.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(238, 246, 248, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  transition: transform 0.35s ease, opacity 0.35s ease;
  transform: translateY(0);
  opacity: 1;
}

.site-header__inner {
  max-width: none;
  width: 100%;
  margin: 0 auto;
  padding: 0 1.5rem;
  min-height: 88px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.menu-toggle {
  display: none;
  border: 0;
  background: transparent;
  padding: 0.35rem;
  margin: 0;
  cursor: pointer;
  transition: transform 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  margin: 4px 0;
  background: var(--text);
  transition: transform 0.2s ease, opacity 0.2s ease, width 0.2s ease;
}

.menu-toggle:hover {
  transform: translateY(-50%) translateY(-2px);
  background: rgba(47, 111, 137, 0.12);
  box-shadow: 0 6px 14px rgba(47, 111, 137, 0.2);
}

.menu-toggle:hover span {
  width: 24px;
}

.menu-toggle:hover span:nth-child(2) {
  width: 18px;
}

.site-header.is-hidden {
  transform: translateY(-110%);
  opacity: 0;
}

.site-header.is-menu-open {
  transform: translateY(0);
  opacity: 1;
}

.page-layout {
  max-width: none;
  width: 100%;
  margin: 0;
  padding: 0 1.5rem 0;
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 2.5rem;
}

.site-sidebar {
  padding-top: 1.5rem;
  opacity: 0;
  transform: translateY(-10px);
  pointer-events: none;
  transition: opacity 0.35s ease, transform 0.35s ease;
}

body.header-is-hidden .site-sidebar {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.site-sidebar__inner {
  position: sticky;
  top: 2rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
}

.site-footer {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 18;
  width: 100%;
  padding: 1.1rem 0 1.2rem;
  font-size: 0.75rem;
  color: #ffffff;
  letter-spacing: 0.04em;
  background: #0f1114;
  text-align: center;
  border-radius: 0;
  opacity: 0;
  transform: translateY(110%);
  pointer-events: none;
  transition: transform 0.35s ease, opacity 0.35s ease;
}

body.footer-is-visible .site-footer {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.site-footer p {
  margin: 0;
}

.site-footer__meta {
  margin-top: 0.35rem;
  font-size: 0.7rem;
  line-height: 1.35;
  color: rgba(255, 255, 255, 0.82);
}

.footer-nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.85rem 1.2rem;
  margin: 0 0 0.45rem;
  font-size: 0.74rem;
}

.footer-nav a {
  color: rgba(255, 255, 255, 0.9);
}

.footer-nav a:hover {
  color: #ffffff;
}

main {
  max-width: none;
  width: 100%;
  padding: 0 0 6rem;
  position: relative;
}

@media (max-width: 900px) {
  .site-header__inner {
    min-height: auto;
    padding: 0.65rem 1rem 0.7rem;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    gap: 0.45rem;
    position: relative;
  }

  .menu-toggle {
    display: inline-block;
    position: absolute;
    left: 0.8rem;
    right: auto;
    top: 50%;
    transform: translateY(-50%);
    z-index: 40;
    background: rgba(248, 253, 255, 0.92);
    border-radius: 8px;
    backdrop-filter: blur(4px);
  }

  .site-header.is-menu-open .menu-toggle span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }

  .site-header.is-menu-open .menu-toggle span:nth-child(2) {
    opacity: 0;
  }

  .site-header.is-menu-open .menu-toggle span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }

  .page-layout {
    display: block;
    padding: 0 1rem;
  }

  .site-sidebar {
    display: none;
  }

  .site-sidebar__inner {
    position: static;
  }

  main {
    max-width: 100%;
    padding-bottom: 5rem;
    display: flow-root;
  }

  .footer-nav {
    gap: 0.55rem 0.85rem;
    font-size: 0.7rem;
  }
}