/* BITS BBF Center for Research & Strategic Learning - Design System */

:root {
  /* Color Palette */
  --primary-blue: #0d47a1;
  --primary-dark: #0a3680;
  --primary-light: #2196f3;
  --primary-gradient: linear-gradient(135deg, #0d47a1 0%, #1565c0 100%);
  --accent-teal: #00d1b2;
  --accent-gradient: linear-gradient(135deg, #00d1b2 0%, #00a896 100%);
  --slate-dark: #0f172a;
  --slate-card: #1e293b;
  --light-bg: #f8fafc;
  --light-blue-subtle: #f1f7fe;
  --white: #ffffff;
  
  /* Text Colors */
  --text-dark: #1e293b;
  --text-muted: #64748b;
  --text-light: #f8fafc;
  
  /* Shadows & Glassmorphism */
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 10px 30px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 40px rgba(15, 23, 42, 0.12);
  --glass-bg: rgba(255, 255, 255, 0.85);
  --glass-border: rgba(255, 255, 255, 0.4);
  --glass-shadow: 0 8px 32px 0 rgba(13, 71, 161, 0.06);
  --glass-dark-bg: rgba(15, 23, 42, 0.85);
  --glass-dark-border: rgba(255, 255, 255, 0.08);
  
  /* Border Radii */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Global Reset & Base */
body {
  font-family: 'Poppins', sans-serif;
  background-color: var(--white);
  color: var(--text-dark);
  overflow-x: hidden;
  line-height: 1.6;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 100px;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  letter-spacing: -0.02em;
}

section {
  padding: 100px 0;
  position: relative;
}

/* Background Gradients & Accents */
.bg-subtle-blue {
  background-color: var(--light-blue-subtle);
}

.text-gradient {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-accent-gradient {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-accent-teal {
  color: var(--accent-teal) !important;
}

/* Modern Scrollbars */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--light-bg);
}
::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: #94a3b8;
}

/* Header & Floating Responsive Navigation */
.header-wrapper {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 20px 0;
  transition: var(--transition-normal);
}

.header-wrapper.scrolled {
  padding: 12px 0;
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--shadow-md);
}

.header-wrapper.scrolled .brand-dept {
  color: var(--primary-blue);
}

.header-wrapper.scrolled .brand-org {
  color: var(--text-muted);
}

.header-wrapper.scrolled .navbar-toggler {
  color: var(--slate-dark);
  border-color: rgba(15, 23, 42, 0.2);
}

.brand-section {
  display: flex;
  align-items: center;
}

.navbar-logo {
  height: 65px;
  width: auto;
  transition: var(--transition-normal);
}

.header-wrapper.scrolled .navbar-logo {
  height: 55px;
}

.brand-dept {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1.2;
  transition: var(--transition-normal);
}

.brand-org {
  font-size: 0.8rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: rgba(255, 255, 255, 0.85);
  transition: var(--transition-normal);
}

/* Custom Navbar Collapse Drawer */
@media (max-width: 991.98px) {
  .header-wrapper {
    background: var(--slate-dark);
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }
  .header-wrapper.scrolled {
    background: var(--slate-dark);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
  .header-wrapper .brand-dept {
    color: var(--white) !important;
    font-size: 1rem;
  }
  .header-wrapper .brand-org {
    color: rgba(255, 255, 255, 0.7) !important;
    font-size: 0.75rem;
  }
  .header-wrapper .navbar-logo {
    height: 50px;
  }
  
  .navbar-collapse {
    background: var(--slate-dark);
    border-radius: var(--radius-md);
    margin-top: 15px;
    padding: 20px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: var(--shadow-lg);
  }
  .navbar-nav {
    background: transparent !important;
    backdrop-filter: none !important;
    border: none !important;
    padding: 0 !important;
    flex-direction: column !important;
    align-items: flex-start !important;
  }
  .navbar-nav .nav-item {
    width: 100%;
  }
  .navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.85) !important;
    padding: 12px 0 !important;
    font-size: 0.9rem !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }
  .navbar-nav .dropdown-menu {
    background: rgba(255, 255, 255, 0.05) !important;
    border: none !important;
    box-shadow: none !important;
    padding-left: 15px !important;
    margin-top: 5px !important;
  }
  .navbar-nav .dropdown-item {
    color: rgba(255, 255, 255, 0.8) !important;
    font-size: 0.85rem !important;
    padding: 10px 0 !important;
  }
  .navbar-nav .dropdown-item:hover {
    color: var(--accent-teal) !important;
    background: transparent !important;
  }
}

