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

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

    body {
        overflow-x: hidden;
    }

    ::selection {
        background: #115e59;
        color: #f0fdfa;
    }

    /* ── Hero Animations ── */
    .hero-subtitle {
        opacity: 0;
        animation: fadeUp 0.8s ease forwards;
        animation-delay: 0.3s;
    }

    .hero-title {
        opacity: 0;
        animation: fadeUp 0.8s ease forwards;
        animation-delay: 0.6s;
    }

    .hero-body {
        opacity: 0;
        animation: fadeUp 0.8s ease forwards;
        animation-delay: 0.9s;
    }

    .hero-buttons {
        opacity: 0;
        animation: fadeUp 0.8s ease forwards;
        animation-delay: 1.2s;
    }

    @keyframes fadeUp {
        from {
            opacity: 0;
            transform: translateY(30px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    /* ── Scroll Reveal (below fold only) ── */
    .reveal {
        opacity: 1;
        transform: translateY(0);
        transition: opacity 0.7s ease, transform 0.7s ease;
    }

    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }

    /* Default state: visible — JS adds .revealed for animation */
    .reveal[data-reveal] {
        opacity: 1;
        transform: translateY(0);
    }

    @media (prefers-reduced-motion: no-preference) {
        .reveal[data-reveal] {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.7s ease, transform 0.7s ease;
        }

        .reveal[data-reveal].revealed {
            opacity: 1;
            transform: translateY(0);
        }
    }

    /* ── Service Cards ── */
    .service-card {
        transition: transform 0.4s ease, box-shadow 0.4s ease;
    }

    .service-card:hover {
        transform: translateY(-4px);
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
    }

    /* ── Gallery Items ── */
    .gallery-item {
        cursor: pointer;
    }

    /* ── Navbar ── */
    #navbar.scrolled {
        background: rgba(15, 23, 42, 0.95);
        backdrop-filter: blur(12px);
        box-shadow: 0 1px 0 rgba(255, 255, 255, 0.05);
    }

    /* ── Mobile Menu ── */
    #mobile-menu {
        animation: slideDown 0.3s ease;
    }

    @keyframes slideDown {
        from {
            opacity: 0;
            max-height: 0;
        }
        to {
            opacity: 1;
            max-height: 500px;
        }
    }

    .mobile-link {
        display: block;
        padding: 0.5rem 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

    .mobile-link:last-child {
        border-bottom: none;
    }

    /* ── Scroll Indicator ── */
    .scroll-indicator {
        animation: fadeInOut 2s ease infinite;
    }

    @keyframes fadeInOut {
        0%, 100% { opacity: 0.4; }
        50% { opacity: 0.8; }
    }

    /* ── Testimonial Cards ── */
    .testimonial-card {
        transition: transform 0.4s ease, border-color 0.4s ease;
    }

    .testimonial-card:hover {
        transform: translateY(-4px);
        border-color: rgba(255, 255, 255, 0.2);
    }

    /* ── 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;
    }