:root{--navy: #0a1f40;--navy-dark: #010f23;--blue: #0066cc;--teal: #0fa3a3;--teal-soft: #e3f6f6;--orange: #f28c28;--orange-dark: #c96a0f;--grey: #808080;--bg: #f4f6fa;--panel: #ffffff;--text: #141414;--muted: #5b6474;--line: #dde2ea;--user: #e6eef9;--code-bg: #f1f4f8;--err: #b42318;--err-bg: #fef3f2;font-family:Source Sans Pro,"Source Sans 3",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--text);background:var(--bg)}@media(prefers-color-scheme:dark){:root{--bg: #010f23;--panel: #0a1f40;--text: #eef2f8;--muted: #a3afc2;--line: #1f3558;--user: #12305e;--code-bg: #06162f;--teal-soft: #0b3a45;--err: #fda29b;--err-bg: #2a1614}}*{box-sizing:border-box}body{margin:0;background:var(--bg)}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}.print-only{display:none}.app{height:100vh;display:flex;flex-direction:column}.topbar{display:flex;align-items:center;gap:16px;flex-wrap:wrap;padding:12px 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