/* ============================================================
   VILO RESEARCH GROUP — Main Stylesheet
   ============================================================ */

:root {
  --navy:       #0a1f3c;
  --navy-mid:   #112b52;
  --blue:       #1a4a8a;
  --teal:       #0d8c7a;
  --teal-light: #12b09a;
  --gold:       #c9a84c;
  --cream:      #f7f4ef;
  --white:      #ffffff;
  --gray-light: #e8e4dc;
  --gray:       #8a8278;
  --text:       #2c2720;
  --shadow:     0 20px 60px rgba(10,31,60,.12);
  --shadow-soft:0 12px 36px rgba(10,31,60,.08);
  --radius-card:22px;
  --radius-lg:  28px;
  --radius-pill:999px;
}

/* ── Reset ── */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{
  font-family:"DM Sans",sans-serif;
  color:var(--text);
  background:var(--cream);
  overflow-x:hidden;
  line-height:1.65;
}
img{max-width:100%;display:block}
a{text-decoration:none}

/* Custom scrollbar */
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:var(--navy)}
::-webkit-scrollbar-thumb{background:var(--teal);border-radius:3px}

/* Skip link */
.skip-link{
  position:absolute;left:-999px;top:auto;width:1px;height:1px;overflow:hidden;
}
.skip-link:focus{
  left:1rem;top:1rem;width:auto;height:auto;
  background:var(--teal);color:#fff;padding:.5rem 1rem;border-radius:8px;z-index:9999;
}

/* ── Layout ── */
.container{max-width:1300px;margin:0 auto;padding:0 2rem}
.section{padding:6rem 0;position:relative}
.section-header{max-width:860px;margin-bottom:3rem}

/* ── Typography helpers ── */
.eyebrow{
  display:inline-flex;align-items:center;gap:.5rem;
  font-size:.78rem;letter-spacing:.18em;text-transform:uppercase;
  color:var(--teal);font-weight:700;margin-bottom:1rem;
}
.eyebrow::before{content:"";width:28px;height:1px;background:rgba(13,140,122,.45)}
h1,h2,h3,h4{line-height:1.1}
.section-title{
  font-family:"DM Serif Display",serif;
  font-size:clamp(1.9rem,3.8vw,3.1rem);
  color:var(--navy);margin-bottom:1rem;
}
.section-subtitle{font-size:1.02rem;color:rgba(44,39,32,.82);max-width:740px}
.mt-2{margin-top:2rem}

/* ── NAV ── */
.nav{
  position:fixed;top:0;left:0;width:100%;z-index:1000;
  padding:1.2rem 0;transition:all .35s ease;
}
.nav.scrolled{
  background:rgba(10,31,60,.97);backdrop-filter:blur(20px);
  padding:.85rem 0;box-shadow:0 4px 40px rgba(0,0,0,.25);
}
.nav-inner{
  max-width:1300px;margin:0 auto;padding:0 2rem;
  display:flex;justify-content:space-between;align-items:center;gap:2rem;
}
.logo{display:flex;align-items:center;gap:.9rem;color:#fff}
.logo img{height:46px;width:auto;object-fit:contain}
.logo-text{display:flex;flex-direction:column;line-height:1.05}
.logo-text strong{font-family:"DM Serif Display",serif;font-size:1.06rem;font-weight:400;letter-spacing:.02em}
.logo-text span{font-size:.6rem;letter-spacing:.18em;text-transform:uppercase;color:var(--teal-light);font-weight:700}
.nav-links{display:flex;list-style:none;align-items:center;gap:2rem}
.nav-links a{
  color:rgba(255,255,255,.8);font-size:.9rem;font-weight:500;
  letter-spacing:.03em;position:relative;transition:color .25s;
}
.nav-links a:not(.nav-btn)::after{
  content:"";position:absolute;left:0;bottom:-5px;
  width:0;height:1.5px;background:var(--teal-light);transition:width .25s;
}
.nav-links a:hover{color:#fff}
.nav-links a:not(.nav-btn):hover::after{width:100%}
.nav-btn{
  background:var(--teal);color:#fff!important;
  padding:.6rem 1.3rem;border-radius:var(--radius-pill);
  font-weight:700!important;transition:all .25s!important;
  box-shadow:0 10px 24px rgba(13,140,122,.22);
}
.nav-btn:hover{background:var(--teal-light)!important;transform:translateY(-1px)}
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:4px;background:none;border:none}
.hamburger span{display:block;width:24px;height:2px;background:#fff;border-radius:2px;transition:all .3s}
.hamburger.open span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}
.mobile-nav{
  display:none;position:fixed;inset:0;background:var(--navy);z-index:999;
  flex-direction:column;align-items:center;justify-content:center;gap:2.2rem;padding:2rem;
}
.mobile-nav.open{display:flex}
.mobile-nav a{color:#fff;font-family:"DM Serif Display",serif;font-size:1.4rem}
.mobile-nav a.cta{
  font-family:"DM Sans",sans-serif;font-size:1rem;
  background:var(--teal);padding:.8rem 1.5rem;border-radius:var(--radius-pill);font-weight:700;
}

