*, *::before, *::after {
        box-sizing: border-box;
    }

    html {
        scroll-behavior: smooth;
        scroll-padding-top: 64px;
    }

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

    ::selection {
        background: rgba(64, 224, 208, 0.2);
        color: #0A1628;
    }

    /* Mobile menu animation */
    #mobile-menu {
        animation: slideDown 0.25s ease-out;
    }

    @keyframes slideDown {
        from {
            opacity: 0;
            transform: translateY(-8px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    /* Scroll reveal — progressive enhancement, hidden by default */
    @media (prefers-reduced-motion: no-preference) {
        .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.revealed {
            opacity: 1;
            transform: translateY(0);
        }
    }

    /* Reduced motion: ensure everything is visible */
    @media (prefers-reduced-motion: reduce) {
        .reveal {
            opacity: 1;
            transform: none;
        }

        html {
            scroll-behavior: auto;
        }
    }

    /* Focus styles */
    a:focus-visible,
    button:focus-visible,
    input:focus-visible,
    textarea:focus-visible {
        outline: 2px solid #40E0D0;
        outline-offset: 2px;
    }

    /* Custom scrollbar */
    ::-webkit-scrollbar {
        width: 8px;
    }

    ::-webkit-scrollbar-track {
        background: #f0f3f8;
    }

    ::-webkit-scrollbar-thumb {
        background: #b8c4df;
        border-radius: 4px;
    }

    ::-webkit-scrollbar-thumb:hover {
        background: #8fa3cf;
    }