html,
body{
  height:100%;
  margin:0;
}

body{
  background:#000;
  color:#fff;
  font-family:
    "LINE Seed JP",
    "Hiragino Sans",
    "Hiragino Kaku Gothic ProN",
    "Yu Gothic",
    sans-serif;
}

.gate{
  position:relative;
  min-height:100vh;
  overflow:hidden;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:40px 20px;
  box-sizing:border-box;
}

.gate__bg{
  position:absolute;
  inset:0;
  background:url("../img/preBg.webp") center center / cover no-repeat;
  opacity:0;
  transform:scale(1.06);
  transition:
    opacity 1.8s ease,
    transform 4.8s ease;
}

.gate__overlay{
  position:absolute;
  inset:0;
  background:
    linear-gradient(to bottom, rgba(0,0,0,.22), rgba(0,0,0,.52)),
    radial-gradient(circle at center, rgba(255,255,255,.04), rgba(0,0,0,.20));
  opacity:0;
  transition:opacity 1.4s ease;
}

.hero{
  position:relative;
  z-index:2;
  width:min(100%, 980px);
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  text-align:center;
}

.syncLogo{
  display:block;
  width:min(420px, 74vw);
  height:auto;
  margin:0 auto 28px;
}

.heroCopy{
  width:min(100%, 820px);
}

.heroCopy__lead{
  margin:0 0 18px;
  font-size:clamp(16px, 2vw, 24px);
  line-height:1.9;
  letter-spacing:.08em;
  color:rgba(255,255,255,.92);
}

.heroCopy__title{
  margin:0 0 22px;
  font-size:40px;
  line-height:1.35;
  font-weight:700;
  letter-spacing:.06em;
  color:#fff;
  text-shadow:0 0 24px rgba(255,255,255,.08);
}

.heroCopy__body{
  margin:0 0 18px;
  font-size:clamp(15px, 1.7vw, 22px);
  line-height:1.4;
  letter-spacing:.08em;
  color:rgba(255,255,255,.88);
}

.heroCopy__brand{
  margin:0 0 30px;
  font-size:clamp(18px, 2.2vw, 30px);
  line-height:1.8;
  letter-spacing:.12em;
  font-weight:700;
  color:#fff;
}

.heroCopy__title,
.heroCopy__brand{
  font-kerning:normal;
  font-feature-settings:"kern";
  text-rendering:optimizeLegibility;
}

.heroRecruit{
  margin-top:30px;
}

.heroRecruit__title{
  margin:0 0 14px;
  font-size:clamp(18px, 2.1vw, 28px);
  line-height:1.6;
  font-weight:700;
  letter-spacing:.08em;
  color:#fff;
}

.heroRecruit__btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-width:240px;
  padding:14px 26px;
  border:1px solid rgba(255,255,255,.6);
  color:#fff;
  text-decoration:none;
  font-size:14px;
  letter-spacing:.12em;
  background:rgba(255,255,255,.08);
  backdrop-filter:blur(6px);
  box-shadow:0 10px 30px rgba(0,0,0,.18);
  transition:
    background .25s ease,
    border-color .25s ease,
    transform .25s ease;
}

.heroRecruit__btn:hover{
  background:rgba(255,255,255,.16);
  border-color:#fff;
  transform:translateY(-1px);
}

/* フェード演出 */
.fadeUp{
  opacity:0;
  transform:translateY(22px);
  filter:blur(6px);
  transition:
    opacity .9s ease,
    transform .9s ease,
    filter .9s ease;
}

.fadeUp--1{ transition-delay:.25s; }
.fadeUp--2{ transition-delay:.55s; }
.fadeUp--3{ transition-delay:.85s; }
.fadeUp--4{ transition-delay:1.15s; }
.fadeUp--5{ transition-delay:1.45s; }
.fadeUp--6{ transition-delay:1.75s; }

body.is-ready .gate__bg{
  opacity:1;
  transform:scale(1.02);
}

body.is-ready .gate__overlay{
  opacity:1;
}

body.is-ready .fadeUp{
  opacity:1;
  transform:translateY(0);
  filter:blur(0);
}

/* スマホ最適化 */
@media (max-width: 768px){

  .gate{
    position:relative;
    min-height:100svh;
    padding:56px 18px 36px;
    box-sizing:border-box;
    display:flex;
    align-items:flex-start;
    justify-content:center;
    overflow:hidden;
  }

  .hero{
    width:100%;
    max-width:520px;
    margin:68px auto 0;
    padding-top:0;
  }

  .syncLogo{
    width:62%;
    max-width:230px;
    margin:0 auto 18px;
  }

  .heroCopy{
    max-width:94%;
    margin:0 auto;
  }

  .heroCopy__lead{
    margin:0 0 14px;
    font-size:13px;
    line-height:1.55;
    letter-spacing:.06em;
  }

  .heroCopy__title{
    margin:0 0 16px;
    font-size:18px;
    line-height:1.34;
    letter-spacing:.03em;
  }

  .heroCopy__body{
    margin:0 0 14px;
    font-size:13px;
    line-height:1.7;
    letter-spacing:.05em;
  }

  .heroCopy__brand{
    margin:0 0 18px;
    font-size:16px;
    line-height:1.55;
    letter-spacing:.08em;
  }

  .heroRecruit{
    margin-top:18px;
  }

  .heroRecruit__title{
    margin:0 0 10px;
    font-size:16px;
    line-height:1.45;
    letter-spacing:.06em;
  }

  .heroRecruit__btn{
    width:100%;
    max-width:280px;
    min-width:0;
    padding:12px 16px;
    font-size:13px;
    letter-spacing:.08em;
  }
}

/* モーション軽減 */
@media (prefers-reduced-motion: reduce){
  .gate__bg,
  .gate__overlay,
  .fadeUp{
    transition:none !important;
    transform:none !important;
    filter:none !important;
    opacity:1 !important;
  }
}