.piano-center{display:grid;gap:16px}
.piano-tabs{display:flex;gap:7px;overflow:auto;padding:2px 0 4px}
.piano-tab{border:1px solid var(--line);background:#0d1116;color:var(--muted);border-radius:11px;padding:9px 12px;font-size:11px;font-weight:750;white-space:nowrap;min-height:40px}
.piano-tab.active{color:var(--text);border-color:#3a4656;background:#171d25}
.piano-hero,.piano-training-hero,.piano-keyboard-hero{display:flex;align-items:center;justify-content:space-between;gap:28px;border:1px solid var(--line);border-radius:24px;padding:25px;background:linear-gradient(135deg,#10151c,#0d1015 58%,#101b2a);overflow:hidden;position:relative}
.piano-hero:after,.piano-training-hero:after,.piano-keyboard-hero:after{content:"";position:absolute;right:-80px;top:-100px;width:250px;height:250px;border-radius:50%;background:radial-gradient(circle,rgba(110,168,239,.16),transparent 68%);pointer-events:none}
.piano-hero>div:first-child,.piano-training-hero>div:first-child,.piano-keyboard-hero>div:first-child{max-width:760px;position:relative;z-index:1}
.piano-kicker{display:block;color:var(--gold);font-size:10.5px;font-weight:850;letter-spacing:.18em;margin-bottom:8px}
.piano-hero h2,.piano-training-hero h2,.piano-keyboard-hero h2{margin:0;font-size:34px;letter-spacing:-.045em}
.piano-hero p,.piano-training-hero p,.piano-keyboard-hero p{margin:10px 0 0;color:var(--muted);line-height:1.65;max-width:700px;font-size:13px}
.piano-hero-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:18px}
.piano-score{display:grid;justify-items:center;gap:7px;min-width:155px;position:relative;z-index:1}
.piano-score-ring{--score:0;width:122px;height:122px;border-radius:50%;display:grid;place-items:center;background:conic-gradient(var(--gold) calc(var(--score)*1%),#202832 0);position:relative}
.piano-score-ring:after{content:"";position:absolute;inset:9px;border-radius:50%;background:#0c1015}
.piano-score-ring>div{position:relative;z-index:1;text-align:center}
.piano-score-ring b{display:block;font-size:31px;line-height:1}
.piano-score-ring span{display:block;color:var(--muted);font-size:10px;margin-top:3px}
.piano-score strong{font-size:12px}
.piano-score small{font-size:10.5px;color:var(--muted)}
.piano-kpis{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:10px}
.piano-kpis>div,.piano-period{border:1px solid var(--line);border-radius:16px;background:#10151b;padding:15px;min-width:0}
.piano-kpis b,.piano-period>b{display:block;font-size:23px;letter-spacing:-.035em}
.piano-kpis span,.piano-period>span{display:block;margin-top:5px;font-size:11px;font-weight:750}
.piano-kpis small,.piano-period>small{display:block;margin-top:4px;color:var(--muted);font-size:10px;line-height:1.4}
.piano-grid{display:grid;gap:14px}.piano-grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}
.piano-card{border:1px solid var(--line);border-radius:20px;background:linear-gradient(145deg,#10151b,#0d1116);padding:18px;min-width:0}
.piano-card-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;margin-bottom:14px}
.piano-card-head>div>span{display:block;color:var(--muted);font-size:9.5px;font-weight:850;letter-spacing:.14em;margin-bottom:4px}
.piano-card-head h3{margin:0;font-size:17px;letter-spacing:-.02em}
.piano-card-head>b,.piano-card-head>span{color:var(--muted);font-size:11px}
.piano-plan{display:grid;gap:8px}
.piano-plan button{display:grid;grid-template-columns:34px 1fr auto;align-items:center;gap:10px;border:1px solid var(--line);background:#0d1116;color:var(--text);border-radius:13px;padding:11px;text-align:left}
.piano-plan button:hover{border-color:#3a4656;background:#121821}
.piano-plan i{width:30px;height:30px;border-radius:9px;display:grid;place-items:center;background:#182230;color:var(--gold);font-style:normal;font-size:11px;font-weight:850}
.piano-plan b,.piano-plan small{display:block}.piano-plan b{font-size:12px}.piano-plan small{font-size:10px;color:var(--muted);margin-top:3px}.piano-plan strong{font-size:10.5px;color:var(--muted)}
.piano-skills{display:grid;gap:11px}
.piano-skills>div{display:grid;grid-template-columns:110px 1fr 42px;align-items:center;gap:9px;font-size:11px}
.piano-skills i{height:7px;border-radius:99px;background:#242b34;overflow:hidden}.piano-skills i b{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--gold2),var(--gold))}
.piano-skills strong{text-align:right;font-size:10.5px}
