index.css

body {
    background-image: url("metrosp.jpg");
    background-size: cover;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    font-weight: bold;
    text-align: center;
}

h1 {
    margin-top: 10px;
    margin-bottom: 10px;
    color: #fff;
}

h2 {
    font-size: 50px;
    margin-top: 0;
    margin-bottom: 20px;
    color: #fff;
}

h6{
    color: seashell;
}

p {
    color: #fff
}

button {
    border: none;
    padding-top: 10px;
    padding-bottom: 10px;
    color: black;
    font-weight: bold;
    width: 200px;
    margin-bottom: 5px;
    border-radius: 5px
}

#welcome-el{
    color: seas;
}

#increment-btn{
    background: yellow;
}

#save-btn {
    background: darkgrey;
}