/* Variables */
        :root{
            --bg:#050507;
            --panel:#7ea9ff;
            --muted:#a8a8b3;
            --accent-1: #3f6efb;
            --accent-2: #6a8dff;
            --glass: rgba(255, 255, 255, 0.04);
            --card-shadow: 0 10px 30px rgba(2,6,23,0.6);
            --radius: 12px;
            --container-max:1100px;
            --nav-height: 72px; /* fallback; updated at runtime */
        }

        html {
            scroll-behavior: smooth;
        }

        /* Reset & base */
        *,*::before,*::after{box-sizing:border-box}
        html,body{height:100%}
        body{
            margin:0;
            font-family:"Poppins",system-ui,-apple-system,Segoe UI,Roboto,"Helvetica Neue",Arial;
            background:linear-gradient(180deg,#020204 0%, #000000 50%), radial-gradient(800px 400px at 10% 10%, rgba(63,110,251,0.06), transparent 10%), radial-gradient(800px 500px at 90% 90%, rgba(106,141,255,0.03), transparent 8%);
            color:#eef0f6;
            -webkit-font-smoothing:antialiased;
            -moz-osx-font-smoothing:grayscale;
            line-height:1.45;
            -webkit-text-size-adjust:100%;
            -webkit-font-variant-ligatures: contextual;
            font-variant-ligatures: contextual;
            padding-top: var(--nav-height); /* reserve space for fixed navbar */
        }

        /* Make images responsive by default */
        img{max-width:100%;height:auto;display:block}

        /* Layout container */
.container{
  max-width:var(--container-max);
  margin:0 auto;
  padding:0 20px;
  width:100%;
}

/* Navbar - full width fixed bar + inner centered container */
.navbar {
  position: fixed;
  top: 20px;
  left: 0;
  right: 0;
  z-index: 9999;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.03);
}
.navbar-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 18px;
  max-width: var(--container-max);
  margin: 0 auto;
  width: 100%;
  border-radius: 12px;
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  box-shadow: 0 8px 28px rgba(6,8,13,0.6);
  border: 1px solid rgba(255,255,255,0.03);
}

.logo{
  display:flex;
  gap:12px;
  align-items:center;
  font-weight:700;
  letter-spacing:0.6px;
  color:#fff;
  font-size:16px;
  text-decoration: none;
}
/* Logo image responsive */
.logo img {
  width: clamp(24px, 4vw, 36px); /* min 24px, preferred 4% viewport, max 36px */
  height: auto; /* auto height proportion maintain করবে */
  border-radius: 8px;
  object-fit: cover;
}

/* Logo text responsive */
#logo-text {
  font-size: clamp(12px, 4vw, 16px); /* min 12px, preferred 4% viewport, max 16px */
  font-weight: 700;
  color: #fff;
  flex-shrink: 0; /* shrink না হয় */
  white-space: nowrap; /* এক লাইনে থাকে */
}


/* Nav menu */
.menu{
  display:flex;
  gap:22px;
  align-items:center;
}
.menu a{
  color:var(--muted);
  text-decoration:none;
  font-weight:600;
  font-size:14px;
  transition:color .18s, transform .12s;
}
.menu a:hover{color:var(--accent-1); transform:translateY(-2px)}

/* Responsive styles */
@media (max-width: 768px) {
  /* Mobile menu hidden by default */
  .menu {
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 16px;
    padding: 20px;
    background: rgba(30, 60, 150, 0.95); /* blue background */
    border-radius: 0 0 12px 12px;
    box-shadow: 0 8px 28px rgba(0,0,0,0.4);
    display: none;
  }
  .menu.mobile-open {
    display: flex;
  }

  /* Mobile menu links */
  .menu a {
    background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    padding: 12px;
    border-radius: 8px;
    text-align: center;
    transition: background 0.25s, transform 0.15s;
  }
  .menu a:hover {
    background: linear-gradient(90deg, #365edb, #567eff);
    transform: translateY(-2px);
  }

  /* Toggle button visible only in mobile */
  .nav-toggle {
    display: block;
    background: var(--accent-1);
    color: #fff;
    font-size: 20px;
    border: none;
    border-radius: 8px;
    padding: 8px 12px;
    cursor: pointer;
    transition: background 0.2s;
  }
  .nav-toggle:hover {
    background: var(--accent-2);
  }
}

/* Settings Icon ঘোরানো */
.settings-btn {
  animation: spin 4s linear infinite;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
@keyframes spin {
  0%   { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}
/* Ensure logo text always visible in mobile */
#logo-text {
  display: inline-block;
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  flex-shrink: 0;
}

