.theme-switch{display:flex;align-items:center;gap:7px;padding:8px 12px!important;border:1px solid var(--line)!important;border-radius:22px;background:rgba(255,255,255,.38)!important;font:600 12px var(--sans)!important;white-space:nowrap;transition:.2s}.theme-switch:hover{background:#fff!important}.theme-icon{font-size:17px;line-height:1}
html[data-theme="night"]{color-scheme:dark;--ink:#eef4e7;--muted:#a8b8ab;--paper:#071b14;--white:#10291f;--green:#d9ef87;--green2:#a8d66f;--lime:#dcf48a;--line:rgba(218,239,199,.15)}
html[data-theme="night"] body{background:radial-gradient(circle at 85% 8%,rgba(120,172,111,.16),transparent 28%),radial-gradient(circle at 8% 55%,rgba(43,102,74,.18),transparent 30%),#071b14;color:var(--ink)}
html[data-theme="night"] .site-header{background:rgba(7,27,20,.88);border-color:rgba(220,244,209,.12)}html[data-theme="night"] .brand-mark{background:var(--lime);color:#0b3023;box-shadow:0 0 35px rgba(217,239,135,.18)}html[data-theme="night"] .brand small,html[data-theme="night"] .hero p,html[data-theme="night"] .article-head p{color:var(--muted)}html[data-theme="night"] .search-open,html[data-theme="night"] .theme-switch{background:rgba(255,255,255,.05)!important;border-color:rgba(255,255,255,.16)!important;color:var(--ink)}html[data-theme="night"] .search-open:hover,html[data-theme="night"] .theme-switch:hover{background:rgba(255,255,255,.1)!important}
html[data-theme="night"] .hero-art{box-shadow:0 35px 90px rgba(0,0,0,.5);border:1px solid rgba(217,239,135,.18)}html[data-theme="night"] .hero h1 em,html[data-theme="night"] .section-title>span,html[data-theme="night"] .eyebrow{color:var(--lime)}html[data-theme="night"] .stats{background:linear-gradient(110deg,#b9dc74,#d9ef87);color:#0a2a1f}html[data-theme="night"] .stats b{color:#103b2b}html[data-theme="night"] .stats div:not(:last-child):after{background:rgba(7,27,20,.18)}
html[data-theme="night"] .home-outline-row:hover,html[data-theme="night"] .topic-card,html[data-theme="night"] .feature,html[data-theme="night"] .catalog-item,html[data-theme="night"] .problem-grid article,html[data-theme="night"] .level-card,html[data-theme="night"] .deck-result li{background:rgba(255,255,255,.045);border-color:rgba(217,239,135,.14)}html[data-theme="night"] .topic-card:hover,html[data-theme="night"] .feature:hover,html[data-theme="night"] .catalog-item:hover{background:rgba(217,239,135,.08);box-shadow:0 22px 60px rgba(0,0,0,.25)}html[data-theme="night"] .section.soft,html[data-theme="night"] .deck-model{background:linear-gradient(180deg,#0d281e,#0a2119)}
html[data-theme="night"] .outline-main:hover,html[data-theme="night"] .outline-chapter[open] .outline-main,html[data-theme="night"] .outline-subs{background:rgba(255,255,255,.045)}html[data-theme="night"] .outline-open,html[data-theme="night"] .button{background:var(--lime);color:#0a2d21!important;box-shadow:0 12px 35px rgba(0,0,0,.22)}html[data-theme="night"] .button:hover{background:#edffae}
html[data-theme="night"] .prose{color:#e5eee3}html[data-theme="night"] .prose .doc-list li{background:linear-gradient(90deg,rgba(143,190,119,.12),transparent 78%);border-color:rgba(217,239,135,.24)}html[data-theme="night"] .prose .note{background:rgba(134,181,112,.13)}html[data-theme="night"] .article-toc{background:linear-gradient(90deg,rgba(255,255,255,.04),transparent)}html[data-theme="night"] .toc-back a,html[data-theme="night"] .pager a{background:rgba(255,255,255,.045);border-color:rgba(217,239,135,.15)}html[data-theme="night"] .toc-top{background:linear-gradient(180deg,rgba(7,27,20,.8),#071b14)}
html[data-theme="night"] .table-wrap{background:#0c281e;border-color:rgba(217,239,135,.2);box-shadow:0 20px 55px rgba(0,0,0,.3)}html[data-theme="night"] .table-wrap th{background:linear-gradient(135deg,#86b15e,#b9dc74);color:#09261c}html[data-theme="night"] .table-wrap tr:nth-child(even) td{background:rgba(217,239,135,.045)}html[data-theme="night"] .table-wrap tr:hover td{background:rgba(217,239,135,.09)}
