:root{color-scheme:dark;--bg:#181818;--panel:#202120;--line:#393c39;--text:#e5e5df;--muted:#b1b4ad;--accent:#b7ddc7;--gold:#deca9e}
*{box-sizing:border-box}
html{scroll-padding-top:24px}
body{margin:0;background:var(--bg);color:var(--text);font:13px/1.65 ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace}
a{color:var(--accent);text-underline-offset:4px}
button{font:inherit;color:inherit;cursor:pointer}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--gold);outline-offset:4px}
button:hover,.button:hover{background:#323c35}
.skip{position:absolute;left:12px;top:-60px;z-index:3;background:var(--accent);color:#142219;padding:10px}.skip:focus{top:8px}
header{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 24px;border-bottom:1px solid var(--line)}
.brand{text-decoration:none;color:var(--text);font-weight:700;letter-spacing:.07em}.brand span{font-weight:400;color:var(--muted);font-size:11px}
nav{display:flex;flex-wrap:wrap;gap:18px}header nav a{font-size:12px;text-decoration:none}
main{max-width:1320px;margin:auto;padding:0 24px}
.hero{display:grid;grid-template-columns:1.05fr 1fr;align-items:center;gap:30px;padding:46px 0 28px}
.eyebrow,.step-label,.index{font-size:10px;letter-spacing:.12em;color:var(--accent)}
.eyebrow{margin:0 0 10px}
h1{font-size:clamp(27px,3.1vw,42px);font-weight:600;letter-spacing:-.055em;line-height:1.18;margin:12px 0 18px}
h2{font-size:clamp(22px,2.3vw,29px);letter-spacing:-.045em;line-height:1.3;margin:0}
h3{font-size:16px;line-height:1.5;letter-spacing:-.02em;margin:10px 0}
p{color:var(--muted);margin:10px 0}strong{color:var(--text)}
.lead{font-size:14px;max-width:570px}.fine{font-size:11px;line-height:1.65}
.hero-image{margin:0;border:1px solid var(--line);background:#111818}
.hero-image img{display:block;width:100%;height:auto;aspect-ratio:1.65;object-fit:cover}
figcaption{display:flex;flex-wrap:wrap;justify-content:space-between;gap:6px;padding:9px 12px;font-size:9px;letter-spacing:.07em;color:var(--muted)}figcaption span:last-child{color:var(--accent)}
.actions{display:flex;flex-wrap:wrap;gap:8px;margin:20px 0 12px}
.button{display:inline-flex;align-items:center;justify-content:center;padding:10px 13px;min-height:42px;border:1px solid #526457;text-decoration:none;border-radius:3px;font-size:12px}
.button.primary{background:var(--accent);color:#17271d;font-weight:700}.button.primary:hover{background:#cdefd9}
.pathways{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:1px solid var(--line)}
.pathways a{display:flex;align-items:center;gap:14px;padding:15px;text-decoration:none;background:var(--panel)}
.pathways a+a{border-left:1px solid var(--line)}.pathways a>span:last-child{margin-left:auto}
.pathways a:hover{background:#29312b}.pathways strong{display:block;font-size:14px}.pathways div span{display:block;color:var(--muted);font-size:10px;margin-top:3px}
.section{padding-top:42px}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}
.section-lead{max-width:820px;margin-bottom:20px}.tag{padding:5px 8px;border:1px solid var(--line);font-size:10px;color:var(--gold);white-space:nowrap}
.panel{border:1px solid var(--line);border-radius:3px;background:var(--panel);padding:20px}
.experiment{display:grid;grid-template-columns:.85fr 1.15fr;gap:12px}
.answers{display:flex;flex-direction:column;gap:8px;margin:18px 0 12px}.answers button{padding:10px 12px;border:1px solid #50564f;background:#272a27;text-align:left;border-radius:3px;min-height:42px;font-size:12px}.answers button[aria-pressed=true]{border-color:var(--accent);color:var(--accent);background:#2d3c32}
.feedback{font-size:12px;color:var(--accent);min-height:20px}.feedback:empty{min-height:0;margin:0}
ol{padding-left:21px;color:var(--muted);margin:14px 0 18px}li{padding-left:3px;margin:8px 0}
.illustrated-steps{list-style:none;padding:0;margin:20px 0 10px}.illustrated-steps>li{display:grid;grid-template-columns:250px minmax(0,1fr);align-items:start;gap:24px;margin:0;padding:22px 0;border-top:1px solid var(--line)}.step-copy p{font-size:12px}.step-copy h3{margin-top:6px}
