/* 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;
}

/* Smooth scroll offset for fixed nav */
section[id] {
    scroll-margin-top: 80px;
}

/* Navbar transitions */
#navbar.scrolled .nav-text {
    color: #1e293b;
}

#navbar.scrolled .nav-link {
    color: #475569;
}

#navbar.light .nav-text {
    color: #f8fafc;
}

#navbar.light .nav-link {
    color: #94a3b8;
}

#navbar.light .nav-cta {
    border-color: rgba(255,255,255,0.4);
    color: white;
}

#navbar.light .nav-cta:hover {
    background: white;
    color: #0f172a;
}

/* Mobile menu */
.mobile-nav-link {
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

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

#mobile-menu.open .mobile-nav-link:nth-child(1) { transition-delay: 0.05s; }
#mobile-menu.open .mobile-nav-link:nth-child(2) { transition-delay: 0.1s; }
#mobile-menu.open .mobile-nav-link:nth-child(3) { transition-delay: 0.15s; }

/* Scroll reveal animations (below-fold only) */
.reveal {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

/* Selection */
::selection {
    background: rgba(13, 148, 136, 0.15);
    color: #134e4a;
}

/* 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;
}