/* ============================================================
   LAYOUT — Backgrounds, Navbar, Hero, Section shells, Footer
   ============================================================ */

/* ── Background layers ─────────────────────────────────────── */
.bg-mesh {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 60% at 20% 10%,  rgba(0, 100, 200, 0.22) 0%, transparent 65%),
    radial-gradient(ellipse 60% 50% at 80% 80%,  rgba(0, 229, 255, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse 50% 40% at 50% 50%,  rgba(10,  30,  80, 0.50) 0%, transparent 80%),
    linear-gradient(160deg, #050a1a 0%, #080f22 40%, #050d1e 100%);
  animation: meshShift 18s ease-in-out infinite alternate;
}

.bg-grid {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.035;
  background-image:
    linear-gradient(rgba(0, 229, 255, 1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 255, 1) 1px, transparent 1px);
  background-size: 60px 60px;
}

/* ── Navbar ────────────────────────────────────────────────── */
nav.main-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px var(--space-xl);
  background: rgba(5, 10, 26, 0.70);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(0, 229, 255, 0.12);
  transition: padding var(--transition-normal);
}
nav.main-nav.scrolled { padding: 12px var(--space-xl); }

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: 0.04em;
  color: var(--white);
}
.nav-logo .logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, #0a2a5e, #00e5ff);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: 0 0 18px rgba(0, 229, 255, 0.40);
}
.nav-logo .accent { color: var(--cyan); }

.nav-links {
  display: flex;
  gap: 36px;
}
.nav-links a {
  color: var(--white-60);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: color var(--transition-fast);
}
.nav-links a:hover { color: var(--cyan); }

/* ── Hero ──────────────────────────────────────────────────── */
.hero {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px var(--space-xl) 80px;
  overflow: hidden;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
  max-width: 1280px;
  width: 100%;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.hero-stats {
  display: flex;
  gap: 36px;
  padding-top: 12px;
  border-top: 1px solid var(--white-10);
  flex-wrap: wrap;
}

.stat { display: flex; flex-direction: column; }
.stat-num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.7rem;
  color: var(--cyan);
  line-height: 1;
}
.stat-label {
  font-size: 0.78rem;
  color: var(--white-60);
  margin-top: 4px;
  letter-spacing: 0.05em;
}

/* Hero card column */
.hero-card-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  perspective: 1200px;
}

/* ── Ambient orbs ──────────────────────────────────────────── */
.orb {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  filter: blur(60px);
}
.orb-1 {
  width: 500px; height: 500px;
  top: -100px; left: -150px;
  background: radial-gradient(circle, rgba(0, 80, 220, 0.28), transparent 70%);
  animation: floatOrb 14s ease-in-out infinite;
}
.orb-2 {
  width: 400px; height: 400px;
  bottom: -80px; right: -100px;
  background: radial-gradient(circle, rgba(0, 229, 255, 0.18), transparent 70%);
  animation: floatOrb 18s ease-in-out infinite reverse;
}
.orb-3 {
  width: 300px; height: 300px;
  top: 40%; right: 15%;
  background: radial-gradient(circle, rgba(0, 40, 140, 0.25), transparent 70%);
  animation: floatOrb 22s ease-in-out infinite 5s;
}

/* ── Features strip ────────────────────────────────────────── */
.features-strip {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  padding: 0 var(--space-xl) 80px;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 28px 36px;
  border-right: 1px solid var(--white-10);
  flex: 1;
  min-width: 220px;
}
.feature-item:last-child { border-right: none; }

.feature-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  flex-shrink: 0;
  background: rgba(0, 229, 255, 0.10);
  border: 1px solid rgba(0, 229, 255, 0.20);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
}
.feature-text strong {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--white);
  margin-bottom: 3px;
}
.feature-text span { font-size: 0.80rem; color: var(--white-60); }

/* ── Tinted section variants ───────────────────────────────── */
.section-tinted {
  background: rgba(0, 10, 30, 0.40);
  border-top:    1px solid var(--white-06);
  border-bottom: 1px solid var(--white-06);
}

