:root{--bg:#fffdf5;--fg:#1e293b;--muted:#f1f5f9;--muted-fg:#64748b;--accent:#8b5cf6;--secondary:#38bdf8;--tertiary:#fbbf24;--green:#34d399;--border:#1e293b;--card:#fff;--display:'Outfit',sans-serif;--body:'Plus Jakarta Sans',sans-serif;--mono:'JetBrains Mono',monospace}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;padding-bottom:76px;background:var(--bg);color:var(--fg);font-family:var(--body);line-height:1.72}a{color:inherit}.wrap{width:min(1120px,calc(100% - 40px));margin:auto}.reading{width:min(760px,calc(100% - 40px));margin:auto}
.site-nav{position:sticky;top:0;z-index:20;background:rgba(255,253,245,.96);border-bottom:2px solid var(--border)}.site-nav .wrap{min-height:66px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{font:800 19px var(--display);text-decoration:none}.brand span{display:inline-block;margin-left:4px;padding:2px 8px;border:2px solid var(--border);border-radius:6px;background:var(--accent);color:white}.nav-links{display:flex;gap:20px;align-items:center}.nav-links a{font:700 12px var(--mono);text-decoration:none}.nav-links a:hover{text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:5px}.nav-links a:last-child{position:fixed;right:20px;bottom:20px;z-index:40;display:flex;align-items:center;gap:8px;padding:13px 18px;border:2.5px solid var(--border);border-radius:999px;background:var(--accent);color:#fff;box-shadow:3px 3px 0 var(--border);transition:transform .15s ease}.nav-links a:last-child::before{content:'';width:10px;height:10px;border-radius:50%;background:#42dda3;box-shadow:0 0 0 0 rgba(66,221,163,.65);animation:ctaPulse 1.8s infinite;flex:0 0 auto}@keyframes ctaPulse{70%{box-shadow:0 0 0 8px transparent}100%{box-shadow:0 0 0 0 transparent}}.nav-links a:last-child:hover{transform:translateY(-2px);text-decoration:none}.nav-links a:last-child:active{transform:translate(2px,2px)}
.library-hero,.article-hero{border-bottom:2px solid var(--border);background:linear-gradient(135deg,#fffdf5 55%,#f3efff)}.library-hero{padding:76px 0 64px}.article-hero{padding:68px 0 50px}.eyebrow{display:inline-flex;padding:5px 11px;border:2px solid var(--border);border-radius:999px;background:var(--tertiary);font:800 11px var(--mono);letter-spacing:.04em;text-transform:uppercase}.library-hero h1,.article-hero h1{margin:18px 0 14px;font:800 clamp(38px,7vw,72px)/.98 var(--display);letter-spacing:-.04em}.article-hero h1{font-size:clamp(36px,6vw,62px);max-width:920px}.dek{max-width:760px;margin:0;color:#475569;font-size:clamp(17px,2.2vw,21px);line-height:1.55}.byline{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:24px;font:700 12px var(--mono);color:#64748b}.byline span:first-child{color:var(--fg)}
.library-main{padding:56px 0 80px}.cluster-head{display:grid;grid-template-columns:1fr 1.3fr;gap:24px;align-items:end;margin-bottom:26px}.cluster-head h2{margin:0;font:800 clamp(28px,4vw,42px)/1.05 var(--display)}.cluster-head p{margin:0;color:var(--muted-fg)}.card-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-bottom:56px}.article-card{display:flex;flex-direction:column;min-height:270px;padding:25px;border:2px solid var(--border);border-radius:20px 20px 20px 6px;background:var(--card);box-shadow:5px 5px 0 var(--border);text-decoration:none;transition:.15s transform,.15s box-shadow}.article-card:hover{transform:translateY(-3px);box-shadow:5px 8px 0 var(--border)}.article-card .tag{font:800 10px var(--mono);text-transform:uppercase;color:var(--accent)}.article-card h3{margin:12px 0 10px;font:800 25px/1.1 var(--display)}.article-card p{margin:0;color:#526073;font-size:14px}.article-card .read{margin-top:auto;padding-top:20px;font:800 12px var(--mono)}
.article-layout{display:grid;grid-template-columns:minmax(0,760px) 250px;gap:62px;align-items:start;padding:54px 0 90px}.article-body{font-size:17px}.article-body>p:first-child{font-size:20px;line-height:1.6}.article-body h2{margin:54px 0 14px;font:800 34px/1.1 var(--display);letter-spacing:-.02em}.article-body h3{margin:32px 0 10px;font:800 23px/1.2 var(--display)}.article-body ul,.article-body ol{padding-left:24px}.article-body li{margin:9px 0}.article-body strong{font-weight:800}.article-body a{text-decoration-thickness:2px;text-underline-offset:3px}.toc{position:sticky;top:92px;padding:18px;border:2px solid var(--border);border-radius:16px;background:var(--card);box-shadow:4px 4px 0 var(--border)}.toc b{display:block;margin-bottom:10px;font:800 11px var(--mono);text-transform:uppercase}.toc a{display:block;padding:7px 0;border-bottom:1px dashed #cbd5e1;color:#526073;font-size:12px;text-decoration:none}.toc a:last-child{border:0}.toc a:hover{color:var(--accent)}
