body{
    background-color: #2F3336;
    text-align: center;
    font-size: 30px;
    font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;  
}
#main{
    display: flex;
    justify-content: center;
    align-items: center;
    position: absolute;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
}
.aBtn{
    display: block;
    border: 5px solid #39a5f1;
    width: 70%;
    border-radius: 20px;
    background-color: #1E2225;
    padding: 10px;
    transition: background-color 0.2s;
}
a{
    color: whitesmoke;
    text-decoration: none;
    font-size: 45px;
}
a:visited{
    color: whitesmoke;
    text-decoration: none;
}
a:hover{
    background-color: #2F3336;
}