:root{color-scheme:light;--ink:#17333d;--muted:#52686f;--line:#dbe3e4;--paper:#f7f9f8;--surface:#fff;--mint:#b3efd3;--green:#226149;--soft:#e9f4ee;--subtle:#f0f2f1;--input-border:#bccbcc;--card-hover:#94b5a5;--featured-muted:#c0d2d6;--code-bg:#19323b;--code-text:#d4f3e2;--code-muted:#c0d3d3}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,"Noto Sans",sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input{font:inherit}button,a,input,summary{outline-offset:5px}button{cursor:pointer}a:hover{color:var(--green)}.shell{max-width:1184px;padding:0 32px;margin:0 auto}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.header{background:var(--surface);border-bottom:1px solid var(--line)}.header-inner{height:88px;display:flex;align-items:center;gap:50px}.brand{display:flex;align-items:center;gap:12px;font-size:17px;font-weight:800;letter-spacing:1px;line-height:1.05}.brand-atlas{display:block;font-weight:400;letter-spacing:3.1px;font-size:15px;margin-top:4px}.brand-symbol{display:flex;align-items:center;background:var(--ink);color:white;padding:10px 8px;letter-spacing:-4px;font-size:25px;width:42px;height:42px;overflow:hidden}.brand-symbol span{color:var(--mint);transform:translateY(4px)}.nav{display:flex;gap:28px;font-size:14px}.language{margin-left:auto;position:relative;font-size:13px}.language summary{display:flex;align-items:center;gap:9px;cursor:pointer;list-style:none;padding:12px 0}.language summary::-webkit-details-marker{display:none}.language-menu{position:absolute;right:0;top:42px;width:180px;padding:8px;background:var(--surface);border:1px solid var(--line);box-shadow:0 10px 24px #17333d14;border-radius:8px;z-index:5}.language-menu a{display:flex;justify-content:space-between;padding:10px;border-radius:4px}.language-menu a:hover{background:var(--paper)}
.intro{padding:66px 0 44px;max-width:850px}.eyebrow,.section-label{font-size:11px;text-transform:uppercase;letter-spacing:1.8px;font-weight:700;color:var(--muted)}.intro h1{font-family:Georgia,"Noto Serif",serif;font-weight:400;font-size:clamp(34px,4.2vw,54px);line-height:1.16;letter-spacing:-1.4px;margin:19px 0 18px}.intro>p{max-width:710px;color:var(--muted);line-height:1.65;font-size:17px;margin:0 0 27px}.search-form{display:flex;align-items:center;gap:14px;background:var(--surface);border:1px solid var(--input-border);border-radius:5px;padding:7px 7px 7px 18px;max-width:740px}.search-form>svg{color:var(--muted);flex-shrink:0}.search-form input{border:0;background:none;width:100%;min-width:0;height:42px;font-size:15px;color:var(--ink);outline:0}.search-form:focus-within{outline:2px solid var(--green);outline-offset:2px}.search-form input::placeholder{color:var(--muted)}.search-form button{background:var(--ink);color:white;padding:13px 24px;border:0;border-radius:3px;font-size:14px}.search-form button:hover{background:var(--green)}.quick-links{display:flex;align-items:center;gap:9px;margin-top:14px;font-size:11px;color:var(--muted);flex-wrap:wrap}.quick-links a{border:1px solid var(--line);padding:5px 10px;border-radius:3px}.quick-links a:hover{background:var(--surface)}.quick-links>span{margin-left:8px}
