/* =========================================================================
   SHOGOL — Kinetic theme (light + dark)
   Single source of truth for index.html and every /posts/*.html page.
   Light is default; [data-theme="dark"] on <html> flips the palette.
   ========================================================================= */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;700&display=swap');

:root{
  /* light palette (Kinetic LIGHT / #s9) */
  --bg:#f4f5f8;
  --surface:#ffffff;
  --ink:#0a0c12;
  --muted:#4a5466;
  --faint:#7a849c;
  --line:rgba(10,12,18,.14);
  --line-strong:rgba(10,12,18,.30);
  --accent:#2563eb;
  --accent-bright:#2f6bff;
  --accent-soft:rgba(47,107,255,.10);
  --on-accent:#ffffff;
  --code-bg:#0d1018;
  --code-ink:#cdd6e0;
  --shadow:0 24px 60px rgba(10,20,50,.10);
}
[data-theme="dark"]{
  /* dark palette (Kinetic DARK / #s7) */
  --bg:#0a0c12;
  --surface:#11151f;
  --ink:#ffffff;
  --muted:#9aa6c4;
  --faint:#6b7796;
  --line:rgba(255,255,255,.12);
  --line-strong:rgba(255,255,255,.26);
  --accent:#60a5fa;
  --accent-bright:#2f6bff;
  --accent-soft:rgba(47,107,255,.16);
  --on-accent:#ffffff;
  --code-bg:#0d1018;
  --code-ink:#cdd6e0;
  --shadow:0 24px 60px rgba(0,0,0,.5);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:'Space Grotesk',system-ui,sans-serif;
  background:var(--bg);color:var(--ink);
  transition:background .4s ease,color .4s ease;
  overflow-x:hidden;line-height:1.6;
}
::selection{background:var(--accent-bright);color:#fff}
a{color:inherit;text-decoration:none}
.mono{font-family:'JetBrains Mono',monospace}

/* ---- marquee ---------------------------------------------------------- */
.marq{white-space:nowrap;overflow:hidden;background:var(--accent-bright);
  border-top:2px solid var(--accent-bright);border-bottom:2px solid var(--accent-bright)}
.marq .track{display:inline-block;padding:13px 0;animation:marq 26s linear infinite}
.marq span{font-family:'JetBrains Mono';font-size:13px;font-weight:700;letter-spacing:2px;
  color:#fff;text-transform:uppercase;padding:0 18px}
@keyframes marq{to{transform:translateX(-50%)}}
@media(prefers-reduced-motion:reduce){.marq .track{animation:none}}

/* ---- header ----------------------------------------------------------- */
.hdr{max-width:1180px;margin:0 auto;padding:26px 28px;
  display:flex;justify-content:space-between;align-items:center;gap:20px}
.hdr .brand{font-weight:700;font-size:19px;letter-spacing:-.5px}
.hdr .brand b{color:var(--accent)}
.hdr nav{display:flex;gap:24px;align-items:center;font-size:14px;color:var(--muted);font-weight:500}
.hdr nav a{transition:color .2s}
.hdr nav a:hover{color:var(--accent)}

/* theme toggle */
.toggle{width:48px;height:28px;border-radius:999px;border:1px solid var(--line-strong);
  background:var(--surface);position:relative;cursor:pointer;flex:none;transition:.3s}
.toggle::after{content:"";position:absolute;top:2px;left:2px;width:22px;height:22px;border-radius:50%;
  background:var(--accent-bright);transition:.3s cubic-bezier(.5,1.6,.4,.9);
  box-shadow:0 2px 8px rgba(47,107,255,.5)}
[data-theme="dark"] .toggle::after{transform:translateX(20px)}
.toggle svg{position:absolute;top:7px;width:14px;height:14px;pointer-events:none;color:var(--faint)}
.toggle .sun{left:7px}.toggle .moon{right:7px}

/* ---- masthead (loud outline type) ------------------------------------ */
.masthead{max-width:1180px;margin:0 auto;padding:40px 28px 0}
.masthead .meta{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;
  font-family:'JetBrains Mono';font-size:12px;color:var(--faint);letter-spacing:1px;
  border-bottom:1px solid var(--line);padding-bottom:16px;text-transform:uppercase}
.masthead .meta b{color:var(--accent)}
.display{font-weight:700;text-transform:uppercase;line-height:.84;letter-spacing:-4px;
  font-size:clamp(54px,12vw,164px);margin:34px 0}
.display .out{-webkit-text-stroke:2px var(--accent);color:transparent}
.display .fill{color:var(--accent)}
.lede{max-width:560px;font-size:18px;color:var(--muted);line-height:1.6;margin-left:auto}

