/* ---------- theme tokens ---------- */
:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #6b6b6b;
  --accent: #0060df;
  --border: #e2e2e2;
  --code-bg: #f6f8fa;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --max-width: 65ch;
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 2rem;
  --space-4: 3rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --fg: #e6e6e6;
    --muted: #9a9a9a;
    --accent: #6ea8ff;
    --border: #2a2f37;
    --code-bg: #161b22;
  }
}

/* ---------- reset ---------- */
* {
  box-sizing: border-box;
}

body,
h1,
h2,
h3,
p,
ul,
figure {
  margin: 0;
}

ul {
  padding: 0;
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
}

/* ---------- base typography ---------- */
html {
  color-scheme: light dark;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ---------- layout ---------- */
.container {
  max-width: var(--max-width);
  margin-inline: auto;
  padding: var(--space-3) var(--space-2);
}

/* ---------- header / nav ---------- */
.site-header {
  max-width: var(--max-width);
  margin-inline: auto;
  padding: var(--space-2);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  border-bottom: 1px solid var(--border);
}

.site-title {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--fg);
  text-decoration: none;
}

.site-nav a {
  margin-left: var(--space-2);
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
}

.site-nav a:hover {
  color: var(--accent);
}

/* ---------- footer ---------- */
.site-footer {
  max-width: var(--max-width);
  margin-inline: auto;
  padding: var(--space-2);
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
}

.site-footer a {
  color: var(--muted);
}

/* ---------- home / post list ---------- */
.bio {
  color: var(--muted);
  margin-bottom: var(--space-3);
}

.post-list-item {
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--border);
}

.post-list-item:first-child {
  padding-top: 0;
}

.post-list-title {
  font-weight: 600;
  color: var(--fg);
  text-decoration: none;
}

.post-list-title:hover {
  color: var(--accent);
}

.post-list-date {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 0.15rem;
}

.post-list-desc {
  margin-top: 0.4rem;
  color: var(--muted);
  font-size: 0.95rem;
}

/* ---------- article typography ---------- */
.post-header {
  margin-bottom: var(--space-3);
}

.post-header h1 {
  font-size: 1.75rem;
  line-height: 1.3;
}

.post-meta {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 0.5rem;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.6rem;
  padding: 0;
  list-style: none;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.15rem 0.6rem;
}

article h2 {
  font-size: 1.3rem;
  margin-top: var(--space-3);
  margin-bottom: var(--space-1);
}

article h3 {
  font-size: 1.1rem;
  margin-top: var(--space-2);
  margin-bottom: var(--space-1);
}

article p {
  margin-bottom: var(--space-2);
}

article ul,
article ol {
  margin-bottom: var(--space-2);
  padding-left: 1.4rem;
}

article ul {
  list-style: disc;
}

article ol {
  list-style: decimal;
}

article blockquote {
  border-left: 3px solid var(--accent);
  padding-left: var(--space-2);
  color: var(--muted);
  margin: var(--space-2) 0;
}

article a {
  color: var(--accent);
}

article hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: var(--space-3) 0;
}

/* ---------- code ---------- */
code {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

:not(pre) > code {
  background: var(--code-bg);
  padding: 0.15em 0.4em;
  border-radius: 4px;
}

pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: var(--space-2);
  overflow-x: auto;
  margin-bottom: var(--space-2);
}

