/* Manual adaptations; base geometry, colors and component rules come from the MIT reference. */
:root{--font:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif}
body{overflow-wrap:anywhere}.nav-in{min-width:0}.search{min-width:70px}.search input{min-width:0}.home-link{font-size:13px;white-space:nowrap;color:var(--t2);padding:6px 8px}.skip{position:fixed;top:-100px;left:16px;z-index:100;background:var(--bg);padding:10px}.skip:focus{top:8px}
.doc-head p{line-height:1.8}.doc-head .sub{margin:0 0 14px}.reading-links{display:flex;gap:16px;flex-wrap:wrap;font-size:13px;margin-top:12px}.stat{font-variant-numeric:tabular-nums}.card{content-visibility:visible}.card .lab{color:var(--t3);font-size:13px;font-weight:500;margin-right:16px;display:inline-block;min-width:52px}.card p{margin:0 0 10px;line-height:1.8}.card p:last-child{margin-bottom:0}.card .desc{color:var(--t2);line-height:1.8}.card .tags{margin-top:10px;display:flex;gap:6px;flex-wrap:wrap}.card .tags span{font-size:12px;color:var(--t2);border-radius:10px;background:var(--gray-soft);padding:0 8px}.card-link{display:inline-block;margin-top:14px;font-size:13px}.card .anchor{opacity:1}.match-preview{border-top:1px solid var(--divider);margin-top:12px;padding-top:10px;color:var(--t2);font-size:13px}.section-note{font-size:13px;line-height:1.8;margin:10px 0 18px;color:var(--t2)}.section-note summary{cursor:pointer;color:var(--t2)}.section-note .meta{margin-top:8px}.section-note .htx-hero h1{font-size:17px;line-height:1.5;margin:10px 0}.lic,.pd{display:inline-block;font-size:12px;color:var(--green-1);background:var(--green-soft);padding:2px 8px;border-radius:6px;margin:8px 0}.man-note,.htx-note,.warnbox{line-height:1.85;font-size:14px;border:1px solid var(--divider);background:var(--bg-soft);border-radius:10px;padding:16px 18px;margin-top:20px}.warnbox{color:var(--yellow-1);background:var(--yellow-soft);border-color:transparent}.section-note .htx-note{font-size:13px}.reader-footer{margin-top:48px;padding-top:22px;border-top:1px solid var(--divider);color:var(--t3);font-size:12px;line-height:1.8}.reader-footer p{margin:6px 0}.reader-footer a{margin-right:8px}#empty,#link-notice{border:1px solid var(--divider);border-radius:10px;padding:24px;margin:20px 0;color:var(--t2)}#link-notice{padding:12px 16px}.sidebar-close{display:none}.card:target{outline:2px solid var(--brand-soft);outline-offset:2px}.book-content h1{font-size:32px;line-height:1.4;letter-spacing:-.02em;margin:0 0 12px}.book-content .meta{color:var(--t2);font-size:14px;line-height:1.8}.book-content h2{font-size:24px;line-height:1.4;font-weight:600;letter-spacing:-.02em;margin:36px 0 16px;padding-top:24px;border-top:1px solid var(--divider)}.book-content p,.book-content li{font-size:15px;line-height:1.9;color:var(--t1)}.book-content li{margin-bottom:8px}.book-content table{border-collapse:collapse;width:100%;font-size:14px;line-height:1.8}.book-content td,.book-content th{padding:12px;border:1px solid var(--divider);text-align:left;vertical-align:top}.book-content th{background:var(--bg-soft)}html.dark .book-content td[style]{color:var(--yellow-1)!important}.table-scroll{overflow-x:auto;max-width:100%}.book-content .src{font-size:13px;line-height:1.8}.book-nav{display:flex;gap:16px;flex-wrap:wrap;margin:0 0 24px;font-size:13px}.legal-heading{font-size:20px;margin-top:40px}.search-submit{display:none}.book-mode .search kbd{display:none}.book-mode .search input{padding-right:56px}.book-mode .search-submit{display:block;position:absolute;right:8px;top:8px;font-size:12px;color:var(--brand-1);padding:3px 4px}.card-h h3{font-size:18px}.grade-hint{font-size:12px;color:var(--t3)}.chip{min-height:28px}.fold-row{display:flex;align-items:flex-start}.fold-row .sec-link{flex:1;min-width:0}.fold-button{flex:none;width:26px;height:32px;color:var(--t3)}.fold-button svg{width:16px;height:16px;fill:currentColor;transform:rotate(0)}.fold-button[aria-expanded=false] svg{transform:rotate(-90deg)}
@media(max-width:960px){.title{display:none}.nav-in{gap:8px;padding:0 12px}.home-link{padding:6px 2px;font-size:12px}.nav-r{gap:4px}.switch{margin-left:2px}.sidebar-close{display:block;width:100%;padding:8px 0 12px;text-align:left;color:var(--brand-1);font-size:13px}.book-content h1{font-size:26px}.book-content h2{font-size:21px}.card{padding:18px 16px 14px}.card-h h3{font-size:16px}.content{padding-left:20px;padding-right:20px}.sidebar:not(.open){visibility:hidden}.sidebar.open{visibility:visible}.man-note,.htx-note,.warnbox{padding:14px}.search kbd{display:none}}
@media(max-width:360px){.nav-in{gap:4px;padding:0 8px}.icon-btn{width:30px}.switch{width:40px}.home-link{font-size:12px}.content{padding-left:16px;padding-right:16px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}

.fold-button svg{fill:none;stroke:currentColor;stroke-width:2;transition:transform .15s}.fold-button[aria-expanded="true"] svg{transform:rotate(180deg)}

.book-content .lead{font-size:17px;line-height:1.85}.book-content .human{padding:16px;border-left:3px solid var(--brand-1);background:var(--brand-soft);line-height:1.9}.book-content a{text-decoration:underline;text-underline-offset:3px}.prompt-box{padding:18px;background:var(--bg-soft);border:1px solid var(--divider);border-radius:10px}.prompt-box button{background:var(--brand-1);color:#fff;padding:10px 16px;border-radius:6px;min-height:44px;font-size:14px}.prompt-box pre{white-space:pre-wrap;overflow-wrap:anywhere;font-family:inherit;line-height:1.9;font-size:14px;margin:14px 0 0}.prompt-box .copy-status{font-size:13px;color:var(--t2);margin:8px 0 0}.book-content h2{scroll-margin-top:90px}.book-content .meta{padding-bottom:16px;border-bottom:1px solid var(--divider)}

/* Integrated first edition: same reading system, task-oriented entry points. */
.start-routes{margin:24px 0 12px}.start-routes h2{font-size:19px;margin:0 0 14px}
.route-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.route{display:block;border:1px solid var(--line,#dfe3e8);border-radius:8px;padding:14px;text-decoration:none!important}
.route strong{display:block;margin-bottom:5px}.route span{display:block;color:var(--muted,#667085);font-size:13px;line-height:1.65}
.route:hover,.route:focus-visible{border-color:#2563eb;background:rgba(37,99,235,.05)}
.dark .route{border-color:#414958}.dark .route span{color:#bbc4d2}
@media(max-width:520px){.route-grid{grid-template-columns:1fr}.route{padding:12px}}