* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}
h1 {
  background-color: lightgreen;
  padding: 20px;
  box-shadow: 2px 2px 2px rgb(0, 0, 0, 0.1);
}
.container-input {
  padding: 20px;
}
.container {
  margin-top: 1rem;
  padding: 20px;
}
p {
  font-size: 18px;
}
button {
  margin-top: 0.5rem;
  padding: 2px;
}
input {
  margin-top: 5px;
  padding: 2px;
  border-radius: 5px;
}