@charset "utf-8";
:root {
  --res_fz: 3.125vw;
  --ac_white: #f9f8f8;
  --color-fadeBlind:#eceaea;
  --ac_gray: #e6e4e4;
  --filter_gray: invert(99%) saturate(529%) hue-rotate(70deg) brightness(112%) contrast(75%);
}

body[data-page="acappella"]{
  background-color: var(--ac_white);
}
.res_fz{
  font-size: var(--res_fz);
}
@media (min-width:769px){
  :root {
    --res_fz: clamp(11px,1.430429128vw,14px);
  }
  .self_bloc {
    padding: 6em 0;
  }
  body[data-page="acappella"] .self_wide {
    padding: 0 6em;
  }
}

/* KEY VISUAL ==========================*/
[data-page="acappella"] #page.main_view{
  display: block;
  width: 100%;
  height: 156.25vw
}
.fo_gilda{
  /* font-family: 'Gilda Display', serif; */
  /* font-weight: 400; */
  font-family: "Josefin Sans", sans-serif;
}
.main_acappella_ttl_box{
  position: absolute;
  bottom: 8%;
  left: 0;
  right: 0;
  margin: auto;
  width: 100%;
  height: fit-content;
  text-align: center;
  color: #fff;
  z-index: 10;
}
.main_acappella_ttl{
  font-size: 5em;
}
.acappella_about_ttl span {
  font-size: .4em;
}
.main_acappella_ttl .en1{
  font-size: .5em;
}
.main_acappella_ttl .en2{
  font-size: .35em;
}
.main_acappella_ttl span{
  display: block;
  line-height: 1.2;
}
.main_acappella_ttl .ja{
  display: block;
  font-size: 0.2em;
  font-family: "YakuHanJP",'Noto Sans JP',sans-serif;
}
.ac_keyvis_box{
position: relative;
overflow: hidden;
}
.ac_keyvis_box::before{
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  display: block;
  width: 100%;
  height: 100%;
  background-color: #000;
  opacity: .3;
  z-index: 1;
  /* 
  transition: opacity .5s;
  animation: key_fadeIn forwards 1s ease .5s 1 normal; */
}
.ac_keyvis_box img{
  transform: scale(120%);
  animation: key_scale forwards 3s ease-out  1 normal;
}
@keyframes key_scale {
  0% {transform: scale(120%); opacity:0}
  50% {opacity:1}
  100% {transform: scale(100%); opacity:1}
} 
/* @keyframes key_fadeIn {
  0% {opacity: 0}
  100% {opacity: .3}
} */

@media (min-width:769px){
  [data-page="acappella"] #page.main_view{
    height: 620px;
  }

  .main_acappella_ttl_box{
    bottom: 0;
    top: 6%;
  }
  .main_acappella_ttl {
    font-size: 5.2rem;
  }

}/* 769 */
@media (min-width:1200px){
  [data-page="acappella"] #page.main_view{
    height: 51.6666666vw;
  }
  .main_acappella_ttl {
    font-size: 8vw;
  }

}/* 1200 */


/* ABOUT ==========================*/
.sec_ac_about{
  padding-bottom: 5em;
}
.acappella_about_ttl {
  position: relative;
  font-size: 5.5em;
  margin: 0;
  padding: .5em 0;
  text-align: left;
}
.acappella_about_ttl span.ja {
  display: block;
  font-family: "YakuHanJP",'Noto Sans JP',sans-serif;
  font-weight: bold;
  padding: 0;
  margin: 0 ;
  line-height: 1.6;
  letter-spacing: .02em;
}
.acappella_about_ttl span.ja span{
  font-family: inherit;
  font-size: inherit;
  font-weight: inherit;
  line-height: inherit;
  padding: inherit;
  margin: inherit;
}
.about_ttl_script_img{
  position: absolute;
  bottom: .1em;
  left: 0;
  z-index: -1;
  width: 100%;
  filter: var(--filter_gray);
  transform: rotateZ(-18deg) scale(1.08);
  transform-origin: center;
}
.acappella_txt_block{
  width: 82%;
  margin-left: auto;
}
.acappella_txt_p{
  font-size: 1.4em;
  font-weight: 500;
  padding: 1em 0;
  line-height: 1.8;
}
.txt_palla{
  display: block;
  padding: 0.5em 0;
}
.acappella_img_box{
  position: relative;
  width: 100%;
  margin: 1em 0;
  overflow: hidden;
}
.acappella_img_box::before{
  content: "";
  display: block;
  width: 100%;
  padding-top: 66.6666%;
  background-color: var(--ac_gray);
} 
.acappella_img_box_inner{
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}
.acappella_img{
  object-fit: cover;
  object-position: center;
  width: 100%;
  height: 100%;

  transform: scale(1.2);
}
.on .acappella_img{
  transform: scale(1);
  transition: transform 3s ease-out;
}

@media (min-width:769px){
  .ac_about_wrap{
    display: flex;
    justify-content: space-between;
  }
  .acappella_about_ttl{
    position: sticky;
    width: 50%;
    height: fit-content;
    top: 2em;
    padding-bottom: 2em;
  }
  .ac_about_wrap .acappella_txt_block{
    width: 50%;
  }
  .acappella_about_ttl .ja{
    font-size: .6em;
  }
  .about_ttl_script_img {
    top: 1.4em;
    left: 1em;
    transform: rotateZ(-18deg) scale(1.4);
  }
  .ac_about_txt_box{
    padding-top: 18em;
  }
}/* 769 */

