body    {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    background-color: #29343d;
    text-align: center;
}
div {
    margin: 2.3vw auto 1vw;
}
button  {
    padding: 1vw;
    margin: 2vw;
    background-color: #29343d;
    color: rgba(4,137,255,0.8);
    font-size: 1.5vw;
    font-weight: bolder;
    border-radius: 1rem;
    text-shadow: 0 0 10px rgba(0,0,0,0.8);
    box-shadow: 0 0 10px rgba(255,240,180,0.8);
}
button:hover    {
    background-color: rgba(92,116,136,0.2);
}
button>a{
    text-decoration: none;
}
button>a:hover    {
    color: rgba(4,137,255);
    font-size: 1.7vw;
    transition: 1s;
}