/* ============================================================
   ARTICLE PAGES — shared screen + print (PDF) styles
   Used by every articles/<slug>.html page.
   ============================================================ */
:root{
  --bg:#FFFFFF;
  --text:#171717;
  --muted:#4F4B45;
  --faint:#8A8378;
  --border:#E8E2D8;
  --border-strong:#CFC4B6;
  --soft:#FAF8F4;
  --accent:#7A4E21;
  --code-bg:#F6F3EE;
  --focus:#7A4E21;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:24px}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
a{color:inherit}
::selection{background:var(--accent);color:#fff}
:focus-visible{outline:2px solid var(--focus);outline-offset:3px;border-radius:4px}

.progress{position:fixed;top:0;left:0;height:2px;width:0;background:var(--accent);z-index:50;transition:width .08s linear}
.wrap{max-width:760px;margin:0 auto;padding:28px 24px 80px}

/* ---------- top bar ---------- */
.topbar{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:48px;font-size:13px}
.topbar a{color:var(--muted);text-decoration:none}
.topbar a:hover{color:var(--text)}
.topbar .brand{font-weight:600;color:var(--text)}
.topbar nav{display:flex;gap:18px}

/* ---------- header ---------- */
.a-header{margin-bottom:28px}
.eyebrow{font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin:0 0 12px}
.eyebrow a{text-decoration:none}
.a-title{font-size:clamp(30px,5.2vw,44px);line-height:1.1;letter-spacing:-.035em;margin:0 0 14px;font-weight:700}
.a-subtitle{font-family:"Source Serif 4",Georgia,serif;font-size:20px;line-height:1.5;color:var(--muted);margin:0 0 26px;max-width:62ch}

.byline{display:flex;align-items:center;gap:12px;padding:16px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.avatar{width:40px;height:40px;border-radius:50%;background:var(--text);color:#fff;display:grid;place-items:center;font-size:13px;font-weight:600;letter-spacing:.02em;flex:none}
.byline-main{display:flex;flex-direction:column;line-height:1.35;min-width:0}
.byline-name{font-weight:600;font-size:14.5px;text-decoration:none}
.byline-name:hover{color:var(--accent)}
.byline-sub{font-size:13px;color:var(--faint);display:flex;flex-wrap:wrap}
.byline-sub span+span::before{content:"·";margin:0 7px}
.byline-actions{margin-left:auto;display:flex;gap:6px}

.tags{display:flex;flex-wrap:wrap;gap:6px;margin:16px 0 0;padding:0;list-style:none}
.tag{display:inline-block;font-size:12px;color:var(--muted);border:1px solid var(--border);border-radius:999px;padding:3px 10px;text-decoration:none;background:#fff}
a.tag:hover{color:var(--accent);border-color:var(--border-strong)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:6px;font:inherit;font-size:12.5px;font-weight:500;padding:7px 11px;border-radius:8px;border:1px solid var(--border);background:#fff;color:var(--muted);text-decoration:none;cursor:pointer;white-space:nowrap}
.btn:hover{color:var(--text);border-color:var(--border-strong)}
.btn svg{width:14px;height:14px;flex:none}
.btn-primary{background:var(--text);color:#fff;border-color:var(--text)}
.btn-primary:hover{background:var(--accent);border-color:var(--accent);color:#fff}

/* ---------- table of contents ---------- */
.toc{margin:28px 0 0;padding:16px 18px;border:1px solid var(--border);border-radius:10px;background:var(--soft);font-size:14px}
.toc h2{font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--faint);margin:0 0 8px}
.toc ol{margin:0;padding-left:20px}
.toc li{margin:3px 0}
.toc a{color:var(--muted);text-decoration:none}
.toc a:hover{color:var(--accent)}

