/* =====================================================================
   Blog (/blog index and /blog/<slug> articles). Shared tokens from styles.css.
   The @media print block at the end is the PDF layout (src/make-pdfs.mjs).
   ===================================================================== */

/* breadcrumbs */
.crumbs ol{display:flex;flex-wrap:wrap;gap:6px 0;font-size:13px;color:var(--faint);margin-bottom:22px}
.crumbs li{display:flex;align-items:center}
.crumbs li + li::before{content:"/";margin:0 10px;color:var(--line)}
.crumbs a{color:var(--muted);transition:color 400ms}
.crumbs a:hover{color:var(--cyan)}
.crumbs [aria-current]{color:var(--ink)}

/* ---------- index ---------- */
.blog-hero h1{max-width:16ch}
.blog-list{padding-top:0}
.post-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,420px),1fr));gap:24px}
.post-card{display:flex;flex-direction:column;background:linear-gradient(180deg,rgba(30,41,59,.42),rgba(17,24,39,.62));border:1px solid var(--hair);border-radius:var(--r-lg);overflow:hidden;transition:border-color 600ms var(--ease),transform 600ms var(--ease),box-shadow 600ms var(--ease)}
.post-card:hover{border-color:rgba(0,196,255,.35);box-shadow:0 24px 60px -30px rgba(0,196,255,.35)}
.pc-img{display:block;aspect-ratio:16/9;overflow:hidden;background:var(--mid)}
.pc-img img{width:100%;height:100%;object-fit:cover;transition:transform 1200ms var(--ease)}
.post-card:hover .pc-img img{transform:scale(1.035)}
.pc-body{display:flex;flex-direction:column;gap:12px;padding:clamp(20px,2.6vw,30px);flex:1}
.pc-body .kicker{margin:0}
.pc-title{font-size:clamp(1.35rem,2vw,1.7rem);line-height:1.18;letter-spacing:-.025em}
.pc-title a{background:linear-gradient(currentColor,currentColor) 0 100%/0 1px no-repeat;transition:background-size 600ms var(--ease)}
.pc-title a:hover{background-size:100% 1px}
.pc-title a::after{content:"";position:absolute;inset:0}          /* whole card is clickable */
.post-card{position:relative}
.pc-lede{color:var(--muted);font-size:.98rem;margin:0}
.pc-foot{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:auto;padding-top:14px;border-top:1px solid var(--hair)}
.post-meta{font-size:.88rem;color:var(--muted);margin:0}
.post-meta a{color:var(--ink);border-bottom:1px solid var(--line)}
.post-meta a:hover{color:var(--cyan);border-color:var(--cyan)}
.pc-dl{position:relative;z-index:1;display:inline-flex;align-items:center;gap:7px;font-size:12.5px;font-weight:600;letter-spacing:.06em;color:var(--cyan);padding:7px 12px;border:1px solid rgba(0,196,255,.3);border-radius:999px;transition:background 400ms,border-color 400ms}
.pc-dl:hover{background:rgba(0,196,255,.1);border-color:var(--cyan)}
.pc-dl svg,.post-dl svg,.post-share svg,.toc-dl svg{width:15px;height:15px;flex:none}

/* ---------- article ---------- */
.read-progress{position:fixed;top:0;left:0;right:0;height:2px;z-index:70;pointer-events:none}
.read-progress i{display:block;height:100%;width:100%;background:linear-gradient(90deg,var(--cyan),var(--nir));transform-origin:left center;transform:scaleX(var(--p,0));box-shadow:0 0 10px rgba(0,196,255,.6)}
.post-head{padding:calc(136px + env(safe-area-inset-top)) 0 clamp(28px,4vw,44px)}
.post-head h1{font-size:clamp(2.1rem,4.4vw,3.9rem);max-width:20ch}
.post-head .lede{margin-top:22px;max-width:62ch}
.post-meta-row{display:flex;justify-content:space-between;align-items:center;gap:16px 24px;flex-wrap:wrap;margin-top:28px;padding-top:20px;border-top:1px solid var(--hair)}
.post-actions{display:flex;gap:10px;flex-wrap:wrap}
.post-actions .btn{gap:8px;padding:8px 16px;min-height:42px}
.post-share.copied{border-color:var(--cyan);color:var(--cyan)}
.print-brand{display:none}
.post-hero{margin:0 auto}
.post-hero picture{display:block;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--hair);aspect-ratio:16/9;background:var(--mid)}
.post-hero img{width:100%;height:100%;object-fit:cover}
.post-layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:clamp(32px,6vw,88px);align-items:start;padding:clamp(40px,6vw,72px) 0 clamp(56px,7vw,96px)}

