/* Classroom-only styling; normal game layouts and homepage stay independent. */
.cd-hub-intro{display:flex;align-items:center;gap:14px;margin:18px 0 24px}.cd-hub-intro p{font-size:.9rem;color:#5d5268}.cd-launch-layout{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(280px,.8fr);gap:24px}.cd-launcher,.cd-launch-aside section{background:#fff;border:1px solid #ded5e8;border-radius:20px;padding:26px}.cd-launcher>label{margin:20px 0}.cd-launcher h2{margin-top:0}.cd-field-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin:20px 0}.cd-launcher small{font-size:.76rem;font-weight:500;line-height:1.4}.cd-check{display:flex!important;flex-direction:row!important;align-items:center;gap:9px!important;min-height:38px}.cd-check input{width:20px!important;height:20px;min-height:20px!important;flex:none;accent-color:#7341ce}.cd-launch-aside{display:grid;align-content:start;gap:18px}.cd-launch-aside section:first-child{background:#eadeff}.cd-launch-aside p{font-size:.94rem;color:#5b4d6a;line-height:1.65}.cd-launch-aside strong{color:#211b2b}.cd-launch-aside button{margin-top:12px}.cd-preferences{border-block:1px solid #e7dff0;padding:14px 0;margin:22px 0}.cd-launcher summary,.cd-supported summary{cursor:pointer;font-weight:800;min-height:44px;display:flex;align-items:center;gap:8px}.cd-launcher summary::before,.cd-supported summary::before{content:'+';font-size:1.3rem;color:#7540cc}.cd-supported{margin-top:38px}.cd-supported>p{color:#675b73;line-height:1.6}.cd-game-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:22px 0}.cd-game-grid button{text-align:left;min-height:115px;background:#fff;border:1px solid #d9cce9;border-radius:16px;padding:18px;cursor:pointer;color:#211b2b;font:inherit}.cd-game-grid button span{display:block;color:#42705d;font-size:.62rem;letter-spacing:.1em;font-weight:900;margin-bottom:10px}.cd-game-grid button strong{font-size:1rem;line-height:1.3}.cd-game-grid button:hover,.cd-game-grid button[aria-pressed=true]{background:#efe5ff;border-color:#8c52ff}.cd-fallback-grid{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0}.cd-fallback-grid button{font:inherit;min-height:48px;cursor:pointer;background:white;border:1px solid #ccbcdf;color:#452b61;border-radius:10px;padding:10px 16px}.cd-custom{background:#f5f0fc;border-radius:12px;padding:16px}.cd-custom fieldset{margin:0 0 16px;border:0;padding:0;min-width:0}.cd-custom legend{font-size:.85rem;font-weight:800;margin-bottom:8px}.cd-custom-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:5px;max-height:230px;overflow:auto}.cd-custom-list label{flex-direction:row;align-items:center;gap:6px;font-size:.74rem;min-height:38px}.cd-custom-list input{min-height:18px;width:18px;accent-color:#7341ce}
.cd-session{--cd-bg:#f4f0f9;--cd-card:#fff;--cd-ink:#211b2b;--cd-muted:#645670;--cd-border:#d8cbe6;--cd-soft:#eee4ff;--cd-purple:#6331bd;--theory-accent:#7040c4;position:fixed;inset:0;z-index:65;overflow:auto;overscroll-behavior:contain;background:var(--cd-bg);color:var(--cd-ink);font-family:inherit;padding:0 clamp(12px,2.5vw,40px);scrollbar-gutter:stable}