.piano-next p{color:var(--muted);font-size:12px;line-height:1.55}
.piano-progress{display:flex;align-items:center;gap:10px;margin:13px 0}
.piano-progress i{flex:1;height:7px;background:#252c36;border-radius:99px;overflow:hidden}.piano-progress i b{display:block;height:100%;background:linear-gradient(90deg,var(--gold2),var(--gold));border-radius:99px}
.piano-progress span,.piano-progress em{font-size:10px;color:var(--muted);font-style:normal;white-space:nowrap}
.piano-history{display:grid;gap:8px}.piano-history>div{display:flex;justify-content:space-between;gap:12px;align-items:center;padding:10px 0;border-bottom:1px solid var(--line)}
.piano-history>div:last-child{border-bottom:0}.piano-history b,.piano-history small{display:block}.piano-history b{font-size:11px}.piano-history small{font-size:10px;color:var(--muted);margin-top:3px}.piano-history strong{font-size:11px}
.piano-level{display:inline-flex;border:1px solid #345f8d;background:#101c2b;color:#b9d5fa;border-radius:999px;padding:5px 8px;font-size:9.5px;font-weight:800}
.piano-learn{display:grid;grid-template-columns:minmax(300px,.8fr) minmax(0,1.2fr);gap:14px;align-items:start}
.piano-lesson-list{display:grid;gap:12px}
.piano-lesson-group{border:1px solid var(--line);background:#0e1217;border-radius:18px;padding:10px}
.piano-lesson-group-head{padding:5px 6px 10px}.piano-lesson-group-head>div{display:flex;align-items:center;justify-content:space-between;gap:10px}.piano-lesson-group-head b{font-size:11px}.piano-lesson-group-head span{font-size:10px;color:var(--muted)}
.piano-lesson{width:100%;display:grid;grid-template-columns:34px 1fr auto;gap:10px;align-items:center;text-align:left;border:1px solid transparent;background:transparent;color:var(--text);border-radius:12px;padding:9px}
.piano-lesson:hover,.piano-lesson.selected{background:#151b23;border-color:#29313c}
.piano-lesson i{width:30px;height:30px;border-radius:9px;background:#171d25;display:grid;place-items:center;font-style:normal;font-size:10px;color:var(--muted)}
.piano-lesson i.done{background:#173026;color:#9addb9}.piano-lesson b,.piano-lesson small{display:block}.piano-lesson b{font-size:11px}.piano-lesson small{font-size:9.5px;color:var(--muted);margin-top:3px;line-height:1.35}.piano-lesson strong{font-size:10px;color:var(--muted)}
.piano-lesson-detail{position:sticky;top:96px;border:1px solid var(--line);border-radius:20px;background:linear-gradient(145deg,#121821,#0d1116);padding:20px}
.piano-lesson-detail .piano-card-head h3{margin-top:7px;font-size:24px}
.piano-goal{font-size:13px;color:var(--muted);line-height:1.6}
.piano-memory{border:1px solid #294766;background:#0d1724;border-radius:14px;padding:13px;margin:15px 0}
.piano-memory span,.piano-challenge span{display:block;color:var(--gold);font-size:9px;font-weight:850;letter-spacing:.13em;margin-bottom:6px}.piano-memory b{font-size:12px;line-height:1.5}
.piano-lesson-detail ol{margin:16px 0;padding-left:22px;color:#d7dde5}.piano-lesson-detail li{margin:10px 0;font-size:12px;line-height:1.55}
.piano-challenge{border:1px dashed #3b4552;border-radius:14px;padding:13px;background:#0b0f14}.piano-challenge p{margin:0;font-size:12px;line-height:1.55}
.piano-detail-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:15px}
.piano-mode-row{display:flex;gap:7px;flex-wrap:wrap}.piano-mode-row button{border:1px solid var(--line);background:#0f141a;color:var(--muted);border-radius:10px;padding:8px 11px;font-size:11px}.piano-mode-row button.active{background:#19222d;color:var(--text);border-color:#3b5069}
.piano-trainer-prompt{border:1px solid var(--line);border-radius:18px;background:#0f141a;padding:15px;display:grid;grid-template-columns:auto 1fr auto auto;gap:12px;align-items:center}
.piano-trainer-prompt>span{font-size:9px;font-weight:850;letter-spacing:.14em;color:var(--muted)}.piano-trainer-prompt>b{font-size:20px}.piano-trainer-prompt>small{font-size:10.5px;color:var(--muted)}
.piano-keyboard-card{padding:18px}
.piano-keyboard{height:260px;display:flex;position:relative;border-radius:15px;overflow:hidden;background:#080a0c;border:1px solid #20262e;user-select:none}
.piano-key{border:0;padding:0}
.piano-key.white{position:relative;flex:1;background:linear-gradient(#f8f8f3,#d6d9dc);border-right:1px solid #7d858e;color:#111;display:flex;align-items:flex-end;justify-content:center;padding-bottom:16px}
