:root{--bg:#F7F7F5;--surface:#fff;--green:#355C45;--ink:#1F2521;--muted:#5F6862;--line:#E0E4E0;--soft:#eaf0ea}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:'Apple SD Gothic Neo','Malgun Gothic',system-ui,sans-serif;font-size:16px;line-height:1.7}a{color:inherit;text-decoration:none}a:hover{color:var(--green)}button,input{font:inherit}button,a,input,summary{outline-offset:5px}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--green)}button{cursor:pointer}.skip{position:fixed;left:12px;top:-90px;background:white;padding:10px;z-index:100}.skip:focus{top:10px}.sidebar{position:fixed;inset:0 auto 0 0;width:250px;padding:36px 25px;background:#f0f2ed;border-right:1px solid var(--line);display:flex;flex-direction:column;z-index:20}.brand{display:block;line-height:1.4;font-size:22px;font-weight:750;letter-spacing:-.7px}.brand small{display:block;font:11px/2 system-ui;letter-spacing:2px;color:var(--green);margin-top:8px}.brand-mark{display:inline-grid;place-items:center;background:var(--green);color:white;width:36px;height:36px;margin-bottom:15px;font-family:Georgia,serif;font-size:20px}.nav-label{font-size:12px;letter-spacing:1px;color:var(--muted);margin:38px 12px 12px}.nav{display:grid;gap:5px}.nav a{padding:10px 13px;border-radius:5px;font-size:15px}.nav a.active{background:var(--green);color:#fff;font-weight:650}.nav a:not(.active):hover{background:#e4eae2}.nav a span{display:inline-block;width:28px;opacity:.7;font-size:12px}.side-note{margin-top:auto;padding-top:24px;border-top:1px solid #d8dfd5;font-size:13px;color:var(--muted)}.side-note strong{display:block;color:var(--green);font-size:14px;margin-bottom:6px}.shell{margin-left:250px;max-width:1350px}.topbar{height:75px;padding:0 48px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);font-size:13px;color:var(--muted);gap:20px}.topbar strong{color:var(--ink);font-weight:500}.mobile-toggle{display:none;background:none;border:1px solid var(--line);padding:7px 11px;border-radius:4px}.main{padding:42px 48px 65px;max-width:1130px}.eyebrow{font-size:12px;letter-spacing:2px;color:var(--green);font-weight:650;margin:0 0 12px}.page-title{font-family:'AppleMyungjo','Batang',Georgia,serif;font-size:40px;line-height:1.35;letter-spacing:-1.3px;margin:0 0 13px;font-weight:650}.lead{color:var(--muted);margin:0;max-width:690px;line-height:1.9}.intro{margin-bottom:30px}.search-form{display:flex;align-items:center;background:#fff;border:1px solid #c8d4c9;border-radius:6px;padding:5px 6px 5px 18px;gap:12px;max-width:720px;margin:25px 0 12px}.search-form svg{width:20px;flex-shrink:0;color:var(--green)}.search-form input{width:100%;min-width:0;border:0;background:none;padding:9px 0;color:var(--ink)}.search-form button,.button{display:inline-block;border:1px solid var(--green);background:var(--green);color:white;border-radius:4px;padding:9px 18px;white-space:nowrap;font-size:14px}.button.secondary{background:white;color:var(--green)}.hint{font-size:13px;color:var(--muted)}.quick{display:flex;gap:10px;align-items:center;flex-wrap:wrap;font-size:13px;color:var(--muted)}.quick a{border-bottom:1px solid #a8b9aa;color:var(--green)}.