body {
  text-align: center;
  font-family: 'Courier New', Courier, monospace;
  background: linear-gradient(rgb(63, 217, 220) 0%, rgb(238, 248, 248) 100%);
  min-height: 100vh;
}

.container {
  margin: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.bmi {
  width: 350px;
  background-color: #fff;
  padding: 20px;
  border-radius: 10px;
  margin: auto;
}

h2 {
  font-size: 30px;
  font-weight: 600;
}

.text {
  text-align: center;
}

#weight,
#height {
  color: #222f3e;
  text-align: left;
  font-size: 20px;
  font-weight: 200;
  outline: none;
  border: 1px solid black;
  border-radius: 7px;
  width: 200px;
  height: 35px;
}

#weight:focus,
#height:focus {
  width: 250px;
  transition: 0.5s;
}

#result {
  color: #971f1f;
  font-size: large;
  font-weight: 400;
}

#btn {
  font-size: medium;
  font-family: inherit;
  margin-top: 10px;
  border: none;
  background: lightblue;
  width: 150px;
  padding: 10px;
  border-radius: 30px;
  outline: none;
  cursor: pointer;
  transition: 0.5s;
}

#btn:hover {
  transform: scale(1.1);
  transition: 0.5s;
}

table {
  width: 400px;
  border-collapse: collapse;
  margin: 20px auto;
}

tr {
  background: lightblue;
}

th {
  background: #fff;
  color: #000;
  font-weight: bold;
}

td,
th {
  padding: 10px;
  border: 1px solid #000;
  text-align: center;
  font-size: 18px;
}