/* FEATURE ==========================*/
.sec_ac_feature .acappella_img_box {
  width: calc(100% + 4em);
  margin-left: -2em;
}
.ac_feature_list{
  position: relative;
}
.ac_feature_list_box{
  padding: 8em 0 1em;
  width: 100%;
  height: 100%;
}

.ac_feat_box_ttl {
  position: relative;
  font-size: 2em;
  padding: .8em 0 .4em;
  letter-spacing: .02em;
  z-index: 1;
}
.sec_ac_feature .sec_self_ttl{
  padding-bottom: 0;
  margin-bottom: -1em;
}
.ac_feature_box_desc{
  font-size: 1.1em;
  line-height: 1.6;
  padding: 0.5em 0;
}
.ac_feat_box_ttl_num{
  position: absolute;
  top: -60%;
  left: 0;
  z-index: -1;
  width: 50%;
  filter: var(--filter_gray);
  transform: rotateZ(-5deg);
  transform-origin: center;
  opacity: .75;
}
.ac_feature_box_desc .txt_palla{
  transform: translateX(-2%);
  opacity: 0;
  transition: transform .6s , opacity .3s;
}
.ac_feature_box_desc .txt_palla:last-child{
  transition: transform .6s .5s, opacity .3s .5s;
}
.on .ac_feature_box_desc .txt_palla{
  opacity: 1;
  transform: translateX(0);
}

/* 操作用 ================*/
.observer_box{
  height: 80vh;
}
.observer_box:not(:first-of-type) .ac_feature_list_box{
  opacity: 0;
}
.ac_feature_list_box{
  transition: opacity .5s ease ,transform .3s ease ;
}
.observer_box:not(:first-of-type) .ac_feature_list_box{
  transform: translateY(3em);
}
.observer_box.on .ac_feature_list_box{
  transform: translateY(0);
  opacity: 1;
  position: fixed;
  top: 0;
  left: 0;
  z-index: -1;
}
/* 最後の要素のみstaticで通過 => 複雑になるので変更 */
.observer_box:last-of-type{
  height: 100vh;
}
.observer_box:last-of-type .ac_feature_list_box{
  padding: 8em 0 4em;
}
/* 
.observer_box:last-of-type.on .ac_feature_list_box{
  position: static;
}
 */

/* 後の要素に背景入れる */
.observer_next_block{
  background-color: #fefefe;
  filter: drop-shadow(0 -0.1em 1em rgba(50,50,50,.05));
}

/* feature nav bar */
.ac_feature_nav,
.ac_feature_nav_last{
  position: fixed;
  top: calc(8em + 24vw);
  right: 0;
  margin: auto;
  height: fit-content;
  z-index: 10;

  visibility: hidden;
  opacity: 0;
  transition: opacity .5s;
}
.observer_box.on ~ .ac_feature_nav{
  visibility: visible;
  opacity: 1;
}
.ac_feature_nav_last{
  position: absolute;
  visibility: visible;
  opacity: .8;
  top: 0;
  bottom: 0;
}
.ac_feature_nav_bar{
  display: block;
  width: 1.5em;
  height: 4px;
  background-color: #eee;
  margin: 1em 0 1em auto;
  opacity: .5;
  transition: width .5s , opacity .5s;
}
/* .ac_feature_nav_bar.on, */
.observer_box:first-of-type.on ~ .ac_feature_nav .ac_feature_nav_bar:first-child,
.observer_box:nth-of-type(2).on ~ .ac_feature_nav .ac_feature_nav_bar:nth-child(2),
.observer_box:nth-of-type(3).on ~ .ac_feature_nav .ac_feature_nav_bar:nth-child(3),
.observer_box:last-of-type.on ~ .ac_feature_nav .ac_feature_nav_bar:last-of-type,
.observer_box:last-of-type.on .ac_feature_nav_last .ac_feature_nav_bar:last-of-type{
  width: 2.4em;
  opacity: 1;
}

.observer_box:last-of-type.on ~ .ac_feature_nav{
  visibility: hidden;
  opacity: 0;
}

@media (min-width:769px){
  .sec_ac_feature .sec_self_ttl{
    margin-bottom: -3em;
    padding-top: 0;
  }
  .ac_feature_list_box {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2em 0 0;
  }
  .ac_feature_list_box_inner{
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-direction: row-reverse;
    width: 100%;
    height: 100vh;
  }
  .sec_ac_feature .acappella_img_box {
    width: 48%;
    margin-left: 0;
  }
  .acappella_detail_box{
    width: 47%;
  }
  .acappella_txt_block{
    width: 100%;
  }
  .ac_feat_box_ttl {
    font-size: 2.4em;
  }
  .ac_feat_box_ttl_num {
    top: -40%;
    left: -.8em;
    width: 40%;
  }
  .ac_feature_list_box .acappella_img_box::before {
    padding-top: 80%;
  }
  .observer_box:last-of-type .ac_feature_list_box {
    padding: inherit;
  }
  .observer_box:last-of-type {
    height: calc(100vh + 6em);
  }
  .ac_feature_nav{
    top: 3em;
    bottom: 0;
    right: 6em;
  }
  .observer_next_block {
    margin-top: 6em;
  }
}/* 769 */

@media (min-width:1300px){
  .ac_feature_nav {
    right: calc(6em + ((100vw - 1316px) / 2) );
}
}/* 1300 */


/* STUDIO ==========================*/
.self_detail_studio_link{
  background-color: var(--ac_gray);
}
.self_studio_detail_ttl_wrap .en{
  font-family: "Josefin Sans", sans-serif;
}
@media (min-width:769px){
  .acappella_img_block{
    width: 50%;
  }

}/* 769 */