/* ---------- body ---------- */
.a-body{font-family:"Source Serif 4",Georgia,serif;font-size:19px;line-height:1.8;margin-top:36px}
.a-body>*:first-child{margin-top:0}
.a-body h2,.a-body h3{font-family:Inter,system-ui,sans-serif;letter-spacing:-.022em;line-height:1.3}
.a-body h2{font-size:24px;margin:44px 0 12px}
.a-body h3{font-size:19px;margin:32px 0 8px}
.a-body p{margin:0 0 20px}
.a-body ul,.a-body ol{margin:0 0 22px;padding-left:24px}
.a-body li{margin-bottom:8px}
.a-body a{color:var(--accent);text-underline-offset:3px}
.a-body blockquote{margin:24px 0;padding:2px 0 2px 20px;border-left:3px solid var(--accent);color:var(--muted);font-style:italic}
.a-body code{font-family:ui-monospace,"Cascadia Code",Consolas,monospace;font-size:.84em;background:var(--code-bg);padding:.12em .36em;border-radius:4px}
.a-body pre{font-size:14px;line-height:1.6;background:var(--code-bg);border:1px solid var(--border);border-radius:8px;padding:16px 18px;overflow-x:auto;margin:0 0 22px}
.a-body pre code{background:none;padding:0;font-size:inherit}
.a-body figure{margin:28px 0}
.a-body img{max-width:100%;height:auto;border-radius:6px}
.a-body figcaption{font-family:Inter,system-ui,sans-serif;font-size:13px;color:var(--faint);margin-top:8px;text-align:center}
.a-body table{width:100%;border-collapse:collapse;font-family:Inter,system-ui,sans-serif;font-size:14.5px;margin:0 0 24px}
.a-body th,.a-body td{border-bottom:1px solid var(--border);padding:8px 10px;text-align:left;vertical-align:top}
.a-body th{font-weight:600;border-bottom-color:var(--border-strong)}
.a-body hr{border:none;border-top:1px solid var(--border);margin:36px 0}
.callout{font-family:Inter,system-ui,sans-serif;font-size:15px;line-height:1.65;background:var(--soft);border:1px solid var(--border);border-left:3px solid var(--accent);border-radius:8px;padding:14px 16px;margin:0 0 22px}
.math-block{overflow-x:auto;margin:22px 0}
.a-body mjx-container[display="true"]{margin:22px 0!important;overflow-x:auto;overflow-y:hidden}

/* ---------- end matter ---------- */
.endmatter{margin-top:56px;border-top:1px solid var(--border);padding-top:8px}
.end-section{padding:22px 0;border-bottom:1px solid var(--border)}
.end-section h2{font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--faint);margin:0 0 14px}

.share-row{display:flex;flex-wrap:wrap;gap:6px}
.share-note{font-size:12px;color:var(--faint);min-height:18px;margin-top:8px}

.timeline{list-style:none;margin:0;padding:0;position:relative}
.timeline li{position:relative;padding:0 0 14px 22px;font-size:14px;color:var(--muted)}
.timeline li:last-child{padding-bottom:0}
.timeline li::before{content:"";position:absolute;left:4px;top:8px;width:7px;height:7px;border-radius:50%;background:var(--border-strong)}
.timeline li:first-child::before{background:var(--accent)}
.timeline li:not(:last-child)::after{content:"";position:absolute;left:7px;top:17px;bottom:0;width:1px;background:var(--border)}
.timeline time{font-weight:600;color:var(--text);font-variant-numeric:tabular-nums;margin-right:8px}

.cite{font-family:ui-monospace,"Cascadia Code",Consolas,monospace;font-size:12.5px;line-height:1.6;background:var(--soft);border:1px solid var(--border);border-radius:8px;padding:12px 14px;margin:0 0 10px;color:var(--muted);word-break:break-word}

.author-card{display:flex;gap:14px;align-items:flex-start}
.author-card p{margin:2px 0 8px;font-size:14px;color:var(--muted)}
.author-card .links{display:flex;gap:14px;flex-wrap:wrap;font-size:13px}
.author-card .links a{color:var(--muted);text-decoration:none}
.author-card .links a:hover{color:var(--accent)}

.more{display:grid;gap:10px}
.more a{display:block;text-decoration:none;padding:14px 16px;border:1px solid var(--border);border-radius:10px}
.more a:hover{border-color:var(--border-strong)}
.more strong{display:block;font-size:15px;margin-bottom:2px}
.more span{font-size:13px;color:var(--faint)}

.footer-sitemap{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;margin-top:56px;padding-top:28px;border-top:1px solid var(--border)}
.footer-sitemap h2{font-family:Inter,system-ui,sans-serif;font-size:11px;font-weight:650;letter-spacing:.08em;text-transform:uppercase;color:var(--faint);margin:0 0 10px}
.footer-sitemap ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px}
.footer-sitemap a{font-size:13px;color:var(--muted);text-decoration:none}
.footer-sitemap a:hover{color:var(--accent)}
@media (max-width:640px){.footer-sitemap{grid-template-columns:repeat(2,minmax(0,1fr))}}
.site-foot{margin-top:28px;font-size:12.5px;color:var(--faint);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
.site-foot a{color:var(--faint)}

/* print-only blocks hidden on screen */
.print-only,.print-table{display:none}

@media (max-width:640px){
  .wrap{padding:20px 16px 64px}
  .topbar{margin-bottom:32px}
  .topbar nav{gap:12px}
  .a-subtitle{font-size:18px}
  .a-body{font-size:18px}
  .byline{flex-wrap:wrap}
  .byline-actions{margin-left:0;width:100%}
}

