/* ============================================================================
 * site-nav.css — ONE unified top navigation for every readbiz page.
 *
 * Rendered by /js/site-nav.js into <header data-site-nav>. This stylesheet is
 * fully self-contained: it does NOT depend on any page's own CSS variables.
 * It declares its own --rb-* tokens (with the warm-paper brand palette) so the
 * bar looks identical whether the page also loads style.css, portfolio.css,
 * education-report.css, or nothing at all.
 *
 * Scope: the nav only. It never styles page bodies.
 * ==========================================================================*/

[data-site-nav] {
  /* Brand palette — single source of truth for the bar. */
  --rb-ink: #2c2420;
  --rb-ink-soft: #6b5d52;
  --rb-ink-mute: #9a8c80;
  --rb-paper: #fdfaf4;
  --rb-orange: #c2703e;
  --rb-orange-light: rgba(194, 112, 62, 0.1);
  --rb-rule: rgba(44, 36, 32, 0.1);
  --rb-rule-strong: rgba(44, 36, 32, 0.22);
  --rb-subtle: rgba(44, 36, 32, 0.04);

  display: block;
  position: relative;
  z-index: 50;
  background: var(--rb-paper);
  border-bottom: 1px solid var(--rb-rule);
  font-family: 'DM Sans', 'Inter', system-ui, -apple-system, 'Noto Sans SC', sans-serif;
}

.site-nav-row {
  max-width: 1200px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 20px;
}

/* ---- Brand (always left, always links to /) ---- */
.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
  color: var(--rb-ink);
  flex: 0 0 auto;
}
.site-brand-mark {
  width: 34px;
  height: 34px;
  flex: 0 0 34px;
  border-radius: 9px;
}
.site-brand-name {
  font-family: Georgia, 'Times New Roman', 'Songti SC', serif;
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1;
}

/* ---- Center search ---- */
.site-nav .nav-search {
  flex: 1 1 auto;
  min-width: 0;
  max-width: 420px;
  display: flex;
  align-items: center;
  gap: 8px;
  height: 40px;
  margin: 0;
  padding: 0 14px;
  background: var(--rb-subtle);
  border: 1px solid var(--rb-rule);
  border-radius: 999px;
  transition: border-color 140ms ease;
}
.site-nav .nav-search:focus-within { border-color: rgba(194, 112, 62, 0.5); }
.site-nav .nav-search svg { flex: 0 0 auto; color: var(--rb-ink-mute); }
.site-nav .nav-search input {
  flex: 1 1 auto;
  min-width: 0;
  height: 100%;
  border: 0;
  background: transparent;
  font: inherit;
  font-size: 14px;
  color: var(--rb-ink);
  outline: none;
}
.site-nav .nav-search input::placeholder { color: var(--rb-ink-mute); }

/* When there is no search box, push the right cluster to the far edge. */
.site-nav-spacer { flex: 1 1 auto; }

/* ---- Right cluster: product links, lang toggle, founding slot, auth ---- */
.site-nav-right {
  display: flex;
  align-items: center;
  gap: 18px;
  flex: 0 0 auto;
}
.site-nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
}
.site-nav-links a {
  text-decoration: none;
  color: var(--rb-ink-soft);
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  transition: color 140ms ease;
}
.site-nav-links a:hover { color: var(--rb-ink); }
.site-nav-links a.is-active { color: var(--rb-ink); }
.site-nav-links a.is-active::after {
  content: "";
  display: block;
  height: 2px;
  border-radius: 2px;
  background: var(--rb-orange);
  margin-top: 3px;
}

/* ---- Language toggle (id="lang-toggle" — shared by report.js + landing-lang-toggle.js) ---- */
.site-nav .site-lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0;
  border: 1px solid var(--rb-rule-strong);
  border-radius: 999px;
  overflow: hidden;
  font-family: ui-monospace, 'SF Mono', Menlo, monospace;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  flex: 0 0 auto;
}
.site-nav .site-lang-toggle button {
  background: transparent;
  border: 0;
  padding: 6px 12px;
  cursor: pointer;
  color: var(--rb-ink-mute);
  font: inherit;
  line-height: 1;
  transition: background 140ms ease, color 140ms ease;
}
.site-nav .site-lang-toggle button:hover { color: var(--rb-ink); background: var(--rb-subtle); }
/* Active states for both drivers: landing uses .lang-btn-active, report uses .active */
.site-nav .site-lang-toggle button.lang-btn-active,
.site-nav .site-lang-toggle button.active {
  background: var(--rb-ink);
  color: var(--rb-paper);
}
.site-nav .site-lang-toggle .lang-sep,
.site-nav .site-lang-toggle .lang-toggle-sep {
  width: 1px;
  height: 15px;
  background: var(--rb-rule-strong);
  flex: 0 0 1px;
  color: transparent;
  overflow: hidden;
  font-size: 0;
}

/* ---- Founding upgrade pill (revealed by founding-badge.js for non-payers) ---- */
.site-nav .founding-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 14px;
  border: 1px solid rgba(194, 112, 62, 0.28);
  border-radius: 999px;
  background: var(--rb-orange-light);
  color: var(--rb-orange);
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
  transition: background 140ms ease;
}
.site-nav .founding-pill:hover { background: rgba(194, 112, 62, 0.16); }

/* The slot ships `hidden` + inline display:inline-flex (FOUC contract). This
 * !important rule guarantees `hidden` wins over the inline display, matching
 * the load-bearing rule in style.css / education-report.css. */
.site-nav [data-founding-slot][hidden] { display: none !important; }

/* ---- Page-specific extra controls (e.g. portfolio login/logout) ---- */
.site-nav .site-nav-extra {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.site-nav .site-nav-extra .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid var(--rb-rule-strong);
  background: transparent;
  color: var(--rb-ink);
  cursor: pointer;
  white-space: nowrap;
  transition: background 140ms ease, border-color 140ms ease;
}
.site-nav .site-nav-extra .btn:hover { border-color: var(--rb-ink-soft); }
.site-nav .site-nav-extra .btn.btn-primary {
  background: var(--rb-ink);
  color: var(--rb-paper);
  border-color: var(--rb-ink);
}
.site-nav .site-nav-extra .btn.btn-primary:hover { background: #1f1916; }
.site-nav .site-nav-extra .btn.hidden { display: none; }

/* ---- Primary CTA (logged-out signup / sign-in) ---- */
.site-nav .nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}
.site-nav .nav-cta .btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 18px;
  border-radius: 999px;
  background: var(--rb-ink);
  color: var(--rb-paper);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  border: 0;
  white-space: nowrap;
  transition: background 140ms ease, transform 140ms ease;
}
.site-nav .nav-cta .btn-primary:hover { background: #1f1916; }

/* ---- Responsive ---- */
@media (max-width: 820px) {
  .site-nav-row { gap: 14px; padding: 12px 16px; }
  .site-nav .nav-search { display: none; }
  .site-nav-right { gap: 12px; }
  .site-nav-links { gap: 12px; }
  .site-nav-links a { font-size: 13px; }
  .site-nav-links a.is-active::after { display: none; }
}
@media (max-width: 560px) {
  .site-nav-links { display: none; }
  .site-brand-name { font-size: 19px; }
}