:root{font-family:Pretendard,-apple-system,BlinkMacSystemFont,Segoe UI,Noto Sans KR,sans-serif;color:#222e32;background:#fff;line-height:1.65;font-synthesis:none;--accent:#216d66;--ink:#1d3030;--muted:#728080;--line:#e0e6e5;--tint:#eef5f3;--nav:244px}*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}a:hover{color:var(--accent)}button,input,select{font:inherit;color:inherit}button{cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:6px;border:0;background:none}button:disabled{opacity:.3;cursor:default}button,a,input,select{outline-offset:4px}:focus-visible{outline:2px solid #368e82}svg{flex-shrink:0}h1,h2,h3,h4,p{margin:0}h1,h2,h3,h4{word-break:keep-all;overflow-wrap:anywhere}button,a{-webkit-tap-highlight-color:transparent}[id]{scroll-margin-top:90px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}.skip-link{position:fixed;top:-80px;left:20px;z-index:100;background:var(--accent);color:#fff;padding:12px}.skip-link:focus{top:8px}.topbar{height:60px;display:flex;align-items:center;justify-content:space-between;padding:0 26px;border-bottom:1px solid var(--line);position:sticky;top:0;background:#fff;z-index:40}.brand,.topbar>div,.back-library{display:flex;align-items:center;gap:10px}.brand{font-size:16px}.brand>svg{color:var(--accent)}.brand b{color:#b0b9b7;margin:0 7px}.brand strong{font-weight:600}.back-library{font-size:14px;color:#667672}.menu-toggle{display:none}.shell{display:grid;grid-template-columns:var(--nav) minmax(0,1fr);max-width:1700px;margin:auto}.sidebar{position:sticky;top:60px;height:calc(100dvh - 60px);overflow-y:auto;border-right:1px solid var(--line);padding:24px 16px;font-size:14px;scrollbar-width:thin}.sidebar-caption{font-size:10px;letter-spacing:1.4px;color:#83928d;display:flex;justify-content:space-between;padding:0 10px 15px}.sidebar>a,.sidebar nav a,.sidebar-bottom a{display:flex;align-items:center;gap:10px;padding:10px;border-radius:5px}.sidebar>a{font-weight:600}.sidebar nav{padding:9px 0}.sidebar nav a{align-items:flex-start;line-height:1.5;padding:8px 10px}.sidebar small{display:block;font-size:10px;color:#88918d;margin-bottom:3px;letter-spacing:.4px}.nav-no{font-size:11px;color:#81938c;padding-top:4px;min-width:20px}.sidebar .selected{background:var(--tint);color:#175c53}.sidebar-bottom{border-top:1px solid var(--line);margin-top:12px;padding-top:12px;color:#5d6d66}.sidebar-bottom b{font-size:11px;margin-left:auto;color:#76988c}main{min-width:0;padding:24px clamp(28px,4vw,70px) 0;max-width:1290px;width:100%;margin:0 auto}.page-toolbar{display:flex;align-items:center;justify-content:space-between;gap:20px;font-size:12px;color:#7a8981}.page-toolbar>span{display:flex;align-items:center;gap:7px}.search-wrapper{position:relative;width:300px}.search{display:flex;align-items:center;gap:8px;border:1px solid #dfe5e2;border-radius:6px;padding:8px 10px;background:#fff;color:#7b8881}.search:focus-within{border-color:#73a18e}.search input{width:100%;border:0;outline:0;min-width:0;background:none;font-size:13px}.search kbd{font-size:10px;white-space:nowrap;border:1px solid #e1e7e4;border-radius:3px;padding:0 3px}.search-results{position:absolute;right:0;top:45px;width:min(520px,calc(100vw - 36px));max-height:65vh;overflow-y:auto;background:#fff;box-shadow:0 10px 40px #102d2825;border:1px solid var(--line);z-index:45;border-radius:8px}.search-summary{display:flex;justify-content:space-between;padding:13px 16px;border-bottom:1px solid var(--line)}.search-results>button{display:block;width:100%;text-align:left;padding:15px 18px;border-bottom:1px solid #edf1ef}.search-results>button:hover{background:var(--tint)}.search-results small{color:var(--accent);font-size:11px}.search-results p{font-size:14px;color:#394843;line-height:1.7}.search-results mark{background:#dbebae;color:inherit}.page-heading{padding:48px 0 35px}.eyebrow{font-size:11px;letter-spacing:1.5px;font-weight:600;color:var(--accent);display:flex;gap:10px;align-items:center}.eyebrow .dot{height:6px;width:6px;border-radius:50%;background:var(--accent)}h1{font-size:clamp(32px,3.6vw,48px);letter-spacing:-1.8px;line-height:1.25;margin:16px 0 18px;color:var(--ink);font-weight:750}.page-heading>p{font-size:18px;color:#627069;line-height:1.8;letter-spacing:-.3px}.meta{display:flex;flex-wrap:wrap;gap:0;margin-top:23px;font-size:12px;color:#7b8981}.meta span+span:before{content:"·";padding:0 10px;color:#bdc7c1}.overview-grid{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(250px,1fr);gap:36px}.section-heading{display:flex;align-items:center;justify-content:space-between;padding-bottom:11px;border-bottom:2px solid #263c33;gap:6px}.section-heading h2{font-size:17px;letter-spacing:-.5px}.section-heading>span{display:flex;align-items:center;gap:4px;font-size:10px;color:#8a958d}.directory>a{display:flex;align-items:center;gap:11px;padding:12px 0;border-bottom:1px solid #e9eeeb;font-size:14px;line-height:1.5}.directory>a:hover{background:#f5f9f6}.directory-no{font-size:11px;color:#92a095;width:18px}.directory>a>span:nth-child(2){flex:1}.directory small{font-size:10px;letter-spacing:.4px;color:#93a091;display:block}.directory-kind{font-size:10px;color:#829180;white-space:nowrap}.directory>a>svg{color:#9aa89b}.resource{display:flex;align-items:center;gap:12px;border-bottom:1px solid #e8eeea;padding:15px 0}.resource>span:nth-child(2){flex:1;min-width:0}.resource strong{font-size:14px;font-weight:550}.resource small{display:block;font-size:10px;color:#8a958d;margin-top:3px}.file-type{font-size:10px;font-weight:650;letter-spacing:.3px;color:#699179;background:#eef4ee;padding:5px 7px;border-radius:3px;display:inline-flex;flex-shrink:0}.resource>svg{color:#8b9b8d}.tools{padding:25px 0 10px}.tools h3{font-size:12px;color:#839184;font-weight:500;margin-bottom:9px}.tools>a{display:flex;align-items:center;justify-content:space-between;padding:7px 0;font-size:13px;color:#4e6d59}.source-note{font-size:11px;color:#929c93;line-height:1.75;margin:18px 0}.reading-divider{margin:44px 0 0;padding:15px 0;border-top:1px solid var(--line);display:flex;justify-content:space-between;font-size:10px;letter-spacing:1px;color:#8e9b90}.course-section{padding:35px 0 20px}.chapter-heading{padding-bottom:25px;border-bottom:1px solid var(--line);margin-bottom:28px}.chapter-heading h2{font-size:30px;letter-spacing:-1px;line-height:1.4;margin-top:13px;color:var(--ink)}.chapter-heading p{font-size:15px;color:#7a877e;margin-top:10px}.chapter-heading .eyebrow{justify-content:space-between}.chapter-heading .eyebrow span{font-size:10px;color:#9ba69c;font-weight:400}.chapter-meta{display:flex;justify-content:space-between;gap:15px;color:#8a988e;font-size:11px;margin-top:15px}.chapter-meta>span,.chapter-meta>a{display:flex;align-items:center;gap:5px}.chapter-meta>span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chapter-end{display:flex;justify-content:space-between;gap:12px;font-size:11px;color:#93a093;padding:19px 0;border-bottom:1px solid var(--line);margin-top:34px}.chapter-end a{display:flex;align-items:center;gap:5px;white-space:nowrap}.prose{font-size:18px;line-height:1.85;color:#34413a;overflow-wrap:anywhere}.prose .text-block{margin:10px 0;white-space:pre-wrap}.prose .text-block:has(>div:empty){display:none}.prose h3{font-size:25px;line-height:1.5;margin:30px 0 16px;color:#233e30;letter-spacing:-.7px}.prose h4{font-size:20px;line-height:1.6;margin:25px 0 12px;color:#375445;letter-spacing:-.5px}.prose h3 div,.prose h4 div{display:inline}.prose a:not(.video-source){color:#3b8064;text-decoration:underline;text-underline-offset:4px;text-decoration-color:#c6d9c9}.prose strong{font-weight:650;color:#2d4838}.prose code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.9em;background:#f0f4ee;border-radius:3px;padding:1px 4px}.prose .column_list{display:flex;gap:20px;align-items:flex-start;margin:15px 0}.prose .column{min-width:0;flex:1}.prose hr{border:0;border-top:1px solid #edf1eb;margin:32px 0}.prose .list-item{display:flex;gap:13px;margin:7px 0}.prose .list-item>span{color:#85a38a}.prose .list-item>div{min-width:0}.prose .note{margin:18px 0;padding:13px 0 13px 18px;border-left:3px solid #9fc5a7;white-space:pre-wrap;font-size:16px;background:linear-gradient(90deg,#f5f8f1,transparent)}.prose .checkline:before{content:"✓";color:#4e8c62;margin-right:8px}.prose .checkline>div{display:inline}.lesson-image{margin:16px 0;min-width:0}.lesson-image>a{position:relative;display:inline-block;max-width:100%;text-decoration:none!important}.lesson-image img{display:block;max-width:100%;max-height:340px;width:auto;height:auto;border-radius:4px;object-fit:contain}.lesson-image a>span{position:absolute;bottom:7px;right:7px;background:#fffe;border-radius:3px;padding:3px 6px;font-size:9px;color:#657967}.lesson-image figcaption{font-size:12px;color:#8c988b;margin-top:8px}.video-reference{margin:20px 0}.video-reference video{max-width:100%;max-height:400px}.video-source{display:inline-block;max-width:100%;border-bottom:1px solid #d8e5d6;padding-bottom:9px}.video-source>img{display:block;max-width:100%;max-height:230px;border-radius:4px;object-fit:contain}.video-source>span{display:flex;align-items:center;gap:9px;font-size:13px;color:#4d7b55;padding-top:8px}.code{margin:20px 0;border-radius:6px;overflow:hidden;background:#f3f6f2;max-width:100%}.codebar{display:flex;justify-content:space-between;align-items:center;padding:9px 15px;background:#eaf0e7;border-bottom:1px solid #dde6d9;font-size:10px;color:#82917f;letter-spacing:.5px}.codebar button{font-size:11px;letter-spacing:0;color:#577450}.code pre{margin:0;padding:18px 20px;max-height:320px;overflow:auto;white-space:pre-wrap;line-height:1.8;font-size:15px;tab-size:2}.code pre code{background:none;padding:0;color:#395139;font-size:inherit}.table-scroll{overflow-x:auto;max-width:100%;margin:20px 0;font-size:14px;line-height:1.7}.table-scroll table{border-collapse:collapse;width:100%;min-width:540px}.table-scroll th,.table-scroll td{padding:12px;border:1px solid #dfe7db;vertical-align:top}.table-scroll th,.table-scroll tr:first-child{background:#f0f5ec;color:#4e6e43;font-weight:600}.table-scroll td div{min-width:0!important}.table-scroll td p{margin:0}.bookmark{margin:18px 0;font-size:14px}.bookmark a{display:flex;gap:8px;align-items:center;padding:9px 0}.inline-file{display:flex;gap:12px;border-top:1px solid #e2e9dd;border-bottom:1px solid #e2e9dd;padding:15px 0;font-size:14px;margin:18px 0}.inline-file a{font-size:12px}.slide-viewer{border:1px solid var(--line);border-radius:6px;overflow:hidden;background:#f6f8f5}.slide-viewer>a{display:block}.slide-viewer img{display:block;width:100%;height:auto;aspect-ratio:1214/683;object-fit:contain}.slide-controls{display:flex;align-items:center;gap:14px;padding:13px 17px;background:#fff;border-top:1px