style.css

.main {
  display: flex;
  flex-direction: column;
  justify-content: center; /* Horizontal centering */
  align-items: center; /* Vertical centering */
  height: 100vh; /* Set height to full viewport height */
}
input {
    width: 54%;
    height: 25px;
    margin: 20px;
    box-shadow: rgb(226, 247, 243) 1px 1px 2px 2px;
    border: none;
}
.container {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  padding: 10px;
  width: 60vw;
  height: 35vh;
 border: 2px solid;
}
.btn{
  display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}
.btn button{
  font-size: 1rem;
  background-color: #8b8a8a;
}
.btn button:hover{
  cursor: pointer;
}
.from,
.to {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 100px;
  padding: 4px;
  box-shadow: rgb(67 38 38) 1px 1px 2px 2px;
}
.from h1, .to h1{
    font-size: 1em;
}
.result h1{
  font-size: 1em;
}