html {
  scrollbar-width: thin;
  scrollbar-color: #3b82f6 rgba(15, 23, 42, 0.5);
}
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: rgba(15, 23, 42, 0.5);
}
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #3b82f6, #1f2d3d);
  border-radius: 10px;
  border: 2px solid rgba(15, 23, 42, 0.5);
}
::-webkit-scrollbar-thumb:hover {
  background: #3b82f6;
}
body {
  font-family: 'Poppins', 'Noto Sans Bengali', 'Hind Siliguri', 'SolaimanLipi', sans-serif;
  line-height: 1.75;
  letter-spacing: 0.01em;
  background: radial-gradient(circle at top right, rgba(59, 130, 246, 0.08), transparent 40%), radial-gradient(circle at bottom left, rgba(250, 204, 21, 0.05), transparent 40%), var(--theme-body-bg);
  background-attachment: fixed;
}
h1, h2, h3, h4, h5, h6, .section-title {
  line-height: 1.5;
  letter-spacing: 0.015em;
}
main .hero-section, main .rg-section, main .author-box, main .bd-hot-links {
  padding-top: 72px;
  padding-bottom: 72px;
}
@media (max-width: 767.98px) {
  main .hero-section, main .rg-section, main .author-box, main .bd-hot-links {
    padding-top: 56px;
    padding-bottom: 56px;
  }
}
.navbar {
  background-image: linear-gradient(to bottom, rgba(26, 34, 53, 0.95), rgba(17, 24, 39, 0.9));
  backdrop-filter: blur(8px);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}
.navbar .nav-link {
  border-radius: 8px;
  transition: background-color 0.3s ease, color 0.3s ease, transform 0.2s ease;
}
.navbar .nav-link:hover, .navbar .nav-link.active {
  transform: translateY(-1px);
}
main .card, main .card-dark {
  background: linear-gradient(145deg, rgba(31, 45, 61, 0.9), rgba(26, 34, 53, 0.95));
  border: 1px solid rgba(59, 130, 246, 0.15);
  border-radius: 14px;
  padding: 24px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  overflow: hidden;
}
main .card:hover, main .card-dark:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(59, 130, 246, 0.15);
  border-color: rgba(59, 130, 246, 0.4);
}
main .card-icon {
  color: #facc15;
  text-shadow: 0 0 15px rgba(250, 204, 21, 0.3);
  transition: transform 0.3s ease;
}
main .card:hover .card-icon, main .card-dark:hover .card-icon {
  transform: scale(1.1);
}
.section-title {
  color: #e2e8f0;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.4);
}
main .btn, .navbar .btn {
  border-radius: 9px;
  font-weight: 600;
  transition: all 0.3s ease;
  letter-spacing: 0.02em;
}
.btn-primary-green, .navbar .btn-primary-green {
  background-image: linear-gradient(135deg, #3b82f6, #1f2d3d);
  border: 1px solid #3b82f6;
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.25);
}
.btn-primary-green:hover, .navbar .btn-primary-green:hover {
  transform: scale(1.03);
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.45);
  background-image: linear-gradient(135deg, #4f93f8, #2a3d54);
}
.btn-outline-green, .navbar .btn-outline-green {
  border: 1px solid #3b82f6;
  color: #3b82f6;
  background-color: rgba(59, 130, 246, 0.05);
}
.btn-outline-green:hover, .navbar .btn-outline-green:hover {
  transform: scale(1.03);
  background-color: rgba(59, 130, 246, 0.15);
  border-color: #4f93f8;
  color: #4f93f8;
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.2);
}
.btn-nav-login {
  border-color: #facc15;
  color: #facc15;
}
.btn-nav-login:hover {
  background-color: rgba(250, 204, 21, 0.1);
  color: #fde047;
  box-shadow: 0 0 15px rgba(250, 204, 21, 0.2);
}
main .form-control, main input[type="text"], main input[type="email"], main input[type="password"] {
  border-radius: 8px;
  background-color: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(59, 130, 246, 0.2);
  color: #e2e8f0;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
main .form-control:focus, main input:focus {
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
  background-color: rgba(15, 23, 42, 0.8);
  outline: none;
}
footer {
  background-image: linear-gradient(to top, rgba(11, 31, 26, 0.95), rgba(17, 24, 39, 0.9));
  border-top: 2px solid transparent;
  border-image: linear-gradient(to right, #3b82f6, #facc15, #3b82f6) 1;
}
.footer-links a {
  transition: color 0.3s ease, transform 0.3s ease;
}
.footer-links a:hover {
  transform: translateX(2px);
  color: #3b82f6;
}