/* Base & Utilities */
html {
    scroll-behavior: smooth;
}

body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::selection {
    background-color: rgba(74, 222, 128, 0.3);
    color: #e8eef5;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #0a1628;
}
::-webkit-scrollbar-thumb {
    background: #1e4a72;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #2a5f8f;
}

/* Animations */
@keyframes float-slow {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(2deg); }
}

@keyframes float-medium {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-15px) rotate(-2deg); }
}

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

.animate-float-slow {
    animation: float-slow 8s ease-in-out infinite;
}

.animate-float-medium {
    animation: float-medium 6s ease-in-out infinite;
}

.animate-float-fast {
    animation: float-fast 4s ease-in-out infinite;
}

/* Fade-in animation */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards;
}

.fade-in:nth-child(1) { animation-delay: 0.1s; }
.fade-in:nth-child(2) { animation-delay: 0.2s; }
.fade-in:nth-child(3) { animation-delay: 0.3s; }
.fade-in:nth-child(4) { animation-delay: 0.4s; }

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

/* Scroll reveal */
.scroll-reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* Stat cards stagger */
.stat-card {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease forwards;
}

/* Navbar */
.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #4ade80, #22c55e);
    border-radius: 1px;
    transition: width 0.3s ease;
}

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

.nav-link:hover {
    color: #86efac !important;
}

/* Navbar scrolled state */
.nav-scrolled {
    background: rgba(6, 14, 26, 0.92) !important;
    backdrop-filter: blur(20px) !important;
    border-bottom: 1px solid rgba(30, 74, 114, 0.3) !important;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

/* Mobile menu */
.mobile-nav-link {
    display: block;
}

/* Button ripple effect */
button, a {
    -webkit-tap-highlight-color: transparent;
}

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

/* Image loading placeholder */
img {
    background: linear-gradient(135deg, #143555 0%, #0a1628 100%);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .font-serif {
        line-height: 1.15;
    }
}

/* Print styles */
@media print {
    nav, #contact-form, .animate-bounce {
        display: none !important;
    }
    body {
        background: white;
        color: black;
    }
}