/* ============================================================
   Bytecairn — public design system  (v2 "Signal")
   Technical-editorial. Scannable discovery, calm reading. Light + dark. WCAG AA.
   Original work. Fonts load via <link> in templates/layout.js (not @import) for LCP.
   Type:  Space Grotesk (display/UI) · Newsreader (reading) · JetBrains Mono (meta/code)
   ============================================================ */

:root{
  --bg:#FCFCFB; --surface:#FFFFFF; --surface-2:#F4F4F1; --surface-3:#ECECE8;
  --ink:#15171C; --ink-soft:#474C55; --ink-faint:#666B75;
  --line:rgba(21,23,28,.11); --line-2:rgba(21,23,28,.06);
  --accent:#E8401F; --accent-text:#C5341A; --accent-soft:rgba(232,64,31,.10);
  --teal:#0E7C72; --gold:#9A6B12;
  --display:"Space Grotesk",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --ui:"Space Grotesk",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --read:"Newsreader",Georgia,"Times New Roman",serif;
  --mono:"JetBrains Mono",ui-monospace,"SF Mono",Menlo,monospace;
  --measure:42rem;
  --gutter:clamp(20px,5vw,56px);
  --maxw:1160px;
  --radius:16px;
  --shadow:0 18px 44px -26px rgba(18,20,26,.42);
  --shadow-sm:0 6px 18px -12px rgba(18,20,26,.35);
  --focus:#1f6f8b;
}
:root[data-theme="dark"]{
  --bg:#0D0F12; --surface:#15181D; --surface-2:#1B1F25; --surface-3:#232830;
  --ink:#ECEDF0; --ink-soft:#B4B9C1; --ink-faint:#828893;
  --line:rgba(236,237,240,.13); --line-2:rgba(236,237,240,.06);
  --accent:#FF6A45; --accent-text:#FF855F; --accent-soft:rgba(255,106,69,.14);
  --teal:#3FB6A8; --gold:#D6B05A;
  --shadow:0 22px 50px -28px rgba(0,0,0,.7);
  --shadow-sm:0 8px 20px -12px rgba(0,0,0,.6);
  --focus:#7cc6e2;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme]){
    --bg:#0D0F12; --surface:#15181D; --surface-2:#1B1F25; --surface-3:#232830;
    --ink:#ECEDF0; --ink-soft:#B4B9C1; --ink-faint:#828893;
    --line:rgba(236,237,240,.13); --line-2:rgba(236,237,240,.06);
    --accent:#FF6A45; --accent-text:#FF855F; --accent-soft:rgba(255,106,69,.14);
    --teal:#3FB6A8; --gold:#D6B05A;
    --shadow:0 22px 50px -28px rgba(0,0,0,.7); --shadow-sm:0 8px 20px -12px rgba(0,0,0,.6);
    --focus:#7cc6e2;
  }
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;scroll-padding-top:88px}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
}
body{
  background:var(--bg); color:var(--ink);
  font-family:var(--read); font-size:1.075rem; line-height:1.65;
  -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
  min-height:100vh; transition:background .35s ease,color .35s ease;
}
img{max-width:100%;height:auto;display:block}
::selection{background:var(--accent);color:#fff}
a{color:var(--accent-text);text-decoration:none}
h1,h2,h3,h4{font-family:var(--display);font-weight:600}

/* focus + skip link */
:focus-visible{outline:2.5px solid var(--focus);outline-offset:3px;border-radius:4px}
.skip{position:absolute;left:16px;top:-64px;z-index:200;background:var(--ink);color:var(--bg);
  font-family:var(--ui);font-weight:600;font-size:.9rem;padding:11px 18px;border-radius:0 0 10px 10px;transition:top .2s}
.skip:focus{top:0}

/* ---------- layout ---------- */
.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter)}
.wrap-narrow{max-width:760px}
.eyebrow{font-family:var(--mono);font-weight:600;font-size:.74rem;letter-spacing:.08em;text-transform:uppercase;
  color:var(--accent-text);display:inline-flex;align-items:center;gap:9px}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--accent);display:inline-block;border-radius:2px}
.lede{font-family:var(--read);font-size:1.3rem;line-height:1.55;color:var(--ink-soft)}

