:root{
    --navy:#0A2342;
    --royal:#1D4ED8;
    --royal-dark:#1741B5;
    --teal:#14B8A6;
    --bg:#F8FAFC;
    --surface:#FFFFFF;
    --text:#111827;
    --text-muted:#4B5563;
    --border:#E5E7EB;
    --success:#10B981;
    --shadow-sm:0 1px 2px rgba(10,35,66,0.06);
    --shadow-md:0 8px 24px rgba(10,35,66,0.08);
    --shadow-lg:0 20px 40px rgba(10,35,66,0.14);
    --radius:16px;
  }
  *{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--bg);
    color:var(--text);
    font-family:'Inter',sans-serif;
    font-size:17px;
    line-height:1.6;
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3,h4{
    font-family:'Poppins',sans-serif;
    margin:0;
    color:var(--navy);
    letter-spacing:-0.01em;
  }
  a{color:inherit;text-decoration:none;}
  img{max-width:100%;display:block;}
  .container{max-width:1280px;margin:0 auto;padding:0 24px;}
  @media(min-width:1024px){.container{padding:0 64px;}}
  section{padding:64px 0;}
  @media(min-width:1024px){section{padding:96px 0;}}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    background:rgba(20,184,166,0.12);
    color:#0F766E;
    font-size:13px;font-weight:600;
    padding:6px 14px;border-radius:999px;
    letter-spacing:0.02em;
    margin-bottom:20px;
  }
  .eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--teal);}
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    font-family:'Inter',sans-serif;font-weight:600;font-size:15px;
    padding:14px 28px;border-radius:10px;
    cursor:pointer;border:none;transition:all .2s cubic-bezier(.16,1,.3,1);
    letter-spacing:0.01em;
  }
  .btn-primary{background:var(--royal);color:#fff;box-shadow:var(--shadow-sm);}
  .btn-primary:hover{background:var(--royal-dark);box-shadow:var(--shadow-md);transform:translateY(-1px);}
  .btn-teal{background:var(--teal);color:#053b34;}
  .btn-teal:hover{background:#0d9488;transform:translateY(-1px);}
  .btn-outline{background:transparent;border:1.5px solid rgba(255,255,255,.5);color:#fff;}
  .btn-outline:hover{background:rgba(255,255,255,.1);border-color:#fff;}
  .btn-ghost{background:transparent;color:var(--navy);padding:14px 8px;}
  .btn-ghost:hover{color:var(--royal);}

  /* Header */
  header{
    position:sticky;top:0;z-index:100;
    height:80px;display:flex;align-items:center;
    transition:background .3s ease, box-shadow .3s ease, backdrop-filter .3s ease;
  }
  header.scrolled{
    background:rgba(255,255,255,0.75);
    backdrop-filter:blur(12px);
    -webkit-backdrop-filter:blur(12px);
    box-shadow:var(--shadow-sm);
  }
  .nav-wrap{display:flex;align-items:center;justify-content:space-between;width:100%;}
  .logo{display:flex;align-items:center;gap:10px;font-family:'Poppins',sans-serif;font-weight:700;font-size:19px;color:var(--navy);}
  .logo-mark{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--navy),var(--royal));display:flex;align-items:center;justify-content:center;}
  .logo-mark svg{width:18px;height:18px;}
  nav.primary-nav{display:none;gap:32px;align-items:center;}
  nav.primary-nav a{font-size:15px;font-weight:500;color:var(--text-muted);transition:color .15s;}
  nav.primary-nav a:hover{color:var(--navy);}
  .nav-actions{display:flex;align-items:center;gap:8px;}
  @media(min-width:1024px){
    nav.primary-nav{display:flex;}
    .nav-actions .btn-ghost{display:inline-flex;}
  }
  .hamburger{display:flex;width:44px;height:44px;align-items:center;justify-content:center;background:none;border:none;cursor:pointer;}
  @media(min-width:1024px){.hamburger{display:none;}}
  .hamburger span,.hamburger span::before,.hamburger span::after{content:"";display:block;width:22px;height:2px;background:var(--navy);position:relative;transition:.2s;}
  .hamburger span::before{position:absolute;top:-7px;}
  .hamburger span::after{position:absolute;top:7px;}

