/* ===========================================================
   Prof. Ajoy Kumar Khan — Portfolio
   Design system: scholarly navy + gold, serif/sans pairing
   =========================================================== */

:root{
  --navy:#0c1a3c;
  --navy-2:#13234d;
  --navy-3:#1b2f5e;
  --ink:#1d2433;
  --body:#3a4256;
  --muted:#6b7488;
  --gold:#b88a2f;
  --gold-soft:#c9a45c;
  --gold-tint:#f3ead6;
  --paper:#fbfaf7;
  --paper-2:#f4f1ea;
  --line:#e6e2d8;
  --white:#ffffff;
  --shadow-sm:0 1px 3px rgba(12,26,60,.06),0 6px 18px rgba(12,26,60,.06);
  --shadow-md:0 10px 40px rgba(12,26,60,.10);
  --shadow-lg:0 24px 70px rgba(12,26,60,.18);
  --radius:14px;
  --radius-sm:10px;
  --maxw:1180px;
  --serif:"Lora",Georgia,"Times New Roman",serif;
  --sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --mono:"Spline Sans Mono",ui-monospace,SFMono-Regular,monospace;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:90px}
body{
  margin:0;
  font-family:var(--sans);
  color:var(--body);
  background:var(--paper);
  font-size:17px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--serif);color:var(--ink);line-height:1.18;font-weight:600;margin:0}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}
.section{padding:96px 0}
.section--tight{padding:64px 0}
.bg-paper2{background:var(--paper-2)}

/* ---------- Eyebrow + section titles ---------- */
.eyebrow{
  font-family:var(--sans);
  text-transform:uppercase;
  letter-spacing:.22em;
  font-size:12.5px;
  font-weight:600;
  color:var(--gold);
  margin:0 0 14px;
  display:inline-flex;align-items:center;gap:10px;
}
.eyebrow::before{content:"";width:26px;height:1.5px;background:var(--gold);display:inline-block}
.section-title{font-size:clamp(28px,4vw,42px);letter-spacing:-.01em;margin-bottom:14px}
.section-lead{max-width:680px;color:var(--muted);font-size:18px;margin:0 0 8px}
.center{text-align:center}
.center .eyebrow{justify-content:center}
.center .section-lead{margin-left:auto;margin-right:auto}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--sans);font-weight:600;font-size:15px;
  padding:13px 26px;border-radius:999px;cursor:pointer;border:1.5px solid transparent;
  transition:transform .25s ease,box-shadow .25s ease,background .25s ease,color .25s ease;
}
.btn--gold{background:var(--gold);color:#fff;box-shadow:0 8px 24px rgba(184,138,47,.32)}
.btn--gold:hover{transform:translateY(-2px);box-shadow:0 14px 32px rgba(184,138,47,.42)}
.btn--ghost{border-color:rgba(255,255,255,.4);color:#fff}
.btn--ghost:hover{background:rgba(255,255,255,.12);border-color:#fff}
.btn--dark{border-color:var(--navy);color:var(--navy)}
.btn--dark:hover{background:var(--navy);color:#fff;transform:translateY(-2px)}

/* ===========================================================
   NAVBAR
   =========================================================== */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(251,250,247,.0);
  transition:background .35s ease,box-shadow .35s ease,padding .35s ease;
  padding:20px 0;
}
.nav.scrolled{background:rgba(251,250,247,.92);backdrop-filter:blur(12px);box-shadow:0 1px 0 var(--line);padding:12px 0}
.nav__inner{display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:13px}
.brand__mark{
  width:42px;height:42px;border-radius:11px;flex:none;
  background:linear-gradient(140deg,var(--navy-2),var(--navy));
  color:var(--gold-soft);font-family:var(--serif);font-weight:600;font-size:19px;
  display:grid;place-items:center;border:1px solid rgba(201,164,92,.4);
  box-shadow:var(--shadow-sm);
}
.brand__txt{display:flex;flex-direction:column;line-height:1.15}
.brand__name{font-family:var(--serif);font-weight:600;font-size:18px;color:var(--ink)}
.brand__sub{font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.nav.transparent .brand__name{color:#fff}
.nav.transparent .brand__sub{color:rgba(255,255,255,.7)}

