/* ============================================================
   HVB — Hyper Vision Bangla | Premium Theme Layer v2
   এই ফাইলটি সব পেজের শেষে লোড হয় এবং পুরো সাইটের
   কালার, টাইপোগ্রাফি, কার্ড, বাটন ও ট্রাস্ট-লুক আপগ্রেড করে।
   ============================================================ */

:root{
  --bg:#05070D;
  --bg-2:#080B14;
  --surface:#0F1421;
  --surface-2:#161D2E;
  --line:#212A42;
  --line-soft:#1A2235;
  --text:#F2F6FF;
  --muted:#9AA5BF;
  --cyan:#4FE3C1;
  --violet:#9B8CFF;
  --gold:#FFB319;
  --grad:linear-gradient(100deg,#4FE3C1 0%,#5AC8FA 45%,#9B8CFF 100%);
  --grad-soft:linear-gradient(140deg,rgba(79,227,193,.14),rgba(155,140,255,.16));
  --ring:0 0 0 1px rgba(255,255,255,.06);
  --shadow-soft:0 18px 50px -24px rgba(0,0,0,.85);
  --shadow-glow:0 12px 40px -12px rgba(79,227,193,.35);
  --r:16px;
}

html{ scroll-behavior:smooth; }

body{
  background:
    radial-gradient(1100px 520px at 12% -8%, rgba(79,227,193,.10), transparent 60%),
    radial-gradient(900px 480px at 88% 2%, rgba(155,140,255,.13), transparent 60%),
    radial-gradient(700px 700px at 50% 110%, rgba(90,200,250,.07), transparent 60%),
    var(--bg) !important;
  color:var(--text);
  -webkit-font-smoothing:antialiased;
  letter-spacing:.005em;
}

::selection{ background:rgba(79,227,193,.28); color:#fff; }

/* ---------- HEADER / LOGO ---------- */
header{
  background:rgba(5,7,13,.72) !important;
  backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid var(--line-soft) !important;
  padding:12px 22px !important;
}
.brand img{
  width:42px !important; height:42px !important;
  border-radius:13px !important;
  padding:2px; background:var(--grad);
  box-shadow:0 6px 22px -8px rgba(79,227,193,.6);
  transition:transform .35s cubic-bezier(.2,.8,.2,1), box-shadow .35s;
}
.brand:hover img{ transform:rotate(-4deg) scale(1.06); box-shadow:0 10px 28px -8px rgba(155,140,255,.75); }
.brand-text b{
  font-size:1.22em !important; letter-spacing:.14em !important;
  color:var(--cyan); -webkit-text-fill-color:var(--cyan);
}
.brand-text span{ font-size:.62em !important; letter-spacing:.16em !important; color:var(--muted); }

nav .links a, .back-link{ position:relative; transition:color .2s; }
nav .links a::after{
  content:""; position:absolute; left:0; bottom:-5px; height:2px; width:0;
  background:var(--grad); border-radius:2px; transition:width .28s ease;
}
nav .links a:hover::after{ width:100%; }

/* ---------- BUTTONS ---------- */
.btn-primary, .buy-btn, .btn-ghost, button{
  font-family:'Hind Siliguri',sans-serif;
  transition:transform .2s cubic-bezier(.2,.8,.2,1), box-shadow .25s, background .25s, color .25s, border-color .25s;
}
.btn-primary{
  background:var(--grad) !important; color:#04070C !important;
  border-radius:12px !important; font-weight:700 !important;
  box-shadow:var(--shadow-glow); position:relative; overflow:hidden;
}
.btn-primary:hover{ transform:translateY(-2px); box-shadow:0 18px 44px -12px rgba(155,140,255,.55); }
.btn-primary:active{ transform:translateY(0); }
.btn-ghost{
  border-radius:12px !important; border:1px solid var(--line) !important;
  background:rgba(255,255,255,.03) !important; backdrop-filter:blur(6px);
}
.btn-ghost:hover{ border-color:var(--cyan) !important; color:var(--cyan) !important; transform:translateY(-2px); }
.buy-btn{
  border-radius:10px !important; border:1px solid rgba(79,227,193,.55) !important;
  background:rgba(79,227,193,.08) !important; color:var(--cyan) !important; font-weight:700 !important;
}
.buy-btn:hover{ background:var(--grad) !important; color:#04070C !important; border-color:transparent !important; }
.dots-btn{ border-radius:11px !important; background:rgba(255,255,255,.04) !important; }
.dots-menu{ border-radius:14px !important; box-shadow:var(--shadow-soft); }