.field-note,.calculation,.tool-card,.warning{margin:28px 0;padding:22px 24px;border:2px solid var(--border);border-radius:16px;background:var(--card);box-shadow:4px 4px 0 var(--border)}.field-note{background:#f4efff}.field-note::before,.calculation::before,.warning::before{display:block;margin-bottom:8px;font:800 11px var(--mono);letter-spacing:.05em;text-transform:uppercase}.field-note::before{content:'AndChill field note';color:#6d28d9}.calculation{background:#fffbdb}.calculation::before{content:'Worked example';color:#92400e}.warning{background:#ecfeff}.warning::before{content:'Important distinction';color:#0e7490}.calculation table{width:100%;border-collapse:collapse;margin-top:10px;font:600 14px/1.4 var(--mono)}.calculation td{padding:8px 4px;border-bottom:1px dashed #94a3b8}.calculation td:last-child{text-align:right}.calculation tr:last-child td{border-top:2px solid var(--border);border-bottom:0;font-weight:800}.formula{overflow-x:auto;padding:12px 14px;border-radius:10px;background:rgba(255,255,255,.72);font:800 14px var(--mono)}.tool-card{display:grid;grid-template-columns:1fr auto;gap:18px;align-items:center;background:#ecfdf5}.tool-card h3{margin:0 0 4px}.tool-card p{margin:0;color:#526073;font-size:14px}.button{display:inline-flex;align-items:center;justify-content:center;padding:12px 17px;border:2px solid var(--border);border-radius:999px;background:var(--fg);color:white!important;box-shadow:3px 3px 0 var(--accent);font:800 12px var(--mono);text-decoration:none!important;white-space:nowrap}.button:hover{transform:translateY(-2px)}
.checklist{padding:0;list-style:none}.checklist li{position:relative;padding:12px 12px 12px 42px;border-bottom:1px solid #dbe2ea}.checklist li::before{content:'✓';position:absolute;left:10px;top:11px;display:grid;place-items:center;width:22px;height:22px;border:2px solid var(--border);border-radius:6px;background:var(--green);font:900 12px var(--mono)}.sources{margin-top:58px;padding-top:28px;border-top:2px solid var(--border)}.sources h2{margin-top:0}.sources ol{font-size:13px;color:#526073}.sources li{margin-bottom:12px}.book-note{font-size:13px;color:#526073}.cta{margin-top:54px;padding:32px;border:2px solid var(--border);border-radius:22px;background:var(--accent);color:white;box-shadow:6px 6px 0 var(--border)}.cta h2{margin:0 0 9px;color:white}.cta p{margin:0 0 20px;max-width:600px}.cta .button{background:white;color:var(--fg)!important;box-shadow:3px 3px 0 var(--tertiary)}
.site-footer{padding:34px 0 60px;border-top:2px solid var(--border);font:700 11px var(--mono)}.site-footer .wrap{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}.disclaimer{margin-top:36px;padding:18px;border-left:4px solid var(--tertiary);background:var(--muted);font-size:12px;color:#526073}
@media(max-width:880px){.article-layout{grid-template-columns:1fr}.toc{display:none}.cluster-head{grid-template-columns:1fr}.card-grid{grid-template-columns:1fr}.nav-links a:not(:last-child){display:none}}@media(max-width:580px){.wrap,.reading{width:min(100% - 28px,1120px)}.library-hero,.article-hero{padding:48px 0 40px}.article-layout{padding-top:34px}.article-body{font-size:16px}.article-body h2{font-size:29px}.tool-card{grid-template-columns:1fr}.button{white-space:normal;text-align:center}.field-note,.calculation,.tool-card,.warning{padding:18px}.nav-links a:last-child{right:14px;bottom:14px;padding:11px 14px}}
[data-theme="dark"]{--bg:#111827;--fg:#f8fafc;--muted:#1f2937;--muted-fg:#cbd5e1;--border:#f8fafc;--card:#1d2940}
.site-nav{background:color-mix(in srgb,var(--bg) 96%,transparent)}
.library-hero,.article-hero{background:linear-gradient(135deg,var(--bg) 55%,color-mix(in srgb,var(--accent) 14%,var(--bg)))}
.nav-links a:last-child{left:auto;right:20px}
.insights-theme-toggle{position:fixed;left:20px;bottom:20px;z-index:40;width:40px;height:40px;display:grid;place-items:center;border:2px solid var(--border);border-radius:50%;background:var(--card);color:var(--fg);box-shadow:3px 3px 0 var(--border);font:800 15px var(--mono);cursor:pointer}
[data-theme="dark"] .dek,[data-theme="dark"] .article-card p,[data-theme="dark"] .cluster-head p,[data-theme="dark"] .tool-card p,[data-theme="dark"] .sources ol,[data-theme="dark"] .book-note,[data-theme="dark"] .disclaimer,[data-theme="dark"] .toc a{color:#cbd5e1}
[data-theme="dark"] .field-note{background:#2e2450}[data-theme="dark"] .calculation{background:#3a3317}[data-theme="dark"] .warning{background:#14353b}[data-theme="dark"] .tool-card{background:#14382d}[data-theme="dark"] .formula{background:rgba(17,24,39,.72)}[data-theme="dark"] .cta .button{color:#111827!important}[data-theme="dark"] .nav-links a:last-child{background:#f8fafc;color:#111827;border-color:#8b5cf6;box-shadow:3px 3px 0 #8b5cf6}
@media(max-width:580px){.nav-links a:last-child{left:auto;right:14px}.insights-theme-toggle{left:14px;bottom:14px}}