@media (min-width: 992px) {
  .nav-row {
    display: flex;
    justify-content: flex-end;
    align-items: center;
  }
  .navbar-nav {
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.15);
    padding: 6px 18px;
    border-radius: var(--radius-full);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    flex-direction: row;
    align-items: center;
    gap: 4px;
    transition: var(--transition-normal);
  }
  .header-wrapper.scrolled .navbar-nav {
    background: rgba(13, 71, 161, 0.06);
    border-color: rgba(13, 71, 161, 0.12);
  }
  .nav-link {
    color: var(--white) !important;
    font-weight: 600;
    padding: 8px 16px !important;
    text-transform: uppercase;
    font-size: 0.78rem;
    letter-spacing: 0.5px;
    border-radius: var(--radius-full);
    transition: var(--transition-fast);
    position: relative;
  }
  .nav-link::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 15%;
    width: 70%;
    height: 2px;
    background-color: var(--accent-teal);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }
  .nav-link:hover::after, .nav-link.active::after {
    transform: scaleX(1);
  }
  .nav-link:hover, .nav-link.active {
    color: var(--accent-teal) !important;
    background: transparent !important;
  }
  .header-wrapper.scrolled .nav-link {
    color: var(--slate-dark) !important;
  }
  .header-wrapper.scrolled .nav-link::after {
    background-color: var(--primary-blue);
  }
  .header-wrapper.scrolled .nav-link:hover, .header-wrapper.scrolled .nav-link.active {
    color: var(--primary-blue) !important;
    background: transparent !important;
  }
  .dropdown-menu {
    border-radius: var(--radius-md) !important;
    margin-top: 15px !important;
    animation: slideUp 0.3s ease forwards;
  }
}

/* Animations */
@keyframes slideUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Hero Section Style */
.hero {
  min-height: 100vh;
  padding-top: 160px;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.95) 0%, rgba(13, 71, 161, 0.85) 100%), url('../img/research-complex1.png');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  display: flex;
  align-items: center;
  color: var(--white);
  position: relative;
}

@media (max-width: 991.98px) {
  .hero {
    background-attachment: scroll; /* parallax fixed is buggy on mobile */
    padding-top: 140px;
    padding-bottom: 80px;
    min-height: auto;
  }
  .hero h1 {
    font-size: 2.8rem !important;
  }
}

.initiative-tag {
  display: inline-block;
  padding: 8px 24px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-full);
  letter-spacing: 3px;
  font-size: 0.82rem;
  text-transform: uppercase;
  color: var(--accent-teal);
  box-shadow: var(--shadow-sm);
}

.hero h1 {
  font-size: 4rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 25px;
  letter-spacing: -0.03em;
}

.hero .lead {
  font-size: 1.15rem;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.85);
}

.hero-visual-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transform: perspective(1000px) rotateY(-5deg);
  transition: var(--transition-slow);
}

.hero-visual-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(to top, rgba(15, 23, 42, 0.4) 0%, transparent 100%);
  pointer-events: none;
}

.hero-visual-card:hover {
  transform: perspective(1000px) rotateY(0deg) scale(1.02);
}

.hero-visual-card img {
  width: 100%;
  height: 400px;
  object-fit: cover;
}

/* Custom Buttons */
.btn-premium {
  background: var(--accent-gradient);
  color: var(--white);
  font-weight: 600;
  padding: 14px 32px;
  border-radius: var(--radius-full);
  border: none;
  box-shadow: 0 4px 15px rgba(0, 209, 178, 0.3);
  transition: var(--transition-fast);
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 1px;
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.btn-premium::after {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.25), transparent);
  transition: 0.5s;
  z-index: -1;
}

.btn-premium:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 209, 178, 0.5);
  color: var(--white);
}

.btn-premium:hover::after {
  left: 100%;
  transition: 0.6s ease-in-out;
}

.btn-premium-outline {
  background: transparent;
  color: var(--white);
  font-weight: 600;
  padding: 14px 32px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.4);
  transition: var(--transition-fast);
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 1px;
}

.btn-premium-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--white);
  color: var(--white);
  transform: translateY(-2px);
}

