html {
  scroll-behavior: smooth;
}
body {
  animation: loading 0.5s;
  max-width: 800px;
  margin: 0 auto;
  background-color: #000;
  font-family: serif;
  font-size: 1.2rem;
  color: #ccc;
}
@keyframes loading {
  0% {opacity: 0;}
  100% {opacity: 1;}
}
a {
  color: inherit;
}
p {
  padding: 0 10px;
}
ul {
  padding: 0 10px 0 1.5em;
}
.bg_pattern {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: #ffffff;
  opacity: 0.08;
  z-index: -1;
}
.ichimatsu {
  background-image:  repeating-linear-gradient(45deg, #000000 25%, transparent 25%, transparent 75%, #000000 75%, #000000), repeating-linear-gradient(45deg, #000000 25%, #ffffff 25%, #ffffff 75%, #000000 75%, #000000);
  background-position: 0 0, 20px 20px;
  background-size: 40px 40px;
}
.back {
  position: fixed;
  top: 32px;
  right: 32px;
  background: #000;
  color: #ccc;
  border: 1px solid #666;
  padding: 1px 2px;
  font-family: serif;
  font-size: 1.2rem;
  border-radius: 6px;
  z-index: 1;
}
.post {
  margin: 32px 0 0 10px;
  font-size: 1rem;
}
.title {
  margin: 20px 0 0 10px;
  font-family: sans-serif;
  font-size: 1.6rem;
  color: #fff;
}
.date {
  margin: 0 0 30px 10px;
  font-family: sans-serif;
  font-size: 1.4rem;
  color: #fff;
}
.subtitle {
  margin: 0 0 10px 10px;
  font-size: 1.2rem;
}
.flyer {
  text-align: center;
}
.fsize {
  width: 100%;
  height: auto;
  max-width: 720px;
}
.midashi {
  font-family: sans-serif;
  color: #fff;
}
.tachimi {
  font-size: 1.1rem;
}
.form {
  text-decoration: underline;
  color: #FFB429;
}
.kyocho {
  color: #FFB429;
}
.fb {
  display: block;
  text-decoration: none;
  margin: 16px 0 16px 20px;
}
.flex1 {
  display: flex;
  align-items: center;
}
.gm {
  text-align: center;
}
.gmsize {
  width: 640px;
  height: 480px;
}
.foot {
  margin: 30px 0;
  text-align: center;
  font-family: serif;
  font-size: 0.8rem;
}
.hline {
  border: 1px solid #666666;
}
.youtube {
  width: 640px;
  margin: 0 auto;
  aspect-ratio: 16 / 9;
}
.youtube iframe {
  width: 100%;
  height: 100%;
}