/* ===================================================
   論文ページ 完全版スタイル
=================================================== */

/* ================= 全体レイアウト ================= */

#paper-container {
  max-width: 1100px;
  margin: 40px auto 60px;
  padding: 0 24px;
}

/* ================= ページタイトル ================= */

#head-text {
  text-align: center;
  margin: 40px 0 30px;
}

#head-text h1 {
  font-size: 2.4rem;
  font-weight: 700;
  color: #003366;
  letter-spacing: 2px;
}

/* ================= セクション ================= */

.paper-section {
  margin-bottom: 60px;
}

.paper-section h2 {
  font-size: 1.8rem;
  font-weight: 700;
  color: #003366;
  padding-bottom: 12px;
  margin-bottom: 30px;
  border-bottom: 2px solid #e5ecf3;
  letter-spacing: 1px;
}

/* ================= 教員リンク ================= */

.paper-links {
  list-style: none;
  padding: 0;
}

.paper-links li {
  margin-bottom: 14px;
}

.paper-links a {
  color: #0055a0;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s ease;
}

.paper-links a:hover {
  color: #003366;
  text-decoration: underline;
}

/* ================= 年度ブロック ================= */

.paper-year {
  background: #ffffff;
  border-radius: 14px;
  padding: 28px;
  margin-bottom: 30px;

  border: 1px solid #e9eef4;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.05);
}

.paper-year h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: #003366;
  margin-bottom: 16px;
  letter-spacing: 1px;
}

/* ================= 論文リスト ================= */

.paper-year ul {
  padding-left: 20px;
}

.paper-year li {
  margin-bottom: 10px;
  font-size: 0.95rem;
  color: #444;
  line-height: 1.7;
}

/* ================= 戻るボタン ================= */

.back-link {
  text-align: center;
  margin: 120px 0 80px;
}

.back-link a {
  display: inline-block;
  padding: 14px 34px;
  background: #003366;
  color: #fff;
  border-radius: 28px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
}

.back-link a:hover {
  background: #0055a0;
  transform: translateY(-2px);
}

/* ================= レスポンシブ ================= */

@media (max-width: 768px) {

  #paper-container {
    margin: 100px auto 80px;
  }

  #head-text h1 {
    font-size: 2rem;
  }

  .paper-section h2 {
    font-size: 1.5rem;
  }

  .paper-year {
    padding: 22px;
  }

  .paper-year h3 {
    font-size: 1.1rem;
  }
}