/* ---------- HERO ---------- */
.hero{ padding-top:74px !important; }
.hero .eyebrow{
  background:rgba(255,255,255,.04) !important;
  border:1px solid var(--line) !important;
  border-radius:999px !important; letter-spacing:.04em;
  box-shadow:var(--ring);
}
.hero h1{
  font-size:clamp(2.05em,6.4vw,3.55em) !important;
  line-height:1.22 !important; letter-spacing:-.015em;
}
.hero h1 .grad-text{ background:none !important; -webkit-text-fill-color:currentColor !important; color:var(--cyan) !important; text-shadow:0 0 26px rgba(94,234,212,.35); }
.hero p.sub{ font-size:1.14em !important; max-width:620px !important; color:#B9C3D9 !important; }
.trust-row{ border-top:1px dashed var(--line) !important; }
.trust-row b{ color:var(--text); }

/* ---------- SECTION HEADINGS ---------- */
.section-head h2, .h{
  letter-spacing:-.01em;
}
.section-head h2{ font-size:2em !important; }
.section-head .tag{
  color:var(--cyan) !important; letter-spacing:.18em !important; text-transform:uppercase;
  font-size:.74em !important; font-weight:600;
}

/* ---------- CARDS ---------- */
.course-card, .why-item, .payment-strip, .buy-box, .lesson, .faq details, .card, .box{
  border-radius:var(--r) !important;
  border:1px solid var(--line) !important;
  background:linear-gradient(160deg,rgba(255,255,255,.045),rgba(255,255,255,.012)) , var(--surface) !important;
  box-shadow:var(--shadow-soft);
}
.course-card{ transition:transform .3s cubic-bezier(.2,.8,.2,1), border-color .3s, box-shadow .3s; }
.course-card:hover{
  transform:translateY(-6px);
  border-color:rgba(79,227,193,.5) !important;
  box-shadow:0 26px 60px -22px rgba(79,227,193,.35);
}
.course-thumb{
  height:170px !important;
  background:
    radial-gradient(circle at 30% 25%, rgba(79,227,193,.22), transparent 55%),
    radial-gradient(circle at 75% 70%, rgba(155,140,255,.24), transparent 55%),
    var(--surface-2) !important;
}
.course-thumb::after{
  content:""; position:absolute; inset:0;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:26px 26px; opacity:.5;
}
.course-thumb .play{
  width:58px !important; height:58px !important; z-index:2;
  background:rgba(255,255,255,.10) !important;
  box-shadow:0 0 0 8px rgba(79,227,193,.10), 0 10px 30px -8px rgba(0,0,0,.7);
}
.course-card:hover .play{ background:var(--grad) !important; color:#04070C !important; }
.course-body{ padding:20px !important; }
.course-body h3{ font-family:'Sora',sans-serif; font-size:1.18em !important; }
.course-body .badge, .badge{ letter-spacing:.1em !important; }
.price{
  font-family:'Sora',sans-serif !important;
  font-size:1.45em !important;
  font-weight:900 !important;
  white-space:nowrap !important;
  flex-shrink:0 !important;
  display:inline-flex !important;
  align-items:baseline !important;
  gap:3px !important;
  color:#FFB319 !important;
  background:linear-gradient(135deg, #FFE066 0%, #F59E0B 55%, #D97706 100%) !important;
  -webkit-background-clip:text !important;
  -webkit-text-fill-color:transparent !important;
  filter:drop-shadow(0 2px 10px rgba(245,158,11,0.5)) !important;
  letter-spacing:0.3px !important;
}
.price small, .price s{
  -webkit-text-fill-color:var(--muted) !important;
  color:var(--muted) !important;
  font-size:0.58em !important;
  font-weight:500 !important;
  filter:none !important;
  text-decoration:line-through;
  margin-left:4px;
}
.why-item{ transition:transform .3s, border-color .3s; }
.why-item:hover{ transform:translateY(-4px); border-color:rgba(155,140,255,.45) !important; }
.why-item .icon{
  width:44px !important; height:44px !important; border-radius:13px !important;
  box-shadow:0 8px 22px -10px rgba(79,227,193,.7);
}
.why-item h4{ font-family:'Sora',sans-serif; }

