body {
  background-color:white; 
  color:black;
  font-family: sans-serif;
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
.header {
  z-index:999;
  position:fixed;
  top:0;
  width:100%;
  max-height:70px;
  box-sizing: border-box;/*padding含む*/
  padding:5px 4%;
  background-color:rgba(19, 47, 86, 0.9);
  color:white;
  align-items: center;/*縦中央*/
  display:flex;
  justify-content:space-between;
  box-shadow:0px 1px 5px black;
}
.site-name {
  font-size:1.5em;
  font-weight:bold;
}
.taisyo {
  background-color:white;
  color:rgba(19, 47, 86, 1);
  padding:2px 5px;
  border-radius:15px;
  align-self: flex-end;
}

.main-content {
  margin-top:70px
}

.top-content {
  padding:40px 4%;
  text-align:center;
}

/* 🟧pc画面🟧 */
@media (min-width: 768px){
  .top-content {
    position: relative;  /* 背景用レイヤーの基準 */
    overflow: hidden;    /* はみ出し防止 */
    /*文字.text-area下寄せ*/
    display: flex;
    align-items: flex-end;
    justify-content: center;
  }
  .text-area {
    position: relative;
  }
  .pc-font-size{
    font-size:3em;
  }
  /* 背景画像レイヤー */
  .bg { position:absolute; top:0; left:0; bottom:0; z-index:0; pointer-events:none;}
  .bg-img {
    display:block;
    width:100%;            /* 要素ボックス全体を使う */
    height:100%;           /* 要素ボックス全体を使う */
    object-fit: contain;   /* 切らずにボックス内に収める */
    object-position: left center; /* 左寄せで中央揃え */
    -webkit-mask-image: linear-gradient(to right, rgba(0,0,0,1) 0%, rgba(0,0,0,1) 60%, rgba(0,0,0,0) 100%);
    mask-image: linear-gradient(to right, rgba(0,0,0,1) %, rgba(0,0,0,1) 60%, rgba(0,0,0,0) 100%);
    -webkit-mask-repeat: no-repeat;
    mask-repeat: no-repeat;
    -webkit-mask-size: 100% 100%;
    mask-size: 100% 100%;
    -webkit-mask-position: left center;
    mask-position: left center;
  }
  .trial-lesson { 
    height:100%;
    align-self: center; /* 中央 */
  }
}

/* 🟧スマホ画面🟧 */
@media (max-width: 767px){
  .top-content {
    position: relative;
    min-height: 450px;
    overflow:hidden;
  }
  /* テキスト部分 */
  .text-area {
    position: relative;
    z-index: 1;
    margin-top: 250px;
    padding: 0 4%;      /* 左右4%の余白 */
  }
  .pc-font-size{font-size:2em}
  /* 背景画像 */
  .bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 0;
    pointer-events: none;
  }
  .bg-img {
    display: block;
    width: 100%;           /* 横幅いっぱいに表示 */
    height: auto;
    object-fit: cover;      /* 画像の比率を保持してボックスに収める */
    object-position: top center; /* 上側を表示 */
    /* 下だけ透明にするマスク */
    -webkit-mask-image: linear-gradient(to bottom, rgba(0,0,0,1) 0%, rgba(0,0,0,1) 35%, rgba(0,0,0,0) 100%);
    mask-image: linear-gradient(to bottom, rgba(0,0,0,1) 0%, rgba(0,0,0,1) 35%, rgba(0,0,0,0) 100%);
    -webkit-mask-repeat: no-repeat;
    mask-repeat: no-repeat;
    -webkit-mask-size: 100% 100%;
    mask-size: 100% 100%;
    -webkit-mask-position: top left;
    mask-position: top left;
  }
}

.bg {
  z-index:0;
  pointer-events: none;
}
.text-area {
   z-index: 1;   /* 背景より前に表示 */
}
.trial-lesson {
  background-color:#FFEB70;
  padding:20px 4%;
  text-align:center;
}
.trial-lesson h1{
  margin-bottom:10px
}

.about{
  padding:40px 4%;
  background-color:#EFEADD;
    /*格子*/
  background-image: linear-gradient(0deg, transparent calc(100% - 1px), #DDD8CD calc(100% - 1px)),
                    linear-gradient(90deg, transparent calc(100% - 1px), #DDD8CD calc(100% - 1px));
  background-size: 15px 15px;
  background-repeat: repeat;
  background-position: center center;/*格子ここまで*/  
}
.about h2 {
  color:#003579;
  text-align:center;
}
.about-section {
  margin:35px auto;
}
.about-section:last-of-type {
  margin-bottom:0
}
.about-section-title{
  background-color:white;
  color:#003579;
  font-size:1.2em;
  font-weight:bold;
  padding-right:0.5em;
  margin-bottom:8px;
  display:flex;
}
.about-section-title>div:first-of-type {
  background-color:#C95638;
  color:white;
  width:2em;
  align-self: stretch;/*親要素に高さ合わせる*/
  margin-right:0.5em;
  display:flex;/*縦中央*/
  align-items:center;/*縦中央*/
  justify-content:center;/*左右中央*/
}

/* 🟧pc画面🟧 */
@media (min-width: 768px){
  .pc-yokonarabe {
    display:flex;
    justify-content:space-between;
    gap:4%
  }
  .pc-yokonarabe>div {
    width: calc(50% - 2%); /* gapの半分を引く */
  }
  