.piano-key.white:last-of-type{border-right:0}.piano-key.white span{font-size:14px;font-weight:850}.piano-key.white small{position:absolute;bottom:42px;font-size:10px;color:#555}
.piano-key.black{position:absolute;top:0;width:7%;height:62%;z-index:2;border-radius:0 0 9px 9px;background:linear-gradient(#11161c,#020304);box-shadow:0 8px 14px rgba(0,0,0,.5);color:#f4f4f4;display:flex;align-items:flex-end;justify-content:center;padding-bottom:10px}
.piano-key.black span{font-size:9px}.piano-key.black small{position:absolute;bottom:31px;font-size:9px;color:#98a1ac}
.piano-key.active.white{background:linear-gradient(#dcecff,#a9c9f3)}.piano-key.active.black{background:linear-gradient(#315679,#0b1a2a)}
.piano-key-help{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:12px;color:var(--muted);font-size:10.5px}.piano-key-help b{color:var(--text)}
.piano-chords{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:9px}.piano-chords button{border:1px solid var(--line);background:#0f141a;color:var(--text);border-radius:13px;padding:12px;text-align:left}.piano-chords button:hover{border-color:#385273}.piano-chords b,.piano-chords span,.piano-chords small{display:block}.piano-chords b{font-size:12px}.piano-chords span{font-size:11px;color:#b9d5fa;margin-top:6px}.piano-chords small{font-size:9.5px;color:var(--muted);margin-top:4px}
.piano-stat-inline{min-width:150px;border-left:1px solid var(--line);padding-left:22px;position:relative;z-index:1}.piano-stat-inline b,.piano-stat-inline span,.piano-stat-inline small{display:block}.piano-stat-inline b{font-size:34px;line-height:1}.piano-stat-inline span{font-size:11px;margin-top:6px}.piano-stat-inline small{font-size:10px;color:var(--muted);margin-top:4px}
.piano-ear-card{display:grid;justify-items:center;gap:15px;padding:26px}
.piano-ear-orb{width:180px;height:180px;border-radius:50%;display:grid;place-items:center;align-content:center;text-align:center;border:1px solid #2d3f53;background:radial-gradient(circle at 50% 35%,#17283b,#0d131a 72%);box-shadow:inset 0 0 70px rgba(110,168,239,.08)}
.piano-ear-orb span{font-size:9px;letter-spacing:.16em;color:var(--muted);font-weight:850}.piano-ear-orb b{font-size:54px;line-height:1.1;color:#b9d5fa}.piano-ear-orb small{font-size:10px;color:var(--muted);max-width:110px}
.piano-ear-actions{display:flex;gap:8px}.piano-ear-answers{display:grid;grid-template-columns:repeat(7,minmax(52px,1fr));gap:7px;width:min(620px,100%)}
.piano-ear-answers button{border:1px solid var(--line);background:#10151b;color:var(--text);border-radius:12px;min-height:52px;font-size:15px;font-weight:850}.piano-ear-answers button:hover:not(:disabled){border-color:#48698d;background:#162131}.piano-ear-answers button.target{border-color:#315b46;background:#11231b;color:#9addb9}
.piano-ear-feedback{width:min(620px,100%);padding:12px 14px;border-radius:13px}.piano-ear-feedback b,.piano-ear-feedback span{display:block}.piano-ear-feedback b{font-size:12px}.piano-ear-feedback span{font-size:10.5px;margin-top:4px;color:var(--muted)}.piano-ear-feedback.good{border:1px solid #315b46;background:#11231b}.piano-ear-feedback.bad{border:1px solid #603337;background:#271416}
.piano-rhythm-card{display:grid;justify-items:center;gap:18px;padding:24px}
.piano-rhythm-controls{width:min(520px,100%);display:grid;grid-template-columns:1fr auto;gap:10px;align-items:end}.piano-rhythm-controls .field label{display:block}
.piano-beats{display:grid;justify-items:center;gap:8px}.piano-beat-dots{display:flex;gap:9px}.piano-beat-dot{width:12px;height:12px;border-radius:50%;background:#252d37;transition:.12s}.piano-beat-dot.active{background:var(--gold);box-shadow:0 0 18px rgba(110,168,239,.45)}.piano-beats>b{font-size:48px;line-height:1}.piano-beats>span{font-size:9.5px;color:var(--muted);letter-spacing:.16em;font-weight:850}
.piano-tap{width:min(430px,100%);min-height:100px;border:1px solid #345f8d;border-radius:18px;background:linear-gradient(145deg,#17304a,#111a25);color:#f5f6f7;font-size:26px;font-weight:900;letter-spacing:.09em}.piano-tap:active:not(:disabled){transform:scale(.99)}.piano-tap small{display:block;font-size:10px;font-weight:600;color:#a9c9f3;margin-top:6px}.piano-tap:disabled{opacity:.4}
.piano-rhythm-live{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:9px;width:min(620px,100%)}.piano-rhythm-live>div{border:1px solid var(--line);border-radius:13px;background:#0e1319;padding:12px;text-align:center}.piano-rhythm-live b,.piano-rhythm-live span{display:block}.piano-rhythm-live b{font-size:19px}.piano-rhythm-live span{font-size:9.5px;color:var(--muted);margin-top:4px}
