@charset "UTF-8";
@import url("https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&family=Space+Mono:wght@400;700&family=Exo+2:wght@100;200;300;400;500;600;700;800;900&family=Audiowide&family=Aldrich&family=Black+Ops+One&display=swap");
/*－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－

全ページ共通

－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－*/
html {
  font-size: 62.5%;
  scroll-behavior: smooth;
}

body {
  font-family: 'Orbitron', 'SF Mono', monospace;
  font-size: 1.6rem;
  color: #E8F4FD;
  letter-spacing: 1px;
  line-height: 1.6;
  background: linear-gradient(180deg, #0B0B1A 0%, #1A0B1A 100%);
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
}
@media screen and (max-width: 520px) {
  body {
    font-size: 1.4rem;
  }
}

*:hover,
*::before,
*::after {
  transition: 0.2s;
}

/*－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－

文字

－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－*/
p {
  margin: 20px 0;
  letter-spacing: 1px;
  text-align: justify;
}

a {
  color: inherit;
  -webkit-text-decoration: underline 1px #01577D;
          text-decoration: underline 1px #01577D;
  transition: 0.2s;
  -webkit-transition: 0.2s;
  -moz-transition: 0.2s;
  -ms-transition: 0.2s;
}

/*－－－－－－－－－－ リンクホバー時の設定 －－－－－－－－－－*/
@media (hover: hover) {
  a:not([class]):hover {
    background-color: #EDC339;
  }
}

/*fuwaimgでの無効化 */
#fuwaimg_prev:hover,
#fuwaimg_next:hover {
  background: none;
}

/*－－－－－－－－－－ 見出し －－－－－－－－－－*/
h1,
h2,
h3,
h4,
h5 {
  font-family: "Limelight", "BIZ UDPGothic", YuGothic, "Yu Gothic medium", "Hiragino Sans", Meiryo, "sans-serif";
  font-weight: lighter;
  letter-spacing: 4px;
  line-height: 1;
  text-transform: uppercase;
  overflow-wrap: break-word;
}
h1 .ja,
h2 .ja,
h3 .ja,
h4 .ja,
h5 .ja {
  font-size: 0.9em;
}

/*－－－－－－－－－－ 大見出し －－－－－－－－－－*/
.headingL {
  font-family: 'Orbitron', monospace;
  font-size: clamp(3rem, 2rem + 5vw, 8rem);
  margin: clamp(3rem, 2.8rem + 1vw, 4rem) 0;
  padding: 25px 50px;
  color: #fff;
  line-height: 1.2;
  background: linear-gradient(135deg,
    rgba(69, 39, 160, 0.3),
    rgba(160, 39, 89, 0.2),
    rgba(39, 160, 160, 0.3)
  );
  backdrop-filter: blur(25px);
  border: 2px solid;
  border-image: linear-gradient(45deg,
    rgba(255, 215, 0, 0.8),
    rgba(69, 39, 160, 0.8),
    rgba(160, 39, 89, 0.8)
  ) 1;
  width: fit-content;
  font-weight: 700;
  text-shadow:
    0 0 20px rgba(255, 215, 0, 0.8),
    0 0 40px rgba(69, 39, 160, 0.6),
    0 0 60px rgba(160, 39, 89, 0.4);
  box-shadow:
    0 0 50px rgba(69, 39, 160, 0.4),
    inset 0 2px 0 rgba(255, 255, 255, 0.2),
    0 0 100px rgba(255, 215, 0, 0.3);
  clip-path: polygon(15px 0%, 100% 0%, 100% calc(100% - 15px), calc(100% - 15px) 100%, 0% 100%, 0% 15px);
  letter-spacing: 3px;
  text-transform: uppercase;
}

/*－－－－－－－－－－ 中見出し －－－－－－－－－－*/
.headingM {
  font-size: clamp(2.4rem, 2.28rem + 0.6vw, 3rem);
  margin: clamp(2rem, 1.8rem + 1vw, 3rem) 0;
  color: #01577D;
  border-bottom: 1px solid #01577D;
}

/*－－－－－－－－－－ 小見出し －－－－－－－－－－*/
.headingS {
  position: relative;
  font-size: clamp(2rem, 1.96rem + 0.2vw, 2.2rem);
  color: #01577D;
  margin: 20px 0;
  padding-left: 18px;
}
.headingS::before {
  position: absolute;
  top: 0.3em;
  left: 0;
  content: "";
  display: block;
  width: 8px;
  height: 8px;
  background-color: #EDC339;
}

