:root {
  --hue: 53;
  --bg:        oklch(0.962 0.022 var(--hue));
  --bg-2:      oklch(0.945 0.028 var(--hue));
  --ink:       oklch(0.22 0.020 var(--hue));
  --ink-soft:  oklch(0.42 0.018 var(--hue));
  --ink-mute:  oklch(0.58 0.015 var(--hue));
  --rule:      oklch(0.86 0.025 var(--hue));
  --accent:    oklch(0.55 0.16 var(--hue));
  --accent-soft: oklch(0.55 0.16 var(--hue) / 0.10);
  --code-bg:   oklch(0.92 0.020 var(--hue));
  --quote-bar: oklch(0.55 0.16 var(--hue));

  --font-sans: "IBM Plex Sans", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;

  --measure: 64ch;
  --gutter: clamp(20px, 5vw, 48px);
}
:root[data-theme="dark"] {
  --bg:        oklch(0.215 0.012 50);
  --bg-2:      oklch(0.255 0.014 50);
  --ink:       oklch(0.93 0.015 70);
  --ink-soft:  oklch(0.78 0.018 65);
  --ink-mute:  oklch(0.60 0.018 60);
  --rule:      oklch(0.34 0.018 55);
  --accent:    oklch(0.74 0.13 var(--hue));
  --accent-soft: oklch(0.74 0.13 var(--hue) / 0.14);
  --code-bg:   oklch(0.28 0.014 50);
  --quote-bar: oklch(0.74 0.13 var(--hue));
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }

:focus:not(:focus-visible) { outline: none; }
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}
#content:focus-visible { outline: none; }

/* Visually hidden but available to screen readers */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Skip link — visible only when focused via keyboard */
.skip-link {
  position: absolute;
  left: 8px;
  top: -100px;
  z-index: 100;
  padding: 8px 14px;
  background: var(--bg);
  color: var(--ink);
  border: 2px solid var(--accent);
  border-radius: 3px;
  font-size: 14px;
  font-weight: 500;
}
.skip-link:focus {
  top: 8px;
  color: var(--ink);
}

/* Layout */
.page {
  max-width: 720px;
  margin: 0 auto;
  padding: 56px var(--gutter) 120px;
}
@media (max-width: 600px) { .page { padding-top: 32px; } }

/* Masthead */
.mast {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 24px; padding-bottom: 28px;
  border-bottom: 1px solid var(--rule);
}
.mast-title {
  font-size: 19px; font-weight: 600; letter-spacing: -0.01em;
  display: flex; align-items: baseline; gap: 10px;
}
.mast-nav {
  display: flex; gap: 24px;
  font-size: 14px; color: var(--ink-soft);
}
.mast-nav a { transition: color .15s; }
.mast-nav button {
  all: unset; cursor: pointer; font: inherit; color: var(--ink-soft);
  display: inline-flex; align-items: center; gap: 6px;
}
.mast-nav button:hover { color: var(--accent); }
.mast-nav .theme-ico { width: 14px; height: 14px; }

/* Index list */
.lede {
  font-size: 15px; color: var(--ink-soft);
  max-width: 52ch; margin: 0 0 56px;
  line-height: 1.5;
}
.post-list { list-style: none; padding: 0; margin: 0; }
.post-row {
  padding: 22px 0;
  border-bottom: 1px solid var(--rule);
}
.post-row a.post-link {
  display: block;
}
.post-row .meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-mute);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  margin-bottom: 6px;
  display: flex; gap: 14px; align-items: center;
}
.post-row .meta .num { color: var(--accent); }
.post-row h2 {
  font-size: 21px; font-weight: 600; letter-spacing: -0.01em;
  margin: 0 0 8px;
  line-height: 1.25;
}
.post-row .excerpt {
  color: var(--ink-soft); font-size: 15px; line-height: 1.55;
  margin: 0;
  max-width: 60ch;
}
.post-row a.post-link:hover h2 { color: var(--accent); }

/* Pagination */
.pagi {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: 28px; padding-top: 0;
  font-family: var(--font-mono); font-size: 12px;
  text-transform: uppercase; letter-spacing: 0.04em;
  color: var(--ink-mute);
}
.pagi-pages { display: flex; gap: 4px; }
.pagi-pages a,
.pagi-pages .cur {
  padding: 6px 10px;
  color: var(--ink-soft); font: inherit;
  text-transform: uppercase; letter-spacing: 0.04em;
}
.pagi-pages .cur {
  color: var(--bg); background: var(--ink);
}
.pagi-pages a:hover { color: var(--accent); }
.pagi .nav {
  font: inherit;
  color: var(--ink-soft); transition: color .15s;
  text-transform: uppercase; letter-spacing: 0.04em;
}
.pagi a.nav:hover { color: var(--accent); }
.pagi .nav.disabled { opacity: 0.3; }

