
:root{--bg:#f7f8ff;--ink:#272b60;--accent:#f3ac38;--deep:#1e224d;--paper:#ffffff;--line:#dee5e7;--muted:#576871;--radius:15px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:system-ui,-apple-system,"Noto Sans KR","Malgun Gothic",sans-serif;font-size:16px;line-height:1.9;word-break:keep-all}a{color:inherit;text-decoration:none}a:hover{text-decoration:underline}button,input,select{font:inherit}button{cursor:pointer}input:focus-visible,select:focus-visible,a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:3px}.container{width:min(1120px,calc(100% - 42px));margin:auto}.skip{position:absolute;top:-100px;left:10px;background:#fff;padding:10px;z-index:100}.skip:focus{top:10px}.noticebar{background:var(--deep);color:white;font-size:12px;letter-spacing:.5px;padding:7px 0}.site-header{background:var(--paper);border-bottom:1px solid var(--line);position:relative;z-index:5}.nav{display:flex;gap:24px;align-items:center;justify-content:space-between;padding:20px 0}.brandmark{display:flex;gap:12px;align-items:center;font-weight:950;font-size:23px;letter-spacing:-1.1px;line-height:1.3}.brandicon{display:inline-grid;place-items:center;width:44px;height:44px;border-radius:13px;background:var(--accent);color:#fff;font-size:25px}.brandmark small{display:block;font-size:11px;color:var(--muted);font-weight:700;letter-spacing:2px}.navlinks{display:flex;gap:7px;flex-wrap:wrap;font-size:13px;font-weight:800}.navlinks a{padding:8px 10px;border-radius:8px}.navlinks a:hover{background:var(--bg);text-decoration:none}.home-hero{margin:33px 0 42px;padding:56px 54px;display:grid;grid-template-columns:1.3fr .7fr;align-items:center;gap:25px;overflow:hidden}.kicker,.eyebrow{font-weight:850;font-size:12px;letter-spacing:2px;line-height:1.7}.home-hero h1{font-size:clamp(31px,4.7vw,58px);letter-spacing:-2.8px;line-height:1.25;margin:13px 0 17px;font-weight:950}.lead{font-size:18px;max-width:700px;line-height:1.75;margin:0}.artboard{position:relative;min-height:270px;display:grid;place-items:center}.art-symbol{display:grid;place-items:center;position:relative;width:205px;height:205px;border-radius:38px;transform:rotate(-8deg);font-size:107px;font-weight:900;box-shadow:18px 18px 0 rgba(10,20,40,.08)}.art-mini{position:absolute;padding:5px 12px;border-radius:100px;background:#fff;color:var(--deep);font-size:12px;font-weight:900;box-shadow:0 8px 20px rgba(0,0,0,.08)}.art-mini.one{top:7%;left:5%}.art-mini.two{bottom:6%;right:0}.block-heading{margin:0 0 12px;font-size:28px;font-weight:950;letter-spacing:-1px}.block-desc{margin:0 0 24px;color:var(--muted)}.cardgrid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin:19px 0 53px}.topic-card{display:flex;min-height:178px;flex-direction:column;gap:8px;padding:23px;background:var(--paper);border:1px solid var(--line);transition:transform .2s,box-shadow .2s}.topic-card:hover{transform:translateY(-4px);box-shadow:0 12px 25px #142e4012;text-decoration:none}.topic-card strong{font-size:21px;line-height:1.3}.topic-card .num{font-size:12px;font-weight:900;letter-spacing:2px;color:var(--muted)}.topic-card .desc{color:var(--muted);font-size:13px;flex:1;line-height:1.6}.topic-card .go{font-size:14px;font-weight:900;color:var(--accent)}.guide-row{display:grid;grid-template-columns:1fr 1fr;gap:23px;margin:40px 0 70px}.guidepanel{background:var(--paper);padding:29px;border:1px solid var(--line)}.guidepanel h2{margin:0 0 12px;font-size:23px}.guidepanel p{margin:0 