body {
  height: 98vh;
  width: 99vw;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  font-family: verdana;
  font-size: 5vh;
}

  .main {
  background-color: blue;
  padding: 5vh 5vw;
  border-radius: 2vh;
}

.title {
  margin-bottom: 3vh;
  text-align: center;
}

.temperatures {
  display: flex;
  flex-direction: column;
  justify-content: center;
  font-size: 10vh;
}

.equals {
  margin-left: 2vw;
  margin-right: 2vw;
}

input {
  font-size: 10vh;
  width: 55vw;
  text-align: right;
  margin-right: 0;
  border: 0;
  background-color: lightblue;
}

button {
  background-color: white;
  border: 0;
  font-size: 4vh;
  margin-left: 1vh;
  margin-right: 1vh;
  border-radius: 1vh;
}

.celsius, .farenheit, .kelvin {
  display: flex;
  flex-direction: row;
}

.units {
  width: 15vh;
}

.buttons {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
}

.options {
  text-align: center;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  margin-top: 0.5vh;
  margin-bottom: 2vh;
}

button:hover {
  background-color: silver;
}