body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image: url("../img/sircle.jpg");
  background-size: cover;
  background-position: top center;
  background-repeat: no-repeat;
  pointer-events: none;
}

body {
  font-family: sans-serif;
  margin: 0;
  padding: 20px;
}

main {
  max-width: 800px;
  margin: 0 auto;
  background-color: rgba(255, 255, 255, 0.9);
  padding: 40px;
  border-radius: 2px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

h1 {
  color: #172e59;
  font-size: 2rem;
  margin-top: 0;
  margin-bottom: 20px;
}

p {
  color: #333;
  line-height: 1.8;
  margin-bottom: 30px;
}
a {
  color: #626be5;
  text-decoration: none;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 20px;
}

table th,
table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid #e7e9ee;
  color: #333;
}

table th {
  background-color: #f5f5f5;
  color: #172e59;
  font-weight: 900;
}

/* フェードイン効果 */
main.fade-in {
  opacity: 0;
  transition: opacity 1s ease-in-out;
}

main.fade-in.loaded {
  opacity: 1;
}