body{
    background-color: aliceblue;
}

#bird {
    width: 48px;
    height: 32px;
    background: url('assets/bird_v001_blue_and_yellow.png') no-repeat;
    transform: scale(2);
    margin: 0 auto;
}

.container-fluid{
    height: 100vh;
}

button.btn{
    min-width: 30%;
    margin-top: 8px;
    margin-bottom: 16px;
}