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

body {
  font-family:
    "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans",
    "Noto Sans JP", Meiryo, sans-serif;
}

header {
  background-color: #ffffff;
  color: #0a2f50;
  font-size: 1rem;
  font-weight: normal;
  padding: 16px;
}

h1 {
  background-color: #0a2f50;
  color: #ffffff;
  font-size: 1.125rem;
  font-weight: normal;
  margin: 0;
  padding: 12px 16px;
}

.articles {
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding: 16px;
}

article h2 {
  background-color: #f7f7f7;
  font-size: 1rem;
  font-weight: bold;
  padding: 16px;
  margin-bottom: 16px;
}

p {
  font-size: 98%;
}