:root{font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#e9ede8;background:#141715;font-synthesis:none;font-size:16px;color-scheme:dark;--muted:#a2aaa2;--lime:#d5fa66;--line:#343a34}*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:default;opacity:.4}button,a,input,textarea,select{touch-action:manipulation}button:focus-visible,a:focus-visible{outline:2px solid var(--lime);outline-offset:5px}button{color:inherit} .shell{max-width:1000px;margin:auto;padding:0 44px}header{height:110px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:12px;color:inherit;text-decoration:none;font-size:36px;font-weight:750;letter-spacing:-2px}.mark{color:var(--lime);font-size:29px;letter-spacing:0}.brand-note{font-size:11px;letter-spacing:2px;color:var(--muted);font-weight:550;border-left:1px solid var(--line);padding-left:18px;margin-left:10px}.icon-button{border:1px solid var(--line);border-radius:50%;background:none;width:40px;height:40px;font-size:23px}nav{display:flex;gap:34px;border-bottom:1px solid var(--line)}nav button{border:0;background:none;padding:15px 0 19px;color:var(--muted);font-size:14px}nav button.active{border-bottom:2px solid var(--lime);color:var(--lime)}main{min-height:620px}.practice-top{display:flex;justify-content:space-between;align-items:center;margin:34px 0 28px;gap:16px}.eyebrow{color:var(--muted);font-size:12px;font-weight:650;letter-spacing:1.7px;text-transform:uppercase}.level-title{font-size:18px;margin-top:8px;font-weight:550}.pill{border:1px solid var(--line);border-radius:22px;background:none;padding:9px 13px;color:var(--muted);font-size:12px;white-space:nowrap}.pill strong{color:var(--lime);font-weight:500}.exercise{text-align:center;padding:28px 12px 30px}.mode-tag{color:var(--lime);font-size:12px;letter-spacing:1.7px;text-transform:uppercase}h1{font-size:40px;font-weight:520;letter-spacing:-1.6px;margin:15px 0 12px}p{color:var(--muted);line-height:1.65;margin:0 0 20px}.signal{height:52px;display:flex;align-items:center;justify-content:center;gap:5px;margin:23px 0}.signal i{width:3px;height:8px;background:#69775a;border-radius:5px}.signal i:nth-child(3n){height:24px}.signal i:nth-child(4n){height:38px}.signal.playing i{background:var(--lime);animation:pulse .55s ease-in-out infinite alternate}.signal i:nth-child(2n){animation-delay:.17s}@keyframes pulse{to{transform:scaleY(.3)}}.entry{display:flex;justify-content:center;gap:8px;min-height:70px;flex-wrap:wrap}.tile{width:60px;height:66px;border:1px solid #4a5348;border-radius:7px;display:grid;place-items:center;font-size:30px;font-weight:600;background:#1b201b}.tile.cursor{border-color:var(--lime);box-shadow:0 0 0 1px var(--lime)}.tile.correct{border-color:var(--lime);color:var(--lime);background:#242e1d}.tile.wrong{border-color:#e69c8b;color:#f1b1a1}.answer-label{display:block}.copy-input{position:absolute;opacity:0;width:1px;height:1px;pointer-events:none}.feedback{min-height:48px;padding-top:15px;font-size:14px;color:var(--muted)}.primary{background:var(--lime);color:#1a2012;border:0;border-radius:7px;padding:15px 26px;font-weight:650;min-width:185px}.secondary{background:none;border:1px solid var(--line);border-radius:7px;padding:13px 19px}.actions{display:flex;gap:12px;justify-content:center;align-items:center}.shortcut{margin-top:17px;font-size:12px;color:#858e85}kbd{border:1px solid #414841;padding:2px 5px;border-radius:3px;font-family:inherit;font-size:11px}.metrics{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-top:25px;padding:22px 0}.metric{text-align:center;border-right:1px solid var(--line)}.metric:last-child{border:0}.metric b{font-size:25px;font-weight:500;display:block;margin-bottom:7px}.metric span{font-size:11px;letter-spacing:1.4px;color:var(--muted);text-transform:uppercase}.bottom-note{display:flex;justify-content:space-between;margin:20px 0;font-size:12px;color:var(--muted);gap:12px}.text-button{background:none;border:0;padding:0;color:var(--muted);text-decoration:underline;text-underline-offset:4px}.keyboard{margin:25px auto 0;max-width:620px}.key-row{display:flex;justify-content:center;gap:5px;margin-bottom:6px}.key{flex:1;max-width:49px;min-width:0;height:43px;border:0;background:#303630;border-radius:5px;font-size:14px}.key.wide{max-width:78px;flex:1.6;font-size:11px}.page-head{display:flex;justify-content:space-between;align-items:center;gap:16px;margin:36px 0 25px}.page-head