.nav__links{display:flex;align-items:center;gap:6px}
.nav__links a{
  font-size:14.5px;font-weight:500;color:var(--ink);padding:9px 15px;border-radius:8px;
  transition:color .2s,background .2s;position:relative;
}
.nav.transparent .nav__links a{color:rgba(255,255,255,.88)}
.nav__links a:hover{color:var(--gold)}
.nav__links a.active{color:var(--gold)}
.nav.transparent .nav__links a:hover,.nav.transparent .nav__links a.active{color:var(--gold-soft)}
.nav__cta{margin-left:8px}

.nav__toggle{display:none;background:none;border:0;cursor:pointer;width:42px;height:42px;flex-direction:column;justify-content:center;gap:5px;padding:0}
.nav__toggle span{display:block;height:2px;width:24px;background:var(--ink);margin:0 auto;transition:.3s;border-radius:2px}
.nav.transparent .nav__toggle span{background:#fff}

/* ===========================================================
   HERO
   =========================================================== */
.hero{
  position:relative;color:#fff;overflow:hidden;
  background:radial-gradient(120% 120% at 80% -10%,#1c3061 0%,var(--navy-2) 40%,var(--navy) 100%);
  padding:160px 0 90px;
}
.hero__grid{display:grid;grid-template-columns:1.15fr .85fr;gap:60px;align-items:center}
.hero__eyebrow{color:var(--gold-soft)}
.hero__eyebrow::before{background:var(--gold-soft)}
.hero h1{color:#fff;font-size:clamp(38px,5.4vw,64px);letter-spacing:-.02em;margin-bottom:18px}
.hero h1 .accent{color:var(--gold-soft);display:block;font-style:italic;font-size:.62em;font-weight:500;margin-top:8px;letter-spacing:0}
.hero__role{font-size:19px;color:rgba(255,255,255,.85);max-width:540px;margin-bottom:14px}
.hero__role strong{color:#fff;font-weight:600}
.hero__tags{display:flex;flex-wrap:wrap;gap:8px;margin:24px 0 30px}
.hero__tags span{
  font-size:13px;padding:7px 14px;border-radius:999px;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);color:rgba(255,255,255,.9)
}
.hero__cta{display:flex;flex-wrap:wrap;gap:14px}

.hero__portrait{position:relative;justify-self:center}
.hero__portrait img{
  width:330px;height:410px;object-fit:cover;object-position:top center;
  border-radius:18px;box-shadow:var(--shadow-lg);
  border:1px solid rgba(255,255,255,.15);position:relative;z-index:2;
}
.hero__frame{
  position:absolute;inset:auto;top:24px;left:24px;width:330px;height:410px;
  border:2px solid var(--gold-soft);border-radius:18px;z-index:1;opacity:.6
}
.hero__quote{
  position:relative;z-index:2;width:330px;margin:28px auto 0;padding:0;
  border:0;font-family:var(--serif);font-style:italic;font-weight:500;
  font-size:15px;line-height:1.55;text-align:center;color:rgba(255,255,255,.82);
}
.hero__quote::before{
  content:"";display:block;width:34px;height:2px;background:var(--gold-soft);
  margin:0 auto 14px;opacity:.8;
}
.hero__badge{
  position:absolute;z-index:3;bottom:-22px;left:-26px;
  background:#fff;color:var(--ink);border-radius:14px;padding:16px 20px;
  box-shadow:var(--shadow-md);display:flex;flex-direction:column;min-width:150px;
}
.hero__badge b{font-family:var(--serif);font-size:26px;color:var(--navy)}
.hero__badge small{font-size:12px;color:var(--muted);letter-spacing:.04em}

/* hex motif */
.hero__motif{position:absolute;inset:0;opacity:.07;pointer-events:none;
  background-image:radial-gradient(circle at center,rgba(255,255,255,.9) 1px,transparent 1.4px);
  background-size:26px 26px;mask-image:linear-gradient(180deg,#000,transparent 70%)}

/* ---------- Hero stats bar ---------- */
.hero-stats{background:var(--navy);color:#fff;border-top:1px solid rgba(255,255,255,.08)}
.hero-stats__grid{display:grid;grid-template-columns:repeat(5,1fr);gap:0}
.hstat{padding:30px 18px;text-align:center;border-right:1px solid rgba(255,255,255,.08)}
.hstat:last-child{border-right:0}
.hstat b{display:block;font-family:var(--serif);font-size:40px;color:var(--gold-soft);line-height:1}
.hstat span{display:block;margin-top:8px;font-size:13px;letter-spacing:.05em;color:rgba(255,255,255,.75)}

