@font-face{font-family:Pretendard;src:url('fonts/PretendardVariable.woff2') format('woff2');font-weight:100 900;font-display:swap}
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*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:Pretendard,'Malgun Gothic',sans-serif;line-height:1.6}button,input,textarea,select{font:inherit;color:inherit}button,a,input,textarea{touch-action:manipulation}button{cursor:pointer;border:1px solid var(--line);background:var(--white);padding:10px 17px;border-radius:9px;font-weight:650;font-size:14px;line-height:1.35;min-height:42px;transition:background .15s,transform .15s}button:hover{background:var(--lime-light);border-color:var(--sage)}button:active{transform:translateY(1px)}button:disabled{opacity:.36;cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid #5a7740;outline-offset:4px}a{color:inherit;text-underline-offset:4px}h1,h2,h3,p{margin:0;word-break:keep-all;overflow-wrap:anywhere}h1{font-size:clamp(34px,3.45vw,59px);line-height:1.16;letter-spacing:-.045em;font-weight:780}h2{font-size:24px;line-height:1.35;letter-spacing:-.025em}h3{font-size:18px}button.primary,.primary{background:var(--ink);border-color:var(--ink);color:var(--white)}button.primary:hover,.primary:hover{background:#3c4c3c}.accent-button{background:var(--lime);border-color:var(--lime)}.quiet{color:var(--muted);font-size:12px;line-height:1.7}.skip{position:fixed;top:-80px;left:20px;background:white;padding:10px;z-index:99}.skip:focus{top:10px}[hidden]{display:none!important}
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.bottombar{position:fixed;bottom:0;left:0;right:0;height:74px;border-top:1px solid var(--line);padding:13px 32px;display:flex;align-items:center;justify-content:space-between;background:#f7f5f0f5;backdrop-filter:blur(10px);z-index:15}.bottombar button{min-width:105px}.page-position{display:flex;gap:25px;align-items:center}.page-position>span:first-child{font-size:12px;font-variant-numeric:tabular-nums}.key-hint{font-size:10px;color:var(--muted)}
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img{width:100%;max-height:380px;object-fit:contain;border:1px solid var(--line);border-radius:12px;background:#fff}.actual-page p{font-size:23px;line-height:1.7}.ref-links{display:flex;gap:9px;flex-wrap:wrap;margin:20px 0}.ref-links a{padding:9px 12px;border:1px solid var(--line);border-radius:6px;font-size:13px;text-decoration:none;background:white}.design-demo{border:1px solid var(--line);padding:27px;border-radius:13px;transition:all .35s}.design-demo.before{background:#f0e7df;font-family:serif;text-align:center}.design-demo.after{background:var(--white);text-align:left}.design-demo h3{font-size:24px;margin:0 0 14px}.design-demo p{font-size:14px;margin:0 0 15px}.design-demo button{background:var(--ink);color:white}.image-flow{display:grid;grid-template-columns:.6fr 1fr .7fr;gap:20px;align-items:center}.image-flow img{width:100%;border-radius:12px}.image-flow div{font-size:19px;font-weight:600}.image-flow small{display:block;font-size:11px;color:var(--muted);font-weight:400;margin-bottom:12px}.timer-scene{display:grid;grid-template-columns:1fr 1fr;gap:45px;align-items:center;min-height:300px}.timer-clock{font-size:clamp(70px,10vw,140px);line-height:1;letter-spacing:-.06em;font-weight:650;font-variant-numeric:tabular-nums}.timer-controls{display:flex;gap:9px;margin-top:25px}.timer-text{font-size:24px;line-height:1.7}.timer-text small{font-size:12px;color:var(--muted);display:block;margin-bottom:20px}.timer-complete{color:var(--sage)}.database-rows{border-collapse:collapse;width:100%;font-size:14px;margin:20px 0}.database-rows th,.database-rows td{padding:13px;text-align:left;border-bottom:1px solid var(--line)}.database-rows th{font-size:11px;color:var(--muted)}.roi-layout{display:grid;grid-template-columns:1fr .8fr;gap:40px;align-items:center}.roi-fields{display:grid;grid-template-columns:1fr 1fr;gap:15px}.roi-fields label{font-size:12px;display:grid;gap:8px}.roi-fields input{width:100%;padding:10px 13px;border:1px solid