@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@400;500;600;700;800&display=swap');
:root{--ink:#000000;--muted:#60605B;--line:#D5D5CC;--accent:#174D38;--wash:#EAF1EC;--paper:#F6F6F3}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.8 'Noto Sans KR',sans-serif;letter-spacing:-.03em}a{color:inherit;text-decoration:none}button,input,textarea{font:inherit;color:inherit}button{cursor:pointer}button,a,input,textarea{outline-offset:5px}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--accent)}h1,h2,h3,p{margin:0}#sidebar{display:none}#topbar{max-width:1180px;margin:auto;padding:26px 28px;display:flex;align-items:center;justify-content:space-between;gap:24px;border-bottom:1px solid var(--line)}.wordmark{font:800 29px/1 Arial,sans-serif;letter-spacing:-1.2px;white-space:nowrap}.wordmark span{color:var(--accent)}.wordmark sup{font-size:9px;vertical-align:top;margin-left:3px}nav{display:flex;gap:28px;font-size:14px}nav a.active{color:var(--accent);font-weight:700}main{max-width:1180px;margin:auto;padding:40px 28px 72px;min-height:75vh}main:focus{outline:0}.eyebrow{display:block;font-size:12px;letter-spacing:.08em;color:var(--accent);font-weight:600;margin-bottom:10px}.intro h1{font-size:30px;letter-spacing:-.06em;line-height:1.4}.intro p:last-child{color:var(--muted);margin-top:8px;font-size:15px}.search{display:flex;gap:12px;align-items:center;border-bottom:1px solid #8B8B83;padding:12px 0;margin:22px 0 26px}.search>span{font-size:26px;line-height:1}.search input{border:0;background:transparent;padding:5px 0;min-width:0;width:100%;font-size:16px;outline:none}.search:focus-within{border-color:var(--accent);box-shadow:0 1px var(--accent)}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.concept-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:6px;padding:24px;min-height:240px;display:flex;flex-direction:column;transition:border-color .2s,transform .2s}.concept-card:hover{border-color:var(--accent);transform:translateY(-2px)}.card-number{font:12px Arial;color:var(--accent);margin-bottom:25px}.concept-card h2{font-size:20px;line-height:1.55;letter-spacing:-.05em;word-break:keep-all;padding-right:6px}.concept-card p{color:var(--muted);font-size:14px;line-height:1.7;margin:10px 0 23px;word-break:keep-all}.card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--accent);border-top:1px solid #E7E7E0;padding-top:14px}.card-foot>span:last-child{font-size:18px}footer{max-width:1124px;margin:0 auto;padding:24px 0;border-top:1px solid var(--line);display:flex;gap:20px;justify-content:space-between;font-size:12px;color:var(--muted)}footer span:first-child{font-weight:700;color:var(--ink)}.skip{position:fixed;top:-100px;z-index:10;background:var(--ink);color:white;padding:12px}.skip:focus{top:0}.back{display:inline-block;color:var(--muted);font-size:14px;margin-bottom:25px}.concept-heading{max-width:800px;margin:10px auto 36px}.concept-heading h1{font-size:38px;line-height:1.45;letter-spacing:-.055em;word-break:keep-all}.reading{max-width:760px;margin:auto}.reading h2{font-size:20px;margin:26px 0 20px}.reading>p{font-size:17px;line-height:2;word-break:keep-all;margin-bottom:20px}.example{margin:42px 0;padding:28px 32px;background:var(--wash);border-left:3px solid var(--accent);border-radius:0 6px 6px 0}.example h2{font:700 28px Arial;margin:14px 0 20px}.example p{font-size:16px;line-height:1.9;margin-top:16px}
@media(max-width:850px){.grid{grid-template-columns:repeat(2,minmax(0,1fr))}footer{margin:0 28px}.concept-card{min-height:225px}.concept-heading h1{font-size:32px}}