  .mobile-nav{
    position:fixed;inset:0;background:var(--navy);z-index:99;
    display:flex;flex-direction:column;padding:100px 32px 40px;gap:28px;
    transform:translateX(100%);transition:transform .35s cubic-bezier(.16,1,.3,1);
  }
  .mobile-nav.open{transform:translateX(0);}
  .mobile-nav a{font-family:'Poppins',sans-serif;font-size:24px;font-weight:500;color:#fff;}
  .mobile-nav .btn{width:100%;margin-top:8px;}

  /* Hero */
  .hero{
    position:relative;overflow:hidden;
    background:linear-gradient(135deg,var(--navy) 0%, #123a70 55%, var(--royal) 100%);
    padding:64px 0 96px;
    color:#fff;
  }
  @media(min-width:1024px){.hero{padding:110px 0 130px;}}
  .hero-grid{display:grid;gap:56px;align-items:center;}
  @media(min-width:1024px){.hero-grid{grid-template-columns:1.05fr 0.95fr;}}
  .hero h1{color:#fff;font-size:38px;line-height:1.12;font-weight:700;}
  @media(min-width:640px){.hero h1{font-size:48px;}}
  @media(min-width:1024px){.hero h1{font-size:56px;}}
  .hero p.sub{color:rgba(255,255,255,.78);font-size:18px;max-width:520px;margin:20px 0 32px;}
  .hero-ctas{display:flex;flex-wrap:wrap;gap:14px;}
  .hero-stats{
    margin-top:44px;display:flex;flex-wrap:wrap;gap:0;
    background:rgba(255,255,255,.08);
    border:1px solid rgba(255,255,255,.14);
    backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
    border-radius:16px;overflow:hidden;
  }
  .hero-stats .stat{flex:1 1 33%;padding:18px 20px;border-right:1px solid rgba(255,255,255,.12);min-width:140px;}
  .hero-stats .stat:last-child{border-right:none;}
  .hero-stats .stat b{display:block;font-family:'Poppins',sans-serif;font-size:22px;}
  .hero-stats .stat span{font-size:12.5px;color:rgba(255,255,255,.65);text-transform:uppercase;letter-spacing:.04em;}

  /* Network graphic */
  .network-graphic{position:relative;aspect-ratio:1/0.85;}
  .network-graphic svg{width:100%;height:100%;}
  .node{fill:var(--teal);}
  .node-pulse{animation:pulse 2.6s ease-in-out infinite;}
  @keyframes pulse{0%,100%{opacity:.9;r:5;}50%{opacity:.35;r:11;}}
  .link-line{stroke:rgba(20,184,166,.55);stroke-width:1.4;stroke-dasharray:4 5;animation:dash 30s linear infinite;}
  @keyframes dash{to{stroke-dashoffset:-500;}}

  /* Logo marquee */
  .marquee-band{background:#fff;padding:36px 0;border-bottom:1px solid var(--border);}
  .marquee-label{text-align:center;font-size:13px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.08em;margin-bottom:24px;font-weight:600;}
  .marquee-track{display:flex;overflow:hidden;position:relative;-webkit-mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);}
  .marquee-inner{display:flex;gap:64px;animation:scroll 28s linear infinite;white-space:nowrap;padding-right:64px;}
  .marquee-track:hover .marquee-inner{animation-play-state:paused;}
  @keyframes scroll{from{transform:translateX(0);}to{transform:translateX(-50%);}}
  .marquee-inner span{font-family:'Poppins',sans-serif;font-weight:600;font-size:18px;color:#9CA3AF;filter:grayscale(1);opacity:.75;transition:.2s;}
  .marquee-inner span:hover{color:var(--navy);opacity:1;}

  /* Stats section */
  .stats-band{background:var(--navy);color:#fff;}
  .stats-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:32px;text-align:center;}
  @media(min-width:768px){.stats-grid{grid-template-columns:repeat(4,1fr);}}
  .stats-grid .num{font-family:'Poppins',sans-serif;font-weight:700;font-size:44px;color:#fff;}
  .stats-grid .label{font-size:13px;color:rgba(255,255,255,.6);text-transform:uppercase;letter-spacing:.05em;margin-top:6px;}

