/* Radiokotha.com - Banglabet review site
   Palette: deep teal + amber accents (distinct from BB gold/black) */
:root{
  --bg:#0b1620;
  --bg-2:#122436;
  --bg-3:#173049;
  --card:#152a3f;
  --line:#1f3a55;
  --text:#e9f1f7;
  --muted:#a9becf;
  --accent:#f2a413;
  --accent-2:#ffcf5c;
  --brand:#12a89d;
  --brand-2:#0d7d75;
  --danger:#e64c4c;
  --success:#3ecf8e;
  --radius:14px;
  --shadow:0 10px 30px rgba(0,0,0,.35);
  --container:1180px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:'Inter','Segoe UI',system-ui,-apple-system,'Hind Siliguri',Roboto,Arial,sans-serif;
  background:linear-gradient(180deg,#08111a 0%, #0b1620 40%);
  color:var(--text);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
body.bn{font-family:'Hind Siliguri','Noto Sans Bengali','Inter',Arial,sans-serif}
a{color:var(--accent);text-decoration:none;transition:color .18s}
a:hover{color:var(--accent-2)}
img{max-width:100%;height:auto;display:block}
h1,h2,h3,h4{font-family:'Playfair Display','Merriweather',Georgia,serif;line-height:1.25;margin:0 0 .6em;color:#fff;letter-spacing:.2px}
body.bn h1, body.bn h2, body.bn h3, body.bn h4{font-family:'Hind Siliguri','Noto Sans Bengali',serif}
h1{font-size:clamp(1.7rem,3.4vw,2.6rem)}
h2{font-size:clamp(1.4rem,2.6vw,2rem)}
h3{font-size:clamp(1.15rem,2vw,1.4rem)}
p{margin:0 0 1em}
.container{max-width:var(--container);margin:0 auto;padding:0 20px}
section{padding:56px 0}
section.tight{padding:36px 0}

/* ---- Top bar ---- */
.topbar{background:#050d15;color:#8ea6bb;font-size:.85rem}
.topbar .row{display:flex;justify-content:space-between;align-items:center;padding:8px 0;gap:10px;flex-wrap:wrap}
.topbar .contact a{color:#8ea6bb}
.topbar .contact a:hover{color:var(--accent-2)}

/* ---- Header ---- */
.site-header{
  background:linear-gradient(180deg,#0d1c2b 0%,#0b1620 100%);
  border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:60;
}
.site-header .row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 0}
.logo{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:1.25rem}
.logo-mark{
  width:38px;height:38px;border-radius:10px;
  background:conic-gradient(from 140deg,var(--accent) 0deg,var(--brand) 180deg,var(--accent) 360deg);
  display:grid;place-items:center;color:#0b1620;font-weight:800;box-shadow:0 6px 16px rgba(242,164,19,.35)
}
.logo strong{color:var(--accent-2)}
.header-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.lang{display:flex;gap:4px;background:#0a1622;border:1px solid var(--line);border-radius:999px;padding:4px}
.lang a{padding:6px 12px;border-radius:999px;color:#cfe0ef;font-size:.85rem;font-weight:600}
.lang a.active{background:var(--accent);color:#0b1620}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:999px;font-weight:700;font-size:.95rem;
  border:0;cursor:pointer;transition:transform .15s ease, box-shadow .15s ease, background .15s ease
}
.btn-primary{background:linear-gradient(180deg,var(--accent-2),var(--accent));color:#221100;box-shadow:0 6px 18px rgba(242,164,19,.35)}
.btn-primary:hover{transform:translateY(-1px);color:#221100}
.btn-outline{background:transparent;color:#e9f1f7;border:1px solid var(--line)}
.btn-outline:hover{border-color:var(--accent);color:var(--accent)}
.btn-brand{background:linear-gradient(180deg,#1cc2b6,var(--brand));color:#04211e}
.btn-brand:hover{transform:translateY(-1px);color:#04211e}
.btn-block{display:flex;width:100%}

