/* ─── topbar-shared.css ────────────────────────────────────────────
 * Shared styles for public static-page topbars.
 * Loaded after per-page <style> so it overrides safely.
 * ─────────────────────────────────────────────────────────────── */

/* ── Smooth in-page scroll + anchor offset for sticky topbar ── */
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

/* ── Skip to content (a11y) ─────────────────────────────────── */
.skip-link {
  position: absolute; top: -40px; left: 12px; z-index: 1000;
  padding: 8px 14px; border-radius: 6px;
  background: var(--accent); color: var(--paper);
  font: 600 13px/1 'Inter Tight', sans-serif; text-decoration: none;
  box-shadow: 0 4px 14px -4px oklch(0 0 0 / 0.3);
  transition: top .2s ease;
}
.skip-link:focus { top: 8px; outline: none; }

/* ── Topbar base: sticky + blur + scroll-shrink + centered nav ── */
.topbar {
  position: sticky; top: 0; z-index: 50;
  display: flex;
  align-items: center;
  gap: 12px;
  backdrop-filter: blur(12px) saturate(140%);
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  background: color-mix(in oklch, var(--paper) 80%, transparent);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease, background .2s ease;
}
html[data-scrolled="true"] .topbar {
  border-bottom-color: var(--rule);
  background: color-mix(in oklch, var(--paper) 92%, transparent);
}
/* Center nav absolutely so position is independent of left/right widths */
.topbar > .top-nav,
.topbar > nav.nav {
  position: absolute;
  left: 50%;
  top: 0; bottom: 0;
  transform: translateX(-50%);
  margin: 0 !important;
  height: 100%;
}
/* Push right-side actions to far right + uniform child sizing */
.topbar > .top-r,
.topbar > .top-actions {
  margin-left: auto !important;
  display: flex;
  align-items: center;
  gap: 8px;
}
.topbar > .top-r > *,
.topbar > .top-actions > * { height: 34px; }
.topbar .theme-toggle,
.topbar .topbar-burger { width: 34px; height: 34px; flex-shrink: 0; }
.topbar .sign-in,
.topbar .get-started,
.topbar .open-studio {
  height: 34px;
  padding: 0 14px;
}

/* ── Top nav: underline tab style (matches .bdfy-tabs in app) ── */
.top-nav, nav.nav {
  display: inline-flex;
  align-items: stretch;
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0;
  flex-shrink: 0;
  height: 100%;
}
.top-nav a, nav.nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 0 16px;
  height: 100%;
  font: 500 13.5px/1 'Inter Tight', sans-serif;
  color: var(--ink-3);
  text-decoration: none;
  border-radius: 0;
  background: transparent;
  transition: color .2s ease;
}
.top-nav a::after, nav.nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 16px;
  right: 16px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px 2px 0 0;
  transform: scaleX(0);
  transform-origin: center;
  transition: transform .2s ease;
}
.top-nav a:hover, nav.nav a:hover { color: var(--ink); }
.top-nav a.active,
.top-nav a[aria-current="page"],
nav.nav a.active,
nav.nav a[aria-current="page"] { color: var(--ink); }
.top-nav a.active::after,
.top-nav a[aria-current="page"]::after,
nav.nav a.active::after,
nav.nav a[aria-current="page"]::after { transform: scaleX(1); }
.top-nav a:focus-visible, nav.nav a:focus-visible {
  outline: none;
  box-shadow: inset 0 0 0 2px var(--accent);
}

/* ── Focus ring (a11y) ──────────────────────────────────────── */
.topbar a:focus-visible,
.topbar button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 6px;
}

/* ── CTA buttons (Sign in / Get started / Open Studio) ─────── */
.sign-in {
  display: inline-flex; align-items: center; gap: 6px;
  height: 34px; padding: 0 14px;
  border-radius: 7px; border: 1px solid var(--rule);
  background: transparent; color: var(--ink-2);
  font: 500 12.5px/1 'Inter Tight', sans-serif; text-decoration: none;
  transition: background .15s, border-color .15s, color .15s, transform .15s;
}
.sign-in:hover {
  background: var(--paper-2); border-color: var(--rule-2);
  color: var(--ink); transform: translateY(-1px);
}