.pill{
  border-radius:999px !important;
  background:rgba(255,255,255,.045) !important;
  border:1px solid var(--line) !important; color:#C7D0E4 !important; font-weight:600;
}

.lesson{ padding:14px 16px !important; margin-bottom:10px; transition:border-color .25s, transform .25s; }
.lesson:hover{ border-color:rgba(79,227,193,.45) !important; transform:translateX(4px); }
.lesson .num{ color:var(--cyan) !important; }
.checklist div{ position:relative; }
.faq details summary{ cursor:pointer; font-weight:600; }

/* ---------- MARQUEE ---------- */
.hvb-marquee{
  background:linear-gradient(90deg,rgba(79,227,193,.16),rgba(90,200,250,.12),rgba(155,140,255,.18)) !important;
  border-bottom:1px solid var(--line-soft) !important;
}

/* ---------- FOOTER ---------- */
footer{ border-top:1px solid var(--line-soft) !important; padding:44px 24px 34px !important; }
.social-row a{
  border-radius:12px !important; width:42px !important; height:42px !important;
  background:rgba(255,255,255,.035); font-weight:700; letter-spacing:.04em;
  transition:transform .25s, background .25s, color .25s, border-color .25s;
}
.social-row a:hover{ transform:translateY(-3px); background:var(--grad); color:#04070C !important; border-color:transparent !important; }

/* ---------- HVB শেয়ার্ড নতুন কম্পোনেন্ট ---------- */
.hvb-stats{
  display:grid; grid-template-columns:repeat(auto-fit,minmax(150px,1fr)); gap:14px;
  max-width:1080px; margin:0 auto; padding:0 24px 12px;
}
.hvb-stat{
  border:1px solid var(--line); border-radius:var(--r); padding:20px 18px; text-align:center;
  background:linear-gradient(160deg,rgba(255,255,255,.05),rgba(255,255,255,.012));
  box-shadow:var(--shadow-soft);
}
.hvb-stat b{
  display:block; font-family:'Sora',sans-serif; font-size:1.75em; line-height:1.1;
  color:var(--cyan); -webkit-text-fill-color:var(--cyan);
}
.hvb-stat span{ font-size:.86em; color:var(--muted); }

.hvb-support{
  max-width:1080px; margin:0 auto; padding:0 24px;
}
.hvb-support-box{
  border:1px solid rgba(79,227,193,.35); border-radius:var(--r); padding:26px;
  background:
    radial-gradient(600px 200px at 10% 0%, rgba(79,227,193,.14), transparent 70%),
    var(--surface);
  box-shadow:var(--shadow-soft);
}
.hvb-support-box h4{ font-family:'Sora',sans-serif; font-size:1.12em; margin-bottom:8px; }
.hvb-support-box p{ color:var(--muted); font-size:.94em; }
.hvb-badge-row{ display:flex; gap:10px; flex-wrap:wrap; margin-top:14px; }
.hvb-badge{
  display:inline-flex; align-items:center; gap:7px; font-size:.84em; font-weight:600;
  padding:8px 14px; border-radius:999px; color:#0A0D14; background:var(--grad);
}
.hvb-badge.outline{ background:rgba(255,255,255,.04); color:#C7D0E4; border:1px solid var(--line); }

.hvb-idlist{ display:grid; grid-template-columns:repeat(auto-fit,minmax(230px,1fr)); gap:14px; }
.hvb-idcard{
  display:flex; align-items:center; gap:12px; padding:16px;
  border:1px solid var(--line); border-radius:var(--r); background:var(--surface);
  transition:transform .25s, border-color .25s;
}
.hvb-idcard:hover{ transform:translateY(-3px); border-color:rgba(155,140,255,.5); }
.hvb-idcard i{
  width:40px; height:40px; border-radius:12px; display:flex; align-items:center; justify-content:center;
  background:var(--grad-soft); border:1px solid var(--line); font-style:normal; font-size:1.05em;
}
.hvb-idcard b{ display:block; font-size:.96em; }
.hvb-idcard small{ color:var(--muted); font-size:.8em; }

.hvb-reviews-soon{
  text-align:center; border:1px dashed var(--line); border-radius:var(--r);
  padding:30px 22px; background:rgba(255,255,255,.02);
}
.hvb-reviews-soon b{ display:block; font-family:'Sora',sans-serif; margin-bottom:6px; }
.hvb-reviews-soon p{ color:var(--muted); font-size:.9em; }

