:root{--bg: #101119;--panel: #1b1d28;--accent: #b05f8a;--text: #e7e6ef;--muted: #9a9ab0}*{box-sizing:border-box}html,body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,sans-serif}#app{max-width:720px;margin:0 auto;padding:16px}header h1{margin:0;letter-spacing:3px;font-size:26px;color:var(--accent)}header .sub{margin:6px 0 12px;color:var(--muted);font-size:13px;max-width:60ch}.bar{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-bottom:10px}.seg{display:inline-flex;border:1px solid #33354a;border-radius:8px;overflow:hidden}.seg button{background:transparent;color:var(--muted);border:none;padding:6px 12px;cursor:pointer;font-size:13px}.seg button.active{background:var(--accent);color:#1a1020;font-weight:600}.btn{background:#2a2c3c;color:var(--text);border:1px solid #3a3c52;border-radius:8px;padding:6px 12px;cursor:pointer;font-size:13px}.btn:hover{background:#353750}.status{color:var(--muted);font-size:13px;margin:6px 0;min-height:18px}.stage{position:relative;display:flex;justify-content:center}canvas{background:#171821;border:1px solid #2c2e3d;border-radius:10px;max-width:100%;touch-action:manipulation}.panel{background:var(--panel);border:1px solid #2c2e3d;border-radius:10px;padding:10px 12px;margin-top:10px;min-height:40px}.prompt{font-size:14px;margin-bottom:8px}.choices{display:flex;flex-wrap:wrap;gap:6px}.choice{background:#262838;color:var(--text);border:1px solid #3a3c52;border-radius:8px;padding:6px 10px;cursor:pointer;font-size:13px}.choice:hover{background:#34374d}.choice.wrong{background:#5a2422;border-color:#c0413c}.freetext{display:flex;gap:6px;margin-top:10px}.freetext input{flex:1;background:#14151e;color:var(--text);border:1px solid #3a3c52;border-radius:8px;padding:6px 10px;font-size:13px}.slice{background:#20141d;border:1px solid #4a2a3e;border-radius:10px;padding:10px 12px;margin-top:10px}.slice-title{color:var(--accent);font-weight:600;font-size:14px;margin-bottom:6px}.slice-cs{font-size:13px;color:var(--text);margin-bottom:8px}.hint{color:var(--muted);font-size:12px;margin-top:10px}.hidden{display:none!important}.overlay{position:fixed;inset:0;background:#08080ebf;display:flex;align-items:center;justify-content:center}.overlay .card{background:var(--panel);border:1px solid var(--accent);border-radius:14px;padding:24px 28px;text-align:center}.overlay h2{color:var(--accent);margin:0 0 10px}.overlay p{margin:4px 0;color:var(--text)}.overlay .btn{margin-top:14px}