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

    html {
        scroll-behavior: smooth;
    }

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

    /* Scroll reveal animations - progressive enhancement via JS */
    .reveal-up, .reveal-left, .reveal-right {
        opacity: 1;
        transform: none;
        transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
    }

    @media (prefers-reduced-motion: no-preference) {
        .reveal-up {
            opacity: 0;
            transform: translateY(30px);
        }
        .reveal-left {
            opacity: 0;
            transform: translateX(-30px);
        }
        .reveal-right {
            opacity: 0;
            transform: translateX(30px);
        }
        .reveal-up.revealed,
        .reveal-left.revealed,
        .reveal-right.revealed {
            opacity: 1;
            transform: none;
        }
    }

    /* Custom scrollbar */
    ::-webkit-scrollbar {
        width: 8px;
    }
    ::-webkit-scrollbar-track {
        background: #0a1929;
    }
    ::-webkit-scrollbar-thumb {
        background: #2da86e;
        border-radius: 4px;
    }
    ::-webkit-scrollbar-thumb:hover {
        background: #54c58d;
    }

    /* Selection color */
    ::selection {
        background: rgba(45, 168, 110, 0.3);
        color: #f0f4f8;
    }

    /* Navbar transition */
    #navbar {
        transition: background-color 0.4s ease, backdrop-filter 0.4s ease, box-shadow 0.4s ease;
    }

    #navbar.scrolled {
        background-color: rgba(10, 25, 41, 0.95);
        backdrop-filter: blur(20px);
        box-shadow: 0 1px 0 rgba(255, 255, 255, 0.05);
    }

    /* Hero gradient animation */
    @keyframes gradient-shift {
        0%, 100% { background-position: 0% 50%; }
        50% { background-position: 100% 50%; }
    }

    /* Mobile menu animation */
    #mobile-menu {
        animation: slideDown 0.3s ease forwards;
    }

    @keyframes slideDown {
        from {
            opacity: 0;
            transform: translateY(-10px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    /* Link underline animation */
    .nav-link {
        position: relative;
    }

    .nav-link::after {
        content: '';
        position: absolute;
        bottom: -2px;
        left: 0;
        width: 0;
        height: 1px;
        background: currentColor;
        transition: width 0.3s ease;
    }

    .nav-link:hover::after {
        width: 100%;
    }

    /* Focus styles */
    a:focus-visible,
    button:focus-visible,
    input:focus-visible,
    textarea:focus-visible {
        outline: 2px solid #54c58d;
        outline-offset: 2px;
    }
</style>