var(--line);border-radius:6px;background:white;font-size:20px}.roi-total{background:var(--ink);color:white;border-radius:var(--radius);padding:35px;text-align:center}.roi-total span{display:block;font-size:12px;color:var(--lime)}.roi-total strong{font-size:80px;line-height:1.4;letter-spacing:-.04em}.roi-total p{font-size:13px;color:#d8e0ce}.security-paths{display:grid;grid-template-columns:1fr 1fr;gap:25px}.security-paths div{padding:30px;border-radius:14px;background:var(--white);border:1px solid var(--line)}.security-paths div:last-child{background:var(--ink);color:white}.security-paths h3{font-size:23px;margin:13px 0}.security-paths p{font-size:15px;color:var(--muted)}.security-paths div:last-child p{color:#d7dfd0}
dialog{border:1px solid var(--line);border-radius:18px;padding:28px;background:var(--paper);color:var(--ink);max-height:88dvh;overflow:auto;box-shadow:0 30px 100px #1c261b44}dialog::backdrop{background:#17201866;backdrop-filter:blur(3px)}.menu-dialog{width:min(760px,calc(100vw - 32px))}.notes-dialog{position:fixed;margin:0;top:0;right:0;left:auto;border-radius:0;width:min(540px,100vw);height:100dvh;max-height:none}.prompt-dialog{width:min(760px,calc(100vw - 32px))}.dialog-head{display:flex;gap:20px;justify-content:space-between;align-items:flex-start;margin-bottom:23px}.dialog-head small{font-size:11px;color:var(--muted);display:block;margin-bottom:8px}.dialog-head button{font-size:24px;min-width:38px;min-height:38px;padding:3px;border:0;background:transparent}.dialog-head h2{font-size:25px}.menu-dialog>input{width:100%;border:1px solid var(--line);border-radius:8px;padding:12px 15px;background:white;margin-bottom:22px}#chapter-nav section{border-top:1px solid var(--line);padding:14px 0}#chapter-nav h3{font-size:12px;color:var(--muted);margin-bottom:10px}#chapter-nav button{display:flex;gap:14px;border:0;background:transparent;align-items:center;width:100%;text-align:left;font-size:14px;padding:9px;min-height:36px}#chapter-nav button span{font-size:10px;color:var(--sage);min-width:20px}#chapter-nav button[aria-current=true]{background:var(--lime-light)}#notes-content p{font-size:15px;line-height:1.9;margin:12px 0}#notes-content .teacher-cue{background:var(--lime-light);padding:12px 15px;border-radius:8px;font-size:13px}#notes-content h3{font-size:18px;margin:25px 0 15px}#notes-content blockquote{border-left:3px solid var(--sage);margin:15px 0;padding-left:16px;color:var(--muted)}#notes-content code{font-size:13px;background:#e9ece2;padding:2px 4px}#notes-content details{border-top:1px solid var(--line);margin-top:20px;padding-top:15px}#notes-content summary{cursor:pointer;font-size:14px;font-weight:650}#prompt-text{white-space:pre-wrap;font:17px/1.9 Pretendard,sans-serif;margin:15px 0 25px}.resource-list{display:grid;gap:0;margin-bottom:18px}.resource-list>a,.resource-list>button{position:relative;display:grid;gap:5px;text-align:left;text-decoration:none;padding:18px 75px 18px 0;border:0;border-bottom:1px solid var(--line);background:transparent;border-radius:0}.resource-list strong{font-size:17px}.resource-list span{font-size:12px;color:var(--muted);font-weight:400}.resource-list b{position:absolute;right:0;top:24px;font-size:11px;color:var(--sage)}#toast{position:fixed;bottom:90px;left:50%;transform:translate(-50%,15px);padding:12px 20px;border-radius:10px;background:var(--ink);color:white;box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:.2s;z-index:99;font-size:13px;max-width:90vw;text-align:center}#toast.show{opacity:1;transform:translate(-50%,0)}body.present .header-actions button:not(#fullscreen){display:none}
@keyframes appear{from{opacity:.4;transform:translateY(5px)}to{opacity:1;transform:none}}@keyframes wave{from{height:6px}to{height:24px}}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
@media(min-width:1600px){#stage{padding-top:50px}.split{min-height:570px}.image-frame img{max-height:570px}}
