.node-state-host--a .book-view__toc-chapter-link,.node-state-host--a .book-view__toc-chapter-link .book-view__toc-chapter-number,.node-state-host--a .book-view__toc-subchapter-link{color:#9ca3af}.node-state-host--a .book-view__toc-chapter-link:hover,.node-state-host--a .book-view__toc-subchapter-link:hover{color:#6b7280}.node-state-controls{position:relative;display:inline-flex;align-items:center;margin-left:8px;flex:0 0 auto}.node-state-controls--placeholder{visibility:hidden;pointer-events:none}.node-state-trigger{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border:1px solid transparent;background:0 0;border-radius:7px;padding:0;cursor:pointer;color:rgba(0,0,0,.35);opacity:1;transition:background 120ms ease,border-color 120ms ease,color 120ms ease}.book-view__toc-chapter-header:hover .node-state-trigger,.book-view__toc-subchapter-item:hover .node-state-trigger,.node-state-trigger:focus-visible{color:var(--book-text-primary, #1c1917)}.node-state-trigger:hover{background:rgba(0,0,0,.04);color:var(--book-text-primary, #1c1917)}.node-state-trigger.is-open,.node-state-trigger[aria-expanded=true]{opacity:1;background:#fffbe9;border-color:#f0d97a;color:#8a6a00}.node-state-trigger:focus-visible{outline:2px solid #2563eb;outline-offset:1px}.node-state-trigger svg{width:14px;height:14px}.bk-toc-menu{position:fixed;z-index:1100;min-width:252px;background:#fff;border:1px solid var(--book-border, #d6d3d1);border-radius:10px;box-shadow:0 12px 32px rgba(20,20,40,.15),0 1px 3px rgba(0,0,0,.06);padding:6px;font-family:var(--book-font-sans, 'Inter', system-ui, sans-serif);font-size:13px;color:var(--book-text-primary, #1c1917)}.bk-toc-menu__seg{display:flex;align-items:center;gap:8px;padding:8px 8px 4px}.bk-toc-menu__seg-label{font-size:10px;font-weight:700;letter-spacing:.08em;color:var(--book-text-tertiary, #8a8a8a);text-transform:uppercase}.bk-toc-menu__seg-track{display:inline-flex;gap:2px;flex:1 1 auto;background:#ecebe5;padding:2px;border-radius:8px}.bk-toc-menu__tab{flex:1 1 0;display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:5px 8px;font-size:11.5px;font-weight:600;color:var(--book-text-tertiary, #8a8a8a);border-radius:6px;white-space:nowrap;user-select:none}.bk-toc-menu__tab-dot{width:7px;height:7px;border-radius:999px;background:currentColor;opacity:.5}.bk-toc-menu__tab.draft.active,.bk-toc-menu__tab.prod.active{background:#fff;color:#2a5fb8;box-shadow:0 1px 2px rgba(0,0,0,.08),0 0 0 1px rgba(0,0,0,.04)}.bk-toc-menu__tab.prod.active{color:#137a3a}.bk-toc-menu__tab.active .bk-toc-menu__tab-dot{opacity:1}.bk-toc-menu__tab.is-disabled{opacity:.55}.bk-toc-menu__tab-tag{font-size:9px;text-transform:uppercase;color:var(--book-text-tertiary, #8a8a8a);font-weight:700;letter-spacing:.04em}.bk-toc-menu__state-line{display:flex;align-items:center;gap:6px;font-size:11.5px;color:var(--book-text-secondary, #57534e);padding:4px 10px 8px}.bk-toc-menu__warn-dot{width:7px;height:7px;border-radius:999px;background:#d97706;flex:0 0 auto}.bk-toc-menu__sep{height:1px;background:var(--book-rule, #ececec);margin:4px -2px}.bk-toc-menu__row{display:flex;align-items:center;gap:10px;padding:8px 10px;margin:0-4px;border-radius:7px;font-size:13px;color:var(--book-text-primary, #1c1917);background:0 0;border:0;width:calc(100% + 8px);text-align:left;cursor:pointer;font-family:inherit}.bk-toc-menu__row:hover{background:rgba(0,0,0,.04)}.bk-toc-menu__row:focus-visible{outline:2px solid #2563eb;outline-offset:-2px}.bk-toc-menu__ic{width:16px;display:inline-grid;place-content:center;color:var(--book-text-tertiary, #8a8a8a);flex:0 0 auto}.bk-toc-menu__row.danger:hover{background:#fdf4f4}.bk-toc-menu__row.danger,.bk-toc-menu__row.danger .bk-toc-menu__ic{color:#c43a3a}.bk-toc-menu__row[disabled]{cursor:not-allowed}.bk-toc-menu__row[disabled]:hover{background:0 0}.bk-toc-menu__row[disabled],.bk-toc-menu__row[disabled] .bk-toc-menu__ic{color:var(--book-text-tertiary, #8a8a8a)}.bk-toc-menu__label{flex:0 1 auto}.bk-toc-menu__hint{margin-left:auto;font-size:10.5px;color:var(--book-text-tertiary, #8a8a8a);font-style:italic}.bk-toc-modal-overlay{position:fixed;inset:0;z-index:1000;background:rgba(20,20,30,.35);display:flex;align-items:center;justify-content:center;padding:16px}.bk-toc-modal{width:320px;max-width:100%;background:#fff;border-radius:14px;box-shadow:0 16px 40px rgba(0,0,0,.18);padding:18px 20px;font-family:var(--book-font-sans, 'Inter', system-ui, sans-serif);color:var(--book-text-primary, #1c1917)}.bk-toc-modal__head{display:flex;align-items:center;gap:12px;margin-bottom:10px}.bk-toc-modal__icon{width:32px;height:32px;border-radius:999px;background:#fde6e6;color:#c43a3a;display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto}.bk-toc-modal__icon svg{width:16px;height:16px}.bk-toc-modal__title-wrap{flex:1 1 auto;min-width:0}.bk-toc-modal__title{margin:0;font-family:var(--book-font-serif, 'Source Serif 4', Georgia, serif);font-weight:700;font-size:16px;line-height:1.2}.bk-toc-modal__subtitle{font-size:12.5px;color:var(--book-text-tertiary, #8a8a8a);margin-top:2px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.bk-toc-modal__body{margin:0 0 16px;font-size:13px;line-height:1.5;color:var(--book-text-secondary, #57534e)}.bk-toc-modal__footer{display:flex;justify-content:flex-end;gap:8px}.bk-toc-btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:8px 14px;font:inherit;font-size:13px;font-weight:600;border-radius:8px;border:1px solid var(--book-border, #d6d3d1);background:#fff;color:var(--book-text-primary, #1c1917);cursor:pointer;transition:background 120ms ease,border-color 120ms ease}.bk-toc-btn:hover{background:rgba(0,0,0,.03)}.bk-toc-btn[disabled]{opacity:.5;cursor:not-allowed}.bk-toc-btn--danger{background:#fde6e6;color:#c43a3a;border-color:#f3d3d3}.bk-toc-btn--danger:hover:not([disabled]){background:#fbd5d5}