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

    body {
        overflow-x: hidden;
    }

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

    /* Scroll reveal animations — progressive enhancement, hidden by default */
    .reveal {
        opacity: 1;
        transform: none;
        transition: opacity 0.6s ease, transform 0.6s ease;
    }

    @media (prefers-reduced-motion: no-preference) {
        .reveal {
            opacity: 0;
            transform: translateY(24px);
        }

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

    /* Custom select arrow */
    select {
        background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='rgba(255,255,255,0.4)' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
        background-repeat: no-repeat;
        background-position: right 1rem center;
    }

    /* Mobile menu transitions */
    #mobileMenu {
        animation: slideDown 0.25s ease;
    }

    @keyframes slideDown {
        from {
            opacity: 0;
            max-height: 0;
        }
        to {
            opacity: 1;
            max-height: 400px;
        }
    }

    /* Nav scroll state */
    #nav.scrolled {
        background: rgba(4, 13, 26, 0.97);
        box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
    }

    /* Subtle card shimmer on hover */
    @media (prefers-reduced-motion: no-preference) {
        .group:hover::after {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: inherit;
            background: linear-gradient(135deg, rgba(74, 222, 128, 0.04) 0%, transparent 60%);
            pointer-events: none;
        }
    }