*{box-sizing:border-box;}
body{
    margin:0px auto;
    padding:10px;
    background-color:#ccddff;
}
nav {
    margin:5px 0px;
    padding:10px;
    background-color:#ffffcc;
    border:solid 1px #cccc00;
}
nav a {
    display:inline;
    border:solid blue 2px;
    padding:2px 5px;
    margin-top:15px;
}
a:link{color:blue;}
a:visited{color:blue;}
a:hover{color:gray;}
a:active{color:black;}
.active {
    border-color:red;
    background-color:#cccccc;
}
header {
    text-align:center;
    text-decoration: underline;
    border:solid black 2px;
    background-color:#ffffcc;
}
footer {
    text-align:center;
    border:solid gray 2px;
    background-color:#ffffcc;
}
div.service{
    display:inline-block;
    border:solid 2px black;
    margin:0px auto;
}
div.service img{
    width: 100%;
    height:auto;
}
section#services{
    text-align:center;
}