Responsive Hexagon grid with a border - html

Question

http://codepen.io/web-tiki/pen/HhCyd
I am working using the above pen from a similar question. I was able to edit the size of the hexagon editing the width property and padding but I wanted to add a border to the hexagon, I was able to the left and right of the hexagon by adding a border and editing the box-sizing of the category li div element but was not able to get it for the other sides of the hexagon by editing the category li element.
body{
font-family: 'Open Sans', arial, sans-serif;
background:rgb(0, 0, 0);
}
*{
margin:0;
padding:0;
}
#categories{
overflow:hidden;
width:90%;
margin:0 auto;
}
.clr:after{
content:"";
display:block;
clear:both;
}
#categories li{
position:relative;
border-style: solid;
border-width:10px;
list-style-type:none;
width:27.85714285714286%; /* = (100-2.5) / 3.5 */
padding-bottom: 32.16760145166612%; /* = width /0.866 */
float:left;
overflow:hidden;
visibility:hidden;
-webkit-transform: rotate(-60deg) skewY(30deg);
-ms-transform: rotate(-60deg) skewY(30deg);
transform: rotate(-60deg) skewY(30deg);
}
#categories li:nth-child(3n+2){
margin:0 1%;
}
#categories li:nth-child(6n+4){
margin-left:0.5%;
}
#categories li:nth-child(6n+4), #categories li:nth-child(6n+5), #categories li:nth-child(6n+6) {
margin-top: -6.9285714285%;
margin-bottom: -6.9285714285%;
-webkit-transform: translateX(50%) rotate(-60deg) skewY(30deg);
-ms-transform: translateX(50%) rotate(-60deg) skewY(30deg);
transform: translateX(50%) rotate(-60deg) skewY(30deg);
}
#categories li:nth-child(6n+4):last-child, #categories li:nth-child(6n+5):last-child, #categories li:nth-child(6n+6):last-child{
margin-bottom:0%;
}
#categories li *{
position:absolute;
visibility:visible;
}
#categories li > div{
border-style: solid;
border-width: 5px;
box-sizing:border-box;
width:100%;
height:100%;
text-align:center;
color:#fff;
overflow:hidden;
-webkit-transform: skewY(-30deg) rotate(60deg);
-ms-transform: skewY(-30deg) rotate(60deg);
transform: skewY(-30deg) rotate(60deg);
-webkit-backface-visibility:hidden;
}
/* HEX CONTENT */
#categories li img{
left:-100%; right:-100%;
width: auto; height:100%;
margin:0 auto;
}
#categories div h1, #categories div p{
width:90%;
padding:0 5%;
background-color:#008080; background-color: rgba(0, 128, 128, 0.8);
font-family: 'Raleway', sans-serif;
-webkit-transition: top .2s ease-out, bottom .2s ease-out, .2s padding .2s ease-out;
-ms-transition: top .2s ease-out, bottom .2s ease-out, .2s padding .2s ease-out;
transition: top .2s ease-out, bottom .2s ease-out, .2s padding .2s ease-out;
}
#categories li h1{
bottom:110%;
font-style:italic;
font-weight:normal;
font-size:1.5em;
padding-top:100%;
padding-bottom:100%;
}
#categories li h1:after{
content:'';
display:block;
position:absolute;
bottom:-1px; left:45%;
width:10%;
text-align:center;
z-index:1;
border-bottom:2px solid #fff;
}
#categories li p{
padding-top:50%;
top:110%;
padding-bottom:50%;
}
/* HOVER EFFECT */
#categories li div:hover h1 {
bottom:50%;
padding-bottom:10%;
}
#categories li div:hover p{
top:50%;
padding-top:10%;
}

Answer 1

This worked pretty well for me, hope it will be helpful for you as well.
<div class="hexagon"></div>
.hexagon {
position: relative;
width: 300px;
height: 173.21px;
background-color: #64C7CC;
margin: 86.60px 0;
border-left: solid 5px #333333;
border-right: solid 5px #333333;
}
.hexagon:before,
.hexagon:after {
content: "";
position: absolute;
z-index: 1;
width: 212.13px;
height: 212.13px;
-webkit-transform: scaleY(0.5774) rotate(-45deg);
-ms-transform: scaleY(0.5774) rotate(-45deg);
transform: scaleY(0.5774) rotate(-45deg);
background-color: inherit;
left: 38.9340px;
}
.hexagon:before {
top: -106.0660px;
border-top: solid 7.0711px #333333;
border-right: solid 7.0711px #333333;
}
.hexagon:after {
bottom: -106.0660px;
border-bottom: solid 7.0711px #333333;
border-left: solid 7.0711px #333333;
}
For image inside hexagon use this:
<div class="hexagon">
<div class="hexTop"></div>
<div class="hexBottom"></div>
</div>
.hexagon {
position: relative;
width: 300px;
height: 173.21px;
margin: 86.60px 0;
background-image: url(http://you_image_url.jpg);
background-size: auto 334.8632px;
background-position: center;
border-left: solid 5px #333333;
border-right: solid 5px #333333;
}
.hexTop,
.hexBottom {
position: absolute;
z-index: 1;
width: 212.13px;
height: 212.13px;
overflow: hidden;
-webkit-transform: scaleY(0.5774) rotate(-45deg);
-ms-transform: scaleY(0.5774) rotate(-45deg);
transform: scaleY(0.5774) rotate(-45deg);
background: inherit;
left: 38.93px;
}
/*counter transform the bg image on the caps*/
.hexTop:after,
.hexBottom:after {
content: "";
position: absolute;
width: 290.0000px;
height: 167.4315780649915px;
-webkit-transform: rotate(45deg) scaleY(1.7321) translateY(-83.7158px);
-ms-transform: rotate(45deg) scaleY(1.7321) translateY(-83.7158px);
transform: rotate(45deg) scaleY(1.7321) translateY(-83.7158px);
-webkit-transform-origin: 0 0;
-ms-transform-origin: 0 0;
transform-origin: 0 0;
background: inherit;
}
.hexTop {
top: -106.0660px;
border-top: solid 7.0711px #333333;
border-right: solid 7.0711px #333333;
}
.hexTop:after {
background-position: center top;
}
.hexBottom {
bottom: -106.0660px;
border-bottom: solid 7.0711px #333333;
border-left: solid 7.0711px #333333;
}
.hexBottom:after {
background-position: center bottom;
}
.hexagon:after {
content: "";
position: absolute;
top: 2.8868px;
left: 0;
width: 290.0000px;
height: 167.4316px;
z-index: 2;
background: inherit;
}