pre code {
  background: none;
  padding: 0;
}

/* ---------- accessibility ---------- */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ---------- syntax highlighting (chroma) ----------
   Generated with `go run ./cmd/chromacss`, matching the chroma style
   goldmark uses in internal/render/markdown.go (highlighting.WithStyle),
   so code block colors always match what was rendered at build time.
   Background-color is intentionally stripped from the generated .chroma
   rule below so our own `pre { background: var(--code-bg) }` controls it. */
.chroma { -webkit-text-size-adjust: none; }
.chroma .lnlinks { outline: none; text-decoration: none; color: inherit }
.chroma .lntd { vertical-align: top; padding: 0; margin: 0; border: 0; }
.chroma .lntable { border-spacing: 0; padding: 0; margin: 0; border: 0; }
.chroma .lnt { white-space: pre; -webkit-user-select: none; user-select: none; margin-right: 0.4em; padding: 0 0.4em 0 0.4em; color: #7f7f7f }
.chroma .ln { white-space: pre; -webkit-user-select: none; user-select: none; margin-right: 0.4em; padding: 0 0.4em 0 0.4em; color: #7f7f7f }
.chroma .line { display: flex; }
.chroma .k, .chroma .kc, .chroma .kd, .chroma .kn, .chroma .kp, .chroma .kr, .chroma .kt { color: #cf222e }
.chroma .na, .chroma .nc, .chroma .nx, .chroma .p { color: #1f2328 }
.chroma .no, .chroma .nd, .chroma .nt, .chroma .m, .chroma .mb, .chroma .mf, .chroma .mh, .chroma .mi, .chroma .il, .chroma .mo, .chroma .o, .chroma .ow, .chroma .or { color: #0550ae }
.chroma .ni, .chroma .nb { color: #6639ba }
.chroma .nl { color: #990000; font-weight: bold }
.chroma .nn { color: #24292e }
.chroma .bp { color: #6a737d }
.chroma .nv, .chroma .vc, .chroma .vg, .chroma .vi, .chroma .vm { color: #953800 }
.chroma .nf, .chroma .fm { color: #6639ba }
.chroma .s, .chroma .sa, .chroma .sb, .chroma .sc, .chroma .dl, .chroma .sd, .chroma .s2, .chroma .se, .chroma .sh, .chroma .si, .chroma .sx, .chroma .sr, .chroma .s1 { color: #0a3069 }
.chroma .ss { color: #032f62 }
.chroma .c, .chroma .ch, .chroma .cm, .chroma .c1, .chroma .cs, .chroma .cp, .chroma .cpf { color: #57606a }
.chroma .gd { color: #82071e; background-color: #ffebe9 }
.chroma .ge, .chroma .go { color: #1f2328 }
.chroma .gi { color: #116329; background-color: #dafbe1 }
.chroma .gl { text-decoration: underline }
.chroma .w { color: #ffffff }

@media (prefers-color-scheme: dark) {
  .chroma .lnt { color: #737679 }
  .chroma .ln { color: #6e7681 }
  .chroma .hl { background-color: #6e7681 }
  .chroma .k, .chroma .kd, .chroma .kn, .chroma .kr, .chroma .kt { color: #ff7b72 }
  .chroma .kc, .chroma .kp { color: #79c0ff }
  .chroma .nc, .chroma .ne { color: #f0883e; font-weight: bold }
  .chroma .no, .chroma .nl { color: #79c0ff; font-weight: bold }
  .chroma .py, .chroma .nv, .chroma .vc, .chroma .vg, .chroma .vi, .chroma .vm, .chroma .ld { color: #79c0ff }
  .chroma .nd { color: #d2a8ff; font-weight: bold }
  .chroma .ni { color: #ffa657 }
  .chroma .nn { color: #ff7b72 }
  .chroma .nt { color: #7ee787 }
  .chroma .nf, .chroma .fm { color: #d2a8ff; font-weight: bold }
  .chroma .l, .chroma .s, .chroma .sb, .chroma .sc, .chroma .sd, .chroma .s2, .chroma .si, .chroma .sx, .chroma .s1, .chroma .ss, .chroma .m, .chroma .mb, .chroma .mf, .chroma .mh, .chroma .mi, .chroma .il, .chroma .mo { color: #a5d6ff }
  .chroma .sa, .chroma .se, .chroma .sh, .chroma .sr, .chroma .dl { color: #79c0ff }
  .chroma .o, .chroma .ow, .chroma .or { color: #ff7b72; font-weight: bold }
  .chroma .c, .chroma .ch, .chroma .cm, .chroma .c1 { color: #8b949e; font-style: italic }
  .chroma .cs, .chroma .cp, .chroma .cpf { color: #8b949e; font-weight: bold; font-style: italic }
  .chroma .gd { color: #ffa198; background-color: #490202 }
  .chroma .ge { font-style: italic }
  .chroma .gr { color: #ffa198 }
  .chroma .gh, .chroma .gu { color: #79c0ff }
  .chroma .gh { font-weight: bold }
  .chroma .gi { color: #56d364; background-color: #0f5323 }
  .chroma .go, .chroma .gp { color: #8b949e }
  .chroma .gs { font-weight: bold }
  .chroma .gt { color: #ff7b72 }
  .chroma .gl { text-decoration: underline }
  .chroma .w { color: #6e7681 }
}