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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', system-ui, sans-serif;
  font-weight: 300;
  color: #1e293b;
  background-color: #ffffff;
  overflow-x: hidden;
}

::selection {
  background-color: #0d9488;
  color: #ffffff;
}

/* Scroll reveal base — content always visible, animation applied via JS */
.reveal {
  opacity: 1;
  transform: none;
  transition: opacity 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.reveal.revealed {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(24px);
  }

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

/* Hero staggered entrance */
.hero-elem {
  opacity: 1;
  transform: none;
  transition: opacity 0.6s ease, transform 0.6s ease;
}

@media (prefers-reduced-motion: no-preference) {
  .hero-elem {
    opacity: 0;
    transform: translateY(20px);
  }

  .hero-elem:nth-child(1) { transition-delay: 0.1s; }
  .hero-elem:nth-child(2) { transition-delay: 0.25s; }
  .hero-elem:nth-child(3) { transition-delay: 0.4s; }
  .hero-elem:nth-child(4) { transition-delay: 0.55s; }
  .hero-elem.revealed {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Service card hover */
.service-card {
  position: relative;
  overflow: hidden;
}

.service-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: #0d9488;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.service-card:hover::after {
  transform: scaleX(1);
}

/* Navbar transitions */
.nav-text-color {
  color: #475569;
  transition: color 0.5s ease;
}

.nav-link-color {
  color: #64748b;
  transition: color 0.5s ease;
}

.nav-icon-color {
  color: #475569;
  transition: color 0.5s ease;
}

nav.scrolled .nav-text-color {
  color: #f1f5f9;
}

nav.scrolled .nav-link-color {
  color: #94a3b8;
}

nav.scrolled .nav-icon-color {
  color: #f1f5f9;
}

/* Mobile menu */
.mobile-menu-link {
  opacity: 1;
  transform: none;
}

#mobile-menu.open {
  opacity: 1;
  pointer-events: all;
}

#mobile-menu.open .mobile-menu-link {
  animation: fadeInUp 0.4s ease forwards;
}

#mobile-menu.open .mobile-menu-link:nth-child(1) { animation-delay: 0.05s; }
#mobile-menu.open .mobile-menu-link:nth-child(2) { animation-delay: 0.1s; }
#mobile-menu.open .mobile-menu-link:nth-child(3) { animation-delay: 0.15s; }
#mobile-menu.open .mobile-menu-link:nth-child(4) { animation-delay: 0.2s; }
#mobile-menu.open .mobile-menu-link:nth-child(5) { animation-delay: 0.25s; }

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Smooth focus styles */
input:focus,
select:focus,
textarea:focus,
button:focus {
  outline: none;
}

/* Form focus ring */
input:focus,
select:focus,
textarea:focus {
  box-shadow: 0 0 0 1px #0d9488;
}

/* Subtle image hover */
img {
  transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Print styles */
@media print {
  nav, #mobile-menu, .reveal { display: block; opacity: 1; }
  .hero-elem { opacity: 1; transform: none; }
}