/* ===========================================================
   ABOUT
   =========================================================== */
.about__grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:60px;align-items:center}
.about__media{position:relative}
.about__media img{border-radius:var(--radius);box-shadow:var(--shadow-md);width:100%}
.about__media::before{content:"";position:absolute;inset:18px -18px -18px 18px;border:2px solid var(--gold-soft);border-radius:var(--radius);z-index:-1;opacity:.5}
.about p{margin:0 0 18px}
.about p .lead{font-size:20px;color:var(--ink)}
.signature{font-family:var(--serif);font-style:italic;font-size:22px;color:var(--navy);margin-top:8px}
.signature small{display:block;font-style:normal;font-family:var(--sans);font-size:13px;color:var(--muted);letter-spacing:.05em;margin-top:4px}

.quote-card{
  border-left:3px solid var(--gold);background:var(--white);padding:22px 26px;border-radius:0 12px 12px 0;
  box-shadow:var(--shadow-sm);font-family:var(--serif);font-style:italic;font-size:18px;color:var(--ink);margin:6px 0 26px
}

/* ===========================================================
   RESEARCH INTEREST CARDS
   =========================================================== */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.cards--2{grid-template-columns:repeat(2,1fr)}
.icard{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 26px;transition:transform .3s ease,box-shadow .3s ease,border-color .3s;
  position:relative;overflow:hidden;
}
.icard::after{content:"";position:absolute;top:0;left:0;width:100%;height:3px;background:linear-gradient(90deg,var(--gold),var(--gold-soft));transform:scaleX(0);transform-origin:left;transition:transform .35s ease}
.icard:hover{transform:translateY(-6px);box-shadow:var(--shadow-md);border-color:transparent}
.icard:hover::after{transform:scaleX(1)}
.icard__ico{
  width:52px;height:52px;border-radius:12px;display:grid;place-items:center;margin-bottom:18px;
  background:var(--gold-tint);color:var(--gold);font-size:24px;
}
.icard h3{font-size:20px;margin-bottom:8px}
.icard p{margin:0;font-size:15px;color:var(--muted);line-height:1.6}

/* ===========================================================
   TIMELINE
   =========================================================== */
.tl-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px}
.timeline{position:relative;padding-left:30px}
.timeline::before{content:"";position:absolute;left:5px;top:6px;bottom:6px;width:2px;background:var(--line)}
.tl-item{position:relative;padding-bottom:30px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{content:"";position:absolute;left:-30px;top:5px;width:12px;height:12px;border-radius:50%;background:var(--white);border:2.5px solid var(--gold);z-index:1}
.tl-item .yr{font-family:var(--mono);font-size:12.5px;color:var(--gold);letter-spacing:.03em;font-weight:500}
.tl-item h4{font-size:17.5px;margin:3px 0 2px}
.tl-item p{margin:0;font-size:14.5px;color:var(--muted)}
.tl-head{font-family:var(--serif);font-size:22px;color:var(--ink);margin-bottom:24px;display:flex;align-items:center;gap:10px}
.tl-head .dot{width:8px;height:8px;border-radius:50%;background:var(--gold)}

/* ===========================================================
   PROJECTS
   =========================================================== */
.proj{display:flex;flex-direction:column;gap:18px}
.proj-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:26px 28px;
  display:grid;grid-template-columns:auto 1fr auto;gap:24px;align-items:center;transition:box-shadow .3s,transform .3s
}
.proj-card:hover{box-shadow:var(--shadow-md);transform:translateY(-3px)}
.proj-card .agency{font-family:var(--mono);font-size:13px;font-weight:600;color:var(--navy);background:var(--gold-tint);padding:8px 14px;border-radius:8px;white-space:nowrap}
.proj-card h4{font-size:17px;margin:0 0 4px;line-height:1.4}
.proj-card .meta{font-size:14px;color:var(--muted)}
.proj-card .role{text-align:right}
.proj-card .role b{font-family:var(--serif);font-size:16px;color:var(--ink);display:block}
.proj-card .role .cost{font-family:var(--mono);font-size:13px;color:var(--gold);font-weight:600}
.tag-status{font-size:11px;text-transform:uppercase;letter-spacing:.08em;padding:3px 10px;border-radius:999px;font-weight:600}
.tag-status.ongoing{background:#e7f3ec;color:#1f7a45}
.tag-status.done{background:#eef0f5;color:#4a5570}

