.activity-guide{border:1px solid #d5dfcb;border-radius:13px;background:#f4f7ed;margin:0 0 25px;color:#46633f;overflow:hidden}
.activity-guide>summary{display:flex;align-items:center;gap:15px;padding:20px 23px;list-style:none;cursor:pointer}
.activity-guide>summary::-webkit-details-marker{display:none}.activity-guide-icon{display:grid;place-items:center;flex-shrink:0;width:37px;height:37px;border-radius:50%;background:#dde9d3;color:#4b714c;font:600 20px/1 Manrope,sans-serif}
.activity-guide>summary>span:nth-child(2){display:grid;gap:5px;min-width:0}.activity-guide-label{display:block;font:600 10px/1.7 'DM Sans',sans-serif;letter-spacing:1.2px;color:#7e906e}
.activity-guide>summary strong{font:600 21px/1.5 Manrope,sans-serif;letter-spacing:-.4px;color:#3c5c42}
.activity-guide-toggle{margin-left:auto}.activity-guide-toggle:after{content:'＋';font-size:24px;color:#78946c}.activity-guide[open] .activity-guide-toggle:after{content:'−'}
.activity-guide-body{padding:0 23px 22px}.activity-guide-idea{font:18px/1.8 Georgia,serif;color:#4c6749;margin:0 0 21px;max-width:1020px}
.activity-guide-tabs{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;border-bottom:1px solid #d8e2ce;padding-bottom:16px;margin-bottom:23px}
.activity-guide-tabs button{font:500 16px/1.6 'DM Sans',sans-serif;padding:11px 14px;white-space:normal;border:1px solid #d1ddc5;border-radius:8px;background:#fffef7;color:#64795a;cursor:pointer}
.activity-guide-tabs button[aria-selected=true]{color:#fff;background:#4f7557;border-color:#4f7557}
.activity-guide-panel[hidden]{display:none!important}.activity-guide-panel{scroll-margin-top:88px;outline:none}
.activity-guide-panel h3{font:600 25px/1.4 Manrope,sans-serif;color:#3e6044;letter-spacing:-.5px;margin:0 0 16px}
.activity-guide-panel>p{font-size:18px;line-height:1.9;color:#64765c;margin:0 0 22px;max-width:1050px}
.activity-guide-steps{display:grid;gap:23px;list-style:none;margin:24px 0;padding:0}.activity-guide-steps>li{display:flex;gap:14px;align-items:flex-start}
.activity-guide-number{display:grid;place-items:center;flex-shrink:0;width:29px;height:29px;margin-top:3px;border:1px solid #cbd9bf;border-radius:8px;background:#fffef7;font:14px/1 'DM Sans',sans-serif;color:#5c7a52}
.activity-guide-steps h4,.activity-guide-terms h4,.activity-guide-map h4,.activity-guide-boundary h4,.activity-guide-sources h4{font:600 18px/1.6 Manrope,sans-serif;color:#4a6645;margin:0 0 7px}
.activity-guide-steps p{font-size:17px;line-height:1.9;color:#67785f;margin:0;max-width:1000px}
.activity-guide-watch{border-left:3px solid #a4bd90;padding:14px 17px;background:#eaf1df}.activity-guide-controls{margin:25px 0 0;border-top:1px solid #d9e3ce;padding-top:18px}
.activity-guide-controls>summary{font-size:17px;font-weight:600;color:#58764e;cursor:pointer}
.activity-guide-controls dl,.activity-guide-terms dl{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:19px 30px;margin:20px 0 0}
.activity-guide-controls dt,.activity-guide-terms dt{font:600 17px/1.7 'DM Sans',sans-serif;color:#4b6b43}
.activity-guide-controls dd,.activity-guide-terms dd{font:17px/1.85 'DM Sans',sans-serif;color:#718265;margin:5px 0 0}
.activity-guide-terms{padding-top:23px;border-top:1px solid #d9e3ce;margin-top:25px}.activity-guide-kind{display:inline-block;font-size:13px;line-height:1.7;padding:5px 11px;background:#e2ebd5;border-radius:6px;color:#688256;margin:0 0 14px}
.activity-guide-map{border-top:1px solid #d3dfc6;margin:27px 0}
.activity-guide-map>div{display:grid;grid-template-columns:minmax(180px,.8fr) minmax(0,1.8fr);gap:22px;border-bottom:1px solid #d3dfc6;padding:18px 0}
.activity-guide-map>div p{font-size:17px;line-height:1.85;color:#667a5a;margin:0}.activity-guide-map>div h4{font-size:17px;line-height:1.7;margin:0}
.activity-guide-map .activity-guide-map-head{padding:12px 0;color:#80946d;font-size:12px;letter-spacing:.4px}
.activity-guide-boundary{border-left:3px solid #c8b882;padding:5px 0 5px 18px;margin:26px 0}.activity-guide-boundary p{font:17px/1.85 'DM Sans',sans-serif;color:#728064;margin:0;max-width:1000px}
.activity-guide-sources{margin-top:25px}.activity-guide-sources h4{font-size:16px}.activity-guide-sources a{display:block;width:fit-content;font-size:15px;line-height:1.9;color:#7a774c;text-decoration:underline;text-underline-offset:4px;margin:8px 0;overflow-wrap:anywhere}
