:root{--ink: #0f1115;--ink-2: #171a21;--ink-3: #1f232c;--line: #2a2f3a;--line-soft: #e3e5e9;--paper: #f3f4f6;--paper-2: #ffffff;--text: #e8eaee;--text-dim: #9aa1ad;--text-ink: #1b1e25;--text-ink-dim: #6b7280;--accent: #3b82f6;--accent-2: #fad200;--radius: 10px;--font-display: "Space Grotesk", system-ui, sans-serif;--font-body: "Inter", system-ui, sans-serif;--font-mono: "Space Mono", ui-monospace, monospace;--header-h: 52px}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:var(--font-body);color:var(--text-ink);background:var(--paper);-webkit-font-smoothing:antialiased}.app{display:flex;flex-direction:column;height:100vh}.app-header{height:var(--header-h);background:var(--ink);border-bottom:1px solid var(--line);display:flex;align-items:center;padding:0 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var(--line);border-radius:8px;overflow:hidden}.zoom-btn{flex:none;width:34px;height:32px;padding:0;border-radius:0;border:none;background:transparent;font-size:18px;font-weight:400;color:var(--text-dim);border-right:1px solid var(--line)}.zoom-btn:last-child{border-right:none;border-left:1px solid var(--line)}.zoom-btn:hover:not(:disabled){background:var(--ink-3);color:var(--text);border-color:var(--line)}.zoom-btn:disabled{opacity:.3;cursor:default}.zoom-label{flex:1;text-align:center;font-family:var(--font-mono);font-size:12px;color:var(--text)}.ref-section{border-top:1px solid var(--line);padding-top:14px}.ref-upload{display:flex;align-items:center;justify-content:center;padding:9px 12px;border-radius:8px;border:1.5px dashed var(--line);background:var(--ink-2);color:var(--text-dim);font-size:12px;cursor:pointer;transition:all .12s;text-align:center}.ref-upload:hover{border-color:var(--accent);color:var(--text)}.ref-upload 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