/* 全体のスタイル */
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Hiragino Sans", sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
  background-color: #fafafa;
}

h1 {
  font-size: 1.5em;
}

a {
  font-weight: bold;
  color: #000000;
}

.container {
  background-color: #fafafa;
  padding: 40px;
  border-radius: 10px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

h2 {
  margin-bottom: 20px;
  text-align: center;
  color: #000000;
  padding: 10px 0;
  padding-left: 15px;
}
h3 {
  color: #555555;
  margin-top: 25px;
  margin-bottom: 10px;
}
.toc {
  background: #f8f9fa;
  padding: 25px;
  border-radius: 8px;
  margin-bottom: 30px;
  border: 1px solid #e9ecef;
}
.toc h2 {
  margin-top: 0;
  background: none;
  border: none;
  padding: 0;
}
.toc ul {
  margin: 0;
  padding-left: 20px;
}
.toc li {
  margin: 8px 0;
}
.toc a {
  color: #3498db;
  text-decoration: none;
  font-weight: 500;
}
.toc a:hover {
  text-decoration: underline;
}
p {
  margin-bottom: 15px;
}
ul,
ol {
  margin-bottom: 15px;
  padding-left: 25px;
}
li {
  margin: 8px 0;
}
.highlight {
  background: #fff3cd;
  padding: 15px;
  border-left: 4px solid #ffc107;
  margin: 20px 0;
}
.contact-info {
  background: #e8f5e8;
  padding: 20px;
  border-radius: 8px;
  border: 1px solid #c3e6cb;
  margin: 20px 0;
}

.container h2 {
  border-left: 4px solid #3498db;
}

.update-date {
  text-align: right;
  color: #666;
  font-size: 14px;
  margin-bottom: 20px;
}
table {
  width: 100%;
  border-collapse: collapse;
  margin: 15px 0;
}
th,
td {
  border: 1px solid #ddd;
  padding: 12px;
  text-align: left;
}
th {
  background-color: #f8f9fa;
  font-weight: 600;
}

/* スクロールバーのカスタマイズ */
.scrollable::-webkit-scrollbar {
  width: 6px;
}

.scrollable::-webkit-scrollbar-thumb {
  background-color: #007bff;
  border-radius: 3px;
}

/* 横棒のスタイル */
#scroll-bar {
  position: fixed;
  top: 0;
  width: 100%;
  background-color: #333;
  color: white;
  text-align: center;
  padding: 10px;
  display: none; /* 初期は非表示 */
  z-index: 1000;
}

#scroll-bar a {
  color: white;
  margin: 0 15px;
  text-decoration: none;
}

#scroll-bar a:hover {
  text-decoration: underline;
}