/* table of contents */
.toc{position:sticky;top:110px;display:grid;gap:18px}
.toc-box summary{list-style:none;font-size:11.5px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin-bottom:14px;cursor:default}
.toc-box summary::-webkit-details-marker{display:none}
.toc ol{counter-reset:t;border-left:1px solid var(--hair)}
.toc li{counter-increment:t}
.toc li a{display:grid;grid-template-columns:26px 1fr;padding:7px 0 7px 14px;margin-left:-1px;border-left:1px solid transparent;font-size:.9rem;line-height:1.35;color:var(--muted);transition:color 400ms,border-color 400ms}
.toc li a::before{content:counter(t,decimal-leading-zero);font-size:11px;font-weight:700;color:var(--faint);padding-top:2px}
.toc li a:hover{color:var(--ink)}
.toc li a.on{color:var(--ink);border-left-color:var(--cyan)}
.toc li a.on::before{color:var(--cyan)}
.toc-dl{display:inline-flex;align-items:center;gap:8px;font-size:.85rem;font-weight:600;color:var(--cyan);padding-top:16px;border-top:1px solid var(--hair)}
.toc-dl:hover{text-decoration:underline;text-underline-offset:3px}

/* prose */
.prose{max-width:720px;font-size:1.06rem;line-height:1.78;color:#C6D0DE}
.prose > *{margin-bottom:0}
.prose > * + *{margin-top:1.1em}
.prose p{max-width:none}
.prose .lead-p{font-size:clamp(1.15rem,1.5vw,1.28rem);line-height:1.65;color:var(--ink)}
.prose h2{font-size:clamp(1.55rem,2.4vw,2.05rem);line-height:1.15;margin-top:2.4em;color:var(--ink);scroll-margin-top:110px}
.prose h3{font-size:1.25rem;line-height:1.3;margin-top:1.8em;color:var(--ink);letter-spacing:-.015em}
.prose h2 + *,.prose h3 + *{margin-top:.75em}
.prose ul,.prose ol{padding-left:1.35em}
.prose ul{list-style:disc}.prose ol{list-style:decimal}
.prose li{margin:.4em 0;padding-left:.2em}
.prose li::marker{color:var(--cyan)}
.prose a{color:var(--cyan);text-decoration:underline;text-decoration-color:rgba(0,196,255,.35);text-underline-offset:3px;transition:text-decoration-color 400ms}
.prose a:hover{text-decoration-color:var(--cyan)}
.prose b,.prose strong{color:var(--ink);font-weight:600}
.keypoints{background:linear-gradient(180deg,rgba(0,196,255,.07),rgba(17,24,39,.5));border:1px solid rgba(0,196,255,.22);border-radius:var(--r-md);padding:22px 26px}
.keypoints .kp-h{font-size:11.5px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--cyan);margin-bottom:10px}
.keypoints ul{margin:0}
.callout{border:1px solid rgba(255,107,128,.32);background:rgba(255,46,77,.06);border-radius:var(--r-md);padding:18px 22px;color:#E3CBD1}
.callout b{color:var(--nir-soft)}
.post-fig{margin:2em 0}
.post-fig picture{display:block;border-radius:var(--r-md);overflow:hidden;border:1px solid var(--hair)}
.post-fig img{width:100%;height:auto}
.post-fig figcaption{font-size:.85rem;color:var(--muted);margin-top:10px;line-height:1.5}
.post-faq{margin-top:1.4em}
.post-faq .faq-item summary{font-size:1.05rem}
.post-faq .faq-body p{color:var(--muted)}
.prose .refs{font-size:.86rem;line-height:1.6;color:var(--muted)}
.prose .refs li::marker{color:var(--faint)}
.prose .refs a{word-break:break-word}
.post-disclaimer{font-size:.82rem;color:var(--faint);padding-top:18px;border-top:1px solid var(--hair);margin-top:2em!important}
.related-sec{padding-top:clamp(40px,6vw,72px)}
.related-sec .pc-title{font-size:clamp(1.2rem,1.7vw,1.45rem)}

@media (max-width:899px){
  .post-layout{grid-template-columns:1fr;gap:28px;padding-top:28px}
  .toc{position:static}
  .toc-box{border:1px solid var(--hair);border-radius:var(--r-md);padding:14px 18px;background:rgba(17,24,39,.5)}
  .toc-box summary{margin:0;cursor:pointer;display:flex;justify-content:space-between}
  .toc-box summary::after{content:"+";color:var(--cyan);font-size:16px;line-height:1}
  .toc-box[open] summary{margin-bottom:12px}
  .toc-box[open] summary::after{content:"–"}
  .post-actions{width:100%}
  .post-actions .btn{flex:1 1 auto;justify-content:center}
}