html[data-theme="night"] .search-modal{background:rgba(0,8,5,.82)}html[data-theme="night"] .search-box,html[data-theme="night"] .search-row,html[data-theme="night"] .search-summary{background:#0b241b}html[data-theme="night"] #search-input{background:#102e22;color:var(--ink)}html[data-theme="night"] .result:hover{background:rgba(217,239,135,.06)}
html[data-theme="night"] .deck-statement,html[data-theme="night"] .deck-flow{background:linear-gradient(125deg,#b5d96e,#dbef8a);color:#0a2c21}html[data-theme="night"] .deck-statement>span,html[data-theme="night"] .flow-copy .eyebrow{color:#174632}html[data-theme="night"] .flow-copy p{color:rgba(7,31,23,.72)}html[data-theme="night"] .tree-word{border-color:rgba(7,31,23,.15)}html[data-theme="night"] .tree-word span{-webkit-text-stroke:1px rgba(7,31,23,.5);border-color:rgba(7,31,23,.12)}html[data-theme="night"] .principles-grid{border-color:rgba(217,239,135,.15);background:rgba(217,239,135,.15)}html[data-theme="night"] .principles-grid article{background:#092118}html[data-theme="night"] .deck-science{background:#16372a}html[data-theme="night"] .deck-science p{color:var(--ink)}html[data-theme="night"] .deck-final{background:radial-gradient(circle at 50% 100%,rgba(217,239,135,.15),transparent 45%)}
@media(max-width:1100px){.theme-label{display:none}.theme-switch{padding:8px 10px!important}}@media(max-width:850px){.site-header nav a[href$="presentation.html"]{display:none}.theme-switch{display:flex!important}}

html[data-theme="sky"]{color-scheme:light;--ink:#143a43;--muted:#5d7980;--paper:#edf9fc;--white:#f8fdfe;--green:#145d4a;--green2:#238167;--lime:#b6e3b2;--line:rgba(35,104,110,.18);--soft:#dff2f4;--accent:#176d58}
html[data-theme="sky"] body{position:relative;background:radial-gradient(circle at 50% -10%,rgba(255,255,255,.95),transparent 34%),linear-gradient(180deg,#d9f2fb 0,#edf9fc 42%,#dff3f5 100%);color:var(--ink)}
html[data-theme="sky"] body::before{content:"";position:fixed;z-index:0;inset:70px 0 0;pointer-events:none;opacity:.34;background:radial-gradient(ellipse 18px 8px at 22px 55px,rgba(29,126,91,.55) 0 45%,transparent 50%),radial-gradient(ellipse 8px 18px at 58px 108px,rgba(51,148,104,.42) 0 45%,transparent 50%),radial-gradient(circle at -8px 75px,transparent 0 42px,rgba(28,112,81,.48) 43px 45px,transparent 46px) left top/88px 152px repeat-y,radial-gradient(ellipse 18px 8px at calc(100% - 22px) 55px,rgba(29,126,91,.55) 0 45%,transparent 50%),radial-gradient(ellipse 8px 18px at calc(100% - 58px) 108px,rgba(51,148,104,.42) 0 45%,transparent 50%),radial-gradient(circle at calc(100% + 8px) 75px,transparent 0 42px,rgba(28,112,81,.48) 43px 45px,transparent 46px) right top/88px 152px repeat-y}
html[data-theme="sky"] body>header,html[data-theme="sky"] body>main,html[data-theme="sky"] body>footer,html[data-theme="sky"] body>.search-modal{position:relative;z-index:1}
html[data-theme="sky"] .site-header{background:rgba(239,250,252,.86);border-color:rgba(31,112,103,.18);box-shadow:0 8px 30px rgba(37,105,116,.07)}html[data-theme="sky"] .brand-mark{background:linear-gradient(145deg,#17634e,#2b8a70);box-shadow:0 10px 28px rgba(25,103,82,.2)}html[data-theme="sky"] .theme-switch,html[data-theme="sky"] .search-open{background:rgba(255,255,255,.7)!important;border-color:rgba(34,112,106,.22)!important;color:var(--ink)}
html[data-theme="sky"] .hero,html[data-theme="sky"] .contents-hero,html[data-theme="sky"] .article-head,html[data-theme="sky"] .article-hero{background:radial-gradient(circle at 78% 20%,rgba(103,190,204,.18),transparent 30%)}html[data-theme="sky"] .section.soft,html[data-theme="sky"] .deck-model{background:linear-gradient(180deg,rgba(210,239,245,.86),rgba(233,248,249,.88))}
