body {
  background-color: #e3f6f5;
  color: #272343;
  font-family: -apple-system, BlinkMacSystemFont, Roboto, "Segoe UI",
    "Helvetica Neue", HelveticaNeue, YuGothic, "Yu Gothic Medium", "Yu Gothic",
    Verdana, Meiryo, sans-serif;
}
#containter {
  text-align: center;
}
.non-center {
  max-width: 320px;
  margin: 0 auto;
}
.non-center > * {
  text-align: left;
}
.card {
  background-color: #fffffe;
  border-radius: 5px;
  padding: 15px;
}
h1 {
  font-size: 64px;
  color: #272343;
}
p {
  font-size: 14px;
  color: #2d334a;
}
ul {
  list-style: none;
  padding-inline-start: 1em;
}
#sbox {
  margin: 12px;
  padding: 10px;
  color: #2d334a;
  background-color: #fffffe;
  font-size: 20px;
  max-width: 320px;
  height: 26px;
  border-radius: 5px;
}
#sbtn {
  padding: 8px;
  background-color: #ffd803;
  color: #272343;
  width: 80px;
  font-size: 16px;
  border: none;
  border-radius: 5px;
}
.iframe {
  position: relative;
  width: 500px;
  height: 500px;
}