/* Vision Transition Container */
.vision-container {
  background: linear-gradient(180deg, var(--slate-dark) 0%, #172554 100%);
  position: relative;
  overflow: hidden;
}

.vision-container::before {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(0, 209, 178, 0.1) 0%, transparent 70%);
  top: -10%;
  left: -10%;
  pointer-events: none;
}

.vision-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 50px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: var(--shadow-lg);
}

.vision-quote {
  font-size: 1.4rem;
  font-weight: 300;
  font-style: italic;
  color: var(--accent-teal);
  line-height: 1.6;
}

.glass-card {
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: var(--radius-md);
  padding: 35px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(13, 71, 161, 0.08);
  height: 100%;
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.glass-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; width: 4px; height: 100%;
  background: var(--primary-gradient);
  opacity: 0;
  transition: var(--transition-fast);
  z-index: 2;
}

.glass-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--primary-light), var(--accent-teal)) border-box;
  -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: destination-out;
  mask-composite: exclude;
  opacity: 0;
  transition: var(--transition-normal);
  pointer-events: none;
}

.glass-card:hover {
  transform: translateY(-8px) scale(1.01);
  box-shadow: 0 20px 40px rgba(13, 71, 161, 0.15);
  border-color: transparent;
}

.glass-card:hover::before {
  opacity: 1;
}

.glass-card:hover::after {
  opacity: 0.8;
}

/* Research Box Grid */
.research-box {
  border-radius: var(--radius-md);
  padding: 40px 30px;
  height: 100%;
  color: var(--white);
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
  z-index: 1;
  box-shadow: var(--shadow-md);
}

.research-box.ngs-theme {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.research-box.sim-theme {
  background: linear-gradient(135deg, #0d47a1 0%, #1565c0 100%);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.research-box::before {
  content: '';
  position: absolute;
  top: -50%; right: -50%;
  width: 200px; height: 200px;
  background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 75%);
  border-radius: 50%;
  z-index: -1;
  transition: var(--transition-slow);
}

.research-box:hover::before {
  transform: scale(1.5) translate(-10%, 10%);
}

.research-box:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.research-box i {
  font-size: 2.8rem;
  color: var(--accent-teal);
  margin-bottom: 25px;
  display: inline-block;
}

/* HPC Cluster & Terminal UI */
.hpc-info-card {
  background: var(--slate-dark);
  color: var(--white);
  border-radius: var(--radius-md);
  padding: 30px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  height: 100%;
}

.terminal-mockup {
  background: #090d16;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(255, 255, 255, 0.08);
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.85rem;
  color: #38bdf8;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.terminal-header {
  background: #111827;
  padding: 12px 18px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.terminal-buttons {
  display: flex;
  gap: 6px;
  margin-right: 15px;
}

.terminal-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.dot-red { background: #ef4444; }
.dot-yellow { background: #f59e0b; }
.dot-green { background: #22c55e; }

.terminal-title {
  color: var(--text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.terminal-body {
  padding: 20px;
  flex-grow: 1;
  height: auto;
  min-height: 420px;
  overflow-y: auto;
}

.terminal-prompt {
  color: #a855f7;
  margin-right: 8px;
}

.terminal-input {
  color: var(--white);
}

.terminal-output {
  color: #e2e8f0;
  margin-top: 5px;
  margin-bottom: 15px;
  line-height: 1.4;
  white-space: pre-wrap;
}

.terminal-success {
  color: var(--accent-teal);
}

/* Mentor & Profile Cards */
.mentor-card {
  text-align: center;
  transition: var(--transition-normal);
}

.mentor-image-container {
  position: relative;
  width: 150px;
  height: 150px;
  margin: 0 auto 25px auto;
  border-radius: 50%;
  overflow: hidden;
  border: 4px solid var(--light-blue-subtle);
  box-shadow: var(--shadow-sm);
  transition: var(--transition-normal);
}

.mentor-card:hover .mentor-image-container {
  border-color: var(--accent-teal);
  transform: scale(1.05);
}

.mentor-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.mentor-socials {
  margin-top: 15px;
  display: flex;
  justify-content: center;
  gap: 12px;
}

.mentor-social-btn {
  width: 35px;
  height: 35px;
  border-radius: 50%;
  background: var(--light-blue-subtle);
  color: var(--primary-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  transition: var(--transition-fast);
  text-decoration: none;
}

