@charset "UTF-8";

/* 初期設定 */

html, body, div, span, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
abbr, address, cite, code,
del, dfn, em, img, ins, kbd, q, samp,
small, strong, sub, sup, var,
b, i,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, figcaption, figure,
footer, header, hgroup, menu, nav, section, summary,
time, mark, audio, video {
  margin: 0;
  padding: 0;
  border: 0;
  outline: 0;
  font-size: 100%;
  font-weight: normal;
  vertical-align: baseline;
  background: transparent;
}

html {
  font-size: 62.5%;
}

body {
  font-size: 16px;
  font-size: 1.6rem;
  color: #333;
  font-family: 'Noto Sans JP', "ヒラギノ角ゴ ProN W3" , "Hiragino Kaku Gothic ProN," , "ヒラギノ角ゴシック Pro", "Hiragino Kaku Gothic Pro", 'メイリオ' , Meiryo , Osaka, "ＭＳ Ｐゴシック", "MS PGothic", sans-serif;
  letter-spacing: 0.05em;
  line-height: 1.8;
  overflow-y: scroll;
}

article, aside, details, figcaption, figure,
footer, header, hgroup, menu, nav, section {
  display: block;
}

nav ul, li {
  list-style: none;
}

blockquote, q {
  quotes: none;
}

blockquote:before, blockquote:after,
q:before, q:after {
  content: "";
  content: none;
}

a {
  margin: 0;
  padding: 0;
  font-size: 100%;
  vertical-align: baseline;
  background: transparent;
  text-decoration: none;
  transition: all .3s;
}

*,
*::before,
*::after {
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
}

ul {
  list-style: none;
}

img {
  display: block;
  width: 100%;
  height: auto;
}

/* 初期設定ここまで */

.content_area {
  width: 100%;
  height: 100svh;
  background: #000;
}

.bg {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 0;
  padding: 14% 20px;
}

.bg_img {
  max-width: 880px;
  width: 100%;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(0);
  z-index: -1;
  animation: go_around 100s linear infinite;
}

.bg_img::after {
  content: '';
  width: 100%;
  height: 100%;
  background-color: #000;
  position: absolute;
  top: 0;
  left: 0;
  transition: opacity 1s;
}

.bg_img.open::after {
  opacity: 0;
}

@media screen and (max-width: 767px) {

  .bg_img::after {
    opacity: 0;
  }
}

@keyframes go_around {
  0% {
    transform: translate(-50%, -50%) rotate(0);
  }
  100% {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}

.bg_img_flower_top {
  display: block;
  max-width: 260px;
  width: 40%;
  aspect-ratio: 300 / 240;
  position: fixed;
  top: 10px;
  left: 20px;
  z-index: -1;
}

.bg_img_flower_top::before {
  content: '';
  max-width: 135px;
  width: 50%;
  aspect-ratio: 165/155;
  background: url(flower.webp) no-repeat 0 0 /cover;
  position: absolute;
  top: 0;
  right: 0;
  opacity: 0;
  animation: disappear 3s linear infinite alternate;
}

.bg_img_flower_top::after {
  content: '';
  max-width: 135px;
  width: 50%;
  aspect-ratio: 165/155;
  background: url(flower.webp) no-repeat 0 0 /cover;
  position: absolute;
  bottom: 0;
  left: 0;
  transform: rotate(45deg);
  opacity: 0;
  animation: disappear 3s 1s linear infinite alternate;
}

.bg_img_flower_bottom {
  display: block;
  max-width: 260px;
  width: 40%;
  aspect-ratio: 300 / 240;
  position: fixed;
  bottom: 10px;
  right: 20px;
  z-index: -1;
}

.bg_img_flower_bottom::before {
  content: '';
  max-width: 135px;
  width: 50%;
  aspect-ratio: 165/155;
  background: url(flower.webp) no-repeat 0 0 /cover;
  position: absolute;
  top: 0;
  right: 0;
  transform: rotate(45deg);
  opacity: 0;
  animation: disappear 3s 1s linear infinite alternate;
}

.bg_img_flower_bottom::after {
  content: '';
  max-width: 135px;
  width: 50%;
  aspect-ratio: 165/155;
  background: url(flower.webp) no-repeat 0 0 /cover;
  position: absolute;
  bottom: 0;
  left: 0;
  opacity: 0;
  animation: disappear 3s 2.4s linear infinite alternate;
}

@keyframes disappear {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}

.content_list {
  max-width: 1000px;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 40px;
}

.content_item {
  width: 100%;
}

.content_item a {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 80px;
  font-size: clamp(1.6rem, 4vw, 2rem);
  color: #fff;
  text-decoration: none;
  background-color: #000;
  border-radius: 10px;
  border: 2px solid #824af8;
  padding: 10px 20px;
  position: relative;
  transition: all .3s;
}

.content_item a::after {
  content: '';
  width: 8px;
  height: 8px;
  border-style: solid;
  border-color: #fff;
  border-width: 0 1px 1px 0;
  position: absolute;
  top: 50%;
  right: 14px;
  transform: translateY(-50%) rotate(-45deg);
}

.content_item a:hover {
  background: rgba(0, 0, 0, 0.7);
}

@media screen and (max-width: 767px) {

  .content_list {
    gap: 20px;
  }

  .content_item a {
    min-height: 60px;
  }
}