/* Responsive button */
.btn {
  background: linear-gradient(90deg,var(--accent-1),var(--accent-2));
  color: #fff;
  padding: clamp(6px, 2vw, 12px) clamp(12px, 3vw, 22px);
  font-size: clamp(10px, 2.5vw, 16px);
  border-radius: 10px;
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 8px 30px rgba(63,110,251,0.18);
  border: none;
  display: inline-block;
  text-align: center;
  white-space: nowrap; /* যাতে এক লাইনে থাকে */
}

.btn:active { transform: translateY(1px); }
.btn:focus { outline: 2px solid rgba(106,141,255,0.18); outline-offset: 3px; }


.nav-toggle{
  display:none;
  background:transparent;
  border:none;
  color:var(--muted);
  font-size:20px;
  cursor:pointer;
  padding:8px;
  border-radius:8px;
}
.nav-toggle:focus{outline:2px solid rgba(106,141,255,0.18);outline-offset:3px}

/* Typography auto scale (all devices) */
h1 { font-size: clamp(22px, 6vw, 40px); }
h2 { font-size: clamp(18px, 4.5vw, 28px); }
p  { font-size: clamp(14px, 3.5vw, 18px); }


        /* Hero Section */
    .hero {
      min-height: 60vh;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      padding: 0 1rem;
      background: radial-gradient(circle at bottom, #0b0b2a 0%, #000 80%);
    }

    .hero-content {
      max-width: 850px;
    }

    .hero h1 {
      font-size: 3rem;
      font-weight: 700;
      margin-bottom: 1.2rem;
      line-height: 1.2;
    }

    .hero h1 span {
      background: linear-gradient(90deg, #ffffff, #bbbbbb);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero p {
      font-size: 1.1rem;
      color: #bfbfbf;
      margin-bottom: 2rem;
    }

    /* Avatar Row */
    .avatars {
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 2rem;
      gap: 0.5rem;
    }

    .avatars img {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      border: 2px solid #111;
    }

    .avatars-text {
      font-size: 0.95rem;
      color: #ccc;
      margin-left: 0.5rem;
    }

    .avatars-text strong {
      color: #fff;
    }

    /* CTA Button */
    .hero .btn {
      display: inline-block;
      padding: 0.9rem 2rem;
      font-size: 1rem;
      font-weight: 600;
      border: none;
      border-radius: 12px;
      cursor: pointer;
      background: linear-gradient(90deg, #3b82f6, #6366f1);
      color: #fff;
      transition: 0.3s ease;
      text-decoration: none;
    }

    .hero .btn:hover {
      transform: translateY(-3px);
      opacity: 0.9;
    }

    @media (max-width: 768px) {
      .hero h1 {
        font-size: 2.2rem;
      }
      .hero p {
        font-size: 1rem;
      }
    }

        /* Cards grid */
        .grid{
            display:grid;
            gap:28px;
        }

        /* Testimonials */
        .section{
            padding:48px 20px;
            position: relative;
            background: rgba(5,5,7,0.0); /* সম্পূর্ণ transparent */
        }
        .section h2{
            font-size:clamp(22px, 2.2vw + 1rem, 34px);
            margin:0 0 28px;
            color:#fff;
        }

        .section::before, .hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(0,0,0,0.2); /* transparency overlay */
            z-index: -1;
        }

        .reviews{
            display:grid;
            grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
            gap:20px;
        }
        .card{
              background:linear-gradient(180deg, rgba(255,255,255,0.015), rgba(255,255,255,0.01));
    border-radius:var(--radius);
    padding:20px;
    box-shadow: 0 8px 30px rgba(3,6,15,0.6);
    border:1px solid rgba(0, 150, 255, 0.2); /* হালকা নীল border */
    transition: transform .28s ease, box-shadow .28s ease, border-color .28s ease;
    position: relative;
    overflow: hidden;
        }
        .card:hover{transform:translateY(-8px); box-shadow:0 20px 60px rgba(3,6,15,0.7)}

        .review-text{color:var(--muted);font-size:15px;margin-bottom:16px}
        .reviewer{display:flex;gap:14px;align-items:center}
        .reviewer img{width:54px;height:54px;border-radius:50%;object-fit:cover;border:2px solid rgba(255,255,255,0.03)}
        .reviewer h4{margin:0;font-size:15px;color:#fff}
        .reviewer p{margin:0;color:var(--muted);font-size:13px}

