:root{--blue:#003087;--sky:#0070ba;--gold:#ffc439;--ink:#14213d;--mute:#5b6674;--line:#d3dae1}html,body,#root{height:100%;margin:0}body{font:15px/1.5 Inter,system-ui,-apple-system,Segoe UI,sans-serif;color:var(--ink);background:#f5f7fb}.shell{display:flex;flex-direction:column;height:100%}.bar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:10px 18px;background:var(--blue);color:#fff;border-bottom:4px solid var(--gold)}.brand{display:flex;align-items:center;gap:10px}.mark{width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:#fff;color:var(--blue);font-weight:800;font-style:italic}.eyebrow{font-size:11px;letter-spacing:.12em;text-transform:uppercase;opacity:.8}.bar nav{display:flex;gap:10px;align-items:center}.bar button,.bar a{padding:7px 16px;border:0;border-radius:999px;background:#fff;color:var(--blue);font:inherit;font-weight:650;cursor:pointer;text-decoration:none}.bar button:hover,.bar a:hover{background:#e8f3fb}:focus-visible{outline:2px solid var(--sky);outline-offset:2px}.hint{padding:6px 18px;background:#fff;border-bottom:1px solid var(--line);color:var(--mute)}.hint summary{cursor:pointer;color:var(--ink);font-weight:600}.hint ul{margin:6px 0 2px;padding-left:20px}.canvas{flex:1;min-height:0;position:relative}.canvas>div{height:100%;width:100%}.problem{margin:24px;padding:12px 14px;border-radius:8px;background:#f7e3e1;color:#7d2a25}.muted{margin:24px;color:var(--mute)}.gauge-box{height:100%;box-sizing:border-box;padding:16px 18px;display:flex;flex-direction:column;justify-content:center;gap:10px;font-family:inherit;color:var(--ink)}.gauge-empty{color:var(--mute);align-items:center;text-align:center}.gauge-pick select{font:inherit;padding:3px 6px;border:1px solid var(--line);border-radius:6px}.gauge-decision{font-size:22px;font-weight:700;letter-spacing:-.01em}.gauge-track{position:relative;height:14px;background:#e6ebf0;border-radius:7px;margin:8px 0 2px}.gauge-fill{position:absolute;left:0;top:0;height:100%;background:#0f6e6e;border-radius:7px}.gauge-over{position:absolute;top:0;height:100%;background:#c2453d;border-radius:0 7px 7px 0}.gauge-tick{position:absolute;top:-5px;width:2px;height:24px;background:var(--ink)}.gauge-labels{display:flex;justify-content:space-between;font-variant-numeric:tabular-nums}.gauge-meta{display:flex;flex-wrap:wrap;gap:6px 14px;font-size:13px;color:var(--mute)}.gauge-bad{color:#a63a3a;font-weight:600}