/* reference stylesheet 1 */
:root {
  --blue: #0969d9;
  --blue-deep: #064fac;
  --blue-dark: #083b82;
  --cyan: #08bff8;
  --purple: #9d23ea;
  --gold: #f5c640;
  --text: #111827;
  --muted: #536170;
  --line: #dfe7f2;
  --soft: #f4f8ff;
  --surface: #fff;
  --shadow: 0 18px 45px rgba(8, 76, 160, .13);
  --radius: 10px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background: #fff;
  font-family: Arial, "Helvetica Neue", Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.72;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
.wrap { width: min(1180px, calc(100% - 48px)); margin: 0 auto; }

.topbar { background: #fff; border-bottom: 1px solid var(--line); }
.topbar-inner {
  min-height: 94px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand img { width: 166px; height: auto; }
.top-actions { display: flex; gap: 18px; align-items: center; }
.btn {
  min-height: 48px;
  padding: 0 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 900;
  line-height: 1;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-purple {
  color: #fff;
  background: linear-gradient(135deg, #c300ff, #6938ff);
  box-shadow: 0 12px 28px rgba(130, 54, 255, .25);
}
.btn-blue {
  color: #fff;
  background: linear-gradient(135deg, #0bc6ff, #0065d8);
  box-shadow: 0 12px 28px rgba(0, 110, 220, .24);
}
.btn-outline {
  color: var(--blue-deep);
  background: #fff;
  border-color: #88bafd;
}
.btn-solid {
  color: #fff;
  background: linear-gradient(135deg, #1688ff, #004fb8);
  box-shadow: 0 14px 28px rgba(8, 105, 217, .22);
}

.site-nav { background: #f2f3f5; border-bottom: 1px solid #e6e9ee; }
.nav-inner {
  min-height: 62px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  font-size: 15px;
  font-weight: 900;
}
.nav-inner a {
  min-height: 62px;
  display: inline-flex;
  align-items: center;
  color: #111;
  border-bottom: 4px solid transparent;
}
.nav-inner a:hover,
.nav-inner a.is-active { color: var(--blue); border-bottom-color: var(--blue); }

.hero { padding: 28px 0 16px; }
.hero-banner {
  overflow: hidden;
  border-radius: var(--radius);
  background: linear-gradient(135deg, #eaf6ff, #fff);
  box-shadow: var(--shadow);
}
.hero-banner img {
  width: 100%;
  aspect-ratio: 16 / 6.2;
  object-fit: cover;
}

.title-section { padding: 12px 0 26px; }
.page-title {
  margin: 0 0 22px;
  color: var(--blue-deep);
  text-align: center;
  font-size: clamp(28px, 3.1vw, 44px);
  line-height: 1.18;
  font-weight: 900;
}
.content-block {
  max-width: 1180px;
  margin: 0 auto;
}
.content-block p {
  margin: 0 0 18px;
  color: #1f2937;
}
.section { padding: 26px 0; }
.section h2,
.section-heading {
  margin: 0 0 18px;
  color: var(--blue-deep);
  font-size: clamp(26px, 2.4vw, 36px);
  line-height: 1.2;
  font-weight: 900;
}

.info-table {
  overflow: hidden;
  margin-top: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}
.info-row {
  display: grid;
  grid-template-columns: 300px 1fr;
  border-top: 1px solid var(--line);
}
.info-row:first-child { border-top: 0; }
.info-row.is-head {
  background: linear-gradient(90deg, #f4f9ff, #fff);
  color: #183250;
  font-weight: 900;
}
.info-cell {
  padding: 14px 26px;
  border-left: 1px solid var(--line);
}
.info-cell:first-child { border-left: 0; color: #455468; font-weight: 800; }

.promo {
  margin-top: 26px;
  display: grid;
  grid-template-columns: .88fr 1.12fr;
  align-items: center;
  overflow: hidden;
  border-radius: var(--radius);
  background: linear-gradient(135deg, #eef8ff, #dff1ff);
  box-shadow: var(--shadow);
}
.promo-copy { padding: 44px 32px 44px 58px; }
.promo-copy h2 { margin-bottom: 20px; }
.promo-list {
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}
.promo-list li { position: relative; padding-left: 30px; color: #183250; font-weight: 700; }
.promo-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 17px;
  height: 17px;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: inset 0 0 0 4px #fff;
}
.promo img {
  width: 100%;
  height: 100%;
  min-height: 360px;
  object-fit: cover;
}
.grade-band {
  margin: 18px auto 0;
  width: min(860px, 100%);
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  border-radius: 8px;
  color: var(--blue-deep);
  background: linear-gradient(90deg, #cef7e6, #cbe9ff);
  font-size: clamp(28px, 3vw, 42px);
  font-weight: 900;
}
.grade-band span { color: var(--gold); }

.link-grid {
  margin-top: 22px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}
.link-card {
  min-height: 58px;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  border: 1px solid #76aaf2;
  border-radius: 8px;
  color: var(--blue-deep);
  background: #fff;
  font-weight: 900;
}
.notice {
  margin-top: 22px;
  padding: 16px 20px;
  border: 1px solid #b9d7ff;
  border-radius: 8px;
  color: #294464;
  background: #f2f8ff;
}

