header {
  background-color: rgb(15, 120, 200);
  width: 100vw;
  margin: 0;
  min-height: 90px;
}

body {
  margin: 0;
}
.project_name {
  color: white;
  font-size: 34px;
  margin: 0;
  padding-left: 12px;

  font-family: "Noto Sans JP", sans-serif;
  font-weight: 600;
}

.project_sub_name {
  color: white;
  font-size: 24px;
  margin: 0;
  padding-left: 12px;

  font-family: "Noto Sans JP", sans-serif;
  font-weight: 400;
}

.main_area {
  width: 95vw;
  padding-left: 20px;
}

.context_area {
  width: 100%;
}

.main_area h3 {
  font-size: 24px;
  font-family: "Noto Sans JP", sans-serif;
  font-weight: 500;
  margin-bottom: 4px;

  padding-left: 4px;
  padding-right: 4px;
}

.main_area p {
  font-size: 18px;
  font-family: "Noto Sans JP", sans-serif;
  font-weight: 400;
  margin-top: 0px;
  margin-bottom: 2px;
  margin-left: 10px;
}

.happy {
  max-width: 90vw;
}