/* ---- Primary nav ---- */
.mainnav{background:#0a1521;border-bottom:1px solid var(--line)}
.mainnav ul{list-style:none;margin:0;padding:0;display:flex;gap:6px;overflow-x:auto;scrollbar-width:none}
.mainnav ul::-webkit-scrollbar{display:none}
.mainnav a{
  display:block;color:#cfe0ef;font-weight:600;font-size:.92rem;
  padding:14px 14px;white-space:nowrap;border-bottom:2px solid transparent
}
.mainnav a:hover, .mainnav a.active{color:var(--accent);border-color:var(--accent)}

/* ---- Hero ---- */
.hero{
  position:relative;overflow:hidden;
  background:
    radial-gradient(1200px 400px at 80% -10%, rgba(242,164,19,.18), transparent 60%),
    radial-gradient(800px 300px at 10% 110%, rgba(18,168,157,.18), transparent 60%),
    linear-gradient(180deg,#0d1e2f, #0b1620);
  padding:70px 0 90px;
}
.hero-grid{display:grid;grid-template-columns:1.15fr 1fr;gap:40px;align-items:center}
.hero .eyebrow{display:inline-block;background:rgba(242,164,19,.12);color:var(--accent-2);border:1px solid rgba(242,164,19,.35);border-radius:999px;padding:5px 12px;font-size:.78rem;font-weight:700;letter-spacing:.6px;text-transform:uppercase;margin-bottom:14px}
.hero h1{font-size:clamp(2rem,4vw,3.2rem)}
.hero .lead{color:#cfe0ef;font-size:1.08rem;max-width:600px}
.hero-ctas{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
.hero-trust{display:flex;gap:22px;margin-top:26px;flex-wrap:wrap;color:#a9becf;font-size:.9rem}
.hero-trust b{color:#fff;display:block;font-size:1.15rem;font-family:'Playfair Display',serif}
.hero-visual{
  position:relative;
  border-radius:20px;overflow:hidden;
  border:1px solid var(--line);
  background:linear-gradient(180deg,#122436,#0a1621);
  box-shadow:var(--shadow);
  aspect-ratio: 4/3;
}
.hero-visual svg{width:100%;height:100%;display:block}

/* ---- Section headings ---- */
.section-head{text-align:center;max-width:760px;margin:0 auto 34px}
.section-head .eyebrow{color:var(--accent);font-weight:800;letter-spacing:.14em;text-transform:uppercase;font-size:.78rem;display:block;margin-bottom:8px}
.section-head p{color:var(--muted);margin-top:6px}

/* ---- Cards / grids ---- */
.grid{display:grid;gap:18px}
.grid.g-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid.g-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid.g-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.card{
  background:linear-gradient(180deg,#152a3f,#0f2033);
  border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;transition:transform .15s ease, border-color .15s ease
}
.card:hover{transform:translateY(-3px);border-color:rgba(242,164,19,.45)}
.card .icon{width:56px;height:56px;border-radius:12px;background:rgba(18,168,157,.12);display:grid;place-items:center;margin-bottom:14px}
.card h3{margin-bottom:6px}
.card p{color:var(--muted);font-size:.95rem;margin-bottom:0}

/* ---- Bonus cards ---- */
.bonus-card{
  display:flex;flex-direction:column;background:#122234;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;
}
.bonus-card .bonus-media{
  aspect-ratio: 16/8;
  background:linear-gradient(135deg,#173049,#0d1e2f);
  position:relative;overflow:hidden;
  display:flex;align-items:center;justify-content:center;
  color:#fff;
}
.bonus-card .bonus-media .amount{
  font-family:'Playfair Display',serif;font-size:2.4rem;color:var(--accent-2);text-shadow:0 3px 12px rgba(0,0,0,.55)
}
.bonus-card .bonus-body{padding:18px 20px 22px}
.bonus-card .bonus-body h3{font-size:1.1rem;margin-bottom:6px}
.bonus-card .bonus-body p{color:var(--muted);font-size:.9rem;margin-bottom:14px}
.bonus-tag{display:inline-block;background:rgba(62,207,142,.12);color:var(--success);border:1px solid rgba(62,207,142,.3);padding:3px 10px;border-radius:999px;font-size:.75rem;font-weight:700;margin-bottom:10px}