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:20px;margin:38px 0 16px}.section-head h2,h2{font-size:21px;letter-spacing:-.5px;line-height:1.5;margin:0}.text-link{font-size:14px;color:var(--green);border-bottom:1px solid #b3c2b5}.topic-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));border-top:1px solid var(--line);border-left:1px solid var(--line);background:white}.topic-tile{padding:22px 24px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);display:grid;grid-template-columns:30px 1fr;gap:16px;min-height:136px;transition:background .15s}.topic-tile:hover{background:#f0f5ef}.topic-tile .number{font-family:Georgia,serif;color:#758c77;font-size:19px}.topic-tile h3{margin:0 0 7px;font-size:18px}.topic-tile p{margin:0;color:var(--muted);font-size:14px}.topic-tile .topic-terms{margin-top:7px;color:var(--green);font-size:12px}.feature{margin:26px 0;display:flex;align-items:center;justify-content:space-between;gap:24px;background:var(--green);color:white;padding:25px 30px;border-radius:3px}.feature p{color:#e0e9df;margin:5px 0 0;font-size:14px}.feature h2{font-family:'AppleMyungjo','Batang',serif;font-size:24px}.feature .button{border-color:#adc0b0;color:white}.badge{display:inline-block;font-size:12px;color:var(--muted);background:#eef1ec;padding:2px 8px;border-radius:3px;white-space:nowrap}.book-list{border-top:1px solid var(--line)}.book-row{display:grid;grid-template-columns:38px minmax(0,1fr) 170px;align-items:center;gap:18px;padding:18px 2px;border-bottom:1px solid var(--line)}.book-row:hover{background:#eef2eb}.book-num{font-family:Georgia,serif;font-size:20px;color:#8b9c8a}.book-row h3{font-size:17px;margin:0}.book-row p{font-size:14px;color:var(--muted);margin:4px 0 0}.book-role{font-size:13px;color:var(--green);text-align:right}.footer{border-top:1px solid var(--line);padding:24px 48px;display:flex;justify-content:space-between;gap:20px;color:var(--muted);font-size:12px}.meta{display:flex;flex-wrap:wrap;gap:10px 20px;font-size:13px;color:var(--muted);margin-top:20px}.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:22px}.breadcrumb a{text-decoration:underline;text-underline-offset:4px}.tabs{display:flex;gap:26px;border-bottom:1px solid var(--line);margin:30px 0;overflow:auto;white-space:nowrap}.tabs a{padding:9px 1px 12px;font-size:14px}.tabs a:first-child{border-bottom:2px solid var(--green);color:var(--green)}.reading{max-width:750px}.reading h2{margin:36px 0 14px;scroll-margin-top:20px}.reading h3{font-size:17px;margin:26px 0 10px}.reading p,.reading li{line-height:1.95}.reading li{margin-bottom:8px}.reading ul{padding-left:22px}.reading table{border-collapse:collapse;width:100%;font-size:14px}.reading td,.reading th{border:1px solid var(--line);padding:10px;text-align:left}.reading th{background:var(--soft)}.detail-layout{display:grid;grid-template-columns:minmax(0,1fr) 200px;gap:35px}.toc{border-left:1px solid var(--line);padding-left:20px;position:sticky;top:28px;align-self:start;font-size:14px}.toc strong{display:block;margin-bottom:12px}.toc a{display:block;color:var(--muted);margin:8px 0}.empty{border:1px dashed #c7d2c7;padding:25px 28px;border-radius:4px;margin:18px 0;background:#fafbf8}.empty h3{margin:0 0 6px;font-size:17px}.empty p{color:var(--muted);font-size:14px;margin:0}.facts{display:grid;grid-template-columns:120px 1fr;gap:10px 20px;font-size:14px;padding:23px;background:#eff2ec}.facts dt{color:var(--muted)}.facts dd{margin:0}.related{display:flex;flex-wrap:wrap;gap:10px}.chip{background:white;border:1px solid var(--line);padding:7px 12px;border-radius:4px;font-size:14px}.chip:hover{border-color:var(--green)}details{border-top:1px solid var(--line);padding:16px 0}summary{cursor:pointer;font-weight:600}details p{font-size:14px;color:var(--muted)}.result{padding:20px 0;border-bottom:1px solid var(--line)}.result h2{font-size:19px}.result p{font-size:14px;color:var(--muted);margin:5px 0}.results-count{font-size:14px;color:var(--muted)}.filter-tabs{display:flex;flex-wrap:wrap;gap:9px;margin:22px 