:root{--bg: #fbfbfa;--grid: rgba(15, 23, 42, .055);--ink: #111827;--ink-soft: #6b7280;--line: rgba(15, 23, 42, .12);--panel: #ffffff;--panel-edge: rgba(15, 23, 42, .1);--root-bg: #1f2937;--focus: #2563eb;--shadow: 0 1px 2px rgba(15, 23, 42, .08), 0 8px 24px rgba(15, 23, 42, .08);--font: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, "Helvetica Neue", sans-serif}@media(prefers-color-scheme:dark){:root{--bg: #16181d;--grid: rgba(255, 255, 255, .05);--ink: #e8eaed;--ink-soft: #9aa1ad;--line: rgba(255, 255, 255, .14);--panel: #1e2127;--panel-edge: rgba(255, 255, 255, .11);--root-bg: #394150;--focus: #60a5fa;--shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .35)}}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:var(--font);color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased;overscroll-behavior:none}.app{display:flex;flex-direction:column;height:100%}.toolbar{position:relative;z-index:30;display:flex;align-items:center;gap:16px;padding:0 14px;height:48px;flex:0 0 48px;background:var(--panel);border-bottom:1px solid var(--panel-edge)}.brand{display:flex;align-items:center;gap:8px}.brand-mark{width:10px;height:10px;border-radius:50%;background:#0d9488;box-shadow:7px -5px 0 -2.5px #d97706,7px 5px 0 -2.5px #2563eb}.brand-name{font-weight:600;font-size:14px;letter-spacing:-.01em}.doc-title{flex:1;min-width:0;display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-soft);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.save-dot{flex:none;width:6px;height:6px;border-radius:50%;background:var(--focus);opacity:.9;transition:background .25s ease,opacity .25s 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transparent;outline-offset:0;transition:outline-color .12s ease,background-color .12s ease}.node-root{background:var(--root-bg);color:#fff;border-radius:999px;text-align:center;box-shadow:var(--shadow)}.node-branch:hover{background:color-mix(in srgb,var(--branch) 10%,transparent)}.node.is-selected{outline-color:var(--branch);background:color-mix(in srgb,var(--branch) 12%,transparent)}.node-root.is-selected{outline-color:var(--focus);background:var(--root-bg)}.node.is-drop-target{outline-color:var(--focus);outline-style:dashed;outline-width:2px;background:color-mix(in srgb,var(--focus) 16%,transparent)}.node.is-dragging{opacity:.85;cursor:grabbing}.node-text{width:100%;white-space:pre}.node[data-side="-1"] .node-text{text-align:right}.node-root 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