/* ===== トップページ：スライド（安全版） ===== */

.slideshow-container img {
  width: 100%;
  display: block;
  border-radius: 6px;
}

/* オーバーレイ */
.slideshow-container .overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-end;
  padding: 8%;
  pointer-events: none;
}

.slideshow-container .overlay-inner {
  color: #fff;
  font-size: 1.9rem;
  font-weight: 600;
  line-height: 1.3;
  text-shadow: 0 2px 8px rgba(0,0,0,.6);
}

/* ===== 横スライド＋フェード ===== */

.slideshow-container {
  max-width: 1200px;
  height: 480px;
  margin: 1.5rem auto;
  overflow: hidden;
  position: relative;
}

/* スライドを本文幅制約から外す */
.slideshow-container {
  max-width: none;     /* 制限解除 */
  width: 92vw;         /* 画面幅の 92% を使用 */
  margin: 1.5rem auto; /* 常に中央 */
}

/* ===== トップスライド：横幅の最終調整 ===== */
.slideshow-container {
  width: min(96vw, 960px);  /* ★ 画面追従しつつ上限を設定 */
  height: 540px;
  margin: 1.5rem auto;      /* ★ 常に中央寄せ */
  overflow: hidden;
  position: relative;
}


/* 画面幅いっぱいにしたい場合 */
/*
.slideshow-container {
  max-width: none;
  width: 100vw;
  margin-left: calc(50% - 50vw);
}
*/

/* .slideshow-container::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(
    ellipse at center,
    rgba(0,0,0,0) 60%,
    rgba(0,0,0,0.25) 100%
  );
} */

.slides-track {
  display: flex;
  height: 100%;
  transition: transform 0.8s ease-in-out;
}

.slide {
  width: 100%;
  height: 100%;
  flex-shrink: 0;
  position: relative;
  opacity: 0.4;
  transform: scale(0.985);     /* ← わずかに小さく */
  transition: opacity 0.8s ease-in-out, transform 0.8s ease-in-out;
}

/* 表示中スライドのみ可視 */
.slide.is-active {
  opacity: 1;
  transform: scale(1);
}

/* 表示中スライドを強調 */
/*
.slides-track .slide:nth-child(1) {
  opacity: 1;
  transform: scale(1);
}
*/

.slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: 6px;
}

/* ===== オーバーレイ ===== */

.slide .overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-end;
  padding: 8%;
  pointer-events: none;
}

.slide .overlay-inner {
  color: #fff;
  font-size: 1.9rem;
  font-weight: 600;
  line-height: 1.3;
  text-shadow: 0 2px 8px rgba(0,0,0,.6);
}

.slide .overlay-inner span {
  font-size: 1.1rem;
  font-weight: 400;
}

@media screen and (max-width: 768px) {
  .slideshow-container {
    height: 360px;
  }
}

@media screen and (max-width: 480px) {
  .slideshow-container {
    height: 260px;
  }

  /* ===== モバイル最適化 ===== */
  .slideshow-container {
    height: 56vw;   /* 16:9 比率を維持 */
    margin: 1rem auto;
  }

}

/* ===== ヘッダーを常に最前面に ===== */

.site-header {
  position: relative;
  z-index: 1000;
}

/* スライドはそれより下 */
.slideshow-container {
  position: relative;
  z-index: 1;
}


/* ===== Research page: card grid ===== */

.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 2rem;
}

.research-card {
  background: #ffffff;
  border: 1px solid #e5e5e5;
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.research-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 18px rgba(0,0,0,0.08);
}

.research-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  display: block;
}

.research-card h3 {
  font-size: 1.1rem;
  margin: 0.8rem 1rem 0.4rem;
}

.research-card p {
  font-size: 0.95rem;
  margin: 0 1rem 0.8rem;
  line-height: 1.5;
}

.research-card .tags {
  margin: 0 1rem 1rem;
}

/* =========================
   Research Tag Design
   ========================= */

.tag {
  display: inline-block;
  font-size: 0.75rem;
  padding: 3px 10px;
  margin: 3px 6px 0 0;
  border-radius: 14px;
  font-weight: 500;
  letter-spacing: 0.02em;
  border: 1px solid rgba(0,0,0,0.05);
  transition: background-color 0.2s ease, color 0.2s ease;
}

/* ===== 技術軸（青） ===== */

.tag.tech {
  background-color: #e3f0ff;
  color: #0b4fa2;
}

/* ===== 応用分野（産業）緑 ===== */

.tag.industry {
  background-color: #e6f6ea;
  color: #1b7a3a;
}

/* ===== 応用分野（生活支援）オレンジ ===== */

.tag.life {
  background-color: #fff1e6;
  color: #b55300;
}

/* 軽いホバー効果（任意） */
.tag:hover {
  opacity: 0.85;
}