.spotlight{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:stretch;margin:12px 0 56px}.spotlight .section-label{margin-bottom:15px}.spotlight>div{display:flex;flex-direction:column}.article-card{padding:27px 25px 22px;background:var(--surface);border:1px solid var(--line);border-radius:5px;display:flex;flex-direction:column;position:relative;transition:border-color .15s}.article-card:hover{border-color:var(--card-hover)}.card-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:11px;color:var(--muted)}.category{display:flex;align-items:center;gap:7px}.article-card h3{font-size:20px;line-height:1.35;font-weight:600;margin:22px 0 11px;letter-spacing:-.4px}.article-card h3 a::after{content:"";position:absolute;inset:0}.article-card>p{font-size:14px;color:var(--muted);line-height:1.7;margin:0 0 26px}.card-bottom{margin-top:auto;display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--line);padding-top:16px;gap:14px;color:var(--muted)}.tag-line{font:11px monospace;line-height:1.5}.featured-card{background:var(--ink);border:0;color:white;flex:1;padding:31px 32px}.featured-card .card-meta,.featured-card .card-bottom{color:var(--mint)}.featured-card h3{font-family:Georgia,"Noto Serif",serif;font-size:32px;font-weight:400;line-height:1.24;margin:36px 0 18px}.featured-card h3 a:hover{color:var(--mint)}.featured-card>p{color:var(--featured-muted);font-size:15px;max-width:430px}.featured-card .card-bottom{border-color:#ffffff29;padding-top:24px;margin-top:28px}.topic-list{border-top:1px solid var(--line)}.topic-row{display:flex;align-items:center;gap:17px;padding:15px 0;border-bottom:1px solid var(--line)}.topic-number{color:var(--muted);font:11px monospace}.topic-row>span:not(.topic-number):not(.topic-count){flex:1}.topic-row strong{display:block;font-size:14px;font-weight:600}.topic-row small{display:block;margin-top:4px;font-size:12px;color:var(--muted);line-height:1.3}.topic-count{color:var(--muted);font:12px monospace}.topic-row:hover{background:var(--soft)}.section-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:22px;gap:20px}.section-head h2{font:400 27px Georgia,"Noto Serif",serif;margin:0}.section-head>span,.reset{font-size:12px;color:var(--muted)}.topic-pills{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:22px}.topic-pills a{padding:8px 13px;font-size:11px;border:1px solid var(--line);border-radius:30px}.topic-pills a.active{background:var(--ink);color:white;border-color:var(--ink)}.article-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.library{padding-bottom:70px}.empty{text-align:center;padding:55px;border:1px dashed var(--line)}.empty p{color:var(--muted)}.empty a{font-size:14px;text-decoration:underline}.footer{border-top:1px solid var(--line);padding-top:26px;padding-bottom:30px;display:flex;align-items:center;gap:30px;font-size:11px;color:var(--muted)}.footer-brand{letter-spacing:1.5px;font-weight:700;color:var(--ink)}.footer>div{display:flex;gap:24px}.footer>span{margin-left:auto}.unavailable{min-height:55vh;padding-top:80px}
.article-shell{padding-top:30px}.breadcrumbs{display:flex;gap:10px;font-size:12px;color:var(--muted);margin-bottom:34px}.article-layout{display:grid;grid-template-columns:minmax(0,770px) 1fr;gap:70px}.prose h1{font:400 clamp(32px,3.5vw,44px)/1.2 Georgia,"Noto Serif",serif;letter-spacing:-.7px;margin:18px 0 20px}.prose .dek{font-size:18px;color:var(--muted);line-height:1.65;margin-bottom:23px}.article-meta{display:flex;gap:24px;flex-wrap:wrap;font-size:12px;color:var(--muted);margin-bottom:32px}.article-meta>span{display:flex;align-items:center;gap:7px}.prose h2{font-size:24px;line-height:1.35;letter-spacing:-.4px;margin:36px 0 17px}.prose p{font-size:17px;line-height:1.8;margin:0 0 18px}.short-answer{background:var(--soft);border-left:3px solid var(--green);padding:24px 27px;margin-bottom:32px}.short-answer p{margin:13px 0 0;font-size:17px;line-height:1.75}.code-block{position:relative;background:var(--code-bg);border-radius:5px;margin:22px 0;color:var(--code-text);overflow:hidden}.code-block pre{font:13px/1.8 