/* Scoped to the four reference lessons; auditorium and legacy screens untouched. */
.v2-lesson{max-width:960px;margin:auto;min-width:0}
.v2-lesson .music-card{background:#fffef9;color:#211914;padding:12px;border:1px solid #d7c9b6;border-radius:8px;overflow-x:auto}
.v2-lesson .studio-score-v2{display:block;min-width:400px;width:100%;height:auto;cursor:default}
.v2-lesson .music-card p,.v2-lesson .activity-explanation{color:#211914}
.v2-lesson #v2-engine-host{display:grid;gap:14px;min-width:0}
.v2-lesson #v2-engine-host>button{justify-self:start}
.v2-lesson button,.v2-lesson select{min-height:44px;touch-action:manipulation}
.v2-lesson button:focus-visible,.v2-lesson select:focus-visible,.v2-lesson input:focus-visible{outline:3px solid #b7873a;outline-offset:3px}
.v2-lesson button.selected,.v2-lesson button[aria-pressed="true"]{outline:3px solid #b7873a;outline-offset:-3px;background:#ead8b1;color:#251b17}
.v2-pitch-tools,.v2-letter-tools,.v2-rhythm-tools,.v2-rhythm-modifiers{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.v2-pitch-tools select{background:#fffaf1;color:#241911;border:1px solid #8d7964;border-radius:6px;padding:6px}
.v2-rhythm-modifiers label{display:flex;align-items:center;gap:6px;min-height:44px}
.v2-rhythm-modifiers input{width:20px;height:20px}
.v2-lesson .v2-rhythm-measure{display:block;width:100%;border:2px solid #b49b74;padding:0;min-height:130px;text-align:left}
.v2-rhythm-measure:hover{border-color:#765725}
.v2-keyboard-scroll{overflow-x:auto;padding:6px 4px 12px;border:1px solid #c7b49b;border-radius:8px;background:#352820;max-width:100%}
.v2-keyboard{position:relative;height:174px;min-width:calc(var(--key-count)*44px);width:100%}
.v2-lesson .v2-key{position:absolute;top:0;border:1px solid #473b30;border-radius:0 0 6px 6px;padding:0;box-sizing:border-box;min-width:0;font-size:11px}
.v2-lesson .v2-key.white{height:168px;background:#fffdf8;color:#261c17;z-index:1}
.v2-lesson .v2-key.black{height:108px;background:#261f1a;color:white;z-index:2;min-height:108px}
.v2-key span{position:absolute;bottom:10px;left:0;right:0;text-align:center;pointer-events:none}
.v2-lesson .v2-key.selected{background:#a66b35;color:white}
.v2-lesson .v2-tap{width:100%;min-height:112px;justify-self:stretch!important;user-select:none;touch-action:none}
.v2-lesson [data-engine-status]{min-height:1.5em}
.v2-lesson .v2-correction:empty{display:none}
.v2-lesson .answer-grid{grid-template-columns:repeat(auto-fit,minmax(130px,1fr));min-width:0}
.v2-lesson .answer-btn{overflow-wrap:anywhere}
@media(max-width:600px){.v2-lesson{padding:16px!important}.v2-lesson .lesson-head{flex-wrap:wrap;gap:10px}.v2-lesson .music-card{padding:6px}.v2-letter-tools button{flex:1;min-width:44px}.v2-rhythm-tools button{font-size:13px;padding:8px}.v2-lesson .writing-actions{flex-wrap:wrap}.v2-lesson .lesson-head h2{font-size:24px}.v2-rhythm-modifiers{gap:6px 12px}}