body {
    background-color: black;
    color: white;
}

ul {
    display: none;
}

#logo {
    width: 50px;
    height: 50px;
}

#header {
    display: flex;
    justify-content: space-around;
}

#first {
    width: 400px;
}

#second {
    width: 200px;
}

@media screen and (min-width:600px) {
    body {
        background-color: gray;
        color: red;
    }

    ul {
        display: flex;
        justify-content: space-around;
    }

    main {
        display: grid;
        grid-template-columns: 50% 50%;
    }

    #first {
        width: 600px;
    }

    #second {
        width: 300px;
    }
}

@media screen and (min-width:1200px) {
    body {
        background-color: white;
        color: black;
    }

    ul {
        display: flex;
        justify-content: space-around;
    }
    
    main {
        display: grid;
        grid-template-columns: 25% 25% 25% 25%;
    }

    #first {
        width: 800px;
    }

    #second {
        width: 500px;
    }
}