/*－－－－－－－－－－ 最小見出し －－－－－－－－－－*/
.headingSS {
  position: relative;
  font-size: clamp(1.8rem, 1.76rem + 0.2vw, 2rem);
  color: #01577D;
  margin: 20px 0;
  padding-left: 18px;
}
.headingSS::before {
  position: absolute;
  top: 0.4em;
  left: 0;
  content: "";
  display: block;
  width: 10px;
  height: 2px;
  background-color: #EDC339;
}

/*－－－－－－－－－－ 文字装飾 －－－－－－－－－－*/
.right {
  text-align: right;
}

.center {
  text-align: center;
}

.marker {
  background: linear-gradient(transparent 40%, rgba(237, 195, 57, 0.4) 40%);
}

.label {
  display: block;
  margin: 20px 0;
  padding: 2px 10px;
  background-color: #01577D;
  color: #fff;
  width: -moz-fit-content;
  width: fit-content;
}

/*－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－

アイコン等

－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－*/
.la,
.las {
  font-size: 1.2em;
  color: #01577D;
  position: relative;
  top: 2px;
}

/* 矢印 */
.arrow {
  width: 20px;
  height: 20px;
  border: 2px solid #01577D;
  border-bottom: 0;
  border-left: 0;
  transform: rotate(45deg);
  -webkit-transform: rotate(45deg);
  -moz-transform: rotate(45deg);
  -ms-transform: rotate(45deg);
  -o-transform: rotate(45deg);
}

/*－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－

入力フォーム、ボタン

－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－*/
/* 入力フォーム */
input,
textarea {
  -webkit-appearance: none;
     -moz-appearance: none;
          appearance: none;
  padding: 10px 20px 8px 20px;
  border: 0;
  border-bottom: 1px solid #01577D;
  margin: 10px 0;
}

textarea {
  border: 1px solid #01577D;
}

/* ボタン */
.btn {
  display: block;
  -webkit-appearance: none;
     -moz-appearance: none;
          appearance: none;
  background-color: #01577D;
  color: #fff;
  text-align: center;
  text-decoration: none;
  padding: 3px 10px;
  border: 1px solid #01577D;
  transition: 0.2s;
  -webkit-transition: 0.2s;
  -moz-transition: 0.2s;
  -ms-transition: 0.2s;
  -moz-transition: 0.2s;
}
.btn:hover {
  cursor: pointer;
  background-color: #EDC339;
}

/*－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－

リスト

－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－*/
.list,
.list-number {
  margin: 20px 0;
}

.list li {
  position: relative;
  margin-left: 16px;
}
.list li::before {
  position: absolute;
  top: calc(50% - 4px);
  left: -16px;
  content: "";
  display: block;
  width: 8px;
  height: 8px;
  background-color: #EDC339;
  border-radius: 50%;
  -webkit-border-radius: 50%;
  -moz-border-radius: 50%;
  -ms-border-radius: 50%;
  -o-border-radius: 50%;
}

/*－－－－－－－－－－ 数字付きリスト －－－－－－－－－－*/
.list-number {
  list-style-type: decimal-leading-zero;
  list-style-position: inside;
}
.list-number li {
  text-indent: -3.4rem;
  padding-left: 3.6rem;
}
.list-number li > :not(:first-child) {
  text-indent: 0;
}

/*－－－－－－－－－－ 表リスト －－－－－－－－－－*/
.gridlist {
  display: grid;
  grid-template-columns: auto 1fr;
  width: -moz-fit-content;
  width: fit-content;
}
.gridlist .gridlist__label,
.gridlist .gridlist__text {
  padding: 8px 20px;
  border-bottom: 1px solid #01577D;
}
.gridlist .gridlist__label {
  display: flex;
  align-items: center;
  color: #01577D;
}

/* スマホ */
@media screen and (max-width: 520px) {
  .gridlist {
    grid-template-columns: 1fr;
  }
}
/*－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－

枠組み

－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－*/
.box {
  padding: 40px;
  background-color: rgba(237, 195, 57, 0.4);
}
.box > :first-child {
  margin-top: 0;
}
.box > :last-child {
  margin-bottom: 0;
}

.box__title {
  border-bottom: 1px solid #fff;
  padding-left: 0;
}
.box__title::before {
  display: none;
}

/* スマホ */
@media screen and (max-width: 520px) {
  .box {
    padding: 30px;
  }
}
/*－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－

