body {
  margin: 0;
  padding: 0;
  max-width: 100%;
  overflow: hidden;
  font-family: Noto Sans JP;
}

a {
  text-decoration: none;
  color: inherit;
}

.header {
  box-sizing: border-box;
  width: 100%;
  background-color: #171717;
}

.header-inner {
  display: flex;
  align-items: center;
  max-width: 1024px;
  height: 60px;
  padding: 0 0.8em;
  margin: 0 auto;
  font-size: 1.2em;
}

.logo {
  width: 150px;
  content: url("image/koganpa.png");
}

.header-nav-list {
  display: inline-block;
}

.header-nav-item {
  float: left;
  padding: 12px;
  font-size: 14px;
  font-weight: bold;
  color: #FFFFFF;
  text-align: center;
  list-style: none;
}

.header-nav-item:hover {
  color: #444444;
}

.header-nav-item a {
  text-decoration: none;
}

.header-ham {
  display: none;
}

.menu2 {
  width: 20px;
  height: 3px;
  margin: 4px 0;
  margin-right: 0;
  background-color: #333;
}

.logo img {
  width: 70px;
}

@media screen and (max-width: 480px) {
  .header-nav-list {
    display: none;
  }

  .header-nav {
    margin: 0 0 0 auto;
  }

  .header-ham {
    display: block;
  }
}