/* Mobile disclosure nav; .site-header sticky in layout.css */
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  min-width: 2.75rem;
  min-height: 2.75rem;
  padding: 0;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  background: var(--tile-chrome-soft);
  color: var(--color-text);
  cursor: pointer;
  touch-action: manipulation;
  transition: border-color var(--transition), background var(--transition);
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
  border-color: var(--color-accent);
  outline: none;
}

.nav-toggle:focus-visible {
  box-shadow: 0 0 0 2px var(--color-bg), 0 0 0 4px var(--color-accent);
}

.nav-toggle-lines {
  display: block;
  width: 1.1rem;
  height: 2px;
  background: currentColor;
  box-shadow: 0 -5px 0 currentColor, 0 5px 0 currentColor;
}

.site-nav-panel .site-nav a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

@media (max-width: 719px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav-panel {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 50;
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    transition: max-height 280ms var(--ease-fade), visibility 280ms;
    background: rgba(3, 8, 6, 0.82);
    border-bottom: 1px solid var(--glass-border);
    backdrop-filter: blur(var(--glass-blur-strong)) saturate(1.12);
    -webkit-backdrop-filter: blur(var(--glass-blur-strong)) saturate(1.12);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.45);
  }

  .site-header.is-nav-open .site-nav-panel {
    max-height: 18rem;
    visibility: visible;
  }

  .site-nav-panel .site-nav {
    flex-direction: column;
    gap: 0;
    padding: var(--space-sm) var(--space-lg) var(--space-md);
  }

  .site-nav-panel .site-nav a {
    display: flex;
    align-items: center;
    min-height: 2.75rem;
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--glass-border);
    touch-action: manipulation;
  }

  .site-nav-panel .site-nav li:last-child a {
    border-bottom: none;
  }
}