body{
    background:#0d1117;
    color:white;
    font-family:Arial,Helvetica,sans-serif;
    text-align:center;
    margin-top:100px;
}

.container{
    width:700px;
    margin:auto;
}

h1{
    color:#00ff99;
    font-size:55px;
}

h2{
    color:#58a6ff;
}

p{
    font-size:20px;
}

button{
    padding:12px 30px;
    background:#00ff99;
    color:black;
    border:none;
    border-radius:5px;
    font-size:18px;
    cursor:pointer;
}

button:hover{
    background:#00cc77;
}