:root{
  --red:#e5252c; --red-dark:#b81a20;
  --green:#0c8645; --green-dark:#08602f;
  --ink:#1b1f1d; --muted:#5b645f;
  --paper:#fbfaf7; --soft:#f1efe8; --line:#ddd9cc;
  --radius:10px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{font-family:"Hind Siliguri",system-ui,sans-serif;color:var(--ink);background:var(--paper);line-height:1.7;font-size:17px}
img{max-width:100%;display:block}
a{color:inherit}
:focus-visible{outline:3px solid var(--green);outline-offset:2px}

/* Nav */
.nav{position:sticky;top:0;z-index:50;display:flex;align-items:center;justify-content:space-between;padding:10px 5vw;background:rgba(251,250,247,.95);backdrop-filter:blur(6px);border-bottom:3px solid var(--red)}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:700;font-size:1.1rem}
.nav nav{display:flex;gap:22px}
.nav nav a{text-decoration:none;font-weight:500;padding:4px 0;border-bottom:2px solid transparent;transition:border-color .25s,color .25s}
.nav nav a:hover{color:var(--green);border-color:var(--green)}
.menu-btn{display:none;background:none;border:1px solid var(--line);border-radius:8px;font-size:1.3rem;padding:2px 12px;cursor:pointer}

/* Buttons */
.btn{display:inline-block;padding:12px 26px;border-radius:999px;font-weight:700;text-decoration:none;border:2px solid transparent;cursor:pointer;font:inherit;font-weight:700;transition:transform .2s,background .25s,color .25s,box-shadow .25s}
.btn:hover{transform:translateY(-3px);box-shadow:0 8px 18px rgba(0,0,0,.18)}
.btn-red{background:var(--red);color:#fff}.btn-red:hover{background:var(--red-dark)}
.btn-ghost{border-color:var(--green);color:var(--green);background:transparent}.btn-ghost:hover{background:var(--green);color:#fff}
.btn-fb{background:var(--green);color:#fff}.btn-fb:hover{background:var(--green-dark)}
.btn-share{background:#fff;border-color:var(--line);color:var(--ink)}.btn-share:hover{background:var(--red);color:#fff;border-color:var(--red)}

/* Hero */
.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:4vw;align-items:center;padding:7vh 5vw 8vh;min-height:calc(100vh - 70px);background:linear-gradient(180deg,var(--red) 0 50%,var(--green) 50% 100%) left/12px 100% no-repeat,var(--paper)}
.hero-text{padding-left:3vw}
.org{font-weight:500;color:var(--green-dark);margin-bottom:10px}
.hero h1{font-family:"Noto Serif Bengali",serif;font-size:clamp(2.4rem,6vw,4.6rem);line-height:1.2;color:var(--red)}
.en-name{font-size:1.3rem;color:var(--muted);margin:4px 0 18px;letter-spacing:.04em}
.lead{max-width:34em;font-size:1.15rem;margin-bottom:28px}
.cta{display:flex;flex-wrap:wrap;gap:14px}
.hero-photo img{width:100%;aspect-ratio:4/5;object-fit:cover;border-radius:var(--radius);border-bottom:10px solid var(--green);border-right:10px solid var(--red);background:var(--soft)}

/* Hero entrance — one orchestrated moment */
.org,.hero h1,.en-name,.lead,.cta{opacity:0;transform:translateY(22px);animation:rise .8s ease forwards}
.org{animation-delay:.1s}.hero h1{animation-delay:.25s}.en-name{animation-delay:.4s}.lead{animation-delay:.55s}.cta{animation-delay:.7s}
.hero-photo{opacity:0;transform:scale(.96);animation:pop 1s .35s ease forwards}
@keyframes rise{to{opacity:1;transform:none}}
@keyframes pop{to{opacity:1;transform:none}}

/* Sections */
.section{padding:9vh 5vw;max-width:1200px;margin:0 auto}
.section.alt{max-width:none;background:var(--soft)}
.section.alt>*{max-width:1200px;margin-left:auto;margin-right:auto}
.section h2{font-family:"Noto Serif Bengali",serif;font-size:clamp(1.7rem,3.5vw,2.4rem);margin-bottom:10px;padding-left:16px;border-left:6px solid var(--red)}
.sub{color:var(--muted);margin:0 0 24px 22px}
.about-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:40px;margin-top:24px}
.facts{list-style:none;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
.facts li{padding:14px 18px;border-bottom:1px solid var(--line);display:flex;gap:14px}
.facts li:last-child{border:0}
.facts strong{min-width:5.5em;color:var(--green-dark)}

/* Gallery */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px}
.tile{overflow:hidden;border-radius:var(--radius);aspect-ratio:4/3;background:#d9d6ca;display:block}
.tile img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.tile:hover img{transform:scale(1.07)}

/* Connect */
.connect{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:24px}
.fb-card,.share-card{border:1px solid var(--line);border-radius:var(--radius);padding:28px;background:#fff}
.fb-card{border-top:6px solid var(--green)}.share-card{border-top:6px solid var(--red)}
.fb-card h3,.share-card h3{margin-bottom:8px}
.fb-card p{margin-bottom:18px;color:var(--muted)}
.share{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}

/* Footer */
.footer{background:#17201b;color:#e9ece8;padding:7vh 5vw;border-top:8px solid var(--green)}
.footer-inner{max-width:900px;margin:0 auto}
.footer h2{font-family:"Noto Serif Bengali",serif;font-size:1.5rem;margin-bottom:16px}
.paid{margin-bottom:6px}.paid span{color:#ffd7d8}
.disclaimer{margin:16px 0;padding:14px 18px;border-left:4px solid var(--red);background:rgba(255,255,255,.06);font-size:.95rem}
.ext{color:#9fe3b9;text-underline-offset:3px;transition:color .2s}.ext:hover{color:#fff}
.copy{margin-top:22px;font-size:.9rem;color:#a9b1ac}

/* Lightbox */
.lightbox{position:fixed;inset:0;z-index:100;background:rgba(0,0,0,.92);display:flex;align-items:center;justify-content:center;animation:fade .25s}
.lightbox[hidden]{display:none}
.lightbox img{max-width:90vw;max-height:86vh;border-radius:6px}
.lb-close,.lb-nav{position:absolute;background:rgba(255,255,255,.12);color:#fff;border:0;border-radius:50%;width:48px;height:48px;font-size:2rem;line-height:1;cursor:pointer;transition:background .2s}
.lb-close:hover,.lb-nav:hover{background:var(--red)}
.lb-close{top:18px;right:18px}.prev{left:14px}.next{right:14px}
@keyframes fade{from{opacity:0}}

/* Responsive */
@media(max-width:820px){
  .menu-btn{display:block}
  .nav nav{display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;gap:0;background:var(--paper);border-bottom:3px solid var(--red)}
  .nav nav.open{display:flex}
  .nav nav a{padding:14px 5vw;border-bottom:1px solid var(--line)}
  .hero{grid-template-columns:1fr;background-size:8px 100%}
  .hero-text{padding-left:12px}
  .hero-photo{max-width:420px}
  .about-grid,.connect{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .org,.hero h1,.en-name,.lead,.cta,.hero-photo{opacity:1;transform:none}
}