0 14px}.guidepanel li{margin:6px 0}.detail-layout{display:grid;grid-template-columns:minmax(0,1fr) 248px;gap:36px;align-items:start;margin-top:44px;margin-bottom:65px}.detail-layout article{min-width:0}.breadcrumbs{font-size:13px;color:var(--muted);margin-bottom:23px}.breadcrumbs a{text-decoration:underline}.article-title{font-size:clamp(30px,3.4vw,45px);letter-spacing:-1.9px;line-height:1.3;font-weight:950;margin:12px 0 22px}.article-intro{font-size:18px;line-height:1.9;color:var(--muted);margin:0 0 25px}.chiprow{display:flex;gap:9px;flex-wrap:wrap;margin:15px 0 24px}.chip{background:var(--paper);border:1px solid var(--line);padding:3px 12px;font-weight:750;font-size:12px;border-radius:100px}.article-section{margin:32px 0;padding-top:11px;line-height:1.95}.article-section h2{font-size:25px;line-height:1.38;letter-spacing:-.8px;margin:0 0 17px}.article-section p{margin:0 0 15px;font-size:16px}.article-section ul{padding-left:20px}.article-section li{margin-bottom:9px}.site-footer{background:var(--deep);padding:38px 0 48px;color:#e5e9ef;font-size:13px}.site-footer strong{font-size:19px}.site-footer p{color:#ccd5df;max-width:700px}.footerlinks{display:flex;gap:19px;flex-wrap:wrap;margin-top:20px}.sidebar{position:sticky;top:18px;padding:19px;background:var(--paper);border:1px solid var(--line)}.sidebar h2{font-size:17px;margin:0 0 17px;line-height:1.5}.sidebar a{display:block;padding:11px 7px;border-bottom:1px solid var(--line);font-size:14px;font-weight:700}.sidebar a:last-child{border:0}.sidebar a[aria-current=page]{color:var(--accent);font-weight:950}.tool{background:var(--paper);border:1px solid var(--line);padding:23px;margin:17px 0 19px;overflow:hidden}.tool h2{font-size:23px;margin:0 0 14px}.tool p{font-size:14px;color:var(--muted)}.tool-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:14px}.tool label{display:block;font-size:13px;font-weight:850;margin:0 0 7px}.tool input,.tool select{background:#fff;color:#14202e;padding:12px 13px;border:1px solid #b9c6cb;border-radius:10px;width:100%;min-height:45px}.tool button,.action{background:var(--deep);color:#fff;border:0;border-radius:8px;padding:11px 17px;font-weight:900}.tool button:hover,.action:hover{filter:brightness(1.12)}.tool-result{margin:18px 0 0;border-left:4px solid var(--accent);background:var(--bg);padding:16px 18px;border-radius:6px;min-height:65px;font-size:15px;font-weight:750}.tool-hint{font-size:13px!important;color:var(--muted)!important}.table-scroll{overflow-x:auto;margin:20px 0}.table-scroll table,table{width:100%;border-collapse:collapse;font-size:14px;text-align:left}.table-scroll th,.table-scroll td,th,td{padding:11px 13px;border:1px solid var(--line)}.table-scroll th,th{background:#f3f5f5}.faq{background:var(--paper);padding:26px;border:1px solid var(--line)}.faq details{border-bottom:1px solid var(--line);padding:14px 0}.faq details:last-child{border:0}.faq summary{font-weight:850;cursor:pointer;font-size:16px}.faq details p{padding-top:11px;font-size:14px}.related-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.related-grid a{display:block;padding:13px;background:var(--paper);border:1px solid var(--line);font-weight:800}.sourcebox{font-size:13px;color:var(--muted);background:var(--paper);border:1px solid var(--line);padding:20px;margin:30px 0}.sourcebox a{text-decoration:underline}.ad-container{margin:27px 