.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid color-mix(in oklch, var(--border) 84%, transparent);
  background: color-mix(in oklch, var(--bg) 86%, transparent);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}
.topbar-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: max-content;
}
.brand-logo {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  object-fit: cover;
  background: color-mix(in oklch, var(--accent) 10%, var(--surface));
}
.brand strong {
  display: block;
  font-size: 20px;
  line-height: 1;
  letter-spacing: -0.04em;
}
.brand span span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1;
}
.anchor-nav {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: none;
  padding-block: 10px;
}
.anchor-nav::-webkit-scrollbar { display: none; }
.anchor-nav a {
  min-width: max-content;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 8px 12px;
  color: var(--muted);
  font-size: 13px;
  transition: background 180ms cubic-bezier(0.23, 1, 0.32, 1), color 180ms cubic-bezier(0.23, 1, 0.32, 1), border-color 180ms cubic-bezier(0.23, 1, 0.32, 1);
}
.anchor-nav a:hover,
.anchor-nav a[aria-current="page"] {
  background: var(--surface);
  border-color: var(--border);
  color: var(--fg);
}
.nav-cta {
  min-width: max-content;
  border-radius: 999px;
  padding: 9px 14px;
  background: var(--accent);
  color: var(--surface);
  font-size: 13px;
  font-weight: 800;
}
.pagefoot {
  border-top: 1px solid var(--border);
  padding: 28px 0 40px;
  color: var(--muted);
  font-size: 14px;
}
.foot-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.meta {
  color: var(--muted);
  font: 500 13px/1.4 var(--font-mono);
}
.foot-link {
  color: var(--fg);
  font-weight: 800;
}
.foot-link:hover {
  color: var(--accent);
}
@media (max-width: 980px) {
  .topbar-inner {
    min-height: auto;
    padding-block: 12px;
    flex-wrap: wrap;
  }
  .anchor-nav {
    order: 3;
    width: 100%;
    padding-block: 2px 6px;
  }
  .nav-cta { margin-left: auto; }
}
@media (max-width: 640px) {
  .brand-logo {
    width: 38px;
    height: 38px;
  }
  .brand strong { font-size: 18px; }
  .nav-cta {
    padding: 8px 12px;
    font-size: 12px;
  }
}