body {
  background-color: #000;
  font-family: "Arial", sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
}

a {
  color: #990000;
}

.page {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
}

.header {
  width: 100%;
  height: 136px;
  position: relative;
}

/* logo */
.logo {
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: 300px;
  height: 79px;
}

.logo img {
  width: 100%;
  height: 100%;
}

article {
  background: #fff;
  padding: 20px;
  margin-bottom: 100px;
}

audio {
  width: 100%;
}

.thumbnail {
  width: 100%;
  background: #f4f4f4;
  aspect-ratio: 16/9;
}

.thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.list {
  display: flex;
  flex-wrap: wrap;
  padding: 0 20px 40px;
}

.list .item {
  width: calc(33.333% - 20px);
  margin: 10px;
  background-color: #fff;
  text-decoration: none;
  position: relative;
  aspect-ratio: 16/9;
}

.list .item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  top: 0;
  left: 0;
}

.list .item .title {
  margin: 0;
  padding: 10px 20px;
  color: #fff;
  position: absolute;
  bottom: 0;
  left: 0;
  width: calc(100% - 20px);
  background: rgba(0, 0, 0, 0.8);
}

iframe {
  max-width: 100% !important;
}

footer {
  color: #fff;
  width: 100%;
  text-align: center;
  padding: 20px 20px 60px;
}

@media only screen and (max-width: 400px) {
  .logo {
    width: 264px;
  }
  .logo h3 {
    top: -1px;
    font-size: 22px;
  }
}

@media only screen and (max-width: 900px) {
  .list .item {
    width: calc(50% - 20px);
  }
}

@media only screen and (max-width: 530px) {
  .list .item {
    width: calc(100% - 20px);
  }
}