/*-------------------------------------
  導入事例セクション全体
-------------------------------------*/
.case-top-section {
  background-color: var(--color-bg-alt);
  padding: 80px 20px;
}

.case-container {
  max-width: 1200px;
  margin: 0 auto;
}

.case-top-section .case-title {
  font-size: 2rem;
  font-weight: bold;
  text-align: center;
  color: var(--color-text);
  margin-bottom: 2.5rem;
}

/*-------------------------------------
  カードグリッドレイアウト
-------------------------------------*/
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.case-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  overflow: hidden;
  background-color: var(--color-white);
  box-sizing: border-box;
  transition: box-shadow 0.3s ease;
}

.case-card:hover {
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.12);
}

/*-------------------------------------
  サムネイル（画像）
-------------------------------------*/
.case-thumbnail {
  position: relative;
  width: 100%;
  height: 180px;
  overflow: hidden;
}

.case-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.case-thumbnail a {
  display: block;
  overflow: hidden;
}

.case-thumbnail a img {
  transition: transform 0.3s ease;
}

.case-thumbnail a:hover img {
  transform: scale(1.05);
}

/*-------------------------------------
  カード本文
-------------------------------------*/
.case-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.case-heading {
  font-size: 1rem;
  font-weight: bold;
  margin: 0 0 0.5em 0;
  color: var(--color-text);
}

.case-company,
.case-count {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin: 0;
}

.case-link {
  margin-top: auto;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
}

.case-link:hover {
  text-decoration: underline;
}

/*-------------------------------------
  タイトルホバーアニメーション
-------------------------------------*/
.case-title-link {
  color: inherit;
  text-decoration: none;
  transition: color 0.3s ease, text-decoration 0.3s ease;
}

.case-title-link:hover {
  color: var(--color-link-hover);
  text-decoration: underline;
}

/*-------------------------------------
  もっと見るボタン
-------------------------------------*/
.case-more-button {
  text-align: center;
  margin-top: 2rem;
}

.case-more-button .button {
  display: inline-block;
  padding: 0.75rem 2rem;
  background-color: var(--color-primary);
  color: var(--color-white);
  text-decoration: none;
  border-radius: 6px;
  font-weight: bold;
  transition: background-color 0.3s ease;
}

.case-more-button .button:hover {
  background-color: var(--color-primary-dark);
}

/*-------------------------------------
  レスポンシブ対応
-------------------------------------*/

/* --- タブレット --- */
@media (max-width: 1024px) {
  .case-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .case-thumbnail {
    height: 160px;
  }

  .case-heading {
    font-size: 0.95rem;
  }
}

/* --- スマホ --- */
@media (max-width: 640px) {
  .case-top-section {
    padding: 60px 1rem;
  }

  .case-container {
    padding: 0 1rem;
  }

  .case-top-section .case-title {
    font-size: 1.5rem;
    margin-bottom: 2rem;
  }

  .case-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .case-card {
    border-radius: 10px;
  }

  .case-thumbnail {
    height: 160px;
  }

  .case-body {
    padding: 16px;
  }

  .case-heading {
    font-size: 1rem;
  }

  .case-company,
  .case-count {
    font-size: 0.8rem;
  }

  .case-link {
    font-size: 0.85rem;
  }

  .case-more-button {
    margin-top: 1.5rem;
  }

  .case-more-button .button {
    width: 100%;
    max-width: 300px;
    font-size: 1rem;
  }
}