/* Footer */
.foot {
  margin-top: 48px; padding-top: 24px;
  border-top: 1px solid var(--rule);
  font-family: var(--font-mono); font-size: 11px;
  color: var(--ink-mute); text-transform: uppercase;
  letter-spacing: 0.06em;
  display: flex; justify-content: space-between; gap: 16px;
}
.foot a:hover { color: var(--accent); }

/* ---------- POST PAGE ---------- */
article.post {
  font-size: 17px; line-height: 1.65;
  padding: 32px 0 0;
}
article.post h1 {
  font-size: clamp(30px, 4.6vw, 42px);
  line-height: 1.1; letter-spacing: -0.022em; font-weight: 600;
  margin: 18px 0 18px;
}
article.post.about h1 { margin-bottom: 58px; }
article.post .post-meta {
  font-family: var(--font-mono); font-size: 12px;
  color: var(--ink-mute); text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 40px;
  display: flex; gap: 14px; align-items: center;
}
article.post .post-meta .dot-sep { width: 3px; height: 3px; background: var(--ink-mute); border-radius: 50%; }
article.post p { margin: 0 0 20px; max-width: 64ch; }

article.post h2 {
  font-size: 24px; font-weight: 600; letter-spacing: -0.012em;
  margin: 48px 0 14px; line-height: 1.25;
}
article.post h3 {
  font-size: 19px; font-weight: 600; letter-spacing: -0.005em;
  margin: 36px 0 10px;
}
article.post h4 {
  font-size: 15px; font-weight: 600;
  margin: 28px 0 8px;
  text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--ink-soft);
}

article.post a {
  color: var(--accent);
  border-bottom: 1px solid color-mix(in oklch, var(--accent), transparent 65%);
  transition: border-color .15s;
}
article.post a:hover { border-bottom-color: var(--accent); }

article.post strong { font-weight: 600; color: var(--ink); }
article.post em { font-style: italic; }

article.post ul, article.post ol { padding-left: 22px; margin: 0 0 20px; max-width: 62ch; }
article.post li { margin-bottom: 6px; }
article.post li::marker { color: var(--ink-mute); }

article.post blockquote {
  margin: 28px 0;
  padding: 4px 0 4px 24px;
  border-left: 2px solid var(--quote-bar);
  color: var(--ink-soft);
  font-size: 19px;
  line-height: 1.5;
  font-style: normal;
  max-width: 58ch;
}
article.post blockquote p { margin: 0 0 8px; }
article.post blockquote cite {
  display: block;
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-mute);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-top: 8px;
}
article.post blockquote cite::before { content: "— "; }

article.post figure {
  margin: 36px 0;
}
article.post figure img {
  display: block; width: 100%;
  border: 1px solid var(--rule);
}
article.post figcaption {
  font-family: var(--font-mono); font-size: 12px;
  color: var(--ink-mute); text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-top: 10px; text-align: left;
}

article.post code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--code-bg);
  padding: 1px 6px;
  border-radius: 3px;
  color: var(--ink);
}
article.post pre {
  background: var(--code-bg);
  padding: 18px 20px;
  margin: 24px 0 28px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.55;
  border-left: 2px solid var(--accent);
}
article.post pre code {
  background: transparent; padding: 0; border-radius: 0;
  color: var(--ink);
  font-size: inherit;
}

/* Shiki: keep design's pre shell (accent left border, --code-bg background).
   Shiki emits --shiki-light / --shiki-dark CSS variables on each <span>;
   we pick one based on the active theme. */
article.post pre.shiki,
article.post pre.shiki code {
  background: var(--code-bg) !important;
  color: var(--ink);
}
article.post pre.shiki .line,
article.post pre.shiki span {
  color: var(--shiki-light);
}
:root[data-theme="dark"] article.post pre.shiki .line,
:root[data-theme="dark"] article.post pre.shiki span {
  color: var(--shiki-dark);
}

article.post hr {
  border: none;
  text-align: center;
  margin: 44px 0;
  color: var(--ink-mute);
}
article.post hr::before {
  content: "* * *";
  letter-spacing: 0.5em;
  font-size: 14px;
}