@media(max-width:1100px){.topbar{padding:12px 20px;gap:12px}.session-meta{padding-left:15px;gap:9px;margin-left:0}.session-meta span:first-child{max-width:130px}.header-actions #present{display:none}.split{gap:25px;grid-template-columns:1fr 1.1fr;min-height:420px}.split h1{font-size:38px}#stage{padding-left:30px;padding-right:30px}.image-frame img{max-height:420px}.recommend-row{grid-template-columns:40px 1fr 1fr 65px;gap:12px}.file-browser{grid-template-columns:220px minmax(0,1fr)}.checks{grid-template-columns:1fr 1fr}.illustration-wide{grid-template-columns:1fr .5fr}.prompt-paper pre{font-size:18px}.voice-text{font-size:23px}}
@media(max-width:760px){.topbar{height:67px;padding:10px 15px;gap:10px}.wordmark{font-size:14px}.wordmark span{font-size:9px}.session-meta{display:none}.header-actions{gap:3px}.header-actions button{font-size:10px;padding:7px 6px;min-height:32px}.header-actions #fullscreen{display:none}.header-actions #notes{display:none}#stage{padding:25px 20px 110px;min-height:calc(100dvh - 70px)}.scene-top{margin-bottom:18px}.scene-top .tag{font-size:9px}.eyebrow{font-size:10px}.split{display:flex;flex-direction:column;align-items:stretch;gap:25px;min-height:0}.split h1,h1{font-size:37px;line-height:1.2}.split .subtitle,.scene-heading .subtitle{font-size:15px;margin-top:12px}.scene-heading.wide h1{font-size:31px}.scene-heading.wide h1 br{display:block}.scene-heading{margin-bottom:24px}.image-frame img{max-height:none;object-fit:contain}.action-bar{align-items:flex-start;margin-top:22px;padding-top:17px;gap:10px}.action-bar p{font-size:14px;line-height:1.7}.action-mark{font-size:9px;margin-top:3px}.bottombar{height:72px;padding:12px 17px}.bottombar button{min-width:77px;font-size:12px}.key-hint{display:none}.page-position{gap:0}.page-position>span:first-child{font-size:11px}.visual-stage{padding:19px;min-height:250px}.flow-board,.flow-board.three{grid-template-columns:1fr 1fr;gap:17px;min-height:0;padding:4px 0}.flow-node{min-height:125px;padding:15px 10px}.flow-node strong{font-size:15px}.flow-node small{font-size:10px}.flow-node:not(:last-child)::after{right:-16px;font-size:16px}.flow-node:nth-child(2n)::after{display:none}.flow-symbol{font-size:22px;height:25px;margin-bottom:7px}.motion-caption{font-size:15px;min-height:48px}.motion-controls button{font-size:11px;padding:7px 10px}.two-columns,.compare-grid,.reflection-layout,.load-stack,.routine-layout,.roi-layout,.timer-scene,.security-paths,.actual-page,.image-flow,.illustration-wide{grid-template-columns:1fr;gap:20px}.compare-grid .arrow{transform:rotate(90deg);font-size:22px;line-height:1}.window-body{padding:20px;min-height:120px}.prompt-panel{grid-template-columns:1fr;gap:20px}.prompt-paper{padding:22px}.prompt-paper pre{font-size:17px;line-height:1.85}.prompt-side{border-top:1px solid var(--line);padding-top:18px}.prompt-side .step-index{font-size:30px}.prompt-side p{font-size:14px}.intro-portrait{width:260px}.role-list{margin:20px 0}.role-list p{font-size:14px}.cardnews-show{gap:14px}.cardnews-show img{max-height:320px}.image-labels{display:flex;gap:14px;flex-wrap:wrap}.image-labels div{font-size:14px;padding-bottom:7px}.image-labels span{font-size:10px;margin-right:5px}.voice-visual{grid-template-columns:1fr;padding:5px;gap:20px}.mic{width:58px;height:58px}.voice-text{font-size:20px}.reflection-aside{border-left:0;border-top:1px solid var(--line);padding:20px 0 0}.reflection-tag{font-size:55px}.reflection-aside p{font-size:15px}.prd-grid{grid-template-columns:1fr}.prd-grid label:last-child{grid-column:auto}.board-shell{padding:19px}.board-top{margin-bottom:17px}.board-top h3{font-size:18px}.board-form{grid-template-columns:1fr}.board-form input{font-size:14px}.board-items{max-height:300px}.board-item{align-items:flex-start}.board-item strong{font-size:14px}.board-item p{font-size:11px}.toggle-grid{grid-template-columns:1fr}.toggle-grid button{min-height:85px;padding:15px}.scope-options{gap:8px}.scope-options label{font-size:13px;padding:9px 11px}.selection-result{font-size:16px}.file-browser{grid-template-columns:1fr}.file-tree{border-right:0;border-bottom:1px solid var(--line);max-height:180px;overflow:auto}.file-tree button{font-size:12px;min-height:33px}.file-view pre{font-size:13px;max-height:300px;padding:17px}.file-path{padding:11px 17px}.hub-map{grid-template-columns:1fr;gap:15px}.hub-map>.arrow{text-align:center;transform:rotate(90deg)}.hub-request,.hub-result{padding:20px;font-size:19px}.hub-result