/* =========================================================
   Dr. Venkatesh Meda — Research Group
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Figtree:wght@400;500;600;700&family=Spectral:wght@400;500;600;700&display=swap');

:root{
  /* Brand */
  --green:#006E3C;          /* USask green */
  --green-700:#055231;
  --green-900:#06311F;    
  --green-050:#EEF4EF;     

  /* Accent — prairie wheat/grain */
  --gold:#C2872B;
  --gold-soft:#E4C480;

  /* Neutrals (warm) */
  --ink:#16211B;
  --muted:#586B60;
  --paper:#FBFAF6;          /* page background */
  --surface:#FFFFFF;        /* cards / inputs */
  --line:#E6E3D9;           /* hairline border */

  /* Effects */
  --shadow-sm:0 2px 10px -6px rgba(6,49,31,.30);
  --shadow:0 22px 55px -28px rgba(6,49,31,.40);
  --radius:14px;
  --radius-sm:10px;
  --maxw:1180px;

  --font-display:'Spectral', Georgia, 'Times New Roman', serif;
  --font-sans:'Figtree', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.72;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

img{max-width:100%}

.container{
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 28px;
}

/* ---------- Typography ---------- */
h1,h2,h3{
  font-family:var(--font-display);
  color:var(--ink);
  font-weight:600;
  letter-spacing:-.01em;
}
h1{
  font-size:clamp(38px,6vw,66px);
  line-height:1.05;
  margin:0;
  font-weight:600;
}
h2{
  font-size:clamp(26px,3.4vw,38px);
  line-height:1.15;
  margin:0 0 4px;
}
h3{font-size:21px;margin:0 0 6px;line-height:1.25}
p{margin:0 0 18px}
main p{max-width:74ch}

.lead{color:var(--muted);font-size:1.1rem}

/* Eyebrow label */
.eyebrow{
  font-family:var(--font-sans);
  font-size:13px;
  font-weight:600;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--gold);
  margin:0 0 14px;
}

/* Section heading rule */
hr.sep{
  border:0;
  height:2px;
  width:54px;
  background:var(--gold);
  margin:10px 0 28px;
  border-radius:2px;
}

/* ---------- Header / Nav ---------- */
header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--green);
  color:#fff;
  transition:box-shadow .25s ease, background .25s ease;
}
header.scrolled{
  box-shadow:0 10px 30px -18px rgba(0,0,0,.55);
  background:var(--green-700);
}
.nav{
  display:flex;
  align-items:center;
  gap:18px;
  height:74px;
}
.brand{
  display:inline-flex;
  align-items:center;
  color:#fff;
  text-decoration:none;
  font-family:var(--font-display);
  font-weight:600;
  font-size:24px;
  letter-spacing:.2px;
  margin-right:auto;
}
.brand:hover{opacity:.94}

.nav-toggle{
  display:none;
  background:none;
  border:1px solid rgba(255,255,255,.35);
  border-radius:8px;
  color:#fff;
  font-size:20px;
  line-height:1;
  padding:8px 11px;
  cursor:pointer;
}

header nav ul{
  display:flex;
  gap:28px;
  list-style:none;
  margin:0;padding:0;
}
header nav a{
  position:relative;
  color:#fff;
  text-decoration:none;
  font-size:18px;
  font-weight:500;
  padding:6px 1px;
  opacity:.92;
}
header nav a:hover{opacity:1}
header nav a::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-2px;
  height:2px;
  background:var(--gold-soft);
  transform:scaleX(0);
  transform-origin:right;
  transition:transform .26s ease;
}
header nav a:hover::after,
header nav a:focus-visible::after,
header nav a.active::after{
  transform:scaleX(1);
  transform-origin:left;
}
header nav a.active{opacity:1}
header nav a:focus-visible{outline:2px solid var(--gold-soft);outline-offset:3px;border-radius:3px}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  isolation:isolate;
  color:#fff;
  background:
    radial-gradient(120% 140% at 85% 0%, rgba(194,135,43,.22), transparent 55%),
    linear-gradient(155deg, var(--green-900) 0%, var(--green-700) 70%, #064b2b 100%);
  overflow:hidden;
}
.hero::before{   /* seed-dot texture */
  content:"";
  position:absolute;inset:0;z-index:-1;
  background-image:radial-gradient(circle at 1px 1px, rgba(255,255,255,.10) 1px, transparent 0);
  background-size:24px 24px;
  opacity:.6;
  -webkit-mask-image:linear-gradient(to bottom, #000 0%, transparent 90%);
          mask-image:linear-gradient(to bottom, #000 0%, transparent 90%);
}
.hero .inner{
  position:relative;
  padding:74px 0 64px;
}
.hero .eyebrow{color:var(--gold-soft)}
.hero h1{color:#fff}
.hero .hero-sub{
  margin:18px 0 0;
  max-width:60ch;
  color:rgba(255,255,255,.86);
  font-size:1.12rem;
  line-height:1.6;
}
.hero .accent-rule{
  width:64px;height:3px;border-radius:3px;
  background:var(--gold);
  margin-bottom:26px;
}

