@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap");
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:100px}
body{margin:0;background:var(--bg);color:var(--text);font:400 15px/1.7 Inter,system-ui,sans-serif}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
button,input,select{font:inherit}
button{cursor:pointer}
button,a,input,select,summary{-webkit-tap-highlight-color:transparent}
:focus-visible{outline:3px solid var(--purple);outline-offset:4px}
h1,h2,h3,h4,p,figure{margin:0}
h1,h2,h3,h4{line-height:1.18;letter-spacing:-.035em}
button{color:var(--text)}
[hidden]{display:none!important}
.hero-chart{height:240px;margin:12px -16px 0}
.learning-route{display:grid;grid-template-columns:repeat(3,1fr);gap:35px;padding:28px 0;border-block:1px solid var(--border)}
.learning-route>div{display:flex;gap:16px;align-items:flex-start}
.route-number{font:12px JetBrains Mono,monospace;color:var(--purple);padding-top:5px}
.learning-route strong{display:block;font-size:13px;font-weight:600}
.learning-route p span{display:block;font-size:11px;color:var(--text-muted);margin-top:4px}
.collection{padding-top:76px}
.section-heading{display:flex;justify-content:space-between;gap:25px;align-items:end;margin-bottom:30px}
.section-heading h2{font-size:36px;margin-top:12px}
.section-heading>p{font-size:13px;color:var(--text-muted);line-height:1.8}
.browse-bar{display:grid;grid-template-columns:1fr 220px 170px auto;gap:16px;align-items:end;padding:22px;background:var(--bg-card);border:1px solid var(--border);border-radius:14px}
.browse-bar label>span{display:block;font-size:10px;letter-spacing:.04em;color:var(--text-muted);margin-bottom:7px}
.browse-bar input,.browse-bar select{background:var(--bg);color:var(--text);border:1px solid var(--border);border-radius:7px;padding:10px 12px;width:100%;font-size:12px;min-height:42px}
.browse-bar input::placeholder{color:var(--text-muted)}
.reset-button{font-size:12px;border:0;background:transparent;min-height:42px;padding:8px}
.browse-meta{display:flex;justify-content:space-between;gap:15px;margin-top:14px;font-size:11px;color:var(--text-muted)}
.browse-meta>div{display:flex;gap:15px}
.browse-meta button{font-size:11px;color:var(--text-muted);border:0;background:none;padding:0}
.browse-meta button:hover{color:var(--blue)}
.chapter-nav{display:flex;flex-wrap:wrap;gap:8px;margin-top:26px}
.chapter-nav a{font-size:11px;color:var(--text-muted);padding:7px 12px;border:1px solid var(--border);border-radius:999px}
.chapter-nav a:hover{color:var(--blue);background:var(--wash);text-decoration:none}
.chapter-section{margin-top:55px}
.chapter-heading{display:flex;align-items:center;gap:18px;padding-bottom:22px}
.chapter-number{font:400 35px/1 JetBrains Mono,monospace;letter-spacing:-.08em;color:var(--purple);opacity:.9}
.chapter-heading h2{font-size:24px;letter-spacing:-.035em}
.chapter-heading p{color:var(--text-muted);font-size:12px;margin-top:4px}
.chapter-heading:after{content:"";height:1px;flex:1;background:var(--border);margin-left:15px}
.case{border:1px solid var(--border);border-radius:16px;background:var(--bg-card);margin-bottom:26px;overflow:hidden;scroll-margin-top:100px}
.case-inner{padding:32px 34px}
.case-topline{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:16px}
.case-kicker{font-size:10px;text-transform:uppercase;letter-spacing:.12em;color:var(--green);font-weight:600}
.case-id{font:10px JetBrains Mono,monospace;color:var(--text-muted)}
.case h3{font-size:29px;font-weight:600;max-width:800px}
.case-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:38px;margin-top:22px;align-items:start}
.research-question{font-size:15px;line-height:1.7;font-weight:500;border-left:2px solid var(--purple);padding-left:14px}
.label{font-size:10px;color:var(--text-muted);letter-spacing:.08em;text-transform:uppercase;font-weight:600;display:block;margin-bottom:6px}
.key-variables{display:flex;gap:6px;flex-wrap:wrap;margin-top:17px;margin-bottom:19px}
.key-variables span{font-size:10px;background:var(--wash);color:var(--blue);border:1px solid color-mix(in srgb,var(--blue) 15%,transparent);padding:3px 8px;border-radius:4px}
