/* VNAV Flight Labs - shared navigation styles
 * 1. Logo sizing (header lockup + footer logo)
 * 2. Mobile menu ("hamburger") for screens narrower than 860px
 * Loaded after each page's own <style>, so it wins where the two overlap.
 * The menu button itself is added by site-nav.js.
 */

/* ---------- logo ---------- */
.logo.logo-img { display: flex; align-items: center; line-height: 0; text-decoration: none; }
.logo.logo-img img, .logo.logo-img svg { display: block; }
nav { padding-top: 15px; padding-bottom: 15px; }
.footer-brand .logo-img img, .footer-brand .logo-img svg { max-width: 100%; height: auto; }

/* ---------- menu button: hidden on desktop ---------- */
.nav-toggle { display: none; }

/* ---------- mobile / narrow screens ---------- */
@media (max-width: 859px) {
  nav { position: relative; flex-wrap: nowrap; justify-content: flex-start; gap: 12px; padding: 14px 24px; }
  nav .logo { margin-right: auto; }
  nav .logo-img img, nav .logo-img svg { max-height: 40px; width: auto; }

  .nav-toggle {
    display: inline-flex; align-items: center; justify-content: center;
    width: 44px; height: 44px; margin: 0 -10px 0 0; padding: 0;
    background: none; border: 0; cursor: pointer; -webkit-tap-highlight-color: transparent;
  }
  .nav-toggle:focus-visible { outline: 2px solid var(--accent, #3D93EF); outline-offset: 2px; border-radius: 4px; }

  /* three bars that turn into an X when the menu is open */
  .nav-toggle-bars, .nav-toggle-bars::before, .nav-toggle-bars::after {
    display: block; width: 22px; height: 2px; border-radius: 2px;
    background: var(--off-white, #0A0A0A); transition: transform .2s ease, background-color .2s ease;
  }
  .nav-toggle-bars { position: relative; }
  .nav-toggle-bars::before, .nav-toggle-bars::after { content: ""; position: absolute; left: 0; }
  .nav-toggle-bars::before { top: -7px; }
  .nav-toggle-bars::after  { top: 7px; }
  nav.menu-open .nav-toggle-bars { background: transparent; }
  nav.menu-open .nav-toggle-bars::before { transform: translateY(7px) rotate(45deg); }
  nav.menu-open .nav-toggle-bars::after  { transform: translateY(-7px) rotate(-45deg); }

  /* dropdown panel under the header */
  nav .nav-links {
    display: none; position: absolute; top: 100%; left: 0; right: 0; z-index: 100;
    flex-direction: column; align-items: stretch; gap: 0; padding: 4px 24px 12px;
    background: #FFFFFF; border-bottom: 1px solid var(--hairline, #E4E7EC);
    box-shadow: 0 16px 24px rgba(0, 25, 91, 0.08);
  }
  nav.menu-open .nav-links { display: flex; }
  nav .nav-links a {
    display: block; padding: 16px 0; font-size: 17px;
    color: var(--off-white, #0A0A0A); border-bottom: 1px solid var(--hairline, #E4E7EC);
  }
  nav .nav-links a:last-child { border-bottom: 0; }

  .footer-brand { grid-column: 1 / -1; }
}

/* very small phones */
@media (max-width: 400px) {
  nav { padding: 12px 16px; gap: 8px; }
  nav .logo-img img, nav .logo-img svg { max-height: 36px; }
  nav .nav-cta { padding: 8px 12px; font-size: 13px; }
}