:root{--ink: #14224a;--paper: #ffffff;--sky1: #7cc6ff;--sky2: #a7e0ff;--grass: #8ce07a;--brand: #ff6b3d;--brand2: #ffd23f;--line: #dfe7f5;--a: #ff6b6b;--b: #4dabf7;--c: #51cf66;--d: #cc5de8}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{margin:0;height:100%}body{font-family:Nunito,system-ui,sans-serif;color:var(--ink);background:linear-gradient(180deg,var(--sky1),var(--sky2) 55%,var(--grass));min-height:100%}#app{min-height:100dvh;display:flex;align-items:center;justify-content:center;padding:16px}.screen{width:100%;max-width:720px;display:flex;align-items:center;justify-content:center}.card{width:100%;max-width:460px;background:var(--paper);border-radius:26px;padding:26px 24px;box-shadow:0 18px 50px #14224a38;text-align:center}.brand{font-family:"Baloo 2",cursive;font-weight:800;font-size:2.4rem;letter-spacing:.5px;color:var(--ink)}.brand b{color:var(--brand)}.brand.small{font-size:1.5rem;letter-spacing:2px;color:var(--brand)}.tag{color:#5b6b8c;font-weight:700;margin:6px 0 14px}.lbl{display:block;text-align:left;font-weight:800;font-size:.8rem;color:#7384a6;margin:12px 0 6px}.field{width:100%;padding:14px 16px;font:inherit;font-weight:700;border:2px solid var(--line);border-radius:14px;background:#f7faff;color:var(--ink)}.field:focus{outline:none;border-color:var(--b)}.theme{display:flex;gap:8px;flex-wrap:wrap}.chip{padding:10px 16px;border-radius:999px;border:2px solid var(--line);background:#f3f7ff;font:inherit;font-weight:800;cursor:pointer}.chip.on{background:var(--brand2);border-color:var(--brand2)}.btn{font:inherit;font-family:"Baloo 2",cursive;font-weight:800;font-size:1.05rem;padding:13px 20px;border-radius:16px;border:none;cursor:pointer;background:var(--brand);color:#fff;box-shadow:0 5px #d8512a;transition:transform .05s,box-shadow .05s}.btn:active{transform:translateY(3px);box-shadow:0 2px #d8512a}.btn.big{width:100%;margin-top:16px;font-size:1.2rem;padding:16px}.btn.ghost{background:#eef3fb;color:var(--ink);box-shadow:0 5px #cfd9ec}.btn.ghost:active{box-shadow:0 2px #cfd9ec}.or{margin:16px 0 10px;color:#93a1bd;font-weight:700;font-size:.85rem}.row{display:flex;gap:10px}.row.center{justify-content:center;margin-top:18px}.row .field{flex:1}.foot{margin-top:16px;color:#9aa7c2;font-weight:700;font-size:.8rem}.code{font-family:"Baloo 2",cursive;font-weight:800;font-size:2.2rem;letter-spacing:8px;color:var(--brand);background:#fff5ef;border-radius:16px;padding:10px;margin:6px 0 14px}.players{display:flex;flex-direction:column;gap:8px;margin:10px 0}.player{display:flex;align-items:center;gap:10px;background:#f6f9ff;border-radius:14px;padding:10px 14px;font-weight:800;text-align:left}.player .host{margin-left:auto;color:var(--brand);font-size:.85rem}.pa{font-size:1.3rem}.modes{display:flex;gap:8px;margin-bottom:6px}.mode-opt{flex:1;display:flex;flex-direction:column;gap:2px;align-items:center;padding:10px 8px;border-radius:14px;border:2px solid var(--line);background:#f3f7ff;font:inherit;color:var(--ink);cursor:pointer}.mode-opt b{font-weight:800}.mode-opt small{color:#7384a6;font-size:.72rem}.mode-opt.on{background:var(--brand2);border-color:var(--brand2)}.mode-opt.on