/* hotbotspot design draft: dark, black/white/grey only, system fonts, no external assets */
:root{
  --bg:#000;--panel:#0d0d0d;--box:#161616;--line:#2a2a2a;
  --text:#e8e8e8;--head:#fff;--muted:#9a9a9a;--soft:#c8c8c8;--bar:#5a5a5a;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --max:44rem;color-scheme:dark}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font:1.0625rem/1.7 var(--sans)}
a{color:inherit;text-decoration-color:#6a6a6a;text-underline-offset:3px;text-decoration-thickness:1px}
a:hover{color:var(--head);text-decoration-color:var(--head)}
::selection{background:var(--text);color:#000}
.wrap{max-width:var(--max);margin:0 auto;padding:0 1.5rem}

/* nav floats over the hero image */
header.site{position:absolute;top:0;left:0;right:0;z-index:2}
header.site .bar{max-width:80rem;margin:0 auto;padding:1.25rem 1.5rem;display:flex;flex-wrap:wrap;gap:.5rem 2rem;align-items:center;justify-content:space-between}
.logo{display:inline-flex;align-items:center;gap:1.25em;white-space:nowrap;font:700 .95rem/1 var(--sans);letter-spacing:.22em;text-transform:uppercase;text-decoration:none;color:var(--head)}
nav ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:.25rem 1.6rem}
nav a{font:600 .75rem/1.6 var(--sans);letter-spacing:.16em;text-transform:uppercase;text-decoration:none;color:var(--soft)}
nav a:hover,nav a[aria-current]{color:var(--head);text-decoration:underline;text-underline-offset:6px}

/* full-bleed image panels */
.panel{position:relative;display:flex;align-items:flex-end;min-height:100vh;min-height:100svh;padding:7rem 0 5rem;
  background:var(--bg) center/cover no-repeat;isolation:isolate}
.panel::before{content:"";position:absolute;inset:0;z-index:-1;
  background:linear-gradient(180deg,rgba(0,0,0,.55) 0%,rgba(0,0,0,.15) 35%,rgba(0,0,0,.75) 75%,#000 100%)}
.panel.short{min-height:60vh;min-height:60svh}
.panel .wrap{max-width:80rem;width:100%}
.panel .copy{max-width:40rem}
.panel.plain{min-height:0;background:var(--bg);padding:5rem 0;border-top:1px solid var(--line)}
.panel.plain::before{display:none}
.panel.plain .wrap{max-width:var(--max)}

.label{font:600 .72rem/1.4 var(--mono);letter-spacing:.2em;text-transform:uppercase;color:var(--muted);margin:0 0 1rem}
h1,h2{color:var(--head);text-transform:uppercase;font-weight:800;letter-spacing:-.01em;line-height:1.02;margin:0 0 1.25rem}
h1{font-size:clamp(2.4rem,7.5vw,5.2rem);max-width:15ch}
h2{font-size:clamp(1.7rem,4.5vw,3rem)}
.lead{font-size:1.2rem;color:var(--soft);max-width:34rem}
.panel p{max-width:38rem}

ul.rules{list-style:none;padding:0;margin:1.25rem 0;border-left:3px solid var(--bar);max-width:34rem}
ul.rules li{padding:.7rem 1rem;background:rgba(22,22,22,.85);border-top:1px solid var(--line)}
ul.rules li:first-child{border-top:0}
ul.rules li::before{content:"→ ";color:var(--muted);font-family:var(--mono)}

.btn{display:inline-block;margin-top:.75rem;padding:.85rem 1.4rem;border:2px solid var(--head);color:var(--head);
  font:700 .8rem/1 var(--sans);letter-spacing:.18em;text-transform:uppercase;text-decoration:none}
.btn:hover{background:var(--head);color:#000}

/* article reading column */
main.article{padding:3.5rem 0 5rem}
main.article h2{font-size:1.5rem;text-transform:none;letter-spacing:-.01em;margin:3rem 0 .75rem;padding-top:1.5rem;border-top:1px solid var(--line)}
.meta{font:.8rem var(--mono);color:var(--muted)}
.draft-note{font:500 .8rem/1.5 var(--mono);background:var(--box);border:1px dashed var(--bar);color:var(--soft);padding:.7rem .9rem;margin-bottom:2rem}
blockquote{margin:1.5rem 0;padding:.25rem 0 .25rem 1rem;border-left:3px solid var(--bar);color:#b0b0b0}
pre{background:var(--box);border:1px solid var(--line);color:#d8d8d8;padding:1rem;overflow-x:auto;font:.85rem/1.5 var(--mono)}

footer.site{border-top:1px solid var(--line);padding:2.5rem 0 3rem;font-size:.85rem;color:var(--muted)}
footer.site .wrap{max-width:80rem}
footer.site p{margin:.25rem 0}
footer.site .pub{font-size:.72rem}
footer.site .pub a{color:var(--muted);text-decoration-color:#3a3a3a}