0}.filter-tabs button{border:1px solid var(--line);background:white;padding:7px 16px;border-radius:4px;color:var(--muted)}.filter-tabs button[aria-pressed=true]{background:var(--green);border-color:var(--green);color:white}.index-letter{margin:30px 0 5px;color:var(--green);font-family:Georgia,serif;font-size:22px}.index-row{padding:17px 0;border-bottom:1px solid var(--line);display:flex;gap:16px;justify-content:space-between}.index-row small{display:block;color:var(--muted);font-size:13px}.index-row p{margin:4px 0 0;font-size:14px;color:var(--muted)}.notice{font-size:14px;border-left:3px solid #a8bfa8;padding-left:16px;color:var(--muted);margin:20px 0}.mobile-overlay{display:none}[hidden]{display:none!important}@media(min-width:1600px){.main{padding-top:55px}}@media(max-width:1150px){.sidebar{width:220px;padding:30px 18px}.shell{margin-left:220px}.main{padding:32px}.topbar,.footer{padding-left:32px;padding-right:32px}.detail-layout{grid-template-columns:1fr}.toc{display:none}}@media(max-width:760px){.sidebar{transform:translateX(-100%);width:265px;transition:transform .2s}.sidebar.open{transform:translateX(0)}.shell{margin-left:0}.topbar{height:65px;padding:0 20px}.topbar .desktop-only{display:none}.mobile-toggle{display:block}.main{padding:28px 20px 45px}.page-title{font-size:32px}.topic-grid{grid-template-columns:1fr}.topic-tile{min-height:110px;padding:19px}.feature{padding:23px;align-items:flex-start;flex-direction:column;gap:16px}.book-row{grid-template-columns:26px 1fr;gap:13px}.book-role{grid-column:2;text-align:left;margin-top:-12px}.footer{padding:24px 20px;flex-direction:column;gap:8px}.mobile-overlay.show{display:block;position:fixed;inset:0;background:#0005;z-index:19}.facts{grid-template-columns:1fr;gap:5px}.facts dd{margin-bottom:10px}.index-row{flex-wrap:wrap}.tabs{gap:22px}.search-form{padding-left:12px}.search-form button{padding:9px 13px}.section-head h2{font-size:20px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
/* Korean-only book contents */
.book-toc{margin:20px 0 28px;border:1px solid var(--line);border-radius:5px;background:white;overflow:hidden}.book-toc details{padding:0;border:0;border-top:1px solid var(--line)}.book-toc>details:first-child{border-top:0}.book-toc summary{padding:15px 19px;line-height:1.7;font-size:16px;font-weight:500;overflow-wrap:anywhere;list-style-position:outside;margin-left:18px}.book-toc-group>summary{background:#edf2eb;font-weight:650;margin-left:0;padding-left:26px;list-style-position:inside}.book-toc-group .book-toc-group>summary{background:#f6f8f3;font-size:15px}.book-toc-children{margin-left:16px;border-left:2px solid #d9e2d6}.book-toc-entry>summary:hover{background:#f5f8f2}.book-toc-entry[open]>summary{color:var(--green);font-weight:600}.book-toc-entry .toc-entry-content{padding:0 24px 17px}.book-toc-entry .toc-entry-content p{font-size:14px;color:var(--muted);margin:0}.book-toc-entry,.book-toc-group{scroll-margin-top:20px}.toc-toolbar{margin-top:14px}.toc-toolbar p{font-size:14px;color:var(--muted)}.toc-actions{display:flex;gap:8px;flex-wrap:wrap}.toc-actions button{padding:7px 12px;border:1px solid #c9d5c8;color:var(--green);background:white;border-radius:4px;font-size:14px}.toc-actions button:hover{background:var(--soft)}@media(max-width:760px){.book-toc-children{margin-left:8px}.book-toc summary{padding:13px 12px;font-size:15px;margin-left:16px}.book-toc-group>summary{margin-left:0;padding-left:16px}.book-toc-entry .toc-entry-content{padding:0 16px 16px}}

