/* ── Base & Utilities ── */
    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 80px; }
    body { overflow-x: hidden; }

    /* ── Scroll Reveal ── */
    @media (prefers-reduced-motion: no-preference) {
        .reveal {
            opacity: 0;
            transform: translateY(32px);
            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-delay-1 { transition-delay: 0.1s; }
        .reveal-delay-2 { transition-delay: 0.2s; }
        .reveal-delay-3 { transition-delay: 0.3s; }
    }

    /* Fallback: content visible without JS */
    .reveal { opacity: 1; transform: none; }

    /* ── Navbar scroll state ── */
    #navbar.scrolled {
        background: rgba(2, 6, 23, 0.97);
        box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
    }

    /* ── Custom scrollbar ── */
    ::-webkit-scrollbar { width: 8px; }
    ::-webkit-scrollbar-track { background: #0f172a; }
    ::-webkit-scrollbar-thumb { background: #14b8a6; border-radius: 4px; }
    ::-webkit-scrollbar-thumb:hover { background: #2dd4bf; }

    /* ── Selection ── */
    ::selection { background: rgba(13, 148, 136, 0.3); color: #f8fafc; }