@charset "UTF-8";
/* ===== 全体レイアウト ===== */
.main-content {
  margin-top: 80px;
  margin-left: auto;
  margin-right: auto;
  max-width: 900px;
  padding: 30px;
  background-color: #f8faff;
  border-radius: 12px;
  box-shadow: 0 0 12px rgba(0, 0, 0, 0.08);
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  color: #333;
  line-height: 1.8;
  font-size: 16px;
}

/* ===== タイトル ===== */
.main-content h1 {
  font-size: 26px;
  color: #2c3e50;
  margin-bottom: 20px;
  text-align: center;
  border-bottom: 2px solid #007bcd;
  padding-bottom: 5px;
}

/* ===== セクション見出し ===== */
.main-content h2 {
  font-size: 20px;
  color: #007bcd;
  margin-top: 40px;
  margin-bottom: 10px;
  border-left: 6px solid #007bcd;
  padding-left: 10px;
  background-color: #e6f3ff;
  padding-top: 4px;
  padding-bottom: 4px;
  border-radius: 4px;
}

/* ===== 段落 ===== */
.main-content p {
  margin-bottom: 15px;
  text-align: justify;
}

/* ===== リスト ===== */
.main-content ul {
  padding-left: 20px;
  margin-bottom: 20px;
}
.main-content ul li {
  margin-bottom: 8px;
}

/* ===== リンク ===== */
.main-content a {
  color: #007bcd;
  text-decoration: underline;
}
.main-content a:hover {
  text-decoration: none;
}

/* ===== 画像の調整 ===== */
.main-content img {
  max-width: 100%;
  height: auto;
  margin: 10px;
  border-radius: 6px;
  box-shadow: 0 0 4px rgba(0,0,0,0.1);
}

/* ===== table調整 ===== */
.main-content table {
  font-size: 14px;
  border-collapse: collapse;
  width: 100%;
  margin: 20px 0;
}
.main-content th, .main-content td {
  border: 1px solid #ccc;
  padding: 6px 10px;
  text-align: left;
}
.main-content th {
  background-color: #eef7ff;
}

/* ===== Tooltip ===== */
.tooltip {
  position: relative;
  cursor: help;
  color: #007bcd;
  font-weight: bold;
  border-bottom: 1px dotted #007bcd;
}

.tooltip::after {
  content: attr(title);
  position: absolute;
  bottom: 125%;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.85);
  color: #fff;
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 13px;
  white-space: nowrap;
  z-index: 999;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.tooltip:hover::after {
  opacity: 1;
}

/* ===== メディアクエリ（レスポンシブ） ===== */
@media screen and (max-width: 600px) {
  .main-content {
    padding: 20px;
    font-size: 15px;
  }
  .main-content h1 {
    font-size: 22px;
  }
  .main-content h2 {
    font-size: 18px;
  }
  .main-content table {
    font-size: 13px;
  }
  .tooltip::after {
    font-size: 12px;
  }
}