:root{--text:#1c2530;--text-muted:#5a6472;--bg:#f4f6f8;--panel-bg:#fff;--border:#d7dce2;--accent:#1c2b3a;--accent-contrast:#fff;--correct:#1f7a3d;--correct-bg:#e4f5e9;--incorrect:#a3272c;--incorrect-bg:#fbe7e7;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;font:16px/1.5 system-ui,Segoe UI,Roboto,sans-serif}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial;--text:#e7ebf0;--text-muted:#a3adb8;--bg:#12161c;--panel-bg:#1b212a;--border:#2c3542;--accent:#5b9bd5;--accent-contrast:#0c1116;--correct:#5fd489;--correct-bg:#123021;--incorrect:#ef7b7b;--incorrect-bg:#3a1717}}*{box-sizing:border-box}body{min-height:100svh;margin:0}#root{flex-direction:column;min-height:100svh;display:flex}.app{flex-direction:column;flex:1;width:100%;max-width:720px;margin:0 auto;padding:16px;display:flex}h1{margin:8px 0;font-size:1.8rem}h3{color:var(--text-muted);margin:0 0 8px;font-size:1rem}p{margin:0 0 8px}.screen{flex-direction:column;gap:14px;display:flex}.start-screen{text-align:center;flex:1;justify-content:center}.tagline{color:var(--text-muted);max-width:46ch;margin-inline:auto}.high-score{font-weight:600}.mode-choice{flex-direction:column;gap:4px;margin-top:16px;display:flex}.mode-desc{color:var(--text-muted);margin-bottom:16px;font-size:.85rem}button{font:inherit;cursor:pointer}button.primary{background:var(--accent);color:var(--accent-contrast);border:none;border-radius:8px;padding:12px 18px;font-weight:600}button.secondary{color:var(--text);border:1px solid var(--border);background:0 0;border-radius:8px;padding:12px 18px}.round-header{justify-content:space-between;align-items:center;font-weight:600;display:flex}.mode-pill{color:var(--text-muted);border:1px solid var(--border);border-radius:999px;padding:2px 10px;font-size:.75rem;font-weight:500}.question-panel{background:var(--panel-bg);border:1px solid var(--border);border-radius:10px;flex-direction:column;gap:10px;padding:16px;display:flex}.prompt{font-size:1.05rem;font-weight:600}.options{flex-direction:column;gap:8px;display:flex}.option{text-align:left;background:var(--bg);border:1px solid var(--border);color:var(--text);border-radius:8px;padding:10px 12px}.option:not(:disabled):hover{border-color:var(--accent)}.option:disabled{cursor:default}.option.selected{border-color:var(--accent);border-width:2px}.option.correct{background:var(--correct-bg);border-color:var(--correct);color:var(--correct);font-weight:600}.option.incorrect{background:var(--incorrect-bg);border-color:var(--incorrect);color:var(--incorrect)}.option.static{cursor:default}.feedback{border-top:1px solid var(--border);flex-direction:column;gap:8px;padding-top:10px;display:flex}.correct-banner{color:var(--correct);font-weight:700}.incorrect-banner{color:var(--incorrect);font-weight:700}.explanation{color:var(--text-muted)}.fact-log{background:var(--panel-bg);border:1px solid var(--border);border-radius:10px;flex-direction:column;gap:10px;padding:16px;display:flex}.fact-log h3{margin:0}.fact-log-round summary{cursor:pointer;color:var(--text-muted);font-weight:600}.fact-log-round-label{color:var(--text-muted);margin:0;font-weight:600}.fact-log-round ul{flex-direction:column;gap:6px;margin:6px 0 0;padding-left:20px;display:flex}.fact-log-round li{color:var(--text-muted);font-size:.9rem}.fact-log-round-empty{color:var(--text-muted);margin:0;font-size:.9rem}.game-over-screen h1{text-align:center}.score-line{text-align:center;font-size:1.1rem}.high-score-banner{text-align:center;color:var(--correct);font-weight:700}.actions{justify-content:center;gap:10px;padding-top:8px;display:flex}@media (width>=640px){.app{padding:32px 16px}.mode-choice{flex-flow:wrap;justify-content:center;align-items:flex-start}.mode-choice button,.mode-choice p{flex-basis:45%}}