/* ---- post list (hover-fill rows) ------------------------------------- */
.plist{max-width:1180px;margin:54px auto 0;padding:0 28px 90px}
.plist h2.sec{font-family:'JetBrains Mono';font-size:12px;letter-spacing:3px;color:var(--faint);
  text-transform:uppercase;margin-bottom:6px}
.row{display:grid;grid-template-columns:64px 1fr auto;gap:24px;align-items:center;
  padding:26px 0;border-top:1px solid var(--line);cursor:pointer;transition:.3s}
.row:last-child{border-bottom:1px solid var(--line)}
.row:hover{background:var(--accent-bright);padding-left:18px;padding-right:18px;border-color:transparent}
.row:hover *{color:#fff !important;-webkit-text-stroke:0 !important}
.row .nn{font-family:'JetBrains Mono';font-size:14px;color:var(--accent)}
.row .ttl h3{font-size:clamp(20px,3vw,34px);font-weight:600;letter-spacing:-1px;line-height:1.05;transition:.3s}
.row .ttl p{font-size:14px;color:var(--muted);margin-top:6px;max-width:620px}
.row .side{display:flex;align-items:center;gap:22px}
.row .cat{font-family:'JetBrains Mono';font-size:11px;letter-spacing:1px;color:var(--faint);text-transform:uppercase;white-space:nowrap}
.row .ar{font-size:26px;color:var(--accent);transition:transform .3s}
.row:hover .ar{transform:translateX(6px)}

/* ===== ARTICLE (post pages) =========================================== */
.article{max-width:760px;margin:0 auto;padding:0 28px 40px}
.post-meta{font-family:'JetBrains Mono';font-size:12px;letter-spacing:1px;color:var(--faint);
  text-transform:uppercase;display:flex;flex-wrap:wrap;gap:14px;align-items:center;margin-top:26px}
.post-meta b{color:var(--accent)}
.post-title{font-weight:700;font-size:clamp(38px,7vw,76px);line-height:.92;letter-spacing:-3px;
  text-transform:uppercase;margin:18px 0 10px}
.post-dek{font-size:20px;color:var(--muted);line-height:1.5;max-width:660px;margin-bottom:8px}

.prose{font-size:18px;line-height:1.78;color:var(--ink);margin-top:30px}
.prose > *{max-width:680px}
.prose p{margin:0 0 22px;color:var(--muted)}
.prose strong{color:var(--ink);font-weight:600}
.prose h2{font-size:clamp(26px,4vw,36px);font-weight:700;letter-spacing:-1px;line-height:1.1;
  margin:54px 0 18px;color:var(--ink)}
.prose h2::before{content:"";display:inline-block;width:26px;height:4px;background:var(--accent);
  vertical-align:middle;margin-right:14px;border-radius:2px}
.prose h3{font-size:21px;font-weight:600;margin:34px 0 12px;color:var(--ink)}
.prose a{color:var(--accent);border-bottom:1px solid var(--accent-soft);transition:.2s}
.prose a:hover{border-bottom-color:var(--accent)}
.prose ul,.prose ol{margin:0 0 22px;padding-left:22px;color:var(--muted)}
.prose li{margin:0 0 10px}
.prose li::marker{color:var(--accent)}
.prose blockquote{margin:30px 0;padding:18px 26px;border-left:3px solid var(--accent);
  background:var(--accent-soft);border-radius:0 10px 10px 0;font-size:20px;color:var(--ink)}
.prose blockquote p{color:var(--ink);font-weight:500;margin:0}
.prose hr{border:none;border-top:1px solid var(--line);margin:44px 0}
.prose code{font-family:'JetBrains Mono';font-size:.86em;background:var(--accent-soft);
  color:var(--accent);padding:2px 7px;border-radius:5px}
.prose pre{background:var(--code-bg);color:var(--code-ink);border:1px solid var(--line);
  border-radius:12px;padding:22px 24px;overflow-x:auto;margin:26px 0;font-size:14px;line-height:1.65}
.prose pre code{background:none;color:inherit;padding:0;font-size:14px}

/* key-takeaway / callout */
.callout{border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:0 12px 12px 0;
  background:var(--surface);padding:20px 24px;margin:30px 0;box-shadow:var(--shadow)}
.callout .k{font-family:'JetBrains Mono';font-size:11px;letter-spacing:2px;color:var(--accent);
  text-transform:uppercase;margin-bottom:8px}
.callout p{margin:0;color:var(--ink) !important}

