.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  display: flex;
  flex-direction: column;
  height: auto;
  min-height: var(--header-h);
  overflow: visible;
  transition: background var(--duration) var(--ease), border-color var(--duration) var(--ease),
    backdrop-filter var(--duration) var(--ease);
}

.site-header.overlay {
  position: sticky;
  left: 0;
  right: 0;
  background: rgba(10, 12, 14, 0.96);
  border-bottom: 1px solid var(--line);
}

.site-header.solid,
.site-header.overlay.scrolled,
.site-header.menu-open {
  background: rgba(10, 12, 14, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.header-inner {
  flex: 0 0 var(--header-h);
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
  flex: none;
}

.brand-mark {
  width: 2rem;
  height: 2rem;
  flex: none;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.brand-text strong {
  font-family: var(--font-display);
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--white);
  font-weight: 600;
}

.brand-text span {
  margin-top: 0.2rem;
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
}

@media (max-width: 720px) {
  .site-header .brand-text {
    display: none;
  }
}

.desktop-nav {
  display: none;
  align-items: center;
  justify-content: flex-end;
  flex: 1;
  gap: 0.85rem;
  min-width: 0;
  height: 100%;
}

.desktop-nav a {
  color: var(--mist);
  font-family: var(--font-display);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.76rem;
  font-weight: 600;
  position: relative;
  padding: 0.2rem 0;
}

.desktop-nav a::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.35rem;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration) var(--ease);
}

.desktop-nav a:hover,
.desktop-nav a.active {
  color: var(--white);
}

.desktop-nav a:hover::after,
.desktop-nav a.active::after {
  transform: scaleX(1);
}

.header-cta {
  display: none;
  flex: none;
}

.header-cta .btn {
  min-height: 2.55rem;
  padding: 0 1rem;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
}

.menu-toggle {
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--white);
  display: grid;
  place-items: center;
  cursor: pointer;
  position: relative;
  z-index: 81;
}

.menu-toggle span,
.menu-toggle span::before,
.menu-toggle span::after {
  display: block;
  width: 1.1rem;
  height: 1px;
  background: currentColor;
  position: relative;
  transition: transform var(--duration) var(--ease), opacity var(--duration) var(--ease);
}

.menu-toggle span::before,
.menu-toggle span::after {
  content: '';
  position: absolute;
  left: 0;
}

.menu-toggle span::before {
  top: -6px;
}

.menu-toggle span::after {
  top: 6px;
}

.menu-layer {
  position: fixed;
  inset: 0;
  z-index: 70;
}

.menu-backdrop {
  position: absolute;
  inset: 0;
  border: 0;
  padding: 0;
  cursor: pointer;
  background: rgba(10, 12, 14, 0.52);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.mobile-nav {
  position: relative;
  z-index: 1;
  margin: calc(var(--header-h) + 0.7rem) var(--gutter) 1.5rem;
  max-height: calc(100dvh - var(--header-h) - 1.4rem);
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  padding: 1.25rem 1.2rem 1.4rem;
  background: #161b22;
  color: var(--white);
  border: 1px solid rgba(246, 241, 232, 0.14);
  border-radius: var(--radius-lg);
  box-shadow: 0 28px 60px rgba(0, 0, 0, 0.45);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  isolation: isolate;
}

.mobile-nav-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.menu-close {
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--white);
  min-height: 2.5rem;
  padding: 0 0.9rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 0.78rem;
  cursor: pointer;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.mobile-nav a {
  color: var(--white);
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 5.6vw, 1.8rem);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  min-height: 3.15rem;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--line);
}

.mobile-nav a.active {
  color: var(--accent);
}

@media (min-width: 960px) {
  .desktop-nav,
  .header-cta {
    display: flex;
  }

  .menu-toggle {
    display: none;
  }
}

.site-footer {
  background: var(--ink);
  color: var(--mist);
  padding: var(--space-8) 0 1.5rem;
}

.footer-grid {
  display: grid;
  gap: 2.5rem;
}

@media (min-width: 800px) {
  .footer-grid {
    grid-template-columns: 1.4fr 1fr 1fr 1fr;
  }
}

.footer-brand p {
  margin-top: 1rem;
  max-width: 22rem;
}

.footer-brand .brand-text strong {
  font-size: 1.2rem;
}

.footer-col h2 {
  font-family: var(--font-display);
  color: var(--white);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 0.85rem;
  margin-bottom: 1rem;
  font-weight: 600;
}

.footer-col a,
.footer-col p {
  display: block;
  margin-bottom: 0.55rem;
  color: var(--mist);
}

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

.footer-meta {
  margin-top: 3.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.footer-legal {
  display: flex;
  gap: 1.5rem;
}

.page-shell {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

.page-shell main {
  flex: 1;
}

.page-shell.home main {
  padding-top: 0;
}