html, body, iframe {
  margin: 0;
  padding: 0;
  font-family: "Noto Sans JP", sans-serif;
}

* {
  margin: 0;
  padding: 0;
  overflow: hidden;
  height: 100vh;
}

iframe {
  border: none;
  width: 100%;
  height: 100% !important;
}

.logo {
  width: 120px;
  height: 120px;
  margin: 0 auto;
  text-align: center;
}
.logo img {
  width: 100%;
  height: auto;
}

#overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.9);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}

.overlay-content {
  position: relative;
  color: #fff;
  background-color: #000;
  width: 100%;
  text-align: center;
}

.overlay-text {
  position: absolute;
  top: 0;
  color: #fff;
  text-align: left;
  padding: 2rem;
  font-size: 1.2rem;
  line-height: 1.8;
  padding-top: 80px;
}
.overlay-text p {
  position: relative;
  display: inline-block;
  height: auto;
  margin-bottom: 20px;
  font-size: 13px;
}

.overlay-close {
  position: absolute;
  top: 20px;
  right: 20px;
  font-size: 48px !important;
  color: #ccc;
  cursor: pointer;
  font-weight: bold;
  z-index: 10;
}

.overlay-close:hover {
  color: #fff;
}