/* ========================================
   Grid Apex — Design System & Styles
   ======================================== */

/* ---------- Google Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Space+Grotesk:wght@400;500;600;700&display=swap');

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Palette */
  --bg-primary:       #06080f;
  --bg-secondary:     #0c1020;
  --bg-card:          rgba(12, 18, 40, 0.55);
  --bg-card-hover:    rgba(18, 28, 60, 0.65);
  --surface:          rgba(255, 255, 255, 0.03);

  --accent-cyan:      #00d4ff;
  --accent-blue:      #3b82f6;
  --accent-purple:    #8b5cf6;
  --accent-emerald:   #34d399;
  --accent-hot:       #f472b6;

  --grad-hero:        linear-gradient(135deg, #00d4ff 0%, #8b5cf6 50%, #f472b6 100%);
  --grad-card:        linear-gradient(160deg, rgba(0,212,255,.12) 0%, rgba(139,92,246,.08) 100%);
  --grad-glow:        radial-gradient(circle at 50% 50%, rgba(0,212,255,.25) 0%, transparent 70%);

  --text-primary:     #f0f4ff;
  --text-secondary:   #94a3c8;
  --text-dim:         #5a6888;

  --border:           rgba(255, 255, 255, 0.06);
  --border-glow:      rgba(0, 212, 255, 0.25);

  /* Typography */
  --font-body:   'Inter', -apple-system, sans-serif;
  --font-display:'Space Grotesk', 'Inter', sans-serif;

  /* Spacing */
  --section-pad: clamp(4rem, 10vw, 8rem) clamp(1.5rem, 5vw, 6rem);

  /* Radius */
  --radius-sm:  8px;
  --radius-md:  14px;
  --radius-lg:  24px;
  --radius-xl:  32px;

  /* Transitions */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* ---------- Utility ---------- */
.container { max-width: 1280px; margin: 0 auto; width: 100%; }
.section-label {
  font-family: var(--font-display);
  font-size: .75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--accent-cyan);
  margin-bottom: 1rem;
  display: inline-flex;
  align-items: center;
  gap: .5rem;
}
.section-label::before {
  content: '';
  width: 24px;
  height: 2px;
  background: var(--accent-cyan);
  border-radius: 2px;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 1.25rem;
}
.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 620px;
  line-height: 1.75;
}
.gradient-text {
  background: var(--grad-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---------- Animated Background ---------- */
#bg-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}
.page-wrapper {
  position: relative;
  z-index: 1;
}

/* ---------- Header / Navbar ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 1rem 0;
  transition: background .4s var(--ease-out), box-shadow .4s var(--ease-out);
}
.navbar.scrolled {
  background: rgba(6, 8, 15, 0.85);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  box-shadow: 0 1px 0 var(--border);
}
.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(1.5rem, 5vw, 6rem);
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: .75rem;
}
.nav-brand img {
  width: 42px;
  height: 42px;
  object-fit: contain;
}
.nav-brand-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.35rem;
  letter-spacing: -.5px;
}
.nav-brand-text span {
  color: var(--accent-cyan);
}
.nav-links {
  display: flex;
  gap: 2.25rem;
}
.nav-links a {
  font-size: .88rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color .3s;
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-cyan);
  transition: width .3s var(--ease-out);
}
.nav-links a:hover { color: var(--text-primary); }
.nav-links a:hover::after { width: 100%; }
.nav-cta {
  padding: .6rem 1.5rem;
  border-radius: var(--radius-sm);
  background: var(--accent-cyan);
  color: #06080f !important;
  font-weight: 600;
  font-size: .88rem;
  transition: transform .25s var(--ease-out), box-shadow .25s;
}
.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 24px rgba(0, 212, 255, .35);
}
.nav-cta::after { display: none !important; }

/* Language Switcher */
.lang-switcher {
  position: relative;
  margin-left: .5rem;
}
.lang-current {
  display: flex;
  align-items: center;
  gap: .4rem;
  padding: .45rem .8rem;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(255, 255, 255, .1);
  color: var(--text-secondary);
  font-family: var(--font-display);
  font-size: .8rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color .3s, background .3s, color .3s;
  letter-spacing: .5px;
}
.lang-current:hover {
  border-color: var(--accent-cyan);
  color: var(--text-primary);
  background: rgba(0, 212, 255, .06);
}
.lang-current .chevron {
  transition: transform .3s var(--ease-out);
}
.lang-switcher.open .lang-current .chevron {
  transform: rotate(180deg);
}
.lang-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 150px;
  padding: .4rem;
  background: rgba(12, 18, 40, 0.92);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: var(--radius-md);
  box-shadow: 0 12px 40px rgba(0, 0, 0, .5);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity .25s var(--ease-out), transform .25s var(--ease-out), visibility .25s;
  z-index: 1001;
}
.lang-switcher.open .lang-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.lang-option {
  display: flex;
  align-items: center;
  gap: .6rem;
  width: 100%;
  padding: .55rem .8rem;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-size: .85rem;
  font-weight: 500;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: background .2s, color .2s;
}
.lang-option:hover {
  background: rgba(0, 212, 255, .08);
  color: var(--text-primary);
}
.lang-option.active {
  color: var(--accent-cyan);
  background: rgba(0, 212, 255, .06);
}
.lang-flag {
  font-size: 1.1rem;
  line-height: 1;
}

