:root{--bg:#f8f8f5;--paper:#fff;--ink:#202b27;--muted:#67716b;--line:#dde2db;--green:#345e49;--soft:#edf2ec;--red:#b04437;--radius:12px;font-size:16px}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}button{font:inherit;cursor:pointer;color:inherit}button:focus-visible,summary:focus-visible{outline:3px solid #86a597;outline-offset:3px}button:disabled{cursor:default;opacity:.45}p{font-size:16px;line-height:1.85;margin:12px 0;color:var(--ink)}h1,h2{letter-spacing:0;margin:0;font-weight:650}h1{font-size:28px;line-height:1.5}h2{font-size:19px;line-height:1.5}small{font-size:13px;line-height:1.6;color:var(--muted)}.app{max-width:900px;margin:auto;padding:24px 32px 100px}header{display:flex;align-items:center;justify-content:space-between;margin-bottom:40px;gap:12px}.brand{font-size:18px;font-weight:650;display:flex;align-items:center;gap:10px}.brand>span{background:var(--green);color:white;width:30px;height:30px;border-radius:7px;display:grid;place-items:center;font-family:serif}.badge{font-size:13px;color:var(--muted)}.page-heading{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:24px;gap:15px}.page-heading>span{font-size:14px;color:var(--muted)}.panel{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:24px}.sectiontitle{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}.scope-options{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.scope-option{background:white;border:1px solid var(--line);border-radius:9px;text-align:left;padding:14px 12px}.scope-option span{font-size:15px;font-weight:600}.scope-option small{display:block;margin-top:7px}.scope-option.chosen{background:var(--soft);border-color:#6b8c77}.scope-hint{font-size:13px;color:var(--muted);margin:16px 0 0}.start-row{display:flex;justify-content:space-between;align-items:center;gap:20px;margin:20px 0 40px}.start-row>span{font-size:14px;color:var(--muted)}.primary,.secondary{border:0;border-radius:9px;min-height:48px;padding:12px 24px;font-size:16px;font-weight:600}.primary{background:var(--green);color:white}.primary:hover{background:#294c3a}.secondary{background:#e9ede6;color:#405c49}.wide{width:100%}.catalog{border-top:1px solid var(--line);padding-top:24px}.catalog>h2{margin-bottom:16px}.catalog-unit{border-bottom:1px solid var(--line)}summary{cursor:pointer;line-height:1.7}.catalog-unit summary{display:flex;justify-content:space-between;padding:20px 0;font-size:16px;gap:14px}.catalog-unit summary:after{content:'+';color:var(--muted)}.catalog-unit[open] summary:after{content:'−'}.catalog-unit summary small{margin-left:auto;white-space:nowrap}.catalog-concepts{display:flex;flex-wrap:wrap;gap:10px;padding-bottom:22px}.catalog-term{background:white;border:1px solid var(--line);border-radius:7px;font-size:15px;padding:10px 13px;min-height:44px}.record-row{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding:18px 0;gap:20px}.record-row strong{font-size:16px;font-weight:600}.record-row small{display:block;margin-top:4px}.record-row p{font-size:14px;color:var(--muted);margin:5px 0}.record-row>span{font-size:14px;white-space:nowrap}.empty-text{color:var(--muted)}nav{position:fixed;bottom:0;left:0;right:0;display:flex;justify-content:center;gap:80px;border-top:1px solid var(--line);background:#fcfcfaee;backdrop-filter:blur(14px);padding:12px 12px max(12px,env(safe-area-inset-bottom));z-index:10}nav button{background:none;border:0;color:var(--muted);display:grid;gap:5px;font-size:12px;min-width:56px}nav em{font-size:19px;font-style:normal}nav button.active{color:var(--green);font-weight:650}.quiz{max-width:660px;margin:auto}.quiztop{display:flex;align-items:center;gap:16px;margin-bottom:28px}.close{background:none;border:0;font-size:26px;color:var(--muted);width:40px;height:40px;padding:0}.bar{height:5px;border-radius:5px;background:#e4e8e0;flex:1;overflow:hidden}.bar