SNSアイコンリスト

－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－*/
.snslist .snslist__item a {
  width: 36px;
  height: 36px;
  display: flex;
  justify-content: center;
  align-items: center;
  text-decoration: none;
  background-color: #EDC339;
  border-radius: 50%;
  transition: 0.2s;
  -webkit-transition: 0.2s;
  -moz-transition: 0.2s;
  -ms-transition: 0.2s;
  -moz-transition: 0.2s;
}
.snslist .snslist__item a:hover {
  color: #fff;
  transition: none;
  -webkit-transition: none;
  -moz-transition: none;
  -ms-transition: none;
  -o-transition: none;
}
.snslist .snslist__item.twitter:hover a {
  background-color: #1DA1F2;
}
.snslist .snslist__item.instagram:hover a {
  background-color: #CF2E92;
}
.snslist .snslist__item.facebook:hover a {
  background-color: #4267b2;
}
.snslist .snslist__item.youtube:hover a {
  background-color: #DA1725;
}
.snslist .snslist__item .lab {
  margin: 6px 1px 3px 3px;
  font-size: 2rem;
}
@media screen and (max-width: 520px) {
  .snslist {
    justify-content: center;
  }
}

/*－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－

レイアウト

－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－*/
/*－－－－－－－－－－ 横並び －－－－－－－－－－*/
.flex {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  align-items: center;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  /* 表示サイズを変えたい場合は200pxの部分を変更 */
  gap: 20px;
  justify-content: center;
  align-items: center;
}

/*－－－－－－－－－－ 2カラム表示 －－－－－－－－－－*/
.--2column {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 60px;
  align-items: flex-start;
}

/* タブレット、スマホでは１カラム */
@media screen and (max-width: 1181px) {
  .--2column {
    grid-template-columns: 1fr;
  }
}
/*－－－－－－－－－－ 左右反対 －－－－－－－－－－*/
.reverse {
  flex-direction: row-reverse;
}

/*－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－

全体のレイアウト

－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－*/
/*－－－－－－－－－－ ヘッダー －－－－－－－－－－*/
/*－－－－－－－－－－ コンテンツ全体の横幅、余白 －－－－－－－－－－*/
.mainwrapper {
  padding: 0 10px;
}
.mainwrapper > :first-child {
  margin-top: 0;
}

/* PC */
@media screen and (min-width: 1181px), print {
  .mainwrapper {
    width: 80%;
    max-width: 1160px;
    margin: 0 auto;
    padding: 0;
  }
}
/*－－－－－－－－－－ セクション －－－－－－－－－－*/
section:first-child {
  padding-top: 60px;
}

section {
  padding: 40px;
  background: rgba(11, 11, 26, 0.8);
  border: 1px solid rgba(69, 39, 160, 0.3);
  margin-bottom: 60px;
  overflow: hidden;
}
section > :first-child {
  margin-top: 0;
}
section > :last-child {
  margin-bottom: 0;
}
section section {
  background: none;
  padding-left: 0;
  padding-right: 0;
  margin: 0;
}
section section:first-of-type {
  padding-top: 0;
}
section section:last-of-type {
  padding-bottom: 0;
}

/* PC */
@media screen and (min-width: 1181px), print {
  section {
    padding: 60px;
  }
  section > :nth-child(2) {
    margin-top: 0;
  }
  section section:nth-of-type(2) {
    padding-top: 0;
  }
}
/*－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－

モーフィングナビゲーション

－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－*/

.morphing-nav {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  width: auto;
}

.nav-container {
  display: flex;
  align-items: center;
  padding: 15px 30px;
  background: linear-gradient(135deg,
    rgba(11, 11, 26, 0.9) 0%,
    rgba(69, 39, 160, 0.2) 50%,
    rgba(11, 11, 26, 0.9) 100%
  );
  backdrop-filter: blur(25px);
  border: 2px solid;
  border-image: linear-gradient(45deg,
    rgba(255, 215, 0, 0.6),
    rgba(69, 39, 160, 0.8),
    rgba(160, 39, 89, 0.6),
    rgba(39, 160, 160, 0.8)
  ) 1;
  box-shadow:
    0 0 50px rgba(69, 39, 160, 0.4),
    inset 0 2px 0 rgba(255, 255, 255, 0.1),
    0 0 100px rgba(255, 215, 0, 0.2);
  position: relative;
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  clip-path: polygon(20px 0%, 100% 0%, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0% 100%, 0% 20px);
}

