:root{--bg:#ffffff;--surface:#f4f6f9;--ink:#121722;--muted:#525b6b;--line:#e1e5ec;--accent:#1f7a5c;--accent-soft:#aee0cf66;--accent-ink:#ffffff;--font-display:system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--font-body:system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--font-mono:ui-monospace, "Cascadia Code", "SF Mono", Menlo, Consolas, monospace;--radius:10px;--hw:750;--ht:-0.022em;--fs:1.0625rem;color-scheme:light dark}
@media (prefers-color-scheme:dark){:root{--bg:#0f131a;--surface:#161c26;--ink:#e8ecf3;--muted:#9aa5b6;--line:#273142;--accent:#43c79b;--accent-soft:#1a564288;--accent-ink:#0b0f0d;}}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font-body);font-size:var(--fs);line-height:1.65;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;font-variant-numeric:lining-nums}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--accent);text-underline-offset:.18em;text-decoration-thickness:.07em}
a:hover{text-decoration-thickness:.14em}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:4px}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:var(--hw);letter-spacing:var(--ht);line-height:1.2;color:var(--ink);text-wrap:balance}
.skip-link{position:absolute;left:-999px;top:.5rem;background:var(--accent);color:var(--accent-ink);padding:.5rem 1rem;border-radius:var(--radius);z-index:10}
.skip-link:focus{left:.5rem}
.wrap{width:100%;max-width:74rem;margin:0 auto;padding:0 1rem}
@media (min-width:40rem){.wrap{padding:0 1.5rem}}

/* Header */
.site-header{background:var(--surface)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:4rem}
.brand{display:flex;align-items:center;gap:.6rem;text-decoration:none;color:var(--ink);font-family:var(--font-display);font-weight:var(--hw);font-size:1.2rem;letter-spacing:var(--ht)}
.brand-mark{width:2rem;height:2rem;flex:none}
.site-nav ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:.25rem 1.25rem}
.site-nav a{color:var(--muted);text-decoration:none;font-family:var(--font-body);font-size:.95rem;font-weight:550}
.site-nav a:hover,.site-nav a[aria-current="page"]{color:var(--ink)}
.menu{position:relative}
.menu summary{list-style:none;cursor:pointer;padding:.4rem .7rem;border:1px solid var(--line);border-radius:var(--radius);color:var(--ink);font-size:.95rem}
.menu summary::-webkit-details-marker{display:none}
.menu[open] .site-nav{position:absolute;right:0;top:calc(100% + .5rem);background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1rem;min-width:13rem;box-shadow:0 12px 32px -12px rgb(0 0 0/.25);z-index:5}
.menu[open] .site-nav ul{flex-direction:column}
.nav-wide{display:none}
@media (min-width:52rem){.nav-wide{display:block}.menu{display:none}}

/* Home */
.hero{padding:3.5rem 0 2.5rem}
.hero h1{font-size:clamp(2.1rem,5vw,3.4rem);margin:0 0 .75rem;max-width:20ch}
.hero p{font-size:1.15rem;color:var(--muted);max-width:60ch;margin:0}
.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:1rem;margin:2.5rem 0 1rem}
.section-head h2{font-size:1.4rem;margin:0}
.section-head a{font-size:.95rem;white-space:nowrap}