html[data-theme="sky"] .topic-card,html[data-theme="sky"] .feature,html[data-theme="sky"] .catalog-item,html[data-theme="sky"] .source-entry,html[data-theme="sky"] .featured-reading,html[data-theme="sky"] .problem-grid article,html[data-theme="sky"] .level-card,html[data-theme="sky"] .principles-grid article,html[data-theme="sky"] .deck-result li{background:rgba(250,254,255,.78);border-color:rgba(29,115,104,.18);box-shadow:0 14px 34px rgba(45,116,128,.07)}html[data-theme="sky"] .topic-card:hover,html[data-theme="sky"] .feature:hover,html[data-theme="sky"] .catalog-item:hover,html[data-theme="sky"] .source-entry:hover{background:#fff;box-shadow:0 18px 42px rgba(35,113,116,.13)}
html[data-theme="sky"] .outline-main:hover,html[data-theme="sky"] .outline-chapter[open] .outline-main,html[data-theme="sky"] .outline-subs,html[data-theme="sky"] .article-toc{background:rgba(220,243,246,.72)}html[data-theme="sky"] .prose .doc-list li{background:linear-gradient(90deg,rgba(183,226,218,.48),rgba(232,247,249,.3) 78%);border-color:rgba(27,117,91,.22)}html[data-theme="sky"] .prose .note,html[data-theme="sky"] .short-enumeration{background:rgba(213,239,240,.7)}
html[data-theme="sky"] .table-wrap{background:rgba(250,254,255,.9);border-color:rgba(29,115,104,.22);box-shadow:0 18px 48px rgba(38,110,120,.11)}html[data-theme="sky"] .table-wrap th{background:linear-gradient(135deg,#247966,#45a088);color:#fff}html[data-theme="sky"] .table-wrap tr:nth-child(even) td{background:rgba(208,238,242,.45)}
html[data-theme="sky"] .deck-statement,html[data-theme="sky"] .deck-flow{background:linear-gradient(125deg,#175f55,#247d6d);color:#f5ffff}html[data-theme="sky"] .deck-science{background:linear-gradient(120deg,#cbeaf0,#dcefdc)}html[data-theme="sky"] .stats{background:linear-gradient(110deg,#78c6cf,#b7e5d2);color:#123f42}html[data-theme="sky"] .search-modal{background:rgba(24,67,73,.55)}html[data-theme="sky"] .search-box,html[data-theme="sky"] .search-row,html[data-theme="sky"] .search-summary{background:#f4fcfd}html[data-theme="sky"] #search-input{background:#e5f5f8;color:var(--ink)}
@media(max-width:760px){html[data-theme="sky"] body::before{opacity:.18;background-size:64px 130px}}
@media(max-width:850px){
  html[data-theme="sky"] .mobile-nav-links{background:#f8fdfe!important;border-color:rgba(29,115,104,.24);box-shadow:0 20px 52px rgba(24,86,91,.2)}
  html[data-theme="sky"] .mobile-nav-links a{background:#fff;border-color:rgba(29,115,104,.12)!important}
  html[data-theme="sky"] .crumbs{width:auto;max-width:none;margin:14px 18px 0;padding:9px 12px;border:1px solid rgba(29,115,104,.18);border-radius:12px;background:#f8fdfe;box-shadow:0 8px 24px rgba(35,113,116,.07)}
  html[data-theme="sky"] .article{width:auto;max-width:none;margin:14px 18px 55px;padding:26px 22px 48px;border:1px solid rgba(29,115,104,.18);border-radius:20px;background:#f8fdfe;box-shadow:0 18px 48px rgba(35,113,116,.1)}
  html[data-theme="sky"] .article-head{margin:0 0 24px;padding:4px 0 24px;background:none;border-bottom:1px solid rgba(29,115,104,.16)}
  html[data-theme="sky"] .article-head::after{margin-top:22px}
  html[data-theme="sky"] .article-head h1{margin:10px 0 14px;font-size:clamp(42px,7.5vw,58px);line-height:1.02}
  html[data-theme="sky"] .article-head p{margin:0;font-size:17px;line-height:1.55}
  html[data-theme="sky"] .article-toc{max-height:390px;margin:0 0 28px;padding:16px 14px;border:1px solid rgba(29,115,104,.17);border-left:3px solid var(--accent);border-radius:0 14px 14px 0;background:#e8f7f9;overflow:auto}
  html[data-theme="sky"] .article-toc .toc-top{bottom:-16px;margin-bottom:-16px;background:linear-gradient(180deg,rgba(232,247,249,.9),#e8f7f9)}
  html[data-theme="sky"] .prose{background:#f8fdfe}
}
@media(max-width:520px){
  html[data-theme="sky"] .crumbs{margin-left:10px;margin-right:10px}
  html[data-theme="sky"] .article{margin:10px;padding:20px 14px 38px;border-radius:16px}
  html[data-theme="sky"] .article-head h1{font-size:clamp(36px,11vw,46px)}
  html[data-theme="sky"] .article-head p{font-size:15px}
  html[data-theme="sky"] .article-toc{max-height:340px;padding:13px 11px}
}
html[data-theme="sky"] .site-header{position:sticky!important;top:0;z-index:100!important}
html[data-theme="sky"] .site-header .mobile-nav-links{z-index:120;background:#f8fdfe!important}