.kt-tabs{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:20px}.kt-tabs button{padding:13px 19px}.kt-tabs [aria-pressed=true]{background:#507f91;color:white;border-color:#507f91}.kt-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:20px}.kt-stats>div{background:#edf5f5;border:1px solid #d8e7e7;border-radius:18px;padding:20px}.kt-stats b{display:block;font-size:30px;color:#37677a;font-variant-numeric:tabular-nums}.kt-stats span{font-size:13px;color:#526c77}.kt-work{padding:24px}.kt-reference{font:19px/1.9 Georgia,serif;background:#faf8f3;border:1px solid #e7e1d7;border-radius:14px;padding:22px;margin:16px 0;max-height:270px;overflow:auto;white-space:pre-wrap;overflow-wrap:anywhere}.kt-correct{color:#236d4e;background:#e0f0e7}.kt-wrong{background:#f9cdd1;color:#982a40;text-decoration:underline;text-decoration-style:wavy}.kt-next{border-bottom:3px solid #507f91}.kt-input-label{display:block;font-weight:600;margin:15px 0 8px}#kt-input{width:100%;resize:vertical;font:18px/1.6 Consolas,monospace;padding:16px;border:2px solid #d9d5e0;border-radius:12px;box-sizing:border-box}#kt-input:focus{outline:3px solid #d7e9ee;border-color:#507f91}.kt-target{text-align:center;padding:25px;background:#edf5f5;border-radius:16px;margin:20px 0}.kt-target strong{display:block;font:700 76px/1.4 Consolas,monospace;letter-spacing:12px;color:#37677a}.kt-target span{display:block;color:#526c77}.kt-result{background:#e8f2dc;padding:20px;border-radius:14px;line-height:1.8;font-weight:600;margin-top:16px}.kt-work [hidden],.kt-target[hidden]{display:none!important}@media(max-width:650px){.kt-stats{grid-template-columns:1fr 1fr}.kt-stats>div{padding:14px}.kt-work{padding:16px}.kt-target strong{font-size:58px}.kt-tabs button{flex:1}}