/* --- Menu Bar --- */
  .menubar {
    display: flex;
    align-items: center;
    background: var(--bg-menu);
    border-bottom: 2px solid var(--border);
    height: 32px;
    padding: 0 4px;
    user-select: none;
    font-size: 13px;
    color: var(--text);
  }

  /* On desktop the wrapper is transparent — its children participate in
     the menubar's flex layout directly. On mobile (≤ 900px) the whole
     wrapper is hidden and the hamburger button drives the separate
     mobile-menu component instead. */
  .menubar-items {
    display: contents;
  }

  /* Hamburger button — hidden on desktop, shown by the mobile media
     query at the bottom of this file. Tapping it opens the mobile-menu
     overlay (see .mm-* rules and assets/js/ui-mobile-menu.js). */
  .menubar-hamburger {
    display: none;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 28px;
    margin-right: 4px;
    background: none;
    border: none;
    color: var(--text);
    cursor: pointer;
    font-size: 16px;
    border-radius: 4px;
    padding: 0;
  }
  .menubar-hamburger:hover,
  .menubar-hamburger:focus-visible {
    background: rgba(255, 255, 255, 0.1);
    outline: none;
  }

  .menu-item {
    position: relative;
    padding: 4px 10px;
    cursor: pointer;
    border-radius: 4px;
  }

  .menu-item:hover,
  .menu-item.open {
    background: rgba(255,255,255,0.1);
  }

  .menubar.menu-active:not(.menu-keynav) .menu-item:hover > .menu-dropdown {
    display: block;
  }

  .menu-dropdown {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--bg-panel);
    border: 1px solid var(--accent);
    border-radius: 3px;
    padding: 4px 0;
    min-width: 160px;
    z-index: 100;
    box-shadow: 0 4px 16px rgba(0,0,0,.4);
  }

  .menu-item.open .menu-dropdown {
    display: block;
  }

  .menu-dropdown .option {
    padding: 6px 12px 6px 28px;
    cursor: pointer;
    white-space: nowrap;
    position: relative;
  }

  .menu-dropdown .option .check {
    position: absolute;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 10px;
  }

  .has-submenu::after {
    content: '\f054';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    font-size: 9px;
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
  }

  .submenu {
    display: none;
    position: absolute;
    left: 100%;
    top: -4px;
    background: var(--bg-panel);
    border: 1px solid var(--accent);
    border-radius: 3px;
    padding: 4px 0;
    min-width: 180px;
    box-shadow: 0 4px 16px rgba(0,0,0,.4);
  }

  .submenu.flip-left {
    left: auto;
    right: 100%;
  }

  .submenu.flip-up {
    top: auto;
    bottom: -4px;
  }

  .menubar .has-submenu.submenu-open > .submenu,
  .has-submenu.menu-focused > .submenu {
    display: block;
  }

  .menu-keynav .has-submenu.submenu-open > .submenu {
    display: none;
  }

  .menu-dropdown .option:hover:not(.disabled),
  .menu-dropdown .option.menu-focused {
    background: var(--hover);
  }

  .menu-dropdown .option.disabled {
    color: var(--text-muted);
    cursor: default;
    opacity: 0.5;
  }

  .menu-dropdown .separator {
    height: 1px;
    background: var(--border);
    margin: 4px 0;
  }

  .context-menu {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 200;
    font-size: 13px;
  }

  /* Context menu submenus: managed via JS mouseenter/mouseleave */
  .context-menu .has-submenu.submenu-open > .submenu {
    display: block;
  }

  .spacer { flex: 1; }

  .theme-toggle {
    padding: 4px 10px;
    cursor: pointer;
    border-radius: 4px;
    font-size: 13px;
  }
  .theme-toggle:hover { background: var(--menu-hover); }

  /* ── Mobile menubar (≤ 900px) ──────────────────────────────────────
     The horizontal desktop menubar items are hidden; only the hamburger
     stays. Tapping the hamburger drives the separate mobile-menu
     component (assets/js/ui-mobile-menu.js + .mm-* styles below). */
  @media (max-width: 900px) {
    .menubar-hamburger {
      display: inline-flex;
    }
    .menubar-items {
      display: none;
    }
    /* The theme toggle icon is redundant on small screens — the same
       setting is reachable from Options → Theme. */
    .theme-toggle {
      display: none;
    }
  }

  /* ── Mobile menu (drill-down, touch-first) ─────────────────────────
     A separate full-panel component that overlays the content area
     below the menubar. Each level of the menu is rendered as a flat
     list — tapping a row either drills into its submenu (chevron) or
     fires the original desktop option's click handler. This avoids the
     accordion's tap-precision problems where a tap on "Help" might
     land on "Changelog" because the dropdown is rendered inline below
     the header. */
  .mm-root {
    display: none;
    position: fixed;
    top: 32px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-panel);
    z-index: 200;
    flex-direction: column;
    user-select: none;
  }
  .mm-root.mm-open {
    display: flex;
  }

  .mm-header {
    display: flex;
    align-items: center;
    gap: 8px;
    height: 48px;
    padding: 0 8px;
    background: var(--bg-menu);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
  }
  .mm-header .mm-back,
  .mm-header .mm-close {
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    color: var(--text);
    cursor: pointer;
    border-radius: 4px;
    font-size: 16px;
  }
  .mm-header .mm-back:hover,
  .mm-header .mm-back:active,
  .mm-header .mm-close:hover,
  .mm-header .mm-close:active {
    background: rgba(255, 255, 255, 0.08);
  }
  .mm-header .mm-back[hidden] {
    display: none;
  }
  .mm-header .mm-title {
    flex: 1;
    text-align: center;
    font-size: 15px;
    font-weight: bold;
    color: var(--text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    padding-right: 40px; /* balance the back button on the left */
  }
  .mm-header .mm-back:not([hidden]) ~ .mm-title {
    padding-right: 0;
  }

  .mm-list {
    flex: 1;
    overflow-y: auto;
    padding: 4px 0;
  }

  .mm-item {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 16px 16px;
    background: none;
    border: none;
    border-bottom: 1px solid var(--border);
    color: var(--text);
    font-size: 15px;
    text-align: left;
    cursor: pointer;
  }
  .mm-item:active:not(.mm-disabled) {
    background: rgba(255, 255, 255, 0.06);
  }
  .mm-item.mm-disabled {
    color: var(--text-muted);
    opacity: 0.5;
    cursor: default;
  }
  .mm-item .mm-check {
    width: 18px;
    color: var(--accent);
    flex-shrink: 0;
    text-align: center;
    font-size: 12px;
  }
  .mm-item:not(.mm-has-check) .mm-check {
    /* preserve alignment when not all rows have a check column */
  }
  .mm-item .mm-label {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .mm-item .mm-chevron {
    color: var(--text-muted);
    font-size: 11px;
    flex-shrink: 0;
  }

  .mm-separator {
    height: 1px;
    background: var(--border);
    margin: 6px 0;
  }