body {
    background-color:aqua;
    padding: 20px;
    
}
.container{
    max-width: 600px;
    margin: auto;
    background-color: slategrey;
    border: 3px solid #000;
    border-radius: 10px;
    
}
h1{
    margin: 20px auto;
    padding: 10px;
    background-color: black;
    width: 360px;
    color: rgb(167, 48, 48);
    text-align: center;
    border-radius: 5px;
    
}
p{
    margin: 20px auto;
    background-color: black;
    color: rgb(255, 8, 0);
    border-radius: 5px;
    width: 280px;
    height: 50px;
    padding: 10px;
    font-size: 1.5em;
    text-align: center;

}
section {
    display: flex;
    justify-content: center;
    
}
s1 s2 {
    justify-content: space-evenly;
    
}
#userInput {
    margin-right: 10px;
    width: 140px;
    height: 25px;
    border-radius: 5px;
    font-size: 1em;
    background-color: aqua;
    text-align: center;

}
#unit {
    margin-left: 10px;
    width: 140px;
    height: 30px;
    padding: 1px;
    border-radius: 5px;
    font-size: 0.85em;
    background-color: aqua;

}
s3 {
    display: flex;
    justify-content: center;
}
button {
    margin-top: 20px;
    background-color: rgb(167, 48, 48);
    border-radius: 5px;
    height: 30px;
    font-weight: 800;
    
}