.get-started {
  display: inline-flex; align-items: center; gap: 8px;
  height: 34px; padding: 0 14px;
  border-radius: 7px; border: 1px solid var(--accent);
  background: var(--accent); color: var(--paper);
  font: 600 12.5px/1 'Inter Tight', sans-serif;
  text-decoration: none; cursor: pointer;
  transition: transform .15s, box-shadow .15s, filter .15s;
}
.get-started:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 14px -4px color-mix(in oklch, var(--accent) 55%, transparent);
  filter: brightness(1.05);
}
.get-started svg { width: 13px; height: 13px; }

.open-studio {
  display: inline-flex; align-items: center; gap: 8px;
  height: 34px; padding: 0 14px;
  border-radius: 7px; border: 1px solid var(--accent);
  background: var(--accent); color: var(--paper);
  font: 600 12.5px/1 'Inter Tight', sans-serif;
  text-decoration: none; cursor: pointer;
  transition: transform .15s, box-shadow .15s, filter .15s;
}
.open-studio:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 14px -4px color-mix(in oklch, var(--accent) 55%, transparent);
  filter: brightness(1.05);
}
.open-studio .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--paper); opacity: .85; }
.open-studio svg { width: 13px; height: 13px; }

/* ── Auth-state visibility (FOUC-safe) ──────────────────────── */
html:not([data-auth]) [data-auth-in],
html:not([data-auth]) [data-auth-out] { visibility: hidden; }
html[data-auth="in"]  [data-auth-out] { display: none !important; }
html[data-auth="out"] [data-auth-in]  { display: none !important; }

/* ── Mobile menu ────────────────────────────────────────────── */
.topbar-burger {
  display: none;
  width: 36px; height: 36px; padding: 0;
  background: transparent; border: 1px solid transparent;
  border-radius: 7px; cursor: pointer;
  color: var(--ink-2);
  align-items: center; justify-content: center;
  transition: background .15s, border-color .15s;
}
.topbar-burger:hover { background: var(--paper-2); border-color: var(--rule); color: var(--ink); }
.topbar-burger svg { width: 18px; height: 18px; }
.topbar-burger .icon-close { display: none; }
html[data-mobile-menu="open"] .topbar-burger .icon-open { display: none; }
html[data-mobile-menu="open"] .topbar-burger .icon-close { display: inline-block; }

.mobile-menu {
  position: fixed; top: 56px; left: 0; right: 0;
  z-index: 49;
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
  padding: 12px 16px 20px;
  display: none; flex-direction: column; gap: 4px;
  box-shadow: 0 20px 48px -16px oklch(0 0 0 / 0.18);
  animation: mm-fade .18s ease;
}
@keyframes mm-fade { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: translateY(0); } }
html[data-mobile-menu="open"] .mobile-menu { display: flex; }

.mobile-menu a {
  display: flex; align-items: center;
  padding: 12px 14px; border-radius: 8px;
  font: 500 14.5px/1.2 'Inter Tight', sans-serif;
  color: var(--ink-2); text-decoration: none;
  transition: background .12s, color .12s;
}
.mobile-menu a:hover,
.mobile-menu a:focus-visible { background: var(--paper-2); color: var(--ink); outline: none; }
.mobile-menu a.active,
.mobile-menu a[aria-current="page"] { background: var(--paper-2); color: var(--ink); }
.mobile-menu-cta { display: flex; gap: 8px; margin-top: 8px; padding: 0 14px; }
.mobile-menu-cta .sign-in,
.mobile-menu-cta .get-started,
.mobile-menu-cta .open-studio { flex: 1; justify-content: center; height: 40px; }

@media (max-width: 768px) {
  .topbar-burger { display: inline-flex; }
  .top-nav { display: none; }
  /* Hide desktop CTAs on mobile — they live in burger menu */
  .topbar .top-r > .sign-in,
  .topbar .top-r > .get-started,
  .topbar .top-r > .open-studio { display: none; }
}

/* ── Lock body scroll when mobile menu open ─────────────────── */
html[data-mobile-menu="open"] body { overflow: hidden; }

/* ── Print: hide topbar for clean blog post prints ──────────── */
@media print {
  .topbar, .mobile-menu, .skip-link { display: none !important; }
}