/* ===== DIAGRAMS (bespoke inline SVG) ================================== */
/* Use these classes inside <svg> so diagrams adapt to light/dark.
   Wrap each in <figure class="diagram reveal">. Animate strokes with class="draw". */
.diagram{margin:38px 0;padding:26px;border:1px solid var(--line);border-radius:16px;
  background:var(--surface);box-shadow:var(--shadow);overflow:hidden}
.diagram svg{display:block;width:100%;height:auto;max-width:100%;overflow:visible}
.diagram figcaption{font-family:'JetBrains Mono';font-size:11px;letter-spacing:1px;color:var(--faint);
  text-transform:uppercase;margin-top:16px;text-align:center}
.dgm-box{fill:var(--surface);stroke:var(--line-strong);stroke-width:1.5}
.dgm-box-accent{fill:var(--accent-soft);stroke:var(--accent);stroke-width:1.5}
.dgm-line{stroke:var(--line-strong);stroke-width:1.5;fill:none}
.dgm-flow{stroke:var(--accent);stroke-width:2;fill:none}
.dgm-ink{fill:var(--ink)}
.dgm-muted{fill:var(--muted)}
.dgm-accent{fill:var(--accent)}
.dgm-accent-stroke{stroke:var(--accent);fill:none}
.dgm-label{font-family:'JetBrains Mono';font-size:12px;fill:var(--muted)}
.dgm-title{font-family:'Space Grotesk';font-weight:600;fill:var(--ink)}
/* draw-on animation: give path pathLength="1" + class="draw" */
.draw{stroke-dasharray:1;stroke-dashoffset:1}
.diagram.in .draw{animation:draw 1.1s ease forwards}
.diagram.in .draw.d2{animation-delay:.25s}
.diagram.in .draw.d3{animation-delay:.5s}
.diagram.in .draw.d4{animation-delay:.75s}
.diagram.in .pop{animation:pop .5s ease both}
.diagram.in .pop.d2{animation-delay:.3s}.diagram.in .pop.d3{animation-delay:.5s}
.diagram.in .pop.d4{animation-delay:.7s}.diagram.in .pop.d5{animation-delay:.9s}
@keyframes draw{to{stroke-dashoffset:0}}
@keyframes pop{from{opacity:0;transform:scale(.9)}to{opacity:1;transform:scale(1)}}

/* ===== scroll reveal ================================================== */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1 !important;transform:none !important}
  .draw{stroke-dashoffset:0 !important;animation:none !important}
}

/* ===== prev / next footer ============================================= */
.pn{max-width:760px;margin:60px auto 0;padding:0 28px 90px;display:grid;grid-template-columns:1fr 1fr;gap:16px}
.pn a{border:1px solid var(--line);border-radius:14px;padding:22px;transition:.3s;background:var(--surface)}
.pn a:hover{border-color:var(--accent);transform:translateY(-4px);box-shadow:var(--shadow)}
.pn .k{font-family:'JetBrains Mono';font-size:11px;letter-spacing:1px;color:var(--faint);text-transform:uppercase}
.pn a:last-child{text-align:right}
.pn h4{font-size:18px;font-weight:600;margin-top:8px;line-height:1.2}
.pn .empty{border:1px dashed var(--line);opacity:.4;pointer-events:none}

.backlink{max-width:760px;margin:0 auto;padding:24px 28px 0}
.backlink a{font-family:'JetBrains Mono';font-size:13px;color:var(--accent);letter-spacing:.5px}
.backlink a:hover{text-decoration:underline}

/* ===== footer ========================================================= */
.foot{border-top:1px solid var(--line);margin-top:40px}
.foot .in{max-width:1180px;margin:0 auto;padding:34px 28px;display:flex;justify-content:space-between;
  flex-wrap:wrap;gap:14px;font-family:'JetBrains Mono';font-size:12px;color:var(--faint);letter-spacing:1px}

@media(max-width:720px){
  .hdr nav .lk{display:none}
  .row{grid-template-columns:44px 1fr;gap:14px}
  .row .side{grid-column:2;justify-content:flex-start;margin-top:4px}
  .row .ar{display:none}
  .pn{grid-template-columns:1fr}
  .lede{margin-left:0}
}

/* ===== multi-series: filter chips, feed, series CTA ================== */
.backlink .sep{opacity:.4;margin:0 2px}
.post-meta .date{color:var(--accent)}
.filters{display:flex;flex-wrap:wrap;gap:10px;max-width:1180px;margin:34px auto 0;padding:0 28px}
.chip{font-family:'JetBrains Mono';font-size:12.5px;font-weight:500;color:var(--muted);
  background:var(--surface);border:1px solid var(--line-strong);border-radius:999px;
  padding:9px 18px;cursor:pointer;transition:.25s;letter-spacing:.3px}
.chip:hover{color:var(--accent);border-color:var(--accent)}
.chip.active{background:var(--accent-bright);border-color:var(--accent-bright);color:#fff;
  box-shadow:0 0 22px rgba(47,107,255,.4)}
#series-cta{max-width:1180px;margin:16px auto 0;padding:0 28px;min-height:18px}
.series-cta-link{font-family:'JetBrains Mono';font-size:13px;color:var(--accent);letter-spacing:.5px}
.series-cta-link:hover{text-decoration:underline}
.plist .sec{margin-top:6px}
@keyframes riseIn{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
.row.anim{animation:riseIn .5s ease both}
@media(prefers-reduced-motion:reduce){.row.anim{animation:none}}