/* ── HERO ── */
.hero{
  min-height:100vh;background:var(--navy);position:relative;
  overflow:hidden;display:flex;align-items:center;
  padding:8rem 2rem 4rem;
}
.hero-bg{
  position:absolute;inset:0;
  background:
    radial-gradient(ellipse 70% 60% at 80% 50%,rgba(13,140,122,.13) 0%,transparent 60%),
    radial-gradient(ellipse 50% 80% at 10% 80%,rgba(26,74,138,.32) 0%,transparent 60%);
}
.hero-grid{
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.02) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.02) 1px,transparent 1px);
  background-size:60px 60px;
}
.hero-network{position:absolute;inset:0;pointer-events:none;opacity:.85}
.hero-network svg{width:100%;height:100%}
.network-line{
  fill:none;stroke:rgba(103,232,249,.2);stroke-width:1.3;stroke-linecap:round;
  stroke-dasharray:10 18;animation:networkFlow 18s linear infinite;
}
.network-line.alt{stroke:rgba(45,212,191,.15);stroke-dasharray:6 20;animation-duration:24s}
.network-line.gold{stroke:rgba(201,168,76,.13);stroke-dasharray:8 22;animation-duration:28s}
.network-node{
  fill:rgba(255,255,255,.88);filter:drop-shadow(0 0 8px rgba(103,232,249,.4));
  animation:nodePulse 5s ease-in-out infinite;transform-origin:center;
}
.network-node.teal{fill:rgba(45,212,191,.92)}
.network-node.gold{fill:rgba(201,168,76,.88);filter:drop-shadow(0 0 8px rgba(201,168,76,.25))}
.network-ring{fill:none;stroke:rgba(103,232,249,.1);stroke-width:1}
.network-blur{fill:url(#networkGlow);opacity:.45;animation:glowDrift 14s ease-in-out infinite}
.orb{position:absolute;border-radius:50%;filter:blur(80px);animation:orbFloat 9s ease-in-out infinite;pointer-events:none}
.orb-1{width:480px;height:480px;background:rgba(13,140,122,.07);top:-100px;right:-100px}
.orb-2{width:320px;height:320px;background:rgba(26,74,138,.11);bottom:-50px;left:5%;animation-delay:3s}
.orb-3{width:220px;height:220px;background:rgba(201,168,76,.05);top:40%;right:20%;animation-delay:5s}
@keyframes orbFloat{0%,100%{transform:translateY(0) scale(1)}50%{transform:translateY(-36px) scale(1.04)}}
@keyframes networkFlow{from{stroke-dashoffset:0}to{stroke-dashoffset:-240}}
@keyframes nodePulse{0%,100%{transform:scale(1);opacity:.88}50%{transform:scale(1.28);opacity:1}}
@keyframes glowDrift{0%,100%{transform:translate(0,0)}50%{transform:translate(16px,-10px)}}

.hero-inner{
  max-width:1300px;margin:0 auto;width:100%;
  display:grid;grid-template-columns:1.15fr .85fr;gap:5rem;
  align-items:center;position:relative;z-index:2;
}
.hero-badge{
  display:inline-flex;align-items:center;gap:.5rem;
  padding:.46rem .88rem;border-radius:var(--radius-pill);
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.11);
  color:rgba(255,255,255,.84);font-size:.8rem;letter-spacing:.12em;
  text-transform:uppercase;font-weight:700;margin-bottom:1.2rem;backdrop-filter:blur(12px);
}
.hero-badge i{color:var(--teal-light)}
.hero h1{
  font-family:"DM Serif Display",serif;color:#fff;
  font-size:clamp(2.8rem,5.6vw,5.2rem);line-height:.98;
  margin-bottom:1.3rem;letter-spacing:-.02em;
}
.hero p{color:rgba(255,255,255,.83);font-size:1.06rem;max-width:700px;margin-bottom:1.2rem}
.hero-support{color:rgba(255,255,255,.68);font-size:.96rem;margin-bottom:2rem;line-height:1.6}
.hero-cta{display:flex;flex-wrap:wrap;gap:1rem;margin-bottom:2.2rem}
.hero-proof{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem;max-width:740px}
.proof-item{
  padding:1rem;border-radius:16px;
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.09);
  color:#fff;backdrop-filter:blur(10px);
}
.proof-item strong{display:block;font-size:1.35rem;font-weight:700;margin-bottom:.2rem;color:var(--teal-light)}
.proof-item span{display:block;font-size:.86rem;color:rgba(255,255,255,.68)}