  /* Section headers */
  .section-head{max-width:640px;margin:0 auto 48px;text-align:center;}
  .section-head h2{font-size:30px;}
  @media(min-width:1024px){.section-head h2{font-size:40px;}}
  .section-head p{color:var(--text-muted);margin-top:14px;font-size:17px;}

  /* About split */
  .about-grid{display:grid;gap:48px;align-items:center;}
  @media(min-width:1024px){.about-grid{grid-template-columns:1fr 1fr;gap:72px;}}
  .checklist{list-style:none;margin:24px 0 0;padding:0;display:flex;flex-direction:column;gap:14px;}
  .checklist li{display:flex;gap:12px;align-items:flex-start;font-size:16px;color:var(--text);}
  .checklist .check{flex:none;width:22px;height:22px;border-radius:50%;background:rgba(20,184,166,.15);color:#0F766E;display:flex;align-items:center;justify-content:center;font-size:13px;margin-top:2px;}
  .map-card{background:linear-gradient(160deg,#0A2342,#123a70);border-radius:20px;padding:40px;position:relative;overflow:hidden;box-shadow:var(--shadow-lg);}

  /* Cards */
  .grid-3{display:grid;grid-template-columns:1fr;gap:24px;}
  @media(min-width:768px){.grid-3{grid-template-columns:repeat(2,1fr);}}
  @media(min-width:1024px){.grid-3{grid-template-columns:repeat(3,1fr);}}
  .grid-4{display:grid;grid-template-columns:1fr;gap:24px;}
  @media(min-width:640px){.grid-4{grid-template-columns:repeat(2,1fr);}}
  @media(min-width:1024px){.grid-4{grid-template-columns:repeat(4,1fr);}}

  .card{
    background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
    padding:32px;transition:transform .25s cubic-bezier(.16,1,.3,1), box-shadow .25s;
    box-shadow:var(--shadow-sm);
  }
  .card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);}
  .icon-circle{width:52px;height:52px;border-radius:50%;background:rgba(20,184,166,.12);display:flex;align-items:center;justify-content:center;margin-bottom:18px;color:#0F766E;}
  .icon-circle svg{width:24px;height:24px;}
  .card h4{font-size:19px;margin-bottom:8px;}
  .card p{color:var(--text-muted);font-size:15px;margin:0;}
  .card .learn{display:inline-block;margin-top:14px;font-size:14px;font-weight:600;color:var(--royal);}

  /* Member card */
  .member-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:24px;text-align:center;transition:.25s cubic-bezier(.16,1,.3,1);box-shadow:var(--shadow-sm);}
  .member-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);}
  .member-logo{width:64px;height:64px;border-radius:14px;margin:0 auto 14px;display:flex;align-items:center;justify-content:center;font-family:'Poppins',sans-serif;font-weight:700;color:#fff;font-size:20px;}
  .member-card h4{font-size:16px;margin-bottom:4px;}
  .member-meta{font-size:13px;color:var(--text-muted);margin-bottom:12px;}
  .badge-row{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;margin-bottom:16px;}
  .badge{font-size:11px;font-weight:600;padding:4px 10px;border-radius:999px;background:#EEF2FF;color:var(--royal);}
  .badge.teal{background:rgba(20,184,166,.12);color:#0F766E;}

  /* Testimonials */
  .testi-track{display:flex;gap:24px;overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:8px;}
  .testi-track::-webkit-scrollbar{height:6px;}
  .testi-track::-webkit-scrollbar-thumb{background:var(--border);border-radius:6px;}
  .testi-card{scroll-snap-align:start;flex:0 0 320px;background:#fff;border-left:3px solid var(--teal);border-radius:0 16px 16px 0;padding:28px;box-shadow:var(--shadow-sm);}
  @media(min-width:640px){.testi-card{flex:0 0 380px;}}
  .testi-card p{font-style:italic;font-size:16.5px;color:var(--text);}
  .testi-person{display:flex;align-items:center;gap:12px;margin-top:20px;}
  .testi-avatar{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--royal),var(--teal));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:600;font-family:'Poppins',sans-serif;font-size:14px;}
  .testi-person .name{font-size:14.5px;font-weight:600;color:var(--navy);}
  .testi-person .role{font-size:13px;color:var(--text-muted);}