.piano-pieces{display:grid;gap:12px}.piano-piece{display:grid;grid-template-columns:58px 1fr;gap:14px;align-items:start}.piano-piece-num{font-size:34px;font-weight:900;color:#2b3440;line-height:1}.piano-piece h3{margin:6px 0 0;font-size:17px}.piano-piece-notes{margin:14px 0;padding:13px;border:1px solid #2b3541;border-radius:13px;background:#0a0e13;color:#b9d5fa;font:700 13px/1.7 ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.04em}.piano-piece p{margin:0;color:var(--muted);font-size:11px}
.piano-periods{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.piano-period .piano-progress{margin-bottom:0}
.piano-integrity{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;border-top:1px solid var(--line);padding-top:14px}.piano-integrity>div{border:1px solid var(--line);background:#0c1015;border-radius:14px;padding:13px}.piano-integrity b{font-size:11px}.piano-integrity p{margin:5px 0 0;color:var(--muted);font-size:10px;line-height:1.55}
@media(max-width:1100px){.piano-kpis{grid-template-columns:repeat(3,minmax(0,1fr))}.piano-learn{grid-template-columns:1fr}.piano-lesson-detail{position:static}.piano-chords{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:720px){
  .piano-center{gap:11px}.piano-tabs{margin:0 -2px}
  .piano-hero,.piano-training-hero,.piano-keyboard-hero{align-items:flex-start;flex-direction:column;padding:17px;border-radius:18px;gap:16px}
  .piano-hero h2,.piano-training-hero h2,.piano-keyboard-hero h2{font-size:26px}.piano-hero p,.piano-training-hero p,.piano-keyboard-hero p{font-size:11.5px}
  .piano-score{grid-template-columns:auto 1fr;justify-items:start;align-items:center}.piano-score-ring{width:88px;height:88px}.piano-score-ring b{font-size:24px}
  .piano-stat-inline{border-left:0;border-top:1px solid var(--line);padding:13px 0 0;width:100%}.piano-stat-inline b{font-size:28px}
  .piano-kpis{grid-template-columns:repeat(2,minmax(0,1fr));gap:7px}.piano-kpis>div{padding:12px}.piano-kpis b{font-size:19px}
  .piano-grid.two,.piano-integrity{grid-template-columns:1fr}.piano-card{padding:14px;border-radius:17px}.piano-plan button{grid-template-columns:32px 1fr}.piano-plan button strong{display:none}
  .piano-skills>div{grid-template-columns:92px 1fr 38px}
  .piano-learn{gap:10px}.piano-lesson-detail{padding:15px}.piano-lesson-detail .piano-card-head h3{font-size:20px}
  .piano-trainer-prompt{grid-template-columns:1fr;gap:7px}.piano-trainer-prompt>b{font-size:18px}
  .piano-keyboard{height:190px}.piano-key.white{padding-bottom:10px}.piano-key.white small{bottom:34px}.piano-key.black{height:60%;width:8%}
  .piano-chords{grid-template-columns:1fr 1fr}.piano-ear-card{padding:17px}.piano-ear-orb{width:145px;height:145px}.piano-ear-answers{grid-template-columns:repeat(4,1fr)}.piano-ear-answers button{min-height:48px}
  .piano-rhythm-controls{grid-template-columns:1fr}.piano-tap{min-height:86px}.piano-rhythm-live{grid-template-columns:1fr 1fr}.piano-rhythm-live>div:last-child{grid-column:span 2}
  .piano-piece{grid-template-columns:40px 1fr}.piano-piece-num{font-size:25px}.piano-periods{grid-template-columns:1fr}
}
@media(max-width:420px){.piano-kpis{grid-template-columns:1fr 1fr}.piano-chords{grid-template-columns:1fr}.piano-ear-answers{grid-template-columns:repeat(3,1fr)}.piano-key.white span{font-size:11px}.piano-key.white small{font-size:8px}.piano-key.black span{display:none}}


/* V140 · Piano Academy Pro */
.piano-pro{--piano-ivory:#f4f0e6;--piano-ebony:#060708;--piano-brass:#c8a15b;--piano-blue:#9fc7f3;--piano-panel:#0d1116;--piano-line:#272d35}
.piano-pro-hero,.piano-performance-hero{position:relative;overflow:hidden;display:flex;align-items:center;justify-content:space-between;gap:28px;padding:28px;border:1px solid #2a3039;border-radius:24px;background:radial-gradient(circle at 82% 15%,rgba(200,161,91,.11),transparent 29%),linear-gradient(135deg,#11161d,#090c10 58%,#111820)}
.piano-pro-hero:before,.piano-performance-hero:before{content:"";position:absolute;right:5%;bottom:-68px;width:330px;height:150px;border:1px solid rgba(244,240,230,.08);border-radius:50%;transform:rotate(-8deg)}
.piano-pro-copy{position:relative;z-index:1;max-width:760px}.piano-pro-copy h2,.piano-performance-hero h2{margin:0;font-size:38px;letter-spacing:-.05em}.piano-pro-copy>p,.piano-performance-hero p{margin:10px 0 0;max-width:720px;color:var(--muted);font-size:13px;line-height:1.7}
