:root{--paper:#f6f5f0;--ink:#222a26;--muted:#72776f;--green:#285546;--line:#dddcd3;--soft:#e9ece3;--white:#fff;--serif:"Iowan Old Style","AppleMyungjo","Batang",serif;--sans:-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Noto Sans KR","Malgun Gothic",sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{font:inherit}a,button{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible{outline:3px solid #6e9676;outline-offset:5px}::selection{background:#dce6d2}button{cursor:pointer}.skip-link{position:fixed;top:-100px;left:20px;z-index:100;background:var(--green);color:white;padding:12px 20px}.skip-link:focus{top:16px}
.site-header{border-bottom:1px solid var(--line)}.header-inner{max-width:1152px;margin:auto;min-height:100px;padding:20px 32px;display:flex;justify-content:space-between;align-items:center;gap:20px}.brand{display:flex;align-items:center;gap:12px;font-size:17px;font-weight:700;letter-spacing:-.5px;line-height:1.35}.brand-mark{display:flex;justify-content:center;align-items:center;width:38px;height:46px;border:1px solid #d4d7cc;border-bottom:5px solid var(--green);border-radius:6px;background:#fffefa;color:var(--green);font-family:serif;font-size:28px;line-height:1}.brand-sub{display:block;color:var(--muted);font-size:8px;letter-spacing:1.55px;font-weight:500;margin-top:6px}.header-inner nav{display:flex;gap:30px;align-items:center}.header-link{font-size:13px;color:var(--muted)}.header-link.active{color:var(--green);font-weight:700}.header-link:hover{color:var(--ink)}.header-link span{margin-left:5px}
.library{max-width:1152px;margin:auto;padding:0 32px}.intro{display:grid;grid-template-columns:1fr 310px;gap:40px;align-items:center;padding:74px 0 70px}.eyebrow{display:flex;align-items:center;gap:10px;font-size:11px;letter-spacing:1.5px;color:var(--green);font-weight:700;margin:0 0 24px}.tiny-line{width:24px;height:1px;background:var(--green)}h1{font-family:var(--serif);font-weight:500;font-size:clamp(32px,3.6vw,48px);line-height:1.45;letter-spacing:-2px;margin:0;text-wrap:balance}.intro-copy{font-size:15px;line-height:1.95;color:var(--muted);margin:22px 0 28px}.primary-button{display:inline-flex;align-items:center;justify-content:center;gap:34px;min-height:47px;padding:12px 20px;background:var(--green);border:1px solid var(--green);border-radius:3px;color:#fff;font-size:13px;transition:background .2s,transform .2s}.primary-button:hover{background:#1d4034;transform:translateY(-1px)}.primary-button span{font-size:19px;line-height:1}
.tile-composition{position:relative;height:290px;display:flex;align-items:center;justify-content:center;margin-right:20px}.tile-composition:before{content:"";position:absolute;width:260px;height:260px;background:radial-gradient(ellipse,#e7e9dd 0%,#efefe6 65%,transparent 66%);border-radius:50%}.tile{display:flex;align-items:center;justify-content:center;font-family:var(--serif);position:absolute;width:104px;height:144px;border-radius:13px;background:#fffdf5;border:1px solid #dad9ce;font-size:76px;line-height:1;box-shadow:0 10px 0 #6b8874,0 11px 0 #57725e,0 21px 22px #33452b14}.tile-back{color:#ac5c4e;transform:rotate(15deg) translate(43px,-14px);z-index:1}.tile-front{color:var(--green);transform:rotate(-13deg) translate(-37px,7px);z-index:2}.tile-caption{position:absolute;bottom:0;left:0;right:0;text-align:center;font-family:var(--serif);font-size:13px;letter-spacing:1.5px;color:#7a8172}