  /* News */
  .news-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:.25s;box-shadow:var(--shadow-sm);}
  .news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);}
  .news-thumb{height:170px;position:relative;}
  .news-cat{position:absolute;top:14px;left:14px;background:rgba(255,255,255,.92);color:var(--navy);font-size:11.5px;font-weight:600;padding:5px 12px;border-radius:999px;}
  .news-body{padding:22px;}
  .news-meta{font-size:12.5px;color:var(--text-muted);margin-bottom:8px;}
  .news-card h4{font-size:17px;margin-bottom:8px;line-height:1.35;}
  .news-card p{color:var(--text-muted);font-size:14.5px;margin:0;}

  /* Conference band */
  .conf-band{background:#fff;border-radius:24px;overflow:hidden;display:grid;box-shadow:var(--shadow-md);border:1px solid var(--border);}
  @media(min-width:900px){.conf-band{grid-template-columns:1.1fr 0.9fr;}}
  .conf-content{padding:44px;}
  .conf-visual{background:linear-gradient(135deg,var(--royal),var(--teal));min-height:220px;position:relative;overflow:hidden;}
  .conf-date{display:inline-flex;flex-direction:column;align-items:center;background:var(--bg);border:1px solid var(--border);border-radius:12px;padding:10px 16px;margin-bottom:20px;}
  .conf-date .d{font-family:'Poppins',sans-serif;font-weight:700;font-size:22px;color:var(--navy);line-height:1;}
  .conf-date .m{font-size:11px;text-transform:uppercase;color:var(--text-muted);letter-spacing:.05em;}

  /* Newsletter */
  .newsletter{background:linear-gradient(180deg,#ECFDFA,#F8FAFC);border-radius:24px;text-align:center;padding:56px 32px;}
  .newsletter-form{display:flex;flex-direction:column;gap:12px;max-width:440px;margin:28px auto 0;}
  @media(min-width:540px){.newsletter-form{flex-direction:row;}}
  .newsletter-form input{flex:1;height:50px;border-radius:10px;border:1px solid var(--border);padding:0 18px;font-size:15px;font-family:'Inter',sans-serif;}
  .newsletter-form input:focus{outline:none;border-color:var(--royal);box-shadow:0 0 0 3px rgba(29,78,216,.15);}

  /* Final CTA */
  .final-cta{background:linear-gradient(135deg,var(--navy),var(--royal));border-radius:28px;text-align:center;padding:72px 32px;color:#fff;}
  .final-cta h2{color:#fff;font-size:32px;}
  @media(min-width:1024px){.final-cta h2{font-size:42px;}}
  .final-cta p{color:rgba(255,255,255,.78);max-width:520px;margin:16px auto 32px;}

  /* Footer */
  footer{background:var(--navy);color:rgba(255,255,255,.7);padding:72px 0 28px;font-size:14.5px;}
  .footer-grid{display:grid;grid-template-columns:1fr;gap:40px;}
  @media(min-width:768px){.footer-grid{grid-template-columns:2fr 1fr 1fr 1fr;}}
  footer h5{color:#fff;font-family:'Poppins',sans-serif;font-size:14px;font-weight:600;margin-bottom:18px;letter-spacing:.03em;text-transform:uppercase;}
  footer ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px;}
  footer a:hover{color:#fff;}
  .footer-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:56px;padding-top:24px;display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;align-items:center;}
  .social-icons{display:flex;gap:14px;}
  .social-icons a{width:36px;height:36px;border-radius:50%;background:rgba(255,255,255,.08);display:flex;align-items:center;justify-content:center;transition:.2s;}
  .social-icons a:hover{background:var(--teal);color:#053b34;}

  .reveal{opacity:0;transform:translateY(16px);transition:opacity .6s cubic-bezier(.16,1,.3,1), transform .6s cubic-bezier(.16,1,.3,1);}
  .reveal.in{opacity:1;transform:translateY(0);}

  @media (prefers-reduced-motion: reduce){
    *{animation-duration:0.001ms !important; transition-duration:0.001ms !important;}
    .reveal{opacity:1;transform:none;}
  }

  ::selection{background:var(--teal);color:#fff;}
  :focus-visible{outline:3px solid rgba(29,78,216,.45);outline-offset:2px;}