body {
    background: #2c3e50;
    text-align: center;
}

.container {
    max-width: 600px;
    border: 3px solid #f1c40f;
    box-shadow: 2px 4px 3px 2px;
}

.btn{
    cursor: pointer;
     padding: 10px;
    margin: 5px;
}

img {
    cursor: pointer;
}