/**
 * header.css
 * Header fisso in alto. Su mobile i link di navigazione
 * (non la CTA, che resta sempre visibile) collassano in un
 * menu a comparsa attivato dall'hamburger — nel mockup
 * desktop non è presente perché a quella larghezza c'è spazio,
 * ma serve per il requisito di resa mobile perfetta.
 */

.site-header {
    background: var(--color-dark);
    position: sticky;
    top: 0;
    z-index: 100;
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-block: var(--space-2);
    gap: var(--space-2);
}

.site-header__logo img {
    height: 50px;
    width: auto;
}

/* --- Nav desktop: nascosta su mobile --- */
.site-nav {
    display: none;
    align-items: center;
    gap: var(--space-4);
}

.site-nav__link {
    color: var(--color-white);
    font-size: 0.95rem;
    font-weight: 500;
    opacity: 0.9;
    transition: opacity var(--transition-fast);
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
    opacity: 1;
}

/* --- Hamburger: visibile solo su mobile --- */
.nav-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 32px;
    height: 32px;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    height: 2px;
    width: 100%;
    background: var(--color-white);
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* --- Menu mobile a comparsa --- */
.site-nav--mobile {
    display: none;
    flex-direction: column;
    gap: var(--space-1);
    background: var(--color-dark);
    padding: 0 var(--space-3) var(--space-3);
}

.site-nav--mobile.is-open {
    display: flex;
}

.site-nav--mobile .site-nav__link {
    padding: var(--space-1) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.site-nav--mobile .btn-cta {
    margin-top: var(--space-2);
    width: 100%;
}

/* CTA sempre visibile nell'header, anche su mobile */
.site-header__cta {
    flex-shrink: 0;
}

/* --- Desktop (>= 960px): nav orizzontale, niente hamburger --- */
@media (min-width: 960px) {
    .site-nav {
        display: flex;
    }

    .nav-toggle {
        display: none;
    }

    .site-nav--mobile {
        display: none !important;
    }
}