* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: silver;
    background-image: url("images/_s_a12Cb104c12Cd104e0f0g64hC5C5C5ADADAD999999878787B5B5B5A3A3A3iEBj0k64l106m106.jpg");
}

#container {
    width: 85%;
    margin: 20px auto;
    border: 3px solid black;
    box-shadow: 4px 4px 5px hsla(0, 0%, 0%, 0.35);
}

header {
    background-color: yellowgreen;
}

main {
    background-color: white;
    padding: 15px;
}

footer {
    text-align: center;
    background-color: hsl(0, 0%, 60%);
    padding: 10px;
}

nav {
    background-color: silver;
    text-align: center;
}

.row {
    display: flex;
}

img.iconimg {
    margin-left: 20%;
    margin-bottom: 3%
}

@media screen and (max-width: 1200px) { 
    #container {
        width: 100%;
        margin: 0;
        border: 0;
    }
}