0;min-height:92px;overflow:hidden}.ad-label{font-size:10px;color:var(--muted);text-align:center;letter-spacing:2px}.note{background:var(--paper);border-left:4px solid var(--accent);padding:18px}.scenario{background:#fff;border:1px solid var(--line);padding:22px 25px;margin:19px 0 27px}.scenario strong{font-size:18px}.scenario p{margin:9px 0 0}.screen-only{display:block}.drawing-stage{display:flex;align-items:center;justify-content:center;aspect-ratio:4/3;background:#fff;border:2px dashed #b5bbc9;border-radius:14px}.drawing-stage svg{width:100%;max-height:380px}.draw-toolbar{display:flex;gap:8px;flex-wrap:wrap;margin:16px 0}.draw-toolbar button{border:1px solid var(--line);background:var(--deep);color:white;padding:11px 16px;border-radius:7px;font-size:14px;font-weight:900}.draw-toolbar button:hover{filter:brightness(1.12)}.step-copy{font-weight:900;font-size:15px;color:var(--muted)}.print-worksheet{display:none}.simple-page{min-height:62vh;max-width:790px;padding:50px 0 80px}.simple-page h1{font-size:40px;line-height:1.35}.simple-page p{font-size:16px}
@media(max-width:870px){.nav{flex-direction:column;align-items:flex-start}.navlinks{justify-content:flex-start}.home-hero{grid-template-columns:1fr}.artboard{min-height:150px}.art-symbol{width:155px;height:155px;font-size:75px}.detail-layout{grid-template-columns:1fr}.sidebar{position:static;display:grid;grid-template-columns:repeat(2,1fr);gap:0 14px}.sidebar h2{grid-column:1/-1}.cardgrid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:540px){.container{width:calc(100% - 28px)}.home-hero{padding:31px 23px;margin:20px 0 35px}.artboard{display:none}.cardgrid,.guide-row,.tool-grid,.related-grid{grid-template-columns:1fr}.guidepanel{padding:23px}.article-title{font-size:29px}.article-section h2{font-size:22px}.sidebar{grid-template-columns:1fr}.topic-card{min-height:140px}}
@page{size:A4;margin:12mm}@media print{body{background:white;color:black}.noticebar,.site-header,.site-footer,.sidebar,.ad-container,.breadcrumbs,.home-hero,.cardgrid,.related-grid,.sourcebox,.draw-toolbar,.screen-only,.tool,.scenario,.guide-row{display:none!important}.container,.detail-layout{display:block!important;width:100%!important;margin:0!important}.article-title{font-size:24px}.article-section{break-inside:avoid}.article-section p{font-size:11pt}.print-worksheet{display:block!important;break-before:auto}.detail-layout article>:not(.print-worksheet){display:none!important}.worksheet-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.worksheet-box{height:175px;border:1px solid #bbb;break-inside:avoid;padding:5px}.worksheet-box svg{width:100%;height:132px}.worksheet-title{font-size:10px}.practice-box{border:1px dashed #aaa;height:150px}.drawing-stage{display:none}}
body{background-image:radial-gradient(circle at 96% 5%,#dfe4ff 0,#f7f8ff 33%)}.noticebar{background:#1e224d}.home-hero{background:linear-gradient(125deg,#303875,#1f2450);color:#fff;border-radius:22px}.home-hero .lead{color:#e6e8ff}.home-hero .kicker{color:#f3bd68}.art-symbol{border-radius:50%;background:#f3ac38;color:#1e224d;box-shadow:0 0 0 24px #ffffff16,0 0 0 49px #ffffff10}.topic-card{border-radius:15px;box-shadow:0 7px 16px #363a5910}.topic-card .go{color:#7257ac}.guidepanel{border-radius:17px}.tool{border-radius:17px;border-top:5px solid #f3ac38}.tool-result{background:#f8f2e8}.scenario{background:#fff8e9;border:1px dashed #e1bc70;border-radius:12px}.sidebar{border-radius:14px}.article-section h2:before{content:'▸';color:#f3ac38;margin-right:11px}