.site-navbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 24px 28px;
  background: var(--paper);
}

.site-navbar::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 100vw;
  border-bottom: 1px solid var(--line);
  transform: translateX(-50%);
  pointer-events: none;
}

.site-navbar .brand {
  color: var(--ink);
  font: 600 1.15rem/1 "DM Mono", monospace;
  letter-spacing: -.06em;
  text-decoration: none;
  white-space: nowrap;
}

.site-navbar .nav-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 18px;
  font-size: .82rem;
  font-weight: 700;
  white-space: nowrap;
}

.site-navbar .nav-links a {
  text-decoration: none;
}

.site-navbar .nav-links > a:not(.urgent-link):hover,
.site-navbar .nav-links > a[aria-current="page"]:not(.urgent-link) {
  color: var(--blue);
}

.site-navbar .theme-toggle,
.site-navbar .urgent-link {
  flex-shrink: 0;
  width: auto;
  min-height: 28px;
  padding: 5px 8px;
  border: 1px solid var(--line);
  background: transparent;
  font: 500 .68rem/1.25 "DM Mono", monospace;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.site-navbar .theme-toggle {
  color: var(--muted);
  cursor: pointer;
}

.site-navbar .theme-toggle:hover {
  border-color: var(--blue);
  background: transparent;
  color: var(--ink);
}

.site-navbar .urgent-link {
  display: inline-flex;
  align-items: center;
  border-color: var(--red);
  color: var(--red);
}

.site-navbar .urgent-link:hover,
.site-navbar .urgent-link:focus-visible {
  border-color: var(--red);
  background: var(--red);
  color: var(--paper);
}

.site-navbar .theme-toggle:focus-visible,
.site-navbar .urgent-link:focus-visible,
.site-navbar .brand:focus-visible,
.site-navbar .nav-links > a:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 3px;
}

@media (max-width: 760px) {
  .site-navbar {
    align-items: flex-start;
    padding: 18px 20px;
  }

  .site-navbar .nav-links {
    flex-wrap: wrap;
    gap: 10px;
    font-size: .72rem;
  }
}