.container {
  width: 1200px;
  margin: 0 auto;
}
.heading {
  background: #41484f;
  border-radius: 8px;
  color: #fff;
  display: inline-block;
  padding: 15px;
  font-family: "Nunito Sans", sans-serif;
}
#textarea {
  width: 100%;
  height: 300px;
  border: 2px solid #4d7191;
  font-family: "Nunito Sans", sans-serif;
  border-radius: 8px;
  background: #0a1929;
  color: #fff;
  font-size: 16px;
  outline: none;
  padding: 15px;
  box-sizing: border-box;
}
.button {
  background: #41484f;
  font-size: 16px;
  border-radius: 8px;
  color: #fff;
  border: none;
  padding: 10px;
  cursor: pointer;
  font-family: "Nunito Sans", sans-serif;
}
.convertcase {
  position: relative;
}
.copy {
  position: absolute;
  top: 10px;
  right: 10px;
  background-color: rgb(21, 136, 62);
}