:root{--lb-bg:#f5f6f8;--lb-ink:#162e43;--lb-muted:#627386;--lb-line:#dce3e9;--lb-blue:#245cd1;--lb-pale:#e9effc;--lb-lime:#d4e8b6}*{box-sizing:border-box}body{margin:0;background:var(--lb-bg);color:var(--lb-ink);font:16px/1.8 Pretendard,-apple-system,sans-serif}button,input,textarea{font:inherit}button,a,summary{touch-action:manipulation}button{cursor:pointer}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible,textarea:focus-visible{outline:3px solid #8caef3;outline-offset:3px}.lab-banner{display:flex;justify-content:space-between;gap:12px;padding:8px max(24px,calc((100vw - 1200px)/2));background:#e9edf4;font-size:12px;color:#4b6177}.lab-top{max-width:1248px;padding:22px 24px;margin:auto;display:flex;align-items:center;gap:40px;border-bottom:1px solid var(--lb-line)}.lab-brand{font-weight:700;font-size:18px;letter-spacing:-.6px}.lab-brand span{font-weight:400;margin-left:8px;color:var(--lb-muted)}.lab-top nav{display:flex;gap:24px;font-size:14px}.lab-role{display:flex;gap:3px;margin-left:auto;border:1px solid var(--lb-line);padding:3px;border-radius:999px;background:white}.lab-role button{border:0;background:transparent;color:var(--lb-muted);border-radius:999px;padding:7px 18px;min-height:40px;font-size:13px}.lab-role button[aria-pressed=true]{background:var(--lb-blue);color:white}#main{max-width:1248px;padding:44px 24px 80px;margin:auto;outline:none}h1,h2,h3,p{margin:0}h1{font-size:clamp(32px,4vw,52px);line-height:1.3;letter-spacing:-1.8px}h2{font-size:28px;line-height:1.45;letter-spacing:-.8px}h3{font-size:20px;line-height:1.5;letter-spacing:-.3px}.lb-kicker{font-size:11px;letter-spacing:1.7px;font-weight:700;color:var(--lb-blue);margin-bottom:14px}.lb-muted{color:var(--lb-muted)}.lb-small{font-size:13px;color:var(--lb-muted)}.lb-hero{display:grid;grid-template-columns:1.1fr .85fr;gap:60px;align-items:center;margin:14px 0 50px}.lb-hero p{font-size:17px;color:var(--lb-muted);line-height:1.95;margin:20px 0 26px;max-width:38ch}.lb-button{display:inline-flex;justify-content:center;align-items:center;min-height:48px;padding:11px 19px;border:1px solid var(--lb-line);border-radius:6px;background:white;color:var(--lb-ink);font-weight:600;font-size:14px;gap:12px}.lb-button.primary{background:var(--lb-blue);border-color:var(--lb-blue);color:white}.lb-button:disabled{opacity:.5;cursor:default}.lb-button:hover:not(:disabled){filter:brightness(.96)}.lb-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}.lb-start{background:#183347;color:white;border-radius:10px;padding:26px}.lb-start .lb-kicker{color:var(--lb-lime)}.lb-start h2{font-size:25px}.lb-start svg{display:block;width:100%;height:200px;margin:8px 0}.lb-start .lb-small{color:#c1d3df}.lb-start .lb-button{margin-top:18px}.lb-heading{display:flex;justify-content:space-between;align-items:end;gap:20px;margin:35px 0 22px}.lb-heading p{font-size:14px;color:var(--lb-muted);margin-top:8px}.lb-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.lb-card{background:white;border:1px solid var(--lb-line);border-radius:10px;padding:24px;display:flex;flex-direction:column}.lb-card .lb-tag{color:var(--lb-blue);font-size:12px;margin-bottom:14px}.lb-card h3{margin-bottom:14px}.lb-card p{font-size:14px;color:var(--lb-muted);margin-bottom:14px}.lb-card .lb-button{margin-top:auto;align-self:start}.lb-card .lb-status{font-size:12px;margin:8px 0 