.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background: #FFFFFF;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: flex-start;
  padding-left: 32px;
  z-index: 100;
}

.site-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  height: var(--footer-height);
  background: #FFFFFF;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-ui);
  font-size: 0.8rem;
  color: var(--color-text);
  z-index: 100;
}

.menu {
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: var(--menu-width);
  height: calc(100% - var(--header-height) - var(--footer-height));
  background: #FFFFFF;
  border-right: 1px solid var(--color-border);
  overflow-y: auto;
  padding: 24px 16px;
  transition: transform 0.3s ease;
  z-index: 90;
}

body.menu-collapsed .menu {
  transform: translateX(-100%);
}

.menu-tabs {
  position: fixed;
  top: calc(var(--header-height) + 24px);
  left: var(--menu-width);
  display: flex;
  flex-direction: column;
  transition: left 0.3s ease;
  z-index: 95;
}

body.menu-collapsed .menu-tabs {
  left: 0;
}

main.content {
  margin-top: var(--header-height);
  margin-bottom: var(--footer-height);
  margin-left: calc(var(--menu-width) + var(--menu-toggle-width));
  height: calc(100vh - var(--header-height) - var(--footer-height));
  overflow-y: auto;
  padding: 32px;
  transition: margin-left 0.3s ease;
}

body.menu-collapsed main.content {
  margin-left: var(--menu-toggle-width);
}

main.content h2 {
  font-size: 1.5rem;
  margin-bottom: 20px;
}

main.content p {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  max-width: 680px;
  margin: 0 0 20px;
}

main.content ul {
  max-width: 680px;
  padding-left: 1.3em;
  margin: 0 0 20px;
}

main.content li {
  font-family: var(--font-body);
  line-height: 1.6;
  margin-bottom: 10px;
}

main.content li::marker {
  color: var(--color-accent);
}