@charset UTF-8;

/* CSS Document */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  background-color: #555;
  color: #fff;
}
.container {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
}
.container img {
  display: block;
  width: 100%;
  height: auto;
}
footer {
  text-align: center;
  padding: 50px 0;
  background-color: #000;
  color: #fff;
  font-size: 12px;
}
footer ul {
  display: flex;
  justify-content: center;
  list-style: none;
  padding: 0;
  margin-bottom: 16px;
}
footer ul li {
  padding: 0 16px;
  border-right: solid 1px #fff;
}
footer ul li:last-child {
  border-right: none;
}
footer ul li a {
  color: #fff;
  text-decoration: none;
  font-weight: bold;
}
@media screen and (min-width: 768px) {
  footer {
    font-size: 14px;
  }
}

.youtube-area {
  position: relative;
}
.youtube-wrapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  aspect-ratio: 55 / 32;
  display: flex;
  justify-content: center;
}
.youtube-embed {
  aspect-ratio: 51 / 32;
}
.youtube-embed iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.button-area {
  position: relative;
}
.button-wrapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  aspect-ratio: 11 / 2;
  display: flex;
  justify-content: center;
}
.button {
  display: block;
  aspect-ratio: 51 / 10;
}
.button img {
  width: 100%;
  height: 100%;
  display: block;
}
.button:hover img {
  transform: scale(1.02);
  transition: transform 0.5s ease;
}