/* patent banner */
.patent{
  background:linear-gradient(120deg,var(--navy-2),var(--navy));color:#fff;border-radius:var(--radius);
  padding:40px 44px;display:grid;grid-template-columns:auto 1fr;gap:30px;align-items:center;box-shadow:var(--shadow-md)
}
.patent .seal{width:84px;height:84px;border-radius:50%;border:2px solid var(--gold-soft);display:grid;place-items:center;font-size:36px;color:var(--gold-soft)}
.patent h3{color:#fff;font-size:22px;margin-bottom:6px}
.patent p{margin:0;color:rgba(255,255,255,.82);font-size:15px}
.patent .tagn{font-family:var(--mono);color:var(--gold-soft);font-size:13px;margin-top:8px}

/* ===========================================================
   PUBLICATIONS
   =========================================================== */
.pub-toolbar{display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;margin-bottom:34px}
.pub-search{position:relative;flex:1;min-width:240px;max-width:420px}
.pub-search input{
  width:100%;padding:13px 16px 13px 44px;border:1.5px solid var(--line);border-radius:999px;
  font-family:var(--sans);font-size:15px;background:var(--white);color:var(--ink);transition:border-color .2s,box-shadow .2s
}
.pub-search input:focus{outline:none;border-color:var(--gold);box-shadow:0 0 0 4px rgba(184,138,47,.12)}
.pub-search svg{position:absolute;left:16px;top:50%;transform:translateY(-50%);color:var(--muted)}
.pub-filters{display:flex;gap:8px;flex-wrap:wrap}
.chip{
  font-size:13.5px;font-weight:500;padding:9px 18px;border-radius:999px;border:1.5px solid var(--line);
  background:var(--white);cursor:pointer;color:var(--body);transition:all .2s
}
.chip:hover{border-color:var(--gold-soft)}
.chip.active{background:var(--navy);color:#fff;border-color:var(--navy)}

.pubtabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:30px;flex-wrap:wrap}
.pubtab{
  font-family:var(--sans);font-size:15px;font-weight:600;color:var(--muted);background:none;border:0;
  padding:14px 20px;cursor:pointer;position:relative;transition:color .2s
}
.pubtab .n{font-family:var(--mono);font-size:12px;color:var(--gold);margin-left:6px}
.pubtab.active{color:var(--ink)}
.pubtab::after{content:"";position:absolute;left:14px;right:14px;bottom:-1px;height:2.5px;background:var(--gold);transform:scaleX(0);transition:transform .25s}
.pubtab.active::after{transform:scaleX(1)}

.pub-list{display:flex;flex-direction:column;gap:2px}
.pub-item{
  display:grid;grid-template-columns:auto 1fr;gap:22px;padding:22px 22px;border-radius:12px;
  transition:background .25s;border:1px solid transparent
}
.pub-item:hover{background:var(--white);border-color:var(--line);box-shadow:var(--shadow-sm)}
.pub-item .pnum{font-family:var(--serif);font-size:18px;color:var(--gold-soft);font-weight:600;padding-top:2px;min-width:34px}
.pub-item .ptitle{font-family:var(--serif);font-size:18px;color:var(--ink);line-height:1.45;margin:0 0 6px;font-weight:600}
.pub-item .pmeta{font-size:14.5px;color:var(--muted);line-height:1.55}
.pub-badges{display:flex;flex-wrap:wrap;gap:7px;margin-top:10px;align-items:center}
.badge{font-size:11.5px;font-weight:600;letter-spacing:.03em;padding:4px 10px;border-radius:6px;text-transform:uppercase}
.badge.q1{background:#e4f0e8;color:#1f7a45}
.badge.q2{background:#e9f0f7;color:#2a5d9c}
.badge.sci{background:#f3ead6;color:#9a6f1e}
.badge.role{background:#eef0f5;color:#525d78}
.badge.if{background:var(--navy);color:#fff}
.pub-doi{font-family:var(--mono);font-size:12.5px;color:var(--gold);display:inline-flex;align-items:center;gap:5px;margin-top:8px}
.pub-doi:hover{text-decoration:underline}
.pub-empty{padding:40px;text-align:center;color:var(--muted)}