/* Cards */
.post-grid{display:grid;gap:1.25rem;grid-template-columns:repeat(auto-fill,minmax(min(100%,17rem),1fr))}
.card{background:var(--surface);border-radius:var(--radius);overflow:hidden;border:1px solid var(--line)}
.card-link{display:grid;height:100%;text-decoration:none;color:inherit}
.card-cover{aspect-ratio:16/9;overflow:hidden;background:var(--accent-soft)}
.card-cover svg{width:100%;height:100%}
.card-body{padding:1rem 1.1rem 1.2rem;display:flex;flex-direction:column;gap:.4rem}
.card-cat{font-family:var(--font-body);font-size:.75rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--accent)}
.card-title{font-size:1.15rem;margin:0;line-height:1.3}
.card-link:hover .card-title{text-decoration:underline;text-decoration-color:var(--accent);text-underline-offset:.15em}
.card-excerpt{margin:0;color:var(--muted);font-size:.95rem;line-height:1.55;font-family:var(--font-body)}
.card-meta{margin-top:auto;padding-top:.4rem;font-size:.8rem;color:var(--muted);font-family:var(--font-body)}
.cat-list{display:grid;gap:1rem;grid-template-columns:repeat(auto-fill,minmax(min(100%,16rem),1fr));padding:0;list-style:none}
.cat-list a{display:block;padding:1rem 1.1rem;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);text-decoration:none;color:var(--ink)}
.cat-list strong{display:block;font-family:var(--font-display);font-size:1.05rem}
.cat-list span{font-size:.9rem;color:var(--muted)}

/* Article */
.crumbs{font-size:.85rem;color:var(--muted);font-family:var(--font-body);margin:1.75rem 0 .75rem}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:.35rem;margin:0;padding:0}
.crumbs li+li::before{content:"/";margin-right:.35rem;color:var(--line)}
.crumbs a{color:var(--muted)}
.article-header h1{font-size:clamp(2rem,4.6vw,3rem);margin:.25rem 0 1rem;max-width:30ch}
.lede{font-size:1.2rem;color:var(--muted);margin:0 0 1.25rem;max-width:62ch}
.byline{display:flex;flex-wrap:wrap;gap:.35rem 1rem;font-size:.9rem;color:var(--muted);font-family:var(--font-body);padding-bottom:1.25rem;border-bottom:1px solid var(--line)}
.byline strong{color:var(--ink);font-weight:600}
.article-cover{margin:1.5rem 0;border-radius:var(--radius);overflow:hidden;height:clamp(150px,24vw,300px);background:var(--accent-soft)}
.article-cover img{width:100%;height:100%;object-fit:cover}
.article-figure{margin:1.5rem 0}
.article-figure .article-cover{margin:0;height:clamp(200px,34vw,420px)}
.photo-credit{margin-top:.4rem;font-family:var(--font-body);font-size:.75rem;color:var(--muted);text-align:right}
.photo-credit a{color:var(--muted)}
.card-cover img{width:100%;height:100%;object-fit:cover}
.article-cover svg{width:100%;height:100%}
.article-layout{display:grid;gap:2.5rem;margin-top:1.5rem}
@media (min-width:64rem){.article-layout{grid-template-columns:minmax(0,1fr) 16rem}.article-aside{position:sticky;top:1.5rem;align-self:start}}
.prose{max-width:70ch;min-width:0}
.prose>*+*{margin-top:1.15rem}
.prose p,.prose li{text-wrap:pretty}
.prose h2{font-size:1.6rem;margin-top:2.6rem;margin-bottom:0}
.prose h3{font-size:1.25rem;margin-top:1.9rem;margin-bottom:0}
.prose h2+*,.prose h3+*{margin-top:.75rem}
.prose ul,.prose ol{padding-left:1.4rem}
.prose li+li{margin-top:.35rem}
.prose blockquote{margin-left:0;padding:.75rem 1.1rem;border-left:4px solid var(--accent);background:var(--surface);border-radius:0 var(--radius) var(--radius) 0;color:var(--ink)}
.prose code{font-family:var(--font-mono);font-size:.9em;background:var(--surface);padding:.1em .35em;border-radius:4px}
.prose hr{border:0;border-top:1px solid var(--line);margin:2rem 0}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface)}
.table-wrap table{border-collapse:collapse;width:100%;font-family:var(--font-body);font-size:.95rem}
.table-wrap th,.table-wrap td{padding:.65rem .85rem;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
.table-wrap tr:last-child td{border-bottom:0}
.table-wrap th{font-weight:650;background:var(--accent-soft)}
.takeaways{background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:var(--radius);padding:1rem 1.25rem;font-family:var(--font-body);margin-bottom:1.5rem}
.takeaways h2{font-size:1rem;margin:0 0 .5rem;letter-spacing:.02em;font-family:var(--font-body)}
.takeaways ul{margin:0;padding-left:1.2rem}
.toc{font-family:var(--font-body);font-size:.92rem;border:1px solid var(--line);border-radius:var(--radius);padding:1rem 1.1rem;background:var(--surface)}
.toc h2{font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;margin:0 0 .6rem;color:var(--muted);font-family:var(--font-body)}
.toc ol{list-style:none;margin:0;padding:0;display:grid;gap:.45rem}
.toc .lvl3{padding-left:.9rem;font-size:.88rem}
.toc a{color:var(--ink);text-decoration:none}
.toc a:hover{color:var(--accent);text-decoration:underline}
.faq{margin-top:3rem}
.faq h2{font-size:1.5rem}
.faq details{border-top:1px solid var(--line);padding:.9rem 0}
.faq details:last-child{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;font-weight:650;font-family:var(--font-body)}
.faq details p{margin:.6rem 0 0;color:var(--ink)}
.ai-note{margin-top:2.5rem;font-size:.88rem;color:var(--muted);font-family:var(--font-body);padding:.85rem 1rem;border:1px dashed var(--line);border-radius:var(--radius)}
.author-box{margin-top:1.5rem;display:flex;gap:1rem;align-items:flex-start;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1.1rem 1.25rem;font-family:var(--font-body)}
.author-avatar{flex:none;width:3rem;height:3rem;border-radius:50%;background:var(--accent);color:var(--accent-ink);display:grid;place-items:center;font-weight:700;font-size:1.2rem}
.author-box p{margin:.25rem 0 0;font-size:.93rem;color:var(--muted)}
.related{margin-top:3.5rem}

