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

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

body {
    overflow-x: hidden;
}

/* Scroll Reveal - Progressive Enhancement */
.reveal {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(30px);
    }
    
    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
    
    .reveal:nth-child(2) { transition-delay: 100ms; }
    .reveal:nth-child(3) { transition-delay: 200ms; }
    .reveal:nth-child(4) { transition-delay: 300ms; }
    .reveal:nth-child(5) { transition-delay: 400ms; }
    .reveal:nth-child(6) { transition-delay: 500ms; }
}

/* Floating Cards Animation */
.floating-card {
    animation: float 6s ease-in-out infinite;
}

.floating-card:nth-child(2) {
    animation-delay: -3s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

/* Service Card Hover */
.service-card {
    transition: transform 0.5s ease, border-color 0.5s ease, box-shadow 0.5s ease;
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

/* Navigation */
#site-header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(10, 22, 40, 0.05);
}

#site-header.scrolled {
    box-shadow: 0 4px 30px rgba(10, 22, 40, 0.08);
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: #34D399;
    transition: width 0.3s ease;
}

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

/* Mobile Menu */
#mobile-menu {
    box-shadow: 0 20px 60px rgba(10, 22, 40, 0.15);
}

.mobile-nav-link {
    position: relative;
}

.mobile-nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 1px;
    background: #34D399;
    transition: width 0.3s ease;
}

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

/* Focus States */
input:focus,
textarea:focus,
button:focus {
    outline: none;
}

/* Selection */
::selection {
    background: rgba(52, 211, 153, 0.2);
}

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

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #F0FDFA;
}

::-webkit-scrollbar-thumb {
    background: #0A1628;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #162A4A;
}