.piano-coach-line{margin-top:16px;border-left:2px solid var(--piano-brass);padding:8px 0 8px 12px;color:#dfe3e8;font-size:11px}.piano-coach-line b{color:#f0d39a}.piano-coach-line span{color:var(--muted);margin-left:5px}
.piano-hero-metrics{position:relative;z-index:1;display:flex;align-items:center;gap:17px;min-width:270px}.piano-hero-metrics>div:last-child{display:grid;gap:3px}.piano-hero-metrics strong{font-size:17px}.piano-hero-metrics span,.piano-hero-metrics small{font-size:10px;color:var(--muted)}
.piano-skill-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.piano-skill{border:1px solid var(--piano-line);background:#0b0f14;border-radius:13px;padding:11px}.piano-skill>div{display:flex;justify-content:space-between;gap:10px}.piano-skill b{font-size:11px}.piano-skill span{font-size:10px;color:#d9c18d}.piano-skill>i{display:block;height:5px;margin:8px 0;background:#242a32;border-radius:99px;overflow:hidden}.piano-skill>i b{display:block;height:100%;background:linear-gradient(90deg,#8b6b38,#d8b46a);border-radius:99px}.piano-skill small{font-size:9.5px;color:var(--muted);line-height:1.4}
.piano-coach-copy{margin:0 0 16px;color:var(--muted);font-size:12px;line-height:1.65}.piano-coach-target{display:grid;grid-template-columns:auto 1fr;gap:0 12px;align-items:center;margin:0 0 15px;padding:14px;border:1px solid #313743;border-radius:14px;background:#0b0f14}.piano-coach-target b{grid-row:span 2;font-size:29px;color:#e0c087}.piano-coach-target span{font-size:11px;font-weight:800}.piano-coach-target small{font-size:9.5px;color:var(--muted)}
.piano-review-list{display:grid;gap:7px}.piano-review-list button{display:flex;justify-content:space-between;align-items:center;gap:12px;width:100%;padding:10px 11px;border:1px solid var(--line);border-radius:11px;background:#0c1015;color:var(--text);text-align:left}.piano-review-list b,.piano-review-list small{display:block}.piano-review-list b{font-size:11px}.piano-review-list small{margin-top:3px;font-size:9.5px;color:var(--muted)}.piano-review-list strong{font-size:10.5px;color:#d8b46a}
.piano-mistakes{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.piano-mistakes>div{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 11px;border:1px solid #2a3038;border-radius:11px;background:#0b0f14;text-transform:capitalize}.piano-mistakes span{font-size:10.5px;color:var(--muted)}.piano-mistakes strong{font-size:14px}
.piano-evidence{display:flex;align-items:center;justify-content:space-between;gap:14px;margin:14px 0;padding:12px;border-radius:12px;border:1px solid #3a414b;background:#0c1116}.piano-evidence b{font-size:10.5px}.piano-evidence span{font-size:10px;color:var(--muted);text-align:right}.piano-evidence.good{border-color:#315b46;background:#102019}.piano-evidence.good b{color:#9addb9}.piano-evidence.warn{border-color:#65522d;background:#201a0f}.piano-evidence.warn b{color:#e0c087}
.piano-checkpoint>p{font-size:13px;line-height:1.55}.piano-quiz-option{display:flex;align-items:center;gap:9px;padding:10px 11px;margin:7px 0;border:1px solid var(--line);border-radius:11px;background:#0d1116}.piano-quiz-option input{accent-color:#c8a15b}.piano-quiz-option span{font-size:11px}
.piano-lesson-group-head i{display:block;height:4px;margin-top:9px;background:#252b32;border-radius:99px;overflow:hidden}.piano-lesson-group-head i b{display:block;height:100%;background:#c8a15b;border-radius:99px}
.piano-models{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.piano-model{border:1px solid #292f38;border-radius:18px;background:linear-gradient(145deg,#10151a,#0a0d11);color:var(--text);padding:17px;text-align:left;min-height:180px;transition:.2s}.piano-model:hover{border-color:#4a5360;transform:translateY(-1px)}.piano-model.active{border-color:#8d7444;box-shadow:inset 0 0 0 1px rgba(200,161,91,.18)}.piano-model>span{display:block;font-size:9px;letter-spacing:.12em;color:#d6b979;font-weight:850}.piano-model h3{margin:7px 0 4px;font-size:18px}.piano-model>b{font-size:11px;color:#e6e9ed}.piano-model p{margin:10px 0 0;font-size:10.5px;line-height:1.55;color:var(--muted)}
