/* Investigation reading surface, using the active KhanOS palette. */
:root{--bg:rgb(var(--p-base));--fg:rgb(var(--p-ink));--muted:rgb(var(--p-muted));--accent:rgb(var(--p-accent));--line:rgb(var(--p-edge) / .38)}
html{scroll-behavior:smooth;scroll-padding-top:32px}
body{font-size:17px;line-height:1.8}
a{text-underline-offset:4px}
.skip-link{position:absolute;top:8px;left:16px;transform:translateY(-150%);z-index:10;background:var(--fg);color:var(--bg);padding:8px 16px}
.skip-link:focus{transform:none}
.investigation-bar{max-width:1120px;margin:auto;padding:26px 32px;display:flex;align-items:center;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line);font-size:14px}
.investigation-bar>a{display:flex;align-items:center;gap:15px}
.investigation-bar .mono{color:var(--accent)}
.investigation-bar>span{font-size:12px;letter-spacing:1px;color:var(--muted)}
.investigation{width:min(860px,calc(100% - 48px));margin:0 auto}
.investigation-intro{padding:70px 0 40px}
.eyebrow{color:var(--accent);font-size:12px;margin:0 0 20px}
h1{font:500 clamp(36px,5.5vw,60px)/1.1 var(--display);letter-spacing:-2px;margin:0 0 26px}
.intro{font-size:20px;line-height:1.7;max-width:760px;color:var(--fg)}
.byline{color:var(--muted);font:13px/1.8 var(--mono);display:flex;gap:12px;flex-wrap:wrap;margin:24px 0}
.article-jumps{display:flex;gap:24px;flex-wrap:wrap;margin-top:32px;padding-block:20px;border-block:1px solid var(--line);font-size:14px}
.article-jumps a{display:flex;gap:15px;align-items:center}
.article-jumps span{color:var(--accent)}
.article-jumps a:hover,.investigation-bar a:hover{color:var(--accent)}
.lab-step{display:grid;grid-template-columns:48px minmax(0,1fr);gap:20px;padding:30px 0 14px}
.step-number{font:400 30px/1.2 var(--mono);color:var(--accent);padding-top:4px}
.step-body{min-width:0;padding-bottom:24px;border-bottom:1px solid var(--line)}
h2{font:500 clamp(24px,3.5vw,30px)/1.3 var(--display);letter-spacing:-.6px;margin:0 0 20px}
h3{font:500 23px/1.4 var(--display);margin:36px 0 16px}
.recap-heading{color:#e34c67}
p{margin:0 0 18px;color:var(--muted)}
strong{color:var(--fg);font-weight:600}
.step-body>p:last-child{margin-bottom:0}
.takeaway{margin-top:24px}
.resource-outline{margin:28px 0 0;padding:18px 22px;border:1px solid var(--line);border-radius:8px;background:rgb(var(--p-panel) / .65);font-size:15px}
.resource-outline div{margin:12px 0 0 10px;padding:8px 0 0 18px;border-left:1px solid rgb(var(--p-accent) / .5)}
.resource-outline small{font-size:13px;color:var(--muted);margin-left:8px}
.log-flow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));list-style:none;padding:20px 0;margin:24px 0;gap:22px;border-block:1px solid var(--line)}
.log-flow li{position:relative}
.log-flow li+li:before{content:'→';position:absolute;left:-19px;color:var(--accent)}
.log-flow strong{display:block;font:500 14px/1.6 var(--mono)}
.log-flow span{display:block;color:var(--muted);font-size:13px;line-height:1.5;margin-top:6px}
code{font:14px/1.8 var(--mono);color:var(--fg);overflow-wrap:anywhere}
pre{background:rgb(var(--p-panel));border:1px solid var(--line);padding:24px;overflow:auto;border-radius:7px;white-space:pre-wrap;margin:22px 0}
.reference{font-size:14px}
a.reference,.reference a,.investigation-footer p a{text-decoration:underline;text-decoration-color:rgb(var(--p-accent) / .65)}
figure{margin:28px 0}
figure a{display:block;border-radius:7px}
figure img{display:block;width:100%;height:auto;border-radius:7px;background:#fff}
figcaption{font-size:14px;line-height:1.7;color:var(--muted);margin-top:14px}
figcaption>span{font:12px var(--mono);color:var(--accent);margin-right:8px;text-transform:uppercase}
.article-section{padding:44px 0 24px;margin-left:68px;border-bottom:1px solid var(--line)}
.article-section>.eyebrow{margin-bottom:15px}
.evidence-detail{margin:24px 0;border-block:1px solid var(--line);padding:16px 0}
summary{cursor:pointer;font-size:15px;color:var(--fg)}
summary:focus-visible{outline:2px solid var(--accent);outline-offset:5px}
