main{
  overflow-y: auto;
}

/* ようこそ */
.welcome {text-align : center;}

/* 新着情報 */
.news {
  background-color: #fff;
  padding: 0.3rem;
  border-radius: 6px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  text-align: left;
  width :90%;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.news h2 {
  font-size: 1.2rem;
  padding-bottom: 0.5rem;
  margin-bottom: 1rem;
}

#newsList {
  display: flex;
  flex-direction: column;
  gap: 1em; 
}

.news-item {
  display: flex;
  border-top: 1px solid #ccc;
  padding-bottom: 0.5em;
}

.news-date {
  width: 120px;
  font-weight: bold;
  color: #333;
  flex-shrink: 0;
}

.news-message {
  flex-grow: 1;
  color: #444;
  line-height: 1.5;
}

/* 紹介動画 */
.main-content {
  padding: 1rem;
  background-color: #fff;
  margin: 1rem;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.video-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  justify-content: center;
}

.video-item {
  flex: 1 1 45%;
  max-width: 600px;
  min-width: 300px;
}

.video-title {
  font-size: 1.1rem;
  font-weight: bold;
  margin-bottom: 0.5rem;
  text-align: center;
}

.video-container {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 */
  height: 0;
  overflow: hidden;
  width: 100%;
}

.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

@media (max-width: 768px) {
  .video-grid {
    flex-direction: column;
    align-items: center;
  }

  .video-item {
    flex: 1 1 100%;
  }
}