.piano-audio-engines{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:9px}.piano-audio-engines button{display:grid;gap:5px;border:1px solid #2b313a;border-radius:14px;background:#0b0f14;color:var(--text);padding:13px;text-align:left}.piano-audio-engines button.active{border-color:#8f7543;background:linear-gradient(145deg,#17140f,#0e1115)}.piano-audio-engines span{font-size:9px;color:#d1b474;text-transform:uppercase;letter-spacing:.09em}.piano-audio-engines b{font-size:12px}.piano-audio-engines small{font-size:9.5px;line-height:1.45;color:var(--muted)}
.piano-sample-status{border:1px solid #303741;border-radius:999px;padding:5px 8px;font-size:9px;color:var(--muted)}.piano-sample-status.ready{border-color:#315b46;color:#9addb9}.piano-sample-status.loading{border-color:#60502f;color:#e0c087}.piano-sample-status.error{border-color:#603337;color:#dc959b}
.piano-audio-controls{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin-top:14px;padding-top:12px;border-top:1px solid var(--line)}.piano-audio-controls label{display:flex;align-items:center;gap:8px;font-size:10px;color:var(--muted)}.piano-audio-controls input[type="range"]{width:150px}.piano-switch input{accent-color:#c8a15b}.piano-license{margin:11px 0 0;font-size:9px;line-height:1.55;color:#737b85}
.piano-keyboard-scroll{overflow-x:auto;overflow-y:hidden;padding-bottom:8px;scrollbar-width:thin}.piano-keyboard-studio{min-width:760px}.piano-keyboard-concert{min-width:2400px;height:300px}.piano-keyboard-concert .piano-key.white{min-width:46px}.piano-keyboard-concert .piano-key.black{width:30px;--black-half:15px}.piano-keyboard-compact{--black-half:3.5%}.piano-keyboard-studio{--black-half:14px}.piano-keyboard-studio .piano-key.black{width:28px}.piano-keyboard{--black-half:3.5%}
.piano-key:focus-visible{outline:2px solid #c8a15b;outline-offset:-2px}
.piano-inputs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.piano-inputs.three{grid-template-columns:repeat(3,minmax(0,1fr))}.piano-inputs>div{display:grid;align-content:start;gap:7px;border:1px solid #2b3139;border-radius:14px;background:#0b0f14;padding:14px}.piano-inputs b{font-size:12px}.piano-inputs span{font-size:9.5px;color:#b8c0c9}.piano-inputs p{margin:0;font-size:10px;line-height:1.5;color:var(--muted)}.piano-inputs strong{font-size:18px;color:#d8b46a}
.piano-tech-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.piano-tech-list>div{display:grid;grid-template-columns:34px 1fr;gap:9px;align-items:center;border:1px solid #282e36;border-radius:12px;padding:10px;background:#0b0f14}.piano-tech-list i{font-style:normal;font-size:9px;color:#d8b46a}.piano-tech-list span{font-size:10.5px;line-height:1.45}
.piano-score-scroll{overflow-x:auto;overflow-y:hidden;border:1px solid #292f37;border-radius:14px;background:var(--piano-ivory);padding:8px 8px 2px}.piano-sheet{width:100%;min-width:620px;height:150px;color:#9b6f20}.piano-sheet .staff line{stroke:#1b1b1b;stroke-width:1}.piano-sheet .clef{font-size:48px;fill:#111}.piano-sheet line:not(.staff line){stroke:#1a1a1a;stroke-width:1.5}.piano-sheet text:not(.clef){fill:#555;font-size:8px}.piano-sheet g.active ellipse{fill:#b6842e}.piano-sheet g.active line{stroke:#b6842e}
.piano-repertoire{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.piano-piece-card{border:1px solid #292f37;border-radius:19px;background:linear-gradient(145deg,#10151a,#0b0e12);padding:17px}.piano-piece-meta{display:flex;justify-content:space-between;gap:10px;align-items:center}.piano-piece-meta>span:last-child{font-size:9.5px;color:var(--muted)}.piano-piece-card h3{margin:10px 0 5px;font-size:19px}.piano-piece-card>p{margin:0 0 13px;color:var(--muted);font-size:10.5px}.piano-piece-stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:7px;margin:12px 0}.piano-piece-stats>div{border:1px solid #292f37;border-radius:10px;padding:9px;background:#0a0d11}.piano-piece-stats b,.piano-piece-stats span{display:block}.piano-piece-stats b{font-size:11px}.piano-piece-stats span{font-size:9px;color:var(--muted);margin-top:3px}
.piano-performance-hero>div:first-child{max-width:700px}.piano-performance-status{position:relative;z-index:1;min-width:180px;border-left:1px solid #313841;padding-left:20px}.piano-performance-status b,.piano-performance-status span{display:block}.piano-performance-status b{font-size:15px}.piano-performance-status span{margin-top:5px;font-size:10px;color:var(--muted)}