/* ---- Feature icons row ---- */
.feature-row{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.feature-row .card{text-align:center}
.feature-row .icon img{width:48px;height:48px;object-fit:contain;filter:drop-shadow(0 4px 8px rgba(0,0,0,.4))}

/* ---- Steps ---- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;counter-reset:step}
.step{
  background:linear-gradient(180deg,#132537,#0e1e2e);
  border:1px solid var(--line);border-radius:var(--radius);padding:22px;position:relative
}
.step:before{
  content:counter(step,decimal-leading-zero);counter-increment:step;
  position:absolute;top:-16px;left:20px;background:var(--accent);color:#0b1620;
  font-weight:800;font-size:.9rem;padding:6px 12px;border-radius:999px
}
.step h4{margin:8px 0 4px;font-size:1.05rem}
.step p{color:var(--muted);font-size:.9rem;margin:0}

/* ---- Payment icons ---- */
.pay-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:14px}
.pay-item{
  background:#fff;border-radius:12px;padding:14px;display:flex;align-items:center;justify-content:center;
  color:#0b1620;font-weight:800;text-align:center;min-height:70px;border:1px solid #dfe6ee;
}
.pay-item.bkash{background:linear-gradient(135deg,#e2136e,#a80f52);color:#fff}
.pay-item.nagad{background:linear-gradient(135deg,#ef4123,#c02b13);color:#fff}
.pay-item.rocket{background:linear-gradient(135deg,#8c258f,#5c1660);color:#fff}
.pay-item.upay{background:linear-gradient(135deg,#f7931e,#c76b09);color:#fff}
.pay-item.bank{background:linear-gradient(135deg,#0e6f6b,#0a4b48);color:#fff}
.pay-item.usdt{background:linear-gradient(135deg,#26a17b,#1a6d54);color:#fff}
.pay-item small{display:block;font-weight:500;font-size:.7rem;opacity:.85}

/* ---- App section ---- */
.app-section{background:linear-gradient(180deg,#0c1a29 0%, #0a1523 100%);position:relative;overflow:hidden}
.app-grid{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:center}
.app-visual{position:relative;text-align:center}
.app-visual img{max-width:340px;margin:0 auto;filter:drop-shadow(0 20px 40px rgba(0,0,0,.6))}
.app-specs{
  background:#122234;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;margin-top:22px
}
.app-specs table{width:100%;border-collapse:collapse}
.app-specs td{padding:10px 4px;border-bottom:1px dashed var(--line);color:var(--muted);font-size:.9rem}
.app-specs td:first-child{color:#fff;font-weight:600;width:45%}
.app-specs tr:last-child td{border-bottom:0}
.qr-block{display:flex;gap:20px;align-items:center;background:#122234;border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin-top:16px}
.qr-block img{width:110px;height:110px;background:#fff;padding:8px;border-radius:10px}

/* ---- Table ---- */
.table-wrap{overflow-x:auto;background:#122234;border:1px solid var(--line);border-radius:var(--radius)}
.info-table{width:100%;border-collapse:collapse;min-width:600px}
.info-table th, .info-table td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
.info-table th{background:#0f2033;color:var(--accent-2);font-weight:700;font-size:.9rem;letter-spacing:.05em;text-transform:uppercase}
.info-table td{color:#cfe0ef}
.info-table tr:last-child td{border-bottom:0}
.info-table td:first-child{color:#fff;font-weight:600;width:30%}

/* ---- Blog ---- */
.blog-card{background:#122234;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column}
.blog-media{aspect-ratio:16/9;background:linear-gradient(135deg,#1a2f45,#0d1c2b);position:relative;overflow:hidden}
.blog-media svg{width:100%;height:100%}
.blog-body{padding:18px 20px 20px;flex:1;display:flex;flex-direction:column}
.blog-body h3{font-size:1.08rem;margin-bottom:8px}
.blog-body p{color:var(--muted);font-size:.9rem;flex:1}
.blog-body .meta{color:#7c95ab;font-size:.78rem;margin-bottom:6px;letter-spacing:.05em;text-transform:uppercase}

