body, html {
  margin: 0;
  padding: 0;
  font-family: 'Helvetica Neue', sans-serif;
  color: #333;
}

.background {
  background-image: url('../picture/haikei.jpg');
  background-size: cover;
  background-position: center;
  position: fixed;
  width: 100%;
  height: 100%;
  top: 0; left: 0;
  z-index: -1;
}

.container {
  background-color: rgba(255, 255, 255, 0.85); /* 半透明白 */
  backdrop-filter: blur(4px); /* 背景ぼかし効果 */
  border-radius: 16px;
  max-width: 700px;
  margin: 2rem auto;
  padding: 2rem;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

.header {
  text-align: center;
}

.icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 1rem;
}

.sub {
  font-size: 0.9rem;
  color: #777;
}

h1 {
  margin: 0.2rem 0;
}

.description ul {
  padding-left: 1.5rem;
}

.links {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.link-card {
  display: block;
  padding: 1rem;
  background-color: #fff;
  border-radius: 12px;
  text-decoration: none;
  color: #333;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  transition: transform 0.2s;
}

.link-card:hover {
  transform: scale(1.02);
}

.link-card span {
  display: block;
  font-size: 0.85rem;
  color: #666;
}