/* Retain the established shelf dimensions, text and native SVG fallback. */
#shelf .course-art[data-course-ready=true]>[data-course-native]{display:none}
#shelf .course-art [data-course-generated]{pointer-events:none}
#shelf .library-thumbnail{background:linear-gradient(150deg,#fff8e6,#f3e5cc);border:1px solid #dbc49c;box-shadow:inset 0 2px 0 #fff9,0 2px 0 #cdb78d}
#shelf .course-art[data-course-ready=true]{filter:drop-shadow(0 2px 1px #72543220)}
#shelf .library-thumbnail>b{z-index:1}
.smart-tool-icon{display:inline-block;width:26px;height:26px;flex:none;vertical-align:middle;pointer-events:none;overflow:visible}
#bookDock>.smart-tool-icon,#reviewDock>.smart-tool-icon,#aiPanel .arhead>.smart-tool-icon{width:44px;height:44px}
#soundBtn>.smart-tool-icon{width:24px;height:24px}
#soundBtn>.smart-tool-icon [data-sound-off]{display:none}
#soundBtn[aria-pressed=false]>.smart-tool-icon [data-sound-on]{display:none}
#soundBtn[aria-pressed=false]>.smart-tool-icon [data-sound-off]{display:inline}
#parentBtn{display:inline-flex;align-items:center;justify-content:center;gap:5px}
#sceneMusic>.smart-tool-icon{width:24px;height:24px}
#sceneMusic.is-muted>.smart-tool-icon{opacity:.6}
.library-back>.smart-tool-icon,.back>.smart-tool-icon{width:22px;height:22px;margin-right:4px}
.sx>.smart-tool-icon,[data-audio-close]>.smart-tool-icon{width:22px;height:22px}
#sceneAudioPanel [data-audio-close],#shelf .sx,#aiPanel .sx,#pClose{min-width:44px;min-height:44px;display:grid;place-items:center}
#shelf .lib-search>span>.smart-tool-icon{width:22px;height:22px}
@media(max-width:650px){#parentBtn>.smart-tool-icon{display:none}}