:root {
  --navy: #143e5d;
  --navy-dark: #0e2b42;
  --blue: #54aef1;
  --cyan: #b9efff;
  --panel: #303030;
  --panel-soft: #383838;
  --line: #58aeea;
  --gold: #ffd44d;
  --ink: #ffffff;
  --muted: #d8e5ef;
  --shadow: 0 16px 34px rgba(5, 22, 38, .32);
  font-family: "Noto Sans Bengali", "Hind Siliguri", "Segoe UI", Arial, sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: #303030; color: var(--ink); font-family: inherit; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
.wrap { width: min(1080px, calc(100% - 38px)); margin: 0 auto; }
.top { background: var(--navy); padding: 16px 0 10px; }
.top-row { display: flex; justify-content: space-between; align-items: center; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; font-size: 36px; font-weight: 950; color: #9fe5ff; letter-spacing: 0; text-shadow: 0 3px 0 rgba(0,0,0,.2); }
.brand-mark { width: 58px; height: 58px; border-radius: 12px; display: grid; place-items: center; color: #fff; font-size: 18px; font-weight: 950; background: linear-gradient(135deg, #baf5ff, #58aeea 46%, #194b71); transform: rotate(45deg); box-shadow: inset 0 0 0 2px rgba(255,255,255,.22); }
.brand-mark span { transform: rotate(-45deg); }
.actions { display: flex; gap: 18px; }
.btn { display: inline-flex; min-height: 44px; align-items: center; justify-content: center; border-radius: 999px; padding: 0 24px; font-size: 15px; font-weight: 950; border: 1px solid transparent; }
.btn.sky { background: #5db9ff; color: #fff; box-shadow: 0 10px 22px rgba(13, 82, 136, .22); }
.btn.line { border-color: var(--line); color: #d8f4ff; background: rgba(84,174,241,.08); }
.navband { background: var(--navy); border-top: 1px solid rgba(255,255,255,.06); }
.nav { display: flex; min-height: 62px; align-items: center; justify-content: center; gap: 24px; flex-wrap: wrap; font-size: 16px; font-weight: 950; color: #fff; }
.nav a:hover, .nav a.active { color: var(--cyan); }
.hero { background: var(--panel); }
.hero-banner { width: 100%; background: #cdeeff; overflow: hidden; box-shadow: var(--shadow); }
.hero-banner img { width: 100%; height: clamp(260px, 29vw, 390px); object-fit: cover; object-position: center; }
.cards-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; padding: 30px 0 20px; }
.feature-card { text-align: center; }
.feature-card img { width: 100%; aspect-ratio: 16/9; object-fit: cover; border: 1px solid rgba(121,196,240,.45); }
.feature-card h3 { margin: 16px 0 8px; font-size: 20px; line-height: 1.3; font-weight: 950; }
.mini-line { width: 32px; height: 2px; margin: 0 auto; background: rgba(255,255,255,.42); }
.ad-strip { margin: 8px auto 26px; width: min(620px, calc(100% - 30px)); border-radius: 8px; overflow: hidden; border: 1px solid rgba(121,196,240,.45); box-shadow: var(--shadow); }
.ad-strip img { width: 100%; aspect-ratio: 16/5.4; object-fit: cover; }
.content-box { border: 1px solid var(--line); border-radius: 18px; padding: 24px 22px; background: #303030; box-shadow: 0 0 0 1px rgba(121,196,240,.18), var(--shadow); }
.content-box h1, .content-box h2 { margin: 0 0 16px; font-size: clamp(28px, 4vw, 46px); line-height: 1.15; font-weight: 950; }
.content-box h2 { font-size: clamp(24px, 3vw, 34px); margin-top: 28px; }
.content-box p { margin: 0 0 16px; color: #f3f8fc; font-size: 18px; line-height: 1.85; }
.content-box strong { color: var(--cyan); }
.section { padding: 34px 0; background: var(--panel); }
.section-title { font-size: clamp(28px, 4vw, 44px); margin: 0 0 20px; font-weight: 950; text-align: center; }
.grid { display: grid; gap: 24px; }
.cat-grid { grid-template-columns: repeat(4, 1fr); }
.tile { background: #383838; border: 1px solid rgba(121,196,240,.36); border-radius: 12px; overflow: hidden; box-shadow: 0 12px 24px rgba(0,0,0,.18); }
.tile img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.tile-body { padding: 18px; }
.tile h3 { margin: 0 0 10px; font-size: 22px; color: var(--cyan); }
.tile p { margin: 0; color: var(--muted); line-height: 1.65; font-size: 15px; }
