/* =====================================================================
   UCAT / Ishan Thakkar — site styles
   Palette derived from the UCAT logo (UK navy + circuit teal/copper).
   Signature motif: a circuit-trace hairline echoing the wordmark.
   ===================================================================== */

:root{
  --navy:#0A2260; --navy2:#0E2E6E; --blue:#1A4C97;
  --teal:#2E7A80; --copper:#A9744C; --slate:#33455C;
  --paper:#F7F8F5; --panel:#FFFFFF; --ink:#171A1F; --mut:#5B6470;
  --line:#E4E6DF; --line2:#EEEFE9;
  --trace:linear-gradient(90deg,var(--copper) 0%,var(--teal) 34%,var(--blue) 68%,var(--navy) 100%);
  --maxw:1090px; --r:10px;
  --shadow:0 1px 2px rgba(10,34,96,.04),0 8px 30px rgba(10,34,96,.06);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; background:var(--paper); color:var(--ink);
  font:400 17px/1.62 "IBM Plex Sans",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{font-family:"Space Grotesk","IBM Plex Sans",sans-serif;line-height:1.12;color:var(--navy);font-weight:600;letter-spacing:-.01em;margin:0}
a{color:var(--blue);text-decoration:none;text-underline-offset:2px}
a:hover{text-decoration:underline}
p{margin:0 0 1rem}
img{max-width:100%;display:block}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.mono{font-family:"IBM Plex Mono",ui-monospace,monospace}

/* ---------- Header / nav ---------- */
.top-strip{height:3px;background:var(--trace)}
.site-header{position:sticky;top:0;z-index:40;background:rgba(247,248,245,.9);backdrop-filter:saturate(1.4) blur(8px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:20px;height:68px}
.brand{display:flex;align-items:center;gap:12px;margin-right:auto}
.brand img{height:44px;width:auto}
.brand .bt{font-family:"Space Grotesk",sans-serif;font-weight:600;font-size:15px;color:var(--navy);line-height:1.15}
.brand .bt small{display:block;font-weight:400;font-size:11.5px;color:var(--mut);letter-spacing:.02em}
.nav-links{display:flex;gap:4px;align-items:center;flex-wrap:wrap}
.nav-links a{
  font-family:"IBM Plex Mono",monospace;font-size:13px;letter-spacing:.02em;
  color:var(--slate);padding:8px 12px;border-radius:8px;text-decoration:none
}
.nav-links a:hover{background:var(--line2);color:var(--navy);text-decoration:none}
.nav-links a[aria-current="page"]{color:var(--navy);background:#fff;box-shadow:inset 0 0 0 1px var(--line)}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:8px;padding:8px 10px;cursor:pointer;color:var(--navy)}

/* ---------- Section scaffolding ---------- */
main{padding:8px 0 40px}
.section{padding:46px 0;border-top:1px solid var(--line2)}
.section:first-of-type{border-top:none}
.eyebrow{font-family:"IBM Plex Mono",monospace;font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--teal);margin:0 0 10px}
.h-lead{display:inline-block;padding-bottom:8px;background-image:var(--trace);background-repeat:no-repeat;background-position:0 100%;background-size:56px 3px}
h2.sec{font-size:clamp(24px,3.2vw,32px);margin-bottom:22px}

/* ---------- Hero ---------- */
.hero{padding:52px 0 30px}
.hero-grid{display:grid;grid-template-columns:1.55fr .9fr;gap:44px;align-items:center}
.hero h1{font-size:clamp(30px,5vw,50px);letter-spacing:-.02em}
.hero .role{font-size:18px;color:var(--slate);margin-top:14px;font-weight:500}
.hero .aff{color:var(--mut);margin-top:2px}
.hero .lab{margin-top:6px;font-size:15.5px}
.hero .thesis{margin-top:20px;font-size:18px;max-width:46ch;color:#2a2f38}
.hero-side{display:flex;flex-direction:column;align-items:center;gap:18px}
.portrait{width:210px;height:210px;border-radius:14px;object-fit:cover;box-shadow:var(--shadow);background:#fff;border:1px solid var(--line)}
.monogram{width:210px;height:210px;border-radius:14px;display:grid;place-items:center;background:
  radial-gradient(120% 120% at 20% 0%,#12306e,#0a1f52);color:#fff;font-family:"Space Grotesk";font-weight:600;font-size:64px;box-shadow:var(--shadow)}
.hero-logo{width:150px;opacity:.96}