/* ---------- header / nav ---------- */
.site-head{position:sticky;top:0;z-index:100;background:color-mix(in srgb,var(--bg) 86%,transparent);
  backdrop-filter:blur(14px) saturate(1.4);border-bottom:1px solid transparent;transition:border-color .3s,background .3s}
.site-head.scrolled{border-bottom-color:var(--line);background:color-mix(in srgb,var(--bg) 94%,transparent)}
.site-head .bar{display:flex;align-items:center;gap:18px;height:66px;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter)}
.brand{font-family:var(--display);font-weight:700;font-size:1.22rem;letter-spacing:-.02em;color:var(--ink);
  display:inline-flex;align-items:center;gap:11px}
.brand .mark{width:22px;height:22px;border-radius:6px;background:var(--accent);position:relative;flex:none;
  transform:rotate(45deg);box-shadow:inset 0 0 0 2px color-mix(in srgb,var(--accent) 60%,#000 0%)}
.brand .mark::after{content:"";position:absolute;inset:6px;border-radius:2px;background:var(--bg)}
.primary-nav{margin-left:auto;display:flex;align-items:center;gap:2px;font-family:var(--ui);font-size:.92rem;font-weight:500}
.primary-nav a{padding:8px 14px;border-radius:9px;color:var(--ink-soft);transition:.18s}
.primary-nav a:hover{color:var(--ink);background:var(--surface-2)}
.primary-nav a[aria-current="page"]{color:var(--ink);font-weight:600;background:var(--surface-2)}
.head-tools{display:flex;align-items:center;gap:8px;margin-left:6px}
.icon-btn{width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:var(--surface);color:var(--ink-soft);
  display:grid;place-items:center;cursor:pointer;transition:.18s}
.icon-btn:hover{color:var(--ink);border-color:var(--ink-faint)}
.icon-btn svg{width:19px;height:19px}
.theme-toggle .moon{display:none}
:root[data-theme="dark"] .theme-toggle .sun{display:none}
:root[data-theme="dark"] .theme-toggle .moon{display:block}
@media (prefers-color-scheme:dark){:root:not([data-theme]) .theme-toggle .sun{display:none}:root:not([data-theme]) .theme-toggle .moon{display:block}}
.nav-toggle{display:none}

@media (max-width:860px){
  .nav-toggle{display:grid}
  .primary-nav{position:fixed;inset:66px 0 auto 0;flex-direction:column;align-items:stretch;gap:3px;
    background:var(--bg);border-bottom:1px solid var(--line);padding:12px var(--gutter) 20px;
    margin:0;box-shadow:var(--shadow);transform:translateY(-12px);opacity:0;pointer-events:none;
    transition:opacity .22s,transform .22s;z-index:99}
  .primary-nav.open{transform:none;opacity:1;pointer-events:auto}
  .primary-nav a{padding:13px 14px;font-size:1.05rem;border-radius:10px}
  .head-tools{margin-left:auto}
}

/* ---------- buttons ---------- */
.btn{font-family:var(--ui);font-weight:600;font-size:.92rem;border:none;cursor:pointer;border-radius:10px;
  display:inline-flex;align-items:center;justify-content:center;gap:9px;transition:.18s;white-space:nowrap;text-align:center}
.btn svg{width:17px;height:17px;flex:none}
.btn-primary{background:var(--ink);color:var(--bg);padding:12px 22px}
.btn-primary:hover{background:var(--accent);color:#fff;transform:translateY(-1px)}
.btn-ghost{border:1px solid var(--line);color:var(--ink);padding:11px 20px;background:transparent}
.btn-ghost:hover{border-color:var(--ink);background:var(--surface-2)}

/* ---------- tags / chips ---------- */
.tag{font-family:var(--mono);font-size:.72rem;font-weight:500;color:var(--ink-soft);background:var(--surface-2);
  border:1px solid var(--line);border-radius:7px;padding:3px 9px;transition:.16s;white-space:nowrap}
.tag::before{content:"#";opacity:.5;margin-right:1px}
a.tag:hover{border-color:var(--accent);color:var(--accent-text);background:var(--accent-soft)}
.tags{display:flex;gap:7px;flex-wrap:wrap}

