@charset "UTF-8";
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315px;min-height:0;flex:1}.workspace{background:#f0f2eb;min-height:0;display:flex;flex-direction:column;overflow:hidden}.workspace-toolbar{display:flex;justify-content:space-between;align-items:center;padding:12px 18px;gap:8px;flex-shrink:0}.drawing-tools,.zoom-tools{display:flex;gap:3px;align-items:center}.tool-button{width:29px;height:29px;border-radius:5px;display:flex;align-items:center;justify-content:center;color:#7c8b6d}.tool-button svg{width:16px;height:16px}.tool-button:hover,.tool-button.active{background:#fff;color:#36562e}.tool-button.active{box-shadow:0 1px 3px #3040260d}.tool-divider{height:17px;width:1px;background:#d9e0d0;margin:0 5px}.color-button{background:#db554b;border:3px solid #f0f2eb;width:17px;height:17px;border-radius:50%;margin:0 2px;padding:0}.color-button.blue{background:#387ab0}.color-button.black{background:#293b33}.color-button.active{outline:1px solid 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button[aria-selected="true"]{background:#fff;border-color:#dfe5d6;color:#48623a}.workspace-footer{font-size:9px;display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 20px;color:#96a28a;flex-shrink:0;border-top:1px solid #e3e8db}.workspace-footer a{display:flex;gap:5px;align-items:center;text-decoration:none;white-space:nowrap;color:#718564}.workspace-footer svg{width:12px;height:12px}.errata-notice{font-size:10px;color:#927d4e;background:#fbf3df;padding:8px 20px;display:flex;gap:12px;align-items:center;justify-content:space-between}.errata-notice button{font-size:10px;color:#896735;text-decoration:underline;text-underline-offset:2px;white-space:nowrap}.answer-panel{border-left:1px solid var(--line);display:flex;flex-direction:column;min-height:0;background:#fff}.answer-panel-scroll{padding:24px 24px;overflow-y:auto;flex:1}.answer-panel-title{display:flex;align-items:center;justify-content:space-between;gap:6px;margin-bottom:25px}.answer-panel-title h3{font-weight:600;font-size:12px;letter-spacing:.2px;margin:0}.status-select select{font-size:9px;padding:4px 2px 4px 6px;border:1px solid #e1e7d9;background:#f7f9f2;color:#81936d;border-radius:5px;max-width:84px}.field-label{display:flex;align-items:center;justify-content:space-between;font-size:10px;font-weight:600;letter-spacing:.3px;margin-bottom:8px;color:#728268}.field-label>span{font-size:8px;font-weight:400;color:#a6af9b}.answer-input{width:100%;background:#fafbf7;border:1px solid #dce4d2;color:#31492c;border-radius:7px;padding:11px 12px;font-size:15px;letter-spacing:1px}.answer-input::placeholder{font-size:11px;letter-spacing:0;color:#bac2ae}.check-answer{width:100%;margin-top:10px;font-size:11px;padding:10px}.answer-helper{font-size:8px;color:#a2ad95;line-height:1.8;margin:6px 0 0}.answer-feedback{font-size:11px;line-height:1.8;min-height:0;margin:0}.answer-feedback:not(:empty){padding:10px 11px;border-radius:6px;background:#f6f2e7;color:#99804b;margin-top:10px}.answer-feedback.correct{background:#edf4e8;color:#4e7840}.note-field{margin:25px 0 24px}.note-field textarea{width:100%;min-height:130px;resize:vertical;border:1px solid #e2e8d9;border-radius:7px;background:#fafbf7;padding:11px 12px;font-size:11px;color:#566b49;line-height:1.9}.note-field textarea::placeholder{color:#afb8a3;font-size:10px}.hint-section{border-top:1px solid var(--line);padding-top:19px}.hint-section h4{display:flex;align-items:center;gap:7px;font-size:10px;font-weight:500;color:#81936f;margin:0 0 12px}.hint-section h4 svg{width:15px;height:15px;color:#a9b19c}.hint-button{display:flex;justify-content:space-between;align-items:center;font-size:10px;border:1px solid var(--line);border-radius:7px;width:100%;padding:10px 12px;text-align:left;color:#859575}.hint-button svg{width:13px;height:13px;color:#a1af94}.hint-content{font-size:11px;line-height:1.9;color:#75866a}.hint-block{margin:0 0 12px;padding:12px;background:#f5f6ec;border-radius:7px;white-space:pre-wrap}.hint-block strong{display:block;letter-spacing:1px;font-size:9px;color:#9d9e78;margin-bottom:5px}.hint-block img,.solution-content img{width:100%;height:auto;margin-top:10px;border:1px solid var(--line);border-radius:5px}.solution-details{font-size:9px;color:#a0a991;margin-top:15px}.solution-details>summary{cursor:pointer;padding:5px 0;text-decoration:underline;text-underline-offset:3px}.solution-details .button{font-size:10px;width:100%;padding:8px 10px}.spoiler-note{font-size:9px;line-height:1.9;color:#a29678}.solution-content{font-size:11px;line-height:1.9;color:#75866a;white-space:pre-wrap;margin-top:12px}.solution-answer{display:block;color:#47633b;font-size:17px;letter-spacing:1px;background:#edf2e7;padding:10px 13px;border-radius:6px;margin:8px 0 12px}.related-section{border-top:1px solid var(--line);margin-top:25px;padding-top:18px}.related-section .eyebrow{font-size:7px}.related-section button{display:flex;align-items:center;justify-content:space-between;width:100%;font-size:10px;text-align:left;color:#7d916c;padding:8px 0}.related-section button svg{width:13px;height:13px}.answer-panel-bottom{font-size:8px;color:#9fab91;padding:12px 20px;background:#fafbf6;border-top:1px solid var(--line)}.small-dialog{border:1px solid #e1e5d7;border-radius:17px;width:min(540px,calc(100vw - 32px));max-height:calc(100dvh - 40px);padding:36px;color:var(--ink);box-shadow:0 20px 80px #12241530}.dialog-close{position:absolute;top:12px;right:12px}.small-dialog h2{font-family:"Yu Mincho",Georgia,serif;font-size:25px;font-weight:500;letter-spacing:.6px;margin:9px 0 27px}.guide-steps{padding-left:23px;font-size:12px}.guide-steps li{padding-left:6px;margin:0 0 22px}.guide-steps li::marker{color:#b4a174;font-family:Georgia,serif}.guide-steps strong{font-weight:600;color:#617850}.guide-steps p{font-size:11px;color:#98a18b;line-height:1.9;margin:7px 0 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