index.css

.naming_conversion {
  margin: 2em;
  padding: 1.4em;
  background: tomato;
  border-radius: 16px;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}

.naming_conversion .cases_div {
  border-radius: 16px;
  padding: 0.7em;
}

.naming_conversion #text {
  margin: 0em 0em 1.4em;
  outline: 0;
  border-radius: 16px;
  box-shadow: none;
  border: navajowhite;
  padding: 0.5em 1.4em;
  width: 40%;
}

.cases_div {
  display: flex;
  justify-content: flex-start;
  flex-direction: column;
}

.case_div {
  width: 100%;
  background-color: cadetblue;
  border-radius: 12px;
  margin: 0.5em 0em;
  padding: 0.5em;
}

.case_div h1 {
  font-size: 1em;
  font-weight: 500;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  padding: 0em;
  margin: 0em;
}

.case_div p {
  font-size: 1.2em;
  font-weight: bold;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  padding: 0em;
  margin: 0em;
  color: black;
}

#convert-btn {
  outline: none;
  box-shadow: none;
  border: none;
  border-radius: 12px;
  padding: 0.3em 1.4em;
  cursor: pointer;
}