/* ---------- tokens ---------- */
:root {
  --max-width: 38rem;
  --color-text: #1a1a1a;
  --color-muted: #6b6b6b;
  --color-bg: #fdfdfc;
  --color-link: #0451a5;
  --color-link-visited: #6f42c1;
  --color-code-bg: #f5f5f4;
  --color-border: #e5e5e3;

  --font-serif: Charter, "Bitstream Charter", "Sitka Text", Cambria, Georgia, serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; }

/* ---------- base ---------- */
html {
  font-family: var(--font-serif);
  font-size: 18px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

/* ---------- header ---------- */
.site-header {
  margin-bottom: 3rem;
}

.site-title {
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-text);
  text-decoration: none;
}

.site-title:hover { text-decoration: underline; }

/* ---------- typography ---------- */
h1, h2, h3, h4 {
  line-height: 1.25;
  font-weight: 600;
  margin: 2rem 0 1rem;
}

h1 { font-size: 1.625rem; }
h2 { font-size: 1.25rem; }
h3 { font-size: 1.1rem; }
h4 { font-size: 1rem; }

p { margin: 0 0 1rem; }

a {
  color: var(--color-link);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}
a:visited { color: var(--color-link-visited); }
a:hover { text-decoration-thickness: 2px; }

ul, ol { padding-left: 1.5rem; margin: 0 0 1rem; }
li { margin: 0.25rem 0; }

blockquote {
  margin: 1rem 0;
  padding: 0.25rem 0 0.25rem 1rem;
  border-left: 3px solid var(--color-border);
  color: var(--color-muted);
}

hr {
  border: 0;
  border-top: 1px solid var(--color-border);
  margin: 2rem 0;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 1.5rem auto;
}

table {
  border-collapse: collapse;
  width: 100%;
  margin: 1rem 0;
  font-size: 0.95rem;
}

th, td {
  text-align: left;
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--color-border);
}

th { font-weight: 600; }

/* ---------- code ---------- */
code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: var(--color-code-bg);
  padding: 0.1em 0.3em;
  border-radius: 3px;
}

pre {
  background: var(--color-code-bg);
  padding: 1rem;
  border-radius: 4px;
  overflow-x: auto;
  font-size: 0.9rem;
  line-height: 1.5;
  border: 1px solid var(--color-border);
  margin: 1rem 0;
}

pre code {
  background: none;
  padding: 0;
  border-radius: 0;
  font-size: inherit;
}

/* ---------- homepage intro ---------- */
.intro {
  margin-bottom: 2.5rem;
}

.intro h1 {
  margin-top: 0;
  font-size: 1.875rem;
}

/* ---------- post list (homepage) ---------- */
.post-list ul,
.post-list-full {
  list-style: none;
  padding: 0;
  margin: 0;
}

.post-list li,
.post-list-full li {
  margin: 0.5rem 0;
  display: flex;
  align-items: baseline;
  gap: 1.25rem;
}

.post-list time,
.post-list-full time {
  font-family: var(--font-mono);
  color: var(--color-muted);
  font-size: 0.88rem;
  flex-shrink: 0;
}

.post-list-empty {
  color: var(--color-muted);
  font-style: italic;
}

/* ---------- single post ---------- */
.post-header {
  margin-bottom: 2rem;
}

.post-header h1 {
  margin: 0 0 0.5rem;
  font-size: 1.875rem;
}

.post-header time {
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

/* ---------- tags ---------- */
.post-tags {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

.post-tags ul {
  list-style: none;
  padding: 0;
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin: 0;
}

.post-tags li {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-muted);
}

.post-tags li::before { content: "#"; }

/* ---------- footer ---------- */
.site-footer {
  margin-top: 4rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  color: var(--color-muted);
  font-size: 0.9rem;
}

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

/* ---------- 404 ---------- */
.not-found h1 { margin-top: 0; }

/* ---------- chroma (github-light palette) ---------- */
.chroma { background: var(--color-code-bg); }
.chroma .k,  .chroma .kd, .chroma .kn, .chroma .kp, .chroma .kr { color: #d73a49; font-weight: 600; }
.chroma .kt { color: #d73a49; }
.chroma .s,  .chroma .sb, .chroma .sc, .chroma .s1, .chroma .s2, .chroma .se, .chroma .sh, .chroma .si, .chroma .sx { color: #032f62; }
.chroma .sr { color: #032f62; }
.chroma .c,  .chroma .c1, .chroma .cm, .chroma .cp, .chroma .cs { color: #6a737d; font-style: italic; }
.chroma .nf, .chroma .nc { color: #6f42c1; }
.chroma .na, .chroma .nb, .chroma .nv, .chroma .nl { color: #005cc5; }
.chroma .nt { color: #22863a; }
.chroma .o,  .chroma .ow { color: #d73a49; }
.chroma .mi, .chroma .mf, .chroma .mb, .chroma .mh, .chroma .mo { color: #005cc5; }
.chroma .err { color: #b31d28; background-color: #ffeef0; }

/* ---------- mobile ---------- */
@media (max-width: 480px) {
  html { font-size: 17px; }
  body { padding: 1.5rem 1rem 3rem; }
  .post-list li,
  .post-list-full li { flex-direction: column; gap: 0.1rem; }
}