solid var(--line);font-size:12px}.slide-controls select{border:0;background:transparent;padding:4px;font-weight:650}.slide-controls>a{margin-left:auto;display:flex;align-items:center;gap:6px;color:#7b9078}.gallery-tools{display:flex;flex-direction:column;gap:17px;margin-bottom:22px}.filter-tabs{display:flex;flex-wrap:wrap;gap:7px}.filter-tabs button{font-size:12px;padding:7px 11px;color:#80917a;border-radius:4px;border:1px solid #e1e8db}.filter-tabs .active{color:#37652c;background:#eef5e7;border-color:#abc99a}.gallery-search{max-width:350px}.submission-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0 22px}.submission{min-width:0;padding:23px 0;border-bottom:1px solid var(--line)}.submission-top{display:flex;align-items:center;justify-content:space-between;color:#8a9e7b;margin-bottom:18px}.media-symbol{height:45px;width:45px;display:grid;place-items:center;background:#f0f5e9;border-radius:6px}.submission-top>span:last-child{font-size:10px}.submission>small,.source-post>small{color:#8e9f80;font-size:10px}.submission h3,.source-post h3{font-size:17px;color:#3b5331;margin:4px 0 8px}.post-excerpt{font-size:12px;color:#839175;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.post-actions{display:flex;justify-content:space-between;gap:8px;align-items:center;margin-top:20px;font-size:11px}.post-actions>a,.post-actions>button{display:flex;align-items:center;gap:4px;color:#658b49;padding:0}.pagination{display:flex;align-items:center;justify-content:center;gap:18px;padding:25px 0;color:#7c906c;font-size:12px}.pagination>span{margin-right:auto}.pagination>strong{font-size:11px}.empty{padding:25px;color:#8b9b7e;font-size:14px}.appendix-item{border-bottom:1px solid var(--line)}.appendix-item summary{padding:18px 0;cursor:pointer;font-size:16px;color:#405936}.appendix-item summary>span{float:right;color:#8b9f7b;font-size:11px}.appendix-item .source-post{padding:15px 0 25px}.source-post>.prose{font-size:16px;line-height:1.8}.source-post .prose p{margin:9px 0}.source-post .prose li{margin:7px 0}.source-post .prose ol,.source-post .prose ul{padding-left:23px}.post-files{font-size:12px;margin-top:15px}.post-files>div{display:flex;align-items:center;gap:12px;border-bottom:1px solid #e8efdf;padding:12px 0}.post-files>div>span:nth-child(2){min-width:0;overflow-wrap:anywhere;flex:1}.post-files a{white-space:nowrap;display:flex;align-items:center;gap:4px}.prompt-text{font-size:13px;white-space:pre-wrap;overflow-wrap:anywhere;max-height:320px;overflow:auto;line-height:1.7}.source-post details{font-size:13px;margin-top:15px}.source-post summary{cursor:pointer}footer{display:flex;align-items:center;flex-wrap:wrap;gap:20px;padding:30px 0 40px;border-top:1px solid var(--line);color:#8c9d7a;font-size:11px}footer>span,footer>a{display:flex;align-items:center;gap:6px}footer>span{color:#526b3d;font-weight:600}footer>small{margin-left:auto}.back-top{position:fixed;right:22px;bottom:22px;background:#fff;border:1px solid var(--line);width:38px;height:38px;border-radius:50%;display:grid;place-items:center;box-shadow:0 3px 12px #17341b10;z-index:20;color:#668646}.mobile-only{display:none}dialog{border:1px solid #dfe8d8;border-radius:10px;width:min(680px,calc(100vw - 32px));max-height:85dvh;padding:0 28px 26px;box-shadow:0 20px 70px #12251320}dialog::backdrop{background:#1b28166b;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.dialog-head{position:sticky;top:0;background:#fff;display:flex;justify-content:space-between;align-items:center;padding:16px 0;margin-bottom:20px;border-bottom:1px solid