/* ── Reset & Base ──────────────────────────────────────────────────────────── */
    *, *::before, *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }

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

    body {
        overflow-x: hidden;
    }

    ::selection {
        background: rgba(13, 148, 136, 0.4);
        color: #f0fdfa;
    }

    img {
        display: block;
        max-width: 100%;
    }

    /* ── Scrollbar ─────────────────────────────────────────────────────────────── */
    ::-webkit-scrollbar {
        width: 8px;
    }
    ::-webkit-scrollbar-track {
        background: #020617;
    }
    ::-webkit-scrollbar-thumb {
        background: #1e293b;
        border-radius: 4px;
    }
    ::-webkit-scrollbar-thumb:hover {
        background: #0f766e;
    }

    /* ── Animations ────────────────────────────────────────────────────────────── */
    @keyframes slideUp {
        from {
            opacity: 0;
            transform: translateY(40px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    @keyframes scrollLine {
        0%, 100% {
            opacity: 0;
            transform: scaleY(0);
            transform-origin: top;
        }
        50% {
            opacity: 1;
            transform: scaleY(1);
            transform-origin: top;
        }
        51% {
            transform-origin: bottom;
        }
        100% {
            opacity: 0;
            transform: scaleY(0);
            transform-origin: bottom;
        }
    }

    @keyframes fadeIn {
        from { opacity: 0; }
        to { opacity: 1; }
    }

    .animate-slide-up {
        animation: slideUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
        opacity: 0;
    }

    .animate-slide-up:nth-child(2) { animation-delay: 0.15s; }
    .animate-slide-up:nth-child(3) { animation-delay: 0.3s; }
    .animate-slide-up:nth-child(4) { animation-delay: 0.45s; }

    .animate-scroll-line {
        animation: scrollLine 2s ease-in-out infinite;
    }

    /* ── Reveal on Scroll ──────────────────────────────────────────────────────── */
    .reveal-up,
    .reveal-left,
    .reveal-right {
        opacity: 0;
        transform: translateY(30px);
        transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
                    transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    }

    .reveal-left {
        transform: translateX(-40px);
    }

    .reveal-right {
        transform: translateX(40px);
    }

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

    /* Stagger children */
    .reveal-up .delay-100 { transition-delay: 0.1s; }
    .reveal-up .delay-200 { transition-delay: 0.2s; }
    .reveal-up .delay-300 { transition-delay: 0.3s; }
    .reveal-up .delay-400 { transition-delay: 0.4s; }
    .reveal-up .delay-500 { transition-delay: 0.5s; }

    /* ── Navbar ────────────────────────────────────────────────────────────────── */
    #navbar {
        transition: background-color 0.4s ease, backdrop-filter 0.4s ease, box-shadow 0.4s ease;
    }

    #navbar.scrolled {
        background: rgba(2, 6, 23, 0.85);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        box-shadow: 0 1px 0 rgba(148, 163, 184, 0.05);
    }

    /* ── Mobile Menu ───────────────────────────────────────────────────────────── */
    #mobile-menu.open {
        transform: translateX(0);
    }

    .mobile-link {
        opacity: 0;
        transform: translateY(20px);
        transition: opacity 0.4s ease, transform 0.4s 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: 0.1s; }
    #mobile-menu.open .mobile-link:nth-child(2) { transition-delay: 0.15s; }
    #mobile-menu.open .mobile-link:nth-child(3) { transition-delay: 0.2s; }
    #mobile-menu.open .mobile-link:nth-child(4) { transition-delay: 0.25s; }
    #mobile-menu.open .mobile-link:nth-child(5) { transition-delay: 0.3s; }
    #mobile-menu.open .mobile-link:nth-child(6) { transition-delay: 0.35s; }

    /* ── Hamburger Animation ───────────────────────────────────────────────────── */
    #menu-btn.active #line1 {
        transform: rotate(45deg) translate(5px, 5px);
    }
    #menu-btn.active #line2 {
        opacity: 0;
    }
    #menu-btn.active #line3 {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    /* ── Feature Cards Hover ───────────────────────────────────────────────────── */
    .group:hover .group-hover\:bg-teal-800\/50 {
        background-color: rgba(15, 118, 110, 0.5);
    }

    /* ── Input Focus ───────────────────────────────────────────────────────────── */
    input:focus,
    textarea:focus {
        outline: none;
    }

    /* ── Smooth Image Loading ──────────────────────────────────────────────────── */
    img {
        transition: opacity 0.3s ease;
    }
    img[loading="lazy"] {
        opacity: 0;
    }
    img.loaded {
        opacity: 1;
    }

    /* ── Print Styles ──────────────────────────────────────────────────────────── */
    @media print {
        header, footer, #contact-form, #form-success {
            display: none;
        }
        body {
            background: white;
            color: black;
        }
    }

    /* ── Reduced Motion ────────────────────────────────────────────────────────── */
    @media (prefers-reduced-motion: reduce) {
        *, *::before, *::after {
            animation-duration: 0.01ms !important;
            animation-iteration-count: 1 !important;
            transition-duration: 0.01ms !important;
        }
        html {
            scroll-behavior: auto;
        }
        .reveal-up,
        .reveal-left,
        .reveal-right {
            opacity: 1;
            transform: none;
        }
    }