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

    html {
        scroll-behavior: smooth;
        scroll-padding-top: 80px;
    }

    body {
        overflow-x: hidden;
    }

    /* Scroll reveal animations - progressive enhancement, only active when JS enables */
    @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);
        }

        .reveal:nth-child(2) { transition-delay: 0.1s; }
        .reveal:nth-child(3) { transition-delay: 0.2s; }
        .reveal:nth-child(4) { transition-delay: 0.3s; }
        .reveal:nth-child(5) { transition-delay: 0.4s; }
        .reveal:nth-child(6) { transition-delay: 0.5s; }
    }

    /* Fallback: ensure content is visible even without JS */
    .js-active .reveal {
        opacity: 1;
        transform: translateY(0);
    }

    /* Subtle grid pattern for dark sections */
    .bg-grid-pattern {
        background-image: linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
                          linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
        background-size: 48px 48px;
    }

    /* Custom scrollbar */
    ::-webkit-scrollbar {
        width: 8px;
    }
    ::-webkit-scrollbar-track {
        background: #0f172a;
    }
    ::-webkit-scrollbar-thumb {
        background: #1e293b;
        border-radius: 4px;
    }
    ::-webkit-scrollbar-thumb:hover {
        background: #334155;
    }

    /* Focus styles */
    a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
        outline: 2px solid #2dd4bf;
        outline-offset: 2px;
    }

    /* Mobile menu transition */
    #mobile-menu {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }
    #mobile-menu.open {
        max-height: 400px;
    }