body {
    background-image: url(https://th.bing.com/th/id/OIP.ZUrJ7GHaf7AtERO0i3mWbAHaEL?w=327&h=184&c=7&r=0&o=5&dpr=1.3&pid=1.7);
}
.title {
    text-align: center; color: white;
    }
    button {
    border: 0;
    border-radius: 100px;
    font-size: 20px;
    color: blue;
    padding: 25px;
    }
    .header-main {
    width: 100%;
    }
    .h1-main {
        color: yellow;
    }