.lesson-entry{background:var(--green);color:#fff6df}
.lesson-dialog[open]{display:grid;grid-template-columns:38% 62%;width:min(1160px,95vw);height:min(800px,92dvh);max-height:92dvh;overflow:hidden}
.lesson-media{min-width:0;background:#e6e1d4;position:relative;display:flex;align-items:center;justify-content:center;padding:32px 24px 60px}
.lesson-media img{width:100%;height:100%;object-fit:contain}.lesson-media.person{background:linear-gradient(145deg,#ece9df,#d8ddd1)}.lesson-media.person img{visibility:hidden}.lesson-media>p{position:absolute;bottom:16px;text-align:center;font-size:13px;letter-spacing:3px;color:#75806d}
.lesson-content{min-width:0;padding:42px 38px 24px;overflow:auto;display:flex;flex-direction:column}
.lesson-steps{display:flex;gap:5px;flex-wrap:wrap;margin:0 24px 16px 0}.lesson-steps button{padding:8px 10px;font-size:13px;border-radius:5px;background:#e9ecdf;color:#64735b}.lesson-steps button[aria-current=step]{background:var(--green);color:#fff7df}
.lesson-content h2{font-size:29px;margin:6px 0 18px}.lesson-text{font-size:17px;line-height:2;margin:0 0 18px}.lesson-question{font-size:15px;line-height:1.9;padding:14px 17px;background:#e9edde;border-left:2px solid #a28b5b;margin:0 0 22px}
.lesson-source,.art-fact a{font-size:12px;line-height:1.8;color:#5c7660}.lesson-footer{margin-top:auto;padding-top:25px;display:flex;gap:12px;align-items:center;justify-content:space-between}.lesson-footer>button:first-child{background:none;font-size:14px;padding:12px 0}.lesson-footer>span{font-size:12px;color:#849075}.lesson-footer .primary-button{font-size:14px;padding:12px 18px}
.lesson-note{font-size:13px;line-height:1.85;color:#7b816d;margin:14px 0}.mission-lead{font-size:16px;line-height:1.8;color:#657754;margin:0 0 15px}.mission-actions{padding-left:22px;font-size:15px;line-height:1.9}
.solar-terms{display:grid;gap:5px}.solar-terms>div{display:grid;grid-template-columns:24px repeat(6,1fr);gap:3px;align-items:center;font-size:13px}.solar-terms strong{color:#506749;font-weight:500}.solar-terms span{padding:9px 2px;text-align:center;background:#e7ecdd;border-radius:3px;white-space:nowrap}.solar-terms>div:nth-child(2) span{background:#f0e8d8}.solar-terms>div:nth-child(3) span{background:#eee2d2}.solar-terms>div:nth-child(4) span{background:#e3e9e6}
.comparison-table{border:1px solid var(--line);margin-top:18px;border-radius:6px;overflow:hidden}.comparison-table>div{display:grid;grid-template-columns:20% 40% 40%;border-top:1px solid var(--line)}.comparison-table>div:first-child{border:0;background:#e3e9da}.comparison-table span,.comparison-table strong{font-size:14px;font-weight:400;padding:12px 10px;line-height:1.7;border-right:1px solid var(--line)}.comparison-table span:last-child,.comparison-table strong:last-child{border-right:0}
.art-fact{padding:15px 17px;margin:0 0 22px;background:#edf0e5;border-radius:5px}.art-fact strong{font-size:13px;font-weight:500;color:#75805e}.art-fact p{font-size:15px;line-height:1.9;margin:8px 0}
.ai-note{margin-top:16px;padding:15px 17px;border:1px solid #c9b27c;border-left:4px solid #9f7a35;border-radius:6px;background:linear-gradient(135deg,#173a31,#244a3e);color:#f7edcf;box-shadow:0 10px 24px rgba(23,48,41,.13)}.ai-note strong{font-size:14px;letter-spacing:.08em;color:#f0d595}.ai-note p{margin:8px 0 0;font-size:13px;line-height:1.8;color:#eef0e6}
.guide-speech{max-height:42dvh;overflow:auto}.wall-tab{padding-left:12px;padding-right:12px}
#lessonComparison[hidden],#lessonAnswer[hidden],#lessonMission[hidden],#lessonQuestion[hidden],#lessonSource[hidden],#artFactBox[hidden]{display:none}
@media(max-width:800px){.lesson-dialog[open]{grid-template-columns:1fr;grid-template-rows:24dvh auto;height:94dvh;max-height:94dvh;overflow:auto}.lesson-media{padding:14px 20px 30px}.lesson-media>p{bottom:2px;font-size:11px}.lesson-content{padding:22px 20px;overflow:visible}.lesson-content h2{font-size:24px}.lesson-text{font-size:16px}.lesson-steps{margin:0 0 15px;gap:4px}.lesson-steps button{font-size:12px;padding:7px 9px}.lesson-footer{margin-top:18px;gap:8px}.lesson-footer .primary-button{font-size:13px;padding:11px 13px}.solar-terms>div{font-size:12px;grid-template-columns:20px repeat(6,1fr);gap:2px}.comparison-table span,.comparison-table strong{font-size:13px;padding:9px 6px}.top-actions{flex-wrap:wrap;justify-content:flex-end;max-width:150px}.top-actions .text-button{font-size:12px;padding:0 10px}.top-actions #helpBtn{display:none}.brand h1{font-size:15px;letter-spacing:1px}.wall-tab{padding:9px 3px;font-size:11px}.wall-tab span{font-size:10px}.guide-speech{max-height:46dvh}}