html {
    font-size: 62.5%;
}

body {
    font-size: 1.6rem;
}

h1 {
    text-align: center;
    font-weight: bold;
    font-size: 3.6rem;
}

h2 {
    font-size: 3rem;
    font-weight: bold;
}

.calculator {
    color: lightgreen;
    font-size: 1.8rem;
    border: 1px solid lightgreen;
    margin-bottom: 1rem;
}

.calculator h3 {
    font-size: 2.4rem;
    padding: 1rem .5rem;
    background-color: #FFFFFF33;
}

.calculator math {
    display: flex;
    padding: 1rem;
    gap: 2rem;
}

.calculator mi {
    padding: .5rem;
    background: #FFFFFF33;
    color: lightgrey;
    border-radius: .5rem;
}

.calculator section {
    padding: 1rem;
}

input, select, option {
    padding: 1rem;
    border: 1px solid white;
    border-radius: .5rem;
    background-color: #333333;
    color: yellow;
    font-size: 1.8rem;
    font-weight: bold;
}

.num-p {
    background: #333333 url('./percentage.svg') right no-repeat;
    background-size: 3rem;
    background-position-x: right;
    padding-right: 3rem;
}

.num-s {
    width: 12rem;
}

.num-m {
    width: 16rem;
}

.num-l {
    width: 20rem;
}

.num-sep {
    display: inline-block;
    width: 20rem;
    text-align: center;
    font-size: 1.8rem;
    font-weight: bold;
}