style.css

body {
  padding: 2rem;
  font-family: -apple-system, BlinkMacSystemFont, "Arial", sans-serif;
}

h1 {
  font-size: 16px;
  margin-top: 0;
}

p {
  color: rgb(107, 114, 128);
  font-size: 15px;
  margin-bottom: 10px;
  margin-top: 5px;
}

.card {
  max-width: 620px;
  margin: 0 auto;
  padding: 16px;
  border: 1px solid lightgray;
  border-radius: 16px;
}

.card p:last-child {
  margin-bottom: 0;
}

.toast{
  position:fixed;
  bottom:18px;
  left:50%;
  transform:translateX(-50%);
  background:rgba(15,23,42,.92);
  border:1px solid rgba(124,245,220,.25);
  color:#e7eefc;
  padding:10px 14px;
  border-radius:12px;
  font-size:13px;
  z-index:9999;
}