/* Bangladesh Bio Health Society website */
:root{
  --primary:#075f73;
  --primary-dark:#073d49;
  --secondary:#0ea5a4;
  --accent:#f59e0b;
  --ink:#102333;
  --muted:#617483;
  --bg:#f5fafb;
  --white:#ffffff;
  --line:#dbe8ed;
  --shadow:0 18px 50px rgba(8,51,68,.12);
  --radius:22px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:Arial, Helvetica, sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.65;
}
a{color:inherit;text-decoration:none}
.container{width:min(1140px, calc(100% - 40px));margin:0 auto}
.topbar{background:var(--primary-dark);color:#dff8fa;padding:8px 0;font-size:14px}
.topbar .container{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;align-items:center}
.topbar a{color:#fff;font-weight:700}
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
.nav{min-height:78px;display:flex;align-items:center;justify-content:space-between;gap:22px}
.brand{display:flex;align-items:center;gap:13px;color:var(--primary-dark);font-weight:900;letter-spacing:-.03em;font-size:22px}
.brand-mark{width:48px;height:48px;border-radius:15px;background:linear-gradient(135deg,var(--primary),var(--secondary));color:#fff;display:grid;place-items:center;font-size:16px;box-shadow:0 12px 25px rgba(14,165,164,.26)}
.brand small{display:block;color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.08em;margin-top:-3px}
.menu{display:flex;gap:18px;font-weight:700;font-size:15px;color:#2d4a57;align-items:center;flex-wrap:wrap}
.menu a{padding:8px 0;border-bottom:2px solid transparent}
.menu a:hover,.menu a.active{color:var(--primary);border-color:var(--secondary)}
.hero{
  background:radial-gradient(circle at 12% 15%, rgba(14,165,164,.22), transparent 32%),
             radial-gradient(circle at 88% 12%, rgba(245,158,11,.18), transparent 28%),
             linear-gradient(135deg,#eaf9fb 0%, #ffffff 54%, #eef9f5 100%);
  padding:90px 0 74px;overflow:hidden
}
.hero-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:46px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 13px;background:#fff;border:1px solid #bde4e7;border-radius:999px;color:var(--primary);font-size:13px;font-weight:900;text-transform:uppercase;letter-spacing:.08em}
h1{margin:22px 0 20px;color:#082f3b;font-size:clamp(40px,5.7vw,66px);line-height:1.05;letter-spacing:-.055em}
.lead{color:#36515f;font-size:20px;max-width:760px;margin:0 0 28px}
.btn-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:26px}
.btn{display:inline-flex;justify-content:center;align-items:center;gap:8px;border-radius:999px;padding:12px 19px;font-weight:900;border:1px solid transparent;transition:.18s ease;cursor:pointer}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 12px 26px rgba(11,95,115,.22)}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px)}
.btn-light{background:#fff;color:var(--primary);border-color:#c8e5eb}
.btn-light:hover{border-color:var(--primary);transform:translateY(-1px)}
.hero-card{background:#fff;border:1px solid var(--line);border-radius:30px;padding:30px;box-shadow:var(--shadow);position:relative}
.hero-card:before{content:"";position:absolute;inset:18px -16px -16px 18px;background:linear-gradient(135deg,rgba(14,165,164,.24),rgba(11,95,115,.08));border-radius:30px;z-index:-1}
.hero-card h2{margin:0 0 10px;color:#0b2f3b;font-size:30px;line-height:1.16;letter-spacing:-.04em}
.hero-card p{color:var(--muted);margin:0}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:34px}
.stat{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:0 12px 30px rgba(8,51,68,.08)}
.stat strong{display:block;color:var(--primary-dark);font-size:24px;line-height:1.1}
.stat span{color:var(--muted);font-size:13px;font-weight:700}
section{padding:76px 0}
.page-hero{background:linear-gradient(135deg,#eaf9fb 0%,#ffffff 62%,#eef9f5 100%);padding:62px 0 52px;border-bottom:1px solid var(--line)}