.catalog{padding:16px 0 68px}.section-heading{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--ink);padding-bottom:17px;margin-bottom:0}.section-heading h2{font-size:18px;font-weight:650;letter-spacing:-.4px;margin:0}.section-heading h2 span{font-size:12px;color:var(--green);margin-left:9px;font-weight:500;vertical-align:top}.available-label{font-size:11px;color:var(--muted);display:flex;align-items:center;gap:7px}.available-label i{background:#738965;height:5px;width:5px;border-radius:50%}.lesson-card{display:grid;grid-template-columns:88px 1fr 230px 40px;align-items:center;gap:24px;min-height:188px;padding:26px 6px;border-bottom:1px solid var(--line);transition:background .2s}.lesson-card:hover{background:#eeeee6}.card-number{align-self:start;padding-top:4px}.card-number span{font-size:8px;letter-spacing:1.6px;color:var(--muted);display:block}.card-number strong{font-family:var(--serif);font-size:44px;font-weight:400;letter-spacing:-1px;line-height:1.4;color:var(--green)}.card-copy h3{font-size:23px;font-weight:600;letter-spacing:-.7px;margin:0 0 7px}.card-copy p{font-size:12px;color:var(--muted);margin:0}.card-copy p span{margin:0 7px;color:#b0b2a8}.card-cta{display:inline-flex;gap:14px;margin-top:20px;font-size:11px;font-weight:600;color:var(--green)}.card-image{height:132px;overflow:hidden;border-radius:3px;background:#eceee6;border:1px solid #e4e4da}.card-image img{width:100%;height:100%;object-fit:cover;object-position:50% 0;display:block;filter:saturate(.72);transition:filter .2s,transform .3s}.lesson-card:hover img{filter:saturate(1);transform:scale(1.02)}.card-arrow{justify-self:end;font-size:25px;color:var(--green);font-weight:300;padding-right:5px}.catalog-note{font-size:12px;color:var(--muted);margin:22px 0 0}.site-footer{border-top:1px solid var(--line);max-width:1088px;margin:0 auto;display:flex;justify-content:space-between;align-items:flex-start;gap:32px;padding:26px 0 38px;color:var(--muted);font-size:10px;line-height:1.9}.site-footer>span:last-child{text-align:right}.site-footer a{display:inline-block;margin-top:5px;text-decoration:underline;text-underline-offset:3px}.footer-dot{margin:0 6px}
.reader{max-width:900px;margin:0 auto;padding:30px 30px 55px;transition:max-width .2s}.reader-page .header-inner{min-height:86px}.breadcrumb{font-size:11px;color:var(--muted);display:flex;gap:13px}.breadcrumb a:hover{color:var(--green)}.lesson-heading{padding:37px 0 30px;border-bottom:1px solid var(--line)}.lesson-heading .eyebrow{font-size:10px;margin-bottom:12px;letter-spacing:2px}.lesson-heading h1{font-size:40px;line-height:1.45;letter-spacing:-1.6px}.lesson-meta{margin-top:16px;display:flex;gap:0;font-size:11px;color:var(--muted);flex-wrap:wrap;align-items:center}.lesson-meta>span:not(:first-child):before,.lesson-meta>a:before{content:"·";color:#a9ada1;margin:0 12px}.lesson-meta a{text-decoration:underline;text-underline-offset:3px}.reading-tools{display:flex;justify-content:space-between;align-items:center;padding:14px 0;gap:16px}.reading-tools p{font-size:11px;color:var(--muted);margin:0}.width-toggle{background:transparent;border:1px solid var(--line);font-size:11px;color:var(--green);border-radius:3px;padding:6px 11px;min-height:34px}.width-toggle span{padding-left:10px}.width-toggle:hover,.width-toggle[aria-pressed=true]{background:var(--soft)}.lesson-content{background:#fff;box-shadow:0 0 0 1px #e7e7e0;overflow:hidden}.lesson-image{margin:0;padding:0;line-height:0}.lesson-image a{display:block;cursor:zoom-in}.lesson-image