html {
    scroll-behavior: smooth;
}

.brand-gradient {
    background-color: #0f4c46;
}

.brand-gradient-text {
    background-image: linear-gradient(135deg, #0f766e 0%, #14b8a6 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* Sticky header: scroll'da hafifçe küçülüp gölge kazanır */
#siteHeader {
    transition: box-shadow .25s ease;
}

#siteHeader.is-scrolled #headerMain {
    height: 4.5rem;
}

#siteHeader.is-scrolled {
    box-shadow: 0 6px 20px -12px rgba(15, 76, 70, 0.2);
}

#headerMain {
    transition: height .25s ease;
}

/* Scroll progress bar */
#scrollProgress {
    width: 0%;
    transition: width .1s linear;
}

/* Scroll-reveal: sade, tek seferlik giriş animasyonu */
[data-reveal] {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity .5s ease, transform .5s ease;
}

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

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    [data-reveal],
    #headerMain,
    #siteHeader {
        transition: none !important;
    }

    [data-reveal] {
        opacity: 1 !important;
        transform: none !important;
    }
}