:root{--bg: #0d1620;--panel: #14222f;--ink: #e6f0f7;--muted: #7c93a5;--accent: #4a8cc0;--cool: #2a5a82;--warm: #b87a2a;--hot: #c0432a;--mastered: #2f8f6a;--line: #223444}*{box-sizing:border-box}html,body{margin:0;background:var(--bg);color:var(--ink);font-family:Segoe UI,system-ui,-apple-system,sans-serif;-webkit-text-size-adjust:100%}#app{max-width:880px;margin:0 auto;padding:18px 16px 40px}header h1{margin:0;font-size:1.5rem;letter-spacing:.12em;color:var(--accent)}header .sub{margin:4px 0 14px;color:var(--muted);font-size:.9rem}.bar{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:14px}.seg{display:inline-flex;border:1px solid var(--line);border-radius:8px;overflow:hidden}.seg button{background:var(--panel);color:var(--muted);border:none;padding:8px 14px;cursor:pointer;font-size:.85rem}.seg button.active{background:var(--accent);color:#fff}.btn{background:var(--panel);color:var(--ink);border:1px solid var(--line);border-radius:8px;padding:8px 14px;cursor:pointer;font-size:.85rem}.btn:hover{border-color:var(--accent)}.scoreboard{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:16px}.readout{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:10px;text-align:center;font-size:1.3rem;font-weight:700}.readout span{display:block;font-size:.62rem;letter-spacing:.14em;color:var(--muted);font-weight:600;margin-bottom:4px}.stage{margin-bottom:18px}.target{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:22px 18px;font-family:Cascadia Code,Consolas,monospace;font-size:1.5rem;line-height:2;word-break:break-all;letter-spacing:.06em}.target .ch{color:var(--muted)}.target .ch.done{color:var(--mastered)}.target .ch.cur{color:#fff;background:var(--accent);border-radius:4px;padding:0 2px}.keyboard{display:flex;flex-direction:column;align-items:center;gap:8px;margin-bottom:16px}.kbrow{display:flex;gap:8px}.key{width:44px;height:44px;display:grid;place-items:center;border-radius:8px;font-family:monospace;font-size:1.05rem;font-weight:700;text-transform:uppercase;border:1px solid var(--line);background:var(--panel);transition:background .2s,border-color .2s}.key.cool{background:var(--cool)}.key.warm{background:var(--warm)}.key.hot{background:var(--hot)}.key.mastered{background:var(--mastered);border-color:#4cd6a0}.hint{text-align:center;color:var(--muted);font-size:.85rem}.overlay{position:fixed;inset:0;background:#060c12db;display:grid;place-items:center;z-index:50}.overlay.hidden{display:none}.card{background:var(--panel);border:1px solid var(--accent);border-radius:14px;padding:28px 32px;text-align:center;max-width:420px}.card h2{margin:0 0 6px;color:var(--accent);letter-spacing:.1em}.finalstats{display:flex;justify-content:center;gap:24px;margin:18px 0}.finalstats b{font-size:1.7rem;display:block}.finalstats span{font-size:.62rem;letter-spacing:.12em;color:var(--muted)}@media(max-width:520px){.scoreboard{grid-template-columns:repeat(2,1fr)}.key{width:34px;height:34px;font-size:.9rem}.target{font-size:1.2rem}}