/* Ads: clearly separated from content and labelled, as AdSense policy requires */
.ad-slot{margin:2rem 0;padding-top:.4rem;border-top:1px solid var(--line);min-height:120px}
.ad-label{display:block;font-family:var(--font-body);font-size:.68rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:.35rem}

/* Lists and pagination */
.page-header{padding:2.5rem 0 1rem}
.page-header h1{font-size:clamp(1.9rem,4vw,2.6rem);margin:0 0 .5rem}
.page-header p{color:var(--muted);margin:0;max-width:62ch}
.pagination{display:flex;justify-content:space-between;gap:1rem;margin:2.5rem 0;font-family:var(--font-body)}
.empty{padding:2rem;text-align:center;color:var(--muted);border:1px dashed var(--line);border-radius:var(--radius)}

/* Footer */
.site-footer{margin-top:4rem;padding:2.5rem 0 3rem;border-top:1px solid var(--line);background:var(--surface);font-family:var(--font-body);font-size:.92rem;color:var(--muted)}
.footer-grid{display:grid;gap:2rem;grid-template-columns:repeat(auto-fit,minmax(min(100%,12rem),1fr))}
.site-footer h2{font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;color:var(--ink);margin:0 0 .75rem;font-family:var(--font-body)}
.site-footer ul{list-style:none;margin:0;padding:0;display:grid;gap:.45rem}
.site-footer a{color:var(--muted)}
.site-footer a:hover{color:var(--ink)}
.footer-note{margin-top:2rem;padding-top:1.25rem;border-top:1px solid var(--line);font-size:.85rem}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
@media print{.site-header,.site-footer,.ad-slot,.article-aside,.related{display:none}}


.prose h2{display:flex;gap:.6rem;align-items:baseline}
.prose h2::before{content:"";flex:none;width:.55rem;height:.55rem;border-radius:2px;background:var(--accent);transform:translateY(-.12em)}
.site-header{border-bottom:1px solid var(--line)}