/* ---------- Layout sections ---------- */
main.container{padding-top:8px;padding-bottom:8px}
section{padding:46px 0}

.figure{
  margin:34px 0 8px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow:var(--shadow);
  background:var(--surface);
}
.figure img{width:100%;display:block}

/* ---------- Home: profile block ---------- */
.profile{
  display:grid;
  grid-template-columns:320px 1fr;
  gap:46px;
  align-items:start;
  padding-top:52px;
}
.portrait{
  position:relative;
  border-radius:var(--radius);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow);
  background:var(--surface);
}
.portrait img{width:100%;display:block}
.profile-body p:first-child{font-size:1.12rem;color:var(--ink)}

/* Big quick links (home) */
.biglinks{
  margin:18px 0 8px;
  border-top:1px solid var(--line);
}
.biglinks a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:24px 4px;
  border-bottom:1px solid var(--line);
  text-decoration:none;
  color:var(--ink);
  font-family:var(--font-display);
  font-size:clamp(24px,3.4vw,38px);
  font-weight:500;
  transition:color .2s ease, padding-left .25s ease;
}
.biglinks a::after{
  content:"→";
  font-family:var(--font-sans);
  color:var(--gold);
  transform:translateX(0);
  transition:transform .25s ease;
}
.biglinks a:hover{color:var(--green);padding-left:12px}
.biglinks a:hover::after{transform:translateX(8px)}

/* ---------- Cards (research areas) ---------- */
.grid{display:grid;gap:24px}
.grid.cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid.cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}

.card{
  position:relative;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:24px 22px 22px;
  box-shadow:var(--shadow-sm);
  overflow:hidden;
  transition:transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}
.card::before{
  content:"";
  position:absolute;left:0;top:0;
  height:3px;width:100%;
  background:linear-gradient(90deg, var(--gold), var(--gold-soft));
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .28s ease;
}
.card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow);
  border-color:#d8d4c6;
}
.card:hover::before{transform:scaleX(1)}
.card h3{font-family:var(--font-display)}
.card p{color:var(--muted);margin:0;font-size:.98rem}

a.inline-links,
a.inline-link{
  color:var(--ink);
  text-decoration:none;
  background-image:linear-gradient(var(--gold),var(--gold));
  background-size:0% 2px;
  background-repeat:no-repeat;
  background-position:left bottom;
  transition:background-size .25s ease, color .2s ease;
  padding-bottom:2px;
}
a.inline-links:hover,
a.inline-link:hover{color:var(--green);background-size:100% 2px}

.disabled-link{
  color:#9aa69e;
  cursor:not-allowed;
}
.disabled-link::after{
  content:"Coming soon";
  display:inline-block;
  margin-left:8px;
  font-family:var(--font-sans);
  font-size:11px;
  font-weight:600;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--gold);
  background:var(--green-050);
  border:1px solid var(--line);
  border-radius:999px;
  padding:2px 8px;
  vertical-align:middle;
}

/* ---------- Team ---------- */
.people{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(210px,1fr));
  gap:26px;
}
.person{
  text-align:left;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:0 0 18px;
  box-shadow:var(--shadow-sm);
  overflow:hidden;
  transition:transform .22s ease, box-shadow .22s ease;
}
.person:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.person img{
  width:100%;
  aspect-ratio:1/1;
  height:auto;
  object-fit:cover;
  object-position:top;
  display:block;
  border-bottom:1px solid var(--line);
}
.person .name{
  font-family:var(--font-display);
  font-weight:600;
  font-size:18px;
  margin:14px 18px 2px;
}
.person .role{color:var(--green);font-weight:500;margin:0 18px;font-size:.95rem}
.person .dept{color:var(--muted);font-size:.85rem;margin:4px 18px 0}

/* ---------- Publications ---------- */
.pub-list{
  list-style:none;
  counter-reset:pub;
  margin:0;padding:0;
}
.pub-list li{
  counter-increment:pub;
  position:relative;
  padding:18px 18px 18px 64px;
  border-bottom:1px solid var(--line);
}
.pub-list li::before{
  content:counter(pub,decimal-leading-zero);
  position:absolute;left:0;top:16px;
  font-family:var(--font-display);
  font-size:20px;
  font-weight:600;
  color:var(--gold);
}
.pub-list li:last-child{border-bottom:0}