.links{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.btn{
  display:inline-flex;align-items:center;gap:8px;font-family:"IBM Plex Mono",monospace;font-size:13px;
  padding:9px 14px;border-radius:9px;border:1px solid var(--line);background:#fff;color:var(--navy);
  box-shadow:0 1px 0 rgba(10,34,96,.03);transition:transform .12s ease,border-color .12s ease
}
.btn:hover{text-decoration:none;border-color:var(--teal);transform:translateY(-1px)}
.btn.primary{background:var(--navy);color:#fff;border-color:var(--navy)}
.btn.primary:hover{background:var(--navy2)}

.meta-row{display:flex;flex-wrap:wrap;gap:8px 22px;margin-top:20px;color:var(--mut);font-size:14.5px}
.meta-row .mono{color:var(--slate)}

/* ---------- Chips ---------- */
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{font-family:"IBM Plex Mono",monospace;font-size:12.5px;color:var(--slate);background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 12px}

/* ---------- Cards / grids ---------- */
.grid{display:grid;gap:18px}
.grid.two{grid-template-columns:1fr 1fr}
.grid.three{grid-template-columns:repeat(3,1fr)}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:22px;box-shadow:var(--shadow)}
.card h3{font-size:19px;margin-bottom:8px}
.card p{color:#33383f;margin-bottom:12px;font-size:15.5px}
.card .refs{display:flex;flex-wrap:wrap;gap:6px}

.tag{font-family:"IBM Plex Mono",monospace;font-size:11.5px;color:var(--blue);border:1px solid var(--line);border-radius:6px;padding:2px 7px;background:#fff}
.tag:hover{border-color:var(--blue);text-decoration:none}

/* ---------- Lists (bio/honors/service/news) ---------- */
.prose p{max-width:70ch}
.stack{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:14px}
.stack li{display:grid;grid-template-columns:96px 1fr;gap:16px;align-items:baseline}
.stack .when{font-family:"IBM Plex Mono",monospace;font-size:12.5px;color:var(--teal);letter-spacing:.02em;padding-top:2px}
.stack .what{color:#2c313a}
.stack.plain li{grid-template-columns:1fr}
.stack.plain li::before{content:"";display:inline-block;width:7px;height:7px;border-radius:2px;background:var(--trace);margin-right:10px;transform:translateY(-2px)}

/* ---------- Publications ---------- */
.pub-controls{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}
.filter{font-family:"IBM Plex Mono",monospace;font-size:12.5px;color:var(--slate);background:#fff;border:1px solid var(--line);border-radius:999px;padding:7px 14px;cursor:pointer}
.filter[aria-pressed="true"]{background:var(--navy);color:#fff;border-color:var(--navy)}
.pub-group{margin-bottom:34px}
.pub-group h3{font-size:15px;font-family:"IBM Plex Mono",monospace;letter-spacing:.06em;text-transform:uppercase;color:var(--slate);border-bottom:1px solid var(--line);padding-bottom:8px;margin-bottom:6px}
.pub{display:grid;grid-template-columns:60px 1fr;gap:16px;padding:15px 0;border-bottom:1px solid var(--line2)}
.pub .pid{font-family:"IBM Plex Mono",monospace;font-size:12px;color:#fff;background:var(--slate);border-radius:6px;height:fit-content;padding:3px 0;text-align:center}
.pub .pid.j{background:var(--navy)} .pub .pid.c{background:var(--teal)} .pub .pid.b{background:var(--copper)} .pub .pid.p{background:var(--slate)} .pub .pid.t{background:#556}
.pub .ptitle{font-weight:500;color:var(--ink)}
.pub .pauth{color:var(--mut);font-size:14.5px;margin-top:3px}
.pub .pauth b{color:var(--ink);font-weight:600}
.pub .pven{color:var(--slate);font-size:14.5px;margin-top:3px}
.pub .pven .yr{font-family:"IBM Plex Mono",monospace;color:var(--mut)}
.pub .award{display:inline-block;margin-top:6px;font-family:"IBM Plex Mono",monospace;font-size:11.5px;color:var(--copper);border:1px solid #e7d6c6;background:#fbf4ec;border-radius:6px;padding:2px 8px}

