.shell {
  width: min(calc(100% - 2rem), var(--shell));
  margin-inline: auto;
}

.site-header {
  position: absolute;
  z-index: 20;
  inset: 0 0 auto;
  height: var(--header-height);
  border-bottom: 1px solid transparent;
}

.site-header[data-scrolled="true"] {
  position: fixed;
  border-color: var(--color-line);
  background: rgb(3 8 11 / 88%);
  backdrop-filter: blur(18px);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: clamp(1.25rem, 3vw, 2.75rem);
}

.future-anchor {
  height: 0;
  overflow: hidden;
}