.activity-guide-experiment{font:18px/1.9 'DM Sans',sans-serif;color:#62775a;padding-left:25px;margin:0 0 25px}.activity-guide-experiment li{padding-left:5px;margin-bottom:12px}
.activity-guide-notes{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:21px;margin-top:23px}.activity-guide-notes label{display:block;font:16px/1.8 'DM Sans',sans-serif;color:#59764c}
.activity-guide-notes textarea{display:block;width:100%;font:17px/1.8 'DM Sans',sans-serif;color:#436540;border:1px solid #cad9be;border-radius:8px;background:#fffef8;padding:13px;margin-top:10px;resize:vertical}
.activity-guide-panel .activity-guide-note{font-size:14px;line-height:1.85;margin-top:17px;color:#7b8a6f}
.activity-guide-check{border-top:1px solid #d4e0c8;padding-top:25px;margin-top:27px}.activity-guide-check h4{font:600 20px/1.65 Manrope,sans-serif;color:#42663e;margin:10px 0 18px}
.activity-guide-answers{display:grid;gap:10px}.activity-guide-answers button{font:16px/1.85 'DM Sans',sans-serif;text-align:left;white-space:normal;padding:13px 16px}
.activity-guide-answers .activity-guide-correct{background:#dcebd0;border-color:#86a876;color:#426d3f}.activity-guide-answers .activity-guide-revisit{background:#f3e9d6;border-color:#cdbb89;color:#836e3f}
.activity-guide-feedback{font:17px/1.85 'DM Sans',sans-serif;color:#4c7142;background:#e5efd9;border-left:3px solid #96b37e;padding:15px;margin-top:19px}
.activity-guide-reading-actions{display:flex;flex-wrap:wrap;gap:12px}.activity-guide-reading-actions button{font-size:16px;padding:11px 15px}
.activity-guide-footer{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px;border-top:1px solid #d5e1c8;margin-top:25px;padding-top:20px}
.activity-guide-footer>span{font-size:14px;line-height:1.8;color:#859574}.activity-guide-footer button{font-size:16px;padding:11px 17px}
.activity-guide>summary:focus-visible,.activity-guide-tabs button:focus-visible,.activity-guide-answers button:focus-visible{outline:3px solid #a6be91;outline-offset:3px}
.study-sheet .activity-guide{margin:25px 0 0;background:#f4f3e9;border-color:#ded7c2}.study-sheet .activity-guide>summary{padding:18px}.study-sheet .activity-guide-label{color:#93805b}.study-sheet .activity-guide-idea{font-family:Georgia,serif}.study-sheet .activity-guide-tabs button[aria-selected=true]{background:#877442;border-color:#877442}.study-sheet .activity-guide-kind{background:#ebe4ca;color:#8d7743}
@media(max-width:650px){.activity-guide>summary{padding:17px 15px;gap:11px}.activity-guide-icon{width:31px;height:31px;font-size:17px}.activity-guide>summary strong{font-size:19px}.activity-guide-label{font-size:9px;letter-spacing:.7px}.activity-guide-body{padding:0 15px 18px}.activity-guide-idea{font-size:18px}.activity-guide-tabs{grid-template-columns:repeat(2,minmax(0,1fr));gap:7px;margin-bottom:20px}.activity-guide-tabs button{font-size:16px;padding:10px 9px}.activity-guide-panel h3{font-size:23px}.activity-guide-panel>p{font-size:17px}.activity-guide-steps{gap:22px}.activity-guide-steps>li{gap:11px}.activity-guide-steps h4{font-size:18px}.activity-guide-steps p{font-size:17px}.activity-guide-controls dl,.activity-guide-terms dl,.activity-guide-notes{grid-template-columns:1fr}.activity-guide-map>div{grid-template-columns:1fr;gap:7px;padding:17px 0}.activity-guide-map .activity-guide-map-head{display:none}.activity-guide-map>div h4{font-size:18px}.activity-guide-map>div p{font-size:17px}.activity-guide-footer button{width:100%}.activity-guide-footer>span{font-size:14px}.study-sheet .activity-guide>summary{padding:15px 12px}.study-sheet .activity-guide-body{padding:0 12px 16px}}
@media print{.activity-guide-tabs,.activity-guide-footer,.activity-guide-check,.activity-guide-notes{display:none!important}.activity-guide{border:0;background:none}.activity-guide-panel[hidden]{display:block!important}.activity-guide-panel{padding:20px 0;break-inside:auto}.activity-guide-panel h3{break-after:avoid}.activity-guide-map>div{break-inside:avoid}}

.study-source-list,.study-extension{scroll-margin-top:88px}
@media print{.study-sheet .activity-guide{display:none!important}}