.lesson-shot{margin:0;border:1px solid var(--line);background:#111818;min-width:0}.lesson-shot>a{display:block}.lesson-shot img{display:block;width:100%;height:auto}.lesson-shot figcaption{font-size:11px;letter-spacing:0;padding:10px 12px}.lesson-shot figcaption a{white-space:nowrap}
@media(max-width:900px){.illustrated-steps>li{grid-template-columns:1fr;gap:12px}.step-copy{max-width:680px}}
.explanation{margin-top:12px}.explanation>p{max-width:1000px;font-size:12px}.table-scroll{overflow-x:auto;margin:10px 0 14px}
table{width:100%;border-collapse:collapse;font-size:12px;text-align:left}caption{text-align:left;color:var(--muted);font-size:11px;margin-bottom:8px}th,td{padding:10px;border-bottom:1px solid var(--line);vertical-align:top}thead th{font-size:10px;letter-spacing:.05em;color:var(--accent);font-weight:400}tbody th{font-weight:400;color:var(--text)}td{color:var(--muted)}
.code-trail{border:1px solid var(--line);margin-top:12px;border-radius:3px;padding:12px 16px}.code-trail summary{cursor:pointer;color:var(--accent)}.code-trail p{font-size:12px;max-width:1050px}
code{font:inherit;color:#d4dacd;overflow-wrap:anywhere}
.mini-labs{display:grid;grid-template-columns:1fr 1fr;gap:12px}.mini-lab{padding:0;overflow:hidden}.mini-lab img{width:100%;height:auto;aspect-ratio:2.6;object-fit:cover;display:block}.mini-lab>div{padding:16px}.mini-lab p{font-size:12px}
.copy-block{border:1px solid #49554b;border-radius:3px;overflow:hidden;margin:16px 0;background:#151915}.copy-heading{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:9px 14px;border-bottom:1px solid var(--line);font-size:10px;letter-spacing:.05em;color:var(--accent)}.copy-heading button{border:1px solid #526457;border-radius:3px;background:#262d27;padding:7px 10px;font-size:11px;letter-spacing:0;min-height:34px}
pre{margin:0;padding:17px;font:12px/1.85 ui-monospace,SFMono-Regular,Menlo,monospace;white-space:pre-wrap;overflow-wrap:anywhere;color:var(--text)}.prompt{border-color:#5b5546;background:#201f1b}.prompt .copy-heading{color:var(--gold)}
.architecture{display:grid;grid-template-columns:repeat(5,1fr);border:1px solid var(--line);background:var(--panel)}.architecture article{padding:16px}.architecture article+article{border-left:1px solid var(--line)}.architecture h3{font-size:14px;margin:6px 0}.architecture p{font-size:11px;margin:0}
.training-note{display:grid;grid-template-columns:1.5fr 1fr;gap:30px;margin-top:12px}.training-note h3{margin-top:0}.training-note p{font-size:12px}.training-links{display:flex;flex-direction:column;align-items:start;justify-content:center;gap:15px;font-size:12px}
footer{display:flex;flex-wrap:wrap;gap:20px;border-top:1px solid var(--line);padding:18px 0;margin-top:38px;font-size:10px;color:var(--muted)}footer span{margin-right:auto}
@media(max-width:900px){.hero{grid-template-columns:1fr;gap:18px;padding-top:28px}.hero-copy{max-width:740px}.hero-image img{aspect-ratio:2.4}.experiment{grid-template-columns:1fr 1fr}.architecture{grid-template-columns:1fr 1fr}.architecture article+article{border-left:0}.architecture article{border-bottom:1px solid var(--line)}.pathways a{padding:12px;gap:8px}.pathways div span{font-size:10px}.training-note{grid-template-columns:1fr;gap:10px}}
@media(max-width:600px){header{padding:12px;align-items:start;flex-direction:column;gap:8px}header nav{gap:14px}main{padding:0 12px}.hero{padding-top:25px}.hero-image img{aspect-ratio:1.8}.pathways{grid-template-columns:1fr}.pathways a+a{border-left:0;border-top:1px solid var(--line)}.experiment,.mini-labs{grid-template-columns:1fr}.section{padding-top:30px}.panel{padding:15px}.mini-lab{padding:0}.mini-lab>div{padding:15px}th,td{padding:8px 6px;font-size:11px}.section-heading{align-items:start}.copy-heading{padding:8px 10px}pre{padding:12px;font-size:11px}.architecture article{padding:12px}.button{font-size:11px}footer{gap:12px}}