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

    html {
        scroll-behavior: smooth;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }

    body {
        margin: 0;
        overflow-x: hidden;
    }

    ::selection {
        background: color-mix(in srgb, #2fa898 20%, transparent);
        color: #0a1628;
    }

    /* ── Scroll Reveal (progressive enhancement) ── */
    @media (prefers-reduced-motion: no-preference) {
        .reveal-up,
        .reveal-left,
        .reveal-right {
            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-left {
            transform: translateX(-24px);
        }

        .reveal-right {
            transform: translateX(24px);
        }

        .reveal-up.visible,
        .reveal-left.visible,
        .reveal-right.visible {
            opacity: 1;
            transform: translate(0, 0);
        }

        /* Stagger children */
        .service-card {
            opacity: 0;
            transform: translateY(16px);
            transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1),
                        transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
        }

        .service-card.visible {
            opacity: 1;
            transform: translateY(0);
        }
    }

    /* ── Navbar ── */
    #navbar.scrolled {
        background: rgba(255, 255, 255, 0.97);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        box-shadow: 0 1px 0 rgba(10, 22, 40, 0.06);
    }

    #navbar.scrolled .nav-link {
        color: #0a1628;
    }

    #navbar.scrolled .mobile-link {
        color: #0a1628;
    }

    #navbar.scrolled .menu-line {
        background: #0a1628;
    }

    #navbar.scrolled .font-serif.nav-link {
        color: #0a1628;
    }

    /* ── Mobile Menu ── */
    #mobile-menu.open {
        opacity: 1;
        pointer-events: all;
    }

    #mobile-menu.open .mobile-link {
        animation: fadeDown 0.4s cubic-bezier(0.22, 1, 0.36, 1) forwards;
    }

    #mobile-menu.open .mobile-link:nth-child(1) { animation-delay: 0.05s; }
    #mobile-menu.open .mobile-link:nth-child(2) { animation-delay: 0.1s; }
    #mobile-menu.open .mobile-link:nth-child(3) { animation-delay: 0.15s; }
    #mobile-menu.open .mobile-link:nth-child(4) { animation-delay: 0.2s; }

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

    /* ── Menu Toggle ── */
    body.menu-open .menu-line:first-child {
        transform: rotate(45deg) translate(3px, 3px);
    }

    body.menu-open .menu-line:last-child {
        transform: rotate(-45deg) translate(3px, -3px);
    }

    /* ── Buttons ── */
    a, button {
        cursor: pointer;
    }

    /* ── Form ── */
    input:focus,
    textarea:focus {
        outline: none;
        border-color: #4dc4b2 !important;
        box-shadow: 0 0 0 3px rgba(77, 196, 178, 0.1);
    }

    /* ── Subtle hover on images ── */
    .aspect-\[3\/4\] img,
    .aspect-\[4\/5\] img {
        transition: transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
    }

    .aspect-\[3\/4\]:hover img,
    .aspect-\[4\/5\]:hover img {
        transform: scale(1.02);
    }

    /* ── Utility ── */
    .nav-link {
        color: rgba(10, 22, 40, 0.7);
        transition: color 0.3s ease;
    }

    .mobile-link {
        color: rgba(10, 22, 40, 0.7);
        transition: color 0.3s ease;
    }