var(--line);font-size:12px;color:#718b5b}.dialog-head button{padding:5px}@media(min-width:1550px){:root{--nav:272px}.sidebar{font-size:15px}.overview-grid{gap:55px}.directory>a{font-size:16px}.directory small{display:inline-block;margin-right:13px}.directory-no{width:22px}.section-heading>span{font-size:11px}}@media(max-width:1100px){:root{--nav:222px}.sidebar{padding:20px 10px;font-size:13px}main{padding-left:28px;padding-right:28px}.overview-grid{grid-template-columns:1fr;gap:35px}.resources{display:grid;grid-template-columns:1fr 1fr;column-gap:28px}.resources .section-heading{grid-column:1/-1}.resources .tools{padding-top:20px}.resources>.source-note{align-self:end}.chapter-meta>span{max-width:80%}.submission-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:760px){:root{--nav:0}.topbar{height:56px;padding:0 18px}.brand{font-size:14px}.brand b{margin:0 3px}.brand>svg{width:20px}.topbar>div{gap:14px}.back-library{font-size:11px;gap:4px}.menu-toggle{display:flex;padding:4px}.menu-toggle svg{width:20px}.shell{display:block}.sidebar{display:none}.sidebar.open{display:block;position:fixed;top:56px;left:0;width:280px;background:#fff;z-index:42;height:calc(100dvh - 56px);font-size:14px;padding:22px 16px}.menu-backdrop{position:fixed;inset:56px 0 0;background:#17361d50;z-index:41;width:100%}main{padding:19px 21px 0}.page-toolbar{display:block}.page-toolbar>span{display:none}.search-wrapper{width:100%}.search{padding:10px 12px}.search input{font-size:14px}.search-results{width:100%}.page-heading{padding:35px 0 29px}h1{font-size:36px;letter-spacing:-1.3px;margin-top:14px}.mobile-only{display:block}.page-heading>p{font-size:16px}.eyebrow{font-size:10px;letter-spacing:1.1px}.meta{font-size:10px;gap:5px 0}.meta span+span:before{padding:0 7px}.overview-grid{gap:30px}.section-heading>span{display:none}.section-heading h2{font-size:17px}.directory>a{font-size:15px;padding:13px 0;gap:10px}.directory-kind{font-size:9px}.resources{display:block}.resource{padding:15px 0}.resource strong{font-size:15px}.resource small{font-size:11px}.tools{display:grid;grid-template-columns:1fr 1fr;gap:0 25px}.tools h3{grid-column:1/-1}.tools>a{font-size:13px}.course-section{padding-top:28px}.chapter-heading h2{font-size:26px;line-height:1.5}.chapter-heading{padding-bottom:22px;margin-bottom:22px}.chapter-meta>span{max-width:78%;font-size:10px}.chapter-meta>span>svg{display:none}.prose{font-size:17px;line-height:1.85}.prose h3{font-size:23px}.prose h4{font-size:19px}.prose .column_list{flex-wrap:wrap;gap:15px}.prose .column{flex-basis:calc(50% - 15px)}.prose .column:has(.code){flex-basis:100%}.prose .column .lesson-image img{max-height:250px}.prose .note{font-size:15px}.code pre{font-size:14px;padding:15px;max-height:290px}.codebar{padding:9px 12px}.lesson-image img{max-height:310px}.table-scroll{font-size:13px}.slide-controls{padding:10px;gap:10px}.slide-viewer{border-radius:4px}.slide-viewer img{min-height:180px}.chapter-end{font-size:10px}.chapter-end>span{max-width:75%}.submission-grid{gap:0 17px}.submission h3{font-size:16px}.submission>small{font-size:9px}.post-actions{font-size:10px;flex-wrap:wrap}.filter-tabs{gap:6px}.filter-tabs button{font-size:10px;padding:6px 8px}.appendix-item summary{font-size:15px}.appendix-item summary>span{display:block;float:none;margin:4px 0 0 17px;font-size:10px}.source-post>.prose{font-size:15px}footer{gap:13px;font-size:10px}footer>small{margin-left:0}.back-top{right:15px;bottom:15px}dialog{padding:0 20px 22px}}@media(prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}a,button{transition:color .15s,background .15s}}