@media (max-width:600px){
  .panel{padding:8rem 0 3.5rem}
  .panel.short{min-height:50svh}
  header.site .bar{padding:1rem 1.25rem}
  nav ul{gap:.25rem 1rem}
}
hr{border:0;border-top:1px solid var(--line);margin:2.5rem 0}
/* article page-info + related */
.page-info{display:flex;flex-wrap:wrap;gap:.75rem 2rem;margin:0 0 2.5rem;padding:1rem 1.1rem;background:var(--box);border-left:3px solid var(--bar);font:.8rem/1.5 var(--mono);color:var(--muted)}
.page-info div{margin:0}.page-info dt{text-transform:uppercase;letter-spacing:.16em;font-size:.68rem;color:#6f6f6f}.page-info dd{margin:0;color:var(--soft)}
.tag{display:inline-block;border:1px solid var(--line);padding:0 .45rem;margin:0 .3rem .3rem 0}
.related{margin-top:3rem;padding-top:1.5rem;border-top:1px solid var(--line)}
main.article .related h2{border:0;padding:0;margin:0 0 .75rem;font:600 .72rem/1.4 var(--mono);letter-spacing:.2em;text-transform:uppercase;color:var(--muted)}
.related ul{list-style:none;padding:0;margin:0;font-family:var(--mono);font-size:.9rem}.related .pending{color:var(--muted)}
.panel.art{background-position:center top;padding-top:9rem}
@media (max-width:600px){.panel.art{background-size:auto 100%;background-position:center top;padding-top:11rem}}
.panel.art::before{background:linear-gradient(90deg,rgba(0,0,0,.85) 0%,rgba(0,0,0,.45) 55%,rgba(0,0,0,.25) 100%),linear-gradient(180deg,rgba(0,0,0,0) 55%,#000 100%)}
/* tables + ordered lists */
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:1.5rem 0;border:1px solid var(--line)}
table{border-collapse:collapse;width:100%;font-size:.95rem}
@media (max-width:600px){th,td{padding:.55rem .6rem}table{font-size:.88rem}}
th,td{padding:.65rem .9rem;text-align:left;border-bottom:1px solid var(--line);border-right:1px solid var(--line);vertical-align:top}
th:last-child,td:last-child{border-right:0}
tbody tr:last-child td{border-bottom:0}
thead th{background:var(--box);color:var(--muted);font:600 .72rem/1.4 var(--mono);letter-spacing:.16em;text-transform:uppercase}
tbody td:first-child{color:var(--soft)}
main.article ol{padding-left:1.4rem}main.article ol li{margin:.4rem 0}main.article ol li::marker{color:var(--muted);font-family:var(--mono)}
/* in-body diagram */
figure.diagram{margin:2rem 0;border:1px solid var(--line);background:#000}
figure.diagram img{display:block;width:100%;height:auto}

/* levels */
/* levels draft */
.layout{display:grid;grid-template-columns:15rem minmax(0,1fr);border-top:1px solid var(--line)}
.levels{border-right:1px solid var(--line);background:var(--panel)}
.levels-wide{position:sticky;top:0;padding:2rem 1.5rem;max-height:100vh;overflow:auto}
.levels-phone{display:none}
.levels h3{font:600 .7rem/1.4 var(--mono);letter-spacing:.2em;text-transform:uppercase;color:var(--muted);margin:0 0 .5rem}
.levels section{margin-bottom:1.75rem}
.levels ul{list-style:none;margin:0;padding:0;font-size:.9rem}
.levels li{padding:.2rem 0}
.levels a{text-decoration:none;color:var(--soft)}
.levels a[aria-current]{color:var(--head);text-decoration:underline}
.levels .empty{color:#6f6f6f;font-size:.8rem}
.layout .panel{min-height:80vh}
.layout .panel.plain{min-height:0}
.layout main.article{padding-left:0;padding-right:0}
@media (max-width:900px){
  .layout{grid-template-columns:1fr}
  .levels{border-right:0;border-bottom:1px solid var(--line)}
  .levels-wide{display:none}
  .levels-phone{display:block;padding:0 1.25rem}
  .levels-phone summary{cursor:pointer;padding:1rem 0;font:600 .75rem/1.4 var(--mono);letter-spacing:.2em;text-transform:uppercase;color:var(--soft)}
  .levels-phone[open]{padding-bottom:.5rem}
  .layout .panel{min-height:100svh}
  .layout .panel.plain{min-height:0}
}
.logo-mark{height:24px;width:auto;flex:none}
@media(max-width:480px){.logo-mark{height:22px}}
ol.steps{padding:0;margin:1.25rem 0;border-left:3px solid var(--bar);max-width:34rem;list-style-position:inside}
ol.steps li{padding:.7rem 1rem;background:rgba(22,22,22,.85);border-top:1px solid var(--line)}
ol.steps li:first-child{border-top:0}
.wm b{font-size:1.4em;font-weight:inherit;line-height:0}
.layout>*{min-width:0}.levels li{overflow-wrap:anywhere}
.levels li{position:relative;padding:.3rem 0 .3rem 1rem;line-height:1.35}.levels li::before{content:"";position:absolute;left:.15rem;top:.85em;width:5px;height:5px;border-radius:50%;background:var(--muted)}.levels li:has(a[aria-current])::before{background:var(--head)}
main.article h3{font-size:1.15rem;margin:2rem 0 .5rem}
pre.brief{white-space:pre-wrap;overflow-wrap:anywhere}
pre.diagram-code{font-size:.75rem}
.prompt-box{margin:1.5rem 0}.prompt-box pre{margin:0}
.prompt-note{margin:0;padding:.6rem 1rem;border:1px solid var(--line);border-top:0;font-size:.85rem;color:var(--muted)}