.hero-card{
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.11);
  border-radius:var(--radius-lg);padding:2rem;backdrop-filter:blur(16px);
  box-shadow:0 28px 70px rgba(0,0,0,.16);color:#fff;
  justify-self:end;max-width:440px;width:100%;position:relative;
}
.hero-card::before{
  content:"";position:absolute;inset:0;border-radius:var(--radius-lg);padding:1px;
  background:linear-gradient(135deg,rgba(45,212,191,.3),rgba(255,255,255,.03));
  -webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none;
}
.hero-card .card-label{font-size:.76rem;letter-spacing:.17em;text-transform:uppercase;color:var(--teal-light);font-weight:700;margin-bottom:.85rem}
.hero-card h3{font-family:"DM Serif Display",serif;font-size:1.9rem;margin-bottom:1rem;line-height:1.04}
.hero-card p{margin-bottom:1.2rem;color:rgba(255,255,255,.8);font-size:.98rem}
.hero-card ul{list-style:none;display:grid;gap:.8rem}
.hero-card li{display:flex;gap:.8rem;align-items:flex-start;color:rgba(255,255,255,.82);font-size:.94rem}
.hero-card li i{color:var(--teal-light);margin-top:.2rem;flex-shrink:0}

/* ── BUTTONS ── */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  gap:.5rem;padding:.9rem 1.4rem;border-radius:var(--radius-pill);
  border:1px solid transparent;font-weight:700;letter-spacing:.02em;
  transition:all .25s;cursor:pointer;font-family:inherit;font-size:inherit;
}
.btn-primary{background:var(--teal);color:#fff;box-shadow:0 12px 26px rgba(13,140,122,.22)}
.btn-primary:hover{background:var(--teal-light);transform:translateY(-1px)}
.btn-secondary{background:rgba(255,255,255,.07);color:#fff;border-color:rgba(255,255,255,.13);backdrop-filter:blur(12px)}
.btn-secondary:hover{background:rgba(255,255,255,.11);transform:translateY(-1px)}
.btn-outline{background:#fff;color:var(--navy);border-color:rgba(10,31,60,.12)}
.btn-outline:hover{background:#f8f8f8;transform:translateY(-1px)}

/* ── STATS BAR ── */
.stats-bar{margin-top:-2.5rem;position:relative;z-index:3}
.stats-wrap{
  background:var(--white);border-radius:22px;box-shadow:var(--shadow);
  padding:1.4rem;display:grid;grid-template-columns:repeat(6,1fr);gap:1rem;
}
.stat-box{padding:.9rem;border-radius:16px;background:linear-gradient(180deg,rgba(10,31,60,.02),rgba(10,31,60,.05));text-align:center}
.stat-box strong{display:block;font-size:1.7rem;color:var(--navy);margin-bottom:.18rem}
.stat-box span{font-size:.85rem;color:rgba(44,39,32,.68);display:block;line-height:1.35}

/* ── GRIDS ── */
.grid-2{display:grid;grid-template-columns:1.05fr .95fr;gap:3rem;align-items:center}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.5rem}
.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1.3rem}

/* ── CARDS ── */
.card{
  background:var(--white);border-radius:var(--radius-card);padding:1.6rem;
  box-shadow:var(--shadow-soft);border:1px solid rgba(10,31,60,.05);
  transition:transform .25s,box-shadow .25s;height:100%;
}
.card:hover{transform:translateY(-4px);box-shadow:0 22px 52px rgba(10,31,60,.13)}
.card-icon{
  width:50px;height:50px;border-radius:14px;
  background:linear-gradient(135deg,rgba(13,140,122,.1),rgba(18,176,154,.18));
  color:var(--teal);display:inline-flex;align-items:center;justify-content:center;
  font-size:1.15rem;margin-bottom:1rem;
}
.card h3,.card h4{color:var(--navy);font-size:1.2rem;margin-bottom:.75rem}
.card p{color:rgba(44,39,32,.76);font-size:.96rem}