img{width:100%;height:auto;display:block;background:#fff}.original-text{padding:22px 30px;font-size:15px;line-height:1.95;overflow-wrap:anywhere;white-space:normal}.original-text:empty{display:none}.original-text+.original-text{padding-top:0}.lesson-end{text-align:center;padding:54px 0 42px}.end-mark{font-size:22px;color:var(--green);font-family:serif}.lesson-end p{font-size:11px;color:var(--muted);margin:8px 0}.lesson-end h2{font-family:var(--serif);font-size:23px;font-weight:500;letter-spacing:-.7px;margin:12px 0 24px}.lesson-end .primary-button{font-size:12px}.lesson-pagination{display:grid;grid-template-columns:1fr 60px 1fr;align-items:stretch;border-top:1px solid var(--line);border-bottom:1px solid var(--line);min-height:84px}.page-prev,.page-next{display:flex;align-items:center;gap:14px;font-size:13px;padding:14px 10px}.page-next{justify-content:flex-end;text-align:right}.lesson-pagination small{display:block;font-size:10px;font-weight:400;color:var(--muted);margin-bottom:2px}.lesson-pagination strong{font-size:12px;font-weight:500}.page-list{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:0;font-size:10px;color:var(--muted)}.list-icon{font-size:25px;line-height:1}.page-unavailable{color:#979b91;font-size:11px}.lesson-pagination a:hover{background:var(--soft)}.reading-progress{position:fixed;top:0;left:0;width:100%;height:3px;background:var(--green);transform-origin:left;transform:scaleX(0);z-index:40;pointer-events:none}.mobile-navigation{display:none}.wide-reader .reader{max-width:1240px}.reader-page .site-footer{margin-left:32px;margin-right:32px;max-width:none}
@media(min-width:1300px){.reader-page .site-footer{max-width:1088px;margin-left:auto;margin-right:auto}}
@media(max-width:800px){.header-inner{padding:18px 24px;min-height:84px}.header-inner nav{gap:20px}.library{padding:0 24px}.intro{grid-template-columns:1fr 200px;gap:12px;padding:55px 0}.intro h1{font-size:34px}.tile-composition{transform:scale(.8);transform-origin:right center;margin-right:0}.lesson-card{grid-template-columns:62px 1fr 160px 20px;gap:14px}.card-copy h3{font-size:20px}.card-image{height:114px}.card-number strong{font-size:37px}.site-footer{margin:0 24px}.reader{padding-left:24px;padding-right:24px}}
@media(max-width:560px){.header-inner{padding:16px 20px;min-height:78px;gap:10px}.brand{font-size:15px;gap:10px}.brand-mark{width:31px;height:39px;font-size:23px}.brand-sub{font-size:6px;letter-spacing:1.25px;margin-top:5px}.header-link{font-size:11px}.source-link{display:none}.library{padding:0 20px}.intro{display:block;position:relative;padding:42px 0 42px}.intro>div:first-child{position:relative;z-index:3}.intro .eyebrow{font-size:10px;letter-spacing:.8px;margin-bottom:19px}.intro h1{font-size:32px;line-height:1.5;letter-spacing:-1.65px}.intro-copy{font-size:12px;margin:18px 0 23px;line-height:1.9}.primary-button{font-size:11px;gap:22px;min-height:44px;padding:10px 15px}.tile-composition{display:none}.catalog{padding-top:7px;padding-bottom:42px}.section-heading{padding-bottom:13px}.section-heading h2{font-size:16px}.section-heading h2 span{font-size:10px}.available-label{font-size:9px}.lesson-card{grid-template-columns:42px 1fr 85px;min-height:150px;gap:12px;padding:22px 0}.card-number span{font-size:6px;letter-spacing:.9px}.card-number strong{font-size:30px;line-height:1.5}.card-copy h3{font-size:17px;letter-spacing:-.6px;line-height:1.45}.card-copy p{font-size:10px}.card-copy