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

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

    body {
        overflow-x: hidden;
    }

    ::selection {
        background: #0d9488;
        color: white;
    }

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

    #navbar.scrolled .font-serif {
        color: #0f172a;
    }

    /* ─── Service Cards ─── */
    .service-card {
        position: relative;
        overflow: hidden;
    }

    .service-card::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 3px;
        height: 0;
        background: #0d9488;
        transition: height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .service-card:hover::before {
        height: 100%;
    }

    /* ─── Gallery Items ─── */
    .gallery-item {
        position: relative;
        overflow: hidden;
    }

    .gallery-item::after {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(to top, rgba(15, 118, 110, 0.15), transparent);
        opacity: 0;
        transition: opacity 0.4s ease;
    }

    .gallery-item:hover::after {
        opacity: 1;
    }

    /* ─── Scroll Reveal (progressive enhancement) ─── */
    @media (prefers-reduced-motion: no-preference) {
        .reveal {
            opacity: 0;
            transform: translateY(24px);
            transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), transform 0.8s cubic-bezier(0.4, 0, 0.2, 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; }
        .reveal-delay-4 { transition-delay: 0.4s; }
    }

    /* Without JS / reduced motion: all content visible by default */
    @media (prefers-reduced-motion: reduce) {
        .reveal {
            opacity: 1;
            transform: none;
        }
    }

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

    /* ─── Custom Select Styling ─── */
    select option {
        background: white;
        color: #1e293b;
    }

    /* ─── Utility ─── */
    .sr-only {
        position: absolute;
        width: 1px;
        height: 1px;
        padding: 0;
        margin: -1px;
        overflow: hidden;
        clip: rect(0, 0, 0, 0);
        white-space: nowrap;
        border-width: 0;
    }