/* ── Base ── */
    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body { margin: 0; -webkit-font-smoothing: antialiased; }

    /* ── Selection ── */
    ::selection { background: rgba(5, 150, 105, 0.15); color: #064e3b; }

    /* ── Scrollbar ── */
    ::-webkit-scrollbar { width: 6px; }
    ::-webkit-scrollbar-track { background: #d1fae5; }
    ::-webkit-scrollbar-thumb { background: #6ee7b7; border-radius: 3px; }
    ::-webkit-scrollbar-thumb:hover { background: #34d399; }

    /* ── Navbar state: transparent over hero, solid on scroll ── */
    #navbar { background: transparent; }
    #navbar.scrolled {
        background: rgba(250, 248, 242, 0.95);
        backdrop-filter: blur(12px);
        box-shadow: 0 1px 0 rgba(6, 95, 70, 0.08);
    }
    #navbar.scrolled .nav-text { color: #064e3b; }
    #navbar.scrolled .nav-subtext { color: #059669; }
    #navbar.scrolled #bar1,
    #navbar.scrolled #bar2,
    #navbar.scrolled #bar3 { background: #064e3b; }

    /* ── Reveal animations (progressive enhancement) ── */
    @media (prefers-reduced-motion: no-preference) {
        .reveal {
            opacity: 1;
            transform: translateY(0);
            transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                        transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }
        .reveal.revealed {
            opacity: 0;
            transform: translateY(24px);
            transition: none;
        }
    }

    /* ── Mobile menu ── */
    #mobile-menu.open {
        opacity: 1;
        pointer-events: auto;
    }
    .mobile-link {
        opacity: 0;
        transform: translateY(8px);
        transition: opacity 0.3s ease, transform 0.3s ease, color 0.3s ease;
    }
    #mobile-menu.open .mobile-link {
        opacity: 1;
        transform: translateY(0);
    }
    #mobile-menu.open .mobile-link:nth-child(1) { transition-delay: 0.05s; }
    #mobile-menu.open .mobile-link:nth-child(2) { transition-delay: 0.1s; }
    #mobile-menu.open .mobile-link:nth-child(3) { transition-delay: 0.15s; }
    #mobile-menu.open .mobile-link:nth-child(4) { transition-delay: 0.2s; }

    /* ── Menu toggle animation ── */
    body.menu-open #bar1 { transform: translateY(4px) rotate(45deg); }
    body.menu-open #bar2 { opacity: 0; }
    body.menu-open #bar3 { transform: translateY(-4px) rotate(-45deg); width: 6px; }

    /* ── Select dropdown arrow ── */
    select {
        background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%23059669' stroke-width='1.5'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
        background-repeat: no-repeat;
        background-position: right 12px center;
        background-size: 16px;
        padding-right: 36px;
    }

    /* ── Focus visible ── */
    :focus-visible {
        outline: 2px solid #34d399;
        outline-offset: 2px;
    }