/* ==========================================
   LAYOUT — Header, Footer, Navigation
   ========================================== */

/* Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border-light);
    transition: box-shadow var(--transition-base);
}

.site-header--scrolled {
    box-shadow: var(--shadow-sm);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.site-header__logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.site-header__logo-text {
    font-family: var(--font-primary);
    font-size: var(--fs-xl);
    font-weight: 900;
    color: var(--color-text);
    letter-spacing: -0.04em;
    line-height: 1;
    text-transform: uppercase;
}

.logo-one {
    color: #E91E63;
}

.logo-pack,
.logo-lab {
    color: var(--color-text);
}

/* Footer inverted logo */
.site-footer .logo-one {
    color: #E91E63;
}

.site-footer .logo-pack,
.site-footer .logo-lab {
    color: var(--color-text-inverse);
}

/* Navigation */
.main-nav {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.main-nav__list {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.main-nav__link {
    font-size: var(--fs-sm);
    font-weight: var(--fw-medium);
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
    padding: var(--space-sm) 0;
}

.main-nav__link:hover,
.main-nav__link--active {
    color: var(--color-primary);
}

.main-nav__cta {
    margin-left: var(--space-md);
}

/* Burger menu */
.burger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 28px;
    height: 28px;
    padding: 0;
    background: none;
    border: none;
    cursor: pointer;
    z-index: calc(var(--z-overlay) + 1);
}

.burger__line {
    width: 100%;
    height: 2px;
    background-color: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition-base);
    transform-origin: center;
}

.burger--active .burger__line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.burger--active .burger__line:nth-child(2) {
    opacity: 0;
}

.burger--active .burger__line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Nav Overlay */
.mobile-nav {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-bg);
    z-index: var(--z-overlay);
    padding: 100px var(--container-padding) var(--space-xl);
    overflow-y: auto;
    visibility: hidden;
    opacity: 0;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.mobile-nav--open {
    visibility: visible;
    opacity: 1;
}

.mobile-nav__list {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.mobile-nav__link {
    font-size: var(--fs-xl);
    font-weight: var(--fw-semibold);
    color: var(--color-text);
    display: block;
    padding: var(--space-sm) 0;
}

.mobile-nav__link:hover {
    color: var(--color-primary);
}

.mobile-nav__cta {
    margin-top: var(--space-2xl);
}

@media (max-width: 768px) {
    .burger {
        display: flex;
    }

    .main-nav {
        display: none;
    }

    .mobile-nav {
        display: block;
    }

    .site-header__inner {
        height: 60px;
    }
}

/* Footer */
.site-footer {
    background-color: var(--color-bg-dark);
    color: var(--color-text-inverse);
    padding: var(--space-3xl) 0 0;
}

.site-footer a {
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-fast);
}

.site-footer a:hover {
    color: var(--color-text-inverse);
}

.footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-2xl);
    padding-bottom: var(--space-3xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__brand-desc {
    font-size: var(--fs-sm);
    color: rgba(255, 255, 255, 0.6);
    line-height: var(--lh-relaxed);
    margin-top: var(--space-md);
    max-width: 300px;
}

.footer__heading {
    font-size: var(--fs-sm);
    font-weight: var(--fw-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: var(--space-lg);
}

.footer__links {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer__link {
    font-size: var(--fs-sm);
}

.footer__contact-item {
    font-size: var(--fs-sm);
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--space-sm);
}

.footer__bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg) 0;
    font-size: var(--fs-xs);
    color: rgba(255, 255, 255, 0.4);
}

.footer__disclaimer {
    background-color: rgba(255, 255, 255, 0.05);
    padding: var(--space-lg) 0;
    margin-top: var(--space-lg);
}

.footer__disclaimer-text {
    font-size: var(--fs-xs);
    color: rgba(255, 255, 255, 0.4);
    text-align: center;
    line-height: var(--lh-relaxed);
    margin: 0;
}

@media (max-width: 768px) {
    .footer__grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }

    .footer__bottom {
        flex-direction: column;
        gap: var(--space-sm);
        text-align: center;
    }
}

/* Breadcrumbs */
.breadcrumbs {
    padding: var(--space-md) 0;
    font-size: var(--fs-sm);
    color: var(--color-text-light);
}

.breadcrumbs__list {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.breadcrumbs__sep {
    color: var(--color-text-light);
    margin: 0 var(--space-xs);
}

.breadcrumbs__link {
    color: var(--color-text-secondary);
}

.breadcrumbs__current {
    color: var(--color-text-light);
}