.nav-brand {
  font-family: 'Orbitron', monospace;
  font-size: 1.8rem;
  font-weight: 900;
  color: #fff;
  margin-right: 30px;
  background: linear-gradient(45deg, #FFD700, #4527A0, #A0274D, #27A0A0);
  background-size: 300% 300%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: cosmicShift 4s ease-in-out infinite;
  text-shadow: 0 0 20px rgba(255, 215, 0, 0.8);
  letter-spacing: 2px;
}

.nav-menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 8px;
}

.nav-link {
  display: block;
  padding: 12px 24px;
  color: rgba(232, 244, 253, 0.9);
  text-decoration: none;
  font-family: 'Orbitron', monospace;
  font-weight: 600;
  font-size: 1.3rem;
  transition: all 0.3s ease;
  position: relative;
  z-index: 2;
  letter-spacing: 1px;
  text-transform: uppercase;
  clip-path: polygon(8px 0%, 100% 0%, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0% 100%, 0% 8px);
}

.nav-link:hover, .nav-link.active {
  color: #fff;
  text-shadow: 0 0 10px rgba(120, 219, 255, 0.8);
}

.nav-indicator {
  position: absolute;
  height: 40px;
  background: linear-gradient(135deg, rgba(120, 119, 198, 0.3), rgba(255, 119, 198, 0.3));
  border-radius: 25px;
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  opacity: 0;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.nav-container:hover .nav-indicator {
  opacity: 1;
}

@media screen and (max-width: 768px) {
  .morphing-nav {
    top: 10px;
    width: calc(100% - 40px);
    left: 20px;
    transform: none;
  }

  .nav-container {
    justify-content: space-between;
    padding: 10px 20px;
  }

  .nav-brand {
    margin-right: 0;
  }

  .nav-menu {
    gap: 4px;
  }

  .nav-link {
    padding: 8px 12px;
    font-size: 1.2rem;
  }
}

/*－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－

旧メニュー

－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－*/
.globalnav {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 998;
  background-color: rgba(237, 195, 57, 0.6);
  -webkit-backdrop-filter: blur(2px);
          backdrop-filter: blur(2px);
}

.globalnav._fix {
  position: fixed;
  top: 0;
  right: 0;
}

.globalnav__main {
  align-items: flex-start;
  gap: 0;
}
.globalnav__main .globalnav__item {
  position: relative;
  font-weight: bold;
}
.globalnav__main .globalnav__item a {
  display: block;
  color: #fff;
  text-decoration: none;
  padding: 8px 10px 2px;
  overflow-wrap: break-word;
  transition: 0.2s;
  -webkit-transition: 0.2s;
  -moz-transition: 0.2s;
  -ms-transition: 0.2s;
  -moz-transition: 0.2s;
}
.globalnav__main .globalnav__item a:hover, .globalnav__main .globalnav__item a:has(+ .globalnav__child:hover) {
  background-color: #EDC339;
}
.globalnav__main .globalnav__item._has-child:hover .globalnav__child {
  visibility: visible;
  opacity: 1;
  transition: 0.4s;
  -webkit-transition: 0.4s;
  -moz-transition: 0.4s;
  -ms-transition: 0.4s;
  -moz-transition: 0.2s;
  -o-transition: 0.4s;
}
.globalnav__main .globalnav__child {
  position: absolute;
  right: 0;
  background-color: rgba(237, 195, 57, 0.4);
  -webkit-backdrop-filter: blur(2px);
          backdrop-filter: blur(2px);
  visibility: hidden;
  opacity: 0;
  transition: 0.2s;
  -webkit-transition: 0.2s;
  -moz-transition: 0.2s;
  -ms-transition: 0.2s;
  -moz-transition: 0.2s;
}

/*  タブレット、スマホでの表示 */
@media screen and (max-width: 1180px) {
  .globalnav__main .globalnav__item .globalnav__child {
    top: 100%;
    left: 0%;
    right: auto;
    max-width: calc(100vw - 40px);
    z-index: 1;
    visibility: visible;
    /*JSで制御するため一旦表示*/
    opacity: 1;
    /*JSで制御するため一旦表示*/
    display: none;
    /*JSのtoggleで表示させるため非表示に*/
  }
  .globalnav__main .globalnav__item .globalnav__child.active {
    display: block;
  }
}
/*－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－

サブメニュー

－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－*/
.submenu {
  margin-bottom: 40px;
}

.submenu__main {
  align-items: start;
}

.submenu__item {
  position: relative;
}
.submenu__item a {
  display: inline-block;
  padding: 8px 10px 8px;
  text-decoration: none;
  transition: 0.2s;
  -webkit-transition: 0.2s;
  -moz-transition: 0.2s;
  -ms-transition: 0.2s;
  -moz-transition: 0.2s;
}
/* 子、孫メニューの左に余白 */
.submenu__main ._has-child ul {
  margin-left: 20px;
}

