@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;700&display=swap");

/* --- 講座テキスト専用スタイル --- */
.lesson-content {
  font-family: "Noto Sans JP", sans-serif;
  line-height: 1.8;
  color: #333;
  background-color: #fff;
  padding: 30px 40px;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  margin: 40px 0;
}
.lesson-content h1,
.lesson-content h2,
.lesson-content h3 {
  font-weight: 700;
  color: #1a237e;
  border-bottom: 2px solid #c5cae9;
  padding-bottom: 10px;
  margin-top: 40px;
  margin-bottom: 20px;
}
.lesson-content h1 {
  font-size: 2em;
  text-align: center;
  border-bottom-width: 3px;
  border-color: #3f51b5;
}
.lesson-content h2 {
  font-size: 1.8em;
  margin-top: 60px;
}
.lesson-content h3 {
  font-size: 1.5em;
  border-bottom-style: dotted;
  margin-top: 20px;
}
.lesson-content blockquote h4 {
  font-size: 1.1em;
  color: #303f9f;
  border-bottom: 1px dotted #7986cb;
  padding-bottom: 5px;
  margin-top: 1.5em;
}
.lesson-content p {
  margin-bottom: 1.2em;
}
.lesson-content ol,
.lesson-content ul {
  padding-left: 20px;
  margin: 1.5em 0;
}
.lesson-content ol {
  list-style-type: decimal;
}
.lesson-content li {
  margin-bottom: 0.8em;
}
.lesson-content strong,
.lesson-content b {
  color: #d81b60;
}
.lesson-content blockquote {
  background-color: #f5f5f5;
  border-left: 5px solid #ccc;
  padding: 15px;
  margin: 20px 0;
  border-radius: 5px;
}
.lesson-content .point-解説 {
  background: #e3f2fd;
  border: 1px solid #90caf9;
  padding: 15px;
  margin: 20px 0;
  border-radius: 5px;
}
.lesson-content .point-解説::before {
  content: "【ポイント解説】";
  font-weight: bold;
  display: block;
  margin-bottom: 10px;
  color: #1565c0;
}
.lesson-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 25px 0;
  font-size: 0.9em;
}
.lesson-content th,
.lesson-content td {
  border: 1px solid #ddd;
  padding: 12px;
  text-align: left;
}
.lesson-content th {
  background-color: #3f51b5;
  color: white;
  font-weight: bold;
}
.lesson-content tbody tr:nth-child(even) {
  background-color: #f2f2f2;
}
.lesson-content .prompt-block {
  position: relative;
  background-color: #263238;
  color: #eceff1;
  border-radius: 8px;
  font-family: "Courier New", Courier, monospace;
  padding: 50px 20px 20px 20px;
}
.lesson-content .prompt-block pre {
  margin: 0;
  padding: 0;
  white-space: pre-wrap;
  word-wrap: break-word;
}
.lesson-content .copy-button {
  position: absolute;
  top: 15px;
  right: 15px;
  background-color: #455a64;
  color: white;
  border: none;
  padding: 4px 8px;
  border-radius: 5px;
  cursor: pointer;
  font-size: 14px;
  transition: background-color 0.2s;
}
.lesson-content .copy-button:hover {
  background-color: #607d8b;
}
.lesson-content .section-divider {
  border: 0;
  height: 1px;
  background: #ddd;
  margin: 60px auto;
}
.feedback-section h3 {
  border-bottom-color: #e0e0e0;
}
.next-lesson-section {
  text-align: center;
  padding: 40px 20px;
  background-color: #f5f7fa;
  margin: 60px -40px -30px -40px; /* lesson-contentのpaddingを相殺 */
  border-bottom-left-radius: 8px;
  border-bottom-right-radius: 8px;
}
.next-lesson-section h2 {
  color: #3f51b5;
  border-color: #7986cb;
}
.nav-button-next {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 15px 40px;
  background-color: #3f51b5;
  color: white;
  text-decoration: none;
  font-weight: bold;
  font-size: 1.1em;
  border-radius: 50px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
  margin-top: 20px;
}
.nav-button-next:hover {
  background-color: #303f9f;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
  transform: translateY(-3px);
}
.nav-button-next i {
  margin-left: 10px;
  transition: transform 0.3s ease;
}
.nav-button-next:hover i {
  transform: translateX(5px);
}
.lesson-content .prompt-list {
  margin-bottom: 25px;
}
/* Stable Diffusionの例で最後のプロンプトの余白を調整 */
.lesson-content .prompt-list:last-of-type {
  margin-bottom: 0;
}
@media screen and (max-width: 768px) {
  .lesson-content {
    padding: 20px 15px;
    margin: 20px 0;
  }
  .lesson-content h1 {
    font-size: 1.8em;
  }
  .lesson-content h2 {
    font-size: 1.5em;
    margin-top: 50px;
  }
  .lesson-content h3 {
    font-size: 1.3em;
  }
  .lesson-content table,
  .lesson-content .prompt-block {
    font-size: 0.8em;
  }
  .next-lesson-section {
    margin: 40px -15px -20px -15px;
    padding: 30px 15px;
  }
}
/* ===== ▼▼▼ 画像のはみ出し防止と装飾のためのスタイル ▼▼▼ ===== */
.lesson-content img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 35px auto;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}
/* ===== ▼▼▼ AI博士 相談セクションのスタイル ▼▼▼ ===== */
.ai-hakase-cta {
  display: flex;
  align-items: center;
  background-color: #f5f7fa;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  padding: 25px 30px;
  margin-top: 60px;
  gap: 25px; /* アイコンとテキストの間隔 */
}
.ai-hakase-cta img {
  max-width: 100px;
  height: auto;
  display: block;
  margin: 35px auto;
  border-radius: 50%;
}
.ai-hakase-cta .cta-icon {
  font-size: 50px;
  color: #3f51b5;
  background-color: #fff;
  border-radius: 50%;
  width: 90px;
  height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0; /* コンテンツが縮んでもアイコンサイズを維持 */
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}
.ai-hakase-cta .cta-content h3 {
  margin-top: 0;
  margin-bottom: 8px;
  font-size: 1.3em;
  color: #1a237e;
  border: none; /* h3のデフォルト下線を解除 */
  padding-bottom: 0;
}
.ai-hakase-cta .cta-content p {
  margin-bottom: 15px;
  font-size: 0.95em;
  line-height: 1.7;
}
.ai-hakase-cta .category-btn {
  display: inline-block;
  padding: 10px 25px;
  border: 2px solid var(--primary-color-start);
  background: transparent;
  color: var(--primary-color-start);
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: 600;
}
.ai-hakase-cta .category-btn:hover {
  background: var(--primary-color-start);
  color: white;
  border-color: var(--primary-color-start);
}
.button-wrapper {
  text-align: center;
}