ui-monospace,SFMono-Regular,Consolas,monospace;padding:25px;margin:0;overflow-x:auto;tab-size:2;padding-right:50px}.code-block button{position:absolute;top:10px;right:10px;color:var(--code-muted);background:#ffffff0b;border:1px solid #ffffff24;border-radius:4px;padding:6px;display:flex}.checklist ul{list-style:none;margin:0;padding:0}.checklist li{display:flex;gap:12px;align-items:flex-start;font-size:16px;line-height:1.65;padding:9px 0}.checklist svg{flex-shrink:0;margin-top:4px;color:var(--green)}.limitation{margin-top:32px;background:var(--subtle);border:1px solid var(--line);border-radius:5px;padding:22px 25px}.limitation strong{font-size:13px}.limitation p{font-size:15px;color:var(--muted);line-height:1.75;margin:10px 0 0}.sources{border-top:1px solid var(--line);margin-top:40px}.sources ol{padding-left:22px}.sources li{padding:8px 0;font-size:13px;line-height:1.5;color:var(--muted)}.sources a{display:inline-flex;gap:9px;align-items:center;text-decoration:underline;text-decoration-color:var(--input-border);text-underline-offset:4px}.sources svg{flex-shrink:0}.toc{position:sticky;top:35px;padding-top:12px}.toc>.section-label{display:block;margin-bottom:22px}.toc>a{display:block;border-left:1px solid var(--line);padding:8px 0 8px 16px;font-size:12px;line-height:1.55;color:var(--muted)}.toc>a:hover{border-color:var(--green);color:var(--green)}.aside-tags{display:flex;gap:7px;flex-wrap:wrap;margin-top:28px}.aside-tags>a{font:11px monospace;padding:6px 9px;border:1px solid var(--line);border-radius:3px}.feedback{border-top:1px solid var(--line);padding-top:28px;margin-top:32px;display:flex;gap:15px;align-items:center;flex-wrap:wrap}.feedback strong{font-size:14px;margin-right:auto}.feedback>div{display:flex;gap:8px}.feedback button{display:flex;gap:8px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:4px;padding:9px 15px;font-size:12px;color:var(--ink)}.feedback button[aria-pressed=true]{background:var(--soft);border-color:var(--green)}.feedback button:disabled{opacity:.6}.feedback>p{width:100%;font-size:12px;color:var(--muted);margin:0}.related{margin:60px 0}.policy{max-width:820px;padding-top:55px;padding-bottom:70px;min-height:65vh}.policy .prose h2{font-size:22px}.policy .prose p{font-size:16px}.policy a{text-decoration:underline}.policy .eyebrow a{text-decoration:none}
.studio{padding-top:35px;padding-bottom:65px}.studio-heading{display:flex;gap:20px;align-items:start;justify-content:space-between;margin-bottom:25px}.studio h1{font:400 34px Georgia,serif;margin:10px 0}.studio .notice{background:var(--soft);border:1px solid var(--input-border);padding:22px;line-height:1.6;border-radius:5px;font-size:14px;margin:30px 0}.studio .periods{display:flex;gap:7px;margin-top:15px}.periods a{padding:7px 12px;border:1px solid var(--line);border-radius:4px;font-size:12px}.periods a.active{background:var(--ink);color:white}.metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:15px}.metric{padding:24px;background:var(--surface);border:1px solid var(--line);border-radius:5px}.metric strong{display:block;font-size:34px;font-weight:500;margin:14px 0}.metric small,.metric>span{font-size:12px;color:var(--muted);line-height:1.5}.studio h2{font-size:21px;margin:35px 0 15px}.table-scroll{overflow:auto;background:var(--surface);border:1px solid var(--line);border-radius:5px}.studio table{border-collapse:collapse;width:100%;font-size:12px;text-align:left}.studio td,.studio th{padding:14px 18px;border-bottom:1px solid var(--line);vertical-align:top;white-space:nowrap}.studio td:first-child{white-space:normal;min-width:240px}.studio th{background:var(--soft);color:var(--muted);font-weight:500}.studio td a{text-decoration:underline;text-underline-offset:3px}.studio .method{font-size:12px;color:var(--muted);line-height:1.7;max-width:850px}.studio-columns{display:grid;grid-template-columns:1fr 1fr;gap:25px}.studio-columns p{font-size:14px;line-height:1.7;color:var(--muted)}