  .pc-yokonarabe-1 {
    display:flex;
    align-items: stretch;/*子要素の高さ揃える*/
    justify-content:space-between;
  }
  .pc-yokonarabe-1 .top-content {
    width:70%;
  }
  .pc-yokonarabe-1 .trial-lesson {
    width:30%;
  }
  .footer .pc-yokonarabe-1 {
    gap:60px;
  }
  .footer .pc-yokonarabe-1 .access {
    width:50%;
  }
}

.teacher-intro {
  padding:40px 0;
}
.teacher-intro-caption {
  font-size:1.6em;
  font-weight:bold;
}
.teacher-intro-caption {
  margin:0 20px;/*フェードイン分*/
}
.teacher-intro-caption.fadein-left {
  margin-bottom:3em;
}
.teacher-intro-caption.fadein-right {
  text-align:right
}

.class-detail{
  padding:40px 4%
}
.class-detail h2{
  margin-bottom:10px;
  border-left:solid 8px rgba(19, 47, 86, 1);
  padding-left:10px;
}
.class-detail table{
  text-align: center;
  margin-top: 15px;
  margin-bottom:15px;
}
.class-detail th, .class-detail td{
  padding:0.5em
}
.class-detail th {
  background-color:#9D8F82;
  color:white
}

.student-voice {
  /*格子*/
  background-image: linear-gradient(0deg, transparent calc(100% - 1px), #474747 calc(100% - 1px)),
                    linear-gradient(90deg, transparent calc(100% - 1px), #474747 calc(100% - 1px));
  background-size: 15px 15px;
  background-repeat: repeat;
  background-position: center center;/*格子ここまで*/  
  background-color:#323232;
  padding:40px 0;
  color:white
}
.student-voice-section{
  background-color:#151d28;
  padding:10px;
  border-radius:10px;
  box-shadow:0px 0px 5px black;
  color:white;
  margin-top:2em; margin-bottom:2em;
}
.student-voice-section:last-of-type {margin-bottom:0}
.student-voice-section>div:first-child {
  border-bottom:solid 1px white;
  margin-bottom:10px;
}
/* 🟧スマホ画面🟧 */
@media (max-width: 767px){
  .student-voice-section{margin-left:2%;margin-right:2%}
}
/* 🟧pc画面🟧 */
@media (min-width: 768px){
  .student-voice .pc-yokonarabe{margin:0 4%}
}
.student-name{font-weight:bold;font-size:1.2em}
.student-name>span {font-size:1rem;font-weight:normal;margin-left:5px}
.school-name{font-weight:bold;font-size:1.5em;text-align:center}


.faq{padding:40px 0}
.faq-section {
  box-shadow:0px 0px 5px black;
  border-radius:5px;
  margin:20px 6%;
  padding:10px
}
.faq-section summary {
  font-size:1.2em;font-weight:bold;
  border-bottom:1px solid black;
}
.faq-section details>div{margin-top:10px}

/*🟧スマホでのみ表示画像🟧*/
.sp-only {display: none;}
@media (max-width: 767px) {
  .sp-only {margin-bottom:50px;display:block;padding:0 4%}
  picture img{width:100%;display:block;pointer-events: none;}
}

/*▼footer▼*/
.footer {
  padding:30px 4%;
  background-color:#FFEB70;
}
.footer .copyright {
  font-size:0.8em;
  color:#abb8c8;
  margin:30px auto 0 auto;
  text-align:center;
}
/* 🟧スマホ画面🟧 */
@media (max-width: 767px){
  .header-pc {display:none;}
  .footer .access {margin-top:60px;padding:0 2%}
}
.footer .contact {
  display:flex;
  justify-content:space-between;
  background-color:white;
  align-items:center;
  align-items:stretch;
  margin-top:20px
}
.footer .contact-left {
  background-color:#524E46;
  padding:10px;
  color:white;
  flex-direction:column; 
  justify-content:center;
  display:flex
}
.footer .contact-right {
  color:black;
  padding:10px;
  flex:1
}
/*▲footer▲*/


/*▼▼▼フェードイン▼▼▼*/
/* 🟧スマホ画面🟧 */
@media (max-width: 767px){
  .fadein {
    opacity: 0;
    transform: translate(0, 0);
    transition: all 1.5s;
  }
  body {
    overflow-x: hidden;
  }
  .fadein.fadein-left {transform: translate(-20px, 0);}
  .fadein.fadein-right {transform: translate(20px, 0);}
  .fadein.fadein-up {transform: translate(0, -20px);}
  .fadein.fadein-bottom {transform: translate(0, 20px);}
  .fadein.scrollin {
    opacity: 1 !important;
    transform: translate(0, 0) !important;
  }
}
/*▲▲▲フェードイン▲▲▲*/



/*▼▼▼ポヨポヨアニメーション▼▼▼*/
.poyopoyo {
  display: inline-block;
  animation: poyopoyo 2s ease-out infinite;
  opacity: 1;
}
@keyframes poyopoyo {
  0%, 40%, 60%, 80% {
    transform: scale(1.0);
  }
  50%, 70% {
    transform: scale(0.95);
  }
}
/*▲▲▲ポヨポヨアニメーション▲▲▲*/