:root {
  --green: #3f6b3a;
  --green-light: #e9f1e4;
  --text: #2c2c27;
  --muted: #7c7c70;
  --line: #dcdcd0;
  --bg: #fbfaf5;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
}

main,
header.site-header,
footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 20px;
}

header.site-header {
  padding-top: 48px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.site-title {
  margin: 0;
  font-size: 30px;
  font-weight: 700;
}

.site-title a {
  color: var(--green);
  text-decoration: none;
}

.site-subtitle {
  margin: 4px 0 20px;
  color: var(--muted);
  font-size: 15px;
}

.intro {
  margin-top: 32px;
}

.heading {
  font-size: 22px;
  margin-top: 40px;
  color: var(--green);
}

.post-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
}

.post-list li {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.post-list a {
  color: var(--text);
  font-weight: 600;
  font-size: 18px;
  text-decoration: none;
}

.post-list a:hover {
  color: var(--green);
}

.post-list time {
  color: var(--muted);
  font-size: 14px;
}

article h1 {
  font-size: 27px;
  line-height: 1.3;
  margin: 40px 0 6px;
}

article .meta {
  color: var(--muted);
  font-size: 14px;
  margin: 0 0 28px;
}

article h2 {
  font-size: 20px;
  margin-top: 36px;
  color: var(--green);
}

article p {
  margin: 14px 0;
}

article ul,
article ol {
  padding-left: 24px;
  margin: 14px 0;
}

article li {
  margin: 6px 0;
}

article table {
  border-collapse: collapse;
  width: 100%;
  margin: 18px 0;
  font-size: 15px;
}

article th,
article td {
  border: 1px solid var(--line);
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
}

article th {
  background: var(--green-light);
}

article .tip {
  background: var(--green-light);
  border-left: 4px solid var(--green);
  padding: 10px 14px;
  margin: 18px 0;
  border-radius: 0 6px 6px 0;
}

.backlink {
  display: inline-block;
  margin-top: 40px;
  color: var(--green);
  text-decoration: none;
}

.backlink:hover {
  text-decoration: underline;
}

footer {
  margin-top: 64px;
  padding-top: 18px;
  padding-bottom: 40px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}