body {
  background: #222;
  color: #eee;
  min-height: 100vh;
  margin: 0;
}

.markdown-body {
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* ページタイトル余白 */
h1 {
  margin-top: 60px;
  margin-bottom: 2em;
  text-align: center;
  font-size: 2rem;
  letter-spacing: 0.1em;
}

/* テーブル中央寄せ＆見やすく */
table {
  margin: 0 auto 48px auto; /* 中央＋下に余白 */
  width: 90vw;
  max-width: 800px;
  border-collapse: collapse;
  font-size: 1.1em;
  background: #262d36;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 6px 24px rgba(0,0,0,0.13);
}
th, td {
  border: 1px solid #555;
  padding: 0.5em 1em;
  text-align: left;
}
th {
  background: #444;
  color: #fff;
}
tr:nth-child(even) td {
  background: #333;
}
tr:nth-child(odd) td {
  background: #222;
}
td:first-child {
  white-space: nowrap;
}

.footer-copyright {
  text-align: center;
  color: #888;
  font-size: 1em;
  margin-top: 4em;
  margin-bottom: 1.5em;
  letter-spacing: 0.05em;
  user-select: none;
}