.card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at top left, rgba(0, 150, 255, 0.15), transparent 70%);
    opacity: 0;
    transition: opacity .4s ease;
    z-index: 0;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(0,150,255,0.5);
    border-color: rgba(0,150,255,0.6); /* hover এ border deep blue হবে */
}

.card:hover::before {
    opacity: 1; /* হালকা নীল glow ভেতর থেকে আসবে */
}

.card * {
    position: relative;
    z-index: 1; /* text glow এর নিচে না যায় */
}


        /* Portfolio */
  /* Portfolio Filters */
.portfolio-filters {
  gap: 12px 16px;
  margin-bottom: 24px;
  align-items: center;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
}

.portfolio-filters .filter-btn {
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  border:1px solid rgba(0, 150, 255, 0.25); /* সবসময় হালকা নীল border */
  color: var(--muted);
  padding: 8px 18px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: all 0.25s ease;
}

.portfolio-filters .filter-btn:hover,
.portfolio-filters .filter-btn.active {
  background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
  color: #fff;
  border-color: transparent; /* active হলে border transparent হয়ে যাবে */
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(32, 82, 235, 0.25);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

/* Cards */
.portfolio-card {
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px;
  padding: 10px;
  overflow: hidden;
  transition: transform 0.3s ease;
}
.portfolio-card:hover { transform: translateY(-6px); }

/* Thumbnail zoom */
.thumb-wrapper {
  position: relative;
  overflow: hidden; /* scrollbar লুকানো হলো */
  border-radius: 8px;
  max-height: 300px; /* চাইলে height adjust করুন */
}

.zoom-thumb {
  width: 100%;
  border-radius: 8px;
  transition: transform 0.3s ease;
  transform-origin: center center; /* zoom center থেকে হবে */
  cursor: grab;
  display: block;
}

.zoom-thumb:active {
  cursor: grabbing;
}


/* zoom control buttons */
.zoom-controls {
  position: absolute;
  bottom: 8px;
  right: 8px;
  display: flex;
  gap: 6px;
}

.zoom-btn {
  background: rgba(0,0,0,0.6);
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 28px;
  height: 28px;
  font-size: 18px;
  cursor: pointer;
  transition: background 0.3s ease;
}

.zoom-btn:hover {
  background: rgba(0,0,0,0.85);
}

/* Case Study */
.case-container {
  display: flex;
  flex-direction: column;
  gap: 40px; /* card এর মাঝে proper gap */
}

.case-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 24px;
  box-shadow: 0 14px 40px rgba(3,6,15,0.5);
  background: linear-gradient(180deg, rgba(255,255,255,0.015), rgba(255,255,255,0.01));
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.03);
  position: relative;
  overflow: visible;
}

.case-card.reverse {
  flex-direction: row-reverse;
}

/* Image + Text */
.case-card img {
  flex: 1 1 50%;
  max-width: 50%;
  height: auto;
  object-fit: cover;
  border-radius: 10px;
  aspect-ratio: 16/9;
  position: relative;
  z-index: 2;
}

.case-info {
  flex: 1 1 50%;
  max-width: 50%;
  z-index: 2;
}

.case-info h3 {
  margin: 0 0 8px;
  color: #fff;
  font-size: 20px;
}

.case-info p {
  margin: 0 0 16px;
  color: var(--muted);
}

.case-btn {
  display: inline-block;
  background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
  color: #fff;
  padding: 10px 18px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 700;
  z-index: 2;
  position: relative;
}

/* Orb */
.glow-orb {
  position: absolute;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle at center,
              rgba(95,0,255,0.7) 0%,
              rgba(40,0,100,0.4) 70%,
              transparent 100%);
  display: flex;
  justify-content: center;
  align-items: center;
  color: #fff;
  font-weight: 700;
  text-align: center;
  animation: pulseGlow 4s infinite ease-in-out;
  z-index: 0;
  filter: drop-shadow(0 0 30px rgba(95,0,255,0.7));
  pointer-events: none;
}

.glow-orb i {
  font-size: 28px;
  margin-bottom: 6px;
  color: #fff;
}

.glow-orb span {
  font-size: 28px;
  line-height: 1;
}

.glow-orb small {
  font-size: 14px;
  opacity: 0.8;
}

/* Orb Position (Desktop) */
.case-card:not(.reverse) .glow-orb {
  right: -150px;
  top: 30%;
  transform: translateY(-50%);
}

.case-card.reverse .glow-orb {
  left: -150px;
  bottom: -50px;
  transform: none;
}

/* Pulse Animation */
@keyframes pulseGlow {
  0% { transform: scale(0.9); opacity: 0.5; }
  50% { transform: scale(1.25); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.5; }
}

