@charset "utf-8";

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

body {
  font-family: sans-serif;
  font-size: 16px;
  line-height: 1em;
  color: #000000;
  background-color: #ffffff;
}

img {
  max-width: 100%;
}

/*
  ヘッダ
*/
.header {
  font-family: "Science Gothic", sans-serif;
  font-optical-sizing: auto;
  font-weight: 400;
  font-style: normal;
  font-variation-settings:
    "slnt" 0,
    "wdth" 100,
    "CTRS" 0;
}

.header-inner {
  height: 110px;
  color: #fff;
  background-color: #333;
  display: flex;
  align-items: center;
}
.header .logo {
  height: 40px;
  margin: 0 30px 0 30px;
}
.header .header-message {
  width: 100%;
}

/*
  メインコンテンツ
*/
.main {
  min-height: calc(100vh - 110px - 65px);
  line-height: 1.8em;
}
/* タイトル */
.main .title {
  text-align: center;
}

/* コンテンツ */
.main .contents {
  display: flex;
  flex-direction: row-reverse;
  justify-content: flex-end;
  column-gap: 30px;

  width: 1080px;
  max-width: 90%;
  margin: 20px auto 0 auto;
}
.main .contents .item {
  flex-grow: 1;
}
.main .contents .item h2 {
  margin: 40px 0 15px 0;
  border-bottom: 1px solid #888;
  padding: 10px 0 10px 10px;
  font-size: 28px;
  background-color: #ddd;
}
.main .contents .item h2:first-child {
  margin-top: 0;
}
.main .contents .item h3 {
  margin: 20px 0 10px 0;
  border-bottom: 1px solid #888;
  font-size: 20px;
}
.main .contents .item ul {
  padding-left: 2em;
}


/* サイドメニュー */
.main .contents .menu {
  flex-shrink: 0;
  position: relative;
}
.main .contents .menu-inner {
  width: 250px;
  position: sticky;
  top: 30px;
  left: 0;
  right: 0;
  border: 1px solid #ddd;
  padding: 1px;
}
.main .contents .menu-inner h2 {
  padding: 15px 0 15px 10px;
  font-size: 15px;
  font-weight: bold;
  background-color: #ddd;
}
.main .contents .menu-inner h2::before {
  content: "■ ";
  color: #aaa;
}

.main .contents .menu-inner ul {
  list-style-type: none;
}
.main .contents .menu-inner li {
  display: flex;
  gap: 8px;
  border-bottom: 1px solid #ccc;
}
.main .contents .menu-inner li:last-child {
  border-bottom: none;
}
.main .contents .menu-inner li::before {
  content: "≫";
  display: inline-flex;
  padding-left: 10px;
  justify-content: center;
  align-items: center;
  font-size: 10px;
  font-weight: bold;
  flex-shrink: 0;
}
.main .contents .menu-inner a {
  display: inline-flex;
  width: 100%;
  padding: 15px 0 15px 0;
  color: inherit;
  text-decoration: none;
}
.main .contents .menu-inner a:hover {
  color: #555;
}


/*
  フッタ
*/
.footer {
  height: 50px;
  margin-top: 15px;
  padding-top: 15px;
  font-size: 12px;
  text-align: center;
  color: #fff;
  background-color: #333;

  font-family: "Science Gothic", sans-serif;
  font-optical-sizing: auto;
  font-weight: 400;
  font-style: normal;
  font-variation-settings:
    "slnt" 0,
    "wdth" 100,
    "CTRS" 0;
}

/*
  モバイルメディア用指定
*/
@media (max-width: 800px) {
  .header .logo {
    height: 20px;
    margin: 0 10px 0 10px;
  }

  .main .contents .menu {
    display: none;
  }
}