body {
    background-color: #dddddd;
}

.container {
    background-color: whitesmoke;
    padding: 0;
    max-width: 1100px;
}

.container-content {
    padding: 20px;
}

.btn-primary {
    background-color: green;
}

img {
    max-width: 100%;
    width: 100%;
}