/* ---------- hero / intro ---------- */
.intro{padding-block:clamp(48px,8vw,92px) clamp(28px,4vw,44px)}
.intro h1{font-family:var(--display);font-weight:700;font-size:clamp(2.3rem,6vw,4.1rem);line-height:1.03;
  letter-spacing:-.035em;max-width:16ch}
.intro h1 em{font-style:normal;color:var(--accent-text)}
.intro .bio{font-family:var(--read);font-size:clamp(1.12rem,2.1vw,1.38rem);line-height:1.5;color:var(--ink-soft);max-width:56ch;margin-top:22px}
.intro .links{display:flex;flex-wrap:wrap;gap:14px;align-items:center;margin-top:28px;font-family:var(--ui)}
.intro .links a.text-link{font-weight:600;font-size:.95rem;color:var(--ink);border-bottom:2px solid var(--accent);padding-bottom:2px}
.intro .links a.text-link:hover{color:var(--accent-text)}
.intro .dot{width:4px;height:4px;border-radius:50%;background:var(--ink-faint)}

/* ---------- section heads ---------- */
.section{padding-block:clamp(28px,5vw,52px)}
.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:20px;flex-wrap:wrap;
  border-bottom:1px solid var(--line);padding-bottom:16px;margin-bottom:30px}
.section-head h2{font-family:var(--display);font-weight:600;font-size:clamp(1.4rem,3vw,1.9rem);letter-spacing:-.025em}
.section-head a{font-family:var(--ui);font-size:.88rem;font-weight:600;color:var(--accent-text)}
.section-head a:hover{text-decoration:underline}

/* ---------- discovery: featured lead ---------- */
.lead{display:grid;grid-template-columns:1.1fr .9fr;border:1px solid var(--line);border-radius:20px;overflow:hidden;
  background:var(--surface);margin-bottom:30px;transition:.2s;position:relative}
.lead:hover{border-color:var(--ink-faint);box-shadow:var(--shadow)}
.lead .art{min-height:280px;position:relative;background:
  radial-gradient(130% 120% at 80% 10%,#FF8A5B,transparent 55%),
  radial-gradient(120% 130% at 10% 95%,#0E7C72,transparent 52%),
  linear-gradient(140deg,#E8401F,#9A2A12 65%,#321a14)}
.lead .art .glyph{position:absolute;right:18px;bottom:14px;font-family:var(--mono);font-size:.74rem;letter-spacing:.1em;
  color:rgba(255,255,255,.7);text-transform:uppercase}
.lead .body{padding:clamp(26px,3.6vw,42px);display:flex;flex-direction:column;justify-content:center}
.lead .body h3{font-family:var(--display);font-weight:600;font-size:clamp(1.6rem,3.2vw,2.4rem);line-height:1.08;letter-spacing:-.03em;margin:14px 0 12px}
.lead .body h3 a{color:var(--ink)}
.lead .body h3 a::after{content:"";position:absolute;inset:0}
.lead .body h3 a:hover{color:var(--accent-text)}
.lead .body .dek{font-family:var(--read);color:var(--ink-soft);font-size:1.08rem;line-height:1.5;max-width:44ch}
.lead .body .meta{font-family:var(--mono);font-size:.74rem;color:var(--ink-faint);margin-top:20px;display:flex;gap:9px;align-items:center;flex-wrap:wrap}
.lead .body .meta .sep{width:3px;height:3px;border-radius:50%;background:var(--ink-faint)}
@media (max-width:760px){.lead{grid-template-columns:1fr}.lead .art{min-height:160px}}

/* ---------- discovery: card grid (dev-feed pattern, our styling) ---------- */
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:22px}
.card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 22px 18px;transition:transform .18s,border-color .18s,box-shadow .18s;position:relative}
.card:hover{border-color:var(--ink-faint);transform:translateY(-3px);box-shadow:var(--shadow-sm)}
.card .cat{font-family:var(--mono);font-size:.7rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--accent-text)}
.card h3{font-family:var(--display);font-weight:600;font-size:1.28rem;line-height:1.18;letter-spacing:-.02em;margin:11px 0 9px}
.card h3 a{color:var(--ink)}
.card h3 a::after{content:"";position:absolute;inset:0}
.card h3 a:hover{color:var(--accent-text)}
.card .dek{font-family:var(--read);color:var(--ink-soft);font-size:1rem;line-height:1.5;flex:1}
.card .meta{display:flex;align-items:center;gap:8px;margin-top:18px;font-family:var(--mono);font-size:.72rem;color:var(--ink-faint)}
.card .meta .sep{width:3px;height:3px;border-radius:50%;background:var(--ink-faint)}
.card .tags{margin-top:14px;position:relative;z-index:1}