.cd-session[data-theme=dark]{--cd-bg:#15111d;--cd-card:#251e30;--cd-ink:#fff;--cd-muted:#d4c8e2;--cd-border:#5c496f;--cd-soft:#3c2a55;--cd-purple:#c8a4ff}.cd-active>main,.cd-active>.site-header,.cd-active>.site-footer{display:none!important}.cd-active{overflow:hidden}.cd-top{display:flex;justify-content:space-between;align-items:center;gap:16px;border-bottom:1px solid var(--cd-border);padding:12px 0}.cd-top>div{display:flex;align-items:center;flex-wrap:wrap;gap:16px}.cd-brand{font-size:1.25rem;font-weight:900;letter-spacing:-.06em;color:var(--cd-ink);text-decoration:none}.cd-brand span{color:var(--cd-purple)}.cd-top [data-cd-context]{font-size:.82rem;font-weight:750;color:var(--cd-muted)}.cd-top-actions{gap:8px!important}.cd-session button,.cd-fallback-bar button,.cd-dialog button{font-family:inherit;font-size:.86rem;font-weight:800;line-height:1.2;color:var(--cd-ink,#211b2b);background:var(--cd-card,#fff);border:1px solid var(--cd-border,#d8cbe6);border-radius:10px;padding:11px 15px;min-height:46px;cursor:pointer;touch-action:manipulation;user-select:none}.cd-session button:hover{background:var(--cd-soft)}.cd-session button:disabled{cursor:default;opacity:.6}.cd-session :is(button,input,select,a,summary):focus-visible,.cd-dialog button:focus-visible,.cd-fallback-bar button:focus-visible{outline:3px solid #a77aff;outline-offset:3px}.cd-session button.cd-primary{background:#6a35c8;color:#fff;border-color:#6a35c8}.cd-session button.cd-primary:hover{background:#5322ab}.cd-session-meta{display:flex;align-items:center;flex-wrap:wrap;gap:24px;min-height:44px;padding:8px 0;font-size:.9rem;font-weight:800;color:var(--cd-muted)}.cd-timer{margin-left:auto;display:flex;align-items:center;gap:8px}.cd-timer strong{font-size:1.6rem;font-variant-numeric:tabular-nums;min-width:3ch;text-align:right;color:var(--cd-ink)}.cd-timer button{min-height:38px;padding:8px 12px;font-size:.75rem}.cd-time-up{color:#c75036!important}.cd-stage{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);align-content:start;gap:14px 24px;max-width:1650px;margin:auto;padding:10px 0 16px}.cd-stage h1{grid-column:1/-1;text-align:center;font-size:clamp(1.45rem,2.5vw,2.4rem);line-height:1.18;margin:0 0 4px;letter-spacing:-.035em}.cd-audio{grid-column:1/-1;display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:10px}.cd-audio button:first-child{background:#6a35c8;color:#fff;font-size:1.05rem;min-width:170px;min-height:52px}.cd-audio span{font-size:.78rem;color:var(--cd-muted)}.cd-notation{display:grid;place-items:center;align-self:start;min-height:220px;border-radius:18px;padding:12px;background:#fff;color:#211b2b;overflow:hidden;border:1px solid #d8cbe6}.cd-notation:empty{display:none}.cd-notation:empty+.cd-answers{grid-column:1/-1}.cd-notation svg{display:block;width:100%;height:clamp(220px,32vh,390px);color:#211b2b}.cd-session[data-notation=large] .cd-notation{grid-column:1/-1}.cd-session[data-notation=large] .cd-notation svg{height:clamp(280px,42vh,500px)}.cd-session[data-notation=large] .cd-answers{grid-column:1/-1}.cd-listening{text-align:center;color:#6331bd}.cd-listening span{font-size:6rem;line-height:1}.cd-listening p{font-size:1.15rem;font-weight:800}.cd-pitch{text-align:center;padding:28px}.cd-pitch small{display:block;font-size:.85rem;letter-spacing:.13em;color:#654f7b;font-weight:800}.cd-pitch strong{display:block;font-size:clamp(4rem,7vw,7rem);line-height:1.3}.cd-answers{display:grid;align-content:center;gap:12px;min-width:0}.cd-answers fieldset{min-width:0;padding:0;margin:0;border:0}.cd-answers