.news-section { padding: 42px 0 54px; }
.center-title {
  margin: 0 auto 36px;
  text-align: center;
  color: var(--blue-deep);
  font-size: clamp(30px, 3vw, 42px);
  line-height: 1.15;
  font-weight: 900;
}
.news-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 26px;
}
.news-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 14px 32px rgba(8, 76, 160, .1);
  transition: transform .18s ease, box-shadow .18s ease;
}
.news-card:hover { transform: translateY(-3px); box-shadow: 0 20px 42px rgba(8, 76, 160, .16); }
.news-card figure { margin: 0; aspect-ratio: 16 / 10; overflow: hidden; background: #e9f4ff; }
.news-card img { width: 100%; height: 100%; object-fit: cover; }
.news-body { padding: 18px 18px 20px; }
.news-meta {
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: #667085;
  font-size: 12px;
}
.news-meta span:first-child {
  padding: 4px 8px;
  border-radius: 4px;
  color: #fff;
  background: var(--blue);
  font-weight: 900;
  text-transform: uppercase;
}
.news-card h3 {
  min-height: 62px;
  margin: 0 0 10px;
  color: #111827;
  font-size: 18px;
  line-height: 1.35;
  font-weight: 900;
}
.news-card p {
  min-height: 72px;
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}
.read-more { color: var(--blue); font-size: 14px; font-weight: 900; }
.read-more::after { content: " ->"; }
.section-actions { margin-top: 30px; display: flex; justify-content: center; }
.pager { margin-top: 28px; text-align: center; color: var(--blue-deep); font-weight: 800; }

.faq { padding: 28px 0 56px; }
.faq h2 {
  display: flex;
  align-items: center;
  gap: 12px;
}
.faq h2::before {
  content: "";
  width: 28px;
  height: 28px;
  border: 2px solid var(--blue);
  border-radius: 4px;
  background: linear-gradient(135deg, #fff, #e5f2ff);
}
.faq-list {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}
.faq-row {
  min-height: 55px;
  padding: 0 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--line);
  color: #253143;
}
.faq-row:first-child { border-top: 0; }
.faq-row::after {
  content: "";
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--blue);
  border-bottom: 2px solid var(--blue);
  transform: rotate(45deg);
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #f8fbff;
}
.footer-grid {
  padding: 38px 0 32px;
  display: grid;
  grid-template-columns: 1.35fr 1fr 1fr 1.25fr;
  gap: 36px;
}
.footer-logo { width: 132px; margin-bottom: 12px; }
.footer-grid h3 {
  margin: 0 0 14px;
  color: var(--blue-dark);
  font-size: 16px;
  font-weight: 900;
}
.footer-grid p,
.footer-grid li {
  color: #536170;
  font-size: 14px;
  line-height: 1.65;
}
.footer-grid ul { margin: 0; padding: 0; list-style: none; }
.footer-grid li + li { margin-top: 8px; }
.pay-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.pay-list span {
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #fff;
  color: var(--blue-dark);
  font-size: 13px;
  font-weight: 900;
}
.footer-bottom {
  padding: 16px 0;
  color: #fff;
  background: linear-gradient(90deg, #075fbe, #004ca8);
  font-size: 13px;
}
.footer-bottom .wrap { display: flex; align-items: center; justify-content: space-between; gap: 18px; }

.article-page { padding: 46px 0 64px; }
.article-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  gap: 48px;
  align-items: start;
}
.article-main { min-width: 0; }
.article-hero {
  padding-bottom: 24px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--line);
}
.article-hero h1 {
  margin: 0 0 14px;
  color: #0c1726;
  font-size: clamp(34px, 3.8vw, 54px);
  line-height: 1.16;
  font-weight: 900;
}
.article-meta { color: #667085; font-size: 14px; }
.article-content {
  color: #253143;
  font-size: 17px;
  line-height: 1.85;
}
.article-content h2,
.article-content h3 {
  margin: 30px 0 12px;
  color: var(--blue-deep);
  line-height: 1.25;
}
.article-content p { margin: 0 0 18px; }
.article-content img { margin: 24px 0; border-radius: var(--radius); }
.article-sidebar { position: sticky; top: 24px; display: grid; gap: 18px; }
.side-panel {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 12px 28px rgba(8, 76, 160, .08);
}
.side-panel h3 { margin: 0 0 14px; color: var(--blue-dark); font-size: 20px; font-weight: 900; }
.side-panel p { margin: 0 0 18px; color: #536170; }
.side-panel ul { margin: 0; padding: 0; list-style: none; }
.side-panel li + li { margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--line); }
.side-panel a { color: #1f2937; font-weight: 800; }
.side-cta { color: #fff; background: linear-gradient(145deg, #075fbe, #004ca8); }
.side-cta h3,
.side-cta p { color: #fff; }

