* {
  box-sizing: border-box;
}

body {
  font-family: system-ui, sans-serif;
  max-width: 640px;
  margin: 0 auto;
  padding: 2rem 1.25rem;
  line-height: 1.6;
  color: #222;
  background: #fff;
}

h1 {
  font-size: 1.75rem;
  letter-spacing: 0.05em;
}

img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  margin: 1.5rem 0;
}

nav {
  margin-bottom: 2rem;
  font-size: 0.95rem;
}

nav a {
  color: #222;
  text-decoration: none;
  border-bottom: 1px solid #999;
}

nav a:hover {
  border-bottom-color: #222;
}

a {
  color: #0b5fa5;
}

footer {
  margin-top: 3rem;
  font-size: 0.85rem;
  color: #777;
}