style.css

* {
    box-sizing: border-box;
}

body {
    background-color: rgb(214, 230, 244);
    font-family: Arial;
}

div {
    background-color: rgb(16, 117, 45);
    display: inline-block;
    width: 300px;
    height: auto;
    position: absolute;
    left: 50%;
    top:20%;
    transform: translate(-50%, 0);
    text-align: center;
    border-radius: 5px;
    border: 2px solid goldenrod;
}

h1 {
    color: goldenrod
}

p {
    color: white;
    font-weight: bold;
}

button {
    background-color: transparent;
    color: goldenrod;
    border: 2px solid goldenrod;
    border-radius: 3px;
    width: 160px;
    margin-bottom: 5px;
    font-weight: bold;
    padding: 6px;
}

button:active {
    transform: scale(0.98);
}

#message-el {
    font-style: italic;
}

p {
    font-family: 'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande', 'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
}