:root {
  --bg: oklch(0.965 0.008 145);
  --bg-deep: oklch(0.2 0.028 155);
  --paper: oklch(0.995 0.003 145);
  --ink: oklch(0.2 0.02 155);
  --ink-soft: oklch(0.4 0.02 155);
  --ink-mute: oklch(0.55 0.015 155);
  --line: oklch(0.88 0.015 145);
  --accent: oklch(0.42 0.11 155);
  --accent-soft: oklch(0.93 0.03 155);
  --font-serif: "Newsreader", Georgia, serif;
  --font-sans: "IBM Plex Sans", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --max: 760px;
  --max-wide: 1100px;
  --radius: 12px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--ink); }
.skip-link {
  position: absolute; top: -100px; left: 16px; z-index: 9999;
  background: var(--ink); color: var(--paper); padding: 10px 18px;
  font-size: 13px; border-radius: 0 0 8px 8px; text-decoration: none;
}
.skip-link:focus { top: 0; }
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in oklch, var(--paper) 92%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.site-header__inner {
  max-width: var(--max-wide);
  margin: 0 auto;
  padding: 0 24px;
  height: 58px;
  display: flex; align-items: center; gap: 20px;
}
.brand {
  font-family: var(--font-serif);
  font-size: 18px; font-weight: 500;
  color: var(--ink); text-decoration: none; letter-spacing: -0.02em;
}
.site-header__cta { margin-left: auto; display: flex; gap: 8px; align-items: center; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-sans); font-weight: 600; font-size: 13px;
  padding: 9px 16px; border-radius: 10px; text-decoration: none;
  border: 1px solid transparent; color: var(--ink);
}
.btn--primary { background: var(--ink); color: var(--paper); }
.btn--primary:hover { opacity: 0.9; color: var(--paper); }
.btn--ghost { color: var(--ink-soft); border-color: var(--line); }
.btn--ghost:hover { color: var(--ink); background: var(--paper); }
.btn--outline { border-color: var(--line); background: var(--paper); color: var(--ink); }
.btn--outline:hover { border-color: var(--ink-mute); }
.crumb {
  max-width: var(--max); margin: 0 auto; padding: 20px 24px 0;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--ink-mute);
}
.crumb a { color: var(--ink-soft); text-decoration: none; }
.crumb a:hover { color: var(--accent); }
.crumb span { margin: 0 6px; opacity: 0.5; }
.hero { max-width: var(--max); margin: 0 auto; padding: 28px 24px 8px; }
.hero__mark {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 56px; height: 40px; padding: 0 14px; margin-bottom: 18px;
  font-family: var(--font-mono); font-size: 13px; font-weight: 600;
  letter-spacing: 0.06em; color: var(--accent); background: var(--accent-soft);
  border: 1px solid color-mix(in oklch, var(--accent) 28%, transparent);
  border-radius: 999px;
}
.hero h1 {
  font-family: var(--font-serif); font-size: clamp(28px, 4.5vw, 42px);
  font-weight: 400; letter-spacing: -0.025em; line-height: 1.15; margin-bottom: 14px;
}
.hero__lead { font-size: 17px; color: var(--ink-soft); max-width: 54ch; margin-bottom: 20px; }
.content { max-width: var(--max); margin: 0 auto; padding: 16px 24px 48px; }
.content h2 { font-family: var(--font-serif); font-size: 22px; font-weight: 400; margin: 32px 0 12px; }
.content p { margin-bottom: 14px; color: var(--ink-soft); }
.content p strong { color: var(--ink); font-weight: 600; }
.content ul { list-style: none; display: grid; gap: 10px; margin: 12px 0 20px; }
.content li {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 14px 16px; color: var(--ink-soft);
}
.content li strong { color: var(--ink); }
.callout {
  margin: 24px 0; padding: 16px 18px; background: var(--accent-soft);
  border: 1px solid color-mix(in oklch, var(--accent) 22%, transparent);
  border-radius: var(--radius);
}
.callout p { margin: 0; color: var(--ink); font-size: 15px; }
.related { display: flex; flex-wrap: wrap; gap: 10px 14px; margin-top: 8px; }
.related a {
  font-family: var(--font-mono); font-size: 11px; text-transform: uppercase;
  letter-spacing: 0.07em; text-decoration: none; color: var(--accent);
  border-bottom: 1px solid color-mix(in oklch, var(--accent) 35%, transparent);
  padding-bottom: 2px;
}
.related a:hover { color: var(--ink); }
.cta-band { max-width: var(--max); margin: 0 auto 48px; padding: 0 24px; }
.cta-band__inner {
  background: var(--bg-deep); color: oklch(0.96 0.01 145); border-radius: 16px;
  padding: 32px 28px; display: flex; align-items: center; justify-content: space-between;
  gap: 24px; flex-wrap: wrap;
}
.cta-band h2 { font-family: var(--font-serif); font-size: 26px; font-weight: 400; margin-bottom: 8px; }
.cta-band p { color: oklch(0.82 0.02 145); font-size: 14px; max-width: 420px; }
.cta-band .btn--primary { background: oklch(0.96 0.01 145); color: var(--bg-deep); }
.site-footer { padding: 28px 24px; border-top: 1px solid var(--line); }
.site-footer__inner {
  max-width: var(--max-wide); margin: 0 auto; display: flex;
  justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-size: 13px; color: var(--ink-mute);
}
.site-footer a { color: var(--ink-soft); text-decoration: none; }
.site-footer a:hover { color: var(--accent); }