:root {
  color-scheme: light;
  font-family: Arial, "Microsoft YaHei", sans-serif;
  color: #1e2844;
  background: #edeadf;
}
* { box-sizing: border-box; }
body { margin: 0; }
main {
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding: 24px;
  background-image: radial-gradient(#62718843 .8px, transparent .9px);
  background-size: 16px 16px;
}
.postcard {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: end;
  width: min(100%, 810px);
  min-height: clamp(370px, 58vw, 495px);
  padding: clamp(24px, 5vw, 54px);
  padding-top: 132px;
  border: 1px solid #cecbbb;
  background: #fffdf4;
  box-shadow: 5px 6px 0 #e1dccd, 6px 7px 0 #c6c2b4, 0 14px 36px #37382c12;
}
.stamp {
  position: absolute;
  top: clamp(18px, 4vw, 38px);
  right: clamp(18px, 4vw, 42px);
  width: clamp(60px, 10vw, 88px);
  color: #2643b0;
  transform: rotate(7deg);
}
h1 {
  margin: 0 0 30px;
  max-width: 100%;
  overflow-wrap: anywhere;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(46px, 11vw, 108px);
  font-weight: 400;
  line-height: .98;
  letter-spacing: -.065em;
}
h1 em { display: block; color: #2643b0; }
footer {
  display: flex;
  align-items: center;
  gap: 9px;
  padding-top: 16px;
  border-top: 1px solid #c9c8be;
  font-size: .8rem;
  color: #505665;
}
.dot { width: 8px; height: 8px; flex: none; border-radius: 50%; background: #9b8c62; }
footer[data-connected] .dot { background: #278054; }