html {
  scroll-behavior: smooth;
}
body {
  max-width: 480px;
  margin: 0 auto;
  background-color: #000;
  font-family: serif;
  font-size: 1.2rem;
  color: #ccc;
}
.bg_pattern {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: #000;
  z-index: -1;
  animation:
    loading 8s,
    bgmove 20s linear infinite;
}
.ichimatsu {
  background-image: url("seigaiha.webp");
  background-position: 0 0;
  background-size: 561px 310px;
}
@keyframes loading {
  0% {opacity: 0;}
  100% {opacity: 1;}
}
@keyframes bgmove {
  from { background-position: 0 0;}
  to { background-position: 0 -310px;}
}
.tokonoma {
  width: 390px;
  margin: 0 auto;
}
.bgsize {
  display: none;
}
.kakejiku {
  box-sizing: border-box;
  width: 154px;
  height: 390px;
  margin: 0 auto;
  overflow: hidden;
  aspect-ratio: 1 / 1;
  animation: wipe 3s ease 0.5s 1 normal both;
}
@keyframes wipe {
  0% { transform: translateY(-400px); }
  100% { transform: translateY(0px); }
}
.ksize {
  width: 154px;
  animation: wipe2 3s ease 0.5s 1 normal both;
}
@keyframes wipe2 {
  0% { transform: translateY(400px); }
  100% { transform: translateY(0px); }
}
.box {
  box-sizing: border-box;
  text-align: center;
  width: 390px;
}
.name {
  animation: loading 1s ease 3.5s 1 normal both;
  margin: 30px 0 0 0;
  font-family: sans-serif;
  font-size: 1.4rem;
  color: #fff;
}
.kana {
  animation: loading 1s ease 4.5s 1 normal both;
  margin: 30px 0 0 0;
}
.roma {
  animation: loading 1s ease 5.5s 1 normal both;
  margin: 12px 0 0 0;
}
.com {
  animation: loading 1s ease 6.5s 1 normal both;
  margin: 30px 0 0 0;
}
.back {
  position: fixed;
  top: 10px;
  right: 4px;
  background: #000;
  color: #ccc;
  border: 1px solid #666;
  padding: 1px 2px;
  font-family: serif;
  font-size: 1.2rem;
  border-radius: 6px;
  z-index: 1;
}