/* Shared top nav — Stripe Docs–inspired; skin-agnostic */
/*
 * Layout tokens are px-only. Skins change body font-size; if we used rem here,
 * the nav would shift when cycling skins.
 */
:root {
  --na-content-max: 720px;
  --na-pad-x: 20px;
  --na-purple: #635bff;
  --na-ink: #0a2540;
  --na-muted: #6b7c93;
  --na-rule: #e3e8ee;
  --na-bg: #f6f9fc;
  --na-white: #ffffff;
}

/* Stable root — skins must not change html font-size */
html {
  font-size: 16px;
  scrollbar-gutter: stable;
}

/* Full-bleed white bar (never shrink to content width) */
.site-nav {
  display: block;
  width: 100%;
  box-sizing: border-box;
  background: var(--na-white);
  border-bottom: 1px solid var(--na-rule);
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, sans-serif;
  font-size: 14px;
  line-height: 1.4;
  color: var(--na-ink);
  /* Isolate from skin body type */
  font-style: normal;
  letter-spacing: normal;
  text-transform: none;
}

/* Shared content column — same width as skin chrome / #app */
.site-nav-inner,
.na-col {
  display: block;
  width: 100%;
  max-width: var(--na-content-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--na-pad-x);
  padding-right: var(--na-pad-x);
  box-sizing: border-box;
}

.site-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 14px;
  padding-bottom: 14px;
}

.site-nav-brand {
  color: var(--na-ink);
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.site-nav-brand:hover {
  color: var(--na-purple);
}

.site-nav-skins {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 4px 16px;
}

.site-nav-skin {
  color: var(--na-muted);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  padding: 2px 0;
  border-bottom: 2px solid transparent;
}

.site-nav-skin:hover {
  color: var(--na-ink);
}

.site-nav-skin.is-active,
.site-nav-skin[aria-current="page"] {
  color: var(--na-purple);
  border-bottom-color: var(--na-purple);
  /* Keep weight constant — bolding the active link shifts the row when cycling skins */
  font-weight: 500;
}

#chrome {
  width: 100%;
  box-sizing: border-box;
}

@media (max-width: 560px) {
  .site-nav-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
  .site-nav-skins {
    justify-content: flex-start;
    gap: 4px 14px;
  }
}