/* Variables */
:root{
  --green-500: #26a65b;
  --green-700: #1e8a48;
  --purple-500: #7a4dd6;
  --purple-700: #5b36a8;
  --bg: #f8fafb;
  --muted: #6b7280;
  --card: #ffffff;
}

*{box-sizing:border-box}
html,body{height:100%;}
body{
  margin:0;
  font-family:Inter, system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial;
  background:var(--bg);
  color:#0f172a;
  -webkit-font-smoothing:antialiased;
}
.container{max-width:1100px;margin:0 auto;padding:0 20px;}

/* Navbar */
.navbar{position:fixed;top:0;left:0;right:0;z-index:40;transition:background-color .35s ease,backdrop-filter .35s ease;padding:14px 0}
.nav-inner{display:flex;align-items:center;justify-content:space-between}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none}
.brand img{height:44px;width:auto;display:block}
.visually-hidden{position:absolute!important;height:1px;width:1px;overflow:hidden;clip:rect(1px,1px,1px,1px);white-space:nowrap;border:0;padding:0;margin:-1px}
.nav-links{list-style:none;display:flex;gap:18px;margin:0;padding:0}
.nav-links a{color:rgba(255,255,255,0.95);text-decoration:none;padding:8px 10px;border-radius:8px;transition:background .2s}
.nav-links a:hover{background:rgba(255,255,255,0.08)}
.nav-toggle{display:none;background:transparent;border:0;color:white;font-size:1.2rem}

.navbar.scrolled{background:linear-gradient(90deg, rgba(255,255,255,0.95), rgba(255,255,255,0.95));backdrop-filter: blur(6px);box-shadow:0 6px 18px rgba(12,16,26,0.08)}
.navbar.scrolled .brand{color:var(--purple-700)}
.navbar.scrolled .nav-links a{color:var(--purple-700)}

/* Hero */
.hero{position:relative;height:100vh;display:flex;align-items:center}
.hero-overlay{position:absolute;inset:0;background-image: linear-gradient(120deg, rgba(122,77,214,0.30), rgba(38,166,91,0.30)), url('../images/hero.jpg');background-size:cover;background-position:center;background-repeat:no-repeat;mix-blend-mode:normal}
.hero-content{position:relative;color:white;padding:40px 20px;text-align:center}
.hero h1{font-size:clamp(2rem,5vw,3.4rem);line-height:1.02;margin:0 0 12px}
.hero .lead{font-size:1.1rem;opacity:0.95;margin-bottom:22px}
.hero-ctas{display:flex;gap:12px;justify-content:center}

/* Buttons */
.btn{display:inline-block;padding:12px 18px;border-radius:999px;font-weight:600;text-decoration:none;transition:transform .15s ease,box-shadow .15s ease}
.btn:active{transform:translateY(1px)}
.btn-primary{background:linear-gradient(90deg,var(--green-500),var(--purple-500));color:white;box-shadow:0 8px 24px rgba(38,166,91,0.18)}
.btn-outline{background:transparent;border:2px solid rgba(255,255,255,0.14);color:white}

/* Sections */
.section{padding:80px 0}
.section-alt{background:linear-gradient(180deg, rgba(255,255,255,0.9), rgba(248,250,251,0.9));}
h2{margin-top:0}

.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:24px;margin-top:20px}
.card{background:var(--card);border-radius:16px;padding:18px;box-shadow:0 8px 24px rgba(15,23,42,0.06);text-align:center}
.card img{width:100%;height:160px;object-fit:cover;border-radius:10px;margin-bottom:12px}

/* Clickable card wrapper */
.card-link{display:block;color:inherit;text-decoration:none}
.card-link .card{transition:transform .18s ease,box-shadow .18s ease}
.card-link:hover .card{transform:translateY(-6px);box-shadow:0 18px 36px rgba(15,23,42,0.12)}

.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.contact-form{display:flex;flex-direction:column;gap:12px}
.contact-form label{display:flex;flex-direction:column;gap:8px}
.contact-form input,.contact-form textarea{padding:12px;border-radius:10px;border:1px solid #e6e9ef;width:100%}
.contact-list{padding-left:0;list-style:none}

/* Partners */
.partners-grid{display:flex;gap:24px;align-items:center;justify-content:center;flex-wrap:wrap;margin-top:18px}
.partner-logo{height:64px;object-fit:contain;padding:12px;background:var(--card);border-radius:10px;box-shadow:0 6px 18px rgba(15,23,42,0.06)}

@media (max-width:760px){
  .partners-grid{gap:14px}
  .partner-logo{height:48px}
}

/* Program image galleries */
.program-gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px;margin-top:18px}
.program-thumb{width:100%;height:120px;object-fit:contain;border-radius:10px;box-shadow:0 8px 20px rgba(15,23,42,0.06);background:#fff;padding:6px}

@media (min-width:900px){
  .program-thumb{height:160px}
}

.footer{padding:24px 0;text-align:center;color:var(--muted);background:transparent}

/* Responsive */
@media (max-width:880px){
  .nav-links{position:fixed;top:64px;right:16px;background:linear-gradient(180deg, rgba(255,255,255,0.98), rgba(255,255,255,0.98));flex-direction:column;padding:12px;border-radius:12px;display:none;box-shadow:0 10px 30px rgba(12,16,26,0.08)}
  .nav-links.show{display:flex}
  .nav-toggle{display:block}
  .nav-inner{gap:12px}
  .contact-grid{grid-template-columns:1fr}
}

/* Utility */
html{scroll-behavior:smooth}

/* Lightbox overlay */
.lightbox-overlay{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,0.75);z-index:200;opacity:0;pointer-events:none;transition:opacity .18s}
.lightbox-overlay.open{opacity:1;pointer-events:auto}
.lightbox-inner{max-width:95%;max-height:90%;display:flex;align-items:center;justify-content:center}
.lightbox-inner img{max-width:100%;max-height:100%;border-radius:6px;box-shadow:0 18px 48px rgba(2,6,23,0.7)}
.lightbox-close{position:fixed;top:18px;right:18px;color:#fff;background:transparent;border:0;font-size:28px;cursor:pointer;z-index:210}
.lightbox-caption{position:fixed;left:20px;right:20px;bottom:22px;color:#fff;text-align:center;font-size:0.95rem;opacity:0.95}

/* Lightbox navigation buttons */
.lightbox-nav{position:fixed;top:50%;transform:translateY(-50%);z-index:210;display:flex;gap:12px;align-items:center}
.lightbox-prev{left:18px}
.lightbox-next{right:18px}
.lightbox-nav button{background:rgba(0,0,0,0.45);border:0;color:#fff;width:52px;height:52px;border-radius:999px;font-size:20px;cursor:pointer;display:flex;align-items:center;justify-content:center}
.lightbox-nav button:hover{background:rgba(0,0,0,0.6)}