:root {
  --bg: #fbf8f3;
  --fg: #1f1b16;
  --muted: #645c51;
  --accent: #7a4a1e;
  --rule: #e6dfd3;
  --card: #ffffff;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #151310;
    --fg: #ede8e0;
    --muted: #a69e92;
    --accent: #dca86f;
    --rule: #2c2823;
    --card: #1d1a16;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header, main, footer {
  width: 100%;
  max-width: 44rem;
  margin: 0 auto;
  padding-left: 16px;
  padding-right: 16px;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding-top: 1.25rem;
  padding-bottom: 1.25rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: .6rem;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--fg);
  text-decoration: none;
}
.brand img { border-radius: 8px; }

nav { display: flex; gap: 1.1rem; font-size: .95rem; }
nav a { color: var(--muted); text-decoration: none; }
nav a:hover, nav a[aria-current="page"] { color: var(--fg); }

main { flex: 1; padding-top: 2.5rem; padding-bottom: 3rem; }

.hero { padding-top: 6vh; }
.hero img { border-radius: 22%; margin-bottom: 1.25rem; }

h1 { font-size: 2.25rem; line-height: 1.15; margin: 0 0 .75rem; letter-spacing: -0.02em; }
h2 { font-size: 1.3rem; margin: 2.25rem 0 .5rem; }
h3 { font-size: 1.05rem; margin: 1.5rem 0 .25rem; }

.lede { font-size: 1.2rem; color: var(--muted); margin: 0 0 2rem; }
.meta { color: var(--muted); font-size: .9rem; }

a { color: var(--accent); text-underline-offset: 3px; }

ul { padding-left: 1.25rem; }
li { margin: .25rem 0; }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}
.card {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 1rem 1.1rem;
}
.card h3 { margin-top: 0; }
.card p { margin: 0; color: var(--muted); font-size: .95rem; }

.toc { border: 1px solid var(--rule); border-radius: 12px; padding: .75rem 1.25rem; background: var(--card); }
.toc ul { margin: .25rem 0; }

.note {
  border-left: 3px solid var(--accent);
  padding: .5rem 1rem;
  background: var(--card);
  border-radius: 0 8px 8px 0;
}

.button {
  display: inline-block;
  background: var(--accent);
  color: var(--bg);
  padding: .6rem 1.1rem;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
}

pre {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: .75rem 1rem;
  white-space: pre-wrap;
  font-size: .9rem;
}

footer {
  padding-top: 1.5rem;
  padding-bottom: 2.5rem;
  color: var(--muted);
  font-size: .875rem;
  border-top: 1px solid var(--rule);
}
footer p { margin: .25rem 0; }
footer a { color: var(--muted); }