/* PerceptionReflected: one stylesheet for every page. Matches the Black Box model's look. */
:root{
  color-scheme:dark;
  --bg:#000;--fg:#f2f2f2;--dim:#9a9a9a;--line:#2a2a2a;--panel:#0b0b0b;--accent:#b9e3e6;
  --serif:"Times New Roman",Times,serif;--head:Poppins,system-ui,sans-serif;--ui:Raleway,system-ui,sans-serif;
  --w:1080px;--prose:70ch;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:16px;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}
body{margin:0;background:var(--bg);color:var(--fg);font:18px/1.6 var(--serif);min-height:100vh;display:flex;flex-direction:column}
img{max-width:100%;height:auto}
a{color:var(--fg);text-decoration-color:#666;text-underline-offset:3px;text-decoration-thickness:1px}
a:hover{color:var(--accent);text-decoration-color:var(--accent)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
::selection{background:var(--accent);color:#000}
.skip{position:absolute;left:-999px;top:8px;background:var(--fg);color:#000;padding:8px 12px;font:400 14px var(--ui);z-index:10}
.skip:focus{left:8px}

/* header */
.site-head{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 28px;
  max-width:var(--w);width:100%;margin:0 auto;padding:22px 24px 18px;border-bottom:1px solid var(--line)}
.brand{display:flex;flex-direction:column;text-decoration:none;font:200 24px/1.1 var(--head);letter-spacing:.02em}
.brand span+span{color:#555;font-size:.75em;transform:scaleY(-1);-webkit-mask-image:linear-gradient(transparent,#000);mask-image:linear-gradient(transparent,#000)}
.brand:hover{color:var(--fg)}
.site-nav{display:flex;flex-wrap:wrap;gap:4px 18px;font:400 14px var(--ui);letter-spacing:.04em}
.site-nav a{text-decoration:none;color:var(--dim);padding:4px 0;border-bottom:1px solid transparent}
.site-nav a:hover{color:var(--fg)}
.site-nav a[aria-current=page]{color:var(--fg);border-bottom-color:var(--accent)}

/* layout */
main{flex:1;max-width:var(--w);width:100%;margin:0 auto;padding:32px 24px 64px}
h1,h2,h3{text-wrap:balance;font-family:var(--head);font-weight:200;line-height:1.2;letter-spacing:.01em}
h1{font-size:clamp(32px,5vw,52px);margin:8px 0 18px}
h2{font-size:clamp(24px,3vw,32px);margin:48px 0 14px}
h3{font-size:21px;margin:32px 0 10px;font-weight:400}
.lede{font-size:21px;color:#cfcfcf;max-width:var(--prose);margin-top:-6px}
.note{color:var(--dim);font-size:16px;border-left:2px solid var(--accent);padding-left:12px;margin-top:32px}
.byline{color:var(--dim)}
.site-foot{border-top:1px solid var(--line);color:#777;font:400 13px var(--ui);text-align:center;padding:20px 24px 28px}
.site-foot a{color:var(--dim)}

/* home */
.hero{display:grid;grid-template-columns:1.1fr 1fr;gap:32px;align-items:center}
.hero img{max-height:70vh;object-fit:contain}
.hero h1{font-size:clamp(38px,6vw,68px)}
.hero img{width:100%;border-radius:4px;filter:grayscale(1) contrast(1.05)}
.ctas{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.btn{display:inline-block;border:1px solid var(--fg);padding:10px 22px;font:400 14px var(--ui);letter-spacing:.06em;text-decoration:none;transition:background .15s,color .15s}
.btn:hover,.btn.solid{background:var(--fg);color:#000}
.btn.solid:hover{background:var(--accent);border-color:var(--accent);color:#000}
.band{margin:40px -24px;overflow:hidden;max-height:200px}
.band img{display:block;width:100%;height:200px;object-fit:cover}

/* lists of entries (home, models, writing) */
.entry{display:grid;grid-template-columns:56px 1fr;gap:18px;align-items:start;padding:18px 0;border-bottom:1px solid var(--line)}
.entry .icon{width:56px;height:56px;object-fit:contain;opacity:.85}
.entry p{margin:6px 0 0;color:#cfcfcf}
.title{font:200 24px/1.25 var(--head);text-decoration:none;display:inline-block}
a.title:hover{color:var(--accent)}
.entry:hover .icon{opacity:1}

/* references */
.refs{font-size:16px;line-height:1.5}
.refs p{padding-left:2em;text-indent:-2em;margin:0 0 12px;color:#cfcfcf;overflow-wrap:anywhere}

/* long-form text */
.prose{max-width:var(--prose)}
.prose p,.prose li{hyphens:auto}
.prose img,.prose figure img{width:100%;border-radius:4px}
.prose figure{margin:28px 0}
figcaption{color:var(--dim);font-size:15px;margin-top:8px}