@media(max-width:520px){#topbar{padding:23px 20px;gap:15px}.wordmark{font-size:25px}nav{gap:13px;font-size:12px}main{padding:28px 20px 50px}.intro h1{font-size:25px}.intro p:last-child{font-size:14px}.intro .eyebrow{font-size:12px}.grid{gap:10px}.concept-card{padding:18px 14px;min-height:240px}.concept-card h2{font-size:18px;line-height:1.6}.concept-card p{font-size:14px;margin-bottom:18px}.card-number{margin-bottom:21px}.card-foot{font-size:12px;align-items:flex-end;gap:5px}.concept-heading h1{font-size:30px}.reading>p{font-size:16px}.example{padding:23px}.example p{font-size:16px}footer{margin:0 20px;flex-wrap:wrap;gap:10px}}
.card-wrap{position:relative;min-width:0}.card-wrap .concept-card{height:100%}.bookmark{position:absolute;right:12px;top:12px;width:40px;height:40px;border:0;border-radius:50%;background:transparent;color:var(--muted);font:24px Arial}.bookmark:hover,.bookmark[aria-pressed=true]{background:var(--wash);color:var(--accent)}.search-row{display:flex;align-items:center;gap:25px}.search-row .search{flex:1;min-width:0}.saved-filter{border:0;background:transparent;font-size:14px;white-space:nowrap;color:var(--muted)}.saved-filter[aria-pressed=true]{color:var(--accent)}.saved-filter b{font-size:12px;margin-left:5px}.result-bar{display:flex;justify-content:space-between;gap:15px;margin-bottom:14px;font-size:12px;color:var(--muted)}.result-bar a{color:var(--accent);text-decoration:underline}.grid-bottom{text-align:center;margin:38px 0 5px;color:var(--muted);font-size:14px}.grid-bottom a{display:inline-block;margin-top:8px}.text-link{color:var(--accent);font-size:14px;text-underline-offset:4px}.text-link:hover{text-decoration:underline}.btn{display:inline-flex;justify-content:center;align-items:center;gap:6px;padding:10px 15px;border:1px solid var(--line);border-radius:5px;background:#fff;font-size:14px;line-height:1.6}.btn:hover{border-color:var(--accent)}.btn.primary{color:#fff;background:var(--accent);border-color:var(--accent)}.btn:disabled{cursor:default;opacity:.45}.btn[aria-pressed=true]{color:var(--accent);background:var(--wash)}.breadcrumbs{display:flex;flex-wrap:wrap;gap:12px;color:var(--muted);font-size:13px;margin-bottom:25px}.breadcrumbs a:hover{color:var(--accent)}.concept-heading{max-width:760px}.heading-meta{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:17px}.heading-meta .eyebrow{margin:0;letter-spacing:0}.heading-summary{color:var(--muted);margin-top:13px;font-size:16px}.save-detail{flex-shrink:0}.section-label{display:flex;align-items:center;gap:10px;margin-bottom:20px}.section-label>span{width:28px;height:28px;display:grid;place-items:center;background:var(--wash);color:var(--accent);font:12px Arial;border-radius:50%}.reading .section-label h2{margin:0;font-size:20px}.section-label small{margin-left:auto;color:var(--muted);font-size:12px;white-space:nowrap}.body-copy p{font-size:17px;line-height:2;margin-bottom:20px;word-break:keep-all;overflow-wrap:anywhere}.example h3{font-size:28px;line-height:1.4;margin:24px 0}.small-label{font-size:12px;color:var(--accent);display:block;font-weight:600}.example .section-label>span{background:white}.example .small-label+p{margin-top:5px}.interpretation{margin-top:22px}.source-detail{margin-top:24px;padding-top:16px;border-top:1px solid #D5D5CC;font-size:13px;color:#60605B}.source-detail summary{cursor:pointer}.source-detail a{display:block;margin-top:15px;text-decoration:underline;text-underline-offset:3px;overflow-wrap:anywhere}.source-detail p{font-size:13px;line-height:1.8}.section-intro{font-size:14px;color:var(--muted);margin-top:-8px;margin-bottom:25px}.questions{padding-bottom:38px;border-bottom:1px solid var(--line)}.question{margin-bottom:23px}.question label{display:block;font-weight:600;font-size:16px;margin-bottom:11px}.question label span{color:var(--accent);margin-right:5px}.question