html {overflow:hidden}
body {
    color: #222;
    font-family: 'arial', 'helvetica', sans-serif;
    font-size: 1em;
    line-height: 1.3;
}

h1, h2, h3, h4, nav {
    font-family: 'Orbitron', sans-serif;
}

header {
    background-color: #208193;
    background-image: url(./textuur.JPG);
    background-size: cover;
    height: 100px;
    padding: 1.5em 0.5em;}

header h1 {
    font-size: 2.2em;
}

header a {
    color: white;
    text-decoration: none;
}

nav {
    background-color: #5af1b8;
    font-size: .85em;
}

nav p.menuknop  {
    position: absolute;
    top: 0;
    right: 12px;
    font-family: courier, monospace;
    font-size: 28px;
    line-height: 1;
    margin: 0;
}

nav p.menuknop a {
    color: white;
}

nav ul {
    display: none;
    list-style-type: none;
    padding: 0;
    margin: 0;
}

nav ul li {
    border-top: 1px solid white;
    padding: .8em .4em .6em .4em;
}

nav a {
    color: #222;
    text-decoration: none;
}

nav ul li:hover {
    background-color: #32cdb8;
}

nav ul li.submenu {
    position: relative;
}

nav ul li.submenu > a:after {
    content: " \025BE";
}

nav ul li.submenu:hover ul {
    box-sizing: border-box;
    background-color: #32cdb8;
    display: block;
    width: 50%;
    position: absolute;
    top: 0;
    left: 50%;
    z-index: 2;
}

nav li li:first-child {
    border-top: none;
}

nav li li a:hover {
    color: #2e02aa;
}

article {
    padding: 1em;
}

/* kolommen */
.kolom {display:block; padding:10px 10px 10px 10px; width:44%; margin-left:5px; text-align:justify; float:left; color:#000;}
.kolom img {float:left;}
.clear {clear:both; height:1px;}
/* einde kolommen*/

article {
    height: 295px; /* hoogte van een iphone 5,SE */
    overflow-y:scroll;
}

article h1 {
    color: #386087;
}

article h2 {
    color: #208193;
    margin-top: 1.5em;
}


aside h3, aside h4 {
        color: #02165a;
}


aside {
    background-color: #5af1b8;
    padding: 0 0 1em 0;
    text-align: center;
    overflow-y:Scroll;
}

footer {
    background-color: #208193;
    background-image: url(./textuur.JPG);
    color: white;
    font-size: .95em;
    padding: 2em;
    text-align: center;
    overflow:hidden}

footer a {
    color: white;
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

img.rechts, img.links {
    box-sizing: border-box;
    display: block;
    margin: 0.5em auto;
    max-width: 100%;
}

.icon
{   margin-top: 0px;
    margin-left: 0px;
    background-color: transparent;
}
a:link
{
text-decoration: none;
} 

.button
{
    margin-top: 0px;
    margin-left: 0px;

}

.btn
{
    border: 1px solid white;
    padding: 10px 25px;
    color: white;
    text-decoration: none;
    margin-right: 1px;
    font-size: 12px;
    text-transform: uppercase;
}

.btn-two
{
    font-family: "Roboto", sans-serif;
}

.btn-two:hover
{
    background-color: white;
    color: black;
    transition: all 0.25s ease-in;
}
/* begin instellingen voor contact form */
form
{
    margin-top: 5px;
    transition: all 4s ease-in-out;
}

.form-control
{
    width: 600px;
    background: transparent;
    border: none;
    outline: none;
    border-bottom: 1px solid gray;
    color: #000;
    font-size: 18px;
    margin-bottom: 16px;
}

input
{
    height: 45px;
}

form .submit
{
    background: #db4300;
    border-color: transparent;
    color: #fff;
    font-size: 20px;
    font-weight: bold;
    letter-spacing: 2px;
    height: 50px;
    margin-top: 20px;    
}

form .submit:hover
{
    background-color: #fa6625;
    cursor: pointer;
}

/* Einde instelling voor contact formulier */

/* Begin Screen instellingen mobiele telefoon */
@media screen and (max-width: 500px)
{
    aside {display:none} 
    footer {display:none}
    header {
    height: 30px;
    padding: 1.5em 0.5em;
    position:static;
    }
    header h1 {
    font-size: 1.2em;
    }
    article {
    font-size: 0.75em;    
    }
    article h1 {
    font-size: 1.1em;    
    }
    img {
    padding-right: 15px;
    padding-top: 0px;
    width: 100px;
    }
    note {
    background-color: #208193;
    background-image: url(./textuur.JPG);
    color: white;
    font-size: .95em;
    padding: 0.25em;
    text-align: center;
    overflow:hidden}
    