.case-story{font-size:13px;line-height:1.95;color:var(--text);text-wrap:pretty}
.takeaway{margin-top:18px;font-size:12px;line-height:1.8;color:var(--text-muted)}
.takeaway strong{display:block;color:var(--green);font-size:10px;letter-spacing:.08em;text-transform:uppercase;margin-bottom:4px}
.case-visual{min-width:0;background:var(--bg);padding:20px 14px 14px;border:1px solid var(--border);border-radius:12px}
.case-visual h4{font-size:15px;line-height:1.5;letter-spacing:-.02em;margin:0 8px}
.chart-hint{font-size:10px;color:var(--text-muted);margin:7px 8px 0}
.preview-chart{height:355px;min-width:0}
.case-visual figcaption{font-size:11px;line-height:1.8;color:var(--text-muted);margin:0 8px}
.chart-loading{height:100%;display:flex;align-items:center;justify-content:center;font-size:12px;color:var(--text-muted)}
.evidence-table{margin:12px 8px 0;font-size:11px}
.evidence-table summary{font-size:10px;color:var(--blue)}
.evidence-table table{margin-top:10px}
.case-bottom{display:flex;align-items:center;justify-content:space-between;gap:22px;border-top:1px solid var(--border);margin-top:26px;padding-top:22px}
.case-facts{display:flex;flex-wrap:wrap;gap:10px 18px;color:var(--text-muted);font-size:11px}
.case-facts strong{color:var(--text);font-weight:500}
.unit-note{font-size:11px;color:var(--text-muted);margin-top:7px}
.case-bottom .button{flex-shrink:0}
.case-reference{border-top:1px solid var(--border);background:color-mix(in srgb,var(--bg) 35%,var(--bg-card))}
.dictionary>summary{list-style:none;display:flex;justify-content:space-between;gap:20px;padding:17px 34px;font-size:12px;color:var(--text-muted);cursor:pointer}
.dictionary>summary::-webkit-details-marker{display:none}
.dictionary>summary:after{content:"+";color:var(--blue);font-size:18px;line-height:1}
.dictionary[open]>summary:after{content:"−"}
.dictionary-body{padding:5px 34px 25px}
.reference-note{color:var(--text-muted);font-size:12px;line-height:1.85;margin-bottom:18px}
.reference-links{display:flex;flex-wrap:wrap;gap:14px;font-size:11px;margin-top:18px}
.table-scroll{overflow:auto;max-height:480px;border:1px solid var(--border);border-radius:8px}
table{border-collapse:collapse;width:100%;font-size:11px}
th,td{text-align:left;vertical-align:top;padding:11px 12px;border-bottom:1px solid var(--border)}
th{position:sticky;top:0;background:var(--bg-card);font-weight:600;white-space:nowrap;z-index:1}
th button{background:transparent;border:0;color:var(--text);font-size:inherit;padding:0}
td.definition{min-width:240px;max-width:380px}
code{font:10px JetBrains Mono,monospace;color:var(--blue)}
.categories{min-width:150px;max-width:230px}
.category-row{margin-bottom:7px}
.mini-bar{height:3px;background:var(--border);margin-top:3px}
.mini-bar i{display:block;height:100%;background:var(--blue)}
.mini-hist{display:flex;gap:2px;align-items:end;height:34px;min-width:100px}
.mini-hist i{width:6px;background:var(--purple);display:block}
.type-badge{font-size:9px;border:1px solid var(--border);border-radius:3px;padding:2px 5px;color:var(--text-muted)}
.profile-meta{font-size:10px;color:var(--text-muted);margin-bottom:12px}
.empty-state{padding:60px 20px;text-align:center;border:1px dashed var(--border);border-radius:12px;margin-top:30px;color:var(--text-muted)}
.empty-state h3{font-size:22px;color:var(--text);margin-bottom:12px}
.empty-state button{margin-top:18px;background:none;border:1px solid var(--border);padding:10px 18px;border-radius:7px}
.simulation{background:linear-gradient(130deg,color-mix(in srgb,var(--purple) 9%,var(--bg-card)),var(--bg-card))}
.simulation-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;margin-top:20px}
.simulation-story{font-size:13px;line-height:1.95}
.simulation-story p+p{margin-top:16px}
.worlds{display:grid;grid-template-columns:repeat(2,1fr);gap:9px;align-content:start}
.world{border:1px solid var(--border);background:var(--bg);padding:13px 14px;border-radius:8px}
.world span{font:10px JetBrains Mono,monospace;color:var(--purple)}