textarea{display:block;width:100%;min-height:112px;resize:vertical;border:1px solid var(--line);border-radius:5px;background:#fff;padding:15px;font-size:16px;line-height:1.8}.question textarea::placeholder{color:#73736D}.answer-foot{display:flex;align-items:flex-start;justify-content:space-between;gap:20px}.answer-foot p{color:var(--muted);font-size:12px;max-width:70%}.answer-foot a{white-space:nowrap}.related{margin-top:40px}.related-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.related-card{padding:22px;border:1px solid var(--line);border-radius:5px;background:white}.related-card:hover{border-color:var(--accent)}.related-card h3{font-size:17px;line-height:1.6;margin:10px 0 7px;word-break:keep-all}.related-card p{font-size:14px;color:var(--muted)}.end-nav{display:flex;justify-content:space-between;gap:15px;font-size:14px;margin-top:38px;color:var(--accent)}.empty{padding:60px 22px;text-align:center;border:1px dashed var(--line);border-radius:6px}.empty h2,.empty h1{font-size:22px;line-height:1.6}.empty p{margin:13px 0 24px;color:var(--muted);font-size:15px}.workbook-heading h1{font-size:34px;line-height:1.5}.workbook-heading>p:last-child{color:var(--muted);font-size:15px;margin-top:8px}.workbook-controls{display:flex;align-items:flex-end;gap:35px;justify-content:space-between;margin:30px 0 12px}.workbook-controls label{font-size:13px;color:var(--muted);width:400px;max-width:100%}.workbook-controls input{display:block;width:100%;font-size:16px;padding:10px 0;border:0;border-bottom:1px solid #8B8B83;background:transparent}.export-actions{display:flex;gap:10px;flex-shrink:0}.storage-note{font-size:12px;color:var(--muted);max-width:730px;line-height:1.9}.workbook-toolbar{display:flex;align-items:center;justify-content:space-between;gap:15px;font-size:14px;margin:35px 0 20px}.workbook-toolbar strong{font-weight:600;color:var(--accent)}.text-button{border:0;background:transparent;color:var(--accent);font-size:14px;padding:8px 0}.print-title{display:none}.workbook-section{display:grid;grid-template-columns:1fr 1.6fr;gap:40px;border-top:1px solid var(--line);padding:32px 0}.workbook-section h2{font-size:22px;line-height:1.6;margin:10px 0 14px;word-break:keep-all}.workbook-section dl{margin:0}.workbook-section dt{font-size:14px;font-weight:600;margin-bottom:7px}.workbook-section dd{font-size:16px;white-space:pre-wrap;overflow-wrap:anywhere;margin:0 0 26px}.workbook-section dd:last-child{margin-bottom:0}.unanswered{color:var(--muted)}.workbook-note{border-top:1px solid var(--line);padding-top:25px;color:var(--muted);font-size:13px;margin-top:25px}.legacy-notes{padding:22px;background:var(--wash);font-size:14px}.legacy-notes summary{cursor:pointer}.legacy-notes h3{font-size:16px;margin-top:25px}.legacy-notes p{white-space:pre-wrap;overflow-wrap:anywhere}.about h1{font-size:36px;line-height:1.5;margin-bottom:35px}.about>p{font-size:16px;line-height:1.9}.source-list section{border-top:1px solid var(--line);padding:20px 0;font-size:14px}.source-list h3{font-size:17px;margin-bottom:6px}.source-list a{color:var(--accent);text-decoration:underline;text-underline-offset:3px}.source-list p{font-size:13px;color:var(--muted);margin-top:10px}.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);padding:12px 20px;border-radius:6px;background:var(--ink);color:white;font-size:14px;max-width:calc(100vw - 30px);width:max-content;box-shadow:0 5px 25px #00000020;z-index:20}.toast[hidden]{display:none}
@media(max-width:760px){.workbook-controls{align-items:flex-start;flex-direction:column;gap:18px}.workbook-section{grid-template-columns:1fr;gap:22px}.workbook-toolbar{align-items:flex-start;flex-direction:column;gap:5px}}
