:root {
  --bg: #faf9f5;
  --ink: #1a1a1a;
  --ink-soft: #3a3a3a;
  --ink-mute: #7a7a7a;
  --line: #e6e3da;
  --accent: #c25b2c;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

a:hover { opacity: 0.85; }

.page {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(250, 249, 245, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-decoration: none;
}

.brand-mark {
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 24px;
  font-size: 14px;
}

.nav-links a {
  color: var(--ink-soft);
  text-decoration: none;
}

main {
  flex: 1;
}

.container {
  max-width: 70ch;
  margin: 0 auto;
  padding: 48px 24px 72px;
}

.label-mute {
  font-size: 13px;
  color: var(--ink-mute);
}

h1 {
  margin: 8px 0 0;
  font-size: clamp(28px, 4vw, 38px);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

h2 {
  margin: 40px 0 12px;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
}

p {
  margin: 12px 0;
  color: var(--ink-soft);
}

strong {
  color: var(--ink);
  font-weight: 600;
}

ul, ol {
  padding-left: 24px;
  color: var(--ink-soft);
}

li {
  margin: 6px 0;
}

li::marker {
  color: var(--ink-mute);
}

.intro {
  margin-top: 24px;
}

footer {
  border-top: 1px solid var(--line);
  padding: 24px;
  text-align: center;
  font-size: 13px;
  color: var(--ink-mute);
}

footer a {
  color: var(--ink-soft);
  text-decoration: none;
  margin: 0 8px;
}

footer a:hover {
  color: var(--ink);
}