.box {
    /* Dimensions */
    width: 300px;  /* Sets the width of the content area */
    height: 150px; /* Sets the height of the content area */

    /* Appearance */
    background-color: lightgray; /* Fills the background of the box */
    border: 2px solid black;     /* Adds a solid border around the padding and content */
    border-radius: 10px;         /* Rounds the corners of the box */

    /* Spacing */
    padding: 20px;               /* Creates space between content and border */
    margin: 20px;                /* Creates space outside the border, between this box and other elements */
}