/* ---------- MOTION ---------- */
@keyframes hvbFadeUp{ from{ opacity:0; transform:translateY(16px);} to{ opacity:1; transform:none;} }
.hero, section, .wrap > *{ animation:hvbFadeUp .6s cubic-bezier(.2,.8,.2,1) both; }
@media (prefers-reduced-motion:reduce){
  *{ animation:none !important; transition:none !important; }
}

@media (max-width:640px){
  .brand-text b{ font-size:1.05em !important; }
  .hero h1{ font-size:2.05em !important; }
  .hvb-stat b{ font-size:1.45em; }
}


/* ===== Messenger float + contact + policy (v3) ===== */
.hvb-msgr-float{
  position:fixed; right:18px; bottom:18px; z-index:60;
  display:flex; align-items:center; gap:9px;
  padding:12px 18px; border-radius:999px;
  background:linear-gradient(90deg,#00B2FF,#006AFF);
  color:#fff !important; -webkit-text-fill-color:#fff;
  font-weight:700; font-size:0.92em; text-decoration:none;
  box-shadow:0 10px 30px rgba(0,106,255,.45);
  transition:transform .18s ease, box-shadow .18s ease;
}
.hvb-msgr-float:hover{ transform:translateY(-3px); box-shadow:0 14px 38px rgba(0,106,255,.6); }
.hvb-msgr-float i{ font-style:normal; font-size:1.15em; }
@media (max-width:640px){
  .hvb-msgr-float{ right:12px; bottom:12px; padding:11px 15px; font-size:0.85em; }
}

.hvb-contact-grid{
  display:grid; grid-template-columns:repeat(auto-fit,minmax(240px,1fr)); gap:16px;
}
.hvb-contact-card{
  display:flex; gap:14px; align-items:flex-start;
  background:var(--surface,#131826); border:1px solid var(--line,#242C42);
  border-radius:14px; padding:20px; transition:border-color .2s, transform .2s;
}
.hvb-contact-card:hover{ border-color:var(--cyan,#5EEAD4); transform:translateY(-2px); }
.hvb-contact-card i{ font-style:normal; font-size:1.5em; line-height:1; }
.hvb-contact-card b{ display:block; color:var(--text,#EAF0FF); -webkit-text-fill-color:currentColor; font-size:1em; }
.hvb-contact-card small{ display:block; color:var(--muted,#8891A8); font-size:0.86em; margin-top:5px; }

.hvb-policy-box{
  background:var(--surface,#131826); border:1px solid var(--line,#242C42);
  border-left:3px solid var(--cyan,#5EEAD4);
  border-radius:14px; padding:22px 24px; max-width:760px; margin:0 auto;
}
.hvb-policy-box h4{ font-size:1.05em; margin-bottom:10px; color:var(--text,#EAF0FF); -webkit-text-fill-color:currentColor; }
.hvb-policy-box p{ color:var(--muted,#8891A8); font-size:0.92em; margin-bottom:8px; }
.hvb-policy-box ul{ color:var(--muted,#8891A8); font-size:0.92em; padding-left:20px; margin-top:6px; }
.hvb-policy-box li{ margin-bottom:6px; }

/* ===== v4: scroll reveal, footer grid, page hero, tutorial CTA ===== */
.hvb-reveal{ opacity:0; transform:translateY(26px); transition:opacity .7s cubic-bezier(.22,.61,.36,1), transform .7s cubic-bezier(.22,.61,.36,1); will-change:opacity,transform; }
.hvb-reveal.is-in{ opacity:1; transform:none; }
.hvb-reveal.d1{ transition-delay:.08s; } .hvb-reveal.d2{ transition-delay:.16s; } .hvb-reveal.d3{ transition-delay:.24s; }
@media (prefers-reduced-motion:reduce){ .hvb-reveal{ opacity:1 !important; transform:none !important; } }