/* compact list (used for "more from this archive year") */
.year-band{display:flex;align-items:center;gap:16px;margin:40px 0 22px}
.year-band h2{font-family:var(--display);font-weight:700;font-size:clamp(1.5rem,4vw,2.1rem);letter-spacing:-.03em;color:var(--ink)}
.year-band .rule{flex:1;height:1px;background:var(--line)}
.year-band .n{font-family:var(--mono);font-size:.74rem;color:var(--ink-faint)}

.count{font-family:var(--mono);font-size:.8rem;color:var(--ink-faint)}

/* ---------- article: reading view ---------- */
/* The reading column is ALWAYS centred with equal side margins. On mobile/tablet
   the rail flows inline under the title; on wide screens it floats into the left
   gutter (out of flow) so its width never shifts the centred column. */
.article-shell{max-width:46rem;margin-inline:auto;padding-inline:var(--gutter);position:relative}
.rail-inner{display:contents}
.article-rail{margin:22px 0 30px}
.article-rail .byline{margin-top:0}
.rail-links{display:none}
@media (min-width:1200px){
  /* Wide screens: a centred [rail · reading] grid (balanced margins) instead of
     a skinny rail floated into the gutter. Reading measure (46rem) is unchanged. */
  .article-shell{max-width:1128px;padding-inline:28px;display:grid;grid-template-columns:280px minmax(0,46rem);column-gap:56px}
  .article-head{grid-column:2;grid-row:1}
  .article-main{grid-column:2;grid-row:2}
  .article-rail{grid-column:1;grid-row:1 / 3;margin:0}
  .rail-inner{display:flex;flex-direction:column;gap:24px;position:sticky;top:90px}
  .article-rail .byline{flex-direction:column;align-items:flex-start;gap:13px}
  .article-rail .byline .sep{display:none}
  .article-rail .post-toc{margin:0}
  .rail-links{display:flex;flex-direction:column;gap:9px;padding-top:20px;border-top:1px solid var(--line)}
  .rail-links a{font-family:var(--ui);font-size:.88rem;font-weight:600;color:var(--ink-soft)}
  .rail-links a:hover{color:var(--accent-text)}
}
.article-head{padding-block:clamp(36px,5vw,64px) clamp(20px,3vw,28px);border-bottom:1px solid var(--line);margin-bottom:clamp(28px,4vw,40px)}
.article-head .crumbs{font-family:var(--mono);font-size:.74rem;letter-spacing:.04em;text-transform:uppercase;color:var(--accent-text);font-weight:600;margin-bottom:18px}
.article-head .crumbs a{color:var(--accent-text)}
.article-head h1{font-family:var(--display);font-weight:700;font-size:clamp(2rem,4.4vw,3.1rem);line-height:1.06;letter-spacing:-.035em}
.article-head .standfirst{font-family:var(--read);font-size:clamp(1.16rem,2.1vw,1.36rem);line-height:1.46;color:var(--ink-soft);margin-top:18px;max-width:50ch}
.byline{display:flex;align-items:center;gap:13px;margin-top:26px;font-family:var(--ui)}
.byline .av{position:relative;width:42px;height:42px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--gold));display:grid;place-items:center;color:#fff;font-family:var(--display);font-weight:700;font-size:1.05rem;flex:none;overflow:hidden}
.av .av-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;border-radius:50%}
.byline .who{font-size:.9rem}
.byline .who b{display:block;color:var(--ink);font-weight:600}
.byline .who span{color:var(--ink-faint);font-family:var(--mono);font-size:.76rem}
.byline .sep{width:1px;height:30px;background:var(--line)}
.byline .meta{font-family:var(--mono);font-size:.76rem;color:var(--ink-faint);line-height:1.55}

.post-toc{border:1px solid var(--line);border-radius:14px;background:var(--surface-2);padding:18px 22px;margin:0 0 clamp(26px,4vw,38px);font-family:var(--ui)}
.post-toc h2{font-family:var(--mono);font-size:.7rem;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-faint);font-weight:600;margin:0 0 10px}
.post-toc ol{margin:0;padding-left:1.2em;display:flex;flex-direction:column;gap:5px;counter-reset:toc}
.post-toc li{font-size:.94rem}
.post-toc li::marker{color:var(--accent);font-family:var(--mono);font-size:.8rem}
.post-toc a{color:var(--ink-soft)}
.post-toc a:hover{color:var(--accent-text);text-decoration:underline}

