:root {
  --footer-height: 0px;
  --logo-space: 0px;
}

body {
  display: grid;
  grid-template-rows: 1fr var(--footer-height);
  background: url(/img/top/records_bg.png) repeat;
  background-size: 20rem 20rem;
  -webkit-animation: noise 6s steps(6) infinite;
          animation: noise 6s steps(6) infinite;
}

.l-kv {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  position: relative;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  width: 100%;
  height: 100dvh;
  padding: 4rem 0;
  overflow: hidden;
}

.l-kv_logo {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
}

.l-kv_logo_wrapper {
  position: relative;
  aspect-ratio: 432/159;
  width: 34.2rem;
  margin: 0 auto var(--logo-space);
}

.l-kv_video {
  visibility: hidden;
  position: absolute;
  right: 3rem;
  bottom: 3rem;
  width: 40rem;
  opacity: 0;
}

.l-kv_video_iframe {
  aspect-ratio: 560/315;
  width: 100%;
  border: 1px solid #000;
}

@-webkit-keyframes noise {
  0%,100% {
    background-position: 0 0;
  }
  10% {
    background-position: -5% -10%;
  }
  20% {
    background-position: -20% 5%;
  }
  30% {
    background-position: 10% -25%;
  }
  40% {
    background-position: -5% 25%;
  }
  50% {
    background-position: 15% 10%;
  }
  60% {
    background-position: -10% -5%;
  }
  70% {
    background-position: -15% 15%;
  }
  80% {
    background-position: 5% 10%;
  }
  90% {
    background-position: 20% 20%;
  }
}

@keyframes noise {
  0%,100% {
    background-position: 0 0;
  }
  10% {
    background-position: -5% -10%;
  }
  20% {
    background-position: -20% 5%;
  }
  30% {
    background-position: 10% -25%;
  }
  40% {
    background-position: -5% 25%;
  }
  50% {
    background-position: 15% 10%;
  }
  60% {
    background-position: -10% -5%;
  }
  70% {
    background-position: -15% 15%;
  }
  80% {
    background-position: 5% 10%;
  }
  90% {
    background-position: 20% 20%;
  }
}

@media screen and (max-width: 48em) {
  .l-kv {
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
        -ms-flex-direction: column;
            flex-direction: column;
    padding: 6.5rem 0;
  }
  .l-kv_wrapper {
    position: relative;
    width: 100%;
  }
  .l-kv_logo_wrapper {
    width: 28rem;
  }
  .l-kv_video {
    right: 0;
    bottom: 0;
    left: 0;
    width: calc(100% - 4rem);
    max-width: 40rem;
    margin: 0 auto;
  }
}