*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { margin: 0; }

/* Scroll reveal base — content always visible */
.reveal { opacity: 1; transform: none; transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.revealed { opacity: 1; transform: none; }

@media (prefers-reduced-motion: no-preference) {
    .reveal[data-reveal] {
        opacity: 0;
        transform: translateY(24px);
        transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
    }
    .reveal[data-reveal].revealed {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Mobile menu */
#mobile-menu { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
#mobile-menu.open { max-height: 500px; }

/* Navbar shadow on scroll */
nav.scrolled { box-shadow: 0 1px 12px rgba(0,0,0,0.08); }

/* Selection color */
::selection { background: #14b8a6; color: white; }

/* Custom scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #f1f5f9; }
::-webkit-scrollbar-thumb { background: #94a3b8; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #64748b; }

/* Form focus states */
input:focus, select:focus, textarea:focus { outline: none; }

/* Image aspect ratio helpers */
.aspect-card { aspect-ratio: 4/3; }

/* Smooth image loading */
img { loading: lazy; }