.page-hero h1{font-size:clamp(36px,5vw,58px);max-width:850px}
.page-hero p{font-size:19px;color:#405967;max-width:830px}
.section-title{max-width:800px;text-align:center;margin:0 auto 38px}
.section-title .label{color:var(--secondary);font-size:13px;font-weight:900;text-transform:uppercase;letter-spacing:.14em}
.section-title h2{color:#0b2f3b;margin:8px 0 12px;font-size:clamp(30px,4vw,46px);line-height:1.14;letter-spacing:-.04em}
.section-title p{color:var(--muted);font-size:18px;margin:0}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:0 14px 32px rgba(8,51,68,.07)}
.card h3{margin:0 0 10px;color:#0b3a49;font-size:22px}
.card p{color:var(--muted);margin:0 0 14px}
.about-band{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.about-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:42px;align-items:start}
.panel{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;border-radius:30px;padding:34px;box-shadow:var(--shadow)}
.panel h2{margin:0 0 14px;font-size:34px;letter-spacing:-.04em;line-height:1.15}
.panel p{color:#e1f7fa;margin:0 0 20px}
.checklist{list-style:none;margin:0;padding:0;display:grid;gap:13px}
.checklist li{color:#eafcff;display:flex;gap:10px;align-items:flex-start}
.checklist li:before{content:"✓";color:#96f2e8;font-weight:900}
.text-block h2{color:#0b2f3b;font-size:38px;line-height:1.15;letter-spacing:-.04em;margin:0 0 16px}
.text-block p{color:#4b6370;font-size:17px;margin:0 0 16px}
.pill-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.pill{padding:8px 12px;border-radius:999px;background:#e9f7f8;color:var(--primary);font-weight:900;font-size:13px}
.table-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 14px 32px rgba(8,51,68,.06)}
table{width:100%;border-collapse:collapse;min-width:720px}
th,td{text-align:left;padding:16px;border-bottom:1px solid var(--line);vertical-align:top}
th{background:#eef8fa;color:#0b3a49}
tr:last-child td{border-bottom:0}
.notice{background:#fff8e8;border:1px solid #f7d994;border-radius:18px;padding:18px;color:#63440b}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.contact-box{background:#fff;border:1px solid var(--line);border-radius:24px;padding:30px;box-shadow:0 12px 28px rgba(8,51,68,.06)}
.contact-box h3{margin:0 0 12px;color:#0b3a49;font-size:24px}
.contact-box p{color:var(--muted);margin:0 0 16px}
.contact-item{padding:14px 0;border-bottom:1px solid var(--line)}
.contact-item:last-child{border-bottom:0}
.contact-item strong{display:block;color:#0b2f3b}
.contact-item span,.contact-item a{color:var(--muted)}
.form-card{background:#fff;border:1px solid var(--line);border-radius:28px;box-shadow:var(--shadow);padding:30px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.form-group{display:flex;flex-direction:column;gap:7px}
.form-group.full{grid-column:1 / -1}
label{font-weight:800;color:#0b3a49;font-size:14px}
input,select,textarea{width:100%;border:1px solid #cfe0e6;border-radius:14px;padding:13px 14px;font:inherit;color:var(--ink);background:#fff;outline:none}
input:focus,select:focus,textarea:focus{border-color:var(--secondary);box-shadow:0 0 0 4px rgba(14,165,164,.12)}
textarea{min-height:130px;resize:vertical}
.help-text{font-size:13px;color:var(--muted);margin-top:12px}
footer{background:#062f3a;color:#d8f4f7;padding:34px 0;font-size:14px}
footer .container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:18px}
footer a{color:#fff;font-weight:700}
@media(max-width:980px){.hero-grid,.about-grid,.contact-grid{grid-template-columns:1fr}.cards{grid-template-columns:1fr 1fr}.menu{display:none}}
@media(max-width:640px){.container{width:min(100% - 28px,1140px)}.hero{padding:64px 0 50px}.stats,.cards,.form-grid{grid-template-columns:1fr}.form-group.full{grid-column:auto}h1{font-size:38px}.lead{font-size:17px}}