body {
  background: linear-gradient(160deg, #1a0000, #4B0000, #800000);
  min-height: 100vh;
  margin: 0;
}

h2 {
  color: gold;
  letter-spacing: 4px;
  text-align: center;
  font-family: 'Yu Mincho Medium';
  font-size: 2em;
  text-shadow: 0 0 10px rgba(255, 200, 0, 0.6); /* 金色の光彩 */
  padding: 1em 0;
  border-bottom: 1px solid rgba(255, 215, 0, 0.3);
  border-top: 1px solid rgba(255, 215, 0, 0.3);
  margin: 1.5em auto;
  width: 80%;
}

table {
  margin: 0 auto;
  border-collapse: collapse;
  width: 80%;
  border: 1px solid rgba(255, 215, 0, 0.3); /* 表全体を金枠で囲む */
}

th {
  background: rgba(0, 0, 0, 0.6);
  color: gold;
  font-family: 'Yu Mincho Medium';
  border-right: 1px solid rgba(255, 215, 0, 0.5);
  width: 40%;
}

td {
  text-align: center;
  color: #ddd;
  background-color: rgba(0, 0, 0, 0.4);
  font-family: 'Yu Mincho Medium';
}

th, td {
  padding: 14px 24px;
}

tr {
  border-bottom: 1px solid rgba(255, 215, 0, 0.2);
  border-left: 4px solid darkred;
}

tr:hover th,
tr:hover td {
  background-color: rgba(139, 0, 0, 0.6); /* 赤系ホバーに変更 */
  color: gold;
  transition: 0.2s;
}