/* ===========================================================
   SCHOLARS TABLE
   =========================================================== */
.scholar-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.scholar{
  background:var(--white);border:1px solid var(--line);border-radius:12px;padding:18px 22px;
  display:flex;align-items:center;gap:16px;transition:transform .25s,box-shadow .25s
}
.scholar:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm)}
.scholar .av{
  width:46px;height:46px;border-radius:50%;flex:none;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--navy-2),var(--navy));color:var(--gold-soft);
  font-family:var(--serif);font-weight:600;font-size:17px
}
.scholar .info b{font-size:16px;color:var(--ink);font-family:var(--serif);display:block;line-height:1.3}
.scholar .info span{font-size:13px;color:var(--muted)}
.scholar .st{margin-left:auto;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.05em;padding:5px 11px;border-radius:999px;white-space:nowrap}
.st.awarded{background:#e4f0e8;color:#1f7a45}
.st.submitted{background:#fff3e0;color:#a96a12}
.st.pursuing{background:#e9f0f7;color:#2a5d9c}

/* lecture / org lists */
.feed{display:flex;flex-direction:column;gap:0}
.feed-item{display:grid;grid-template-columns:130px 1fr;gap:22px;padding:20px 0;border-bottom:1px solid var(--line)}
.feed-item:last-child{border-bottom:0}
.feed-item .when{font-family:var(--mono);font-size:13px;color:var(--gold);font-weight:500}
.feed-item h4{font-size:17px;margin:0 0 4px;color:var(--ink);font-weight:600}
.feed-item .ven{font-size:14.5px;color:var(--muted)}
.feed-item .lvl{display:inline-block;margin-top:6px;font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:var(--gold);font-weight:600}

/* ===========================================================
   GALLERY
   =========================================================== */
.gallery{columns:3;column-gap:20px}
.gcard{break-inside:avoid;margin-bottom:20px;border-radius:var(--radius);overflow:hidden;position:relative;cursor:pointer;box-shadow:var(--shadow-sm);background:var(--navy)}
.gcard img{width:100%;transition:transform .6s cubic-bezier(.2,.6,.2,1);display:block}
.gcard:hover img{transform:scale(1.06)}
.gcard__cap{
  position:absolute;inset:0;display:flex;flex-direction:column;justify-content:flex-end;
  padding:22px;color:#fff;
  background:linear-gradient(180deg,transparent 45%,rgba(8,16,40,.85) 100%);
  opacity:1;transition:opacity .3s
}
.gcard__cap b{font-family:var(--serif);font-size:18px;line-height:1.3}
.gcard__cap span{font-size:13px;color:rgba(255,255,255,.82);margin-top:3px}

/* lightbox */
.lightbox{position:fixed;inset:0;z-index:300;background:rgba(8,14,32,.94);display:none;align-items:center;justify-content:center;padding:40px}
.lightbox.open{display:flex}
.lightbox img{max-width:90vw;max-height:82vh;border-radius:10px;box-shadow:var(--shadow-lg)}
.lightbox__cap{position:absolute;bottom:32px;left:0;right:0;text-align:center;color:#fff;font-family:var(--serif);font-size:18px}
.lightbox__close{position:absolute;top:26px;right:30px;background:none;border:0;color:#fff;font-size:34px;cursor:pointer;line-height:1}
.lightbox__nav{position:absolute;top:50%;transform:translateY(-50%);background:rgba(255,255,255,.12);border:0;color:#fff;width:52px;height:52px;border-radius:50%;font-size:24px;cursor:pointer;transition:background .2s}
.lightbox__nav:hover{background:rgba(255,255,255,.25)}
.lightbox__nav.prev{left:24px}
.lightbox__nav.next{right:24px}