p span{margin:0 4px}.card-cta{font-size:10px;margin-top:14px;gap:9px}.card-image{height:87px}.card-arrow{display:none}.catalog-note{font-size:10px;margin-top:17px;word-break:keep-all}.site-footer{display:block;margin:0 20px;padding:22px 0 28px;font-size:9px}.site-footer>span{display:block}.site-footer>span:last-child{text-align:left;margin-top:9px}.reader-page .header-inner{min-height:78px}.reader{padding:23px 0 32px}.breadcrumb,.lesson-heading,.reading-tools{margin-left:20px;margin-right:20px}.breadcrumb{font-size:10px}.lesson-heading{padding-top:28px;padding-bottom:23px}.lesson-heading h1{font-size:29px;letter-spacing:-1px}.lesson-heading .eyebrow{font-size:9px}.lesson-meta{font-size:9px;margin-top:15px;row-gap:6px}.lesson-meta>span:not(:first-child):before,.lesson-meta>a:before{margin:0 8px}.reading-tools{padding:12px 0}.reading-tools p{font-size:10px}.width-toggle{display:none}.lesson-content{box-shadow:none}.original-text{padding:18px 20px;font-size:14px}.lesson-end{padding:38px 20px 26px}.lesson-end h2{font-size:20px}.lesson-end .primary-button{font-size:11px;gap:18px}.lesson-pagination.bottom{margin:0 20px;grid-template-columns:1fr 42px 1fr;min-height:76px}.nav-title{display:none}.lesson-pagination strong{font-size:11px}.page-prev,.page-next{font-size:11px;gap:9px;padding-left:5px;padding-right:5px}.page-unavailable{font-size:9px}.reader-page{padding-bottom:calc(66px + env(safe-area-inset-bottom))}.reader-page .site-footer{margin:0 20px}.mobile-navigation{display:block;position:fixed;left:0;right:0;bottom:0;z-index:20;background:#f6f5f0f5;backdrop-filter:blur(12px);padding:0 16px env(safe-area-inset-bottom);box-shadow:0 -2px 12px #26332108}.mobile-navigation .lesson-pagination{min-height:62px;border-bottom:0}.mobile-navigation .page-unavailable{font-size:9px}.mobile-navigation .page-prev,.mobile-navigation .page-next{padding-top:8px;padding-bottom:8px}.mobile-navigation small{font-size:9px}.mobile-navigation .list-icon{font-size:22px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important}}
.lesson-content{padding:24px 0}.lesson-image{margin:24px 32px}.lesson-image img{width:auto;max-width:100%;margin:0 auto}.original-text{max-width:800px;margin:0 auto;padding:14px 40px;font-size:16px;line-height:1.95;word-break:keep-all;overflow-wrap:anywhere}.original-text strong{font-weight:700;color:#182f25}.original-text.heading{font-size:20px;font-weight:700;line-height:1.65;padding-top:30px;padding-bottom:20px}.original-text:last-child{padding-bottom:20px}
@media(max-width:560px){.lesson-content{padding:16px 0}.lesson-image{margin:20px 0}.original-text{font-size:15px;padding:12px 22px;line-height:1.95}.original-text.heading{font-size:18px;padding-top:24px;padding-bottom:18px}}
.original-text a{color:var(--green);text-decoration:underline;text-underline-offset:3px}.original-text a:hover{text-decoration-thickness:2px}
.lesson-image.hand{max-width:800px;padding:0 40px;margin:26px auto}.lesson-image.hand img{width:100%;max-width:100%}
@media(max-width:560px){.lesson-image.hand{padding:0 22px;margin:22px auto}}
.image-recovery-caption{margin:10px auto 0;padding:0 8px;max-width:800px;color:var(--muted);font-size:11px;line-height:1.7;overflow-wrap:anywhere;text-align:center}.lesson-image .image-recovery-caption a{display:inline;color:var(--green);cursor:pointer;text-decoration:underline;text-underline-offset:3px}.image-recovery-caption a:hover{text-decoration-thickness:2px}