@media(min-width:1450px){.shell{max-width:1260px}.intro{padding-top:75px}.spotlight{gap:44px}.article-layout{gap:95px}}
@media(max-width:900px){.shell{padding-left:24px;padding-right:24px}.header-inner{height:78px;gap:35px}.intro{padding-top:45px}.article-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.featured-card h3{font-size:28px}.spotlight{gap:22px}.topic-row{gap:12px;padding:14px 0}.topic-row small{font-size:11px}.article-layout{grid-template-columns:minmax(0,1fr)}.article-aside{display:none}.metrics{grid-template-columns:repeat(2,minmax(0,1fr))}.prose{max-width:760px}.footer{flex-wrap:wrap;gap:20px}.footer>span{margin-left:0}}
@media(max-width:600px){.shell{padding-left:20px;padding-right:20px}.header-inner{height:72px;gap:20px}.brand{font-size:14px;gap:9px}.brand-atlas{font-size:12px;letter-spacing:2.6px}.brand-symbol{width:34px;height:34px;font-size:21px;padding:8px 6px}.nav{display:none}.language{font-size:11px}.language summary{gap:6px}.intro{padding:36px 0 28px}.intro h1{font-size:36px;letter-spacing:-.7px}.intro>p{font-size:15px;line-height:1.65}.eyebrow,.section-label{font-size:10px;letter-spacing:1.4px}.search-form{gap:8px;padding-left:11px}.search-form input{font-size:12px;height:37px}.search-form button{font-size:12px;padding:12px 14px}.quick-links{gap:7px}.quick-links>span{display:block;width:100%;margin-left:0;margin-top:7px}.spotlight{grid-template-columns:1fr;margin:15px 0 36px;gap:28px}.featured-card{padding:27px}.featured-card h3{margin-top:27px;font-size:29px}.topic-row small{font-size:12px}.article-grid{grid-template-columns:1fr;gap:14px}.article-card{padding:23px}.article-card h3{font-size:21px}.article-card>p{margin-bottom:22px}.section-head h2{font-size:25px}.topic-pills{gap:7px}.topic-pills a{font-size:10px;padding:8px 11px}.library{padding-bottom:42px}.footer{font-size:10px;padding-top:24px;padding-bottom:26px;gap:16px}.footer>div{gap:15px;width:100%;order:3}.footer>span{margin-left:auto}.breadcrumbs{margin-bottom:28px;font-size:11px}.article-shell{padding-top:23px}.prose h1{font-size:34px}.prose .dek{font-size:16px}.prose p{font-size:16px;line-height:1.8}.prose h2{font-size:22px}.short-answer{padding:21px}.short-answer p{font-size:16px}.article-meta{font-size:11px;gap:14px}.code-block pre{font-size:12px;padding:22px 18px;padding-right:45px}.checklist li{font-size:15px}.feedback strong{width:100%}.related{margin:44px 0}.policy{padding-top:36px}.studio-heading{display:block}.metrics{gap:10px}.metric{padding:17px}.metric strong{font-size:27px}.studio-columns{grid-template-columns:1fr;gap:5px}}
.pagination{display:flex;gap:15px;align-items:center;justify-content:center;margin:30px 0}.studio select,.studio textarea{display:block;width:100%;border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:4px;padding:12px;margin:8px 0 18px;font:14px/1.6 Arial,sans-serif}.studio form>label{font-size:12px;color:var(--muted)}.studio form>button{border:0;background:var(--ink);color:white;border-radius:4px;padding:12px 20px}.studio form>button:disabled{opacity:.6}.studio #assistant-result{white-space:pre-wrap;font:14px/1.7 Arial,sans-serif;max-width:100%;overflow-wrap:anywhere;margin:20px 0}.checklist li>span:first-child{color:var(--green)}

