/* burntop.dev — mobile navigation (disclosure menu below 820px). */

.nav__toggle { display: none; }
.mnav { display: none; }

@media (max-width: 820px) {
  .nav__inner > .btn { margin-left: auto; }
  .nav__toggle { position: relative; display: grid; place-items: center; flex: none; width: 40px; height: 40px; margin-left: -12px; border-radius: var(--radius-sm); border: 1px solid var(--border-strong); background: rgba(255, 255, 255, 0.04); transition: background-color 0.2s, border-color 0.2s; }
  .nav__toggle:hover { background: rgba(255, 255, 255, 0.08); }
  .nav__toggle-bar { position: absolute; left: 12px; right: 12px; height: 1.5px; border-radius: 2px; background: var(--text); transition: transform 0.3s var(--ease); }
  .nav__toggle-bar:nth-child(1) { transform: translateY(-3.5px); }
  .nav__toggle-bar:nth-child(2) { transform: translateY(3.5px); }
  .nav__toggle[aria-expanded='true'] { border-color: rgba(255, 107, 0, 0.5); }
  .nav__toggle[aria-expanded='true'] .nav__toggle-bar:nth-child(1) { transform: rotate(45deg); }
  .nav__toggle[aria-expanded='true'] .nav__toggle-bar:nth-child(2) { transform: rotate(-45deg); }

  .mnav { position: absolute; top: 100%; left: 0; right: 0; display: flex; flex-direction: column; height: calc(100dvh - 64px); padding: 8px 24px calc(24px + env(safe-area-inset-bottom)); overflow-y: auto; overscroll-behavior: contain; background: var(--bg); border-top: 1px solid var(--border); transition: opacity 0.25s var(--ease), transform 0.25s var(--ease); }
  .mnav[hidden] { display: none; }
  .mnav__links { display: flex; flex-direction: column; }
  .mnav__links a { display: flex; align-items: center; justify-content: space-between; min-height: 56px; border-bottom: 1px solid var(--border); font-size: 20px; font-weight: 500; letter-spacing: -0.02em; color: var(--text); }
  .mnav__links a::after { content: '→'; font-size: 16px; color: var(--text-dim); transition: color 0.2s, transform 0.2s var(--ease); }
  .mnav__links a:hover::after, .mnav__links a:focus-visible::after { color: var(--ember-400); transform: translateX(3px); }
  .mnav__ctas { display: grid; gap: 10px; margin-top: auto; padding-top: 32px; }
  .mnav__ctas .btn { width: 100%; height: 48px; }
  .nav-open, .nav-open body { overflow: hidden; }
}

@media (max-width: 820px) and (prefers-reduced-motion: no-preference) {
  @starting-style { .mnav:not([hidden]) { opacity: 0; transform: translateY(-8px); } }
}