/* =========================
   Research page
   ========================= */

   /* コンテンツ全体の幅と中央寄せ */
   .contents {
    max-width: 900px;
    margin: 0 auto;
  }
  
/* セクションの余白 */
  section {
    margin-bottom: 64px;
  }
  
/* 見出しのスタイル */
  section h2 {
    font-size: 1.8rem;
    margin-bottom: 24px;
    border-bottom: 2px solid #e5e7eb;
    padding-bottom: 8px;
  }
  
  section h3 {
    font-size: 1.3rem;
    margin: 32px 0 16px;
    color: #374151;
  }
  
  /* paper list */
  .paper-list {
    list-style: none;
    padding: 0;
    margin: 0;
  }
  
  .paper-list li {
    background: #f9fafb;
    border-radius: 12px;
    padding: 20px 24px;
    margin-bottom: 20px;
    line-height: 1.7;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
  }
  
  /* author emphasis */
  .paper-list b u {
    text-decoration: none;
    border-bottom: 2px solid #60a5fa;
    padding-bottom: 2px;
  }
  
/* research page links (paper / achievements / qualifications) */
.paper-list a,
section ul:not(.paper-list) a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 8px;
  text-decoration: none;
  font-weight: 500;
  color: #2563eb;
}

.paper-list a:hover,
section ul:not(.paper-list) a:hover {
  text-decoration: underline;
}

  
  /* icons */
  .icon_link,
  .pdf_icon,
  .link_icon {
    width: 18px;
    height: 18px;
  }
  
  /* other lists */
  section ul:not(.paper-list) {
    padding-left: 20px;
  }
  
  section ul:not(.paper-list) li {
    margin-bottom: 8px;
  }
  
  /* qualification / achievement links */
  section li a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-left: 6px;
  }
  
  /* responsive */
  @media (max-width: 640px) {
    .paper-list li {
      padding: 16px;
    }
  
    section h2 {
      font-size: 1.5rem;
    }
  }

/* 共通カードデザイン */
.paper-card, .achievement-card, .qualification-card, .ta-card, .activity-card {
  background-color: #f9f9f9;
  border: 1px solid #ddd;
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 16px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* リンクのスタイル */
.paper-link, .achievement-link {
  display: inline-flex;
  align-items: center;
  font-size: 14px;
  color: #007bff;
  text-decoration: none;
}

.paper-link:hover, .achievement-link:hover {
  text-decoration: underline;
  color: #0056b3;
}

.icon_link, .pdf_icon {
  width: 16px;
  height: 16px;
  margin-right: 8px;
}