/* reach out */
.org{display:grid;grid-template-columns:200px 1fr;gap:28px;align-items:start;padding:28px 0;border-bottom:1px solid var(--line)}
.org img{width:100%;border-radius:4px;background:#fff}
.org h2{margin-top:0}

/* illustrations: sideways gallery */
.slides{display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;padding:8px 0 20px;margin:0 -24px;padding-inline:24px}
.slides figure{flex:0 0 min(78vw,560px);margin:0;scroll-snap-align:center}
.slides img{width:100%;height:min(60vh,460px);object-fit:contain;background:#111;border-radius:4px}
.slides::-webkit-scrollbar{height:6px}.slides::-webkit-scrollbar-thumb{background:#333;border-radius:3px}

/* study atlas */
.study{max-width:none}
.study .prose,.study>p,.study>ul,.study>h2,.study>h3{max-width:var(--prose)}
.toc{background:var(--panel);border:1px solid var(--line);padding:16px 20px;margin:24px 0;font:400 15px/1.7 var(--ui);max-width:var(--prose)}
.toc ul{list-style:none;padding:0;margin:0}
.toc .sub{margin-left:1.2em}
.toc a{text-decoration:none;color:#cfcfcf}
.study ul{padding-left:1.2em}
.study li{margin:6px 0}
.study h2{border-top:1px solid var(--line);padding-top:28px}
.filter{width:100%;max-width:var(--prose);background:transparent;border:1px solid #555;color:var(--fg);font:16px var(--serif);padding:10px 12px;margin:4px 0 8px}
.filter:focus{border-color:var(--accent);outline:none}
mark{background:var(--accent);color:#000}
.top{position:fixed;right:18px;bottom:18px;border:1px solid #555;background:#000c;padding:6px 12px;font:400 13px var(--ui);text-decoration:none}

@media (max-width:760px){
  body{font-size:17px}
  .site-head{padding:16px 18px 14px}
  .site-nav{gap:2px 14px;font-size:13px}
  main{padding:24px 18px 48px}
  .hero{grid-template-columns:1fr}
  .hero img{max-height:45vh}
  .slides img{height:min(50vh,360px)}
  .band{margin-inline:-18px}
  .entry{grid-template-columns:40px 1fr;gap:14px}
  .entry .icon{width:40px;height:40px}
  .title{font-size:21px}
  .org{grid-template-columns:1fr}
  .org img{max-width:240px}
  .slides{margin-inline:-18px;padding-inline:18px}
}
@media print{
  body{background:#fff;color:#000}.site-head,.site-foot,.ctas,.band,.filter,.top{display:none}
  a{color:#000}.entry .icon{filter:none}
}

/* study atlas: contents stay beside the text on wide screens, like a docs site */
.toc a.here{color:var(--accent)}
@media (min-width:1180px){
  main:has(.study){max-width:1240px}
  .study{padding-left:300px}
  .study .toc{position:fixed;top:24px;width:268px;margin:0 0 0 -300px;max-height:calc(100vh - 48px);overflow:auto;font-size:14px}
  .study .toc[hidden]{display:none}
}

/* previous / next page */
.pager{display:flex;justify-content:space-between;gap:16px;margin-top:56px;padding-top:20px;border-top:1px solid var(--line);font:400 14px var(--ui)}
.pager a{text-decoration:none;display:flex;flex-direction:column;gap:2px}
.pager a span{color:var(--dim);font-size:12px;letter-spacing:.06em;text-transform:uppercase}
.pager .next{text-align:right;margin-left:auto}

/* study atlas: levels grid and technique cards */
.scroll-x{overflow-x:auto;margin:8px 0 24px}
.levels{border-collapse:collapse;min-width:760px;font:15px/1.4 var(--serif)}
.levels caption{text-align:left;color:var(--dim);font-size:15px;padding-bottom:10px}
.levels th,.levels td{border:1px solid var(--line);padding:8px 10px;vertical-align:top;text-align:left}
.levels thead th{font:400 13px var(--ui);letter-spacing:.06em;text-transform:uppercase;color:var(--dim)}
.levels tbody th{font:400 15px var(--head);white-space:nowrap}
.levels td a{text-decoration:none;border-bottom:1px solid #444}
.levels td a:hover{border-bottom-color:var(--accent)}
.trick{border-top:1px solid var(--line);padding:10px 0;max-width:var(--prose)}
.trick summary{cursor:pointer;font-size:17px}
.trick summary b{font:400 17px var(--head)}
.trick p{margin:8px 0 0 1.2em;color:#cfcfcf}
.trick[open] summary{color:var(--accent)}