/* ========== BASE ========== */
    *, *::before, *::after {
        box-sizing: border-box;
    }

    html {
        scroll-behavior: smooth;
        -webkit-text-size-adjust: 100%;
    }

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

    img {
        max-width: 100%;
        height: auto;
    }

    ::selection {
        background: rgba(45, 212, 191, 0.3);
        color: #0f766e;
    }

    /* ========== NAVBAR ========== */
    .nav-logo-text {
        transition: color 0.5s ease;
    }

    #navbar.scrolled .nav-logo-text,
    #navbar.scrolled .nav-link {
        color: rgba(255, 255, 255, 0.9) !important;
    }

    /* ========== HERO ANIMATIONS ========== */
    .hero-badge {
        opacity: 0;
        animation: fadeInDown 0.8s ease forwards;
        animation-delay: 0.3s;
    }

    .hero-title {
        opacity: 0;
        animation: fadeInUp 0.9s ease forwards;
        animation-delay: 0.5s;
    }

    .hero-subtitle {
        opacity: 0;
        animation: fadeInUp 0.9s ease forwards;
        animation-delay: 0.7s;
    }

    .hero-cta {
        opacity: 0;
        animation: fadeInUp 0.9s ease forwards;
        animation-delay: 0.9s;
    }

    .hero-scroll {
        opacity: 0;
        animation: fadeInUp 0.9s ease forwards;
        animation-delay: 1.1s;
    }

    @keyframes fadeInDown {
        from {
            opacity: 0;
            transform: translateY(-20px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

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

    /* ========== SCROLL REVEAL ========== */
    .reveal {
        opacity: 1;
        transform: translateY(0);
        transition: opacity 0.7s ease, transform 0.7s ease;
    }

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

    @media (prefers-reduced-motion: no-preference) {
        .reveal {
            opacity: 0;
            transform: translateY(30px);
        }
        .reveal.revealed {
            opacity: 1;
            transform: translateY(0);
        }
    }

    /* ========== BACK TO TOP ========== */
    #backToTop.visible {
        opacity: 1;
        pointer-events: auto;
        transform: translateY(0);
    }

    /* ========== MOBILE MENU ========== */
    #mobileMenu {
        animation: slideDown 0.3s ease forwards;
    }

    #mobileMenu.hidden {
        animation: slideUp 0.3s ease forwards;
    }

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

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

    /* ========== FORM STYLES ========== */
    select {
        background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
        background-repeat: no-repeat;
        background-position: right 1rem center;
        padding-right: 2.5rem;
    }

    /* ========== FOCUS VISIBLE ========== */
    a:focus-visible,
    button:focus-visible,
    input:focus-visible,
    select:focus-visible,
    textarea:focus-visible {
        outline: 2px solid #2dd4bf;
        outline-offset: 2px;
        border-radius: 4px;
    }