body {
    background-color: skyblue;
}

#bg {
    margin: 0 auto;
    margin-top: 100px;
    padding-top: 30px;
    width: 400px;
    height: 250px;
    background-color: pink;
    border-radius: 30px;
    text-align: center;
    color: #eee;
}

p {
    margin: 0 auto;
    width: 250px;
}

#header {
    font-size: 30px;
    font-weight: bold;
}

#rules b {
    color: greenyellow;
}

a {
    text-decoration: none;
    color: black;
    padding: 10px;
    border: 1px solid #eee;
    border-radius: 10px;
    box-shadow: 3px 3px 5px #333;
    transition: 0.3s;
}

a:hover {
    color: red;
}

a:active {
    box-shadow: 1px 1px 5px #333;
}