:root{
  --paper:#fdfcf5;
  --ink:#1c1c1a;
  --ink-soft:#6c757d;
  --ink-body:#495057;
  --rule:#e2ded0;
  --card:#f3f1e6;
  --accent:#b5560c;
  --accent-soft:#f5e6d8;
  --accent-tag-text:#ffffff;
  --maxw:820px;
}
html.dark{
  --paper:#171714;
  --ink:#f2f0e6;
  --ink-soft:#a8a89c;
  --ink-body:#cfccbf;
  --rule:#33322a;
  --card:#221f1a;
  --accent:#e88a3d;
  --accent-soft:#2b2119;
  --accent-tag-text:#1a1108;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"Alegreya", Georgia, "Times New Roman", serif;
  font-size:19px;
  line-height:1.68;
  transition:background 0.2s ease, color 0.2s ease;
}

.site-header{
  border-bottom:1px solid var(--rule);
  background:var(--paper);
}
.site-header-inner{
  max-width:1180px;
  margin:0 auto;
  padding:18px 28px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  font-family:-apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}
.site-name{
  font-family:"Alegreya", Georgia, serif;
  font-weight:700;
  font-size:19px;
  color:var(--ink);
  text-decoration:none;
  white-space:nowrap;
}
.site-nav{display:flex; gap:22px; flex-wrap:wrap;}
.site-nav a{font-size:15px; color:var(--ink-soft); text-decoration:none;}
.site-nav a:hover{color:var(--ink);}
.theme-toggle{
  background:none; border:none; cursor:pointer;
  font-size:18px; color:var(--ink-soft); line-height:1; padding:4px;
}
@media (max-width:820px){.site-nav{display:none;}}

.wrap{max-width:var(--maxw); margin:0 auto; padding:0 24px 40px;}
main{max-width:var(--maxw); margin:0 auto; padding:8px 24px 0;}

.hero{max-width:var(--maxw); margin:0 auto; padding:56px 24px 20px;}
.kicker{
  display:inline-block;
  font-family:-apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size:12px;
  font-weight:600;
  letter-spacing:0.06em;
  text-transform:uppercase;
  background:var(--accent);
  color:var(--accent-tag-text);
  padding:5px 12px;
  border-radius:3px;
  margin-bottom:20px;
}
h1.title{
  font-size:clamp(32px, 5.5vw, 48px);
  line-height:1.12;
  margin:0 0 18px;
  font-weight:700;
}
.subtitle{
  font-size:20px;
  color:var(--ink-body);
  margin:0 0 22px;
  font-style:italic;
}
.byline{
  font-family:-apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size:14px;
  color:var(--ink-soft);
}

.note{
  background:var(--card);
  border-left:3px solid var(--accent);
  padding:20px 22px;
  margin:32px 0 0;
  font-size:16.5px;
  color:var(--ink-body);
  border-radius:2px;
}
.note a{color:var(--accent); text-decoration:underline;}
.note p{margin:0 0 10px;}
.note p:last-child{margin-bottom:0;}

h2{
  font-size:28px;
  margin:60px 0 18px;
  font-weight:700;
  line-height:1.25;
}
h2 .num{
  display:block;
  font-family:-apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size:12px;
  font-weight:600;
  text-transform:uppercase;
  letter-spacing:0.06em;
  color:var(--accent);
  margin-bottom:8px;
}
h3{
  font-size:21px;
  margin:36px 0 12px;
  font-weight:700;
  color:var(--accent);
}
p{margin:0 0 20px; color:var(--ink-body);}
strong{font-weight:700; color:var(--ink);}
em{font-style:italic;}
a{color:var(--accent);}

ul, ol{padding-left:24px; margin:0 0 20px; color:var(--ink-body);}
li{margin-bottom:10px;}

.prompt-box{
  background:var(--ink);
  color:var(--paper);
  padding:22px 26px;
  border-radius:6px;
  font-family:-apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size:17px;
  margin:26px 0;
  line-height:1.6;
}
html.dark .prompt-box{background:#0e0d0a; color:var(--paper);}
.prompt-box .tag{
  display:block; font-size:11px; letter-spacing:0.06em; text-transform:uppercase;
  color:var(--accent); margin-bottom:8px; font-weight:600;
}

.figure{margin:36px 0;}
.figure .placeholder{
  background:repeating-linear-gradient(135deg, var(--card), var(--card) 10px, var(--rule) 10px, var(--rule) 20px);
  border:1.5px dashed var(--ink-soft);
  border-radius:6px;
  min-height:220px;
  display:flex;
  align-items:center;
  justify-content:center;
  text-align:center;
  padding:24px;
}
.figure .placeholder span{
  font-family:-apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size:13.5px;
  color:var(--ink-soft);
  max-width:480px;
}
.figure figcaption{
  font-size:14.5px;
  color:var(--ink-soft);
  margin-top:10px;
  font-family:-apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  line-height:1.5;
  font-style:italic;
}

.circuit-grid{display:grid; grid-template-columns:1fr; gap:16px; margin:28px 0;}
.circuit-card{
  background:var(--card);
  border-radius:8px;
  padding:20px 22px;
  border-left:4px solid var(--accent);
}
.circuit-card h4{
  margin:0 0 6px;
  font-size:17px;
  font-family:-apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  color:var(--accent);
  font-weight:700;
}
.circuit-card p{margin:0; font-size:17px; color:var(--ink-body);}

.stat-row{display:flex; gap:14px; flex-wrap:wrap; margin:30px 0;}
.stat{
  background:var(--accent-soft);
  border-radius:8px;
  padding:16px 20px;
  flex:1 1 130px;
}
.stat .num{
  font-family:-apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size:22px;
  font-weight:700;
  color:var(--accent);
  display:block;
}
.stat .label{
  font-size:12.5px;
  color:var(--ink-soft);
  font-family:-apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

hr.divider{border:none; border-top:1px solid var(--rule); margin:52px 0;}

.aside{
  background:var(--card);
  border-radius:8px;
  padding:20px 22px;
  margin:26px 0;
  font-size:17px;
}
.aside .aside-label{
  font-family:-apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size:12px;
  font-weight:600;
  text-transform:uppercase;
  letter-spacing:0.05em;
  color:var(--accent);
  margin-bottom:8px;
  display:block;
}

.site-footer{
  border-top:1px solid var(--rule);
  margin-top:80px;
  padding:44px 28px 60px;
}
.site-footer-inner{
  max-width:1180px;
  margin:0 auto;
  display:flex;
  gap:60px;
  flex-wrap:wrap;
  font-family:-apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}
.footer-col h5{font-size:15px; font-weight:700; margin:0 0 12px; color:var(--ink);}
.footer-col p, .footer-col a{
  display:block; font-size:14px; color:var(--ink-soft); text-decoration:none; margin-bottom:6px;
}
.footer-col a:hover{color:var(--accent);}

@media (max-width:520px){
  body{font-size:17.5px;}
  h1.title{font-size:29px;}
  h2{font-size:22px;}
}