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

/* --- Site Header --- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--white);
  border-bottom: 1px solid var(--border-light);
  transition: box-shadow var(--transition-base);
}

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

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: var(--space-md) var(--space-lg);
}

/* --- Logo --- */

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo__img {
  height: 36px;
  width: auto;
}

/* --- Main Navigation --- */

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

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

.main-nav__item {
  position: relative;
}

.main-nav__link {
  display: block;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.main-nav__link:hover {
  color: var(--text-primary);
  background: var(--mist);
}

/* Dropdown trigger */
.main-nav__link--has-children {
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
}

.main-nav__link--has-children::after {
  content: "";
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 4px solid currentColor;
  transition: transform var(--transition-fast);
}

/* Dropdown menus */
.main-nav__dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  padding: var(--space-sm) 0;
  background: var(--white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
}

.main-nav__item:hover .main-nav__dropdown,
.main-nav__item:focus-within .main-nav__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.main-nav__dropdown a {
  display: block;
  padding: var(--space-sm) var(--space-lg);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.main-nav__dropdown a:hover {
  color: var(--curtain);
  background: var(--cream);
}

/* Header CTA */
.header-cta {
  margin-left: var(--space-md);
}

/* --- Mobile Nav Toggle --- */

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  color: var(--text-primary);
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: currentColor;
  margin: 5px 0;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Site Footer --- */

.site-footer {
  background: var(--midnight);
  color: var(--text-on-dark);
  padding: var(--space-4xl) 0 var(--space-xl);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
}

.footer__brand p {
  margin-top: var(--space-md);
  color: var(--slate);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  max-width: 300px;
}

.footer__heading {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--slate);
  margin-bottom: var(--space-lg);
}

.footer__links li + li {
  margin-top: var(--space-sm);
}

.footer__links a {
  font-size: var(--text-sm);
  color: var(--text-on-dark);
  transition: color var(--transition-fast);
}

.footer__links a:hover {
  color: var(--spotlight);
}

.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: var(--space-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-xs);
  color: var(--slate);
}

.footer__social {
  display: flex;
  gap: var(--space-md);
}

.footer__social a {
  color: var(--slate);
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
}

.footer__social a:hover {
  color: var(--spotlight);
}

/* --- Responsive Layout --- */

@media (max-width: 1024px) {
  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
  }
}

@media (max-width: 768px) {
  /* Mobile nav */
  .nav-toggle {
    display: block;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--white);
    border-top: 1px solid var(--border-light);
    box-shadow: var(--shadow-lg);
    padding: var(--space-md);
    flex-direction: column;
    align-items: stretch;
  }

  .main-nav.open {
    display: flex;
  }

  .main-nav__list {
    flex-direction: column;
    align-items: stretch;
  }

  .main-nav__dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    padding-left: var(--space-lg);
    display: none;
  }

  .main-nav__item.open .main-nav__dropdown {
    display: block;
  }

  .main-nav__link--has-children::after {
    margin-left: auto;
  }

  .header-cta {
    margin-left: 0;
    margin-top: var(--space-md);
  }

  .header-cta .btn {
    width: 100%;
    text-align: center;
  }

  /* Footer mobile */
  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

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