/* Mobile burger */
.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
}
.burger span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: .3s;
}

/* ---------- Hero ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: var(--section-pad);
  position: relative;
}
.hero-content {
  max-width: 780px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .4rem 1rem;
  background: rgba(0, 212, 255, .08);
  border: 1px solid rgba(0, 212, 255, .2);
  border-radius: 999px;
  font-size: .8rem;
  font-weight: 500;
  color: var(--accent-cyan);
  margin-bottom: 2rem;
  animation: fadeInUp .8s var(--ease-out) both;
  position: relative;
  cursor: pointer;
}
.hero-badge .pulse {
  width: 8px;
  height: 8px;
  background: var(--accent-cyan);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

/* Badge hover popup — campus image */
.badge-popup {
  position: absolute;
  bottom: calc(100% + 14px);
  left: calc(100% + 14px);
  width: 360px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: rgba(12, 18, 40, 0.92);
  border: 1px solid rgba(0, 212, 255, .2);
  box-shadow: 0 20px 60px rgba(0, 0, 0, .6), 0 0 30px rgba(0, 212, 255, .08);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px) scale(0.97);
  transition: opacity .35s var(--ease-out), transform .35s var(--ease-out), visibility .35s;
  z-index: 500;
  pointer-events: none;
}
.hero-badge:hover .badge-popup {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}
.badge-popup img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
}
.badge-popup-label {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .75rem 1rem;
  font-family: var(--font-display);
  font-size: .9rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: .5px;
}
.badge-popup-label::before {
  content: '📍';
  font-size: 1rem;
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.75rem, 6vw, 5.5rem);
  font-weight: 800;
  line-height: 1.05;
  margin-bottom: 1.5rem;
  animation: fadeInUp .8s .15s var(--ease-out) both;
}
.hero p {
  font-size: clamp(1.05rem, 1.5vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.8;
  margin-bottom: 2.5rem;
  animation: fadeInUp .8s .3s var(--ease-out) both;
}
.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  animation: fadeInUp .8s .45s var(--ease-out) both;
}
.btn-primary {
  padding: .85rem 2rem;
  border-radius: var(--radius-sm);
  background: var(--grad-hero);
  color: #fff;
  font-weight: 600;
  font-size: .95rem;
  border: none;
  cursor: pointer;
  transition: transform .25s var(--ease-out), box-shadow .25s;
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(0, 212, 255, .3);
}
.btn-outline {
  padding: .85rem 2rem;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid rgba(255,255,255,.15);
  color: var(--text-primary);
  font-weight: 600;
  font-size: .95rem;
  cursor: pointer;
  transition: border-color .3s, background .3s, transform .25s var(--ease-out);
}
.btn-outline:hover {
  border-color: var(--accent-cyan);
  background: rgba(0, 212, 255, .06);
  transform: translateY(-3px);
}

/* Hero glow orbs */
.hero-glow {
  position: absolute;
  top: 15%;
  right: 5%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0,212,255,.12) 0%, rgba(139,92,246,.06) 40%, transparent 70%);
  border-radius: 50%;
  filter: blur(80px);
  animation: float 8s ease-in-out infinite;
  pointer-events: none;
}

/* ---------- Stats Ticker ---------- */
.stats-bar {
  padding: 3rem 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.stats-bar .container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  padding: 0 clamp(1.5rem, 5vw, 6rem);
}
.stat-item {
  text-align: center;
}
.stat-number {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 700;
  color: var(--accent-cyan);
}
.stat-label {
  font-size: .85rem;
  color: var(--text-dim);
  margin-top: .25rem;
}

/* ---------- Section: About ---------- */
.about {
  padding: var(--section-pad);
}
.about .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
  padding: 0 clamp(1.5rem, 5vw, 6rem);
}
.about-visual {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  max-width: 520px;
}
.about-grid-animation {
  width: 100%;
  height: 100%;
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
}
.about-grid-animation canvas {
  width: 100%;
  height: 100%;
}

/* ---------- Section: Solutions ---------- */
.solutions {
  padding: var(--section-pad);
  background: var(--bg-secondary);
}
.solutions .container {
  padding: 0 clamp(1.5rem, 5vw, 6rem);
}
.solutions-header {
  text-align: center;
  margin-bottom: 4rem;
}
.solutions-header .section-subtitle {
  margin: 0 auto;
}
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.sol-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  backdrop-filter: blur(12px);
  transition: transform .4s var(--ease-out), border-color .4s, box-shadow .4s;
  position: relative;
  overflow: hidden;
}
.sol-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--grad-hero);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .4s var(--ease-out);
}
.sol-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  box-shadow: 0 16px 48px rgba(0, 0, 0, .4), 0 0 40px rgba(0, 212, 255, .06);
}
.sol-card:hover::before { transform: scaleX(1); }
.sol-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: grid;
  place-items: center;
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  background: rgba(0, 212, 255, .08);
  border: 1px solid rgba(0, 212, 255, .15);
  color: var(--accent-cyan);
}
.sol-card h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: .75rem;
}
.sol-card p {
  color: var(--text-secondary);
  font-size: .93rem;
  line-height: 1.7;
}

