@charset "utf-8";
/* ベース */
* {
  padding: 0;
  box-sizing: border-box;
}
body {
  background: #282828;
  color: #fff;
  font-family: sans-serif;
  padding: 0 20px;
}
h1 {
  margin-bottom: 0;
}
h2 {
  margin-top: 0;
}
.wrapper {
  width: 99%;
  max-width: 1000px;
  margin: 0 auto;
}
#main {
  background: #fff;
  color: #000;
  padding: 30px;
  border-radius: 6px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
}
p {
  font-size: 14px;
}
/* タイトル */
.gallery_title {
  font-size: 20px;
  font-weight: bold;
  margin-bottom: 25px;
}
.gallery_title span {
  font-weight: normal;
  color: #666;
}
/* メイン3枚 */
.main_gallery {
  display: flex;
  gap: 10px;
  margin-bottom: 10px;
}
.main_img {
  flex: 1;
  overflow: hidden;
  border-radius: 4px;
}
.main_img img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.3s ease;
}
.main_img img:hover {
  transform: scale(1.05);
}
/* サブ10枚 */
.sub_gallery {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.img_list {
  flex: 0 0 calc(10% - 9px); /* 10枚並べる */
  border-radius: 3px;
  overflow: hidden;
}
.img_list img {
  width: 100%;
  height: auto;
  display: block;
  transition: opacity 0.3s;
}
.img_list img:hover {
  opacity: 0.8;
}
/* 閉じる */
.close {
  margin-top: 30px;
}
/* レスポンシブ対応 */
@media (max-width: 768px) {
  .main_gallery {
    flex-direction: column;
  }
  .img_list {
    flex: 0 0 calc(20% - 8px); /* 小画面では5枚並び */
  }
}