/* Shared styles for blog pages. Tokens mirror index.html so pages feel like one site. */
:root {
  --bg: #0a0d14;
  --bg-2: #0d111a;
  --surface: #0f131c;
  --surface-2: #131826;
  --surface-hover: #181e2e;
  --border: #1e2533;
  --border-strong: #2a3344;
  --text: #e8ecf3;
  --text-muted: #8a96aa;
  --text-dim: #5b6478;
  --accent: #06d6a0;
  --accent-2: #1e91ff;
  --accent-dim: rgba(6, 214, 160, 0.12);
  --accent-glow: rgba(6, 214, 160, 0.35);
  --warn: #fbbf24;
  --max-w: 1180px;
  --prose-w: 72ch;
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --radius: 14px;
  --radius-sm: 8px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  font-feature-settings: 'cv11', 'ss01', 'ss03';
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(900px 600px at 10% -5%, rgba(6, 214, 160, 0.08), transparent 60%),
    radial-gradient(700px 500px at 95% 10%, rgba(30, 145, 255, 0.07), transparent 60%),
    linear-gradient(transparent 95%, rgba(255, 255, 255, 0.025) 95%),
    linear-gradient(90deg, transparent 95%, rgba(255, 255, 255, 0.025) 95%);
  background-size: auto, auto, 32px 32px, 32px 32px;
  z-index: 0;
}

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

.wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 48px);
  position: relative;
  z-index: 1;
}

/* Nav (same as home) */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: rgba(10, 13, 20, 0.72);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding: 14px 0;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.01em;
}
.brand-dot {
  width: 9px; height: 9px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 14px var(--accent-glow);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.55; transform: scale(0.85); }
}
.nav-links { display: flex; gap: 4px; flex-wrap: wrap; }
.nav-links a {
  padding: 7px 12px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text-muted);
  transition: color 0.2s, background 0.2s;
}
.nav-links a:hover { color: var(--text); background: var(--surface-2); }
.nav-links a.active { color: var(--accent); }
@media (max-width: 640px) {
  .nav-links a { padding: 6px 8px; font-size: 13px; }
  .brand .brand-text { display: none; }
}

/* Type */
h1, h2, h3, h4 { letter-spacing: -0.02em; line-height: 1.15; }
h1 { font-size: clamp(2.1rem, 4.6vw, 3.4rem); font-weight: 800; margin: 0 0 14px; }
h2 { font-size: clamp(1.45rem, 2.4vw, 1.9rem); font-weight: 700; margin: 0 0 18px; }
h3 { font-size: 1.15rem; font-weight: 600; margin: 0 0 8px; }
p { color: var(--text-muted); margin: 0 0 16px; }
.lede { font-size: 1.06rem; color: var(--text); max-width: 68ch; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  letter-spacing: 0.04em;
  margin-bottom: 14px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.eyebrow::before { content: '//'; color: var(--text-dim); }
.eyebrow .sep { color: var(--text-dim); }
.eyebrow time { color: var(--accent); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 10px;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  transition: border-color 0.2s, background 0.2s, transform 0.2s, color 0.2s;
}
.btn:hover { border-color: var(--accent); background: var(--surface-2); color: var(--accent); transform: translateY(-1px); }

.tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.02em;
  padding: 3px 9px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
}

/* Listing */
main.wrap { padding-top: clamp(40px, 7vw, 80px); padding-bottom: clamp(48px, 8vw, 96px); }
.listing-header { margin-bottom: clamp(28px, 4vw, 48px); }
.post-list { display: flex; flex-direction: column; border-top: 1px solid var(--border); max-width: 860px; }
.post-row {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr) auto;
  gap: 28px;
  align-items: baseline;
  padding: 22px 6px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  transition: background 0.2s;
}
.post-row:hover { background: var(--surface); color: var(--text); }
.post-date { font-family: var(--font-mono); font-size: 13px; color: var(--accent); white-space: nowrap; }
.post-row-body { display: block; min-width: 0; }
.post-title { display: block; font-size: 1.15rem; font-weight: 600; letter-spacing: -0.01em; transition: color 0.2s; }
.post-row:hover .post-title { color: var(--accent); }
.post-row p { font-size: 14.5px; margin: 6px 0 0; }
.post-arrow { color: var(--text-dim); font-family: var(--font-mono); transition: color 0.2s, transform 0.2s; }
.post-row:hover .post-arrow { color: var(--accent); transform: translateX(3px); }
@media (max-width: 640px) {
  .post-row { grid-template-columns: 1fr; gap: 6px; }
  .post-arrow { display: none; }
}

