html, body {
  width: 100vw;
  height: 100vh;
  font-size: 100%;
  line-height: 1;
}
.container {
  width: 100vw;
  height: 100vh;
  display: flex;
  flex-direction: column;
}
.upper {
  width: 100vw;
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2vh;
  background: url(../img/start/pixta_67797565_XL_2.jpg) no-repeat 0 0 fixed;
  background-size: cover;
}
.upper img {
  width: 50vh;
  height: auto;
}
.start_button:hover {
  opacity: 0.75;
}
.bottom {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  row-gap: 12px;
  margin-top: auto;
  padding-top: 4vh;
  padding-bottom: 4vh;
  justify-content: center;
  background-color: #fff;
}
.pair {
  display: flex;
  width: 50vw
}
.img_wrapper {
  width: 25vw;
  height: 7.5vw;
  text-align: center;
  justify-content: center;
}
.img_wrapper img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.footer {
  height: 40px;
  padding: 0 3%;
  font-size: 12px;
  font-family: 'Hiragino Kaku Gothic Pro', 'ヒラギノ角ゴ Pro W3', 'メイリオ', 'Meiryo','ＭＳ Ｐゴシック',sans-serif;
  color: #fff;
  background-color: #333;
  display: flex;
  flex-wrap: wrap;
  align-content: center;
  justify-content: space-between;
}
.footer-item {
  width: 50%;
  margin: 5px 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  text-align: center;
  column-gap: 20px;
  flex: 1 1 50%;
}
a {
  display: block;
  white-space: nowrap;
  color: #fff;
  text-decoration: none;
}
.disclaimer {
  background: #33333319 0% 0% no-repeat padding-box;
  opacity: 1;
}
.disclaimer-item {
  padding-right: 8vh;
  padding-left: 8vh;
  padding-top: 1vh;
  padding-bottom: 1vh;
}
.disclaimer-text {
  text-align: left;
  font-size: 12px;
  line-height: 16px;
}
@media screen and (max-width:1024px) {
  .pair { width: 80vw}
  .img_wrapper {
    width: 40vw;
    height: 12vw;
  }
  .bottom {
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    row-gap: 12px;
    margin-top: auto;
    padding-top: 2vh;
    padding-bottom: 2vh;
    justify-content: center;
  }
  .footer {
    height: 50px;
    font-size: 10px;
    background-color: #000;
  }
  .footer-item {
    width: 100%;
    flex: 1 1 100%;
    flex-wrap: wrap;
  }
}
@media screen and (max-width:600px) {
  .upper {
    padding-top: 10vh;
    padding-bottom: 10vh;
  }
  .upper img { width: 90vw; }
  .pair { width: 100vw }
  .img_wrapper {
    width: 50vw;
    height: 15vw;
  }
  .bottom {
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    row-gap: 12px;
    margin-top: auto;
    padding-top: 3vh;
    padding-bottom: 3vh;
    justify-content: center;
  }
}

img.top-txt-img{
  margin-bottom:10px;
}

@media screen and (max-width: 960px) {
  img.top-txt-img{
    margin-bottom:30px;
  }
}