:root {
  --bg: #ffffff;
  --ink: #1c1c1c;
  --muted: #6b6b6b;
  --line: #ececec;
  --chip: #f2f2f2;
  --accent: #e3262b;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121212;
    --ink: #f2f2f2;
    --muted: #a3a3a3;
    --line: #2a2a2a;
    --chip: #1f1f1f;
    --accent: #ff4a4f;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 720px; margin: 0 auto; padding: 0 16px 64px; }

header.site {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  margin-bottom: 40px;
}

.brand { display: flex; align-items: center; gap: 10px; color: inherit; text-decoration: none; font-weight: 800; font-size: 18px; }
.brand img { width: 36px; height: 36px; border-radius: 9px; }

nav a { color: var(--muted); text-decoration: none; font-weight: 700; font-size: 15px; margin-left: 16px; }
nav a:hover, nav a[aria-current='page'] { color: var(--ink); }

h1 { font-size: 34px; line-height: 1.15; font-weight: 800; margin: 0 0 8px; letter-spacing: -0.01em; }
h2 { font-size: 21px; font-weight: 800; margin: 36px 0 8px; }
h3 { font-size: 17px; font-weight: 800; margin: 24px 0 4px; }
p, li { color: var(--ink); }
.lede { font-size: 19px; color: var(--muted); margin: 0 0 24px; }
.updated { color: var(--muted); font-size: 14px; margin: 0 0 32px; }
a { color: var(--accent); }
ul { padding-left: 22px; }

.hero { text-align: center; padding: 24px 0 8px; }
.hero img { width: 120px; height: 120px; border-radius: 28px; box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12); }
.hero h1 { margin-top: 24px; font-size: 40px; }

.card { background: var(--chip); border-radius: 18px; padding: 18px 20px; margin: 16px 0; }
.card p { margin: 4px 0 0; }

footer.site { border-top: 1px solid var(--line); margin-top: 56px; padding-top: 20px; color: var(--muted); font-size: 14px; }
footer.site a { color: var(--muted); }

@media (max-width: 480px) {
  h1 { font-size: 28px; }
  .hero h1 { font-size: 32px; }
  nav a { margin-left: 12px; font-size: 14px; }
}