:root {
  --green: #1a9d6f;
  --green-dark: #157857;
  --ink: #1f2628;
  --muted: #5b6770;
  --bg: #f6f4ee;
  --card: #ffffff;
  --border: #e3e0d8;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: 'Newsreader', Georgia, 'Times New Roman', serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  font-size: 18px;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.wrap {
  max-width: 780px;
  margin: 0 auto;
  padding: 28px 22px 80px;
}

header.site {
  background: #ffffff;
  border-bottom: 1px solid var(--border);
  padding: 22px 22px 26px;
  text-align: center;
}

header.site .tree {
  display: block;
  margin: 0 auto 6px;
  height: 56px;
  width: auto;
}

header.site .wordmark {
  display: block;
  margin: 0 auto;
  height: 42px;
  width: auto;
}

header.site .tagline {
  font-size: 14px;
  color: var(--muted);
  margin-top: 10px;
  font-style: italic;
}

h1 {
  font-size: 34px;
  line-height: 1.25;
  margin: 10px 0 4px;
  color: var(--green-dark);
  font-weight: 700;
  letter-spacing: -0.01em;
}

h2 {
  font-size: 24px;
  margin: 40px 0 12px;
  color: var(--green-dark);
  border-bottom: 2px solid var(--border);
  padding-bottom: 8px;
  font-weight: 600;
}

h3 {
  font-size: 19px;
  margin: 26px 0 10px;
  color: var(--ink);
  font-weight: 600;
}

p { margin: 12px 0; }

a {
  color: var(--green-dark);
  text-decoration: underline;
  text-decoration-color: rgba(21, 120, 87, 0.35);
  text-underline-offset: 2px;
}
a:hover { text-decoration-color: var(--green-dark); }

ul, ol { padding-left: 24px; }
li { margin: 6px 0; }

.meta {
  color: var(--muted);
  font-size: 15px;
  margin: 4px 0 26px;
}

blockquote {
  margin: 20px 0;
  padding: 16px 20px;
  background: #ecf6f1;
  border-left: 4px solid var(--green);
  border-radius: 8px;
}

blockquote p { margin: 6px 0; }

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 36px 0;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 32px 34px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.02);
}

.home-links {
  list-style: none;
  padding: 0;
  margin: 28px 0 0;
}

.home-links li { margin: 14px 0; }

.home-links a {
  display: block;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  text-decoration: none;
  color: var(--ink);
  font-weight: 600;
  font-size: 19px;
  transition: border-color .15s, transform .15s;
}

.home-links a:hover {
  border-color: var(--green);
  transform: translateY(-1px);
}

.home-links span {
  display: block;
  font-weight: 400;
  font-size: 15px;
  color: var(--muted);
  margin-top: 6px;
}

.back {
  display: inline-block;
  margin-bottom: 18px;
  font-size: 15px;
  text-decoration: none;
  color: var(--green-dark);
}
.back:hover { text-decoration: underline; }

footer.site {
  text-align: center;
  color: var(--muted);
  font-size: 14px;
  padding: 28px 22px 40px;
  font-style: italic;
}

footer.site a { color: var(--green-dark); }

.callout {
  background: #ecf6f1;
  border: 1px solid #cce4d8;
  border-radius: 10px;
  padding: 18px 22px;
  margin: 22px 0;
}

code {
  background: #efece4;
  padding: 1px 6px;
  border-radius: 4px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 14px;
}

@media (max-width: 520px) {
  body { font-size: 17px; }
  .wrap { padding: 22px 16px 60px; }
  .card { padding: 22px 20px; border-radius: 10px; }
  h1 { font-size: 28px; }
  h2 { font-size: 21px; }
  header.site .wordmark { height: 36px; }
  header.site .tree { height: 48px; }
}