.article-card .category{position:relative;z-index:1}.pagination{flex-wrap:wrap}.skip-link:focus{position:fixed;top:12px;left:12px;width:auto;height:auto;clip:auto;padding:12px;z-index:10;background:var(--surface)}
.language-card{position:relative;padding:27px 25px;background:var(--surface);border:1px solid var(--line);border-radius:5px;display:flex;flex-direction:column}.language-card h3{margin:0 0 16px;font-size:22px}.language-card h3 a::after{content:"";position:absolute;inset:0}.language-card:hover{border-color:var(--green)}.language-card p{color:var(--muted);font-size:14px;line-height:1.7;margin:0 0 20px}.language-card small{margin-top:auto;color:var(--muted)}.pagination-current{padding:7px 12px;border:1px solid var(--ink);border-radius:4px;background:var(--ink);color:white;font-size:12px}.pagination-gap{color:var(--muted)}

/* Palettes share the same semantic colors across catalogs, articles and studio. */
html[data-theme="ocean"]{--ink:#17324f;--muted:#52667f;--line:#d6e1ee;--paper:#f5f8fc;--mint:#b9dcff;--green:#235e96;--soft:#e8f1fb;--subtle:#edf1f6;--input-border:#9cb4cf;--card-hover:#7ba3cb;--featured-muted:#c5d6ea;--code-bg:#173049;--code-text:#daecff;--code-muted:#c4d8ef}
html[data-theme="lavender"]{--ink:#332745;--muted:#6b597c;--line:#e2d9ed;--paper:#faf7fd;--mint:#e1ccff;--green:#6b4092;--soft:#f0e8fa;--subtle:#f1edf5;--input-border:#b9a6cc;--card-hover:#a58abc;--featured-muted:#cfc2df;--code-bg:#30263e;--code-text:#eadcff;--code-muted:#d3c5e2}
html[data-theme="sand"]{--ink:#403127;--muted:#736052;--line:#e6ddd1;--paper:#fcf9f3;--mint:#f5dba6;--green:#835321;--soft:#f6eddd;--subtle:#f1ebe2;--input-border:#c7b394;--card-hover:#b99868;--featured-muted:#decfbb;--code-bg:#382c24;--code-text:#f8e5c8;--code-muted:#dfcbb3}
html[data-theme="graphite"]{--ink:#29313b;--muted:#5c6775;--line:#dde1e7;--paper:#f7f8fa;--mint:#d6e0ee;--green:#405572;--soft:#eaf0f7;--subtle:#eef0f3;--input-border:#acb6c4;--card-hover:#8d9dad;--featured-muted:#cbd3df;--code-bg:#252e38;--code-text:#e0e8f4;--code-muted:#cad5e3}

.header-actions{display:flex;align-items:center;gap:20px;margin-left:auto;flex-shrink:0}
.header-actions .language{margin-left:0}
.theme-picker{position:relative;font-size:13px}
.theme-picker[hidden]{display:block;visibility:hidden}
.theme-picker summary{display:flex;align-items:center;gap:8px;min-height:44px;padding:12px 0;cursor:pointer;list-style:none}
.theme-picker summary::-webkit-details-marker{display:none}
.theme-menu{position:absolute;right:0;top:calc(100% + 4px);width:190px;padding:8px;background:var(--surface);border:1px solid var(--line);border-radius:8px;box-shadow:0 10px 24px #17333d14;z-index:6}
.theme-menu button{display:flex;align-items:center;gap:12px;width:100%;min-height:44px;padding:10px;border:0;border-radius:4px;text-align:left;background:transparent;color:var(--ink);font-size:14px}
.theme-menu button:hover,.theme-menu button[aria-pressed="true"]{background:var(--soft)}
.theme-check{margin-left:auto;visibility:hidden;color:var(--green)}
.theme-menu button[aria-pressed="true"] .theme-check{visibility:visible}
.theme-swatch{display:inline-block;width:16px;height:16px;border-radius:50%;background:var(--green);box-shadow:inset 0 0 0 1px #0002;flex-shrink:0}
.theme-swatch-mint{background:#226149}.theme-swatch-ocean{background:#235e96}.theme-swatch-lavender{background:#6b4092}.theme-swatch-sand{background:#835321}.theme-swatch-graphite{background:#405572}
.featured-card .category:hover{color:white}
@media(max-width:760px){.header-inner{gap:18px}.nav{display:none}.header-actions{gap:14px}}
