:root{--bg: #0e1016;--panel: #181a25;--line: #2a2d3d;--ink: #eef1f7;--dim: #969db3;--accent: #7a5ad0;--accent-ink: #f4efff;--good: #3ecf8e;--bad: #e0556a;--add: #4ec9b0;--sub: #e0a23c;--mul: #6aa0ff;--div: #d06aae}*{box-sizing:border-box}html,body{margin:0;height:100%}body{background:radial-gradient(900px 560px at 50% -8%,#1a1730,var(--bg));color:var(--ink);font-family:system-ui,-apple-system,Segoe UI,sans-serif;display:flex;justify-content:center;-webkit-user-select:none;user-select:none}#app{width:100%;max-width:560px;padding:12px 12px 26px}header{text-align:center;margin-bottom:6px}h1{margin:0;font-size:28px;letter-spacing:5px;font-weight:800;color:var(--accent)}.sub{margin:4px 0 0;color:var(--dim);font-size:13px}.bar{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;align-items:center;margin:10px 0}.seg{display:inline-flex;background:var(--panel);border:1px solid var(--line);border-radius:999px;overflow:hidden}.seg button{background:none;border:none;color:var(--dim);padding:6px 13px;font:600 13px system-ui;cursor:pointer}.seg button.active{background:var(--accent);color:var(--accent-ink)}.btn{background:var(--panel);border:1px solid var(--line);color:var(--ink);padding:7px 14px;border-radius:999px;font:700 13px system-ui;cursor:pointer}.btn:hover{border-color:var(--accent)}.btn.primary{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}.scoreboard{display:flex;gap:10px;justify-content:center;margin:8px 0}.readout{background:#0a0c12;border:1px solid var(--line);border-radius:8px;padding:5px 14px;font:800 18px ui-monospace,monospace;color:var(--accent);min-width:92px;text-align:center}.readout span{color:var(--dim);font-size:11px;display:block;font-weight:600;letter-spacing:.5px}.enemy{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:12px 14px;margin:8px 0}.enemyrow{display:flex;justify-content:space-between;align-items:baseline}.enemyname{font-weight:800;font-size:16px}.enemyatk{color:var(--bad);font-weight:700;font-size:14px}.hpbar{position:relative;height:18px;background:#0a0c12;border:1px solid var(--line);border-radius:999px;margin:8px 0 6px;overflow:hidden}.hpfill{position:absolute;inset:0 auto 0 0;width:100%;background:linear-gradient(90deg,#c1394e,#e0556a);transition:width .25s ease}.hpbar span{position:relative;display:block;text-align:center;font:700 12px ui-monospace,monospace;line-height:18px;color:#fff}.weakhint{color:var(--dim);font-size:12px;font-style:italic}.challenge{background:#0a0c12;border:1px solid var(--accent);border-radius:12px;padding:14px;margin:8px 0}.qrow{display:flex;flex-direction:column;gap:4px;margin-bottom:10px}.qop{color:var(--dim);font-size:12px;font-weight:600}.qtext{font:800 26px ui-monospace,monospace;color:var(--ink);letter-spacing:1px}.arow{display:flex;gap:8px;align-items:center}.arow input{flex:1;background:var(--panel);border:1px solid var(--line);color:var(--ink);border-radius:8px;padding:10px 12px;font:800 20px ui-monospace,monospace}.arow input:focus{outline:none;border-color:var(--accent)}.feedback{margin-top:8px;font-size:13px;font-weight:600;min-height:18px}.feedback.good{color:var(--good)}.feedback.bad{color:var(--bad)}.hand{display:grid;grid-template-columns:repeat(auto-fit,minmax(96px,1fr));gap:8px;margin:10px 0}.gcard{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:12px 8px;cursor:pointer;text-align:center;color:var(--ink);transition:transform .1s ease,border-color .1s ease}.gcard:hover{transform:translateY(-2px)}.gcard.active{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent) inset}.gcard-op{font:800 28px ui-monospace,monospace}.gcard.op-add .gcard-op{color:var(--add)}.gcard.op-sub .gcard-op{color:var(--sub)}.gcard.op-mul .gcard-op{color:var(--mul)}.gcard.op-div .gcard-op{color:var(--div)}.gcard-name{font-size:12px;font-weight:700;margin-top:2px}.gcard-pow{font-size:11px;color:var(--dim);margin-top:2px}.drawinfo{color:var(--dim);font-size:12px;font-family:ui-monospace,monospace}.overlay{position:fixed;inset:0;background:#08090ed1;display:flex;align-items:center;justify-content:center;padding:16px}.overlay.hidden,.challenge.hidden{display:none}.overlay .card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:22px 24px;max-width:380px;text-align:center}.overlay h2{margin:0 0 8px;color:var(--accent)}.overlay p{color:var(--ink);font-size:14px;line-height:1.6;margin:0 0 14px}.opsummary{display:inline-block;margin-top:6px;color:var(--dim);font:700 13px ui-monospace,monospace}