i{display:block;background:#708c72;height:100%;border-radius:5px}.question-type{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:18px}.question-type strong{font-size:14px;font-weight:650;color:var(--green);background:#e7efe7;border-radius:5px;padding:5px 9px}.question-type.multi strong{background:#f4e9d5;color:#845e23}.question-type span{font-size:13px;color:var(--muted)}.quiz .question{font-size:22px;line-height:1.65;font-weight:600;margin:0 0 26px}.options{display:grid;gap:12px}.option{width:100%;font-size:17px;line-height:1.8;padding:16px 18px;background:white;border:1.5px solid var(--line);border-radius:10px;text-align:left;transition:background .12s,border-color .12s}.option:hover:not(:disabled){border-color:#8da291}.option.selected{background:var(--soft);border-color:var(--green)}.option.correct{background:#edf4e9;border-color:#78986a}.option.wrong{background:#fcf0eb;border-color:#c47e6c}.option:disabled,.wire-node:disabled{opacity:1}.interaction-caption{font-size:13px;color:var(--muted);margin:0 0 6px}.quizfooter{display:flex;justify-content:flex-end;margin-top:28px}.feedback{margin-top:28px;padding-top:24px;border-top:1px solid var(--line);font-size:16px;line-height:1.85}.feedback>b{font-size:17px;color:var(--green)}.feedback.bad>b{color:var(--red)}.feedback .contrast{color:#4b5650;font-size:15px;line-height:1.9;margin-top:18px}.tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}.tags span{font-size:12px;line-height:1.6;color:var(--muted);background:#ecefe8;border-radius:4px;padding:4px 7px}.framework{margin-top:24px;background:#f0f3ec;border-radius:10px;padding:20px}.framework>b{font-size:16px}.framework>p{font-size:13px;color:var(--muted);margin-bottom:0}.time-axis{list-style:none;padding:0 0 0 10px;margin:20px 0 0}.time-axis li{border-left:2px solid #a7b8a1;position:relative;padding:0 0 24px 23px}.time-axis li:before{content:'';position:absolute;width:9px;height:9px;background:#698768;border-radius:50%;left:-5.5px;top:7px}.time-axis li:last-child{padding-bottom:0;border-color:transparent}.time-axis small,.time-axis strong{display:block}.time-axis strong{font-size:16px;font-weight:600;margin-top:5px;line-height:1.8}.table-scroll{overflow-x:auto;margin-top:16px}table{border-collapse:collapse;width:100%;font-size:15px;line-height:1.85}th,td{text-align:left;padding:14px 10px;border-bottom:1px solid #d7dfd1;min-width:100px;vertical-align:top}th{font-weight:600}thead{background:#e6ecdf}.cause-chain{display:grid;gap:9px;text-align:center;margin-top:18px}.cause-chain span{background:#fff;padding:13px;border-radius:7px;font-size:15px;line-height:1.8}.cause-chain i{font-style:normal;color:#6f8369}.branch-root{background:white;padding:12px;border-radius:8px;text-align:center;margin:16px 0}.branches{display:grid;grid-template-columns:1fr 1fr;gap:20px;text-align:center}.branch-node{padding:12px;background:white;border-radius:8px;margin:8px 0}.term{font:inherit;line-height:inherit;color:#315b46;background:none;border:0;border-bottom:1px dashed #809884;padding:0;cursor:pointer;text-align:inherit}.term:hover{background:#e7eee2}.eyebrow{font-size:13px;color:var(--muted);letter-spacing:0}.concept-dialog{width:calc(100% - 32px);max-width:500px;max-height:85vh;overflow:auto;border:0;border-radius:16px;background:#fff;padding:28px;color:var(--ink);box-shadow:0 20px 80px #152d2429}.concept-dialog::backdrop{background:#182c245e;backdrop-filter:blur(3px)}.concept-close{float:right;border:0;background:none;font-size:26px;color:var(--muted);width:36px;height:36px}.concept-dialog