* {
  -webkit-box-sizing: border-box;
          box-sizing: border-box;
  padding: 0;
  margin: 0;
}

img {
  width: 100%;
  display: block;
}

html, body {
  overflow: hidden;
  width: 100%;
  height: -webkit-fill-available;
}

.block-wrapper {
  position: relative;
  width: 100%;
  height: 100%;
}

.app {
  width: 100%;
  overflow: hidden;
  position: relative;
  background: #271d1c;
  display: block;
  height: 100vh;
  /* Fallback for browsers that do not support Custom Properties */
  text-decoration: none;
  background-image: url(../image/bg.jpg);
  background-size: cover;
  background-position: top;
  background-repeat: no-repeat;
}

.main-container {
  margin: 0 auto;
  height: 100%;
  width: 100%;
  position: relative;
}

.notice {
  position: absolute;
  top: -0.7%;
  width: 40%;
  left: 30%;
}

.cards {
  position: absolute;
  top: 15%;
  left: 0;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  width: 50%;
  left: 25%;
  -webkit-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
}

.cards .card {
  position: relative;
  -webkit-transition: all ease .4s;
  transition: all ease .4s;
}

.cards .card img:last-child {
  position: absolute;
  top: 0;
  left: 0;
  opacity: 0;
  -webkit-transition: all ease .4s;
  transition: all ease .4s;
}

.cards .card:hover {
  -webkit-transform: scale(1.2);
          transform: scale(1.2);
}

.cards .card:hover img:last-child {
  opacity: 1;
}

.cards .card_interval {
  -webkit-transform: scale(1.1);
          transform: scale(1.1);
}

.button {
  position: absolute;
  bottom: 10%;
  width: 20%;
  left: 40%;
  -webkit-animation: btn 1s ease-in-out;
          animation: btn 1s ease-in-out;
  -webkit-animation-iteration-count: infinite;
          animation-iteration-count: infinite;
  -webkit-transition: all ease .5s;
  transition: all ease .5s;
}

.button img {
  -webkit-transition: all ease .5s;
  transition: all ease .5s;
}

.button:hover img {
  -webkit-transform: scale(1.1);
          transform: scale(1.1);
}

@-webkit-keyframes btn {
  from {
    -webkit-transform: translateY(0);
            transform: translateY(0);
  }
  50% {
    -webkit-transform: translateY(5%);
            transform: translateY(5%);
  }
  to {
    -webkit-transform: translateY(0);
            transform: translateY(0);
  }
}

@keyframes btn {
  from {
    -webkit-transform: translateY(0);
            transform: translateY(0);
  }
  50% {
    -webkit-transform: translateY(5%);
            transform: translateY(5%);
  }
  to {
    -webkit-transform: translateY(0);
            transform: translateY(0);
  }
}