:root{
    --color:#0060ad;
    --btn-height:50px;
}

*{
    font-family: Arial, Helvetica, sans-serif;
}
main{
    width: 100%;
    margin-top: 100px;
}
.optionWrapper{
    width: 80%;
    min-width: 200px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    padding-top:20px;
}
.btn, 
.back{
    width: 200px;
    height: var(--btn-height);
    background-color: var(--color);
    margin-top: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 10px;
}
.btn:hover,
.back:hover
{
    opacity: 0.8;
}
.btn_link{
    text-decoration: none;
    text-align: center;
    display: block;
    font-size:1.1em;
    color: white;
    height: 100%;
    width: 100%;
    line-height: var(--btn-height);
}
.btn_link:hover{
    color:white;
    text-decoration: none;
}
.back{
    position: absolute;
    right: 100px;
    top:0;
    width: 100px;
    background-color: var(--color);
    display: block;
}