/* ── Design tokens ─────────────────────────────────────── */
:root {
  --paper:        oklch(98.2% 0.008 80);
  --paper-2:      oklch(96.5% 0.012 80);
  --ink:          oklch(20% 0.015 60);
  --ink-2:        oklch(40% 0.012 60);
  --ink-3:        oklch(60% 0.012 60);
  --rule:         oklch(85% 0.012 80);
  --accent:       oklch(53% 0.16 35);
  --accent-soft:  oklch(53% 0.16 35 / 0.12);
  --mark:         oklch(42% 0.08 150);
  --measure:      66ch;
  --pad-x:        clamp(20px, 5vw, 64px);
  --serif:        "Newsreader", "Iowan Old Style", Georgia, serif;
  --sans:         "Inter Tight", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --mono:         "JetBrains Mono", ui-monospace, Menlo, monospace;
}
html[data-mode="dark"] {
  --paper:        oklch(15% 0.01 60);
  --paper-2:      oklch(19% 0.012 60);
  --ink:          oklch(94% 0.008 80);
  --ink-2:        oklch(72% 0.012 80);
  --ink-3:        oklch(54% 0.012 80);
  --rule:         oklch(28% 0.012 60);
  --accent:       oklch(72% 0.14 40);
  --accent-soft:  oklch(72% 0.14 40 / 0.16);
  --mark:         oklch(72% 0.11 150);
}

/* ── Resets ────────────────────────────────────────────── */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--paper); color: var(--ink); }
body {
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01", "cv05", "cv11";
  transition: background-color .25s, color .25s;
}
a { color: var(--ink); text-decoration: none; }
a:hover { color: var(--accent); }
::selection { background: var(--accent-soft); color: var(--ink); }

/* ── Site header ──────────────────────────────────────── */
.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-2);
  text-decoration: none;
}
.avatar {
  width: 30px; height: 30px;
  border-radius: 50%;
  background: var(--mark);
  color: var(--paper);
  display: inline-flex;
  align-items: center; justify-content: center;
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-size: 19px;
  line-height: 1;
  text-transform: none;
  letter-spacing: 0;
  padding: 1px 1px 0 0;
  flex-shrink: 0;
  transition: background .2s;
}
.wordmark:hover .avatar { background: var(--accent); }

/* ── Site nav ─────────────────────────────────────────── */
.site-nav {
  display: flex; align-items: center; gap: 22px;
  font-family: var(--mono); font-size: 12.5px;
  letter-spacing: 0.04em; text-transform: uppercase; color: var(--ink-2);
}
.site-nav a { text-decoration: none; }
.site-nav a:hover { color: var(--accent); }

/* ── Dark / light toggle ──────────────────────────────── */
.mode-toggle {
  appearance: none; border: 1px solid var(--rule); background: transparent;
  width: 30px; height: 30px; border-radius: 50%;
  cursor: pointer; color: var(--ink-2);
  display: inline-flex; align-items: center; justify-content: center;
  transition: border-color .2s, color .2s;
}
.mode-toggle:hover { color: var(--accent); border-color: var(--accent); }
.mode-toggle svg { width: 14px; height: 14px; }
html[data-mode="dark"] .mode-toggle .sun { display: none; }
html[data-mode="light"] .mode-toggle .moon { display: none; }