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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  overflow-x: hidden;
}

/* Scroll dot animation */
@keyframes scrollDot {
  0% { transform: translateY(-100%); opacity: 0; }
  50% { opacity: 1; }
  100% { transform: translateY(100%); opacity: 0; }
}

.animate-scroll-dot {
  animation: scrollDot 1.5s ease-in-out infinite;
}

/* Nav transition */
nav.scrolled .nav-logo-text {
  color: #0f1a2e;
}

nav.scrolled a.text-navy-900 {
  color: #0f1a2e;
}

/* Mobile menu */
#mobile-menu.open {
  transform: translateY(0) !important;
  opacity: 1 !important;
  pointer-events: all !important;
}

#mobile-menu.closed {
  transform: translateY(-10px);
  opacity: 0;
  pointer-events: none;
}

/* Hamburger animation */
#hamburger span:nth-child(1) {
  transform-origin: center;
}
#hamburger span:nth-child(2) {
  transform-origin: center;
}
#hamburger span:nth-child(3) {
  transform-origin: center;
}

#menu-btn.active #hamburger span:nth-child(1) {
  transform: rotate(45deg) translate(4px, 4px);
}
#menu-btn.active #hamburger span:nth-child(2) {
  opacity: 0;
}
#menu-btn.active #hamburger span:nth-child(3) {
  transform: rotate(-45deg) translate(4px, -4px);
  width: 1.5rem;
}

/* Intersection observer fade-in */
.fade-in {
  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);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

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

/* Service card stagger */
.service-card {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.service-card.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Smooth image loading */
img {
  image-rendering: -webkit-optimize-contrast;
}

/* Selection color */
::selection {
  background: #e2b96a;
  color: #0f1a2e;
}

/* Custom scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: #faf8f4;
}
::-webkit-scrollbar-thumb {
  background: #1a2744;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: #243656;
}