/* ===========================================================
   PAGE HEADER (interior pages)
   =========================================================== */
.pagehead{
  background:radial-gradient(120% 130% at 85% -20%,#1c3061,var(--navy-2) 45%,var(--navy));
  color:#fff;padding:150px 0 70px;position:relative;overflow:hidden
}
.pagehead .hero__motif{opacity:.06}
.pagehead h1{color:#fff;font-size:clamp(34px,5vw,52px);margin-bottom:14px}
.pagehead p{color:rgba(255,255,255,.82);max-width:620px;font-size:18px;margin:0}
.crumbs{font-size:13px;color:var(--gold-soft);letter-spacing:.04em;margin-bottom:18px}
.crumbs a:hover{color:#fff}

/* ===========================================================
   FOOTER
   =========================================================== */
.footer{background:var(--navy);color:rgba(255,255,255,.7);padding:70px 0 30px}
.footer__grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:48px;padding-bottom:46px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer h4{color:#fff;font-size:15px;letter-spacing:.04em;margin-bottom:18px;font-family:var(--sans);text-transform:uppercase;font-weight:600}
.footer__brand .brand__name{color:#fff;font-size:22px}
.footer p{font-size:15px;line-height:1.7;margin:0 0 8px}
.footer a{transition:color .2s}
.footer a:hover{color:var(--gold-soft)}
.footer ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:11px;font-size:15px}
.footer .contact-row{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;margin-bottom:12px}
.footer .contact-row .ic{color:var(--gold-soft);flex:none;margin-top:2px}
.footer__bottom{padding-top:26px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:13.5px;color:rgba(255,255,255,.55)}
.footer__bottom a{color:rgba(255,255,255,.7)}

/* ===========================================================
   REVEAL ANIMATIONS
   =========================================================== */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
.reveal[data-d="1"]{transition-delay:.08s}
.reveal[data-d="2"]{transition-delay:.16s}
.reveal[data-d="3"]{transition-delay:.24s}
.reveal[data-d="4"]{transition-delay:.32s}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}html{scroll-behavior:auto}}

/* ===========================================================
   RESPONSIVE
   =========================================================== */
@media (max-width:980px){
  .hero__grid{grid-template-columns:1fr;gap:50px;text-align:center}
  .hero__eyebrow,.hero__tags{justify-content:center}
  .hero__cta{justify-content:center}
  .hero__role{margin-left:auto;margin-right:auto}
  .hero-stats__grid{grid-template-columns:repeat(3,1fr)}
  .hstat:nth-child(3){border-right:0}
  .about__grid,.tl-grid,.about__media{grid-template-columns:1fr}
  .about__media{max-width:420px;margin:0 auto 16px}
  .cards{grid-template-columns:repeat(2,1fr)}
  .gallery{columns:2}
  .footer__grid{grid-template-columns:1fr 1fr}
}
@media (max-width:680px){
  body{font-size:16px}
  .section{padding:64px 0}
  .nav__links{
    position:fixed;inset:0 0 0 auto;width:min(80vw,320px);background:var(--navy);
    flex-direction:column;align-items:flex-start;justify-content:flex-start;gap:6px;
    padding:90px 28px 40px;transform:translateX(100%);transition:transform .35s ease;box-shadow:var(--shadow-lg)
  }
  .nav__links.open{transform:none}
  .nav__links a{color:#fff!important;width:100%;font-size:17px;padding:13px 12px}
  .nav__cta{margin:14px 0 0}
  .nav__toggle{display:flex;z-index:101}
  .nav__toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav__toggle.open span:nth-child(2){opacity:0}
  .nav__toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .nav.transparent .nav__toggle.open span{background:#fff}
  .hero-stats__grid{grid-template-columns:repeat(2,1fr)}
  .hstat{border-right:0;border-bottom:1px solid rgba(255,255,255,.08)}
  .cards{grid-template-columns:1fr}
  .gallery{columns:1}
  .footer__grid{grid-template-columns:1fr}
  .proj-card{grid-template-columns:1fr;gap:14px}
  .proj-card .role{text-align:left}
  .feed-item{grid-template-columns:1fr;gap:6px}
  .scholar-grid{grid-template-columns:1fr}
  .patent{grid-template-columns:1fr;text-align:center}
  .patent .seal{margin:0 auto}
  .pub-item{grid-template-columns:1fr;gap:6px}
  .pub-item .pnum{display:none}
}