.lead-fig{margin:0 0 clamp(26px,4vw,38px)}
.lead-fig img{width:100%;border-radius:16px;aspect-ratio:16/9;object-fit:cover;display:block}

/* ---------- prose (article / about / legal) ---------- */
.prose{font-family:var(--read);font-size:1.2rem;line-height:1.75;color:var(--ink)}
.prose > *{max-width:var(--measure);margin-inline:auto}
.prose p{margin-bottom:1.45em}
.prose .first::first-letter{font-family:var(--display);font-weight:700;font-size:3.6em;float:left;line-height:.78;padding:6px 12px 0 0;color:var(--accent-text)}
.prose h2{font-family:var(--display);font-weight:600;font-size:clamp(1.5rem,3.2vw,2rem);line-height:1.15;letter-spacing:-.03em;margin:1.8em auto .5em}
.prose h3{font-family:var(--display);font-weight:600;font-size:1.34rem;letter-spacing:-.02em;margin:1.5em auto .4em}
.prose a:not(.btn){color:var(--accent-text);border-bottom:1px solid color-mix(in srgb,var(--accent) 38%,transparent);transition:.18s}
.prose a:not(.btn):hover{background:var(--accent-soft)}
.prose strong{font-weight:600;color:var(--ink)}
.prose em{font-style:italic}
.prose ul,.prose ol{padding-left:1.3em;margin-bottom:1.45em}
.prose li{margin-bottom:.5em}
.prose li::marker{color:var(--accent)}
.prose blockquote{font-family:var(--read);font-weight:400;font-style:italic;font-size:1.4rem;line-height:1.45;
  padding:.2em 0 .2em 26px;margin:1.4em auto;position:relative;color:var(--ink-soft)}
.prose blockquote::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;background:var(--accent);border-radius:3px}
.prose hr{border:none;text-align:center;margin:2.3em auto;max-width:200px}
.prose hr::before{content:"· · ·";color:var(--ink-faint);font-family:var(--mono);letter-spacing:.3em}
.prose .callout{background:var(--surface-2);border:1px solid var(--line);border-left:3px solid var(--teal);
  border-radius:0 12px 12px 0;padding:18px 22px;font-size:1.04rem;color:var(--ink-soft);margin:1.6em auto}
.prose .callout b{font-family:var(--mono);font-weight:600;font-size:.7rem;letter-spacing:.06em;text-transform:uppercase;color:var(--teal);display:block;margin-bottom:7px}
.prose figure{margin:2em auto}
.prose figure img,.prose figure .ph{border-radius:14px}
.prose figcaption{font-family:var(--mono);font-size:.78rem;color:var(--ink-faint);text-align:center;margin-top:11px}
/* table */
.prose .table-wrap{margin:1.8em auto;overflow-x:auto;border:1px solid var(--line);border-radius:12px}
.prose table{width:100%;border-collapse:collapse;font-size:.96rem}
.prose thead th{text-align:left;font-family:var(--display);font-weight:600;font-size:.92rem;background:var(--surface-2);padding:11px 14px;border-bottom:1px solid var(--line)}
.prose tbody td{padding:11px 14px;border-bottom:1px solid var(--line-2)}
.prose tbody tr:last-child td{border-bottom:none}
/* video / embed */
.prose figure.embed{margin:2em auto}
.prose .embed-frame{position:relative;width:100%;aspect-ratio:16/9;border-radius:14px;overflow:hidden;background:#000}
.prose .embed-frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
/* accordion */
.prose details{border:1px solid var(--line);border-radius:12px;padding:4px 16px;margin:1.5em auto;background:var(--surface-2)}
.prose details summary{cursor:pointer;font-family:var(--display);font-weight:600;padding:11px 0;list-style:none}
.prose details summary::-webkit-details-marker{display:none}
.prose details summary::before{content:"▸";display:inline-block;margin-right:10px;color:var(--accent-text);transition:transform .2s}
.prose details[open] summary::before{transform:rotate(90deg)}
.prose details .details-body{padding:2px 0 14px}
/* CTA button */
.prose .cta-wrap{text-align:center;margin:2em auto}
.prose a.btn-cta{display:inline-block;background:var(--accent);color:#fff;font-family:var(--ui,inherit);font-weight:600;font-size:.95rem;
  padding:12px 26px;border-radius:10px;text-decoration:none;border:none;transition:.18s}
.prose a.btn-cta:hover{filter:brightness(1.08);background:var(--accent)}
.prose code{font-family:var(--mono);font-size:.86em;background:var(--surface-3);padding:.12em .4em;border-radius:5px}
.prose pre{position:relative;background:#16191F;color:#E5E7EB;border-radius:14px;padding:20px 22px;overflow:auto;
  font-family:var(--mono);font-size:.88rem;line-height:1.65;margin:1.5em auto;border:1px solid rgba(255,255,255,.06)}
.prose pre code{background:none;padding:0;color:inherit;font-size:1em}
.prose pre .copy-btn{position:absolute;top:10px;right:10px;font-family:var(--mono);font-size:.68rem;letter-spacing:.04em;
  text-transform:uppercase;color:#9AA4B2;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);
  border-radius:7px;padding:5px 9px;cursor:pointer;opacity:0;transition:.15s}
.prose pre:hover .copy-btn,.prose pre .copy-btn:focus-visible{opacity:1}
.prose pre .copy-btn:hover{color:#E5E7EB;background:rgba(255,255,255,.12)}
.prose pre .copy-btn.copied{color:#9ECE6A;border-color:rgba(158,206,106,.4)}
@media (hover:none){.prose pre .copy-btn{opacity:1}}
/* syntax tokens (src/lib/highlight.js) */
.prose pre .tok-c{color:#7E8896;font-style:italic}
.prose pre .tok-s{color:#9ECE6A}
.prose pre .tok-n{color:#7AA2F7}
.prose pre .tok-k{color:#FF9E64}

