:root {
  --paper: #FAFAF7;
  --panel: #FFFFFF;
  --ink: #16241D;
  --ink-soft: #4B5A51;
  --grid: #D9D4C4;
  --grid-strong: #B8B09A;
  --highlight: #F2C230;
  --match: #2B5940;
  --match-bg: #E7EFE6;
  --mono: 'IBM Plex Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --sans: 'Space Grotesk', system-ui, -apple-system, sans-serif;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
  box-sizing: border-box;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #14181A;
    --panel: #1D2224;
    --ink: #EDEFE9;
    --ink-soft: #A8B3AB;
    --grid: #3A4340;
    --grid-strong: #4C5854;
    --match: #7FBB9A;
    --match-bg: #1E332A;
  }
}
:root[data-theme="dark"] {
  --paper: #14181A;
  --panel: #1D2224;
  --ink: #EDEFE9;
  --ink-soft: #A8B3AB;
  --grid: #3A4340;
  --grid-strong: #4C5854;
  --match: #7FBB9A;
  --match-bg: #1E332A;
}
html { scroll-padding-top: env(safe-area-inset-top, 0px); }
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 0 24px; }

header.top { border-bottom: 1px solid var(--grid); padding: 20px 0; }
header.top .inner { max-width: 720px; margin: 0 auto; padding: 0 24px; display: flex; align-items: center; justify-content: space-between; }
.wordmark { font-weight: 700; font-size: 1.05rem; letter-spacing: -0.01em; color: var(--ink); text-decoration: none; }
.wordmark span { color: var(--ink-soft); font-weight: 500; }
nav.top-links { display: flex; gap: 20px; font-size: 0.9rem; }
nav.top-links a { color: var(--ink); text-decoration: none; border-bottom: 1px solid transparent; }
nav.top-links a:hover { border-bottom-color: var(--ink); }

main { padding: 48px 0 64px; }

.post-list { list-style: none; margin: 0; padding: 0; }
.post-list li { border-bottom: 1px solid var(--grid); padding: 24px 0; }
.post-list li:first-child { padding-top: 0; }
.post-list a.post-title { font-size: 1.25rem; font-weight: 700; color: var(--ink); text-decoration: none; letter-spacing: -0.01em; }
.post-list a.post-title:hover { color: var(--match); }
.post-list p.excerpt { color: var(--ink-soft); margin: 8px 0 0; font-size: 0.96rem; }

article h1 { font-size: clamp(1.7rem, 4vw, 2.3rem); letter-spacing: -0.02em; line-height: 1.15; margin: 0 0 24px; }
article h2 { font-size: 1.3rem; letter-spacing: -0.01em; margin: 36px 0 12px; }
article p { margin: 0 0 16px; }
article ul, article ol { margin: 0 0 16px; padding-left: 22px; }
article li { margin-bottom: 6px; }
article a { color: var(--match); }
article strong { font-weight: 700; }

.back-link { display: inline-block; margin-bottom: 28px; color: var(--ink-soft); text-decoration: none; font-size: 0.9rem; }
.back-link:hover { color: var(--ink); }

.cta-box {
  border: 1px solid var(--grid-strong);
  background: var(--panel);
  padding: 24px;
  margin-top: 48px;
}
.cta-box p { margin: 0 0 14px; color: var(--ink-soft); }
.cta-box a.cta-button {
  display: inline-block;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.92rem;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  padding: 11px 18px;
  text-decoration: none;
}
.cta-box a.cta-button:hover { opacity: 0.85; }

footer { border-top: 1px solid var(--grid); padding: 32px 0; color: var(--ink-soft); font-size: 0.86rem; }
footer a { color: inherit; }