@media(max-width:520px){nav{font-size:14px;gap:12px}.wordmark{font-size:24px}#topbar{padding-left:16px;padding-right:16px;gap:12px}main{padding-left:16px;padding-right:16px}.search-row{gap:13px}.search input{font-size:14px}.saved-filter span{display:none}.saved-filter{font-size:14px}.saved-filter b{margin-left:2px}.result-bar>span{display:none}.bookmark{width:36px;height:36px;top:8px;right:8px}.heading-meta{align-items:flex-start}.heading-meta .eyebrow{padding-top:10px;max-width:65%;font-size:12px}.save-detail{font-size:12px;padding:8px 10px}.body-copy p{font-size:16px}.reading .section-label h2{font-size:18px}.example{padding:23px 20px}.related-grid{grid-template-columns:1fr}.answer-foot{flex-direction:column;gap:12px}.answer-foot p{max-width:100%}.end-nav{font-size:13px}.workbook-heading h1{font-size:28px}.workbook-section h2{font-size:21px}.about h1{font-size:30px}}
@media(max-width:359px){#topbar{align-items:flex-start;flex-direction:column;gap:18px}.grid{grid-template-columns:1fr}.concept-card{min-height:220px}.export-actions{flex-wrap:wrap}}
@media print{@page{margin:18mm}body{background:white;color:#111;font-size:11pt}#topbar,footer,#sidebar,.skip,.workbook-controls,.storage-note,.workbook-toolbar,.edit-link,.legacy-notes,.toast,.workbook-heading,.workbook-note{display:none!important}main{max-width:none;padding:0;min-height:0}.print-title{display:block;font-size:22pt;margin-bottom:25px}.workbook-section{display:block;break-inside:avoid;padding:20px 0}.workbook-section h2{font-size:16pt;margin-bottom:15px}.workbook-section dd{font-size:11pt}.workbook-section dt{font-size:10pt}.small-label{color:#333}a{color:inherit}}
.view-switch{display:inline-flex;gap:0;border:1px solid var(--line);border-radius:6px;padding:4px;margin-top:20px;font-size:14px;background:#fff;letter-spacing:-.03em}.view-switch a{padding:7px 14px;border-radius:3px;white-space:nowrap}.view-switch a[aria-current]{background:var(--ink);color:white}.map-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:24px}.map-heading h1{font-size:30px;line-height:1.4;letter-spacing:-.05em}.map-heading>div>p:last-child{font-size:15px;color:var(--muted);margin-top:8px}.map-heading .view-switch{margin-top:0;flex-shrink:0}.map-toolbar{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:24px 0 16px;font-size:14px}.map-toolbar label{display:flex;gap:12px;align-items:center}.map-toolbar select{font:inherit;color:var(--ink);background:white;border:1px solid var(--line);border-radius:5px;padding:9px 30px 9px 12px;max-width:220px}.map-toolbar select:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.map-toolbar>p{color:var(--muted);font-size:13px}.map-legend{display:flex;align-items:center;flex-wrap:wrap;gap:16px;font-size:12px;color:var(--muted);margin-bottom:16px}.map-legend>span{display:flex;align-items:center;gap:7px}.map-legend i{display:inline-block;width:10px;height:10px;border-radius:2px}.legend-root{background:var(--accent)}.legend-branch{border:1px solid #A7A79B;background:white}.legend-selected{background:var(--ink)}.map-legend p{margin-left:auto}.root-map-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.root-tree{padding:16px 14px;background:white;border:1px solid var(--line);border-radius:6px;min-width:0}.root-tree h2{font-size:15px;line-height:1.6;margin:0}.root-node{display:flex;align-items:center;gap:6px;font-size:14px;line-height:1.6;padding:5px 8px;border:1px solid transparent;border-radius:4px;min-height:34px;transition:background .15s,border-color .15s}.root-node-primary{color:var(--accent);font-size:15px;font-weight:700;padding:5px 0;border-radius:3px}.map-number{font:12px Arial;margin-right:3px;flex-shrink:0}.node-arrow{margin-left:auto;flex-shrink:0;color:var(--muted);font-size:14px}.root-node