*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  line-height: 1.6;
  color: #1a1a1a;
  background: #fafafa;
}

header {
  border-bottom: 1px solid #ccc;
  background: #fff;
  padding: 1rem 1.5rem;
}

header h1 {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 600;
}

nav {
  margin-top: 0.5rem;
  font-size: 0.95rem;
}

nav a {
  color: #2a4a7a;
  margin-right: 1rem;
}

main {
  max-width: 42rem;
  margin: 0 auto;
  padding: 1.5rem;
  background: #fff;
  min-height: calc(100vh - 8rem);
}

footer {
  max-width: 42rem;
  margin: 0 auto;
  padding: 1rem 1.5rem 2rem;
  font-size: 0.85rem;
  color: #555;
}

h2 {
  font-size: 1.15rem;
  margin-top: 1.75rem;
  margin-bottom: 0.5rem;
}

h3 {
  font-size: 1rem;
  margin-top: 1.25rem;
  margin-bottom: 0.35rem;
}

p,
ul {
  margin: 0 0 1rem;
}

ul {
  padding-left: 1.25rem;
}

code,
pre {
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 0.9em;
}

pre {
  background: #f4f4f4;
  border: 1px solid #e0e0e0;
  padding: 0.75rem 1rem;
  white-space: pre-wrap;
  overflow-wrap: break-word;
}

a {
  color: #2a4a7a;
}

a:hover {
  text-decoration: none;
}

.concept-label {
  font-weight: 600;
}

.review-pattern {
  margin: 1.5rem 0;
  padding: 1rem 1.25rem;
  background: #f2f2f2;
  border: 1px solid #d8d8d8;
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 600;
  line-height: 1.6;
  white-space: normal;
  overflow-wrap: anywhere;
}