.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.main-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 72px;
    flex-wrap: wrap;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--text);
    text-decoration: none;
}

.logo-accent {
    color: var(--primary);
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.nav-link {
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-weight: 500;
    color: var(--text);
    transition: all var(--transition);
    font-size: 0.9375rem;
}

.nav-link:hover,
.nav-link:focus-visible,
.nav-link[aria-current="page"] {
    background: var(--primary-light);
    color: var(--primary);
}

.nav-cta {
    margin-left: 12px;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 10px;
    border-radius: var(--radius-sm);
}

.menu-bar {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: all var(--transition);
}

.mobile-menu-btn[aria-expanded="true"] .menu-bar:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn[aria-expanded="true"] .menu-bar:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn[aria-expanded="true"] .menu-bar:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }
    .nav-list {
        display: none;
        flex-direction: column;
        width: 100%;
        padding: 16px 0;
        gap: 4px;
    }
    .nav-list.open {
        display: flex;
    }
    .nav-link, .nav-cta {
        width: 100%;
        text-align: center;
        justify-content: center;
    }
    .nav-cta {
        margin-left: 0;
    }
}