/* pull quote (breaks measure) */
.pull{max-width:48rem!important;text-align:center;font-family:var(--display);font-weight:600;font-size:clamp(1.5rem,3.6vw,2.3rem);
  line-height:1.15;letter-spacing:-.03em;color:var(--ink);margin:1.5em auto;padding:0 12px}
.pull em{font-style:normal;color:var(--accent-text)}

/* body fills the reading shell (overrides centered .prose) */
.article-body{font-size:1.2rem;line-height:1.78}
.article-body.prose > *{max-width:none;margin-inline:0}
.article-body.prose .pull{max-width:none!important}
.article-body.prose hr{text-align:left}
.article-body .tags{margin-top:2.4em}

.endcard{margin-top:50px;background:var(--surface-2);border:1px solid var(--line);border-radius:16px;padding:26px;display:flex;gap:20px;align-items:flex-start}
.endcard .av{position:relative;width:54px;height:54px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--gold));display:grid;place-items:center;color:#fff;font-family:var(--display);font-weight:700;font-size:1.35rem;flex:none;overflow:hidden}
.endcard h2{font-family:var(--display);font-weight:600;font-size:1.2rem;margin-bottom:6px}
.endcard p{font-family:var(--read);font-size:1rem;color:var(--ink-soft);line-height:1.55}
.endcard .links{margin-top:12px;display:flex;gap:16px;font-family:var(--ui);font-size:.9rem;font-weight:600}
.related{margin-top:46px;padding-top:26px;border-top:1px solid var(--line)}
.related h2{font-family:var(--display);font-weight:600;font-size:1.25rem;letter-spacing:-.02em;margin-bottom:14px}
.related ul{list-style:none;padding:0;margin:0;display:grid;gap:2px}
.related li a{display:block;padding:14px 0;border-bottom:1px solid var(--line-2);font-family:var(--display);font-weight:500;font-size:1.12rem;letter-spacing:-.01em;color:var(--ink);transition:.18s}
.related li a:hover{color:var(--accent-text)}
.related .rc{display:block;font-family:var(--mono);font-size:.68rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--accent-text);margin-bottom:4px}

/* reading progress */
.progress{position:fixed;top:0;left:0;height:3px;background:var(--accent);width:0;z-index:120;transition:width .1s linear}

