/* ===== BASE & RESET ===== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; scroll-padding-top: 80px; }
    body { overflow-x: hidden; }
    img { max-width: 100%; height: auto; display: block; }
    a { text-decoration: none; color: inherit; }
    button { cursor: pointer; border: none; background: none; font-family: inherit; }
    ul, ol { list-style: none; }

    /* ===== SCROLL REVEAL (progressive enhancement) ===== */
    @media (prefers-reduced-motion: no-preference) {
        .scroll-reveal {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .scroll-reveal.revealed {
            opacity: 1;
            transform: translateY(0);
        }
    }
    @media (prefers-reduced-motion: reduce) {
        .scroll-reveal { opacity: 1; transform: none; transition: none; }
    }

    /* ===== NAVBAR SCROLL STATE ===== */
    #navbar.scrolled {
        box-shadow: 0 1px 20px rgba(0, 0, 0, 0.08);
    }

    /* ===== MOBILE MENU ===== */
    #mobile-menu {
        animation: slideDown 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }
    @keyframes slideDown {
        from { opacity: 0; transform: translateY(-8px); }
        to { opacity: 1; transform: translateY(0); }
    }

    /* ===== CUSTOM SELECTION ===== */
    ::selection {
        background: rgba(13, 148, 136, 0.2);
        color: #0f766e;
    }

    /* ===== FORM STYLES ===== */
    input:focus, textarea:focus {
        outline: none;
        border-color: #0d9488;
        box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.15);
    }

    /* ===== SMOOTH IMAGE LOADING ===== */
    img {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }

    /* ===== SUBTLE PATTERN FOR SECTIONS ===== */
    .bg-grid-pattern {
        background-image: radial-gradient(circle, rgba(13, 148, 136, 0.05) 1px, transparent 1px);
        background-size: 24px 24px;
    }

    /* ===== ACCESSIBILITY ===== */
    :focus-visible {
        outline: 2px solid #0d9488;
        outline-offset: 2px;
        border-radius: 4px;
    }

    /* ===== PRINT ===== */
    @media print {
        nav, #mobile-menu-btn, .scroll-reveal { display: none; }
        body { color: #000; background: #fff; }
        .bg-gradient-to-br { background: #0d9488 !important; }
    }