h2{font-size:26px;line-height:1.6;margin:15px 0 8px}.concept-era{font-size:14px;color:var(--muted)}.concept-dialog>p{font-size:17px;line-height:1.9;margin:22px 0}.tip{background:#edf1e8;border-radius:9px;padding:18px}.tip>b{font-size:15px}.tip p{font-size:15px;line-height:1.9;margin-bottom:0}.concept-dialog .tip{margin-top:22px}ruby.reading{ruby-position:over;ruby-align:center}ruby.reading rt{font-size:10px;font-weight:400;color:#63755f;line-height:1.2}.question ruby.reading rt,.concept-dialog h2 ruby.reading rt{font-size:11px}.sort-row{display:flex;align-items:center;gap:12px;border:1px solid var(--line);background:white;border-radius:9px;padding:10px 12px;margin:10px 0;position:relative}.sort-number{font-size:13px;color:var(--muted)}.sort-label{flex:1;font-size:16px;line-height:1.8}.sort-handle{touch-action:none;user-select:none;background:#edf1e8;border:0;border-radius:7px;min-width:44px;min-height:44px;font-size:25px;color:#5e785a;cursor:grab}.sort-row.dragging{z-index:3;box-shadow:0 10px 25px #254b382b;border-color:#6a965b;pointer-events:none}.sort-row.drop-target{border:2px dashed #709660;background:#eef5e7}.wireboard{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:52px;margin:6px 0 12px}.wire-col{display:grid;grid-auto-rows:minmax(100px,auto);gap:22px}.wire-node{position:relative;z-index:1;border:1.5px solid #d1dad0;border-radius:10px;background:white;color:var(--ink);padding:16px 12px;font-size:16px;line-height:1.65;text-align:center;min-width:0;touch-action:none;user-select:none;-webkit-user-select:none;transition:background .12s,border-color .12s,box-shadow .12s}.wire-node.selected{background:#e7eee4;border-color:var(--green);box-shadow:0 0 0 2px #d6e1d2}.wire-node.connected{border-color:#8eaa96}.wire-node.target{background:#dfead9;border-color:var(--green);box-shadow:0 0 0 3px #d8e3d2}.wire-node.wire-wrong{border-color:#c47e6c}.wire-node small{font-size:12px;display:block;color:var(--red);margin-top:5px}.port{position:absolute;width:10px;height:10px;border-radius:50%;background:#719481;top:calc(50% - 5px);pointer-events:none}.wire-left .port{right:-6px}.wire-right .port{left:-6px}.wireboard svg{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;overflow:visible}.wire-tools{display:flex;justify-content:space-between;align-items:center}.wire-tools span{font-size:13px;color:var(--muted)}.text-button{border:0;background:none;padding:10px 0;font-size:14px;color:var(--muted)}.text-button:disabled{opacity:.4}.notice{font-size:13px;color:var(--muted);line-height:1.7;margin-top:22px}.unit{display:flex;gap:15px;align-items:start;margin:20px 0}.unitnum{font-size:12px;color:var(--muted)}.unit b{font-size:16px}.unit small{display:block;margin-top:6px}.quiz>details{background:white}.quiz>h1{margin:18px 0}.quiz>p{color:var(--muted)}
@media(max-width:700px){.app{padding:20px 20px 96px}header{margin-bottom:30px}.brand{font-size:17px}.badge{font-size:12px}.page-heading h1{font-size:26px}.page-heading>span{font-size:13px}.panel{padding:20px}.scope-options{grid-template-columns:1fr 1fr}.scope-option{padding:13px 11px}.scope-option span{font-size:15px}.scope-option small{font-size:12px}.catalog-unit summary{font-size:15px}.catalog-unit summary small{font-size:12px}.quiz .question{font-size:21px;line-height:1.7}.option{font-size:16px;padding:16px}.wireboard{gap:38px}.wire-node{font-size:15px;padding:14px 9px;line-height:1.75}.wire-col{grid-auto-rows:minmax(106px,auto);gap:20px}.framework{padding:18px 15px}table{font-size:14px}th,td{padding:12px 8px}.concept-dialog{padding:25px}.concept-dialog>p{font-size:16px}nav{gap:60px}.start-row{margin-bottom:34px}.feedback{font-size:16px}}