.world strong{font-size:12px;display:block;margin-top:6px;line-height:1.5}
.world small{font-size:10px;color:var(--text-muted);display:block;margin-top:5px}
.simulation-note{font-size:11px;color:var(--text-muted);margin-top:16px}
.closing-note{text-align:center;padding:90px 0 70px;margin-top:40px;border-top:1px solid var(--border)}
.closing-note h2{font-size:36px;margin-top:20px;line-height:1.3}
.closing-note>p:not(.eyebrow){font-size:13px;color:var(--text-muted);margin-top:18px}
.closing-note .button{margin-top:25px}
.site-footer{display:flex;justify-content:space-between;gap:20px;font-size:10px;color:var(--text-muted);padding:25px 0 35px;border-top:1px solid var(--border)}
.site-footer span{padding:0 8px}
.plot-container .modebar{background:transparent!important}
.js-plotly-plot .plotly .modebar-btn path{fill:var(--text-muted)!important}
@media (max-width:1100px){.case-grid{gap:24px}
.browse-bar{grid-template-columns:1fr 180px 150px auto}
.case-inner{padding:28px}
.dictionary>summary{padding-inline:28px}
.case-bottom{align-items:flex-start}
.case-bottom .button{max-width:220px}
.case-story{font-size:12px}}
@media (max-width:850px){.hero-chart{height:250px}
.learning-route{gap:18px}
.learning-route>div{gap:10px}
.browse-bar{grid-template-columns:1fr 1fr}
.search-field{grid-column:1/-1}
.reset-button{grid-column:1/-1;min-height:28px}
.case-grid{grid-template-columns:1fr}
.case-story{font-size:14px}
.case-visual{margin-top:0}
.preview-chart{height:350px}
.case-bottom{align-items:center}
.simulation-grid{grid-template-columns:1fr}
.section-heading h2{font-size:30px}
.chapter-heading h2{font-size:23px}
.dictionary-body{padding-inline:20px}}
@media (max-width:520px){.hero-chart{margin-inline:-12px}
.learning-route{grid-template-columns:1fr;gap:20px;padding-block:25px}
.learning-route p span{font-size:12px}
.learning-route strong{font-size:14px}
.route-number{font-size:13px}
.learning-route>div{gap:18px}
.collection{padding-top:45px}
.section-heading{display:block}
.section-heading>p{margin-top:15px}
.section-heading>p br{display:none}
.browse-bar{padding:16px;gap:12px}
.browse-bar select{font-size:11px;padding:9px 7px}
.browse-meta{flex-direction:column;gap:10px}
.browse-meta>div{gap:14px}
.chapter-nav{gap:7px}
.chapter-nav a{font-size:10px;padding:6px 9px}
.chapter-section{margin-top:38px}
.chapter-heading{gap:12px}
.chapter-heading h2{font-size:20px}
.chapter-heading:after{display:none}
.chapter-number{font-size:29px}
.chapter-heading p{font-size:11px}
.case-inner{padding:22px 18px}
.case h3{font-size:26px}
.case-id{font-size:9px}
.case-topline{gap:7px;margin-bottom:13px}
.case-grid{margin-top:18px;gap:22px}
.case-story{font-size:13px;line-height:1.9}
.research-question{font-size:14px}
.case-visual{padding:16px 4px 12px;margin-inline:-7px}
.case-visual h4{font-size:14px}
.preview-chart{height:340px}
.case-bottom{display:block}
.case-bottom .button{margin-top:20px;width:100%;max-width:none}
.case-facts{gap:8px 14px}
.dictionary>summary{padding:15px 18px;font-size:11px}
.dictionary-body{padding-inline:16px}
.simulation-grid{gap:20px}
.worlds{gap:8px}
.world{padding:10px}
.world strong{font-size:11px}
.closing-note{padding-block:55px;margin-top:25px}
.closing-note h2{font-size:28px}
.closing-note>p:not(.eyebrow){font-size:12px}
.site-footer{display:block}
.site-footer>a{display:inline-block;margin-top:12px}}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}
*,*:before,*:after{transition:none!important;animation:none!important}}
@media print{.browse-bar,.browse-meta,.chapter-nav,.closing-note,.site-footer{display:none!important}
body{background:#fff;color:#111}
.case{break-inside:avoid}
.case-grid{display:block}
.case-visual{break-inside:avoid}
.dictionary>summary{display:none}
.dictionary-body{display:block!important}
.chapter-heading{margin-top:20px}}
.light .case-kicker,.light .takeaway strong{color:color-mix(in srgb,var(--green) 75%,var(--text))}
.case-story,.simulation-story{font-size:14px;line-height:1.9}
@media (max-width:520px){.case-story,.simulation-story{font-size:14px;line-height:1.9}}