/* ---------- People ---------- */
.people{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.person{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:16px 18px}
.person.with-photo{display:flex;gap:14px;align-items:flex-start}
.person .avatar,.person .avatar-fallback{width:58px;height:58px;border-radius:50%;flex-shrink:0}
.person .avatar{object-fit:cover;background:#fff;border:1px solid var(--line)}
.person .avatar-fallback{display:grid;place-items:center;background:radial-gradient(120% 120% at 20% 0%,#12306e,#0a1f52);color:#fff;font-family:"Space Grotesk",sans-serif;font-weight:600;font-size:17px;letter-spacing:.02em}
.person .pinfo{flex:1;min-width:0}
.person .pn{font-weight:600;color:var(--navy)}
.person .pd{font-family:"IBM Plex Mono",monospace;font-size:12px;color:var(--teal);margin-top:2px}
.person .pt{color:var(--mut);font-size:14.5px;margin-top:6px}
.callout{margin-top:22px;background:linear-gradient(180deg,#fff, #fbfcfa);border:1px solid var(--line);border-left:3px solid transparent;border-image:var(--trace) 1;border-radius:var(--r);padding:22px 24px}
.callout p{margin:0;color:#2c313a}

/* ---------- Sponsors ---------- */
.sp-row{display:flex;flex-wrap:wrap;gap:12px;align-items:stretch}
.sp{display:grid;place-items:center;min-width:150px;height:78px;padding:10px 20px;background:#fff;border:1px solid var(--line);border-radius:var(--r);text-decoration:none;transition:transform .12s ease,border-color .12s ease}
.sp:hover{text-decoration:none;border-color:var(--teal);transform:translateY(-1px)}
.sp img{max-height:50px;max-width:180px;object-fit:contain;filter:grayscale(1);opacity:.78;transition:filter .12s ease,opacity .12s ease}
.sp:hover img{filter:none;opacity:1}
.sp-txt{font-family:"Space Grotesk",sans-serif;font-weight:600;font-size:13.5px;letter-spacing:.06em;color:var(--slate);text-transform:uppercase;text-align:center;line-height:1.2}
.sp:hover .sp-txt{color:var(--navy)}

/* ---------- Footer ---------- */
.site-footer{background:var(--navy);color:#c9d4ec;margin-top:24px}
.site-footer .wrap{padding:40px 24px 34px;display:grid;grid-template-columns:1fr auto;gap:30px;align-items:center}
.site-footer img{height:96px;filter:drop-shadow(0 2px 10px rgba(0,0,0,.25))}
.site-footer h4{color:#fff;font-size:16px;margin-bottom:8px}
.site-footer a{color:#fff;text-decoration:underline;text-decoration-color:rgba(255,255,255,.35)}
.site-footer .fmeta{font-size:14px;line-height:1.7;color:#b6c3e0}
.site-footer .fmono{font-family:"IBM Plex Mono",monospace;font-size:12px;color:#8fa3cf;margin-top:14px}

/* ---------- Responsive ---------- */
@media (max-width:820px){
  .hero-grid{grid-template-columns:1fr;gap:26px}
  .hero-side{order:-1;flex-direction:row;flex-wrap:wrap;justify-content:flex-start}
  .portrait,.monogram{width:150px;height:150px}
  .grid.two,.grid.three,.people{grid-template-columns:1fr}
  .nav-links{display:none;position:absolute;left:0;right:0;top:68px;background:var(--paper);border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:8px 16px 14px}
  .nav-links.open{display:flex}
  .nav-links a{padding:11px 12px}
  .nav-toggle{display:inline-flex}
  .stack li{grid-template-columns:74px 1fr;gap:12px}
  .site-footer .wrap{grid-template-columns:1fr}
}

@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
:focus-visible{outline:2.5px solid var(--teal);outline-offset:2px;border-radius:4px}