/*－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－

ページUP

－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－*/
.pageup {
  position: fixed;
  right: 2vw;
  bottom: 2vw;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, rgba(120, 119, 198, 0.8), rgba(255, 119, 198, 0.8));
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  transition: all 0.3s ease;
  opacity: 0;
  visibility: hidden;
  box-shadow:
    0 8px 32px rgba(120, 119, 198, 0.4),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
}
.pageup .arrow {
  border-color: #fff;
  margin-top: 10px;
  transform: rotate(-45deg);
  -webkit-transform: rotate(-45deg);
  -moz-transform: rotate(-45deg);
  -ms-transform: rotate(-45deg);
  -o-transform: rotate(-45deg);
}
.pageup._active {
  opacity: 1;
  visibility: visible;
}

@media (hover: hover) {
  .pageup:hover {
    background-color: #EDC339;
  }
}
/*－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－

フッター

－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－*/
footer {
  color: #fff;
  font-size: 1.2rem;
  padding: 10px;
  text-align: center;
}

/*－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－

アニメーション

－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－*/

/* スクロールアニメーション */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes pulse {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
  100% {
    transform: scale(1);
  }
}

@keyframes slideInScale {
  0% {
    opacity: 0;
    transform: scale(0.8) translateY(20px);
  }
  100% {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

/* アニメーション適用クラス */
.fade-in-up {
  animation: fadeInUp 0.8s ease-out forwards;
}

.fade-in-left {
  animation: fadeInLeft 0.8s ease-out forwards;
}

.fade-in-right {
  animation: fadeInRight 0.8s ease-out forwards;
}

.slide-in-scale {
  animation: slideInScale 0.6s ease-out forwards;
}

/* 初期状態（アニメーション前） */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease-out;
}

.animate-on-scroll.animated {
  opacity: 1;
  transform: translateY(0);
}

@keyframes cosmicShift {
  0%, 100% {
    background-position: 0% 50%;
    filter: hue-rotate(0deg);
  }
  25% {
    background-position: 25% 75%;
    filter: hue-rotate(90deg);
  }
  50% {
    background-position: 100% 50%;
    filter: hue-rotate(180deg);
  }
  75% {
    background-position: 75% 25%;
    filter: hue-rotate(270deg);
  }
}

@keyframes textGlow {
  0% {
    filter: drop-shadow(0 0 20px rgba(255, 0, 128, 0.5));
  }
  100% {
    filter: drop-shadow(0 0 40px rgba(120, 219, 255, 0.8));
  }
}

/* 削除 */

/* 削除 */

/* 削除 */

/* 削除 */

/* 削除 */

/* 削除 */

/* 削除 */

/* 削除 */

/* 削除 */

/* 削除 */

/* 削除 */

/* 削除 */

@keyframes planetOrbit {
  0% {
    transform: rotate(0deg) translateX(150px) rotate(0deg) scale(1);
    opacity: 0.8;
  }
  25% {
    transform: rotate(90deg) translateX(160px) rotate(-90deg) scale(1.1);
    opacity: 0.9;
  }
  50% {
    transform: rotate(180deg) translateX(150px) rotate(-180deg) scale(1);
    opacity: 1;
  }
  75% {
    transform: rotate(270deg) translateX(140px) rotate(-270deg) scale(0.9);
    opacity: 0.9;
  }
  100% {
    transform: rotate(360deg) translateX(150px) rotate(-360deg) scale(1);
    opacity: 0.8;
  }
}

/* 削除 */

/* ページUPボタンのフロートアニメーション */
.pageup {
  animation: float 3s ease-in-out infinite;
}

/* 削除 */

/* 軽量星空背景 */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(1px 1px at 50px 50px, white, transparent),
    radial-gradient(1px 1px at 150px 100px, #FFD700, transparent),
    radial-gradient(1px 1px at 250px 150px, white, transparent),
    radial-gradient(1px 1px at 350px 200px, #4527A0, transparent);
  background-size: 400px 300px;
  opacity: 0.6;
  z-index: -1;
}

/* 削除 */

/* 宇宙の波動層 */
body {
  position: relative;
}

body:before {
  background-size: 400px 200px;
  animation: starfieldMove 200s linear infinite, starfieldTwinkle 4s ease-in-out infinite alternate;
}

/* 削除 */

/* 削除 */

/* 削除 */