.piano-performance-controls{display:grid;grid-template-columns:2fr repeat(3,1fr);gap:9px}.piano-performance-controls label{display:grid;gap:5px;font-size:9px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}.piano-performance-stage{padding:17px}.piano-stage-keyboard{margin-top:12px}.piano-stage-keyboard .piano-keyboard{height:180px}.piano-stage-keyboard .piano-keyboard-concert{height:190px}.piano-performance-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.piano-performance-result{display:grid;grid-template-columns:1.2fr repeat(3,1fr) auto;gap:9px;align-items:center;border:1px solid #7c663d;border-radius:18px;background:linear-gradient(135deg,#18140d,#0c1014);padding:15px}.piano-performance-result>div{padding:7px 10px;border-right:1px solid #34302a}.piano-performance-result>div:last-of-type{border-right:0}.piano-performance-result b,.piano-performance-result span,.piano-performance-result small{display:block}.piano-performance-result>div:first-child b{font-size:30px}.piano-performance-result span,.piano-performance-result small{font-size:9px;color:var(--muted)}
.piano-periods{grid-template-columns:repeat(4,minmax(0,1fr))}
.piano-exams{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.piano-exam{border:1px solid #2a3038;border-radius:15px;background:#0b0f14;padding:13px}.piano-exam.passed{border-color:#315b46;background:#0f1a15}.piano-exam>div:first-child{display:flex;justify-content:space-between;gap:10px;align-items:flex-start}.piano-exam>div:first-child span{font-size:9px;color:#d2b675;text-transform:uppercase;letter-spacing:.09em}.piano-exam h3{margin:4px 0 0;font-size:14px}.piano-exam>b{display:block;margin:9px 0;font-size:11px}.piano-exam-checks{display:grid;gap:5px;margin-bottom:10px}.piano-exam-checks>div{display:flex;justify-content:space-between;gap:10px;font-size:9.5px;color:var(--muted)}.piano-exam-checks>div.good strong{color:#9addb9}.piano-exam .btn{width:100%}
.piano-mode-row{align-items:center}.piano-mode-row button{min-height:34px}
.piano-plan-row{cursor:pointer}.piano-plan-row:focus-visible,.piano-model:focus-visible,.piano-audio-engines button:focus-visible{outline:2px solid #c8a15b;outline-offset:2px}

@media(max-width:1100px){
  .piano-models,.piano-audio-engines{grid-template-columns:1fr 1fr}.piano-models .piano-model:last-child,.piano-audio-engines button:last-child{grid-column:span 2}
  .piano-repertoire{grid-template-columns:1fr}.piano-performance-controls{grid-template-columns:1fr 1fr}.piano-periods{grid-template-columns:repeat(2,minmax(0,1fr))}
  .piano-inputs.three{grid-template-columns:1fr 1fr}.piano-inputs.three>div:last-child{grid-column:span 2}
}
@media(max-width:720px){
  .piano-pro-hero,.piano-performance-hero{flex-direction:column;align-items:flex-start;padding:18px;border-radius:18px}.piano-pro-copy h2,.piano-performance-hero h2{font-size:29px}.piano-hero-metrics{min-width:0;width:100%}
  .piano-skill-grid,.piano-models,.piano-audio-engines,.piano-inputs,.piano-inputs.three,.piano-tech-list,.piano-exams{grid-template-columns:1fr}.piano-models .piano-model:last-child,.piano-audio-engines button:last-child,.piano-inputs.three>div:last-child{grid-column:auto}
  .piano-performance-controls{grid-template-columns:1fr}.piano-performance-status{border-left:0;border-top:1px solid #313841;padding:12px 0 0;width:100%}
  .piano-performance-result{grid-template-columns:1fr 1fr}.piano-performance-result>div{border-right:0}.piano-performance-result>button{grid-column:span 2}
  .piano-keyboard-concert{min-width:2100px;height:230px}.piano-keyboard-concert .piano-key.white{min-width:40px}.piano-keyboard-studio{min-width:650px}.piano-periods{grid-template-columns:1fr 1fr}
  .piano-mistakes{grid-template-columns:1fr}.piano-evidence{align-items:flex-start;flex-direction:column}.piano-evidence span{text-align:left}
}
@media(max-width:430px){
  .piano-periods,.piano-piece-stats{grid-template-columns:1fr}.piano-performance-result{grid-template-columns:1fr}.piano-performance-result>button{grid-column:auto}.piano-audio-controls{align-items:flex-start;flex-direction:column}.piano-audio-controls input[type="range"]{width:190px}
}


/* V141 · Song Practice Library */
.piano-song-filters{display:grid;gap:8px;padding:12px;border:1px solid #292f37;border-radius:16px;background:#0b0f14}
.piano-song-filters>div{display:flex;gap:7px;flex-wrap:wrap}
.piano-song-filters button{border:1px solid #2d343d;background:#10151b;color:var(--muted);border-radius:999px;padding:7px 10px;font-size:9.5px}
.piano-song-filters button.active{border-color:#8f7543;background:#1b1710;color:#ecd49d}
