.activity-tabs,.extension-shortcuts,.sentence-tiles,.sentence-answer,.actions{display:flex;gap:12px;flex-wrap:wrap}.extension-shortcuts{margin-top:20px}.activity-intro{margin-top:20px}.activity-intro h2{margin-top:12px}.activity-intro .actions{margin-top:20px}.activity-preview{display:flex;gap:14px;align-items:center;padding:16px 0;border-top:1px solid var(--line)}.activity-preview .quiet{margin-left:auto;white-space:nowrap}.activity-prompt{font-size:27px;margin:25px 0;line-height:1.7}.sentence-answer{min-height:100px;align-items:center;justify-content:center;border:2px dashed #bed8d0;border-radius:18px;padding:20px;margin:24px 0}.sentence-tiles{justify-content:center;margin:24px 0}.word-tile,.chosen-tile{font:600 24px/1.3 Arial,sans-serif;min-height:52px;padding:12px 17px;border-radius:12px;background:#e9f4ee;color:#194d44;border:1px solid #bfd7cd}.word-tile:disabled{visibility:hidden}.chosen-tile{background:#173f40;color:white}.activity-study{max-width:1100px}.activity-study .actions{justify-content:center}.activity-typing{font:25px/1.8 Arial,sans-serif;width:100%;min-height:64px;max-width:900px;margin:15px 0;letter-spacing:.4px}.activity-feedback{text-align:left;margin-top:28px}.activity-feedback:empty{display:none}.activity-feedback>p{margin:14px 0}.sentence-diff{font:25px/1.8 Arial,sans-serif;background:#f6f9f7;border-radius:12px;padding:18px;overflow-wrap:anywhere}.sentence-diff small{display:block;font:14px/1.6 "Microsoft YaHei",sans-serif}.token-right{color:#216b53}.token-review{color:#a24f2e;background:#fff0dc;border-radius:5px;padding:1px 4px}.sentence-analysis{display:flex;gap:14px;flex-wrap:wrap;padding:24px 0}.sentence-analysis>div{display:flex;flex-direction:column;gap:8px;border-bottom:3px solid #84b9a7;min-width:95px;padding:8px}.sentence-analysis b{font:22px/1.4 Arial,sans-serif}.sentence-analysis small{font-size:13px;color:#617978}.activity-explanation{background:#eef6f2;border-radius:12px;padding:18px;line-height:1.9}.reading-passage{text-align:left;background:#f0f6f3;border-left:4px solid var(--teal);padding:20px 25px;border-radius:12px;font:21px/1.9 Arial,sans-serif;margin-top:20px}.reading-passage details{font:14px/1.8 "Microsoft YaHei",sans-serif}.reading-passage button{font-size:13px;margin:8px 4px 0 0;min-height:38px;padding:8px 12px}.badge-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.growth-badge,.theme-card{text-align:center;padding:24px 15px;border:1px solid var(--line);border-radius:14px;background:#f2f5f4}.growth-badge>span{font-size:42px;display:block;color:#91a5a0;margin-bottom:10px}.growth-badge.earned{background:#fff5dc;border-color:#ead49f}.growth-badge.earned>span{color:#b28125}.growth-badge p,.growth-badge small,.theme-card p{font-size:12px;color:#617978}.theme-card .quiet{margin-top:18px}.theme-card.forest{background:#e0f1e7}.theme-card.night{background:#e8ecfb}.theme-card.sunrise{background:#fff0dd}.family-picker{max-width:100%;padding:15px 24px}.family-picker label{margin-top:0}.family-picker select{width:min(100%,480px)}.sidebar-shortcuts{display:grid;grid-template-columns:1fr 1fr;gap:6px;padding-top:18px;margin-top:12px;border-top:1px solid var(--line)}.sidebar-shortcuts button{padding:9px 4px;font-size:12px;min-height:40px;border-radius:8px;color:#526d6b;background:#f3f7f5}.extension-summary{margin-top:20px}.extension-summary .history{min-width:600px}.rest-clock{font:60px/1.6 Arial,sans-serif;color:var(--teal);text-align:center;padding:25px}.authoring-table{width:100%;border-collapse:collapse}.authoring-table td{padding:7px;border-bottom:1px solid var(--line)}.authoring-table input{width:100%;min-width:110px}.authoring-table input[readonly]{min-width:130px}.form textarea{font:14px/1.7 "Microsoft YaHei",sans-serif;width:100%;border:1px solid #d7e3e2;padding:12px;border-radius:10px;color:var(--ink);resize:vertical}.study-setting-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.study-setting-grid label{margin-top:8px}.sync-notice{padding:10px 15px;background:#fff1d6;border-radius:10px;color:#715321;font-size:13px;margin:12px 0}
:root[data-study-theme=forest]{--bg:#edf5ee;--navy:#1c4a34;--teal:#28744d;--mint:#d7ecda}:root[data-study-theme=night]{--bg:#eef0fa;--navy:#303765;--teal:#5b65a3;--mint:#e3e6f5}:root[data-study-theme=sunrise]{--bg:#fff5e9;--navy:#62472a;--teal:#a16c30;--mint:#f4e6ce}
@media(max-width:950px){.badge-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.activity-preview{flex-wrap:wrap}.sentence-analysis{gap:8px}.activity-prompt{font-size:24px}}@media(max-width:650px){.activity-study{padding:16px 14px}.activity-typing{font-size:20px}.reading-passage{font-size:18px;padding:15px}.word-tile,.chosen-tile{font-size:20px;padding:10px 13px}.sentence-answer{min-height:88px;padding:12px}.study-setting-grid{grid-template-columns:1fr}.activity-study .study-header{flex-wrap:wrap}.activity-study .question{padding:20px 15px}.sidebar-shortcuts{display:flex;border-top:0;padding:0;margin:0;flex-wrap:wrap;justify-content:center}.sidebar-shortcuts button{padding:8px}.family-picker{padding:15px}.extension-shortcuts .quiet{flex:1 1 45%;padding:10px;font-size:13px}.sentence-diff{font-size:21px}}