/* ── Process ───────────────────────────────────────────────── */
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: var(--space-xl);
  position: relative;
}
.process-steps::before {
  content: '';
  position: absolute;
  top: 44px;
  left: 12.5%;
  right: 12.5%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), var(--cyan), transparent);
  opacity: 0.25;
}

.step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 0 20px;
}
.step-num {
  width: 88px; height: 88px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(0, 60, 180, 0.60), rgba(0, 229, 255, 0.30));
  border: 1px solid rgba(0, 229, 255, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.6rem;
  color: var(--cyan);
  margin-bottom: 24px;
  position: relative;
  z-index: 1;
  box-shadow: 0 0 30px rgba(0, 229, 255, 0.15), 0 0 0 8px rgba(0, 229, 255, 0.05);
}
.step-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--white);
  margin-bottom: 10px;
}
.step-desc { font-size: 0.83rem; color: var(--white-60); line-height: 1.65; }

/* ── Why-us grid ───────────────────────────────────────────── */
.why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: var(--space-xl);
}

/* ── CTA band ──────────────────────────────────────────────── */
.cta-band {
  border-radius: var(--radius-xl);
  padding: 70px 80px;
  background: linear-gradient(135deg, rgba(0, 40, 120, 0.90), rgba(0, 15, 50, 0.95));
  border: 1px solid rgba(0, 229, 255, 0.25);
  backdrop-filter: blur(20px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  box-shadow: 0 40px 100px rgba(0, 0, 0, 0.50), 0 0 80px rgba(0, 229, 255, 0.06);
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 229, 255, 0.60), transparent);
}
.cta-band-copy { max-width: 560px; }
.cta-band-copy h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 2.2rem;
  line-height: 1.15;
  color: var(--white);
  margin-bottom: 14px;
}
.cta-band-copy h2 span { color: var(--cyan); }
.cta-band-copy p { font-size: 1rem; color: var(--white-60); line-height: 1.7; }
.cta-band-actions { display: flex; flex-direction: column; gap: 14px; }

/* ── Footer ────────────────────────────────────────────────── */
footer {
  position: relative;
  z-index: 1;
  padding: 70px var(--space-xl) 40px;
  border-top: 1px solid var(--white-06);
  background: rgba(0, 5, 15, 0.60);
}
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}
.footer-brand p {
  font-size: 0.88rem;
  color: var(--white-60);
  line-height: 1.75;
  max-width: 280px;
  margin-top: 18px;
}
.footer-contact {
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footer-contact span {
  font-size: 0.85rem;
  color: var(--white-60);
  display: flex;
  align-items: center;
  gap: 8px;
}
.footer-contact a { transition: color var(--transition-fast); }
.footer-contact a:hover { color: var(--cyan); }

.footer-col h4 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.90rem;
  color: var(--white);
  margin-bottom: 20px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.footer-col ul { display: flex; flex-direction: column; gap: 12px; }
.footer-col ul a {
  font-size: 0.87rem;
  color: var(--white-60);
  display: flex;
  align-items: center;
  gap: 6px;
  transition: color var(--transition-fast);
}
.footer-col ul a::before { content: '→'; font-size: 0.70rem; opacity: 0; transition: opacity var(--transition-fast); }
.footer-col ul a:hover { color: var(--cyan); }
.footer-col ul a:hover::before { opacity: 1; }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid var(--white-06);
}
.footer-bottom p { font-size: 0.82rem; color: var(--white-60); }
.footer-bottom p span { color: var(--cyan); }

.social-links { display: flex; gap: 14px; }
.social-link {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: var(--white-06);
  border: 1px solid var(--white-10);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}
.social-link:hover {
  background: rgba(0, 229, 255, 0.12);
  border-color: rgba(0, 229, 255, 0.30);
}

/* ── Hamburger button ──────────────────────────────────────── */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px; height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 102;
  flex-shrink: 0;
}
.hamburger span {
  display: block;
  width: 100%; height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
  transform-origin: center;
}
/* × when open */
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav backdrop */
.nav-backdrop {
  display: none;
  position: fixed; inset: 0;
  z-index: 98;
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(2px);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.nav-backdrop.open { opacity: 1; }

