/* --- Content --- */
  .content {
    max-width: 720px;
    margin: 0 auto;
    padding: 24px 16px;
  }

  .empty-state {
    text-align: center;
    color: var(--text-muted);
    margin-top: 80px;
    font-size: 14px;
    line-height: 2;
  }

  .empty-state a {
    color: var(--selected-text);
    text-decoration: none;
    cursor: pointer;
  }

  .empty-state a:hover {
    text-decoration: underline;
  }

  .empty-drop-zone {
    border: 2px dashed var(--border);
    border-radius: 8px;
    padding: 40px 32px;
    margin: 0 auto;
    max-width: 420px;
    transition: border-color 0.2s, background 0.2s;
  }

  .empty-drop-zone:hover {
    border-color: var(--selected-text);
  }

  /* --- Tab Bar --- */
  /* The wrap holds the scrollable strip plus three controls that appear
     only when the tabs overflow (.tab-bar-overflow class added by JS):
       <  scroll left
       >  scroll right
       »  open a dropdown listing every tab
     The strip itself is always one row, scrolls horizontally, and hides
     its scrollbar so the only way to scroll is via the buttons / drag /
     touch swipe — keeps the chrome clean. */
  .tab-bar-wrap {
    display: flex;
    align-items: stretch;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
  }
  .tab-bar-wrap:has(.tab-bar:empty) { display: none; }

  .tab-bar {
    display: flex;
    gap: 2px;
    padding: 4px 10px 0;
    background: var(--bg);
    overflow-x: auto;
    flex: 1;
    min-width: 0;
    /* Hide the native scrollbar — buttons / swipe drive scrolling. */
    scrollbar-width: none;
    /* Anchor for the absolutely-positioned drag-drop indicator. */
    position: relative;
  }
  .tab-bar::-webkit-scrollbar { display: none; }

  .tab-bar:empty { display: none; }

  .tab-scroll-btn,
  .tab-list-btn {
    display: none;
    align-items: center;
    justify-content: center;
    width: 32px;
    background: var(--bg);
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 12px;
    padding: 0;
    flex-shrink: 0;
  }
  .tab-scroll-btn:hover,
  .tab-list-btn:hover {
    color: var(--text);
    background: var(--hover);
  }
  .tab-scroll-btn:disabled {
    opacity: 0.3;
    cursor: default;
  }
  .tab-list-btn[aria-expanded="true"] {
    color: var(--accent);
    background: var(--hover);
  }
  .tab-bar-wrap.tab-bar-overflow .tab-scroll-btn,
  .tab-bar-wrap.tab-bar-overflow .tab-list-btn {
    display: inline-flex;
  }

  /* Floating dropdown listing every open tab — anchored below the »
     button. Each row mirrors the tab's appearance (dirty asterisk, tape
     badge) so users can spot what they're picking. */
  .tab-list-dropdown {
    position: fixed;
    background: var(--bg-panel);
    border: 1px solid var(--accent);
    border-radius: 4px;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.45);
    padding: 4px 0;
    min-width: 220px;
    max-width: min(360px, calc(100vw - 16px));
    max-height: 70vh;
    overflow-y: auto;
    z-index: 200;
  }
  .tab-list-dropdown-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    font-size: 13px;
    cursor: pointer;
    color: var(--text);
    white-space: nowrap;
  }
  .tab-list-dropdown-item:hover {
    background: var(--hover);
  }
  .tab-list-dropdown-item.active {
    color: var(--accent);
  }
  .tab-list-dropdown-item .tab-list-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .tab-list-dropdown-item .tab-list-close {
    color: var(--text-muted);
    opacity: 0.5;
    flex-shrink: 0;
    padding: 2px 4px;
    border-radius: 2px;
  }
  .tab-list-dropdown-item .tab-list-close:hover {
    opacity: 1;
    color: var(--color-error);
    background: rgba(0, 0, 0, 0.2);
  }

  .tab {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 5px 10px;
    font-size: 12px;
    cursor: pointer;
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-bottom: none;
    border-radius: 4px 4px 0 0;
    color: var(--text-muted);
    white-space: nowrap;
    max-width: 180px;
    overflow: hidden;
    /* Don't shrink to fit — keep tabs at their natural / 180px width
       so the strip overflows horizontally when too many are open. The
       overflow controls in .tab-bar-wrap rely on scrollWidth growing. */
    flex-shrink: 0;
  }

  .tab.active {
    background: var(--bg);
    color: var(--selected-text);
    border-color: var(--accent);
    border-bottom: 1px solid var(--bg);
  }

  /* Drag-to-reorder visuals. The dragged tab fades; a single floating
     bar (#tab-drop-line) — not per-tab pseudo-elements — shows the drop
     boundary. Keeping tab geometry stable while dragging avoids the
     dragenter/leave loop that any layout-shifting indicator would
     trigger on a flex container. */
  .tab.tab-dragging {
    opacity: 0.4;
  }
  .tab-drop-line {
    position: absolute;
    top: 4px;
    bottom: 0;
    width: 4px;
    margin-left: -2px; /* center on the boundary X */
    border-radius: 2px;
    background: var(--accent);
    box-shadow: 0 0 10px var(--accent), 0 0 3px var(--accent);
    pointer-events: none;
    z-index: 1;
  }

  /* Disk icon at the start of every tab (and tab-list dropdown row) —
     replaces the legacy "* " dirty indicator. Muted by default, turns
     red when the tab has unsaved changes (.tab-dirty). Uses
     --color-error which is tuned for both light and dark themes. */
  .tab-disk-icon {
    font-size: 11px;
    color: var(--text-muted);
    flex-shrink: 0;
  }
  .tab.tab-dirty .tab-disk-icon,
  .tab-list-dropdown-item.tab-dirty .tab-disk-icon {
    color: var(--color-error);
  }

  .tab:hover:not(.active) {
    color: var(--text);
    background: var(--hover);
  }

  /* Tab context menu — right-click / long-press on a tab. Built fresh
     each time, dismissed via outside click / Escape / another right-click
     elsewhere. Mirrors menu-dropdown styling but stands on its own so
     it doesn't depend on .menu-item.open / .menu-active state. */
  .tab-context-menu {
    position: fixed;
    z-index: 200;
    background: var(--bg-panel);
    border: 1px solid var(--accent);
    border-radius: 4px;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.45);
    padding: 4px 0;
    min-width: 200px;
    font-size: 13px;
    color: var(--text);
  }
  .tab-context-menu .tab-ctx-item {
    padding: 6px 14px;
    cursor: pointer;
    white-space: nowrap;
  }
  .tab-context-menu .tab-ctx-item:hover:not(.disabled) {
    background: var(--hover);
  }
  .tab-context-menu .tab-ctx-item.disabled {
    color: var(--text-muted);
    cursor: default;
    opacity: 0.5;
  }
  .tab-context-menu .tab-ctx-separator {
    height: 1px;
    background: var(--border);
    margin: 4px 0;
  }

  .tape-warning {
    color: var(--color-warn-gold);
    font-size: 12px;
  }

  .tape-warning .fa-triangle-exclamation {
    margin-right: 4px;
  }

  .tab-tape-badge {
    font-size: 9px;
    background: var(--accent);
    color: #fff;
    padding: 1px 4px;
    border-radius: 3px;
    font-weight: bold;
    letter-spacing: 0.5px;
  }

  .tab-name {
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .tab-close {
    font-size: 10px;
    opacity: 0.5;
    cursor: pointer;
    flex-shrink: 0;
  }

  .tab-close:hover {
    opacity: 1;
    color: var(--c64-control);
  }