/* ─── Base & Typography ─── */
html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  overflow-x: hidden;
}

::selection {
  background: rgba(31, 168, 110, 0.2);
  color: #0A1628;
}

/* ─── Hero Gradient ─── */
.hero-gradient {
  background: linear-gradient(135deg, #0A1628 0%, #0F2140 30%, #142C58 50%, #0A1628 80%, #050A18 100%);
}

/* ─── Navbar ─── */
#navbar {
  background: transparent;
  transition: background 0.4s ease, box-shadow 0.4s ease, padding 0.4s ease;
}

#navbar.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 rgba(10, 22, 40, 0.06);
  padding-top: 0;
  padding-bottom: 0;
}

.nav-logo {
  transition: color 0.3s ease;
}

#navbar:not(.scrolled) .nav-logo {
  color: #ffffff;
}

#navbar.scrolled .nav-logo {
  color: #0A1628;
}

.nav-link {
  color: rgba(255, 255, 255, 0.75);
  transition: color 0.3s ease;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: #45C08E;
  transition: width 0.3s ease;
}

.nav-link:hover {
  color: #ffffff;
}

.nav-link:hover::after {
  width: 100%;
}

#navbar.scrolled .nav-link {
  color: #142C58;
}

#navbar.scrolled .nav-link:hover {
  color: #0A1628;
}

.nav-menu-btn {
  color: #ffffff;
  transition: color 0.3s ease;
}

#navbar.scrolled .nav-menu-btn {
  color: #0A1628;
}

/* ─── Mobile Menu ─── */
.mobile-menu-link {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

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

#mobileMenu.closed {
  opacity: 0;
  pointer-events: none;
}

#mobileMenu.closed .mobile-menu-link {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

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

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, #1FA86E, #45C08E);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s ease;
}

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

/* ─── Scroll Reveal ─── */
.reveal {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  html {
    scroll-behavior: auto;
  }
  .service-card::before {
    transform: scaleX(0);
  }
  .service-card:hover::before {
    transform: scaleX(1);
  }
  img {
    transition: none;
  }
}

/* ─── Form ─── */
input::placeholder,
textarea::placeholder {
  color: #CBD5E1;
}

input:focus,
textarea:focus {
  border-color: #1FA86E !important;
}

/* ─── Smooth Image Loading ─── */
img {
  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
}

/* ─── Custom Scrollbar ─── */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: #F8FAFC;
}

::-webkit-scrollbar-thumb {
  background: #CBD5E1;
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: #94A3B8;
}