/* ---------- legal / doc page ---------- */
.doc{display:grid;grid-template-columns:220px 1fr;gap:54px;align-items:start;padding-top:18px}
.doc .toc{position:sticky;top:92px;font-family:var(--ui);font-size:.88rem}
.doc .toc h2{font-family:var(--mono);font-size:.7rem;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-faint);font-weight:600;margin-bottom:14px}
.doc .toc a{display:block;color:var(--ink-soft);padding:6px 0;border-left:2px solid var(--line);padding-left:14px;transition:.16s}
.doc .toc a:hover,.doc .toc a.active{color:var(--accent-text);border-left-color:var(--accent)}
.doc .doc-body{max-width:46rem}
.doc .doc-body > *{max-width:none;margin-inline:0}
.updated{font-family:var(--mono);font-size:.8rem;color:var(--ink-faint);background:var(--surface-2);border:1px solid var(--line);border-radius:9px;padding:9px 15px;display:inline-block;margin-bottom:28px}
@media (max-width:820px){.doc{grid-template-columns:1fr;gap:22px}.doc .toc{position:static;border:1px solid var(--line);border-radius:14px;padding:18px 20px;background:var(--surface-2)}.doc .toc a{border-left:none;padding-left:0}}

/* ---------- contact form ---------- */
.two-col{display:grid;grid-template-columns:1fr 320px;gap:54px;align-items:start}
@media (max-width:860px){.two-col{grid-template-columns:1fr;gap:34px}}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:7px;margin-bottom:18px}
.field.full{grid-column:1/-1}
.field label{font-family:var(--ui);font-weight:600;font-size:.9rem;color:var(--ink)}
.field label .req{color:var(--accent-text)}
.field .hint{font-family:var(--ui);font-size:.8rem;color:var(--ink-faint)}
.field input,.field textarea,.field select{font-family:var(--ui);font-size:1rem;padding:12px 15px;border-radius:10px;
  border:1px solid var(--line);background:var(--surface);color:var(--ink);width:100%;transition:.16s}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.field textarea{resize:vertical;min-height:140px;line-height:1.6}
.contact-aside{font-family:var(--ui)}
.contact-aside .row{display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--line-2)}
.contact-aside .row .ic{width:38px;height:38px;border-radius:10px;background:var(--surface-2);border:1px solid var(--line);display:grid;place-items:center;color:var(--accent-text);flex:none}
.contact-aside .row .ic svg{width:18px;height:18px}
.contact-aside .row b{display:block;font-weight:600;font-size:.95rem;color:var(--ink)}
.contact-aside .row span{font-size:.88rem;color:var(--ink-soft)}
.form-status{font-family:var(--ui);font-size:.92rem;padding:12px 16px;border-radius:10px;margin-bottom:18px;display:none}
.form-status.ok{display:block;background:color-mix(in srgb,var(--teal) 16%,transparent);color:var(--teal);border:1px solid var(--teal)}
.form-status.err{display:block;background:var(--accent-soft);color:var(--accent-text);border:1px solid var(--accent)}
@media (max-width:680px){.form-grid{grid-template-columns:1fr}}

/* portrait (about) */
.portrait{width:100%;aspect-ratio:4/5;border-radius:18px;background:
  radial-gradient(120% 120% at 70% 20%,#FF8A5B,transparent 55%),
  linear-gradient(150deg,#E8401F,#0E7C72);position:relative;overflow:hidden;box-shadow:var(--shadow)}

/* ---------- footer ---------- */
.site-foot{border-top:1px solid var(--line);margin-top:clamp(56px,8vw,104px);padding:clamp(42px,6vw,60px) 0 42px}
.foot-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:32px}
.foot-about p{font-family:var(--read);color:var(--ink-soft);font-size:1rem;max-width:34ch;margin-top:14px}
.foot-col h3{font-family:var(--mono);font-size:.7rem;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-faint);font-weight:600;margin-bottom:15px}
.foot-col a{display:block;font-family:var(--ui);font-size:.93rem;color:var(--ink-soft);margin-bottom:11px;transition:.16s}
.foot-col a:hover{color:var(--accent-text)}
.foot-bottom{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
  margin-top:44px;padding-top:24px;border-top:1px solid var(--line);font-family:var(--mono);font-size:.78rem;color:var(--ink-faint)}
.foot-bottom a{color:var(--ink-soft)}
@media (max-width:760px){.foot-grid{grid-template-columns:1fr 1fr}.foot-about{grid-column:1/-1}}
@media (max-width:440px){.foot-grid{grid-template-columns:1fr}}

