:root {
  --paper: #f4f1ec;
  --ink: #2b2a28;
  --green: #3e6b5a;
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic",
    "Noto Sans JP", sans-serif;
  line-height: 1.8;
}

.wrap {
  max-width: 680px;
  margin: 0 auto;
  padding: 32px 20px 80px;
}

header.site {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 680px;
  margin: 0 auto;
  padding: 20px 20px 0;
}

.brand {
  color: var(--green);
  font-weight: 700;
  font-size: 18px;
  text-decoration: none;
}

nav.site a {
  color: var(--ink);
  text-decoration: none;
  margin-left: 16px;
  font-size: 14px;
  opacity: 0.8;
}

nav.site a:hover {
  opacity: 1;
  text-decoration: underline;
}

h1 {
  font-size: 26px;
  margin-top: 8px;
  margin-bottom: 4px;
}

h2 {
  font-size: 18px;
  margin-top: 36px;
  margin-bottom: 8px;
  color: var(--green);
}

p {
  margin: 12px 0;
}

.meta {
  font-size: 14px;
  opacity: 0.7;
  margin-bottom: 24px;
}

.card {
  background: #fff;
  border-radius: var(--radius);
  padding: 24px;
  margin: 20px 0;
  box-shadow: 0 1px 3px rgba(43, 42, 40, 0.08);
}

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

.badge {
  display: inline-block;
  background: rgba(62, 107, 90, 0.12);
  color: var(--green);
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 13px;
  margin: 4px 8px 4px 0;
}

footer {
  max-width: 680px;
  margin: 40px auto 0;
  padding: 20px;
  font-size: 13px;
  opacity: 0.6;
  text-align: center;
}

ul {
  padding-left: 1.2em;
}

@media (max-width: 480px) {
  h1 {
    font-size: 22px;
  }
  .wrap {
    padding: 24px 16px 60px;
  }
}