.app-shell .score-heading>div:first-child{flex:1;min-width:0}
.source-button{min-height:44px;min-width:64px;display:flex;align-items:center;justify-content:center;gap:5px;flex:none;border:1px solid var(--line);border-radius:8px;background:var(--green-light);color:var(--green);font:inherit;font-size:12px;cursor:pointer}
.source-button svg,.mode-choice svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex:none}
.mode-intro{margin:0 0 16px;font-size:14px;color:var(--muted)}
.mode-choice{display:flex;align-items:center;gap:14px;width:100%;min-height:80px;margin:0 0 12px;padding:14px;border:1px solid var(--line);border-radius:12px;background:var(--paper);color:var(--green);text-align:left;font:inherit;cursor:pointer}
.mode-choice:active{background:var(--green-light)}
.mode-choice>span:first-of-type{flex:1;min-width:0}.mode-choice strong{display:block;color:var(--ink);font-size:17px}.mode-choice small{display:block;font-size:12px;line-height:1.6;color:var(--muted);margin-top:5px}
.mode-note,.piano-credit{font-size:12px;line-height:1.65;color:var(--muted);margin:14px 0 0}.piano-credit{border-top:1px solid var(--line);padding-top:12px}.piano-credit a{color:var(--green)}
.app-shell #source-dialog{height:min(820px,calc(var(--app-height,100dvh) - 12px));max-width:1100px;width:100%}
.source-context{padding:12px 18px 0;flex:none}.source-context strong{display:block;font-size:15px;line-height:1.5}.source-context p{margin:4px 0;font-size:12px;color:var(--muted);line-height:1.4}
.source-tools{display:flex;flex:none;gap:8px;align-items:center;flex-wrap:wrap;padding:6px 18px;border-bottom:1px solid var(--line)}
.source-tools button,.source-tools a{min-height:44px;display:inline-flex;align-items:center;justify-content:center;font:inherit;font-size:13px;color:var(--green);background:transparent;border:1px solid var(--line);border-radius:6px;padding:0 10px;text-decoration:none;cursor:pointer}
.source-image-stage{flex:1;min-height:0;overflow:auto;overscroll-behavior:contain;touch-action:pan-x pan-y pinch-zoom;background:#f1f3f0;padding:12px;-webkit-overflow-scrolling:touch}
.source-image-stage img{display:block;width:100%;max-width:none;height:auto;background:white}
#source-message{font-size:12px;line-height:1.5;margin:0;padding:8px 18px;flex:none;color:var(--muted)}
.app-shell .transport #listen:after{content:'⌄';font-size:15px;margin-left:2px}
@media(max-width:600px){.app-shell #score-metadata{display:none}.app-shell .score-heading{align-items:center;padding-top:5px;padding-bottom:5px}.app-shell .score-heading h2{font-size:16px}.app-shell .source-button{min-width:60px}}
@media(max-height:500px) and (orientation:landscape){.app-shell .source-button{margin-left:8px}.app-shell #source-dialog .source-context{display:none}.source-tools{padding-top:0;padding-bottom:0}}