.hvb-foot{
  border-top:1px solid var(--line,#242C42);
  padding:52px 24px 28px; max-width:1080px; margin:0 auto;
}
.hvb-foot-grid{ display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:32px; }
@media (max-width:820px){ .hvb-foot-grid{ grid-template-columns:1fr 1fr; gap:26px; } }
@media (max-width:460px){ .hvb-foot-grid{ grid-template-columns:1fr 1fr; } }
.hvb-foot h5{ font-size:.78em; letter-spacing:.12em; text-transform:uppercase; color:var(--muted,#8891A8); margin-bottom:12px; }
.hvb-foot ul{ list-style:none; display:flex; flex-direction:column; gap:9px; }
.hvb-foot a{ color:var(--muted,#8891A8); font-size:.92em; }
.hvb-foot a:hover{ color:var(--cyan,#5EEAD4); }
.hvb-foot-about p{ color:var(--muted,#8891A8); font-size:.9em; margin-top:12px; max-width:320px; }
.hvb-foot-bottom{
  margin-top:34px; padding-top:18px; border-top:1px solid var(--line,#242C42);
  display:flex; justify-content:space-between; gap:14px; flex-wrap:wrap;
  color:var(--muted,#8891A8); font-size:.82em;
}

.hvb-pagehero{ max-width:820px; margin:0 auto; padding:70px 24px 16px; text-align:center; }
.hvb-pagehero span.tag{ color:var(--cyan,#5EEAD4); font-size:.82em; letter-spacing:.08em; }
.hvb-pagehero h1{ font-family:'Sora',sans-serif; font-size:clamp(1.7em,4.4vw,2.4em); margin:10px 0 12px; }
.hvb-pagehero p{ color:var(--muted,#8891A8); font-size:1.02em; }

.hvb-tut-cta{
  max-width:1080px; margin:22px auto 0; padding:0 24px;
}
.hvb-tut-cta a{
  display:flex; align-items:center; justify-content:space-between; gap:16px; flex-wrap:wrap;
  background:linear-gradient(90deg, rgba(94,234,212,.10), rgba(167,139,250,.12));
  border:1px solid var(--line,#242C42); border-left:3px solid var(--cyan,#5EEAD4);
  border-radius:14px; padding:18px 22px; transition:transform .2s, border-color .2s;
}
.hvb-tut-cta a:hover{ transform:translateY(-2px); border-color:var(--cyan,#5EEAD4); }
.hvb-tut-cta b{ display:block; font-size:1.02em; }
.hvb-tut-cta small{ color:var(--muted,#8891A8); }
.hvb-tut-cta em{ font-style:normal; font-weight:700; color:var(--cyan,#5EEAD4); -webkit-text-fill-color:currentColor; white-space:nowrap; }

/* HVB course preview poster */
.hvb-poster{
  position:relative; border-radius:18px; overflow:hidden;
  border:1px solid rgba(120,200,255,.22);
  background:
    radial-gradient(120% 120% at 10% 0%, rgba(34,211,238,.18), transparent 60%),
    radial-gradient(100% 120% at 90% 100%, rgba(139,92,246,.20), transparent 60%),
    linear-gradient(160deg, #0b1220, #0a1a2b 60%, #0b1220);
  padding:30px 24px; text-align:center; margin:20px 0 8px;
  box-shadow:0 20px 50px rgba(2,10,25,.45);
}
.hvb-poster::after{
  content:""; position:absolute; inset:0; pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size:38px 38px; opacity:.5;
}
.hvb-poster .p-kicker{
  display:inline-block; font-size:.72em; letter-spacing:.16em; text-transform:uppercase;
  color:#7dd3fc; border:1px solid rgba(125,211,252,.35); border-radius:999px; padding:5px 12px;
}
.hvb-poster .p-title{
  font-family:'Sora',sans-serif; font-weight:700; font-size:1.5em; margin:14px 0 8px; color:#eaf6ff;
  position:relative; z-index:1;
}
.hvb-poster .p-sub{ color:#9fb6cc; font-size:.92em; max-width:520px; margin:0 auto; position:relative; z-index:1; }
.hvb-poster .p-chips{ display:flex; flex-wrap:wrap; gap:8px; justify-content:center; margin-top:18px; position:relative; z-index:1; }
.hvb-poster .p-chips span{
  font-size:.82em; color:#d7ecff; background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.10); border-radius:999px; padding:7px 13px;
}
.hvb-poster .p-play{
  width:60px; height:60px; margin:0 auto 4px; border-radius:50%;
  display:flex; align-items:center; justify-content:center; font-size:1.2em; color:#031018;
  background:linear-gradient(135deg,#22d3ee,#818cf8); box-shadow:0 0 0 8px rgba(34,211,238,.10);
  position:relative; z-index:1;
}
@media(max-width:520px){ .hvb-poster{ padding:24px 16px; } .hvb-poster .p-title{ font-size:1.2em; } }