small{font-size:11px;border:1px solid var(--line);padding:0 4px;border-radius:3px;font-weight:400;white-space:nowrap;color:var(--muted)}.root-node.is-connected{border-color:#A7A79B;background:#EAF1EC}.root-node.is-selected{background:var(--ink);color:white;border-color:var(--ink);padding-left:8px}.root-node.is-selected .node-arrow,.root-node.is-selected small{color:white}.root-node:hover,.root-node.is-echo{background:var(--wash);border-color:var(--accent);color:var(--accent)}.tree-question{font-size:12px;line-height:1.7;color:var(--muted);margin:4px 0 10px;padding-left:21px;word-break:keep-all}.root-branches{list-style:none;padding:0 0 0 20px;margin:0 0 0 8px}.root-branches li{position:relative}.root-branches li:before{content:'';position:absolute;left:-13px;top:0;bottom:0;border-left:1px solid #A7A79B}.root-branches li:after{content:'';position:absolute;left:-13px;width:13px;top:17px;border-top:1px solid #A7A79B}.root-branches li:last-child:before{height:17px;bottom:auto}.root-branches li:first-child:before{top:-9px}.root-branches li+li{margin-top:2px}.map-note{font-size:12px;color:var(--muted);margin-top:18px}.breadcrumb-map{margin-left:auto;color:var(--accent)}.map-inspector{border:1px solid #A7A79B;background:var(--wash);padding:20px 24px;border-radius:6px;margin-bottom:20px}.inspector-heading{display:flex;align-items:center;gap:20px}.inspector-heading h2{font-size:21px;line-height:1.6}.inspector-heading>.text-link{margin-left:auto}.map-reset{font-size:13px;color:var(--muted);text-decoration:underline}.map-inspector>p{font-size:14px;color:var(--muted);margin:8px 0 15px}.connection-row{display:grid;grid-template-columns:200px 1fr;gap:12px;font-size:14px;margin-top:10px}.connection-row>span{color:var(--muted);padding-top:5px}.connection-row>div{display:flex;flex-wrap:wrap;gap:6px}.connection-row a{padding:4px 10px;border:1px solid #D5D5CC;background:white;border-radius:4px}.connection-row a:hover{border-color:var(--accent);color:var(--accent)}
main:has(.map-heading){padding-top:26px}.map-heading .eyebrow{display:none}.map-toolbar{margin-top:18px;margin-bottom:12px}.map-legend{margin-bottom:12px}.root-tree{padding:10px 12px}.root-node{min-height:28px;padding-top:2px;padding-bottom:2px}.tree-question{margin-top:2px;margin-bottom:6px}.root-branches li:after{top:14px}.root-branches li:last-child:before{height:14px}.root-node small{font-size:12px}
@media(max-width:1050px){.root-map-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.map-heading{flex-direction:column;gap:15px}}
@media(max-width:720px){.root-map-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.map-legend p{width:100%;margin-left:0}.map-toolbar{align-items:flex-start;flex-direction:column;gap:8px}.connection-row{grid-template-columns:1fr;gap:4px}.inspector-heading{flex-wrap:wrap;gap:12px}.inspector-heading>div{width:100%}.inspector-heading>.text-link{margin-left:0}.map-inspector{padding:18px}.map-heading h1{font-size:26px}}
@media(max-width:520px){.root-map-grid{gap:10px}.root-tree{padding:12px 8px}.root-node{font-size:14px;padding-left:4px;padding-right:4px}.root-node-primary{font-size:14px;gap:4px}.root-node-primary .node-arrow{display:none}.root-node small{display:none}.root-branches{padding-left:12px;margin-left:4px}.root-branches li:before{left:-9px}.root-branches li:after{left:-9px;width:9px}.tree-question{padding-left:0;min-height:41px}.map-number{font-size:12px;margin-right:0}.breadcrumb-map{width:100%;margin-left:0}.view-switch a{padding:7px 12px}.map-toolbar select{max-width:205px}.map-note{line-height:1.9}}
@media(max-width:359px){.root-map-grid{grid-template-columns:1fr}.tree-question{min-height:0}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}