@charset "utf-8";
/* CSS Document */
body{
  width: 100%;
  margin: 0;
  background-color: #bbb;
  color: #111;
  font-size: 16px;
  font-family: "yu-gothic-pr6n", sans-serif;
  font-weight: 400;
  font-style: normal;
}
/* COMMON CLASS -------------------------------- */
.container{
  width: 640px;
  margin: auto;
}

.hidden{
  display: none;
}
.center{
  text-align: center;
}

.highlighted{
  display: inline-block;
  padding: 0.25em 0.5em;
  background-color: #fff;
}

.mb16{
  margin-bottom: 1em;/*16px*/
}
.mb20{
  margin-bottom: 1.25em;/*20px*/
}
.mb24{
  margin-bottom: 1.5em;/*24px*/
}
.mb28{
  margin-bottom: 1.75em;/*28px*/
}
.mb40{
  margin-bottom: 2.5em;/*40px*/
}
.mb56{
  margin-bottom: 3.5em;/*56px*/
}
.font-small{
  font-size: 0.76em;
}
.fs22{
  font-size: 1.38em;
}
.fs18{
  font-size: 1.13em;
}
.font-bold{
  font-weight: bold;
}
.font-underline{
  text-decoration: underline;
}
.lh-normal{
  line-height: 1.6em;
}
/* HEADER -------------------------------------- */
.header{
  margin-bottom: 1em;
  padding-top: 1.75em;
}

.header-subtitle{
  margin-bottom: 0.2em;
  font-size: 1.75em;/*28px*/
  font-weight: bold;
}
.header-text{
  margin-bottom: 0.4em;
}
.header h1{
  font-size: 4em;
}
.header h1 img{
  width: 100%;
  height: auto;
}
/* HEADLINE ------------------------------------ */
.headline{
  display: flex;
  align-items: center;
  margin-bottom: 0.5em;
  font-size: 1.75em;
  font-weight: bold;
}
.headline:before,
.headline:after {
    content: "";
    height: 2px;
    flex-grow: 1;
    background-color: #111;
}
.headline:before {
    margin-right: 1rem;
}
.headline:after {
    margin-left: 1rem;
}
/* LIST ---------------------------------------- */
.list-cotainer{
  display: flex;
  justify-content: center;
  align-items: center;
  width: 75%;
  padding: 1em 0;
  margin-right: auto;
  margin-left: auto;
  text-align: left;
  font-size: 1.4em;
  font-weight: bold;
  background-color: #fff;
  border-top: 1px #111 solid;
  border-bottom: 1px #111 solid;
}
.list{
  list-style-type: disc;
}
.list-child{
  padding: 0.25em 0;
}
/* ROUND BOX ----------------------------------- */
.roundedbox{
  display: inline-block;
  padding: 0.6em 0.8em;
  line-height: 1.6em;
  background-color: #fff;
  border: 1px solid #111;
  border-radius: 6px;
}
/* MENU ---------------------------------------- */
#menu{
  padding-top: 0.7em;
}
.whiteBG{
  position: relative;
  padding-bottom: 1.25em;
  background-color: #fff;
  border-bottom: 2px solid #111;
}
.whiteBG .headline{
  position: relative;
  top: -0.55em;
}
/* NAVIGATION ---------------------------------- */
.nav-container{
  display: flex;
  flex-flow: column;
  justify-content: center;
  align-items: center;
  text-align: left;
  font-size: 1.25em;
  font-weight: bold;
}
.nav{
}
.nav a{
  text-decoration: none;
  background-image: linear-gradient(90deg, #111, #111); /* 線の色 */
  background-repeat: no-repeat;
  background-position: center bottom; /* 線の起点を左・下に設定 */
  background-size: 0% 1px; /* 線の横幅を0、縦幅を1pxに */
  transition: background-size 0.3s; /* 線を伸ばすアニメーション実行時間を指定 */
}
.nav a:hover{
  background-size: 100% 2px; /* 線の横幅を100%にする */
}
.nav-list:first-child{
  padding-top: 0;
}
.nav-list{
  padding: 0.4em 0;
}
.nav-list-separator{
  border-top: 1px dashed #111;
}
nav .fanbox{
  background-image: linear-gradient(90deg, #FFC953, #FFC953); /* 線の色 */
}
nav .pixiv{
  background-image: linear-gradient(90deg, #6ABEFA, #6ABEFA); /* 線の色 */
}
/* BUTTON -------------------------------------- */
.btn{
  position: relative;
  overflow: hidden;
  padding: 0.6em 1em;
  color: #fff;
  font-size: 1.25em;
  background-color: #111;
}
.btnripple::after {
  content: "";
  /*絶対配置で波紋位置を決める*/
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  /*波紋の形状*/
  background: radial-gradient(circle, #00D6DA 10%, transparent 10%) no-repeat 50%;
  transform: scale(10, 10);
  /*はじめは透過0に*/
  opacity: 0;
  /*アニメーションの設定*/
  transition: transform 0.3s, opacity 1s;
}
/*クリックされたあとの形状の設定*/
.btnripple:active::after {
  transform: scale(0, 0);
  transition: 0s;
  opacity: 1;
}
.btnripple:hover::after{
  
}

/* VIDEO AREA ---------------------------------- */
#video-area{
  position: fixed;
  z-index: -1;/*最背面に設定*/
  top: 0;
  right:0;
  left:0;
  bottom:0;
  overflow: hidden;
  opacity: 0.25;
}
#video {
  /*天地中央配置*/
  position: absolute;
  z-index: -1;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  /*縦横幅指定*/
  width: 177.77777778vh; /* 16:9 の幅→16 ÷ 9＝ 177.77% */
  height: 56.25vw; /* 16:9の幅 → 9 ÷ 16 = 56.25% */
  min-height: 100%;
  min-width: 100%;
}
/* スマホ対応 ---------------------------------- */
@media screen and (max-width: 480px){
  body{
    font-size: 12px;
  }
  .container{
    width: 100%;
    max-width: 480px;
    overflow: hidden;
  }
  .header h1{
    padding: 0 0.1em;
    font-size: 3.5em;
  }
  .list-cotainer{
    min-width: 360px;
  }
  .btn{
    font-size: 1.4em;
  }
  .nav-container{
    font-size: 1.4em;
  }
  .nav-list{
    padding: 1em 0;
  }
  footer p{
    font-size:0.95em;
  }
  footer small{
    font-size:14px;
  }
}