:root {
  --text: #111111;
  --muted: #555555;
  --border: #d9d9d9;
  --background: #ffffff;
  --link: #111111;
  --max-width: 860px;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  color: var(--text);
  background: var(--background);
  line-height: 1.65;
}

.wrapper {
  width: min(100% - 2rem, var(--max-width));
  margin: 0 auto;
}

.site-header {
  padding: 2rem 0 1rem;
  border-bottom: 1px solid var(--border);
}

.site-title {
  display: inline-block;
  color: var(--text);
  text-decoration: none;
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.site-subtitle {
  margin: 0.35rem 0 0;
  color: var(--muted);
  font-size: 0.98rem;
}

.site-nav {
  margin-top: 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem 1.2rem;
}

.site-nav a {
  color: var(--link);
  text-decoration: none;
  padding-bottom: 0.15rem;
  border-bottom: 1px solid transparent;
}

.site-nav a.active,
.site-nav a:hover {
  border-color: var(--text);
}

.document-page {
  padding: 2rem 0 4rem;
}

.narrow-page {
  max-width: 700px;
}

.hero {
  padding-top: 0.25rem;
}

h1,
h2,
h3 {
  line-height: 1.25;
  font-weight: 700;
}

h1 {
  font-size: 2.3rem;
  margin: 0 0 1rem;
}

h2 {
  font-size: 1.25rem;
  margin: 2.4rem 0 0.85rem;
}

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

.lead {
  font-size: 1.12rem;
  color: var(--text);
  max-width: 52rem;
}

ul,
ol {
  padding-left: 1.4rem;
}

li + li {
  margin-top: 0.35rem;
}

a {
  color: var(--link);
}

.link-list {
  list-style: none;
  padding-left: 0;
}

.link-list li {
  margin-bottom: 0.5rem;
}

.ascii-diagram {
  overflow-x: auto;
  padding: 1rem;
  border: 1px solid var(--border);
  background: #fafafa;
  font-family: "Courier New", monospace;
  line-height: 1.35;
}

.checklist p {
  margin-bottom: 0.75rem;
}

.contact-form {
  margin-top: 1.5rem;
}

.contact-form label {
  display: block;
  margin: 1rem 0 0.35rem;
  font-weight: 600;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.8rem;
  border: 1px solid var(--border);
  border-radius: 0;
  font: inherit;
  color: var(--text);
  background: #fff;
}

.contact-form button {
  margin-top: 1rem;
  padding: 0.75rem 1.2rem;
  border: 1px solid var(--text);
  background: #fff;
  color: var(--text);
  font: inherit;
  cursor: pointer;
}

.contact-form button:hover {
  background: #f5f5f5;
}

.form-note {
  margin-top: 1rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0 3rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer p {
  margin: 0.2rem 0;
}

@media (max-width: 640px) {
  html {
    font-size: 15px;
  }

  h1 {
    font-size: 1.9rem;
  }

  .site-nav {
    gap: 0.65rem 1rem;
  }
}