    note a {
    color: white;
    text-decoration: none;
    }

    note a:hover {
    text-decoration: underline;
    }
    
    note {
        background-color: transparent;
        background-image: url(./textuur.JPG);
        background-size: cover;
        display: -webkit-box;
        display: -ms-flexbox;
        display: flex;
        -webkit-box-pack: center;
        -ms-flex-pack: center;
        justify-content: center;
        height: 50px;
        position:static;
    }
    note p {
        margin: 0 .8em;
        height: 10px;
    }
    .form-control
{
    width: 300px;
    background: transparent;
    border: none;
    outline: none;
    border-bottom: 1px solid gray;
    color: #000;
    font-size: 18px;
    margin-bottom: 16px;
}

}
/* Einde Screen instellingen mobiele telefoon */

@media screen and (min-width: 500px) {
    note {display:none}
    header {
        padding: 2.5em 0.5em;
        text-align: center;
        position: static;
    }
    header h1 {
        font-size: 2.8em;
    }

    nav p.menuknop {
        display: none;
    }
    
    nav > ul {
        display: -webkit-box !important;
        display: -ms-flexbox !important;
        display: flex !important;
        -ms-flex-pack: distribute;
        justify-content: space-around;
    }
    nav ul li {
        padding: 1.4em .4em 1.2em .4em;
    }
    nav ul li.submenu:hover ul {
        width: 8em;
        left: 0;
        top: 100%;
        -webkit-box-orient: vertical;
        -webkit-box-direction: normal;
        -ms-flex-direction: column;
        flex-direction: column;
        border-top: 1px solid white;
    }

    nav > ul > li {
        border-top: none;
    }

    article {
    height: 350px;
    overflow-y:scroll;
    }
 
    img {
    padding-right: 15px;
    padding-top: 0px;
    width: 200px;
    }
    
    aside {
        background-color: transparent;
        overflow-y:hidden;
    }
    
    img.rechts {
        float: right;
        margin: 0.4em 0 0.4em .8em;
    }

    img.links {
        float: left;
        margin: 0.4em .8em 0.4em 0;
    }

} 

@media screen and (min-width: 700px) {

    
    .art-aside {
        display: -webkit-box;
        display: -ms-flexbox;
        display: flex;
    }

    aside {
/*        -webkit-box-flex: 0; 
        -ms-flex: 0 0 20%; */
        flex: 0 0 25%;
        font-size: .9em;
    }

*/
    footer {
        background-color: transparent;
        background-image: url(./textuur.JPG);
        background-size: cover;
        display: -webkit-box;
        display: -ms-flexbox;
        display: flex;
        -webkit-box-pack: center;
        -ms-flex-pack: center;
        justify-content: center;
    }
    footer p {
        margin: 0 .8em;
    }

   article {
    height: 450px;
    overflow-y:scroll;
    }
}

@media screen and (min-width: 1000px) {
    header {
        padding: 3.5em 0.5em;
    }
    header h1 {
        font-size: 3.5em;
    }
    .nav-aa {
        display: -webkit-box;
        display: -ms-flexbox;
        display: flex;
        max-width: 1300px;
        margin: 0 auto;
        padding: 0 .5em;
        -webkit-box-align: start;
        -ms-flex-align: start;
        align-items: flex-start;
     }
     nav {
         margin-top: 1.8em;
         -webkit-box-flex: 0;
         -ms-flex: 0 0 16%;
         flex: 0 0 16%;
     }
     nav ul {
         -webkit-box-orient: vertical;
         -webkit-box-direction: normal;
         -ms-flex-direction: column;
         flex-direction: column;
     }
     nav ul li {
         border-top: 1px solid white;
     }
     nav ul li:last-child {
         border-bottom: 1px solid white;
     }
     nav ul li.submenu:hover ul 
    {
        margin-left: 100%;
        top: -1px;
         width: 12em;
    }

   article {
    height: 585px;
    overflow-y:scroll;
    }

}

@media screen and (min-height: 575px) {
    article {
    height: 400px;
    overflow-y:scroll;
    }
     
}
@media screen and (min-height: 675px) {
    article {
    height: 500px;
    overflow-y:scroll;
    }
}
@media screen and (min-height: 775px) {
    article {
    height: 600px;
    overflow-y:scroll;
    }
}
*/