/* ── MISC COMPONENTS ── */
.list-clean{list-style:none;display:grid;gap:.75rem;margin-top:1rem}
.list-clean li{display:flex;gap:.6rem;align-items:flex-start;color:rgba(44,39,32,.8);font-size:.95rem}
.list-clean li i{color:var(--teal);margin-top:.22rem;flex-shrink:0}

.about-panel{
  background:linear-gradient(180deg,#fff 0%,#faf7f2 100%);
  border-radius:var(--radius-lg);padding:2rem;
  box-shadow:var(--shadow-soft);border:1px solid rgba(10,31,60,.06);
}
.feature-stack{display:grid;gap:.9rem;margin-top:1.5rem}
.feature-item{
  padding:1.05rem 1.15rem;border-radius:16px;
  background:rgba(10,31,60,.04);border:1px solid rgba(10,31,60,.05);
}
.feature-item h4{color:var(--navy);margin-bottom:.4rem;font-size:.97rem}
.feature-item p{font-size:.92rem;color:rgba(44,39,32,.74)}

/* ── DARK SECTION ── */
.section-dark{background:linear-gradient(180deg,#0c2343 0%,#081628 100%);color:#fff;overflow:hidden}
.section-dark .section-title{color:#fff}
.section-dark .section-subtitle{color:rgba(255,255,255,.75)}
.section-dark .card{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.1);box-shadow:none;color:#fff;backdrop-filter:blur(10px)}
.section-dark .card h3,.section-dark .card h4{color:#fff}
.section-dark .card p{color:rgba(255,255,255,.78)}
.section-dark .card-icon{background:rgba(45,212,191,.11);color:var(--teal-light)}

/* ── STUDY CARDS ── */
.study-tag{
  display:inline-flex;align-items:center;gap:.42rem;
  padding:.38rem .66rem;border-radius:var(--radius-pill);
  background:rgba(13,140,122,.09);color:var(--teal);
  font-size:.76rem;font-weight:700;letter-spacing:.04em;margin-bottom:1rem;text-transform:uppercase;
}
.study-meta{display:flex;flex-wrap:wrap;gap:.65rem;margin-top:1rem}
.study-meta span{
  display:inline-flex;align-items:center;gap:.4rem;
  font-size:.84rem;color:rgba(44,39,32,.7);
  background:rgba(10,31,60,.04);padding:.42rem .68rem;border-radius:var(--radius-pill);
}

/* ── PARTNERS ── */
.partner-strip{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.4rem}

/* ── INVESTIGATORS ── */
.investigator-group{display:grid;gap:1rem}
.investigator-group h4{color:var(--navy);font-size:.9rem;text-transform:uppercase;letter-spacing:.08em;margin-bottom:.4rem}
.investigator-list{list-style:none;display:grid;gap:.75rem}
.investigator-list li{
  padding:.88rem 1rem;border-radius:14px;
  background:rgba(10,31,60,.04);border:1px solid rgba(10,31,60,.06);
  font-weight:600;color:var(--navy);font-size:.97rem;
}

/* ── TEAM ── */
.team-card{text-align:center}
.team-photo{
  width:100%;aspect-ratio:1/1;border-radius:var(--radius-card);
  background:linear-gradient(180deg,rgba(10,31,60,.06),rgba(10,31,60,.11));
  margin-bottom:1rem;display:flex;align-items:center;justify-content:center;
  color:var(--navy);font-size:2rem;
}
.team-card h4{font-size:1.05rem;margin-bottom:.28rem}
.team-role{color:var(--teal);font-size:.84rem;letter-spacing:.08em;text-transform:uppercase;font-weight:700;margin-bottom:.75rem}

/* ── FACILITY ── */
.facility-badge{
  display:inline-flex;padding:.38rem .66rem;border-radius:var(--radius-pill);
  background:rgba(201,168,76,.11);color:#a48018;
  font-size:.76rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase;margin-bottom:1rem;
}

/* ── CONTACT ── */
.contact-wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:2rem;align-items:stretch}
.contact-panel{background:#fff;border-radius:var(--radius-lg);padding:2rem;box-shadow:var(--shadow);border:1px solid rgba(10,31,60,.06)}
.contact-info{
  background:linear-gradient(180deg,#0d2342 0%,var(--navy) 100%);
  color:#fff;border-radius:var(--radius-lg);padding:2rem;box-shadow:var(--shadow);
  position:relative;overflow:hidden;
}
.contact-info::after{
  content:"";position:absolute;width:240px;height:240px;border-radius:50%;
  background:rgba(45,212,191,.08);top:-60px;right:-60px;filter:blur(10px);
}
.contact-info h3{font-family:"DM Serif Display",serif;font-size:1.9rem;margin-bottom:1rem;position:relative;z-index:1}
.contact-info p{color:rgba(255,255,255,.78);margin-bottom:1.2rem;position:relative;z-index:1}
.contact-list{list-style:none;display:grid;gap:.95rem;position:relative;z-index:1}
.contact-list li{display:flex;gap:.75rem;align-items:flex-start;color:rgba(255,255,255,.88)}
.contact-list i{color:var(--teal-light);margin-top:.22rem;flex-shrink:0}