strong{font-size:21px}.resource-branches{grid-template-columns:1fr;gap:11px}.resource-branches div{padding:16px}.resource-branches strong{font-size:15px;margin-bottom:7px}.resource-branches p{font-size:13px}.recommend-row{grid-template-columns:30px 1fr 65px;gap:12px;padding:22px 0}.recommend-row h3{font-size:19px}.recommend-row p{grid-column:2/-1;font-size:14px}.recommend-row a{grid-column:3;grid-row:auto;font-size:11px}.recommend-row .num{font-size:22px;grid-row:span 2}.cli-item{gap:10px;padding:11px}.cli-item small{display:none}.cli-item code{font-size:12px}.checks{gap:11px}.check-card{padding:18px 14px;font-size:15px;gap:16px}.url-form{flex-direction:column}.case-visual{grid-template-columns:1fr;gap:20px}.company-name{font-size:36px}.case-steps div{font-size:19px;padding:14px 0}.actual-page p{font-size:19px}.actual-page img{max-height:360px}.image-flow div{font-size:17px}.timer-clock{font-size:95px}.timer-text{font-size:21px}.timer-text small{margin-bottom:12px}.timer-controls{margin-top:20px}.roi-fields{gap:12px}.roi-total{padding:25px}.roi-total strong{font-size:65px}.security-paths div{padding:23px}.security-paths h3{font-size:20px}dialog{padding:23px}.dialog-head h2{font-size:22px}.notes-dialog{width:100%}.resource-list strong{font-size:15px}.resource-list span{font-size:11px}.content-card{padding:21px}.content-card .large{font-size:23px}}
@media print{.topbar,.bottombar,.progress-track,.scene-buttons,.motion-controls{display:none}#stage{padding:0;min-height:0}body{background:white}.visual-stage,.content-card{break-inside:avoid}button{display:none}}
/* Final projection and mobile refinements. */
html{scroll-padding-bottom:100px}.wide-gap{display:inline}.illustration-wide img{max-height:350px}.cli-list{grid-template-columns:1fr 1fr}.cli-item{padding:10px 14px}.flow-node{opacity:.68}.flow-node.current,.flow-node.past{opacity:1}.api-simulator{display:grid;grid-template-columns:1fr 100px 1fr;gap:10px;align-items:center}.api-simulator .window-body{min-height:210px}.api-simulator select{display:block;margin:8px 0 16px;padding:10px 12px;min-width:160px;border:1px solid var(--line);border-radius:7px;background:var(--white);font:inherit}.api-answer{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--line);padding:14px 0 8px;font-size:14px}.api-answer strong{font-size:29px}.api-wire{position:relative;height:80px;display:grid;place-items:center}.api-wire:before{content:'';position:absolute;left:0;right:0;top:40px;border-top:2px solid var(--line)}.api-packet{position:relative;z-index:1;background:var(--lime);border-radius:6px;padding:7px 9px;font-size:11px;font-weight:750}.api-packet.phase-0{opacity:.4}.api-packet.phase-1{animation:request-flight .65s ease-out both}.api-packet.phase-2{animation:response-flight .65s ease-out both}.api-data{display:flex;justify-content:space-between;gap:15px;padding:14px;border-radius:6px;font-size:17px}.api-data.selected{background:var(--lime-light);outline:1px solid var(--sage)}@keyframes request-flight{from{transform:translateX(-27px)}to{transform:translateX(27px)}}@keyframes response-flight{from{transform:translateX(27px)}to{transform:translateX(-27px)}}
@media(max-width:760px){.wide-gap{display:none}.header-actions #notes{display:inline-flex}.cli-list{grid-template-columns:1fr}.api-simulator{grid-template-columns:1fr;gap:0}.api-simulator .window-body{min-height:0;padding:18px}.api-wire{height:60px}.api-wire:before{left:50%;right:auto;top:0;bottom:0;height:100%;border-top:0;border-left:2px solid var(--line)}.api-packet.phase-1,.api-packet.phase-2{animation:none}.api-answer strong{font-size:24px}.api-data{font-size:15px;padding:10px}.illustration-wide img{max-height:none}}
body.present #contents,body.present .bottombar>button{display:none}body.present .bottombar{justify-content:center}
@media(min-width:761px){.api-simulator .window-body{padding:14px;min-height:170px}.api-simulator select{padding:7px 10px;margin:5px 0 9px}.api-answer{padding:8px 0 4px}.api-answer strong{font-size:24px}.api-data{padding:10px 14px}}