/* icon colour variants */
.sol-icon.purple { background: rgba(139,92,246,.1); border-color: rgba(139,92,246,.2); color: var(--accent-purple); }
.sol-icon.emerald { background: rgba(52,211,153,.1); border-color: rgba(52,211,153,.2); color: var(--accent-emerald); }
.sol-icon.hot { background: rgba(244,114,182,.1); border-color: rgba(244,114,182,.2); color: var(--accent-hot); }
.sol-icon.blue { background: rgba(59,130,246,.1); border-color: rgba(59,130,246,.2); color: var(--accent-blue); }

/* ---------- Section: Infrastructure ---------- */
.infrastructure {
  padding: var(--section-pad);
}
.infrastructure .container {
  padding: 0 clamp(1.5rem, 5vw, 6rem);
}
.infra-header {
  text-align: center;
  margin-bottom: 4rem;
}
.infra-header .section-subtitle { margin: 0 auto; }
.infra-timeline {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}
.infra-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  position: relative;
  transition: border-color .4s, transform .4s var(--ease-out);
}
.infra-item:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
}
.infra-number {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 800;
  color: rgba(0, 212, 255, .12);
  position: absolute;
  top: 1.25rem;
  right: 1.5rem;
}
.infra-item h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: .75rem;
}
.infra-item p {
  color: var(--text-secondary);
  font-size: .93rem;
}

/* ---------- Section: Partners / Logos ---------- */
.partners {
  padding: 4rem 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}
.partners-title {
  text-align: center;
  font-size: .8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--text-dim);
  margin-bottom: 2rem;
}
.partners-track {
  display: flex;
  gap: 4rem;
  animation: marquee 30s linear infinite;
  width: max-content;
}
.partner-logo {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-dim);
  white-space: nowrap;
  opacity: .5;
  transition: opacity .3s;
}
.partner-logo:hover { opacity: 1; }

/* ---------- Section: CTA ---------- */
.cta-section {
  padding: var(--section-pad);
}
.cta-section .container {
  padding: 0 clamp(1.5rem, 5vw, 6rem);
}
.cta-box {
  background: var(--grad-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: clamp(3rem, 6vw, 5rem);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-box::before {
  content: '';
  position: absolute;
  inset: -50%;
  background: var(--grad-glow);
  opacity: .35;
  pointer-events: none;
}
.cta-box .section-title { position: relative; }
.cta-box .section-subtitle { margin: 0 auto 2.5rem; position: relative; }
.cta-box .btn-primary { position: relative; font-size: 1.05rem; padding: 1rem 2.5rem; }

/* ---------- Footer ---------- */
.footer {
  padding: 4rem 0 2rem;
  border-top: 1px solid var(--border);
}
.footer .container {
  padding: 0 clamp(1.5rem, 5vw, 6rem);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 3rem;
  margin-bottom: 3rem;
}
.footer-brand p {
  color: var(--text-secondary);
  font-size: .9rem;
  margin-top: 1rem;
  max-width: 280px;
}
.footer-col h4 {
  font-family: var(--font-display);
  font-weight: 600;
  margin-bottom: 1rem;
  font-size: .95rem;
}
.footer-col a {
  display: block;
  font-size: .88rem;
  color: var(--text-secondary);
  padding: .3rem 0;
  transition: color .3s;
}
.footer-col a:hover { color: var(--accent-cyan); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  font-size: .82rem;
  color: var(--text-dim);
}

/* ---------- Animations ---------- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(0, 212, 255, .5); }
  50%      { box-shadow: 0 0 0 6px rgba(0, 212, 255, 0); }
}
@keyframes float {
  0%, 100% { transform: translateY(0) scale(1); }
  50%      { transform: translateY(-30px) scale(1.05); }
}
@keyframes marquee {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity .8s var(--ease-out), transform .8s var(--ease-out);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .solutions-grid { grid-template-columns: repeat(2, 1fr); }
  .infra-timeline { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .burger { display: flex; }
  .nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: rgba(6, 8, 15, 0.95);
    backdrop-filter: blur(20px);
    padding: 2rem clamp(1.5rem, 5vw, 6rem);
    gap: 1.5rem;
    border-bottom: 1px solid var(--border);
  }
  .about .container { grid-template-columns: 1fr; }
  .about-visual { max-width: 100%; }
  .solutions-grid { grid-template-columns: 1fr; }
  .stats-bar .container { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: clamp(2.25rem, 8vw, 3.5rem); }
}