:root{color-scheme:light;--ink:#17231d;--lime:#ecff61;--paper:#f2f1e9;--orange:#ff785e}*{box-sizing:border-box}body{margin:0;background:var(--lime);color:var(--ink);font-family:Inter,system-ui,sans-serif}button{font:inherit;cursor:pointer}.game{max-width:1000px;min-height:100svh;margin:auto;padding:22px 26px;display:grid;grid-template-columns:.8fr 1.2fr;grid-template-rows:auto 1fr;gap:28px 55px}header{grid-column:1/-1;display:flex;justify-content:space-between;border-bottom:1px solid #17231d55;padding-bottom:12px;font:.68rem ui-monospace;letter-spacing:.1em}header a{color:inherit;font-weight:900;text-decoration:none}.hero{align-self:center}.eyebrow{font-size:.65rem;font-weight:900;letter-spacing:.13em;text-transform:uppercase}h1{font-size:clamp(3.4rem,8vw,6rem);line-height:.85;letter-spacing:-.09em;margin:12px 0}h1 em{display:block;font:italic 1em Georgia;color:#d83f32}.hero>p:last-child{line-height:1.6}.arena{align-self:center;background:var(--ink);color:var(--paper);border-radius:24px;padding:24px;box-shadow:8px 9px 0 #d83f32}.hud{display:flex;justify-content:space-between;font-size:.58rem;color:#aebbb4}.hud strong{display:block;color:white;font:900 1.15rem ui-monospace}.meter{height:4px;background:#ffffff18;margin:18px -24px}.meter i{display:block;width:100%;height:100%;background:var(--orange)}.equation{display:flex;align-items:center;justify-content:center;gap:18px;padding:45px 0;font:900 clamp(2.1rem,6vw,4rem) ui-monospace}.equation b{display:grid;place-content:center;width:1.2em;aspect-ratio:1;border:2px dashed var(--lime);border-radius:10px;color:var(--lime)}.choices{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:9px}.choices button{border:1px solid var(--lime);border-radius:12px;padding:16px 5px;background:transparent;color:var(--lime);font-size:1.7rem;font-weight:900}.choices button:hover:not(:disabled){background:var(--lime);color:var(--ink)}.arena p{min-height:2.7em;color:#b9c5bf;font-size:.78rem;line-height:1.5}.arena>button{width:100%;border:0;border-radius:999px;padding:14px;background:var(--orange);color:var(--ink);font-weight:900}@media(max-width:700px){.game{padding:15px 14px;display:flex;gap:16px}.hero,.arena{min-width:0;width:100%}header span{display:none}h1{font-size:3.6rem}.hero>p:last-child{font-size:.8rem}.arena{padding:18px;box-shadow:4px 5px 0}.meter{margin:14px -18px}.equation{padding:38px 0;gap:7px;font-size:2rem}.hud{gap:7px;flex-wrap:wrap}.choices button{padding:12px}}