:root{--bg:#f7f3ed;--ink:#17262b;--accent:#d2ef62;--aux:#bd5935;--paper:#fffefa;--line:#e0ddd4;--muted:#596761}
*{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;line-height:1.85;word-break:keep-all}a{color:inherit;text-decoration:none}button,input,select{font:inherit}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--aux);outline-offset:3px}.container{width:min(1180px,calc(100% - 40px));margin:auto}.topline{background:var(--ink);color:var(--bg);font-size:12px;letter-spacing:2px;text-transform:uppercase;padding:6px 0}.nav{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:23px 0;border-bottom:1px solid var(--line)}.logo{font-size:22px;letter-spacing:-1px;font-weight:900}.logo small{display:block;font-size:10px;letter-spacing:2px;color:var(--muted);line-height:1.2}.navlinks{display:flex;gap:17px;flex-wrap:wrap;font-size:14px;font-weight:700}.navlinks a:hover,.textlink:hover{text-decoration:underline}.hero{padding:68px 0 45px;display:grid;grid-template-columns:1.2fr .8fr;gap:35px;align-items:end}.eyebrow{font-weight:900;text-transform:uppercase;letter-spacing:3px;font-size:12px}.hero h1{font-size:clamp(38px,5vw,75px);line-height:1.13;letter-spacing:-3px;max-width:900px;margin:12px 0 23px;font-weight:900}.lead{font-size:18px;color:var(--muted);line-height:1.95;max-width:750px}.hero-mark{border:2px solid var(--ink);border-radius:1000px;height:265px;display:grid;place-items:center;font-size:130px;background:var(--accent);color:#20342f;transform:rotate(-5deg)}.chiprow{display:flex;gap:8px;flex-wrap:wrap;margin:20px 0}.chip{border:1px solid var(--line);padding:5px 12px;border-radius:30px;font-size:12px;color:var(--muted)}.section-heading{font-size:29px;letter-spacing:-1px;margin:50px 0 18px}.cardgrid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:17px}.topic-card{border:1px solid var(--line);border-radius:19px;background:var(--paper);padding:22px;min-height:214px;display:flex;flex-direction:column;gap:10px;transition:transform .15s,border-color .15s}.topic-card:hover{transform:translateY(-4px);border-color:var(--aux)}.topic-card strong{font-size:21px;line-height:1.35}.topic-card span{color:var(--muted);font-size:14px}.topic-card .go{margin-top:auto;font-size:12px;font-weight:900;letter-spacing:.5px;color:var(--aux)}.detail-layout{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:38px;align-items:start;padding:40px 0 80px}.breadcrumbs{color:var(--muted);font-size:13px;margin:0 0 20px}.article-title{font-size:clamp(30px,4vw,52px);line-height:1.28;letter-spacing:-1.9px;margin:4px 0 17px}.article-intro{font-size:18px;font-weight:600;color:var(--muted)}.article-section{margin-top:47px}.article-section h2{font-size:26px;line-height:1.3;letter-spacing:-.8px;margin:0 0 21px;padding-left:16px;border-left:5px solid var(--accent)}.article-section p{margin:0 0 15px;font-size:16px;line-height:2.02}.article-section li{padding:6px 0;line-height:1.8}.article-section ol,.article-section ul{padding-left:24px}.sidebar{position:sticky;top:25px;border-radius:19px;border:1px solid var(--line);background:var(--paper);padding:22px}.sidebar h3{margin:0 0 14px}.sidebar a{display:block;padding:8px 0;font-size:14px;border-bottom:1px solid var(--line)}.sidebar a:hover{text-decoration:underline}.ad-container{margin:35px 0;padding:8px 0;min-height:100px}.ad-label{text-align:center;font-size:10px;color:var(--muted);letter-spacing:2px}.table-scroll{overflow:auto;margin:22px 0;border-radius:12px;border:1px solid var(--line)}table{border-collapse:collapse;width:100%;min-width:490px;background:var(--paper)}th,td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line);font-size:14px}th{background:var(--accent);color:#1b302d}.tool{margin:30px 0 38px;background:var(--paper);border:2px solid var(--accent);padding:26px;border-radius:18px}.tool h2{margin:0 0 8px;font-size:24px}.tool p{font-size:14px;color:var(--muted)}.tool-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:13px;margin-top:15px}.tool label{display:block;font-size:13px;font-weight:800;margin-bottom:5px}.tool input,.tool select{background:var(--bg);color:var(--ink);padding:11px;border:1px solid var(--line);width:100%;border-radius:8px}.tool button,.action{background:var(--accent);color:#20342f;border:0;border-radius:10px;font-weight:900;padding:13px 22px;cursor:pointer}.tool-result{margin-top:15px;border-left:5px solid var(--aux);background:var(--bg);padding:14px 18px;font-size:15px;min-height:60px}.tool-hint{font-size:12px!important;color:var(--muted)!important}.faq details{padding:15px 0;border-bottom:1px solid var(--line)}.faq summary{cursor:pointer;font-weight:850;font-size:17px}.faq p{padding:15px 0 3px;font-size:15px}.related-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:13px}.related-grid a{background:var(--paper);padding:19px;border:1px solid var(--line);border-radius:10px;font-weight:850}.sourcebox{font-size:13px;color:var(--muted);border:1px solid var(--line);padding:18px;border-radius:12px;background:var(--paper);margin-top:38px}.sourcebox a{text-decoration:underline}.site-footer{border-top:1px solid var(--line);padding:37px 0 65px;font-size:13px;color:var(--muted)}.footerlinks{display:flex;gap:20px;flex-wrap:wrap}.note{padding:18px;border-left:4px solid var(--aux);background:var(--paper);border-radius:0 8px 8px 0}.print-worksheet{display:none}.drawing-stage{display:flex;align-items:center;justify-content:center;aspect-ratio:4/3;background:white;border:2px dashed #b5c3bc;border-radius:12px}.drawing-stage svg{width:100%;max-height:380px}.draw-toolbar{display:flex;gap:10px;flex-wrap:wrap;margin:16px 0}.draw-toolbar button{padding:10px 16px;border-radius:9px;border:1px solid var(--line);background:var(--accent);color:#20342f;cursor:pointer;font-weight:900}.step-copy{font-weight:800;font-size:15px;color:var(--muted)}
@media(max-width:850px){.hero{grid-template-columns:1fr;padding-top:45px}.hero-mark{height:150px;font-size:80px}.detail-layout{grid-template-columns:1fr}.sidebar{position:static}.cardgrid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:540px){.container{width:min(100% - 26px,1180px)}.nav{align-items:flex-start;flex-direction:column}.navlinks{gap:12px}.hero h1{letter-spacing:-2px}.cardgrid,.related-grid,.tool-grid{grid-template-columns:1fr}.article-section h2{font-size:23px}.topic-card{min-height:160px}}
@page{size:A4;margin:12mm}@media print{body{background:#fff;color:#000}.topline,.nav,.site-footer,.sidebar,.ad-container,.breadcrumbs,.hero,.cardgrid,.sourcebox,.related-grid,.draw-toolbar,.screen-only,.tool{display:none!important}.container,.detail-layout{display:block;width:100%;padding:0}.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(2,1fr);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}}