table{width:100%;border-collapse:collapse;font-size:16px;margin:24px 0 12px;text-align:left}
caption{text-align:left;color:var(--muted);font-size:14px;margin-bottom:12px}
th,td{padding:15px 18px;border:1px solid var(--line);vertical-align:top}
thead{background:rgb(var(--p-panel))}
tbody th{font:500 14px/1.8 var(--mono);width:29%;color:var(--fg)}
td{color:var(--muted)}
.table-scroll{overflow-x:auto;margin:24px 0 12px}
.table-scroll:focus-visible{outline:2px solid var(--accent);outline-offset:5px}
.scan-results{min-width:480px;margin:0;font-variant-numeric:tabular-nums}
.scan-results td{text-align:center}
.scan-results tbody th{width:auto}
blockquote{margin:0 0 24px;padding:0 0 0 24px;border-left:2px solid var(--accent);font-size:19px;line-height:1.8;color:var(--fg)}
.scope{font-size:15px}
.lab-readme{margin:30px 0;border:1px solid var(--line);border-radius:8px;background:rgb(var(--p-panel) / .55);overflow:hidden}
.lab-readme>summary{padding:18px 22px;font:14px/1.7 var(--mono);color:var(--fg)}
.lab-readme>summary::marker{color:var(--accent)}
.lab-readme>summary:focus-visible{outline:2px solid var(--accent);outline-offset:-3px}
.readme-title{margin-left:6px;color:var(--accent);letter-spacing:1px}
.readme-subtitle{margin-left:18px;font-size:12px;color:var(--muted)}
.lab-readme[open]>summary{border-bottom:1px solid var(--line)}
.readme-content{padding:24px}
.readme-content .readme-context{font-size:14px;margin-bottom:26px}
.readme-content section+section{margin-top:26px;padding-top:24px;border-top:1px solid var(--line)}
.readme-content h2{font:500 15px/1.6 var(--mono);letter-spacing:0;margin:0 0 12px}
.readme-content p{font-size:15px;margin:0 0 12px}
.readme-content pre{margin:0;padding:15px 18px}
.readme-content pre code{overflow-wrap:anywhere}
.readme-login{display:grid;grid-template-columns:100px minmax(0,1fr);gap:8px 16px;margin:0;font-size:14px}
.readme-login dt{color:var(--muted)}
.readme-login dd{margin:0}
.investigation-footer{padding:32px 0 56px;margin-left:68px;font-size:14px}
.investigation-footer>a{display:inline-block;margin-top:12px;color:var(--fg)}
@media(max-width:620px){
  body{font-size:16px}
  .investigation-bar{padding:20px 24px}
  .investigation-bar>span{display:none}
  .investigation-intro{padding-top:40px}
  h1{letter-spacing:-1px}
  h1 br{display:none}
  .intro{font-size:18px}
  .lab-readme>summary{padding:16px}
  .readme-subtitle{margin-left:10px}
  .readme-content{padding:18px}
  .readme-login{grid-template-columns:1fr;gap:4px}
  .readme-login dd+dt{margin-top:8px}
  .article-jumps{gap:12px 20px}
  .lab-step{grid-template-columns:1fr;gap:10px;padding-top:22px}
  .step-number{font-size:24px}
  .article-section,.investigation-footer{margin-left:0}
  .resource-outline{padding:16px}
  .resource-outline small{display:block;margin:2px 0 0}
  .log-flow{grid-template-columns:1fr;gap:10px}
  .log-flow li+li:before{display:none}
  .log-flow li:after{content:'↓';display:block;color:var(--accent)}
  .log-flow li:last-child:after{content:''}
  pre{padding:18px;font-size:12px}
  pre code{font-size:12px}
  th,td{padding:12px 10px}
  tbody th{width:32%}
  blockquote{padding-left:18px;font-size:17px}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media print{
  :root{--bg:#fff;--fg:#111;--muted:#333;--accent:#222;--line:#ccc}
  body{font:11pt/1.5 Arial,sans-serif;background:white;color:#111}
  .investigation{width:100%;max-width:none}
  .investigation-bar,.article-jumps,.skip-link{display:none}
  .investigation-intro{padding-top:0}
  h1{font-size:30pt}
  h2{font-size:18pt}
  .intro,blockquote{font-size:12pt}
  .lab-step{padding-top:18px;gap:12px;grid-template-columns:32px minmax(0,1fr)}
  .article-section,.investigation-footer{margin-left:44px}
  .article-section{padding-top:24px}
  .step-number{font-size:19pt}
  p{orphans:3;widows:3}
  h2,h3{break-after:avoid}
  figure,table,pre,.log-flow,.resource-outline{break-inside:avoid}
  pre,.resource-outline,thead{background:white}
  .resource-outline{color:#111}
  .evidence-detail{display:none}
}