.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  height: var(--header-h);
  background: rgba(11, 14, 19, 0.94);
  border-bottom: 1px solid transparent;
  transition: border-color var(--duration) var(--ease), box-shadow var(--duration) var(--ease), background var(--duration) var(--ease);
}

.site-header.is-scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-header);
  background: rgba(11, 14, 19, 0.98);
}

.header-inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--space-5);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-white);
  flex-shrink: 0;
}

.logo:hover {
  color: var(--color-white);
}

.logo img {
  height: 48px;
  width: auto;
  max-width: 160px;
  object-fit: contain;
}

.logo .logo-text {
  display: inline;
  font-family: var(--font-display);
  font-weight: var(--fw-bold);
  font-size: var(--fs-lg);
  letter-spacing: 0.02em;
  color: var(--color-white);
  white-space: nowrap;
}

.footer-brand .logo-text {
  display: block;
  font-family: var(--font-display);
  font-weight: var(--fw-bold);
  font-size: var(--fs-lg);
  letter-spacing: 0.02em;
  color: var(--color-white);
  margin-bottom: var(--space-3);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  z-index: calc(var(--z-overlay) + 1);
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text);
  position: relative;
  transition: background var(--duration) var(--ease);
}

.nav-toggle-bar::before,
.nav-toggle-bar::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  transition: transform var(--duration) var(--ease), top var(--duration) var(--ease);
}

.nav-toggle-bar::before {
  top: -6px;
}

.nav-toggle-bar::after {
  top: 6px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar::after {
  top: 0;
  transform: rotate(-45deg);
}

.site-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-list > li > a,
.nav-dropdown-toggle {
  display: block;
  padding: var(--space-2) var(--space-3);
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  letter-spacing: 0.02em;
  border-radius: var(--radius-sm);
  transition: color var(--duration) var(--ease), background var(--duration) var(--ease);
}

.nav-list > li > a:hover,
.nav-dropdown-toggle:hover,
.nav-list > li > a[aria-current="page"],
.nav-dropdown.is-active > .nav-dropdown-toggle {
  color: var(--color-white);
  background: var(--color-accent-soft);
}

.nav-dropdown {
  position: relative;
}

.nav-dropdown-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.nav-dropdown-toggle::after {
  content: "";
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
  opacity: 0.7;
}

.nav-dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 160px;
  padding: var(--space-2);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity var(--duration) var(--ease), transform var(--duration) var(--ease), visibility var(--duration) var(--ease);
  z-index: var(--z-overlay);
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown:focus-within .nav-dropdown-menu,
.nav-dropdown.is-open .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown-menu a {
  display: block;
  padding: var(--space-2) var(--space-3);
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
  border-radius: var(--radius-sm);
}

.nav-dropdown-menu a:hover,
.nav-dropdown-menu a[aria-current="page"] {
  color: var(--color-white);
  background: var(--color-accent-soft);
}

.nav-overlay {
  display: none;
}

.site-main {
  min-height: calc(100vh - var(--header-h) - 280px);
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.container--wide {
  max-width: var(--container-wide);
}

.section {
  padding: var(--space-8) 0;
}

.section--tight {
  padding: var(--space-7) 0;
}

.section--muted {
  background: var(--color-bg-elevated);
}

.section-header {
  margin-bottom: var(--space-6);
  max-width: 40rem;
}

.section-header p {
  margin-bottom: 0;
}

.site-footer {
  background: var(--color-bg-muted);
  border-top: 1px solid var(--color-border);
  padding: var(--space-7) 0 var(--space-5);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: var(--space-6);
  margin-bottom: var(--space-7);
}

.footer-brand p {
  font-size: var(--fs-sm);
  max-width: 28rem;
}

.footer-title {
  font-family: var(--font-display);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: var(--color-white);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

.footer-links a,
.footer-contact p,
.footer-contact a {
  display: block;
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
  margin-bottom: var(--space-2);
}

.footer-links a:hover,
.footer-contact a:hover {
  color: var(--color-accent-hover);
}

.brand-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-5);
  padding: var(--space-5) 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-5);
}

.brand-strip a,
.brand-strip span {
  opacity: 0.65;
  transition: opacity var(--duration) var(--ease);
}

.brand-strip a:hover {
  opacity: 1;
}

.brand-strip img {
  height: 28px;
  width: auto;
  filter: grayscale(1) brightness(1.4);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-3);
  font-size: var(--fs-xs);
  color: var(--color-text-dim);
}

@media (max-width: 960px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav-overlay {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--duration) var(--ease), visibility var(--duration) var(--ease);
    z-index: var(--z-overlay);
  }

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

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    width: min(320px, 88vw);
    height: 100vh;
    background: var(--color-bg-elevated);
    border-left: 1px solid var(--color-border);
    padding: calc(var(--header-h) + var(--space-5)) var(--space-5) var(--space-5);
    transform: translateX(100%);
    transition: transform var(--duration) var(--ease);
    z-index: calc(var(--z-overlay) + 1);
    align-items: flex-start;
    overflow-y: auto;
  }

  .site-nav.is-open {
    transform: translateX(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    gap: var(--space-1);
  }

  .nav-list > li > a,
  .nav-dropdown-toggle {
    padding: var(--space-3) var(--space-4);
    font-size: var(--fs-base);
  }

  .nav-dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    background: transparent;
    padding: 0 0 0 var(--space-4);
    display: none;
    min-width: 0;
  }

  .nav-dropdown.is-open .nav-dropdown-menu {
    display: block;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }
}

@media (max-width: 600px) {
  .header-inner,
  .container {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }

  .logo img {
    height: 40px;
  }

  .brand-strip {
    gap: var(--space-4);
  }

  .brand-strip img {
    height: 22px;
  }
}