*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { margin: 0; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

/* Scroll reveal — progressive enhancement, only active when JS runs and user prefers motion */
.scroll-reveal {
    opacity: 1;
    transform: none;
    transition: opacity 0.7s ease, transform 0.7s ease;
}

@media (prefers-reduced-motion: no-preference) {
    .scroll-reveal.is-hidden {
        opacity: 0;
        transform: translateY(32px);
        transition: opacity 0.7s ease, transform 0.7s ease;
    }
    .scroll-reveal.is-visible {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Header transparent over hero, solid on scroll */
#site-header {
    background: transparent;
}
#site-header.scrolled {
    background: rgba(5, 14, 26, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(126, 212, 184, 0.06);
}

/* Mobile menu transitions */
#mobile-menu.open {
    opacity: 1;
    pointer-events: auto;
}
#mobile-menu.closed {
    opacity: 0;
    pointer-events: none;
}

/* Custom scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #0A1F3F; }
::-webkit-scrollbar-thumb { background: #334E68; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #486381; }

/* Selection color */
::selection { background: rgba(126, 212, 184, 0.25); color: #f0f4f8; }
</style>