:root {
  --text: #111111;
  --dim: #828282;
  --bg: #fdfdfd;
  --rule: #e8e8e8;
  --accent: #2a7ae2;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

.wrap {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 30px;
}

header {
  border-top: 5px solid #424242;
  border-bottom: 1px solid var(--rule);
  padding: 1rem 0;
}

header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
}

.site-title {
  font-size: 1.625rem;
  font-weight: 300;
  color: var(--text);
  text-decoration: none;
}

nav {
  display: flex;
  gap: 1.25rem;
}

nav a {
  color: var(--text);
  text-decoration: none;
  font-size: 0.95rem;
}

nav a:hover,
nav a:focus-visible {
  color: var(--accent);
}

main .wrap {
  padding-top: 2.5rem;
  padding-bottom: 4rem;
}

h1 { font-size: 1.75rem; margin: 0 0 0.5rem; }

h2 {
  font-size: 1.375rem;
  margin-top: 2.5rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--rule);
}

h3 { font-size: 1.125rem; margin-top: 1.5rem; }

p { margin: 0 0 1rem; }

a { color: var(--accent); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

@media (max-width: 600px) {
  .wrap { padding: 0 20px; }
  header .wrap { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
  main .wrap { padding-top: 2rem; }
}