18px}.lb-loop{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:18px;border-top:1px solid var(--lb-line);border-bottom:1px solid var(--lb-line);padding:24px 0;margin:38px 0}.lb-loop span{color:var(--lb-blue);font-size:11px}.lb-loop b{display:block;font-size:15px;margin:4px 0}.lb-loop p{font-size:12px;color:var(--lb-muted)}.lb-overview{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.lb-module-tile{background:white;padding:18px;border:1px solid var(--lb-line);border-radius:8px}.lb-module-tile b{display:block;margin:6px 0;font-size:15px}.lb-module-tile small{font-size:12px;color:var(--lb-muted)}.lb-notice{background:var(--lb-pale);border-radius:8px;padding:20px;font-size:14px;line-height:1.85;margin:24px 0}.lb-note-box{background:white;border:1px solid var(--lb-line);padding:24px;border-radius:8px;margin-top:24px}.lb-note-box p{color:var(--lb-muted);font-size:14px;margin:12px 0}.lb-route{font-size:13px;color:var(--lb-muted);margin-bottom:22px;display:inline-block}.lb-filters{display:flex;gap:8px;flex-wrap:wrap;margin:25px 0}.lb-filters button{border:1px solid var(--lb-line);border-radius:999px;background:white;padding:8px 16px;min-height:44px;color:var(--lb-muted);font-size:14px}.lb-filters button[aria-pressed=true]{background:var(--lb-ink);color:white;border-color:var(--lb-ink)}.lb-filters input{margin-left:auto;min-width:0;max-width:100%;flex:0 1 340px;border:1px solid var(--lb-line);border-radius:6px;padding:9px 14px;background:white}.lb-module{background:white;border:1px solid var(--lb-line);border-radius:10px;margin-bottom:20px;padding:25px}.lb-module header{display:grid;grid-template-columns:48px 1fr;gap:15px;margin-bottom:20px}.lb-letter{display:flex;width:44px;height:44px;align-items:center;justify-content:center;background:var(--lb-pale);border-radius:8px;color:var(--lb-blue);font-weight:700}.lb-module h2{font-size:23px}.lb-module header p{font-size:14px;color:var(--lb-muted);margin-top:6px}.lb-curriculum-lesson{border-top:1px solid var(--lb-line)}.lb-curriculum-lesson>summary{cursor:pointer;padding:16px 0;min-height:52px;font-size:15px;font-weight:600}.lb-curriculum-lesson>summary small{font-size:11px;color:var(--lb-muted);font-weight:400;margin-left:10px}.lb-curriculum-detail{display:grid;grid-template-columns:1fr 1fr;gap:15px;padding:0 0 20px 20px;font-size:14px;color:var(--lb-muted)}.lb-curriculum-detail b{display:block;color:var(--lb-ink)}.lb-curriculum-detail .lb-button{grid-column:1/-1;justify-self:start}.lb-title-row{display:flex;justify-content:space-between;gap:20px;align-items:start}.lb-title-row h1{font-size:36px}.lb-title-row p{margin-top:12px;color:var(--lb-muted)}.lb-time{font-size:12px;white-space:nowrap;background:white;border:1px solid var(--lb-line);padding:6px 10px;border-radius:999px}.lb-goal{display:grid;grid-template-columns:1fr 1fr;gap:28px;border-left:3px solid var(--lb-blue);padding:18px 22px;margin:24px 0;background:white;font-size:14px}.lb-goal b{display:block;font-size:12px;color:var(--lb-blue);margin-bottom:5px}.lb-terms{font-size:13px;color:var(--lb-muted);margin:20px 0}.lb-terms summary{cursor:pointer;min-height:44px;padding:8px 0}.lb-terms p{margin:8px 0}.lb-steps{display:flex;border-bottom:1px solid var(--lb-line);margin:24px 0 30px}.lb-steps button{flex:1;background:none;border:0;border-bottom:3px solid transparent;padding:14px 8px;font-size:14px;color:var(--lb-muted);min-height:56px}.lb-steps