.article-menu-button { display: none; }
.article-menu-button,
.article-menu-close {
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--text);
  cursor: pointer;
}
.article-menu-close { display: inline-flex; }
.article-menu-button:hover,
.article-menu-close:hover { background: var(--bg-gray); }
.article-menu-button:focus-visible,
.article-menu-close:focus-visible,
.article-navigation-links a:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
}
.article-navigation {
  position: fixed;
  inset: 0 0 0 auto;
  width: min(320px, 85vw);
  max-width: none;
  height: 100%;
  height: 100dvh;
  max-height: none;
  margin: 0;
  padding: max(16px, env(safe-area-inset-top)) max(20px, env(safe-area-inset-right)) max(24px, env(safe-area-inset-bottom)) 20px;
  border: 0;
  border-left: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  box-shadow: -12px 0 40px #1a1a2e1a;
  overscroll-behavior: contain;
}
.article-navigation::backdrop { background: #1a1a2e66; }
.article-navigation[open] { animation: article-navigation-enter 180ms ease-out; }
.article-navigation-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.article-navigation-header h2 { font-size: 1rem; }
.article-navigation-links { display: grid; gap: 8px; padding-top: 20px; }
.article-navigation-links a { padding: 13px 16px; border-radius: 8px; font-size: 1rem; }
.article-navigation-links a:hover,
.article-navigation-links a[aria-current] { background: var(--primary-light); color: var(--primary-dark); }
.article-menu-open,
.article-menu-open body { overflow: hidden; }
@media (max-width: 768px) {
  .article-navbar .nav-right { display: none; }
  .article-navbar .article-menu-button { display: inline-flex; }
}
@keyframes article-navigation-enter {
  from { transform: translateX(100%); }
  to { transform: translateX(0); }
}
@media (prefers-reduced-motion: reduce) {
  .article-navigation[open] { animation: none; }
}