/* Chapter navigation and the little nest-memory table. */
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@media(max-width:580px){.chapter-tabs{gap:8px}.chapter-tab{padding:11px}.chapter-tab strong{font-size:12px}.chapter-tab span{font-size:10px;line-height:1.5}.route-options{grid-template-columns:1fr;gap:14px}.route-options article{padding:20px;gap:13px}.route-options h2{font-size:24px}.route-options p{font-size:13px}.nest-routes>p{font-size:13px;padding-top:10px}.route-egg{width:80px;margin-right:12px}.path-station{gap:10px;padding:12px}.path-station>span{width:30px;height:30px;font-size:13px}.path-station h3{font-size:17px}.path-station small{font-size:10px}.path-station .back{padding:9px;font-size:11px}.memory-active>header{padding:5px 14px;min-height:42px}.memory-active .brand-icon{font-size:25px}.memory-active .brand{font-size:10px;gap:5px}.memory-active .brand strong{font-size:14px}.memory-active .star-total{font-size:11px;padding:4px 8px}.memory-active>main{padding:3px 12px 12px}.memory-top{gap:8px;margin:3px 0 8px;flex-wrap:wrap}.memory-top>.back{font-size:10px;padding:8px;min-height:36px}.memory-top h1{font-size:21px}.memory-top p{font-size:10px}.memory-errors{font-size:9px;padding:6px;max-width:80px}.memory-status{font-size:10px;margin:8px 2px}.memory-board{gap:7px;padding:9px;border-radius:17px}.memory-card{min-height:65px;border-radius:11px;gap:1px}.memory-card .drawn-icon{width:36px;height:36px}.card-back{width:42px;height:38px;border-radius:8px}.card-back .drawn-icon{width:27px;height:27px}.memory-card small{font-size:8px}.memory-board.pairs-5{gap:5px;padding:8px}.pairs-5 .memory-card{min-height:64px}.pairs-5 .memory-card .drawn-icon{width:31px;height:31px}.pairs-5 .card-back{width:34px;height:35px}.memory-feedback{font-size:11px;min-height:33px;margin:10px 2px 6px}.memory-math{padding:10px 12px 12px;border-radius:18px}.memory-math>p{font-size:10px}.memory-math .equation{font-size:35px;margin:7px 0;gap:8px;flex-wrap:nowrap}.memory-math .answer{height:48px;width:66px;font-size:33px;border-radius:13px}.memory-math>.primary{padding:7px 18px;min-height:36px;font-size:12px}.memory-math .keypad{margin-top:10px;gap:5px}.memory-math .keypad button{height:39px;min-height:39px;font-size:22px}.memory-footer{font-size:9px;margin:10px 0}.memory-permit{min-height:100px;padding:15px;font-size:15px}.memory-restart{padding:20px}.memory-restart p{font-size:12px}}
@media(prefers-reduced-motion:reduce){.memory-card{transition:none}}