/* =====================================================================
   Smart navbar — 4-state morph for .ao-nav (site) and .tnav (learn).
   Driven by navbar.js; liquid-glass.js supplies --lg-filter.

   State 1  .nav-top     — full-width, transparent, flat on the fold.
                           .nav-on-dark flips text white over night-sky.
   State 2  .nav-pill    — floating glass pill (max 1160px, inset 16px,
                           full radius, frosted + refraction).
   State 4  .nav-hidden  — translated up + faded (scroll down); returns
                           on the smallest scroll up.
   (State 3 mega-menu: hooks ready — arrives with real submenus.)
   ===================================================================== */

.ao-nav, .tnav {
  position: fixed !important;
  top: 0; left: 0; right: 0;
  z-index: 60;
  margin: 0 auto;
  /* Layout legs kept short (they trigger per-frame layout+paint); the
     radius + background morph carries the perceived effect. max-width
     snaps deliberately — animating it stacked jank on the filter cost. */
  transition:
    top .3s var(--ease-standard, cubic-bezier(.22, 1, .36, 1)),
    left .3s var(--ease-standard, cubic-bezier(.22, 1, .36, 1)),
    right .3s var(--ease-standard, cubic-bezier(.22, 1, .36, 1)),
    border-radius .45s var(--ease-standard, cubic-bezier(.22, 1, .36, 1)),
    background .35s ease,
    box-shadow .35s ease,
    border-color .35s ease,
    transform .32s ease,
    opacity .32s ease;
}

/* Pages whose first fold is NOT a dark sky get body padding so content
   doesn't hide under the fixed bar (navbar.js toggles the class). */
body.nav-solid-offset { padding-top: var(--nav-h, 68px); }
/* Dark-fold pages: the fold slides under the transparent bar instead —
   give the fold breathing room at the top. */
body.nav-overlap .hero--sky { padding-top: 132px; }
body.nav-overlap .ao-blog-hero { padding-top: clamp(112px, 13vw, 156px); }

/* ---- State 1: flat & transparent on the fold ---- */
.ao-nav.nav-top, .tnav.nav-top {
  background: transparent;
  border-bottom-color: transparent;
  box-shadow: none;
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
}
/* Over a dark fold, text/logo flip to white. */
.nav-top.nav-on-dark .ao-nav-link,
.nav-top.nav-on-dark .ao-brand-name { color: rgba(255,255,255,.92); }
.nav-top.nav-on-dark .ao-nav-link.is-active { color: #fff; }
.nav-top.nav-on-dark .ao-nav-link:hover { color: var(--abdul-salmon-300); }
.nav-top.nav-on-dark .tnav-brand-text,
.nav-top.nav-on-dark .tnav-login { color: rgba(255,255,255,.92) !important; }
.nav-top.nav-on-dark .tnav-brand-text small { color: rgba(255,255,255,.6); }
.nav-top.nav-on-dark .tnav-support { color: #9ddfff; border-color: rgba(157,223,255,.4); background: rgba(157,223,255,.1); }

/* ---- State 2: the floating pill ---- */
.ao-nav.nav-pill, .tnav.nav-pill {
  top: 12px;
  left: 16px;
  right: 16px;
  max-width: 1160px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.45);
  background: rgba(252, 251, 248, 0.62);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.55),
    0 10px 34px rgba(31, 10, 82, 0.12);
}
/* Refraction / frosted glass only in pill state. */
.nav-pill.lg-active {
  backdrop-filter: var(--lg-filter);
  -webkit-backdrop-filter: var(--lg-filter);
  background: rgba(252, 251, 248, 0.42);
}
.nav-pill.lg-fallback {
  backdrop-filter: saturate(1.7) blur(22px);
  -webkit-backdrop-filter: saturate(1.7) blur(22px);
}
/* Tighter chrome inside the pill */
.ao-nav.nav-pill { padding-top: 10px; padding-bottom: 10px; }
.tnav.nav-pill .tnav-inner { padding-top: 8px; padding-bottom: 8px; }

/* ---- State 4: hidden while scrolling down ---- */
.ao-nav.nav-hidden, .tnav.nav-hidden {
  transform: translateY(-120%);
  opacity: 0;
  pointer-events: none;
}

/* ---- Mega-menu hooks (state 3 — dormant until submenus exist) ---- */
.nav-pill.nav-menu-open { border-bottom-left-radius: 0; border-bottom-right-radius: 0; }

/* =====================================================================
   Mobile — burger + glass panel
   ===================================================================== */
.nav-burger {
  display: none;
  width: 42px; height: 42px;
  border: 0; background: transparent; cursor: pointer;
  border-radius: var(--r-pill);
  align-items: center; justify-content: center;
  flex-direction: column; gap: 5px;
  -webkit-tap-highlight-color: transparent;
}
.nav-burger span {
  display: block; width: 20px; height: 2px; border-radius: 2px;
  background: var(--fg-primary);
  transition: transform .3s cubic-bezier(.22,1,.36,1), opacity .2s ease, background .3s ease;
}
.nav-top.nav-on-dark .nav-burger span { background: #fff; }
.nav-burger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger.is-open span:nth-child(2) { opacity: 0; }
.nav-burger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 900px) {
  .nav-burger { display: flex; }
  .ao-nav .ao-nav-links { display: none; }
  .tnav .tnav-actions .tnav-login { display: none; } /* moved into the panel */
}

.nav-mobile-panel {
  position: fixed;
  z-index: 59;
  left: 16px; right: 16px;
  top: calc(var(--nav-h, 68px) + 16px);
  border-radius: 20px;
  padding: 12px;
  background: rgba(252, 251, 248, 0.9);
  backdrop-filter: saturate(1.7) blur(24px);
  -webkit-backdrop-filter: saturate(1.7) blur(24px);
  border: 1px solid rgba(255, 255, 255, 0.5);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.55), 0 18px 50px rgba(31, 10, 82, 0.18);
  transform: scale(.97) translateY(-10px);
  opacity: 0;
  pointer-events: none;
  transition: transform .34s cubic-bezier(.22,1,.36,1), opacity .26s ease;
}
.nav-mobile-panel.is-open {
  transform: scale(1) translateY(0);
  opacity: 1;
  pointer-events: auto;
}
.nav-mobile-panel a {
  display: flex; align-items: center; gap: 10px;
  padding: 13px 16px;
  border-radius: 14px;
  text-decoration: none;
  color: var(--fg-primary);
  font-weight: 700; font-size: 15.5px;
  font-family: var(--font-arabic);
  opacity: 0; transform: translateX(12px); /* RTL: slide in from the right */
  transition: opacity .3s ease, transform .3s cubic-bezier(.22,1,.36,1), background .2s ease;
}
.nav-mobile-panel.is-open a { opacity: 1; transform: translateX(0); }
.nav-mobile-panel a:hover, .nav-mobile-panel a:active { background: var(--bg-sunken); }
.nav-mobile-panel a.is-cta {
  background: var(--abdul-gradient-salmon);
  color: #fff; justify-content: center;
  box-shadow: var(--glow-salmon);
  margin-top: 6px;
}

@media (prefers-reduced-motion: reduce) {
  .ao-nav, .tnav, .nav-mobile-panel, .nav-mobile-panel a, .nav-burger span { transition: none; }
}