/* Heroセクション */
/*
.hero {
  background: var(--sub-color);
  text-align: center;
  padding: 60px 20px;
}
*/
.hero {
  position: relative;
  height: 400px; /* 後で100vhに変更も可能 */
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity 1s ease-in-out;
  z-index: 0;
}

.hero-bg1 {
  z-index: 0;
}

.hero-bg2 {
  z-index: 0;
}

.hero-overlay {
  position: relative;
  z-index: 1; /* 背景の上に文字を重ねる */
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  color: white;
  padding: 60px 20px;
}

.hero h2 {
  margin: 0 0 10px;
  font-size: 1.8rem;
  color: var(--main-color);
}

.hero {
  position: relative;
  background: url("top-03.jpg") center/cover no-repeat;
  height: 60vh; /* 画面の高さの60% */
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-overlay {
  background: rgba(0, 0, 0, 0.4); /* 半透明で文字が読みやすい */
  padding: 20px 40px;
  border-radius: 8px;
  text-align: center;
  color: white;
}

.hero h1 {
  font-size: 32px;
  margin: 0 0 10px;
}
.hero p {
  font-size: 18px;
  margin: 0;
}

/* 提供の文言のdiv */
.hero-credit {
  position: absolute;
  bottom: 20px;
  right: 20px;
  z-index: 1;
  background: rgba(0, 0, 0, 0.6);
  color: white;
  padding: 8px 16px;
  border-radius: 4px;
  font-size: 14px;
  opacity: 0;
  transition: opacity 0.5s ease-in-out;
  pointer-events: none;
}

.hero-credit.show {
  opacity: 1;
}


/* INFORMATION */
.news h2 {
  border-left: 5px solid var(--main-color);
  padding-left: 10px;
}

/*更新履歴*/
.changelog-dl{
  margin: 2em auto;
}

.changelog-dl dt{
  color: gray;
  border-bottom: 1px solid silver;
  margin-top: 0.5em;
}


/* 主要リンク（カード表記） */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  /*  margin: 40px 0;*/
}
.feature-card {
  border: 1px solid #ddd;
  padding: 20px;
  border-radius: 6px;
  background: #fff;
}
.feature-card h3 {
  color: var(--main-color);
}