.mentor-social-btn:hover {
  background: var(--primary-blue);
  color: var(--white);
}

/* Executive Course Cards */
.course-card {
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: var(--radius-md);
  border: 1px solid rgba(13, 71, 161, 0.06);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: var(--transition-normal);
  position: relative;
}

.course-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--primary-light), var(--accent-teal)) border-box;
  -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: destination-out;
  mask-composite: exclude;
  opacity: 0;
  transition: var(--transition-normal);
  pointer-events: none;
}

.course-card:hover {
  transform: translateY(-8px) scale(1.01);
  box-shadow: 0 20px 40px rgba(13, 71, 161, 0.15);
  border-color: transparent;
}

.course-card:hover::after {
  opacity: 0.8;
}

.course-header {
  padding: 30px 30px 10px 30px;
}

.course-badge {
  display: inline-block;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 15px;
}

.badge-advanced {
  background-color: #fee2e2;
  color: #ef4444;
}

.badge-intermediate {
  background-color: #fef3c7;
  color: #d97706;
}

.badge-foundational {
  background-color: #dcfce7;
  color: #22c55e;
}

.course-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--slate-dark);
  line-height: 1.4;
}

.course-body {
  padding: 0 30px 20px 30px;
  flex-grow: 1;
}

.course-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.course-meta {
  border-top: 1px solid #f1f5f9;
  padding-top: 15px;
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.course-meta i {
  color: var(--primary-blue);
  margin-right: 5px;
}

.course-footer {
  padding: 20px 30px 30px 30px;
  background: var(--light-bg);
  border-top: 1px solid #f1f5f9;
}

/* Contact Icon Boxes */
.contact-icon-box {
  width: 48px;
  height: 48px;
  min-width: 48px;
  min-height: 48px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-gradient);
  color: var(--white);
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 209, 178, 0.15);
  transition: var(--transition-fast);
}

.contact-icon-box i {
  font-size: 1.25rem;
  color: var(--white);
}

.research-box .d-flex i {
  margin-bottom: 0;
  font-size: 2.2rem;
}

/* Contact Form UI */
.contact-form-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 45px;
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(15, 23, 42, 0.05);
}

.form-floating > .form-control {
  border-radius: var(--radius-sm);
  border: 1px solid #cbd5e1;
  font-size: 0.95rem;
}

.form-floating > .form-control:focus {
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 0.25rem rgba(13, 71, 161, 0.15);
}

/* Footer Section */
.footer-main {
  background: var(--slate-dark);
  color: #cbd5e1;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-main p {
  color: #cbd5e1 !important;
}

.footer-main .text-muted {
  color: #94a3b8 !important;
}

.footer-link {
  color: #cbd5e1;
  text-decoration: none;
  transition: var(--transition-fast);
}

.footer-link:hover {
  color: var(--accent-teal);
  padding-left: 6px;
}

.footer-logo {
  height: 60px;
  margin-bottom: 15px;
}

/* Interactive Toast Notification */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1100;
}

/* Animation Reveal on Scroll */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-on-scroll.revealed {
  opacity: 1;
  transform: translateY(0);
}

.delay-1 { transition-delay: 0.15s; }
.delay-2 { transition-delay: 0.3s; }
.delay-3 { transition-delay: 0.45s; }

/* Dynamic Floating Blobs */
.glowing-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(140px);
  z-index: 0;
  opacity: 0.12;
  pointer-events: none;
  animation: floatBlob 15s infinite alternate ease-in-out;
}

.blob-1 {
  width: 400px;
  height: 400px;
  background: var(--primary-light);
  top: 15%;
  left: 5%;
}

.blob-2 {
  width: 450px;
  height: 450px;
  background: var(--accent-teal);
  bottom: 25%;
  right: 8%;
  animation-delay: -7s;
}

@keyframes floatBlob {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(80px, 50px) scale(1.18); }
}

/* Statistics Counter Grid */
.stat-item {
  position: relative;
  z-index: 1;
}

.stat-number {
  display: inline-block;
  font-size: 3rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.03em;
}

.stat-suffix {
  display: inline-block;
  font-size: 1.8rem;
  font-weight: 700;
  margin-left: 2px;
}

.stat-label {
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-top: 8px;
  color: #cbd5e1 !important;
}

/* Filter Controls */
.btn-filter {
  padding: 10px 24px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(13, 71, 161, 0.12);
  background: var(--white);
  color: var(--text-dark);
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  transition: var(--transition-fast);
}