@media (max-width: 980px) {
  .topbar-inner { min-height: auto; padding: 16px 0; flex-wrap: wrap; }
  .brand img { width: 132px; }
  .nav-inner { justify-content: flex-start; gap: 26px; overflow-x: auto; }
  .nav-inner a { white-space: nowrap; }
  .promo { grid-template-columns: 1fr; }
  .promo-copy { padding: 32px; }
  .news-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .article-shell { grid-template-columns: 1fr; }
  .article-sidebar { position: static; grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  .wrap { width: min(100% - 28px, 1180px); }
  .top-actions { width: 100%; justify-content: space-between; gap: 12px; }
  .top-actions .btn { flex: 1; }
  .btn { min-height: 44px; padding: 0 14px; font-size: 14px; }
  .nav-inner { min-height: 48px; gap: 20px; font-size: 13px; }
  .nav-inner a { min-height: 48px; }
  .hero-banner img { aspect-ratio: 1 / .72; object-position: 48% center; }
  .page-title { text-align: left; }
  .info-row { grid-template-columns: 1fr; }
  .info-cell { border-left: 0; border-top: 1px solid var(--line); }
  .info-row.is-head .info-cell + .info-cell { display: none; }
  .link-grid,
  .news-grid,
  .footer-grid,
  .article-sidebar { grid-template-columns: 1fr; }
  .news-card h3,
  .news-card p { min-height: 0; }
  .grade-band { min-height: 58px; font-size: 24px; }
  .footer-bottom .wrap { flex-direction: column; align-items: flex-start; }
}


/* Target Bengali content and Dede integration */
:root{--clone-dark:#111827;--clone-bg2:#116600;--clone-accent:#075fbe;--clone-gold:#f5c640;--clone-blue:#536170;}
body.true-reference-clone{font-family:Arial,"Kohinoor Bangla","Noto Sans Bengali",sans-serif;letter-spacing:0;}
body.true-reference-clone img[src*="oktk-logo"]{height:auto;object-fit:contain;}
body.true-reference-clone img[src*="oktk-hero"]{height:auto;object-fit:contain;}
.dede-update-zone,.article-detail-zone{padding:34px 0;}
.clone-update-inner,.clone-article-inner{width:min(1180px,calc(100% - 32px));margin:0 auto;}
.clone-update-head{text-align:center;margin-bottom:20px;}
.clone-update-head h2{margin:0;font-size:clamp(26px,3vw,38px);font-weight:900;line-height:1.2;}
.clone-update-head p{max-width:760px;margin:10px auto 0;color:#667085;}
.clone-update-list{display:grid;gap:16px;}
.clone-update-card{display:grid;grid-template-columns:170px minmax(0,1fr);gap:18px;padding:16px;border:1px solid rgba(20,25,40,.12);border-radius:10px;background:#fff;box-shadow:0 14px 34px rgba(20,25,40,.08);}
.clone-update-thumb{min-height:120px;border-radius:8px;background:linear-gradient(135deg,var(--clone-dark),var(--clone-accent));color:#fff;display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:900;text-decoration:none;}
.clone-update-tag{display:inline-flex;margin-bottom:6px;padding:4px 10px;border-radius:999px;background:rgba(0,0,0,.06);color:var(--clone-accent);font-weight:900;font-size:12px;}
.clone-update-body h3{margin:0;font-size:22px;line-height:1.32;}
.clone-update-body p{margin:8px 0;color:#5f6675;}
.clone-update-meta{display:flex;flex-wrap:wrap;gap:12px;color:#8a91a1;font-size:13px;}
.clone-readmore{display:inline-flex;margin-top:10px;color:var(--clone-accent);font-weight:900;text-decoration:none;}
.clone-pagination{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;margin:22px 0 0;}
.clone-pagination li{list-style:none;}
.clone-pagination a,.clone-pagination span{display:inline-flex;min-width:38px;min-height:36px;align-items:center;justify-content:center;border:1px solid rgba(20,25,40,.14);border-radius:8px;padding:0 12px;background:#fff;color:#1c2433;text-decoration:none;font-weight:800;}
.clone-article-inner{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:22px;align-items:start;}
.clone-article,.clone-article-side{background:#fff;border:1px solid rgba(20,25,40,.12);border-radius:10px;box-shadow:0 14px 34px rgba(20,25,40,.08);padding:24px;}
.clone-crumb{color:#778094;font-size:14px;margin-bottom:12px;}
.clone-article h1{margin:0;font-size:clamp(30px,3vw,46px);line-height:1.2;}
.clone-article-meta{display:flex;gap:12px;flex-wrap:wrap;margin:12px 0 18px;color:#7d8494;font-size:14px;}
.clone-article-summary{padding:14px 16px;border-left:4px solid var(--clone-accent);background:rgba(0,0,0,.04);margin-bottom:20px;color:#505a6c;}
.clone-article-body{font-size:17px;line-height:1.9;color:#252b38;}
.clone-prenext{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:20px;}
.clone-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px;}
.clone-actions a,.clone-article-side a{display:inline-flex;margin:6px 6px 0 0;padding:9px 12px;border-radius:8px;background:var(--clone-accent);color:#fff;text-decoration:none;font-weight:800;}
@media(max-width:780px){.clone-update-card,.clone-article-inner,.clone-prenext{grid-template-columns:1fr;}}