/* ============================================
   TECHBRIDGE INSTITUTE — GLOBAL STYLES
   Design: Dark cosmic luxury with electric accents
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Ubuntu:ital,wght@0,300;0,400;0,500;0,700;1,300;1,400&family=DM+Sans:ital,wght@0,300;0,400;0,500;0,600;1,300&family=Space+Mono:wght@400;700&display=swap');

:root {
  --bg-void: #020510;
  --bg-deep: #05091A;
  --bg-card: #080D22;
  --bg-glass: rgba(10, 15, 35, 0.7);
  
  --cyan: #00D4FF;
  --blue: #0066FF;
  --violet: #7B2FFF;
  --orange: #FF6B35;
  --gold: #FFD700;
  --green: #00FF88;
  
  --text-primary: #F0F4FF;
  --text-secondary: #8892B0;
  --text-muted: #4A5568;
  
  --border-glow: rgba(0, 212, 255, 0.2);
  --border-subtle: rgba(255,255,255,0.06);
  
  --font-display: 'Ubuntu', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --font-mono: 'Space Mono', monospace;
  
  --nav-h: 80px;
  --radius: 16px;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg-void);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
  min-height: 100vh;
}

/* ---- SCROLLBAR ---- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-deep); }
::-webkit-scrollbar-thumb { background: linear-gradient(var(--cyan), var(--violet)); border-radius: 3px; }

/* ---- SELECTION ---- */
::selection { background: rgba(0,212,255,0.25); color: #fff; }

/* ============================================ NAVBAR */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  transition: var(--transition);
}

.navbar::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(2, 5, 16, 0);
  backdrop-filter: blur(0px);
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}

.navbar.scrolled::before {
  background: rgba(2, 5, 16, 0.92);
  backdrop-filter: blur(20px);
  border-bottom-color: var(--border-subtle);
}

.nav-container {
  max-width: 1300px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  z-index: 1;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.logo-icon {
  filter: drop-shadow(0 0 12px rgba(0,212,255,0.5));
  transition: filter var(--transition);
}
.nav-logo:hover .logo-icon { filter: drop-shadow(0 0 20px rgba(0,212,255,0.8)); }

.logo-text { display: flex; flex-direction: column; line-height: 1; }
.logo-main {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 800;
  background: linear-gradient(135deg, #fff 0%, var(--cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.logo-sub {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  letter-spacing: 0.2em;
  color: var(--cyan);
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}

.nav-link {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.5rem 0.85rem;
  border-radius: 8px;
  transition: color var(--transition), background var(--transition);
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-link:hover, .nav-link.active { color: #fff; background: rgba(0,212,255,0.08); }
.nav-link.active { color: var(--cyan); }

.arrow { font-size: 0.7rem; transition: transform var(--transition); }
.has-dropdown:hover .arrow { transform: rotate(180deg); }

/* Dropdown */
.has-dropdown { position: relative; }
.dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-8px);
  padding-top: 12px;
  min-width: 220px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
}
.dropdown-inner {
  background: rgba(8, 13, 34, 0.98);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius);
  padding: 0.75rem;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5), 0 0 40px rgba(0,212,255,0.05);
}
.has-dropdown:hover .dropdown {
  opacity: 1;
  pointer-events: all;
  transform: translateX(-50%) translateY(0);
}
.dropdown a {
  display: block;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
  font-size: 0.875rem;
  transition: all 0.2s;
}
.dropdown a:hover { color: var(--cyan); background: rgba(0,212,255,0.08); padding-left: 1rem; }
.dropdown a:focus { color: var(--cyan); }

.nav-cta {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  color: var(--bg-void) !important;
  background: linear-gradient(135deg, var(--cyan), var(--blue));
  padding: 0.6rem 1.4rem !important;
  border-radius: 100px;
  text-decoration: none;
  transition: all var(--transition);
  box-shadow: 0 4px 20px rgba(0,212,255,0.3);
  display: inline-block;
}
.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,212,255,0.5);
  background: linear-gradient(135deg, #fff, var(--cyan)) !important;
  -webkit-text-fill-color: var(--bg-void);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ============================================ FOOTER */
.footer {
  position: relative;
  background: var(--bg-deep);
  border-top: 1px solid var(--border-subtle);
  overflow: hidden;
  margin-top: 6rem;
}

.footer-glow {
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 300px;
  background: radial-gradient(ellipse, rgba(0,212,255,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.footer-container {
  max-width: 1300px;
  margin: 0 auto;
  padding: 4rem 2rem 2rem;
  position: relative;
  z-index: 1;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--border-subtle);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 1.25rem;
}
.footer-name {
  display: block;
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 800;
  background: linear-gradient(135deg, #fff, var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.footer-tagline {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.5rem;
  letter-spacing: 0.2em;
  color: var(--cyan);
  text-transform: uppercase;
}