.footer{display:block}.footer h2{font-size:18px;color:var(--green);margin:0 0 16px}.recommended-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.recommended-site{display:flex;align-items:center;gap:14px;background:white;border:1px solid var(--line);border-radius:6px;padding:18px;min-width:0}.recommended-site:hover,.recommended-site:focus-visible{border-color:var(--green);background:#eef2eb}.recommended-site img{width:48px;height:48px;flex:none;object-fit:contain;border-radius:10px}.recommended-site strong{display:block;color:var(--green);font-size:16px;line-height:1.5}.recommended-site span span{display:block;font-size:14px;line-height:1.7;margin-top:4px}.admin-contact{font-size:14px;margin:18px 0 24px}.admin-contact strong{color:var(--green);user-select:all}.footer-meta{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px 20px;border-top:1px solid var(--line);padding-top:18px;font-size:13px}@media(max-width:760px){.recommended-grid{grid-template-columns:1fr}.recommended-site{padding:16px}.footer-meta{flex-direction:column}}

img.brand-mark{width:48px;height:48px;background:transparent;object-fit:contain;border-radius:10px}

#author{scroll-margin-top:24px}.author-summary{border-left:3px solid var(--green);padding:12px 18px;background:var(--soft);font-weight:600}#author .hint a{text-decoration:underline;text-underline-offset:3px}

.summary-status{display:inline-block;margin-left:10px;font-size:12px;color:var(--green);font-weight:500;background:var(--soft);padding:1px 7px;border-radius:3px}.chapter-summary p{font-size:16px;line-height:1.95;color:var(--ink);font-weight:400;overflow-wrap:anywhere}.chapter-summary h3{font-size:17px;color:var(--green);margin:28px 0 12px}.chapter-summary .summary-source{font-size:13px;color:var(--muted);line-height:1.7;border-bottom:1px solid var(--line);padding-bottom:16px}.chapter-summary{padding:16px 24px 28px}.book-toc-entry summary{scroll-margin-top:16px}@media(max-width:760px){.chapter-summary{padding:12px 14px 24px}}

/* Home identity remains visible independently of the navigation drawer. */
.home-identity{display:flex;align-items:center;gap:24px;margin:4px 0 26px}.home-logo{display:block;width:96px;height:96px;flex:0 0 auto;border-radius:22px}.home-identity .eyebrow{margin:0 0 10px}.home-name{font-size:clamp(30px,3.2vw,46px);line-height:1.25;letter-spacing:-1.4px;font-weight:750;color:var(--green);margin:0}.home-name span{white-space:nowrap}.home-tagline{font-size:22px;line-height:1.6;letter-spacing:-.5px;margin:0 0 8px;font-weight:600}.home-intro .lead{margin-top:0}@media(max-width:760px){.home-identity{gap:16px;margin:4px 0 22px}.home-logo{width:72px;height:72px;border-radius:17px}.home-identity .eyebrow{font-size:10px;letter-spacing:1px;margin-bottom:7px}.home-name{font-size:32px;letter-spacing:-1px}.home-name span{display:block}.home-tagline{font-size:18px}}@media(max-width:360px){.home-identity{gap:12px}.home-logo{width:60px;height:60px}.home-name{font-size:28px}.home-identity .eyebrow{font-size:9px;letter-spacing:.5px}}

.home-intro .lead{max-width:none}

.book-row .book-english,.book-english{font-size:14px;line-height:1.55;color:var(--green);margin:5px 0}.book-row .book-publication,.book-publication{font-size:12px;line-height:1.6;color:var(--muted);margin:5px 0 9px}

.chronology-label{font-size:12px;font-weight:400;color:var(--muted);white-space:nowrap}