/* ===== ▼▼▼ コメントセクションのスタイル ▼▼▼ ===== */
.comment-section {
  max-width: 900px; /* .containerの最大幅に合わせる */
  margin: 40px auto; /* 上下の余白と中央配置 */
  padding: 30px 40px;
  background-color: #f5f7fa;
  border-radius: 8px;
}
.comment-section h2 {
  font-size: 1.8em;
  text-align: center;
  color: #3f51b5;
  border-bottom: 2px solid #c5cae9;
  padding-bottom: 15px;
  margin-bottom: 30px;
}
@media screen and (max-width: 768px) {
  .ai-hakase-cta {
    flex-direction: column; /* スマホでは縦並びに */
    text-align: center;
    padding: 20px;
    gap: 15px;
  }
  .comment-section {
    padding: 20px 15px;
  }
}
/* --- ① クエスト用ボックス (青ベース) --- */
.quest-box {
  background: #e3f2fd;
  border: 1px dashed #2196f3;
  border-left: 5px solid #2196f3;
  padding: 20px;
  margin: 25px 0;
  border-radius: 8px;
}
.quest-box h4 {
  color: #1565c0;
  font-size: 1.3em;
  margin-top: 0;
  margin-bottom: 15px;
  display: flex;
  align-items: center;
}
.quest-box h4 i {
  margin-right: 10px;
}

/* --- ② 裏ワザ＆失敗あるある用ボックス (グレーベース) --- */
.tips-box {
  background: #f5f5f5;
  border: 1px solid #e0e0e0;
  padding: 20px;
  margin: 25px 0;
  border-radius: 8px;
}
.tips-box h4 {
  color: #424242;
  font-size: 1.3em;
  margin-top: 0;
  margin-bottom: 15px;
}

/* --- ③ ミニ課題用ボックス (オレンジベース) --- */
.mini-assignment-box {
  background: #fff3e0;
  border-top: 3px solid #ff9800;
  border-bottom: 3px solid #ff9800;
  padding: 20px;
  margin: 25px 0;
}
.mini-assignment-box h4 {
  color: #e65100;
  font-size: 1.3em;
  margin-top: 0;
  margin-bottom: 15px;
  text-align: center;
}

/* --- ④ 用語カード用ボックス (緑ベース) --- */
.term-card-box {
  background: #e8f5e9;
  border: 1px solid #a5d6a7;
  padding: 20px;
  margin: 25px 0;
  border-radius: 8px;
}
.term-card-box h4 {
  color: #2e7d32;
  font-size: 1.3em;
  margin-top: 0;
  margin-bottom: 15px;
}
/* 用語カード内のテーブルスタイルを微調整 */
.term-card-box table {
  font-size: 1em;
}
.term-card-box th {
  background-color: #66bb6a;
}


/* --- ⑤ 章末ミニクイズ用ボックス (紫ベース) --- */
.quiz-box {
  background: #f3e5f5;
  border: 1px solid #ce93d8;
  padding: 20px;
  margin: 25px 0;
  border-radius: 8px;
}
.quiz-box h4 {
  color: #6a1b9a;
  font-size: 1.3em;
  margin-top: 0;
  margin-bottom: 15px;
}

/* --- ⑥ FAQコーナー用ボックス (イエローベース) --- */
.faq-box {
  background: #fffde7;
  border-left: 5px solid #fdd835;
  padding: 20px;
  margin: 25px 0;
  border-radius: 0 8px 8px 0;
}
.faq-box h4 {
  color: #f57f17;
  font-size: 1.3em;
  margin-top: 0;
  margin-bottom: 15px;
}