.footer-desc {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.footer-socials { display: flex; gap: 0.75rem; }
.social-btn {
  width: 38px; height: 38px;
  border-radius: 10px;
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.25s;
  background: var(--bg-glass);
}
.social-btn:hover { border-color: var(--cyan); color: var(--cyan); background: rgba(0,212,255,0.08); transform: translateY(-2px); }

.footer-links-group h4 {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 1.25rem;
}
.footer-links-group ul { list-style: none; }
.footer-links-group li { margin-bottom: 0.6rem; }
.footer-links-group a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 6px;
}
.footer-links-group a::before {
  content: '→';
  font-size: 0.75rem;
  opacity: 0;
  transform: translateX(-6px);
  transition: all 0.2s;
}
.footer-links-group a:hover { color: #fff; }
.footer-links-group a:hover::before { opacity: 1; transform: translateX(0); }

.footer-contact-info h4 {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 1.25rem;
}
.contact-item {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.6;
}
.contact-item svg { flex-shrink: 0; margin-top: 2px; color: var(--cyan); }

.powered-by {
  margin-top: 1.5rem;
  padding: 1rem;
  border: 1px solid var(--border-glow);
  border-radius: 12px;
  background: rgba(0,212,255,0.03);
}
.powered-by > span {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 0.5rem;
}
.powerhouses {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}
.powerhouses span {
  font-size: 0.8rem;
  color: var(--text-secondary);
  padding-left: 0.75rem;
  border-left: 2px solid rgba(0,212,255,0.3);
}

.footer-bottom {
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.8rem;
}
.footer-credit {
  font-family: var(--font-mono);
  font-size: 0.7rem !important;
  color: var(--cyan) !important;
  opacity: 0.7;
}

/* ============================================ UTILITIES */
.container {
  max-width: 1300px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section { padding: 6rem 0; }
.section-sm { padding: 4rem 0; }

.section-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.section-label::before {
  content: '';
  width: 30px;
  height: 1px;
  background: var(--cyan);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.1;
  color: #fff;
  margin-bottom: 1rem;
}

.section-title span {
  background: linear-gradient(135deg, var(--cyan), var(--violet));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 580px;
  line-height: 1.8;
}

.card-glass {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  transition: all var(--transition);
}
.card-glass:hover {
  border-color: rgba(0,212,255,0.2);
  box-shadow: 0 20px 60px rgba(0,0,0,0.3), 0 0 40px rgba(0,212,255,0.05);
  transform: translateY(-4px);
}

/* Glow button */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  color: var(--bg-void);
  background: linear-gradient(135deg, var(--cyan), var(--blue));
  padding: 0.85rem 2rem;
  border-radius: 100px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  box-shadow: 0 4px 24px rgba(0,212,255,0.35);
  position: relative;
  overflow: hidden;
}
.btn-primary::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent);
  opacity: 0;
  transition: opacity 0.25s;
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 40px rgba(0,212,255,0.5); }
.btn-primary:hover::after { opacity: 1; }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-secondary);
  background: transparent;
  padding: 0.85rem 2rem;
  border-radius: 100px;
  border: 1px solid var(--border-subtle);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-ghost:hover { color: var(--cyan); border-color: rgba(0,212,255,0.4); background: rgba(0,212,255,0.05); }

/* Tag */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.3rem 0.75rem;
  border-radius: 100px;
  border: 1px solid;
}
.tag-cyan { color: var(--cyan); border-color: rgba(0,212,255,0.3); background: rgba(0,212,255,0.05); }
.tag-violet { color: var(--violet); border-color: rgba(123,47,255,0.3); background: rgba(123,47,255,0.05); }
.tag-orange { color: var(--orange); border-color: rgba(255,107,53,0.3); background: rgba(255,107,53,0.05); }
.tag-green { color: var(--green); border-color: rgba(0,255,136,0.3); background: rgba(0,255,136,0.05); }

/* ============================================ ANIMATIONS */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}
@keyframes pulse-glow {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 0.8; }
}
@keyframes spin-slow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
@keyframes slide-up {
  from { opacity: 0; transform: translateY(40px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes shimmer {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}
@keyframes scanline {
  from { transform: translateY(-100%); }
  to { transform: translateY(100vh); }
}
@keyframes counter {
  from { opacity: 0; transform: scale(0.8); }
  to { opacity: 1; transform: scale(1); }
}

/* Reveal on scroll */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ============================================ RESPONSIVE */
@media (max-width: 1024px) {
  .footer-top { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  :root { --nav-h: 68px; }
  
  .nav-links {
    position: fixed;
    top: var(--nav-h); left: 0; right: 0;
    background: rgba(2,5,16,0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: flex-start;
    padding: 1.5rem;
    gap: 0.25rem;
    border-bottom: 1px solid var(--border-subtle);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all 0.35s ease;
    z-index: 999;
  }
  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }
  .nav-link { width: 100%; padding: 0.75rem 1rem; }
  .has-dropdown .dropdown { display: none; }
  .hamburger { display: flex; }
  .footer-top { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom { flex-direction: column; text-align: center; }
}