:root {
  color: #0f172a;
  background: #fff;
  font-family: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", system-ui, sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* {
  box-sizing: border-box;
}

body {
  min-width: 320px;
  margin: 0;
  color: #0f172a;
  background: #fff;
  line-height: 1.6;
}

header {
  border-bottom: 1px solid #e2e8f0;
  background: #f8fafc;
}

header > div,
main,
footer > div {
  width: min(100% - 2rem, 48rem);
  margin-inline: auto;
}

header > div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1rem;
}

header > div > a {
  color: #0f172a;
  font-weight: 700;
  white-space: nowrap;
}

nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: .5rem 1rem;
  font-size: .875rem;
}

main {
  padding-block: 2.5rem;
}

h1 {
  margin: 2rem 0 1rem;
  font-size: clamp(1.875rem, 7vw, 2.25rem);
  line-height: 1.15;
}

h2 {
  margin: 2rem 0 .75rem;
  font-size: 1.5rem;
  line-height: 1.25;
}

h3 {
  margin: 1.5rem 0 .5rem;
  font-size: 1.25rem;
  line-height: 1.3;
}

p,
ul,
ol {
  margin-block: .75rem;
}

ul,
ol {
  padding-left: 1.5rem;
}

li {
  margin-block: .25rem;
}

a {
  color: #0369a1;
  text-underline-offset: .15em;
  word-break: break-word;
}

a:hover,
a:focus-visible {
  color: #0c4a6e;
}

a:focus-visible {
  outline: 3px solid #facc15;
  outline-offset: 3px;
}

blockquote {
  margin: 1.5rem 0;
  padding: 1rem;
  border-left: 4px solid #fbbf24;
  color: #78350f;
  background: #fffbeb;
}

code {
  padding: .1em .3em;
  border-radius: .25rem;
  background: #f1f5f9;
}

hr {
  margin-block: 2rem;
  border: 0;
  border-top: 1px solid #e2e8f0;
}

footer {
  margin-top: 3rem;
  border-top: 1px solid #e2e8f0;
  color: #64748b;
}

footer > div {
  display: flex;
  justify-content: space-between;
  gap: .5rem 1rem;
  padding-block: 1.5rem;
  font-size: .875rem;
}

@media (max-width: 640px) {
  header > div {
    align-items: flex-start;
    flex-direction: column;
  }

  nav {
    justify-content: flex-start;
  }

  footer > div {
    flex-direction: column;
  }
}