/* =============================================
   BACK TO TOP
   ============================================= */
#back-top {
  position: fixed; bottom: 28px; right: 28px; z-index: 900;
  width: 44px; height: 44px; border-radius: 12px;
  background: var(--purple); color: var(--white);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 16px rgba(83,74,183,0.5);
  opacity: 0; pointer-events: none; transform: translateY(12px);
  transition: all var(--t);
}
#back-top.visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
#back-top:hover { background: var(--purple-light); transform: translateY(-2px); }

/* =============================================
   TOAST
   ============================================= */
#toast {
  position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--bg3); border: 1px solid rgba(127,119,221,0.4);
  color: var(--white); padding: 14px 24px; border-radius: 10px;
  font-size: 14px; z-index: 9999; opacity: 0; pointer-events: none;
  transition: all var(--t); white-space: nowrap;
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* =============================================
   SCROLL ANIMATIONS
   ============================================= */
.fade-up {
  opacity: 0; transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.visible { opacity: 1; transform: translateY(0); }
.fade-up-d1 { transition-delay: 0.1s; }
.fade-up-d2 { transition-delay: 0.2s; }
.fade-up-d3 { transition-delay: 0.3s; }
.fade-up-d4 { transition-delay: 0.4s; }
.fade-up-d5 { transition-delay: 0.5s; }

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 1024px) {
  .section { padding: 72px 0; }
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .about-stats { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(2, 1fr); gap: 36px; }
  .process-steps::before { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  :root { --container: 100%; }
  .section { padding: 56px 0; }
  .nav-links, .nav-cta { display: none; }
  .nav-hamburger { display: flex; }
  .services-grid { grid-template-columns: 1fr 1fr; }
  .why-grid { grid-template-columns: 1fr 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .differentiators { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 48px; }
  .form-row { grid-template-columns: 1fr; }
  .testimonial-card { min-width: calc(100% - 20px); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .hero-stats { flex-direction: row; flex-wrap: wrap; }
  .hero-stat { min-width: 50%; }
  .process-steps { grid-template-columns: 1fr; }
}
@media (max-width: 550px) {
  .services-grid { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; }
  .differentiators { grid-template-columns: 1fr; }
  .hero-ctas { flex-direction: column; }
  .hero-ctas .btn { width: 100%; justify-content: center; }
  .footer-grid { grid-template-columns: 1fr; }
  .cta-banner { padding: 40px 24px; }
}

/* =============================================
   REDUCED MOTION
   ============================================= */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  .fade-up { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}