body {
    text-align: center;
    background-color: pink;
}input {
    width: 10%;
}button {
    font-size: 115%;
    border-radius: 10px;
    background-color: rgb(247, 128, 148);
}button:active {
    font-size: 100%;
    animation-duration: 2ms;
    background-color: pink;
}hr {
    width: 200%;
    height: 10px;
    margin-right: 30px;
    background-color: black;
}

#mainTextTitle {
    text-decoration: underline;
}#ft2cm {
    text-decoration: underline;
    font-size: 120%;
}#cm2ft {
    text-decoration: underline;
    font-size: 120%;
}#cmOutputHolder {
    font-weight: bold;
}#ftOutputHolder {
    font-weight: bold;
}#ftWarning {
    text-decoration: wavy underline;
    font-weight: bold;
    color: red;
    font-size: 110%;
}