h1{font-size:30px;margin:0}.level-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.level-card{text-align:left;background:#1c211c;border:1px solid var(--line);border-radius:9px;padding:20px;display:flex;align-items:center;gap:18px}.level-card.selected{border-color:var(--lime)}.level-number{color:var(--lime);font-size:20px;width:30px}.level-card h3{font-size:16px;margin:0 0 7px}.level-card p{font-size:12px;margin:0}.level-card .status{margin-left:auto;color:var(--lime)}.section-note{font-size:14px;margin-bottom:25px}.custom-form{max-width:600px;margin:30px auto}.field{display:block;margin:20px 0}.field>span,dialog label{display:block;color:#d8dfd5;font-size:14px;margin-bottom:10px}input[type=text],textarea,select{width:100%;background:#1d231d;border:1px solid #4a5348;color:inherit;border-radius:6px;padding:13px}textarea{min-height:100px;resize:vertical}.small{font-size:13px}footer{display:flex;justify-content:space-between;gap:14px;padding:28px 0 30px;color:#858e85;font-size:11px;border-top:1px solid var(--line);margin-top:25px}dialog{width:min(470px,calc(100% - 30px));border:1px solid #424b3f;border-radius:14px;padding:28px;background:#1b211b}dialog::backdrop{background:#0009;backdrop-filter:blur(5px)}.dialog-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}h2{font-size:23px;font-weight:550;margin:0}.dialog-head .icon-button{border:0}dialog label{margin-top:24px;display:flex;justify-content:space-between}output{color:var(--lime)}input[type=range]{width:100%;accent-color:var(--lime);margin-bottom:12px}.full{width:100%;margin-top:16px}.history{width:100%;border-collapse:collapse;margin:25px 0;font-size:14px}.history td,.history th{padding:15px 8px;text-align:left;border-bottom:1px solid var(--line)}.history th{color:var(--muted);font-weight:400;font-size:12px}.error{color:#f1b1a1}.success{color:var(--lime)}.summary{padding:40px 0;text-align:center}.summary .metrics{margin:30px 0}.summary h1{font-size:36px}.progress-line{display:flex;gap:5px;margin-top:20px}.progress-line i{height:3px;background:#374034;flex:1}.progress-line i.done{background:var(--lime)}@media(max-width:600px){.shell{padding:0 20px}header{height:83px}.brand{font-size:31px}.brand-note{font-size:10px;margin-left:2px;padding-left:12px}nav{gap:29px}main{min-height:0}.practice-top{margin:24px 0 15px}.level-title{font-size:16px}.pill{font-size:11px;padding:8px 10px}.exercise{padding:22px 0 10px}h1{font-size:32px}.exercise p{font-size:14px}.signal{margin:18px 0}.tile{width:45px;height:54px;font-size:25px}.entry{gap:6px;min-height:56px}.metrics{margin-top:20px;padding:19px 0}.metric b{font-size:23px}.metric span{font-size:10px}.shortcut{display:none}.bottom-note{font-size:11px}.keyboard{margin-top:20px}.key{height:44px;font-size:13px}.key-row{gap:4px}.level-grid{grid-template-columns:1fr}.page-head h1{font-size:27px}.page-head .secondary{font-size:13px;padding:11px}footer{font-size:10px;flex-direction:column;gap:8px;margin-top:24px;padding:23px 0}.history{font-size:12px}.history td,.history th{padding:13px 4px}}@media(prefers-reduced-motion:reduce){.signal.playing i{animation:none}}
@media(max-width:600px){.training .practice-top{margin:18px 0 8px}.training .exercise{padding:12px 0 0}.training h1{font-size:25px;margin:10px 0 8px}.training .exercise p{margin-bottom:8px;font-size:13px}.training .signal{height:30px;margin:12px 0}.training .signal i:nth-child(4n){height:28px}.training .feedback{min-height:41px;font-size:13px;padding-top:11px}.training .metrics{padding:12px 0;margin-top:16px}.training .metric b{font-size:21px;margin-bottom:4px}.training .progress-line{margin-top:12px}.training .bottom-note{margin:12px 0}.training .keyboard{margin-top:12px}.training .key{height:40px}}
.sound-grid{display:flex;flex-wrap:wrap;justify-content:center;gap:14px;margin:30px auto;max-width:600px}.sound-card{min-width:110px;min-height:140px;padding:22px;background:#1c211c;border:1px solid #4a5348;border-radius:10px}.sound-card:hover,.sound-card:focus-visible{border-color:var(--lime)}.sound-card strong{display:block;color:var(--lime);font-size:48px;font-weight:550;margin-bottom:15px}.sound-card span{font-size:14px;color:var(--muted)}.review-sounds{text-align:center;margin:22px 0;font-size:14px}.intro .feedback{margin-bottom:16px}@media(max-width:600px){.sound-grid{gap:10px;margin:24px auto}.sound-card{min-width:94px;min-height:120px;padding:18px}.sound-card strong{font-size:38px}}