HTMLify

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: sans-serif;
}

body {
  min-height: 100vh;
  background-color: blanchedalmond;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 70px;
}

.container {
  background: #fff;
  padding: 30px 40px;
  border-radius: 10px;
  width: 50%;
}

header h2 {
  font-size: 1.4rem;
}

.para {
  margin-top: 12px;
  font-size: 18px;
}

.para .content-container-2 {
  display: none;
}

.btn {
  background-color: black;
  color: #fff;
  padding: 10px 45px;
  font-size: 1.1rem;
  border-radius: 5px;
  outline: none;
  border: none;
  cursor: pointer;
  margin-top: 15px;
}

/* JavaScript */
.content-container-2.toggle {
  display: block;
}