/* ---- FAQ ---- */
.faq{max-width:900px;margin:0 auto}
.faq details{
  background:#122234;border:1px solid var(--line);border-radius:12px;
  padding:16px 20px;margin-bottom:10px;transition:border-color .15s
}
.faq details[open]{border-color:rgba(242,164,19,.5)}
.faq summary{
  list-style:none;cursor:pointer;font-weight:700;color:#fff;
  display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:1.02rem
}
.faq summary::-webkit-details-marker{display:none}
.faq summary:after{
  content:"+";color:var(--accent);font-size:1.5rem;font-weight:700;transition:transform .2s
}
.faq details[open] summary:after{content:"−"}
.faq details p{margin-top:12px;color:var(--muted)}

/* ---- Providers ---- */
.providers{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}
.providers .p-badge{
  background:#122234;border:1px solid var(--line);border-radius:10px;
  padding:14px 22px;color:#cfe0ef;font-weight:700;font-size:.9rem;
  min-width:140px;text-align:center;letter-spacing:.03em
}

/* ---- CTA banner ---- */
.cta-strip{
  background:linear-gradient(90deg,#0e7d75 0%,#12a89d 100%);
  color:#04211e;border-radius:20px;padding:36px;
  display:flex;align-items:center;justify-content:space-between;gap:22px;flex-wrap:wrap
}
.cta-strip h2{color:#04211e;margin:0}
.cta-strip p{color:#0b3f3a;margin:6px 0 0;font-weight:500}

/* ---- Prose block ---- */
.prose{max-width:900px;margin:0 auto;color:#d3e2ef}
.prose h2{text-align:left}
.prose p{color:#cfe0ef}
.prose ul{padding-left:22px;color:#cfe0ef}
.prose ul li{margin:6px 0}

/* ---- Footer ---- */
.site-footer{background:#050d15;padding:50px 0 20px;color:#8ea6bb;border-top:1px solid var(--line);margin-top:40px}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:26px}
.foot-grid h4{color:#fff;font-size:1rem;margin-bottom:14px}
.foot-grid ul{list-style:none;margin:0;padding:0}
.foot-grid ul li{margin-bottom:8px}
.foot-grid ul a{color:#a9becf}
.foot-grid ul a:hover{color:var(--accent)}
.foot-license{background:#0a1521;border:1px solid var(--line);border-radius:10px;padding:14px;margin-top:16px;font-size:.82rem;color:#a9becf}
.foot-bottom{border-top:1px solid #0f2033;margin-top:30px;padding-top:16px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:.82rem;color:#7c95ab}
.foot-badge{display:inline-flex;gap:8px;align-items:center;background:#0a1521;border:1px solid var(--line);border-radius:10px;padding:8px 12px;font-size:.82rem}

/* ---- Responsive ---- */
@media (max-width: 960px){
  .hero-grid{grid-template-columns:1fr}
  .hero-visual{max-width:520px;margin:0 auto}
  .grid.g-4{grid-template-columns:repeat(2,1fr)}
  .grid.g-3{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .app-grid{grid-template-columns:1fr}
  .app-visual img{max-width:280px}
  .pay-grid{grid-template-columns:repeat(3,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr}
  .feature-row{grid-template-columns:1fr}
}
@media (max-width: 560px){
  section{padding:40px 0}
  .grid.g-2{grid-template-columns:1fr}
  .grid.g-3{grid-template-columns:1fr}
  .grid.g-4{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr}
  .pay-grid{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr}
  .cta-strip{padding:24px;text-align:center;justify-content:center}
  .hero{padding:44px 0 56px}
  .site-header .row{flex-wrap:wrap}
  .logo{font-size:1.1rem}
  .btn{padding:10px 16px;font-size:.9rem}
  .header-actions .btn-outline{display:none}
}

/* Smooth in-page nav */
html{scroll-behavior:smooth;scroll-padding-top:70px}

/* Skip link */
.skip{position:absolute;left:-9999px;top:auto}
.skip:focus{position:fixed;top:10px;left:10px;background:var(--accent);color:#000;padding:10px 14px;border-radius:8px;z-index:100}