*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background-color: #ffffff;
  color: #333333;
  font-family: "游ゴシック", "Yu Gothic", sans-serif;
  line-height: 1.8;
  font-size: 16px;
}

.container {
  max-width: 680px;
  margin: 0 auto;
  padding: 60px 20px;
}

header {
  margin-bottom: 60px;
}

header h1 a {
  color: #333333;
  text-decoration: none;
  font-size: 24px;
  font-weight: 700;
}

header h1 a:hover {
  text-decoration: underline;
}

footer {
  margin-top: 80px;
  padding-top: 20px;
  border-top: 1px solid #e0e0e0;
  font-size: 14px;
  color: #999999;
}

a {
  color: #000000;
  text-decoration: underline;
}

.post-link {
  display: block;
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid #eeeeee;
}

.post-link h2 {
  font-size: 20px;
  margin-bottom: 4px;
}

.post-link h2 a {
  color: #333333;
  text-decoration: none;
}

.post-link h2 a:hover {
  text-decoration: underline;
}

.post-link .date {
  font-size: 14px;
  color: #999999;
}

article h1 {
  font-size: 28px;
  margin-bottom: 8px;
  line-height: 1.4;
}

article .date {
  font-size: 14px;
  color: #999999;
  margin-bottom: 40px;
}

article .content {
  font-size: 17px;
}

article .content p {
  margin-bottom: 24px;
}

article .content h2 {
  font-size: 22px;
  margin: 40px 0 16px;
}

article .content h3 {
  font-size: 18px;
  margin: 32px 0 12px;
}

article .content pre {
  background: #f5f5f5;
  padding: 16px;
  overflow-x: auto;
  font-size: 14px;
  line-height: 1.6;
  margin-bottom: 24px;
}

article .content code {
  font-size: 14px;
}

article .content ul,
article .content ol {
  margin-bottom: 24px;
  padding-left: 24px;
}

article .content li {
  margin-bottom: 8px;
}

article .content blockquote {
  border-left: 3px solid #e0e0e0;
  padding-left: 16px;
  color: #666666;
  margin-bottom: 24px;
}

article .content table {
  border-collapse: collapse;
  width: 100%;
  margin-bottom: 24px;
}

article .content th,
article .content td {
  border: 1px solid #e0e0e0;
  padding: 8px 12px;
  text-align: left;
}

article .content th {
  background: #f5f5f5;
}