.page {
  display: flex;
  flex-direction: column;
  min-height: 100svh;
  max-width: var(--page-width);
  margin: 0 auto;
  padding: 0 var(--page-gutter) var(--space-8);
}

.header {
  flex-shrink: 0;
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: 58px;
  padding: 7px 0;
  border-bottom: 1px solid var(--hairline);
  background: var(--paper);
}

.site,
.site:visited {
  color: var(--navy);
  font-family: var(--font-mono);
  font-size: var(--font-body);
  font-weight: 700;
  letter-spacing: -0.035em;
  text-decoration: none;
}

.site:hover {
  text-decoration: underline;
}

.nav {
  --nav-indicator-width: 12px;
  --nav-indicator-offset: 8px;
  --nav-gap: var(--space-5);
  display: flex;
  align-items: center;
  gap: var(--nav-gap);
}

.nav a,
.nav a:visited {
  position: relative;
  color: var(--muted);
  font-size: var(--font-small);
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  text-decoration: none;
}

.nav a:hover {
  color: var(--link);
  text-decoration: none;
}

.nav a + a::before {
  content: "·";
  position: absolute;
  left: calc(var(--nav-gap) / -2);
  top: 50%;
  transform: translate(-50%, -50%);
  color: var(--muted);
  font-size: var(--font-small);
  font-weight: 400;
  line-height: 1;
}

.nav a[aria-current='page'] {
  font-weight: 700;
  color: var(--link);
}

.nav a[aria-current='page']::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: var(--nav-indicator-offset);
  width: var(--nav-indicator-width);
  height: 1px;
  background: var(--accent);
}

.main {
  flex: 1;
  margin-top: var(--space-7);
  overflow-wrap: anywhere;
  word-break: keep-all;
}

.footer {
  flex-shrink: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-4);
  margin-top: var(--space-8);
  padding-top: var(--space-4);
  border-top: 1px solid var(--hairline);
  color: var(--muted);
  font-size: var(--font-small);
}

.footer a,
.footer a:visited {
  color: var(--muted);
}

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

@media (max-width: 420px) {
  .nav {
    --nav-gap: var(--space-3);
  }
}

.skip { position: absolute; top: -80px; }
.skip:focus { top: var(--space-2); z-index: 20; background: var(--paper); padding: var(--space-2); }
@media (max-width: 420px) {
  .page { --page-gutter: var(--space-4); }
  .header { gap: var(--space-2); flex-wrap: wrap; }
  .main { margin-top: var(--space-6); }
}

/* The active route reads as a small indicator on an instrument panel. */
.header::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 36px;
  height: 1px;
  background: var(--accent);
}