legend{font-size:.8rem;color:var(--cd-muted);font-weight:850;margin-bottom:7px}.cd-choice-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(68px,1fr));gap:8px}.cd-choice-grid button{position:relative;min-height:60px;padding:10px 8px;font-size:clamp(1rem,1.6vw,1.5rem);overflow-wrap:anywhere}.cd-choice-grid button.is-selected{background:var(--cd-soft);border:3px solid #8c52ff;padding:8px 6px}.cd-choice-grid button.is-correct{background:#d9f5e6;color:#14513c;border:3px solid #208158;opacity:1;padding:8px 6px}.cd-choice-grid button.is-wrong{background:#fce1db;color:#852f21;border-color:#b94833;opacity:1}.cd-answer-mark{display:block;font-size:.65rem;margin-top:4px}.cd-rhythm-choices{grid-template-columns:repeat(2,minmax(0,1fr))}.cd-rhythm-choices button{background:#fff;color:#211b2b;min-height:110px}.cd-rhythm-choices svg{width:100%;height:95px;display:block}.cd-feedback,.cd-hint,.cd-summary{grid-column:1/-1;margin:0;padding:12px 17px;background:var(--cd-card);border:1px solid var(--cd-border);border-radius:12px;font-size:clamp(.95rem,1.5vw,1.2rem);line-height:1.5;color:var(--cd-muted)}.cd-feedback.cd-revealed{background:var(--cd-soft);color:var(--cd-ink);border-color:#8c52ff}.cd-hint{background:var(--cd-soft);color:var(--cd-ink)}.cd-summary{text-align:center}.cd-summary h2{margin:0 0 6px}.cd-teams{max-width:1650px;margin:0 auto 14px;background:var(--cd-card);border:1px solid var(--cd-border);border-radius:14px;padding:10px 14px}.cd-team-heading{display:flex;align-items:center;gap:9px;margin-bottom:8px}.cd-team-heading strong{margin-right:auto;font-size:.85rem}.cd-team-heading button{min-height:36px;padding:7px 10px;font-size:.75rem}.cd-team-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px}.cd-team{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;border-left:6px solid var(--team-color);padding:4px 10px;gap:5px}.cd-team input{font:inherit;font-weight:800;width:100%;min-width:0;background:var(--cd-card);color:var(--cd-ink);border:1px solid var(--cd-border);border-radius:6px;padding:7px;min-height:40px}.cd-team>strong{font-size:1.8rem;min-width:2ch;text-align:right;font-variant-numeric:tabular-nums}.cd-team>div{grid-column:1/-1;display:flex;align-items:center;gap:6px}.cd-team button{min-height:44px;min-width:48px;padding:8px}.cd-team select{font:inherit;max-width:110px;background:var(--cd-card);color:var(--cd-ink);border:1px solid var(--cd-border);min-height:44px;border-radius:6px}.cd-controls{position:sticky;bottom:0;display:flex;align-items:center;justify-content:center;gap:8px;flex-wrap:wrap;padding:12px 0;background:var(--cd-bg);border-top:1px solid var(--cd-border);z-index:2}.cd-live-preferences{font-size:.8rem}.cd-live-preferences summary{min-height:46px;padding:14px;cursor:pointer;font-weight:800}.cd-live-preferences>div{position:absolute;bottom:100%;right:0;border:1px solid var(--cd-border);background:var(--cd-card);padding:18px;box-shadow:0 5px 25px #0003;border-radius:12px;min-width:240px;display:grid;gap:12px}.cd-live-preferences label{display:grid;gap:6px}.cd-live-preferences select{min-height:44px;font:inherit;background:var(--cd-card);color:var(--cd-ink);border:1px solid var(--cd-border);border-radius:6px}.cd-status{font-size:.8rem;line-height:1.4;margin:8px 0 18px;text-align:center;color:var(--cd-muted)}.cd-status:empty{margin:0}.cd-dialog{max-width:520px;width:calc(100% - 