/* Desktop-only CTA */
.mobile-nav-cta { display: none; }

/* ── Tablet ─────────────────────────────────────────────────── */
@media (max-width: 1100px) {
  .hero-inner     { grid-template-columns: 1fr; gap: 40px; }
  .why-grid       { grid-template-columns: 1fr 1fr; }
  .process-steps  { grid-template-columns: 1fr 1fr; }
  .footer-inner   { grid-template-columns: 1fr 1fr; gap: 32px; }
  .university-row { flex-direction: column; }
}

/* ── Mobile ─────────────────────────────────────────────────── */
@media (max-width: 768px) {
  /* Nav */
  nav.main-nav {
    padding: 14px 20px;
  }
  .hamburger   { display: flex; }
  .desktop-cta { display: none; }
  .nav-backdrop { display: block; pointer-events: none; }
  .nav-backdrop.open { pointer-events: all; }

  /* Slide-in mobile menu */
  .nav-links {
    display: flex !important;         /* override any inline hide */
    flex-direction: column;
    gap: 0;
    position: fixed;
    top: 0; right: 0;
    width: min(300px, 85vw);
    height: 100vh;
    background: #080f22;
    border-left: 1px solid rgba(0,229,255,0.15);
    padding: 80px 28px 40px;
    z-index: 99;
    transform: translateX(100%);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
  }
  .nav-links.open { transform: translateX(0); }
  .nav-links li { border-bottom: 1px solid rgba(255,255,255,0.06); }
  .nav-links a {
    display: block;
    padding: 16px 0;
    font-size: 1rem;
    color: var(--white-80);
    letter-spacing: 0.04em;
  }
  .nav-links a:hover { color: var(--cyan); }
  .mobile-nav-cta {
    display: block;
    border-bottom: none !important;
    margin-top: 24px;
  }
  .mobile-nav-cta a {
    padding: 0 !important;
    display: inline-flex !important;
    width: 100%;
    justify-content: center;
  }

  /* Sections */
  section,
  .hero,
  footer { padding-left: 20px; padding-right: 20px; }
  .features-strip { padding-left: 20px; padding-right: 20px; }

  /* Hero */
  .hero { padding-top: 100px; padding-bottom: 60px; }
  .hero-inner { gap: 36px; }
  .hero-title { font-size: 2.4rem; }
  .hero-stats { gap: 16px; flex-wrap: wrap; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn-primary,
  .hero-actions .btn-outline { width: 100%; justify-content: center; }
  .hero-card { padding: 28px 22px; }

  /* Features strip */
  .features-strip { flex-direction: column; gap: 0; }
  .feature-item {
    border-right: none;
    border-bottom: 1px solid var(--white-10);
    padding: 20px 16px;
  }
  .feature-item:last-child { border-bottom: none; }

  /* Grids → single column */
  .why-grid,
  .process-steps   { grid-template-columns: 1fr; }
  .process-steps::before { display: none; }

  /* Footer */
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  footer { padding-top: 48px; padding-bottom: 28px; }
  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  /* CTA band */
  .cta-band { flex-direction: column; padding: 36px 24px; text-align: center; }
  .cta-band-copy h2 { font-size: 1.6rem; }
  .cta-band-actions { width: 100%; }
  .cta-band-actions .btn-primary,
  .cta-band-actions .btn-outline { width: 100%; justify-content: center; }
  .contact-row { justify-content: center; }

  /* Gallery */
  .gallery-tabs { gap: 8px; }
  .gallery-tab  { padding: 10px 20px; font-size: 0.82rem; }
}

/* ── Small phones ───────────────────────────────────────────── */
@media (max-width: 480px) {
  .hero-title { font-size: 2rem; }
  .section-title { font-size: 1.7rem; }
  .hero-card { padding: 24px 18px; }
  .form-row { grid-template-columns: 1fr; }
  .stat-num { font-size: 1.4rem; }
}