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/* Original visual studies. The player has no source until a deliberate click. */
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.lesson-card{display:block;border:1px solid var(--line,#d8d7cc);background:#faf8f1;text-decoration:none;color:inherit;transition:transform .15s}
.lesson-card:hover{transform:translateY(-3px)}.lesson-poster{position:relative;overflow:hidden;background:#e5e6d9}.lesson-poster img{display:block;width:100%;height:auto;aspect-ratio:16/9;object-fit:cover}
.play-mark{position:absolute;right:12px;bottom:12px;background:#24372c;color:#f5f2e9;width:34px;height:34px;border-radius:50%;display:grid;place-items:center;font-size:12px}
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.remember-row{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin:20px 0;font:13px/1.6 var(--sans)}.remember-row label{display:flex;align-items:center;gap:8px}.remember-row input{width:16px;height:16px;accent-color:var(--moss)}.text-button{border:0;background:none;padding:8px 0;color:var(--moss);text-decoration:underline;text-underline-offset:3px;font-size:13px}.chapter-list{list-style:none;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.chapter-button{width:100%;padding:13px 12px;background:#f0eee4;border:1px solid #d8d7cc;text-align:left;color:#24372c;cursor:pointer;font:14px/1.5 var(--sans)}.chapter-button:hover{background:#e5e6d9}.chapter-button span{display:inline-block;font-variant-numeric:tabular-nums;min-width:56px;font-size:12px;color:#586653}.source-note{margin:30px 0;border-top:1px solid #d8d7cc;border-bottom:1px solid #d8d7cc;padding:18px 0}.source-note summary{cursor:pointer;font-weight:600}.source-note p,.source-note li{font-size:14px!important;overflow-wrap:anywhere}
@media(max-width:1100px){.nav .nav-tool{display:none}}
@media(max-width:780px){.shelf-rooms{grid-template-columns:1fr}.shelf-room{padding:24px}.shelf-room h2{font-size:30px}.lesson-grid{grid-template-columns:1fr}.lesson-card{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr)}.lesson-poster{display:flex;align-items:center}.lesson-card-copy{padding:18px}.lesson-card h3{font-size:28px}.lesson-card .card-bottom{margin-top:15px}.header-inner{flex-wrap:wrap}.nav{flex-basis:100%;justify-content:flex-start;gap:18px;flex-wrap:wrap}.lesson-layout{display:block}.hero{grid-template-columns:1fr}}
@media(max-width:420px){.lesson-card{display:block}.lesson-card-copy{padding:22px}.lesson-poster img{width:100%}.nav{gap:14px}.chapter-list{grid-template-columns:1fr}}