/* ── FORM ── */
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem}
.form-field{display:flex;flex-direction:column;gap:.42rem}
.form-field.full{grid-column:span 2}
.form-field label{font-size:.86rem;font-weight:700;color:var(--navy)}
.form-field input,.form-field select,.form-field textarea{
  width:100%;border:1.5px solid rgba(10,31,60,.11);border-radius:12px;
  padding:.9rem 1rem;font:inherit;background:#fff;color:var(--text);
  transition:border-color .2s,box-shadow .2s;
}
.form-field input:focus,.form-field select:focus,.form-field textarea:focus{
  outline:none;border-color:var(--teal);box-shadow:0 0 0 4px rgba(13,140,122,.1);
}
.form-field textarea{min-height:130px;resize:vertical}
.field-error{font-size:.82rem;color:#dc3545;margin-top:.2rem;display:none}
.form-field.invalid input,.form-field.invalid select,.form-field.invalid textarea{border-color:#dc3545}
.form-field.invalid .field-error{display:block}

/* ── CTA BAND ── */
.cta-band{
  background:linear-gradient(135deg,var(--navy) 0%,var(--navy-mid) 100%);
  color:#fff;border-radius:30px;padding:2.2rem;
  display:grid;grid-template-columns:1.2fr auto;gap:1rem;align-items:center;box-shadow:var(--shadow);
}
.cta-band h3{font-family:"DM Serif Display",serif;font-size:1.9rem;margin-bottom:.55rem}
.cta-band p{color:rgba(255,255,255,.76);max-width:740px}

/* ── INSIGHTS ── */
.insight-tag{color:var(--gray);font-weight:700;font-size:.74rem;text-transform:uppercase}
.insight-heading{margin:.75rem 0;font-family:"DM Serif Display",serif;font-size:1.35rem;color:var(--navy)}
.insight-link{
  color:var(--teal);font-weight:700;font-size:.82rem;text-transform:uppercase;
  margin-top:1.4rem;display:block;letter-spacing:1px;
}

/* ── FOOTER ── */
.footer{background:#071525;color:#fff;padding:4rem 0 2rem;position:relative;overflow:hidden}
.footer-grid{display:grid;grid-template-columns:1.2fr .9fr .9fr;gap:2rem;margin-bottom:2rem}
.footer h4{font-size:.97rem;margin-bottom:1rem;color:#fff}
.footer p,.footer li,.footer a{color:rgba(255,255,255,.7);font-size:.93rem}
.footer ul{list-style:none;display:grid;gap:.65rem}
.footer a:hover{color:#fff}
.footer-bottom{padding-top:1.4rem;border-top:1px solid rgba(255,255,255,.08);color:rgba(255,255,255,.6);font-size:.88rem}

/* ── FADE-IN ANIMATION ── */
.fade-in{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease}
.fade-in.visible{opacity:1;transform:translateY(0)}

/* ── RESPONSIVE ── */
@media(max-width:1100px){
  .hero-inner,.grid-2,.contact-wrap{grid-template-columns:1fr}
  .hero-card{justify-self:start;max-width:100%}
  .grid-4,.stats-wrap{grid-template-columns:repeat(3,minmax(0,1fr))}
  .partner-strip,.footer-grid{grid-template-columns:1fr}
  .cta-band{grid-template-columns:1fr}
}
@media(max-width:900px){
  .nav-links{display:none}
  .hamburger{display:flex}
  .grid-3,.grid-4,.partner-strip{grid-template-columns:1fr}
  .hero-proof,.stats-wrap{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:640px){
  .container,.nav-inner{padding:0 1.2rem}
  .section{padding:4.5rem 0}
  .hero{padding:7rem 1.2rem 3rem}
  .hero h1{font-size:2.4rem}
  .stats-wrap,.form-grid,.hero-proof{grid-template-columns:1fr}
  .form-field.full{grid-column:span 1}
  .section-title{font-size:1.85rem}
  .hero-card,.contact-panel,.contact-info,.about-panel,.cta-band{padding:1.35rem}
  .logo img{height:36px}
  .logo-text strong{font-size:.92rem}
}