/* ============================================================
   PRINT / PDF
   Running headers and footers use CSS page-margin boxes
   (Chrome / Edge 131+). article.js injects the per-article
   title and URL into these rules at load time.
   ============================================================ */
@page{
  size:A4;
  margin:22mm 18mm 20mm 18mm;
  @top-left{content:"Ishan Rahul Surdi";font:500 8pt Inter,Arial,sans-serif;color:#8A8378;vertical-align:bottom;padding-bottom:4mm;border-bottom:.5pt solid #E8E2D8}
  @top-right{font:400 8pt Inter,Arial,sans-serif;color:#8A8378;vertical-align:bottom;padding-bottom:4mm;border-bottom:.5pt solid #E8E2D8}
  @bottom-left{font:400 7.5pt Inter,Arial,sans-serif;color:#8A8378;vertical-align:top;padding-top:4mm;border-top:.5pt solid #E8E2D8}
  @bottom-right{content:"Page " counter(page) " of " counter(pages);font:500 7.5pt Inter,Arial,sans-serif;color:#8A8378;vertical-align:top;padding-top:4mm;border-top:.5pt solid #E8E2D8}
}
@page :first{
  @top-left{content:none;border:none}
  @top-right{content:none;border:none}
}

@media print{
  html,body{background:#fff}
  body{font-size:10.5pt;line-height:1.55;color:#111;-webkit-print-color-adjust:exact;print-color-adjust:exact}
  .wrap{max-width:none;padding:0}
  .progress,.topbar,.byline-actions,.toc,.share-section,.more-section,.site-foot,.footer-sitemap,.share-note,.no-print{display:none!important}
  .print-only{display:block}
  .print-table{display:table}

  /* letterhead on page 1 */
  .letterhead{display:flex;justify-content:space-between;align-items:flex-end;padding-bottom:9pt;margin-bottom:22pt;border-bottom:1.5pt solid #171717}
  .lh-name{font-size:15pt;font-weight:700;letter-spacing:-.02em;line-height:1.1}
  .lh-role{font-size:8.5pt;color:#4F4B45;margin-top:3pt}
  .lh-contact{text-align:right;font-size:8pt;line-height:1.5;color:#4F4B45}
  .lh-contact a{text-decoration:none}

  .a-header{margin-bottom:16pt}
  .eyebrow{font-size:7.5pt;margin-bottom:6pt}
  .eyebrow a{text-decoration:none}
  .a-title{font-size:23pt;line-height:1.15;margin-bottom:6pt}
  .a-subtitle{font-size:12.5pt;margin-bottom:12pt}
  .byline{display:none}
  .tags{display:none}

  /* metadata table */
  .meta-table{width:100%;border-collapse:collapse;font-size:8.5pt;margin:0 0 4pt;border-top:.75pt solid #CFC4B6;border-bottom:.75pt solid #CFC4B6}
  .meta-table th{width:24mm;text-align:left;font-weight:600;color:#4F4B45;padding:3.5pt 8pt 3.5pt 0;vertical-align:top;text-transform:uppercase;font-size:7pt;letter-spacing:.08em}
  .meta-table td{padding:3.5pt 0;vertical-align:top;color:#171717}
  .meta-table tr+tr th,.meta-table tr+tr td{border-top:.5pt solid #EFEAE2}
  .meta-table a{text-decoration:none}

  .a-body{font-size:11pt;line-height:1.6;margin-top:18pt}
  .a-body h2{font-size:14pt;margin:20pt 0 6pt;break-after:avoid;page-break-after:avoid}
  .a-body h3{font-size:12pt;margin:14pt 0 5pt;break-after:avoid;page-break-after:avoid}
  .a-body p{margin:0 0 8pt;orphans:3;widows:3}
  .a-body li{margin-bottom:3pt}
  .a-body a{color:#171717;text-decoration:underline;text-decoration-color:#CFC4B6}
  .a-body pre,.a-body figure,.a-body table,.a-body blockquote,.callout,.math-block,.a-body mjx-container{break-inside:avoid;page-break-inside:avoid}
  .a-body pre{font-size:8.5pt;white-space:pre-wrap;word-break:break-word}
  .a-body img{max-height:120mm}

  .endmatter{margin-top:22pt;padding-top:0;border-top:1pt solid #171717;break-inside:auto}
  .end-section{padding:10pt 0;break-inside:avoid;page-break-inside:avoid}
  .end-section h2{font-size:7.5pt;margin-bottom:6pt}
  .timeline li{font-size:9pt;padding-bottom:4pt}
  .timeline li::after{display:none}
  .cite{font-size:8.5pt;background:#fff;padding:6pt 8pt}
  .author-card .avatar{width:28pt;height:28pt;font-size:9pt}
  .author-card p{font-size:9pt}
  .author-card .links{font-size:8.5pt}
  .print-legal{font-size:7.5pt;color:#8A8378;margin-top:12pt;line-height:1.5}
}