button[aria-current=step]{border-bottom-color:var(--lb-blue);color:var(--lb-blue);font-weight:700}.lb-steps small{font-size:11px;margin-right:8px}.lb-lesson-layout{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:35px;align-items:start}.lb-scene{position:sticky;top:20px;border-radius:10px;background:#183347;color:#e8f0f5;overflow:hidden}.lb-scene summary{padding:18px 22px;cursor:pointer;font-size:13px}.lb-scene svg{display:block;width:100%;height:auto;padding:0 14px}.lb-scene>p{padding:18px 22px;font-size:14px;line-height:1.9;border-top:1px solid #ffffff20}.lb-legend{font-size:11px;display:flex;gap:15px;flex-wrap:wrap;padding:14px 22px;color:#c8d9e4}.lb-legend i{display:inline-block;width:9px;height:9px;border-radius:50%;background:#b9dcff;margin-right:5px}.lb-legend i.enemy{background:#e7aa85}.lb-legend i.me{background:#c9e6ac}.lb-content>h2{font-size:25px;margin-bottom:16px}.lb-content>p{color:var(--lb-muted);margin-bottom:22px}.lb-options{display:grid;gap:10px;margin:20px 0}.lb-option{display:flex;text-align:left;align-items:start;gap:12px;padding:16px;background:white;border:1px solid #ccd7e0;border-radius:8px;font-size:15px;line-height:1.7;min-height:64px;color:var(--lb-ink)}.lb-option small{color:var(--lb-muted);font-size:11px;border:1px solid var(--lb-line);border-radius:4px;padding:0 6px;margin-top:3px}.lb-option[aria-pressed=true]{border-color:var(--lb-blue);background:var(--lb-pale)}.lb-feedback{border-left:3px solid var(--lb-blue);background:var(--lb-pale);border-radius:6px;padding:20px;margin:20px 0;font-size:15px;line-height:1.95}.lb-feedback b{display:block;margin-bottom:8px}.lb-bottom-nav{display:flex;gap:10px;justify-content:space-between;flex-wrap:wrap;border-top:1px solid var(--lb-line);padding-top:22px;margin-top:30px}.lb-concept{border-bottom:1px solid var(--lb-line);padding:0 0 22px;margin-bottom:25px}.lb-concept h3{margin:8px 0 14px}.lb-concept p{color:#455e72;font-size:15px;line-height:1.95}.lb-concept .lb-try{font-size:14px;color:var(--lb-ink);background:#e9eef3;padding:14px;margin-top:15px;border-radius:6px}.lb-cases{display:flex;gap:10px;flex-wrap:wrap;margin:18px 0}.lb-cases button{background:white;border:1px solid var(--lb-line);border-radius:6px;padding:10px 14px;font-size:13px;color:var(--lb-muted);min-height:44px}.lb-cases button[aria-pressed=true]{background:var(--lb-ink);color:white}.lb-case-text{background:white;border:1px solid var(--lb-line);padding:18px;border-radius:8px;font-size:15px}.lb-task{background:white;border:1px solid var(--lb-line);border-radius:8px;padding:23px;margin:20px 0}.lb-task h3{margin-bottom:12px}.lb-task p,.lb-task li{font-size:15px;color:#455e72;line-height:1.95}.lb-task ol,.lb-task ul{padding-left:22px}.lb-task li{margin:12px 0}.lb-adjust{display:grid;gap:12px}.lb-adjust>div{border-top:1px solid var(--lb-line);padding-top:12px;font-size:14px}.lb-adjust b{display:block}.lb-journal{display:block;width:100%;min-height:140px;resize:vertical;padding:15px;border:1px solid #bbcbd8;border-radius:6px;background:white;margin:10px 0;font:inherit}.lb-field{margin:20px 0}.lb-check{display:flex;gap:10px;align-items:start;font-size:14px;margin:18px 0;padding:16px;background:var(--lb-pale);border-radius:6px}.lb-check input{width:19px;height:19px;flex:none;margin-top:4px}.lb-review{padding:22px;background:white;border:1px solid var(--lb-line);border-radius:8px;margin:18px 