/* ---------- 404 ---------- */
.notfound{min-height:60vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:60px 0}
.notfound .big{font-family:var(--display);font-weight:700;font-size:clamp(5rem,18vw,11rem);line-height:.9;letter-spacing:-.05em;color:var(--accent-text)}
.notfound h1{font-family:var(--display);font-weight:600;font-size:clamp(1.6rem,4vw,2.3rem);margin:8px 0 14px;letter-spacing:-.03em}
.notfound p{font-family:var(--read);color:var(--ink-soft);max-width:42ch;margin:0 auto 28px}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .7s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none}}

/* ---- comments ---- */
.comments{max-width:var(--measure);margin:3em auto 0;padding-top:2em;border-top:1px solid var(--line)}
.comments > h2{font-family:var(--display);font-size:1.5rem;margin-bottom:1.1em}
.comment-list{list-style:none;padding:0;margin:0 0 2em}
.comment{display:flex;gap:12px;margin:0 0 1.4em}
.c-avatar{width:40px;height:40px;border-radius:50%;flex:none;background:var(--surface-3)}
.c-main{flex:1;min-width:0}
.c-head{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.c-head b{font-weight:600}
.c-head time{font-size:.78rem;color:var(--ink-faint)}
.c-body{margin:.3em 0;line-height:1.6;white-space:pre-wrap;word-break:break-word}
.c-reply{background:none;border:none;color:var(--accent-text);font-size:.82rem;font-weight:600;cursor:pointer;padding:0}
.c-reply:hover{text-decoration:underline}
.c-replies{list-style:none;margin:1.1em 0 0;padding:0 0 0 10px;border-left:2px solid var(--line)}
.c-replies .comment{margin-top:1.2em}
.comment-empty{color:var(--ink-faint);font-style:italic}
.comment-form{background:var(--surface-2);border:1px solid var(--line);border-radius:14px;padding:18px}
.comment-form-title{font-family:var(--display);font-size:1.1rem;margin-bottom:10px}
.comment-fields{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:10px}
.comment-form input,.comment-form textarea{width:100%;border:1px solid var(--line);border-radius:9px;padding:10px 12px;font-family:inherit;font-size:.95rem;background:var(--surface);color:var(--ink)}
.comment-form textarea{margin-bottom:10px;resize:vertical}
.comment-form input:focus,.comment-form textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.reply-to{font-size:.85rem;color:var(--ink-soft);margin-bottom:10px}
.reply-to button{background:none;border:none;color:var(--accent-text);cursor:pointer;font-size:.85rem;text-decoration:underline}
@media (max-width:560px){.comment-fields{grid-template-columns:1fr}}

/* draft preview banner */
.preview-banner{background:var(--gold);color:#fff;text-align:center;font-family:var(--ui);font-weight:600;
  font-size:.88rem;padding:10px 16px;position:sticky;top:0;z-index:90}

/* archive pagination */
.pager{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:3em auto 0;max-width:var(--measure)}
.pager .pg{font-family:var(--ui);font-weight:600;font-size:.9rem;padding:9px 16px;border:1px solid var(--line);border-radius:10px;color:var(--ink);text-decoration:none}
.pager .pg:hover{border-color:var(--ink);background:var(--surface-2)}
.pager .pg.disabled{color:var(--ink-faint);border-color:var(--line-2);pointer-events:none}
.pager .pg-mid{font-family:var(--mono);font-size:.8rem;color:var(--ink-faint)}

/* search */
.search-form{display:flex;gap:10px;margin-top:18px;max-width:var(--measure)}
.search-form input[type="search"]{flex:1;border:1px solid var(--line);background:var(--surface);color:var(--ink);
  border-radius:11px;padding:12px 15px;font-family:var(--ui);font-size:1rem;outline:none}
.search-form input[type="search"]:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}

/* diagrams / charts / math (lazy-rendered client-side) */
.prose pre.mermaid{background:none;color:inherit;border:none;padding:0;margin:1.8em auto;font-family:inherit;text-align:center;overflow-x:auto}
.prose pre.mermaid svg{max-width:100%;height:auto}
.prose .chart-block{max-width:var(--measure);margin:1.8em auto}
.prose .chart-block canvas{max-width:100%}
.prose .chart-block.err{color:var(--accent-text);font-family:var(--mono);font-size:.85rem}
.prose .math-block{margin:1.4em auto;text-align:center;overflow-x:auto;overflow-y:hidden}