/* Base & Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  overflow-x: hidden;
}

::selection {
  background: rgba(125, 223, 195, 0.2);
  color: #d5f5e6;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: #0a1628;
}
::-webkit-scrollbar-thumb {
  background: #1e4a70;
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: #7ddfc3;
}

/* Reveal Animations */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* Service Cards */
.service-card {
  transition: background-color 0.4s ease;
}

.service-card:hover {
  background-color: rgba(125, 223, 195, 0.03);
}

/* Navigation */
#nav.scrolled {
  background: rgba(10, 22, 40, 0.92);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(125, 223, 195, 0.06);
}

.nav-link {
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: #7ddfc3;
  transition: width 0.3s ease;
}

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

.nav-link:hover {
  color: #7ddfc3 !important;
}

/* Mobile Menu */
.mobile-link {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.4s ease, transform 0.4s ease, color 0.3s ease;
}

#mobileMenu.open .mobile-link {
  opacity: 1;
  transform: translateY(0);
}

#mobileMenu.open .mobile-link:nth-child(1) { transition-delay: 0.1s; }
#mobileMenu.open .mobile-link:nth-child(2) { transition-delay: 0.15s; }
#mobileMenu.open .mobile-link:nth-child(3) { transition-delay: 0.2s; }
#mobileMenu.open .mobile-link:nth-child(4) { transition-delay: 0.25s; }
#mobileMenu.open .mobile-link:nth-child(5) { transition-delay: 0.3s; }
#mobileMenu.open .mobile-link:nth-child(6) { transition-delay: 0.35s; }

/* Menu Button */
.menu-line {
  transition: transform 0.3s ease, opacity 0.3s ease, width 0.3s ease;
}

#menuBtn.active .menu-line:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}

#menuBtn.active .menu-line:nth-child(2) {
  opacity: 0;
}

#menuBtn.active .menu-line:nth-child(3) {
  transform: translateY(-4px) rotate(-45deg);
  width: 1.5rem;
}

/* Scroll Indicator */
@keyframes scrollIndicator {
  0% { top: -16px; opacity: 1; }
  100% { top: 48px; opacity: 0; }
}

.animate-scroll-indicator {
  animation: scrollIndicator 1.5s ease-in-out infinite;
}

/* Form Focus States */
input:focus, textarea:focus {
  border-color: rgba(125, 223, 195, 0.5) !important;
  box-shadow: 0 0 0 3px rgba(125, 223, 195, 0.08) !important;
}

/* Button hover glow */
button:hover, a:hover {
  cursor: pointer;
}

/* Image hover */
img {
  max-width: 100%;
  height: auto;
}

/* Responsive typography adjustments */
@media (max-width: 640px) {
  .font-serif {
    line-height: 1.05;
  }
}

/* Subtle grain overlay */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.015;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}