0}.lb-review h3{font-size:18px;margin-bottom:14px}.lb-review summary{cursor:pointer;font-size:14px;color:var(--lb-blue);min-height:44px}.lb-review p{font-size:15px;color:#455e72}.lb-reference{font-size:13px;color:var(--lb-muted);margin-top:30px;border-top:1px solid var(--lb-line);padding-top:20px}.lb-reference a{text-decoration:underline;text-underline-offset:3px}.lb-reference p{margin:10px 0}.lb-guidelines{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-top:25px}.lb-guidelines section{border:1px solid var(--lb-line);background:white;padding:25px;border-radius:8px}.lb-guidelines p{font-size:15px;color:var(--lb-muted);margin:14px 0}.lab-skip{position:absolute;top:-100px}.lab-skip:focus{top:0;background:white;padding:14px;z-index:100}#save-message:not(:empty){max-width:1200px;margin:12px auto;padding:15px;background:#f9e8d6;color:#70461d}.lb-footnote{font-size:12px;color:var(--lb-muted);margin-top:15px}.lb-empty{padding:25px;background:white;border:1px solid var(--lb-line);border-radius:8px}.lb-done{font-size:12px;color:var(--lb-blue)}
@media(max-width:950px){.lab-top{gap:20px;flex-wrap:wrap}.lab-top nav{order:3;width:100%}.lb-hero{gap:28px}.lb-cards{grid-template-columns:minmax(0,1fr)}.lb-card{display:block}.lb-overview{grid-template-columns:repeat(2,minmax(0,1fr))}.lb-lesson-layout{grid-template-columns:minmax(0,1fr)}.lb-scene{position:static;max-width:600px;width:100%;margin:auto}.lb-scene svg{max-height:340px}.lb-loop{gap:12px}.lb-loop b{font-size:14px}}
@media(max-width:767px) and (orientation:portrait){.lab-banner{padding:10px 18px;display:block}.lab-banner span{display:block}.lab-top{padding:18px;gap:12px}.lab-brand{font-size:16px}.lab-top nav{gap:22px;font-size:13px}.lab-role button{padding:7px 13px}#main{padding:24px 18px 55px}.lb-hero{grid-template-columns:minmax(0,1fr);gap:25px;margin-bottom:30px}.lb-hero p{font-size:15px;max-width:none}.lb-start{padding:23px}.lb-loop{grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}.lb-heading{display:block}.lb-heading .lb-small{margin-top:10px}.lb-heading h2{font-size:24px}.lb-overview{gap:10px}.lb-module-tile{padding:15px}.lb-card{padding:22px}.lb-module{padding:19px}.lb-module header{grid-template-columns:38px minmax(0,1fr);gap:12px}.lb-letter{width:36px;height:36px}.lb-module h2{font-size:20px}.lb-curriculum-detail{grid-template-columns:minmax(0,1fr);padding-left:0}.lb-filters input{flex:1 0 100%;margin:8px 0 0;width:0}.lb-title-row{display:block}.lb-title-row h1{font-size:30px;overflow-wrap:anywhere}.lb-time{display:inline-block;margin-top:14px}.lb-goal{grid-template-columns:minmax(0,1fr);gap:16px;padding:15px 17px}.lb-steps button{font-size:11px;padding:10px 3px;min-height:64px}.lb-steps small{display:block;margin:0;font-size:10px}.lb-content>h2{font-size:23px}.lb-option{padding:14px;font-size:14px}.lb-guidelines{grid-template-columns:minmax(0,1fr)}.lb-task{padding:19px}.lb-bottom-nav .lb-button{flex:1;min-width:125px}.lb-scene svg{max-height:none}.lb-scene summary{padding:15px 18px}}
@media print{.site-hd,.site-ft,.lab-banner,.lab-top,.lb-filters,.lb-actions,.lb-bottom-nav,.lab-skip{display:none!important}body{background:white;color:#111}#main{padding:0}.lb-module,.lb-task,.lb-review{break-inside:avoid}.lb-curriculum-lesson:not([open])>div{display:block}.lb-scene{position:static}.lb-lesson-layout{display:block}.lb-reference{font-size:11px}}