/* =============================================
   LAYOUT — Header, Footer, Container, Nav
   ============================================= */

/* --- Container --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* =============================================
   HEADER
   ============================================= */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-height);
  background-color: var(--color-white);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.site-header.scrolled {
  border-bottom-color: var(--color-gray-light);
  box-shadow: 0 1px 12px rgba(0, 0, 0, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

/* --- Logo --- */
.site-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.site-logo img {
  height: 36px;
  width: auto;
}

/* --- Primary Nav --- */
.primary-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
  margin: 0;
  padding: 0;
}

.primary-nav a {
  font-size: calc(var(--fs-sm) * 1.2); /* 20% larger than default nav size */
  font-weight: 500;
  color: var(--color-dark);
  letter-spacing: 0.01em;
  transition: color var(--transition-fast);
  position: relative;
}

.primary-nav a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -3px;
  width: 0;
  height: 1.5px;
  background-color: var(--color-orange);
  transition: width var(--transition-base);
}

.primary-nav a:hover {
  color: var(--color-orange);
}

.primary-nav a:hover::after {
  width: 100%;
}

.primary-nav a.active,
.primary-nav li.current-menu-item > a,
.primary-nav li.current-page-ancestor > a {
  color: var(--color-orange);
}

.primary-nav li.current-menu-item > a::after,
.primary-nav li.current-page-ancestor > a::after {
  width: 100%;
}

/* --- Header Actions --- */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

/* --- Mobile Menu Toggle --- */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 1.5px;
  background-color: var(--color-dark);
  transition: transform var(--transition-base), opacity var(--transition-base);
  transform-origin: center;
}

.menu-toggle.open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.menu-toggle.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.menu-toggle.open span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* --- Mobile Nav Drawer --- */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-white);
  z-index: 99;
  padding: var(--space-8) var(--space-6);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.mobile-nav.open {
  opacity: 1;
  pointer-events: all;
}

.mobile-nav__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  list-style: none;
  margin: 0;
  padding: 0;
}

.mobile-nav a {
  display: block;
  font-size: var(--fs-2xl);
  font-weight: 700;
  color: var(--color-dark);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-gray-light);
  letter-spacing: -0.02em;
  transition: color var(--transition-fast);
}

.mobile-nav li:last-child a {
  border-bottom: none;
}

.mobile-nav a:hover {
  color: var(--color-orange);
}

.mobile-nav .btn {
  margin-top: var(--space-6);
  width: 100%;
  justify-content: center;
  font-size: var(--fs-base);
}

/* =============================================
   FOOTER
   ============================================= */
.site-footer {
  background-color: var(--color-dark);
  color: var(--color-white);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-12);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand img {
  height: 32px;
  width: auto;
  margin-bottom: var(--space-5);
}

.footer-brand p {
  font-size: var(--fs-sm);
  color: rgba(255, 255, 255, 0.5);
  line-height: 1.7;
  max-width: 280px;
}

.footer-col h4 {
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.4);
  margin-bottom: var(--space-5);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-col a {
  font-size: var(--fs-sm);
  color: rgba(255, 255, 255, 0.65);
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: var(--color-white);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-8);
}

.footer-bottom p {
  font-size: var(--fs-sm);
  color: rgba(255, 255, 255, 0.35);
}

.footer-bottom a {
  font-size: var(--fs-sm);
  color: rgba(255, 255, 255, 0.35);
  transition: color var(--transition-fast);
}

.footer-bottom a:hover {
  color: rgba(255, 255, 255, 0.7);
}

/* =============================================
   RESPONSIVE LAYOUT
   ============================================= */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-10);
  }
}

@media (max-width: 768px) {
  :root {
    --section-py: 4rem;
    --header-height: 64px;
  }

  .primary-nav,
  .header-actions .btn {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .mobile-nav {
    display: block;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-3);
    text-align: center;
  }
}