.title{
    background-image: url('../images/mountains800.jpg'); /* The image used */
    background-color: #CCCCCC; /* Used if the image is unavailable */
    height: 5em; /* You must set a specified height */
    background-position: center; /* Center the image */
    background-repeat: no-repeat; /* Do not repeat the image */
    background-size: cover; /* Resize the background image to cover the entire container */
}