*{
  box-sizing: border-box;
}

body{
    background: beige;
    font-family: Arial, Helvetica, sans-serif;
    margin:0;
}
/* Mobile First View */
header {
    background-color: black;
    overflow: hidden;
}

h1 {
    color: white;
    float: left;
    padding: 0 20px;
  /*  text-align: center;*/
    width: 100%;
}

#hamburger_checkbox {
    display: none;
}

#hamburger_image {
    background-color: white;
    display: block;
    margin-bottom:20px;
    margin-left:auto;
    margin-right:auto;
    padding: 10px;
    width:10%;
}
/*Show the menu*/
#hamburger_checkbox:not(:checked) + nav {
    display:none;
}

nav a{
    color: white;
    float: left;
    font-size:17px;
    padding: 30px 20px;
    text-align:center;
    text-decoration:none;
    width:100%;
}
/*Invert colors on mouse hover*/

nav a:hover{
    background-color: white;
    color: black;
}

/*Invert colors on tab key focus*/
nav a:focus{
    background-color: white;
    color: black;
    outline:none;
}

/*Highlight the current link*/
.active_nav {
    background-color: blue;
    color:white;
}



/* Medium devices (landscape tablets, 768px and up) */
@media only screen and (min-width: 768px) {

    /*hide the hamburger menu*/
    #hamburger_image{
        display: none;
    }

    /*show the nav links*/
    #hamburger_checkbox:not(:checked)+ nav {
        display: block;
    }

    h1{
        text-align: left;
        width: 700px;
    }

    nav {
        float: right;
    }

    nav a{
        width : auto;
    }
}