/* Responsive Fix */
@media (max-width: 980px) {
  .case-card,
  .case-card.reverse {
    flex-direction: column;
    text-align: center;
  }
  /* orb mobile এ নিচে যাবে */
@media (max-width: 980px) {
  .case-card .glow-orb {
    position: relative !important;
    margin: 28px auto 0 !important;
    top: auto !important;
    left: auto !important;
    right: auto !important;
    bottom: auto !important;
    width: 280px;
    height: 280px;
    transform: none !important;
  }
}


  .case-card img,
  .case-info {
    flex: 1 1 100%;
    max-width: 100%;
  }

  /* orb mobile এ নিচে যাবে */
  .case-card .glow-orb,
  .case-card.reverse .glow-orb {
    position: relative;
    margin: 28px auto 0;
    top: auto;
    left: auto;
    right: auto;
    bottom: auto;
    width: 280px;
    height: 280px;
    transform: none;
  }
}


        /* Process */
        .process-steps{
            display:grid;
            grid-template-columns:repeat(auto-fit,minmax(180px,1fr));
            gap:18px;
            margin-top:18px;
        }
        .process-cta {
  text-align: center;
  margin-top: 28px;
}
        .step{
            background: linear-gradient(180deg, rgba(255,255,255,0.01), rgba(255,255,255,0.005));
            padding:20px;
            border-radius:12px;
            color:var(--muted);
            text-align:center;
            border:1px solid rgba(255,255,255,0.03);
            transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.24s;
            position: relative;
  border: 1px solid rgba(0, 150, 255, 0.25);
  box-shadow: 0 0 12px rgba(0,150,255,0.12); /* subtle glow */
        }
        .step:hover{transform:translateY(-8px);   border-color: rgba(0,150,255,0.6);
  box-shadow: 0 0 20px rgba(0,150,255,0.25); }
        .step-icon{font-size:28px;margin-bottom:10px}
        .step h3{margin:0 0 8px;color:#fff;font-size:16px}
        .step p{margin:0;font-size:14px;color:var(--muted)}
        /* Step icon - circular background + animation */
.step-icon {
  font-size: 28px;
  margin-bottom: 12px;
  width: 60px;
  height: 60px;
  line-height: 60px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(0,150,255,0.3), rgba(0,200,255,0.4));
  display: inline-block;
  text-align: center;
  transition: transform 0.4s ease, box-shadow 0.3s ease;
  box-shadow: 0 4px 12px rgba(0,150,255,0.25);
}

/* Icon float animation (continuous subtle movement) */
@keyframes float {
  0% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-6px) rotate(5deg); }
  100% { transform: translateY(0px) rotate(0deg); }
}

.step-icon {
  animation: float 3s ease-in-out infinite;
}

/* Hover effect on step */
.step:hover .step-icon {
  transform: scale(1.2) rotate(15deg);
  box-shadow: 0 8px 20px rgba(0,150,255,0.4);
}

/* Optional: gradient text effect for icon (extra premium feel) */
.step-icon {
  background: linear-gradient(45deg, #00f, #0ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}


        /* Bubble canvas background */
#bubbleCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none; /* disable interaction */
  z-index: -1; /* behind everything */
}

/* Settings Button (base) */
.settings-btn {
  font-size: 18px;
  cursor: pointer;
  color: var(--muted);
  background: transparent;
  border: none;
  padding: 6px;
  border-radius: 8px;
  position: relative;
  overflow: hidden;   /* ripple effect er jonno */
  transition: transform 0.15s ease, color 0.2s;
}

/* Active (toggle on) */
.settings-btn.active {
  color: var(--accent-1);
}

/* Click (scale bounce) */
.settings-btn:active {
  transform: scale(0.85);
}

/* Ripple effect */
.settings-btn::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 0;
  height: 0;
  background: rgba(0, 0, 0, 0.15);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.4s ease, height 0.4s ease, opacity 0.6s ease;
  opacity: 0;
}

.settings-btn:active::after {
  width: 120%;
  height: 120%;
  opacity: 1;
  transition: 0s;
}




        /* Footer */
        .footer{
            background: linear-gradient(180deg,#06060a,#050507);
            padding:42px 20px;
            color:var(--muted);
            border-top:1px solid rgba(255,255,255,0.02);
            margin-top:40px;
        }
        .footer-container{display:flex;gap:28px;flex-wrap:wrap;align-items:flex-start;justify-content:space-between}
        .footer-about img{width:42px;height:42px;border-radius:8px;object-fit:cover}
        .footer-about p{max-width:360px;color:var(--muted)}
        .footer-links h4,.footer-contact h4{color:#fff;margin-bottom:10px}
        .footer-links ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px}
        .footer-links a{color:var(--muted);text-decoration:none}
        .social-icons{display:flex;gap:12px;margin-top:8px}
        .social-icons a{color:var(--muted);text-decoration:none;font-size:18px}

