body {
  font-family: sans-serif;
  max-width: 700px;
  margin: auto;
  padding: 1.5rem;
  background: #f0f0f0;
}

h1 {
  font-size: 1.5rem;
  margin-bottom: 3rem;
  margin-top: -1rem;
}

h2 {
font-size: 1rem;
margin-bottom: 1rem;
}

textarea, input {
  width: 100%;
  margin-bottom: 1rem;
  padding: 1rem;
  font-size: 1.1rem;
  border: 1px solid #ccc;
  border-radius: 10px;
  box-sizing: border-box;
  background: white;
}

textarea[readonly] {
  background-color: #eef;
  cursor: pointer;
}

@media (max-width: 600px) {
  body {
    padding: 1rem;
  }
}

.copied {
  background-color: #d1ffd1 !important;
}