.btn-filter:hover, .btn-filter.active {
  background: var(--primary-blue);
  color: var(--white);
  border-color: var(--primary-blue);
  box-shadow: 0 4px 15px rgba(13, 71, 161, 0.18);
}

/* Course Card filter wrappers */
.course-card-wrapper {
  transition: opacity 0.4s ease, transform 0.4s ease;
}

/* Blinking Terminal Cursor */
.terminal-cursor {
  display: inline-block;
  width: 8px;
  height: 15px;
  background-color: var(--accent-teal);
  margin-left: 3px;
  animation: blinkCursor 0.9s infinite step-end;
  vertical-align: middle;
}

@keyframes blinkCursor {
  from, to { background-color: transparent }
  50% { background-color: var(--accent-teal) }
}

/* Neural Network Background Canvas */
#neural-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
  opacity: 0.28;
}

.hero .container {
  position: relative;
  z-index: 5;
}

.stats-section .container {
  position: relative;
  z-index: 5;
}

/* Scroll Progress Bar styling */
.scroll-progress-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: transparent;
  z-index: 2000;
}

.scroll-progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--primary-light) 0%, var(--accent-teal) 100%);
  box-shadow: 0 0 8px rgba(0, 209, 178, 0.6);
  transition: width 0.05s ease-out;
}

/* Shimmer continuous effect on premium buttons */
.btn-premium {
  position: relative;
  overflow: hidden;
}

.btn-premium::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
  animation: shimmerSheen 4.5s infinite linear;
  pointer-events: none;
  z-index: 2;
}

@keyframes shimmerSheen {
  0% { left: -100%; }
  25% { left: 100%; }
  100% { left: 100%; }
}

/* Terminal Interactive Tab Buttons */
.terminal-tabs {
  display: flex;
  gap: 8px;
  margin-left: auto;
  flex-wrap: wrap;
}

.terminal-tab-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #94a3b8;
  padding: 4px 10px;
  font-size: 0.72rem;
  font-weight: 500;
  border-radius: 6px;
  cursor: pointer;
  font-family: 'Poppins', sans-serif;
  transition: var(--transition-fast);
}

.terminal-tab-btn:hover, .terminal-tab-btn.active {
  background: rgba(0, 209, 178, 0.12);
  border-color: var(--accent-teal);
  color: var(--accent-teal);
  box-shadow: 0 0 10px rgba(0, 209, 178, 0.2);
}

/* Pulsing LED Status Dots in Badges */
.status-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  margin-right: 6px;
  vertical-align: middle;
  position: relative;
  bottom: 1px;
}

.status-dot::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  animation: statusPulse 1.8s infinite ease-in-out;
}

.status-dot-green { background-color: #22c55e; }
.status-dot-green::after { background-color: #22c55e; }
.status-dot-orange { background-color: #f59e0b; }
.status-dot-orange::after { background-color: #f59e0b; }
.status-dot-red { background-color: #ef4444; }
.status-dot-red::after { background-color: #ef4444; }

@keyframes statusPulse {
  0% { transform: scale(1); opacity: 0.8; }
  100% { transform: scale(2.6); opacity: 0; }
}

/* Floating Blobs Keyframe Spin & Drift */
.blob-1 {
  animation: floatBlob1 18s infinite alternate ease-in-out;
}

.blob-2 {
  animation: floatBlob2 22s infinite alternate ease-in-out;
}

@keyframes floatBlob1 {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(50px, -40px) scale(1.1); }
  100% { transform: translate(-30px, 30px) scale(0.9); }
}

@keyframes floatBlob2 {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-60px, 50px) scale(0.92); }
  100% { transform: translate(40px, -30px) scale(1.15); }
}

/* Additional Glowing Blobs for lower sections */
.glowing-blob-subtle {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  z-index: 0;
  opacity: 0.05;
  pointer-events: none;
}

.blob-vision {
  width: 350px;
  height: 350px;
  background: var(--accent-teal);
  top: 20%;
  right: 5%;
  animation: floatBlob1 20s infinite alternate ease-in-out;
}

.blob-courses {
  width: 450px;
  height: 450px;
  background: var(--primary-light);
  bottom: 10%;
  left: -10%;
  animation: floatBlob2 25s infinite alternate ease-in-out;
}