@media(max-width:600px){.header-inner{gap:12px}.header-actions{gap:10px}.theme-picker{font-size:11px}.theme-picker summary{gap:6px}.theme-swatch{width:14px;height:14px}.theme-menu{width:180px}.footer>div{flex-wrap:wrap}}
@media(max-width:380px){.header-inner{height:auto;min-height:72px;flex-wrap:wrap;row-gap:0;padding-top:10px;padding-bottom:10px}.header-actions{margin-left:auto}}
html[lang="hi"] body{font-family:"Nirmala UI","Noto Sans Devanagari",Arial,sans-serif}
html[lang="hi"] :is(.intro h1,.prose h1,.section-head h2,.featured-card h3){font-family:"Nirmala UI","Noto Sans Devanagari",Arial,sans-serif;letter-spacing:normal;line-height:1.45}
html[lang="hi"] :is(.article-card h3,.prose h2){letter-spacing:normal}

/* Reader controls and a catalog that stays usable on narrow screens. */
.header-inner{gap:32px}.header-inner .nav{display:flex;align-items:center;gap:20px}.nav a{line-height:1.5}.nav a[aria-current="page"]{color:var(--green);text-decoration:underline;text-underline-offset:6px;text-decoration-thickness:2px}
.saved-count{display:inline-flex;align-items:center;justify-content:center;min-width:20px;height:20px;padding:0 5px;background:var(--soft);color:var(--green);border-radius:20px;font-size:10px;font-weight:700}
.intro .search-help{font-size:12px;line-height:1.6;margin:12px 0 0;max-width:740px}
.section-head{flex-wrap:wrap;row-gap:10px}.catalog-count{margin-left:auto}
.button-link{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:44px;padding:12px 20px;border:1px solid var(--ink);border-radius:5px;background:var(--ink);color:white;font-size:14px;line-height:1.5}.button-link:hover{background:var(--green);border-color:var(--green);color:white}
.article-card{min-width:0}.card-date{display:block;font-size:11px;line-height:1.5;color:var(--muted);margin:0 0 18px}.featured-card .card-date{color:var(--featured-muted)}
.card-bottom{min-width:0;flex-wrap:wrap}.tag-line{min-width:0;overflow-wrap:anywhere}
.bookmark-button{display:inline-flex;align-items:center;justify-content:center;gap:7px;position:relative;z-index:2;min-height:38px;padding:8px 10px;max-width:100%;border:1px solid var(--line);border-radius:5px;background:var(--surface);color:var(--ink);font-size:12px;line-height:1.5;flex-shrink:0}
.bookmark-button:hover,.bookmark-button[aria-pressed="true"]{background:var(--soft);border-color:var(--green);color:var(--green)}
.featured-card .bookmark-button{background:transparent;border-color:#ffffff60;color:white}.featured-card .bookmark-button:hover,.featured-card .bookmark-button[aria-pressed="true"]{background:#ffffff14;border-color:var(--mint);color:var(--mint)}
.bookmark-button[hidden],.reading-size[hidden],.reading-progress[hidden],.saved-count[hidden]{display:none}
.reader-toolbar{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin:0 0 26px;padding:16px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.reading-size{display:flex;gap:7px;align-items:center;flex-wrap:wrap}.reading-size>span{font-size:11px;color:var(--muted);margin-right:4px}.reading-size button{min-height:38px;padding:8px 10px;border:1px solid var(--line);border-radius:5px;background:var(--surface);color:var(--ink);font-size:12px}.reading-size button[aria-pressed="true"]{border-color:var(--green);background:var(--soft);color:var(--green)}
html[data-reading-size="large"] .prose p,html[data-reading-size="large"] .checklist li{font-size:20px;line-height:1.9}html[data-reading-size="large"] .code-block pre{font-size:14px}html[data-reading-size="large"] .prose .limitation p{font-size:18px}