.post-card {
  display: block;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  background: var(--surface);
  transition: border-color 0.25s, transform 0.25s, background 0.25s;
  color: var(--text);
}
.post-card:hover { border-color: var(--border-strong); background: var(--surface-2); transform: translateY(-2px); color: var(--text); }
.post-card h3 { color: var(--text); margin: 8px 0 8px; font-size: 1.2rem; }
.post-card:hover h3 { color: var(--accent); }
.post-card p { font-size: 14.5px; margin: 0 0 14px; }
.post-meta {
  display: flex; gap: 8px; align-items: center;
  font-family: var(--font-mono); font-size: 12px; color: var(--text-dim);
}
.post-meta time { color: var(--accent); }
.empty { color: var(--text-dim); font-family: var(--font-mono); font-size: 13px; }

/* Post */
.post { max-width: var(--prose-w); margin: 0 auto; }
.post-header { margin-bottom: 36px; }
.post-header .back {
  display: block;
  width: max-content;
  font-family: var(--font-mono); font-size: 13px; color: var(--text-dim);
  margin-bottom: 22px;
}
.post-header .back:hover { color: var(--accent); }
.post-header h1 { margin-bottom: 12px; }
.post-summary { font-size: 1.12rem; color: var(--text-muted); margin-bottom: 18px; }
.post-footer {
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  margin-top: 56px; padding-top: 28px; border-top: 1px solid var(--border);
}

.toc {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 16px 20px;
  margin: 0 0 36px;
  font-size: 14.5px;
}
.toc-label { font-family: var(--font-mono); font-size: 12px; color: var(--text-dim); letter-spacing: 0.04em; margin-bottom: 6px; }
.toc .toc { border: 0; padding: 0; margin: 0; background: none; }
.toc ul { list-style: none; margin: 0; padding: 0; }
.toc ul ul { padding-left: 16px; }
.toc li { margin: 4px 0; }
.toc a { color: var(--text-muted); }
.toc a:hover { color: var(--accent); }

/* Prose */
.prose { font-size: 17px; line-height: 1.75; color: var(--text); }
.prose > * + * { margin-top: 1.1em; }
.prose p { color: var(--text); margin: 0; }
.prose h2 { margin: 2.2em 0 0.6em; padding-top: 0.3em; }
.prose h3 { margin: 1.8em 0 0.5em; font-size: 1.25rem; }
.prose h4 { margin: 1.5em 0 0.4em; font-size: 1.05rem; color: var(--text-muted); }
.prose h2:first-child, .prose h3:first-child { margin-top: 0; }
.prose a { color: var(--accent); border-bottom: 1px solid rgba(6, 214, 160, 0.28); transition: border-color 0.2s; }
.prose a:hover { border-bottom-color: var(--accent); }
.prose .headerlink {
  margin-left: 0.4em; color: var(--text-dim); border: 0; font-weight: 400;
  opacity: 0; transition: opacity 0.15s;
}
.prose h2:hover .headerlink, .prose h3:hover .headerlink, .prose h4:hover .headerlink { opacity: 1; }
.prose strong { color: var(--text); font-weight: 600; }
.prose em { color: var(--text); }
.prose ul, .prose ol { padding-left: 1.4em; color: var(--text); }
.prose li { margin: 0.35em 0; }
.prose li::marker { color: var(--text-dim); }
.prose hr { border: 0; border-top: 1px solid var(--border); margin: 2.4em 0; }

