.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

main {
  display: block;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: saturate(160%) blur(12px);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: background 200ms var(--ease), border-color 200ms var(--ease),
    box-shadow 200ms var(--ease);
}

.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.92);
  border-bottom-color: var(--line);
  box-shadow: var(--shadow-sm);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding-block: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--ink);
  font-weight: 800;
  letter-spacing: 0.04em;
  font-size: 1.15rem;
}

.brand:hover {
  color: var(--brand-deep);
}

.brand__mark {
  width: 28px;
  height: 28px;
}

.brand__name {
  font-family: var(--font-sans);
}

.primary-nav ul {
  display: flex;
  gap: 0.4rem;
  align-items: center;
}

.primary-nav a {
  display: inline-block;
  padding: 0.55rem 0.9rem;
  border-radius: var(--radius-pill);
  font-weight: 500;
  color: var(--ink-soft);
  transition: background 160ms var(--ease), color 160ms var(--ease);
}

.primary-nav a:hover {
  color: var(--ink);
  background: var(--bg-mist);
}

.primary-nav a[aria-current="page"] {
  color: var(--brand-deep);
  background: var(--bg-mist);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 0;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 200ms var(--ease), opacity 200ms var(--ease);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 720px) {
  .nav-toggle {
    display: inline-flex;
  }

  .primary-nav {
    position: absolute;
    inset: 100% 0 auto 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-md);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 180ms var(--ease), transform 180ms var(--ease);
  }

  .primary-nav.is-open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .primary-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
    padding: 1rem var(--gutter) 1.5rem;
  }

  .primary-nav a {
    padding: 0.85rem 1rem;
    border-radius: var(--radius-md);
    font-size: 1.05rem;
  }
}

.site-footer {
  margin-top: 6rem;
  background: var(--ink);
  color: rgba(255, 255, 255, 0.78);
}

.site-footer__inner {
  display: grid;
  gap: 1.25rem;
  align-items: center;
  grid-template-columns: 1fr auto 1fr;
  padding-block: 2rem;
}

.brand--footer {
  color: #fff;
}

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

.site-footer nav ul {
  display: flex;
  gap: 1.25rem;
  justify-content: center;
}

.site-footer a {
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.95rem;
}

.site-footer a:hover {
  color: #fff;
}

.site-footer__legal {
  margin: 0;
  font-size: 0.85rem;
  text-align: right;
  color: rgba(255, 255, 255, 0.55);
}

@media (max-width: 720px) {
  .site-footer__inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .site-footer__legal {
    text-align: center;
  }
}