute;bottom:-16px;left:50%;transform:translateX(-50%);background:var(--gold);color:#1c1607;font-family:var(--mono);font-size:.68rem;font-weight:600;letter-spacing:.1em;padding:7px 16px;border-radius:999px;white-space:nowrap;box-shadow:0 8px 20px rgba(0,0,0,.35)}
.hero-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.15);border-radius:18px;padding:24px 28px;backdrop-filter:blur(6px);width:100%}
.hero-card h3{font-size:.95rem;color:var(--gold);margin-bottom:14px;letter-spacing:.04em}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;text-align:center}
.stat b{display:block;font-family:'Fraunces',serif;font-size:1.7rem;color:#fff;line-height:1}
.stat span{font-size:.7rem;color:#b8c2d6}

/* SECTIONS */
section{padding:78px 0}
.sec-head{display:flex;align-items:baseline;gap:18px;margin-bottom:40px}
.sec-num{font-family:var(--mono);font-size:.8rem;color:var(--gold);letter-spacing:.15em}
.sec-head h2{font-size:clamp(1.7rem,3.4vw,2.4rem);font-weight:700}
.sec-head::after{content:"";flex:1;height:1px;background:var(--line)}
.lead{max-width:46rem;color:var(--ink-soft);margin-bottom:34px}
.alt-bg{background:#efece3}

/* ABOUT */
.about-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:44px}
.info-card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:28px}
.info-card h3{font-size:1.05rem;margin-bottom:14px;color:var(--teal-deep)}
.info-list{list-style:none;font-size:.9rem}
.info-list li{padding:9px 0;border-bottom:1px dashed var(--line);display:flex;gap:10px}
.info-list li:last-child{border:none}
.info-list b{min-width:96px;color:var(--ink-soft);font-weight:600}
.kw{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.kw span{background:var(--gold-soft);color:#6b4c0e;font-size:.8rem;font-weight:500;padding:7px 14px;border-radius:999px}

/* TIMELINE */
.timeline{position:relative;padding-left:34px}
.timeline::before{content:"";position:absolute;left:9px;top:6px;bottom:6px;width:2px;background:linear-gradient(var(--teal),var(--gold))}
.tl-item{position:relative;padding:0 0 34px}
.tl-item::before{content:"";position:absolute;left:-31px;top:6px;width:14px;height:14px;border-radius:50%;background:var(--paper);border:3px solid var(--teal)}
.tl-item.current::before{background:var(--gold);border-color:var(--gold)}
.tl-date{font-family:var(--mono);font-size:.74rem;color:var(--teal);letter-spacing:.06em}
.tl-item h3{font-size:1.1rem;margin:4px 0 2px}
.tl-item p{font-size:.9rem;color:var(--ink-soft)}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:56px}

/* PUBLICATIONS */
#publications{background:var(--ink);color:#e9ecf3}
#publications .sec-head h2{color:#fff}
#publications .sec-head::after{background:#2c364d}
.pub-filters{display:flex;gap:10px;margin-bottom:28px;flex-wrap:wrap}
.pf{background:none;border:1px solid #3a465f;color:#aab4c8;font-family:var(--mono);font-size:.75rem;padding:8px 16px;border-radius:999px;cursor:pointer;transition:.2s}
.pf.active,.pf:hover{background:var(--gold);border-color:var(--gold);color:#1c1607}
.pub{background:#1b2438;border:1px solid #2c364d;border-radius:14px;padding:22px 24px;margin-bottom:14px;display:flex;gap:18px;transition:.25s}
.pub:hover{border-color:var(--gold);transform:translateX(6px)}
.pub-id{font-family:var(--mono);font-size:.8rem;color:var(--gold);min-width:42px;padding-top:2px}
.pub h3{font-size:1rem;font-weight:600;color:#fff;margin-bottom:6px;line-height:1.45}
.pub .meta{font-size:.82rem;color:#93a0b8}
.pub .meta em{color:#c6cfdf;font-style:normal}
.badge{display:inline-block;font-family:var(--mono);font-size:.66rem;background:#0f6b62;color:#c8f2ec;padding:3px 9px;border-radius:5px;margin-left:8px;vertical-align:1px}
.badge.doi{background:#3a465f;color:#c9d2e4}
.pub-links{margin-top:26px;display:flex;gap:22px;font-size:.88rem;flex-wrap:wrap}
.pub-links a{color:var(--gold)}

/* CARDS */
.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:22px}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:26px;transition:.25s}
.card:hover{transform:translateY(-4px);box-shadow:0 14px 34px rgba(20,27,45,.09)}
.card .icon{width:44px;height:44px;border-radius:12px;background:var(--gold-soft);display:flex;align-items:center;justify-content:center;font-size:1.2rem;margin-bottom:16px}
.card h3{font-size:1.05rem;margin-bottom:10px;color:var(--teal-deep)}
.card ul{list-style:none;font-size:.88rem;color:var(--ink-soft)}
.card ul li{padding:6px 0 6px 20px;position:relative}
.card ul li::before{content:"◆";position:absolute;left:0;top:6px;font-size:.55rem;color:var(--gold)}
.role-note{font-family:var(--mono);font-size:.68rem;color:var(--teal);letter-spacing:.1em;text-transform:uppercase}

/* TEACHING */
.course-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:12px;counter-reset:course}
.course{background:var(--card);border:1px solid var(--line);border-left:4px solid var(--teal);border-radius:10px;padding:14px 16px;font-size:.88rem;font-weight:500;counter-increment:course;display:flex;gap:10px;align-items:baseline}
.course::before{content:counter(course,decimal-leading-zero);font-family:var(--mono);font-size:.7rem;color:var(--gold)}

/* CONTACT */
#contact{background:linear-gradient(140deg,var(--teal-deep),var(--ink));color:#eef1f7}
#contact .sec-head h2{color:#fff}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:44px}
.c-item{display:flex;gap:14px;padding:14px 0;border-bottom:1px solid rgba(255,255,255,.12);font-size:.92rem;align-items:baseline}
.c-item b{min-width:110px;color:var(--gold);font-weight:600}
.c-item a{color:#fff}
footer{background:#0d1220;color:#7d879c;text-align:center;padding:26px;font-size:.8rem}
footer b{color:#c9d2e4}

/* ANIMATION */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .pub:hover,.card:hover,.btn-gold:hover{transform:none}
}
@media (max-width:860px){
  .hero,.about-grid,.two-col,.contact-grid{grid-template-columns:1fr}
  .hero{padding:56px 0 66px;gap:40px}
  .hero-side{order:-1}
  .navlinks{display:none;position:absolute;top:64px;left:0;right:0;background:var(--paper);flex-direction:column;padding:18px 24px;border-bottom:1px solid var(--line);gap:16px}
  .navlinks.open{display:flex}
  .menu-btn{display:block}
  .stat-grid{grid-template-columns:repeat(4,1fr)}
}