        .footer-bottom{margin-top:28px;text-align:center;color:#818199;font-size:13px;padding-top:14px;border-top:1px solid rgba(255,255,255,0.02)}

.social-icons {
    display: flex;
    gap: 16px;
    margin-top: 8px;
}

.social-btn {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.03); /* subtle dark box */
    border-radius: 12px; /* rounded square */
    border: 1px solid rgba(255, 255, 255, 0.05); /* thin light border */
    box-shadow: 0 0 6px rgba(255, 255, 255, 0.05); /* subtle glow */
    color: #fff;
    font-size: 20px;
    transition: all 0.3s ease;
}

.social-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 0 12px rgba(255, 255, 255, 0.15); /* stronger glow on hover */
}

/* Individual hover colors */
.social-btn:nth-child(1):hover { color: #1877F2; } /* Facebook */
.social-btn:nth-child(2):hover { color: #E1306C; } /* Instagram */
.social-btn:nth-child(3):hover { color: #0077B5; } /* LinkedIn */



        /* Responsive tweaks */
        @media (max-width:980px){
            .hero{min-height:55vh;padding:36px 16px}
            .case-card img,.case-info{width:100%}
            .case-card, .case-card.reverse{flex-direction:column}
            .case-info{text-align:center}
            .hero h1{font-size:clamp(22px, 4vw + 0.6rem, 36px)}
            .hero .inner{padding:clamp(16px, 3.5vw, 36px)}
        }

        @media (max-width:768px){
            .menu{display:none;}
            .nav-toggle{display:inline-flex;align-items:center;justify-content:center}
            .navbar-inner{gap:12px;padding:8px 12px}
            .logo span{display:none} /* optional condense */

            /* Mobile menu open state becomes full-width below navbar */
            .menu.mobile-open{
                display:flex !important;
                position:absolute;
                top:100%;
                left:8px;
                right:8px;
                background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
                border-radius:10px;
                padding:12px;
                flex-direction:column;
                gap:12px;
                box-shadow:0 10px 40px rgba(2,6,23,0.6);
                border:1px solid rgba(255,255,255,0.03);
                z-index:40;
            }
        }

        @media (max-width:520px){
            .logo{font-size:14px}
            .reviewer img{width:48px;height:48px}
            .hero h1{font-size:clamp(20px, 5vw + 0.4rem, 28px)}
            .hero p{font-size:14px}
            .hero .inner{padding:18px}
            .menu{display:none}
            .container{padding:0 14px}
            .nav-toggle{display:inline-flex}
            .footer-container{flex-direction:column;gap:16px}

            /* disable heavy fixed background on small devices for performance */
            .hero{background-attachment: scroll}
        }

        /* make focus states visible on interactive elements */
        a:focus, button:focus {outline-offset:3px}

        /* Scroll animation base */
        .section, .portfolio-card, .card, .case-card, .step {
            opacity: 0;
            transform: translateY(40px);
            transition: opacity 0.6s ease-out, transform 0.6s ease-out;
        }

        .scrolled {
            opacity: 1;
            transform: translateY(0);
        }

        /* Mouse Glass Effect */
.mouse-glass {
  position: fixed;
  top: 0;
  left: 0;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  pointer-events: none;
  background: radial-gradient(circle, rgba(0, 162, 255, 0.15), transparent 70%);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  transform: translate(-50%, -50%);
  z-index: 9999;   /* একেবারে উপরে রাখো */
  transition: opacity 0.3s ease;
  opacity: 0;      /* ডিফল্টে লুকানো */
}

/* Deep Blue Neon Scrollbar (screenshot style) */
::-webkit-scrollbar {
  width: 6px; /* আরও চিকন */
}

::-webkit-scrollbar-track {
  background: #000; /* পুরো কালো যাতে theme এর সাথে match করে */
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #1a40ff, #001133); /* smooth deep blue gradient */
  border-radius: 6px;
  box-shadow: inset 0 0 4px rgba(0,0,0,0.6),
              0 0 12px rgba(26,64,255,0.6); /* soft glow */
  transition: all 0.3s ease;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, #3366ff, #001144);
  box-shadow: 0 0 16px rgba(51,102,255,0.9);
}