/* ---------- print / PDF ---------- */
@media print{
  @page{size:A4;margin:16mm 16mm 18mm}
  html,body{background:#fff!important;color:#111!important}
  body::before,.nav,.sticky-cta,footer,.read-progress,.crumbs,.post-actions,.toc,.post-cta,.related-sec,.svg-defs{display:none!important}
  *{box-shadow:none!important;text-shadow:none!important}
  .reveal{opacity:1!important;transform:none!important}
  .wrap{width:auto!important;max-width:none!important;margin:0!important}
  .print-brand{display:flex;align-items:center;gap:8pt;max-width:none;font-size:9pt;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:#0090C0;border-bottom:1px solid #ddd;padding-bottom:8pt;margin-bottom:14pt}
  .post-head{padding:0 0 10pt}
  .post-head .kicker{color:#0090C0}
  .post-head h1{font-size:24pt;line-height:1.15;color:#111;max-width:none}
  .post-head h1 em{color:#111}
  .post-head .lede{font-size:12pt;color:#333}
  .post-meta-row{border-top:1px solid #ddd;margin-top:10pt;padding-top:8pt}
  .post-meta,.post-meta a{color:#444!important;border:0}
  .post-hero picture{border:0;border-radius:6pt;break-inside:avoid}
  .post-layout{display:block;padding:12pt 0 0}
  .prose{max-width:none;font-size:10.5pt;line-height:1.55;color:#222}
  .prose .lead-p,.prose h2,.prose h3,.prose b,.prose strong{color:#111}
  .prose h2{font-size:15pt;margin-top:16pt;break-after:avoid}
  .prose h3{font-size:12pt;break-after:avoid}
  .prose a{color:#0070A0;text-decoration:none}
  .prose li::marker{color:#0090C0}
  .keypoints{background:#F2FAFD;border:1px solid #BFE6F5;break-inside:avoid}
  .keypoints .kp-h{color:#0090C0}
  .callout{background:#FFF4F5;border:1px solid #F5C2CA;color:#333;break-inside:avoid}
  .callout b{color:#C0213A}
  .post-fig{break-inside:avoid}
  .post-fig picture{border:0}
  .post-fig img{max-height:90mm;width:auto;max-width:100%;margin:0 auto}
  .post-fig figcaption{color:#555}
  .faq-item{background:#fff!important;border:1px solid #ddd!important;break-inside:avoid}
  .faq-item summary{color:#111}
  .faq-item .plus,.faq-item .n{display:none}
  .faq-item .faq-body p{color:#333}
  .prose .refs{color:#444;font-size:8.5pt}
  .prose .refs a::after{content:" " attr(href);color:#666;word-break:break-all}
  .post-disclaimer{color:#666;border-top:1px solid #ddd}
}

/* ---------- download options inside the article ---------- */
.dl-strip{display:flex;align-items:center;gap:14px;flex-wrap:wrap;padding:14px 18px;border:1px dashed rgba(0,196,255,.35);border-radius:var(--r-md);font-size:.95rem;color:var(--muted);background:rgba(0,196,255,.03)}
.dl-strip > svg{width:20px;height:20px;color:var(--cyan);flex:none}
.dl-strip span{flex:1;min-width:200px}
.dl-strip b{color:var(--ink);font-weight:600}
.prose .dl-strip a{flex:none;font-weight:600;font-size:.9rem;text-decoration:none;color:var(--obsidian);background:var(--cyan);padding:8px 16px;border-radius:999px;transition:box-shadow 500ms var(--ease)}
.prose .dl-strip a:hover{box-shadow:0 0 0 5px rgba(0,196,255,.15)}
.dl-card{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:22px 26px;padding:clamp(20px,3vw,30px);margin-top:2.2em!important;border:1px solid rgba(0,196,255,.28);border-radius:var(--r-lg);background:linear-gradient(135deg,rgba(0,196,255,.09),rgba(17,24,39,.6) 60%);box-shadow:0 30px 70px -40px rgba(0,196,255,.5)}
.dl-doc{position:relative;width:64px;height:80px;border-radius:8px;background:linear-gradient(160deg,#1E293B,#111827);border:1px solid var(--line);display:grid;place-items:end center;padding-bottom:12px}
.dl-doc::before{content:"";position:absolute;top:-1px;right:-1px;width:20px;height:20px;background:linear-gradient(225deg,var(--obsidian) 50%,#27344A 50%);border-radius:0 8px 0 6px}
.dl-doc::after{content:"";position:absolute;left:12px;right:12px;top:18px;height:26px;background:repeating-linear-gradient(180deg,rgba(154,167,186,.35) 0 2px,transparent 2px 7px)}
.dl-doc span{font-size:10px;font-weight:700;letter-spacing:.12em;color:#fff;background:var(--nir);padding:2px 7px;border-radius:4px}
.dl-text .kicker{margin:0 0 6px}
.dl-text h3{margin:0!important;font-size:1.3rem}
.dl-text p{margin:6px 0 0;font-size:.95rem;color:var(--muted)}
.dl-text .dl-facts{font-size:12px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--faint)}
.prose .dl-card .btn{text-decoration:none;color:var(--obsidian)}
.dl-card .btn .ic svg{width:12px;height:12px}
@media (max-width:640px){.dl-card{grid-template-columns:auto 1fr}.dl-card .btn{grid-column:1/-1;justify-content:center}}
@media print{.dl-strip,.dl-card{display:none!important}}

@media print{.print-brand img{width:20pt;height:auto}}