small{color:#7a5a12}.mode-opt:disabled{cursor:default;opacity:.8}.match{position:fixed;inset:0;width:100%;height:100dvh;display:flex;flex-direction:column;gap:10px;padding:10px;overflow:hidden}.board-host{flex:0 0 46dvh;min-height:0;border-radius:22px;overflow:hidden;box-shadow:0 14px 36px #14224a38;background:#bfe3ff}.board-host canvas{display:block;width:100%;height:100%}.controls{flex:0 1 auto;width:100%;max-width:640px;margin:0 auto;max-height:calc(54dvh - 30px);overflow-y:auto;background:#fff;border-radius:22px;padding:16px;box-shadow:0 14px 36px #14224a2e;text-align:center}.q-head{color:var(--ink);font-weight:800;text-align:center;margin-bottom:8px}.timer{height:12px;background:#ffffff8c;border-radius:999px;overflow:hidden;margin-bottom:16px}.timer-fill{height:100%;width:100%;background:linear-gradient(90deg,var(--brand2),var(--brand));border-radius:999px}.q-prompt{background:#f6f9ff;border-radius:16px;padding:16px 18px;font-family:"Baloo 2",cursive;font-weight:700;font-size:1.4rem;text-align:center}.choices{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:16px 0}.choice{font:inherit;font-weight:800;font-size:1.1rem;color:#fff;border:none;cursor:pointer;padding:20px 16px;border-radius:18px;min-height:72px;transition:transform .05s,filter .1s}.choice.c-a{background:var(--a)}.choice.c-b{background:var(--b)}.choice.c-c{background:var(--c)}.choice.c-d{background:var(--d)}.choice:active{transform:scale(.97)}.choice:disabled{cursor:default;opacity:.85}.choice.picked{outline:4px solid #fff}.choice.correct{filter:none;box-shadow:0 0 0 5px #2f9e44 inset;opacity:1}.choice.wrong{filter:grayscale(.5) brightness(.9);box-shadow:0 0 0 5px #e03131 inset}.explain{min-height:1.4em;margin-top:12px;padding:12px 16px;border-radius:14px;border:2px solid transparent;background:transparent;font-weight:700;text-align:center;transition:background .2s ease,border-color .2s ease}.explain.show{background:#fffbe7;border-color:var(--brand2)}@media(max-width:480px){.choices{grid-template-columns:1fr}.q-prompt{font-size:1.25rem}}.board{margin-top:16px}.track{display:flex;flex-direction:column;gap:8px;background:#ffffffa6;border-radius:16px;padding:12px}.lane{display:grid;grid-template-columns:90px 1fr 52px;align-items:center;gap:8px}.lane.me .lane-name{color:var(--brand)}.lane-name{font-weight:800;font-size:.8rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.lane-rail{position:relative;height:26px;background:#eaf1ff;border-radius:999px}.lane-rail .avatar{position:absolute;top:50%;transform:translate(-50%,-50%);transition:left .5s cubic-bezier(.34,1.56,.64,1);font-size:1.25rem}.lane-rail .flag{position:absolute;right:4px;top:50%;transform:translateY(-50%);opacity:.6}.lane-pos{font-weight:800;font-size:.8rem;text-align:right;color:#5b6b8c}.ranking{display:flex;flex-direction:column;gap:8px;margin:14px 0 18px}.rank-row{display:flex;align-items:center;gap:10px;background:#f6f9ff;border-radius:14px;padding:10px 14px;font-weight:800}.rank-row.me{background:#fff5ef;outline:2px solid var(--brand2)}.rank-row .grow{flex:1;text-align:left}.muted{color:#93a1bd}.toast{position:fixed;top:18px;left:50%;transform:translate(-50%);background:var(--ink);color:#fff;font-weight:800;padding:10px 18px;border-radius:999px;box-shadow:0 8px 24px #14224a4d;z-index:50}