:root{--bg: #0f1410;--panel: #182019;--line: #2a352c;--ink: #eef5ef;--dim: #98ad9e;--accent: #5a9c6a;--accent2: #7fc78d;--good: #2f6b3e;--warn: #5a4a1f}*{box-sizing:border-box}html,body{margin:0;height:100%}body{background:radial-gradient(900px 560px at 50% -8%,#16221a,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:14px 14px 30px}header{text-align:center;margin-bottom:6px}h1{margin:0;font-size:32px;letter-spacing:8px;font-weight:800;color:var(--accent2)}.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:12px 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:7px 15px;font:600 13px system-ui;cursor:pointer}.seg button.active{background:var(--accent);color:#06140a}.btn{background:var(--panel);border:1px solid var(--line);color:var(--ink);padding:8px 16px;border-radius:999px;font:700 13px system-ui;cursor:pointer}.btn:hover{border-color:var(--accent)}.btn.primary{background:var(--accent);color:#06140a;border-color:var(--accent)}.btn:disabled{opacity:.5;cursor:default}.scoreboard{display:flex;gap:10px;justify-content:center;margin:10px 0}.readout{background:#0a120c;border:1px solid var(--line);border-radius:8px;padding:6px 16px;font:800 18px ui-monospace,monospace;color:var(--accent2);min-width:84px;text-align:center}.readout span{color:var(--dim);font-size:11px;display:block;font-weight:600;letter-spacing:.5px}.card{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:16px;margin:12px 0}.card h2{margin:0 0 6px;font-size:14px;color:var(--accent2);letter-spacing:1px;text-transform:uppercase}.prompt{font-size:19px;line-height:1.4;margin:6px 0 10px}.encourage{color:var(--dim);font-size:13px;font-style:italic;margin:4px 0 12px}.answer-row{display:flex;gap:8px}.answer-row input{flex:1;background:#0a120c;border:1px solid var(--line);color:var(--ink);border-radius:8px;padding:10px 12px;font:600 16px system-ui}.answer-row input:focus{outline:none;border-color:var(--accent)}.feedback{margin:10px 0 0;font-size:14px;min-height:20px;font-weight:600}.feedback.correct{color:var(--accent2)}.feedback.wrong{color:#d9b25a}.meter-wrap{margin:10px 0}.meter-label{display:flex;justify-content:space-between;font-size:12px;color:var(--dim);margin-bottom:4px}.meter{height:14px;background:#0a120c;border:1px solid var(--line);border-radius:999px;overflow:hidden}.meter-fill{height:100%;width:0%;background:linear-gradient(90deg,var(--accent),var(--accent2));transition:width .35s ease}.brain-pop{color:var(--accent2);font-weight:800}.hints{margin:12px 0 0}.hint{background:#0a120c;border-left:3px solid var(--accent);padding:8px 12px;margin:6px 0;border-radius:0 6px 6px 0;font-size:14px;color:var(--ink);animation:slidein .3s ease}.hint .tag{color:var(--accent2);font-weight:700;font-size:11px;display:block}.hint-locked{color:var(--dim);font-size:12px;font-style:italic;margin-top:8px}@keyframes slidein{0%{opacity:0;transform:translate(-8px)}to{opacity:1;transform:none}}.fixed-statement{font-size:18px;line-height:1.4;margin:4px 0 14px;padding:10px 14px;background:#1d1612;border:1px dashed #4a3a26;border-radius:8px;color:#e7cf9a}.choices{display:flex;flex-direction:column;gap:8px}.choice{text-align:left;background:#0a120c;border:1px solid var(--line);color:var(--ink);border-radius:8px;padding:11px 14px;font:600 15px system-ui;cursor:pointer;line-height:1.35}.choice:hover{border-color:var(--accent)}.choice.right{background:var(--good);border-color:var(--accent2)}.choice.wrong{background:#4a2a2a;border-color:#7a4a4a}.choice:disabled{cursor:default}.note{color:var(--dim);font-size:12.5px;line-height:1.5;margin:10px 0 0}.done{text-align:center;padding:20px}.done .big{font-size:26px;color:var(--accent2);font-weight:800;margin-bottom:6px}