.prose h2.section-label{font-size:11px;line-height:1.5;letter-spacing:1.5px;margin:0;font-weight:700}.short-answer h2.section-label{color:var(--green)}
.reading-progress{position:fixed;top:0;left:0;right:0;height:3px;background:var(--line);z-index:30;pointer-events:none}.reading-progress span{display:block;width:100%;height:100%;background:var(--green);transform:scaleX(0);transform-origin:left center}
.toc>a[aria-current="location"]{border-left:2px solid var(--green);padding-left:15px;color:var(--green);background:var(--soft);font-weight:700}
.mobile-toc{display:none;border:1px solid var(--line);border-radius:6px;background:var(--surface);margin-bottom:24px}.mobile-toc summary{padding:15px 18px;min-height:48px;cursor:pointer;font-size:14px;font-weight:600}.mobile-toc nav{padding:0 18px 10px}.mobile-toc a{display:block;padding:10px 0;color:var(--muted);font-size:13px;line-height:1.6}
.back-top{display:inline-flex;gap:8px;align-items:center;padding:12px 0;margin-top:24px;color:var(--muted);font-size:13px}
.reader-status{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);width:max-content;max-width:min(650px,calc(100% - 32px));padding:14px 20px;border-radius:6px;background:var(--ink);color:white;font-size:13px;line-height:1.6;box-shadow:0 8px 30px #0002;z-index:40}.reader-status:empty{display:none}
.saved-page{min-height:65vh}.intro .saved-notice{font-size:13px;line-height:1.6;color:var(--muted)}.saved-card .card-bottom{justify-content:flex-end}.saved-card .bookmark-button{white-space:normal;flex-shrink:1;text-align:left}
.error-page{min-height:65vh;padding-top:70px;padding-bottom:80px;max-width:820px}.error-code{font:700 13px monospace;color:var(--green);letter-spacing:3px}.error-page h1{font:400 clamp(30px,4vw,48px)/1.25 Georgia,serif;margin:20px 0}.error-page>p{font-size:17px;line-height:1.8;color:var(--muted)}.error-page .search-form{margin-top:30px}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--green)}.featured-card a:focus-visible,.featured-card button:focus-visible{outline-color:var(--mint)}
.footer>div{flex-wrap:wrap;row-gap:12px}.breadcrumbs{flex-wrap:wrap;line-height:1.7}.prose{min-width:0;overflow-wrap:anywhere}.code-block pre{overflow-wrap:normal}
@media(max-width:1050px){.header-inner{gap:24px}.header-inner .nav{gap:14px;font-size:12px}.header-actions{gap:14px}}
@media(max-width:900px){.header-inner .nav-topics{display:none}.mobile-toc{display:block}}
@media(max-width:760px){.header-inner{height:auto;min-height:78px;flex-wrap:wrap;gap:10px 16px;padding-top:14px;padding-bottom:0}.header-inner .nav{order:3;width:100%;justify-content:space-between;border-top:1px solid var(--line);padding:10px 0;margin-top:4px;font-size:12px}.header-actions{margin-left:auto}.header-inner .nav-topics{display:block}.language-menu{top:calc(100% + 4px)}}
@media(max-width:600px){.header-inner{gap:6px 10px;padding-top:12px}.header-actions{gap:10px}.header-inner .nav{gap:12px;font-size:11px;line-height:1.5}.header-inner .nav-topics{display:none}.article-meta{gap:10px 16px}.reader-toolbar{gap:12px}.reading-size{width:100%}.reading-size>span{margin-right:auto}.card-bottom{gap:10px}.bookmark-button{padding:8px;font-size:11px}.prose h2.section-label{font-size:10px}.error-page{padding-top:45px;padding-bottom:50px}.error-page>p{font-size:15px}.reader-status{bottom:12px;font-size:12px;padding:12px 16px}.catalog-count{font-size:11px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.article-card{transition:none}}
.prose p,.prose li{text-align:justify;text-align-last:start;text-justify:inter-word;hyphens:auto}
html[lang^="zh"] .prose p,html[lang^="zh"] .prose li{text-justify:inter-character}