/* ---------- Contact form ---------- */
.form-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:20px;
  margin-bottom:20px;
}
.field{margin-bottom:20px}
.field label,
.form-grid label{
  display:block;
  font-size:13px;
  font-weight:600;
  letter-spacing:.04em;
  text-transform:uppercase;
  color:var(--muted);
  margin-bottom:8px;
}
.input,
.textarea{
  width:100%;
  font-family:var(--font-sans);
  font-size:16px;
  color:var(--ink);
  background:var(--surface);
  padding:13px 15px;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  transition:border-color .2s ease, box-shadow .2s ease;
}
.textarea{min-height:170px;resize:vertical}
.input:focus,
.textarea:focus{
  outline:none;
  border-color:var(--green);
  box-shadow:0 0 0 3px rgba(0,110,60,.14);
}
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:var(--green);
  color:#fff;
  font-family:var(--font-sans);
  font-weight:600;
  font-size:16px;
  padding:13px 28px;
  border:none;
  border-radius:var(--radius-sm);
  cursor:pointer;
  transition:background .2s ease, transform .15s ease;
}
.btn:hover{background:var(--green-700);transform:translateY(-1px)}

/* Contact header detail block (inside hero) */
.contact-name{
  font-family:var(--font-display);
  font-size:22px;font-weight:600;
  margin:22px 0 8px;
  color:#fff;
}
.contact-info p{margin:3px 0;color:rgba(255,255,255,.88)}
.contact-info strong{color:#fff}

/* Booking embed (kept for later use) */
.booking-embed{
  border:1px solid var(--line);
  box-shadow:var(--shadow);
  background:var(--surface);
  border-radius:var(--radius);
  overflow:hidden;
}
.booking-embed iframe{width:100%;height:820px;border:0;display:block}

/* ---------- Partners ---------- */
.partners{
  background:var(--green-050);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  padding:30px 0;
  margin-top:30px;
}
.partners .container{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  flex-wrap:wrap;
}
.partner-label{
  font-size:12px;font-weight:600;
  letter-spacing:.18em;text-transform:uppercase;
  color:var(--muted);
}
.partner-logos{
  display:flex;align-items:center;gap:34px;flex-wrap:wrap;
}
.partner-logos img{
  height:52px;width:auto;object-fit:contain;display:block;
}

/* ---------- Footer ---------- */
footer{
  background:var(--green-900);
  color:rgba(255,255,255,.78);
  padding:40px 0 36px;
}
footer .foot{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  flex-wrap:wrap;
}
footer .foot-brand{
  font-family:var(--font-display);
  font-size:19px;font-weight:600;color:#fff;
  text-decoration:none;
}
footer nav ul{display:flex;list-style:none;margin:0;padding:0;gap:22px;flex-wrap:wrap}
footer nav a{color:rgba(255,255,255,.8);text-decoration:none;font-size:14px}
footer nav a:hover{color:#fff}
footer nav a::after{display:none}
footer .small{font-size:13.5px;color:rgba(255,255,255,.6)}

/* ---------- Lightbox ---------- */
.lightbox{
  position:fixed;inset:0;display:none;place-items:center;
  background:rgba(6,49,31,.82);z-index:120;padding:20px;
}
.lightbox.open{display:grid}
.lightbox img{max-width:92vw;max-height:88vh;border-radius:var(--radius);background:#fff}
.lightbox .close{
  position:absolute;top:20px;right:24px;
  background:#fff;border:1px solid var(--line);
  border-radius:999px;padding:8px 14px;cursor:pointer;font-weight:600;
}

/* ---------- Reveal on scroll ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease, transform .6s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media (max-width:980px){
  .grid.cols-3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:820px){
  .profile{grid-template-columns:1fr;gap:26px}
  .portrait{max-width:340px;margin:0 auto}
}
/* Collapse the long nav into a menu earlier so it never crowds */
@media (max-width:1024px){
  .nav{height:64px}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center}

  header nav{
    position:absolute;
    top:64px;left:0;right:0;
    background:var(--green-900);
    border-top:1px solid rgba(255,255,255,.14);
    max-height:0;overflow:hidden;opacity:0;pointer-events:none;
    transition:max-height .25s ease, opacity .25s ease;
  }
  header nav.open{max-height:360px;opacity:1;pointer-events:auto}
  header nav ul{flex-direction:column;gap:0;padding:6px 0}
  header nav li{border-bottom:1px solid rgba(255,255,255,.10)}
  header nav li:last-child{border-bottom:0}
  header nav a{display:block;padding:14px 28px;font-size:17px}
  header nav a::after{display:none}
}
@media (max-width:760px){
  body{font-size:16px}
  .brand{font-size:21px}
  .hero .inner{padding:54px 28px 46px}
  section{padding:36px 0}
  .form-grid{grid-template-columns:1fr;gap:16px}
  .partners .container{flex-direction:column;align-items:flex-start;gap:18px}
  footer .foot{flex-direction:column;align-items:flex-start;gap:14px}
}
@media (max-width:560px){
  .grid.cols-3,.grid.cols-2{grid-template-columns:1fr}
  .people{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:18px}
}

/* ---------- Accessibility ---------- */
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
}