:root {
  --bg: #fbfbf9;
  --fg: #1b1b19;
  --muted: #6a6a64;
  --line: #e3e3dc;
  --accent: #a8492a;
  --code-bg: #f0f0eb;
  --maxw: 44rem;
}

html[data-theme="dark"] {
  --bg: #121211;
  --fg: #e9e9e4;
  --muted: #9b9b94;
  --line: #2b2b28;
  --accent: #e08a5f;
  --code-bg: #1c1c1a;
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]) {
    --bg: #121211;
    --fg: #e9e9e4;
    --muted: #9b9b94;
    --line: #2b2b28;
    --accent: #e08a5f;
    --code-bg: #1c1c1a;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 ui-sans-serif, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  text-rendering: optimizeLegibility;
}

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

a { color: var(--accent); text-decoration: none; }
a:hover, a:focus { text-decoration: underline; }

h1 { font-size: 1.7rem; line-height: 1.25; margin: 0 0 .6rem; letter-spacing: -0.01em; }
h2 { font-size: 1.15rem; margin: 2rem 0 .5rem; }
h3 { font-size: 1rem; margin: 1.6rem 0 .4rem; }

p { margin: 0 0 1rem; }

code, pre {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: .875em;
}

code { background: var(--code-bg); padding: .12em .35em; border-radius: 3px; }

pre {
  background: var(--code-bg);
  padding: .9rem 1rem;
  border-radius: 6px;
  overflow-x: auto;
  border: 1px solid var(--line);
}

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

blockquote {
  margin: 1.2rem 0;
  padding: .1rem 1rem;
  border-left: 3px solid var(--line);
  color: var(--muted);
}

hr { border: 0; border-top: 1px solid var(--line); margin: 2.2rem 0; }

/* Header / footer */
.site-header {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1.3rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px solid var(--line);
}

.brand { color: var(--fg); font-weight: 650; letter-spacing: -0.01em; }
.brand:hover { text-decoration: none; color: var(--accent); }

.site-header nav { display: flex; align-items: center; gap: 1rem; font-size: .92rem; }
.site-header nav a { color: var(--muted); }
.site-header nav a[aria-current="page"], .site-header nav a:hover { color: var(--fg); text-decoration: none; }

.theme-toggle {
  background: none;
  border: 1px solid var(--line);
  color: var(--muted);
  border-radius: 50%;
  width: 1.9rem;
  height: 1.9rem;
  line-height: 1;
  cursor: pointer;
  font-size: .9rem;
  padding: 0;
}
.theme-toggle:hover { color: var(--fg); border-color: var(--muted); }

.site-footer {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
  color: var(--muted);
  font-size: .88rem;
  border-top: 1px solid var(--line);
}
.site-footer p { margin: 0; }

/* Home */
.lede { color: var(--muted); font-size: 1.02rem; margin-bottom: 2rem; }

.post-list { list-style: none; margin: 0; padding: 0; }
.post-list li { padding: 1.15rem 0; border-top: 1px solid var(--line); }
.post-list time { display: block; color: var(--muted); font-size: .82rem; font-variant-numeric: tabular-nums; }
.post-list a { font-size: 1.08rem; font-weight: 600; color: var(--fg); }
.post-list a:hover { color: var(--accent); }
.post-list p { margin: .35rem 0 0; color: var(--muted); font-size: .95rem; }

/* Article */
.post-meta { color: var(--muted); font-size: .85rem; margin-bottom: 1.8rem; }
.back { display: inline-block; margin-top: 2.5rem; font-size: .9rem; }
ul, ol { padding-left: 1.2rem; }
li { margin: .3rem 0; }