.read { display: inline-block; margin-top: 14px; color: #8fd9ff; font-weight: 950; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: center; }
.media-frame { border: 1px solid rgba(121,196,240,.45); border-radius: 12px; overflow: hidden; box-shadow: var(--shadow); background: var(--navy-dark); }
.media-frame img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.steps { display: grid; gap: 14px; }
.step { display: grid; grid-template-columns: 54px 1fr; align-items: center; gap: 16px; background: #373737; border: 1px solid rgba(121,196,240,.38); border-radius: 12px; padding: 16px; }
.num { width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center; background: #5db9ff; color: #fff; font-weight: 950; }
.step h3 { margin: 0 0 5px; color: var(--cyan); }
.step p { margin: 0; color: var(--muted); line-height: 1.55; }
.note { background: #244965; padding: 28px 0; border-top: 1px solid rgba(255,255,255,.08); }
.note p { margin: 0; font-size: 17px; line-height: 1.8; }
.note strong { color: var(--gold); }
.footer { background: #3c75b0; color: #fff; padding: 48px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 1.2fr 1fr 1.2fr; gap: 44px; }
.footer h3, .footer h4 { margin: 0 0 16px; font-size: 22px; }
.footer p, .footer a { color: #f0f8ff; line-height: 1.8; font-size: 15px; }
.footer a { display: block; margin: 8px 0; }
.copy { text-align: center; margin-top: 34px; padding-top: 18px; border-top: 1px solid rgba(255,255,255,.22); color: rgba(255,255,255,.76); font-size: 13px; }
.page-hero { background: #203f58; padding: 56px 0; border-top: 1px solid rgba(255,255,255,.06); }
.page-hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) 430px; gap: 34px; align-items: center; }
.page-hero h1 { margin: 0; font-size: clamp(38px, 5vw, 66px); line-height: 1.08; font-weight: 950; }
.page-hero p { color: #e6f5ff; font-size: 19px; line-height: 1.75; margin: 16px 0 0; }
.content-grid { display: grid; grid-template-columns: minmax(0,1fr) 300px; gap: 28px; align-items: start; }
.article { color: #f7fbff; font-size: 18px; line-height: 1.85; }
.article h2 { color: var(--cyan); font-size: 30px; margin: 30px 0 12px; }
.article h3 { color: var(--cyan); font-size: 23px; margin: 24px 0 10px; }
.article p { margin: 0 0 18px; }
.article ul, .article ol { padding-left: 26px; }
.article li { margin: 8px 0; }
.info-table { width: 100%; border-collapse: collapse; margin: 20px 0; border: 1px solid rgba(121,196,240,.45); }
.info-table th, .info-table td { border: 1px solid rgba(121,196,240,.45); padding: 12px 14px; text-align: left; vertical-align: top; }
.info-table th { background: #244965; color: var(--cyan); }
.side { position: sticky; top: 20px; background: #383838; border: 1px solid rgba(121,196,240,.4); border-radius: 12px; padding: 18px; }
.side h3 { margin: 0 0 12px; color: var(--cyan); }
.side a { display: block; padding: 10px 0; color: #dff5ff; border-top: 1px solid rgba(121,196,240,.22); font-weight: 850; }
.faq { display: grid; gap: 12px; }
.faq details { background: #383838; border: 1px solid rgba(121,196,240,.36); border-radius: 10px; padding: 15px 17px; }
.faq summary { cursor: pointer; color: var(--cyan); font-weight: 950; }
.faq p { margin: 10px 0 0; color: var(--muted); }
.dede-list { display: grid; gap: 18px; }
.pager { margin-top: 22px; }

@media (max-width: 980px) {
  .top-row { flex-direction: column; align-items: stretch; }
  .brand { justify-content: center; font-size: 32px; }
  .actions { justify-content: center; }
  .nav { justify-content: flex-start; gap: 18px; }
  .cards-row, .cat-grid { grid-template-columns: repeat(2, 1fr); }
  .split, .page-hero-grid, .content-grid, .footer-grid { grid-template-columns: 1fr; }
  .side { position: static; }
  .hero-banner img { height: auto; aspect-ratio: 16/7; }
}
@media (max-width: 560px) {
  .wrap { width: min(100% - 28px, 1080px); }
  .actions .btn { flex: 1; padding: 0 14px; }
  .nav { font-size: 14px; }
  .cards-row, .cat-grid { grid-template-columns: 1fr; }
  .ad-strip { width: calc(100% - 28px); }
}