:root{--paper: #f6f1e7;--ink: #1b1a17;--muted: #6b665c;--hue: #e4572e;--hue-dark: #b83f1a;--good: #2b8a3e;--bad: #c92a2a;--card: #ffffff;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;color:var(--ink);background:var(--paper)}*{box-sizing:border-box}body{margin:0;background:var(--paper)}#app{max-width:480px;margin:0 auto;padding:20px 16px 48px;min-height:100vh}h1{font-size:28px;margin:8px 0 4px;letter-spacing:-.01em}h2{font-size:20px;margin:24px 0 8px}p{line-height:1.45;margin:8px 0}.muted{color:var(--muted)}.brand{font-weight:800;font-size:14px;letter-spacing:.12em;text-transform:uppercase;color:var(--hue-dark)}.stack{display:flex;flex-direction:column;gap:12px}.row{display:flex;gap:10px;align-items:center}.card{background:var(--card);border-radius:16px;padding:16px;box-shadow:0 1px 2px #0000000f}button,.button{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:0;border-radius:14px;padding:16px 18px;font:inherit;font-weight:700;font-size:17px;cursor:pointer;text-align:center;text-decoration:none;display:block;width:100%;background:var(--hue);color:#fff}button.paper,.button.paper{background:#fff;color:var(--ink);border:2px solid #e6dfd1}button.quiet,.button.quiet{background:transparent;color:var(--muted);font-weight:600}button.inline{display:inline;width:auto;padding:0;font-size:inherit;text-decoration:underline}.footnote{font-size:13px;margin-top:32px}button:disabled{opacity:.5;cursor:default}input[type=text]{width:100%;font:inherit;font-size:17px;padding:14px;border-radius:12px;border:2px solid #e6dfd1;background:#fff}.flag{width:100%;max-width:360px;aspect-ratio:10 / 7;object-fit:contain;display:block;margin:8px auto 16px;background:#fff;border-radius:12px;border:1px solid #e6dfd1}.options{display:grid;grid-template-columns:1fr;gap:10px}.options button{background:#fff;color:var(--ink);border:2px solid #e6dfd1}.options button.correct{border-color:var(--good);background:#e9f7ec}.options button.wrong{border-color:var(--bad);background:#fdecec}.clock{display:flex;justify-content:space-between;font-variant-numeric:tabular-nums;font-weight:700}.bar{height:8px;border-radius:4px;background:#e6dfd1;overflow:hidden}.bar>div{height:100%;background:var(--hue);transition:width .1s linear}.feedback{min-height:28px;font-weight:700}.feedback.good{color:var(--good)}.feedback.bad{color:var(--bad)}.headline{font-size:26px;font-weight:800;margin:8px 0}.score{display:grid;grid-template-columns:1fr 1fr;gap:10px}.score .card{text-align:center}.score .big{font-size:30px;font-weight:800}.link{word-break:break-all;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px}.inbox-item{display:flex;justify-content:space-between;align-items:center;gap:10px}.tag{font-size:11px;font-weight:800;letter-spacing:.08em;padding:3px 7px;border-radius:6px;background:var(--hue);color:#fff}.status{font-size:14px}.games{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:16px 0}button.game{background:var(--card);color:var(--ink);border:2px solid #e6dfd1;text-align:left;display:flex;flex-direction:column;gap:4px;padding:14px}.game-title{font-size:18px;font-weight:800}.stack.tight{gap:6px;margin-bottom:14px}.chips{display:flex;flex-wrap:wrap;gap:8px}button.chip{width:auto;display:inline-block;padding:8px 12px;font-size:14px;border-radius:999px;background:var(--card);color:var(--ink);border:2px solid #e6dfd1}button.chip.on{background:var(--hue);color:#fff;border-color:var(--hue)}.keypad{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:12px 0}.keypad .key{padding:14px 0;font-size:22px;background:var(--card);color:var(--ink);border:2px solid #e6dfd1}.keypad .key.enter{background:var(--hue);color:#fff;border-color:var(--hue)}.keypad .key:disabled{opacity:.5}.equation{text-align:center}.equation-prompt{font-size:34px;font-weight:800;font-variant-numeric:tabular-nums}.equation-rule{height:2px;background:#e6dfd1;margin:10px auto;width:60%}.equation-answer{font-size:34px;font-weight:800;min-height:42px;font-variant-numeric:tabular-nums}.prompt-card{text-align:center}.prompt-caption{font-size:12px;font-weight:800;letter-spacing:.08em;color:var(--muted)}.prompt-letters{font-size:44px;font-weight:800;letter-spacing:.04em;margin:6px 0}.rejection{color:var(--bad);font-weight:700;font-size:14px;min-height:20px;letter-spacing:.04em}.stage{padding:8px}.stage-canvas{display:block;width:100%}.readout{text-align:center}.readout .big{font-size:34px;font-weight:800;min-height:42px}.feedback{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.feedback button.next{width:auto;display:inline-block;margin-left:auto;padding:8px 12px;font-size:14px}.footer{text-align:center;letter-spacing:.08em;font-weight:700}