32px);border:1px solid #d9cce9;border-radius:20px;padding:28px;color:#211b2b;background:#fff}.cd-dialog::backdrop{background:#15111dbb}.cd-dialog h2{margin-top:0}.cd-dialog dl>div{display:flex;gap:20px;align-items:center;margin:12px 0}.cd-dialog dt{min-width:58px}.cd-dialog dd{margin:0}.cd-dialog kbd{background:#eee4ff;padding:6px 10px;border-radius:5px;font-size:.9rem}.cd-dialog p{font-size:.85rem;line-height:1.5;color:#65546f}.cd-sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}.cd-fallback-bar{position:sticky;top:0;z-index:30;display:flex;align-items:center;flex-wrap:wrap;gap:10px;background:#211b2b;color:#fff;padding:12px 24px}.cd-fallback-bar strong{margin-right:auto;font-size:.9rem}.cd-fallback-bar span{width:100%;font-size:.8rem}.cd-fallback-bar span:empty{display:none}.cd-fallback>.site-header,.cd-fallback>.site-footer,.cd-fallback #game-back,.cd-fallback .play-heading{display:none}.cd-fallback .play-shell{max-width:1250px}.cd-fallback .play-panel{max-width:1200px;margin:auto}.cd-fallback :is(.staff-frame,.ng-staff,.theory-stage){max-width:950px}.cd-fallback .play-panel button{min-height:48px}.cd-fallback .play-panel :is(.multiple-answers,.ng-choice-grid,.theory-number-grid) button{font-size:1.25rem}.cd-fallback .play-panel svg{max-height:480px}
@media(min-width:1600px){.cd-stage{gap:22px 36px;padding-top:22px}.cd-choice-grid button{min-height:76px}.cd-controls button{font-size:1rem;min-height:52px}.cd-answers legend{font-size:1rem}}
@media(max-width:1050px){.cd-top{align-items:flex-start}.cd-top>div{gap:8px}.cd-top [data-cd-context]{max-width:220px}.cd-game-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.cd-launch-layout{grid-template-columns:minmax(0,1fr) 280px}.cd-launcher,.cd-launch-aside section{padding:20px}.cd-choice-grid button{min-height:54px}.cd-stage{gap:12px}.cd-top button{font-size:.75rem;padding:9px}}
@media(max-width:760px){.cd-launch-layout{grid-template-columns:1fr}.cd-game-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.cd-stage{grid-template-columns:1fr}.cd-stage>*{grid-column:1/-1}.cd-notation svg{height:260px}.cd-top{flex-wrap:wrap}.cd-top>div:first-child{flex:1;min-width:220px}.cd-top-actions{margin-left:auto}.cd-choice-grid{grid-template-columns:repeat(auto-fit,minmax(64px,1fr))}.cd-session-meta{gap:10px;font-size:.8rem}.cd-timer{width:100%;justify-content:center}.cd-controls button{font-size:.74rem;padding:9px;min-height:46px}.cd-custom-list{grid-template-columns:repeat(2,minmax(0,1fr))}.cd-team-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:400px){.cd-field-grid{grid-template-columns:1fr}.cd-game-grid{grid-template-columns:1fr}.cd-team-grid{grid-template-columns:1fr}.cd-top-actions{flex-wrap:wrap}.cd-top button{font-size:.7rem}.cd-rhythm-choices{grid-template-columns:1fr 1fr}.cd-hub-intro{flex-wrap:wrap}}
.cd-session.cd-reduced *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
@media(prefers-reduced-motion:reduce){.cd-session *{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
.cd-sequence{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:6px;margin:10px 0 16px}.cd-sequence span{min-height:52px;background:var(--cd-soft);border:1px solid var(--cd-border);border-radius:9px;display:grid;place-items:center;font-size:1.6rem;font-weight:850}.cd-sequence span.is-correct{background:#d9f5e6;color:#14513c}