.prose blockquote {
  margin: 0; padding: 4px 0 4px 20px;
  border-left: 3px solid var(--accent);
  color: var(--text-muted);
}
.prose blockquote p { color: inherit; }

.prose code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.12em 0.4em;
  color: var(--text);
}
.prose pre {
  margin: 0;
  padding: 16px 18px;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  font-size: 13.5px;
  line-height: 1.6;
}
.prose pre code { background: none; border: 0; padding: 0; font-size: inherit; color: inherit; }
.prose .highlight { position: relative; }

.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.prose th, .prose td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: top; }
.prose th { background: var(--surface-2); font-family: var(--font-mono); font-size: 12.5px; font-weight: 600; color: var(--text-muted); letter-spacing: 0.02em; }
.prose tr:last-child td { border-bottom: 0; }
.prose tbody tr:hover td { background: var(--surface); }

.prose figure { margin: 1.6em 0; }
.prose figure img, .prose img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
}
.prose figcaption {
  margin-top: 10px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-dim);
}

/* Math (KaTeX) */
.prose .arithmatex { color: var(--text); }
.prose div.arithmatex { overflow-x: auto; overflow-y: hidden; padding: 6px 0; }
.prose .katex-display { margin: 0.4em 0; }
.prose .katex { font-size: 1.06em; }

/* Footnotes */
.prose .footnote { margin-top: 2.5em; font-size: 14.5px; color: var(--text-muted); }
.prose .footnote hr { margin: 0 0 1em; }
.prose .footnote ol { padding-left: 1.2em; }
.prose .footnote p { color: inherit; display: inline; }
.prose .footnote-ref, .prose .footnote-backref { border: 0; font-family: var(--font-mono); font-size: 0.8em; }
.prose sup { line-height: 0; }

/* Definition lists */
.prose dt { font-weight: 600; color: var(--text); margin-top: 0.8em; }
.prose dd { margin: 0.2em 0 0 1.2em; color: var(--text-muted); }

/* Syntax highlighting (Pygments classes), tuned to the dark palette */
.highlight .c, .highlight .ch, .highlight .cm, .highlight .c1, .highlight .cs, .highlight .cp, .highlight .cpf { color: #5b6478; font-style: italic; }
.highlight .k, .highlight .kc, .highlight .kd, .highlight .kn, .highlight .kp, .highlight .kr, .highlight .kt, .highlight .ow { color: #c792ea; }
.highlight .n, .highlight .nx, .highlight .p, .highlight .w { color: #e8ecf3; }
.highlight .nb, .highlight .bp { color: #82aaff; }
.highlight .nf, .highlight .fm, .highlight .nc, .highlight .nn { color: #82aaff; }
.highlight .nd { color: #ffcb6b; }
.highlight .na, .highlight .nt { color: #f78c6c; }
.highlight .nv, .highlight .vc, .highlight .vg, .highlight .vi, .highlight .vm { color: #e8ecf3; }
.highlight .o { color: #89ddff; }
.highlight .s, .highlight .sa, .highlight .sb, .highlight .sc, .highlight .dl, .highlight .sd, .highlight .s2, .highlight .se, .highlight .sh, .highlight .si, .highlight .sx, .highlight .sr, .highlight .s1, .highlight .ss { color: #06d6a0; }
.highlight .m, .highlight .mb, .highlight .mf, .highlight .mh, .highlight .mi, .highlight .il, .highlight .mo { color: #f78c6c; }
.highlight .err { color: #ff5370; }
.highlight .gd { color: #ff5370; }
.highlight .gi { color: #06d6a0; }
.highlight .gh, .highlight .gu { color: #82aaff; font-weight: 600; }
.highlight .ge { font-style: italic; }
.highlight .gs { font-weight: 600; }

/* Footer (same as home) */
footer {
  border-top: 1px solid var(--border);
  padding: 36px 0 56px;
  margin-top: 32px;
}
.foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-dim);
}

::selection { background: var(--accent-dim); color: var(--text); }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 10px; }

@media (prefers-reduced-motion: reduce) {
  .brand-dot { animation: none; }
  html { scroll-behavior: auto; }
}