body {
  background: black;
}

.enter-section {
  display: block;
  position: relative;
  width: 100%;
}

.enter-wrapper {
  display: block;
  position: relative;
  width: 100%;
  min-height: 800px;
}

.enter-container {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  position: relative;
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -ms-flex-wrap: wrap;
      flex-wrap: wrap;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;
}

.enter-logo {
  display: block;
  position: relative;
  width: 200px;
}

.enter-logo img {
  display: block;
  position: relative;
  width: 100%;
  height: auto;
  margin: 10% auto 10%;
}

.enter-text {
  display: block;
  position: relative;
  width: 100%;
  text-align: center;
  color: white;
  font-family: serif;
}

@media screen and (-webkit-min-device-pixel-ratio: 0) {
  .enter-text {
    font-family: 'Noto Serif JP', serif;
  }
}

.enter-buttons {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  position: relative;
  width: 600px;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  margin: 5% auto;
  -webkit-box-orient: horizontal;
  -webkit-box-direction: normal;
      -ms-flex-direction: row;
          flex-direction: row;
}

.enter-buttons-button {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  position: relative;
  width: 45%;
  padding: 10% 20%;
  margin: 0 auto;
}

.enter-buttons-button #yes, .enter-buttons-button #no {
  display: block;
  position: relative;
  margin: 0 auto;
}

.enter-buttons-button #yes::after, .enter-buttons-button #no::after {
  display: block;
  position: absolute;
  top: 50%;
  opacity: 0;
  -webkit-transition: opacity 0.5s;
  transition: opacity 0.5s;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
  content: "";
}

.enter-buttons-button #yes:hover::after, .enter-buttons-button #no:hover::after {
  opacity: 1;
}

.enter-buttons-button #yes img, .enter-buttons-button #no img {
  display: block;
  position: relative;
}

.enter-buttons-button #yes::after {
  width: 202px;
  height: 94px;
  background: url("../img/hover_yes.png") 50% 50% no-repeat;
  background-size: 202px 94px;
}

.enter-buttons-button #no::after {
  width: 168px;
  height: 87px;
  background: url("../img/hover_no.png") 50% 50% no-repeat;
  background-size: 168px 97px;
}