.piano-songs-layout{display:grid;grid-template-columns:minmax(340px,.9fr) minmax(0,1.4fr);gap:12px;align-items:start}
.piano-song-library{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;max-height:930px;overflow:auto;padding-right:4px}
.piano-song-card{display:grid;align-content:start;gap:6px;min-height:205px;border:1px solid #292f37;border-radius:15px;background:linear-gradient(145deg,#10151a,#0a0e12);color:var(--text);padding:13px;text-align:left}
.piano-song-card:hover{border-color:#4a5360;transform:translateY(-1px)}
.piano-song-top{display:flex;justify-content:space-between;gap:7px;align-items:center}
.piano-song-region,.piano-song-rights{font-size:8px;font-weight:850;letter-spacing:.09em;text-transform:uppercase}
.piano-song-region{color:#d3b674}.piano-song-rights{border:1px solid #3b424c;border-radius:999px;padding:3px 6px;color:#8f98a3}
.piano-song-rights.full{border-color:#315b46;color:#91d5b0}.piano-song-rights.guided{border-color:#65522d;color:#d6b979}
.piano-song-card h3{margin:4px 0 0;font-size:15px;line-height:1.2}.piano-song-card p{margin:0;color:#aeb6bf;font-size:9.5px}
.piano-song-card>small{display:block;margin-top:2px;color:var(--muted);font-size:9.5px;line-height:1.45}
.piano-song-meta{display:flex;gap:5px;flex-wrap:wrap}.piano-song-meta span{border:1px solid #2c333c;border-radius:999px;padding:3px 6px;font-size:8px;color:#aeb6bf}
.piano-song-attempts{margin-top:auto;padding-top:7px;border-top:1px solid #252b32;font-size:8.5px;color:#6f7781}
.piano-song-detail{position:sticky;top:95px}
.piano-song-detail .piano-card-head p{margin:5px 0 0;font-size:10px;color:var(--muted)}
.piano-song-detail-grid{display:grid;grid-template-columns:140px 100px 1fr;gap:8px;margin:12px 0}
.piano-song-detail-grid>div{border:1px solid #292f37;border-radius:11px;background:#0b0f14;padding:10px}
.piano-song-detail-grid span,.piano-song-detail-grid b{display:block}.piano-song-detail-grid span{font-size:8.5px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}.piano-song-detail-grid b{margin-top:4px;font-size:10.5px;line-height:1.45}
.piano-song-block{padding:12px 0;border-top:1px solid #252b32}.piano-song-block>span{display:block;margin-bottom:8px;font-size:8.5px;font-weight:850;color:#8e97a2;letter-spacing:.1em}
.piano-song-notes,.piano-song-chords{display:flex;gap:7px;flex-wrap:wrap}
.piano-song-notes span{display:grid;place-items:center;min-width:36px;height:36px;border:1px solid #3b444f;border-radius:10px;background:#f0eee7;color:#111;font-size:12px;font-weight:900}
.piano-song-chords button{border:1px solid #7b673f;border-radius:10px;background:#17130d;color:#e8d19b;padding:9px 12px;font-size:11px;font-weight:850}
.piano-song-chords button:hover{background:#211a0e}
.piano-song-guided{margin:12px 0;padding:13px;border:1px solid #65522d;border-radius:13px;background:#1d180f}.piano-song-guided b{display:block;color:#e0c087;font-size:10.5px}.piano-song-guided p{margin:6px 0 0;color:#aeb6bf;font-size:9.5px;line-height:1.55}
.piano-song-full{margin:12px 0;padding:12px;border:1px solid #315b46;border-radius:14px;background:#0d1712}.piano-song-full .piano-card-head{margin-bottom:10px}
.piano-note-sequence{margin-top:9px;padding:10px;border-radius:10px;background:#090d10;color:#c8d5e4;font:700 10px/1.7 ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.05em}
.piano-song-actions{margin-top:12px}

@media(max-width:1120px){
  .piano-songs-layout{grid-template-columns:1fr}.piano-song-detail{position:static}.piano-song-library{max-height:none}
}
@media(max-width:720px){
  .piano-song-library{grid-template-columns:1fr}.piano-song-detail-grid{grid-template-columns:1fr 1fr}.piano-song-detail-grid>div:last-child{grid-column:span 2}
}
@media(max-width:430px){
  .piano-song-detail-grid{grid-template-columns:1fr}.piano-song-detail-grid>div:last-child{grid-column:auto}
}


/* V142 · Piano model launch reliability */
.piano-model{cursor:pointer;position:relative;display:flex;flex-direction:column}
.piano-model-cta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:15px;border-top:1px solid #252b32}
.piano-model-cta strong{font-size:10px;color:#f0f2f4}
.piano-model-cta small{font-size:9px;color:#d6b979}
.piano-model.active .piano-model-cta{border-top-color:#6f5d37}
.piano-model.active .piano-model-cta strong{color:#e3c680}
#pianoActiveKeyboard{scroll-margin-top:110px;box-shadow:0 0 0 1px rgba(200,161,91,.04)}