Border coverage is wider than its content after reaching 710px

As the title says, my .border

div border extends wider than inside. This only happens after reaching 710px, so you will need to expand the results window in this script .

I would like the border to stay around its content without going over it.

Tia.

.border {  
  border: 1px solid #006699;
border-bottom-right-radius:8px;
border-bottom-left-radius:8px;
border-top-right-radius:8px;
border-top-left-radius:8px;}

.m1, .m2, .m3, .m4, .m5, .m6
{background-image: url('http://www.techagesite.com/mobile-sprite.png');
  background-repeat: no-repeat;
width:100px;
height:56px;     overflow:hidden;
    display:inline-block;
}


.m1 {background-position: 0px 0px;}
.m2 {background-position: 0px -58px;}
.m3 {background-position: 0px -116px;}
.m4 {background-position: 0px -174px;}
.m5 {background-position: 0px -232px;}
.m6 {background-position: 0px -290px;}

.d1, .d2, .d3, .d4, .d5, .d6
{background-image: url('http://www.techagesite.com/desktop-sprite.png');
  background-repeat: no-repeat;
width:100px;
height:56px;     overflow:hidden;
    display:inline-block;
}


.d1 {background-position: 0px 0px;}
.d2 {background-position: 0px -58px;}
.d3 {background-position: 0px -122px;}
.d4 {background-position: 0px -180px;}
.d5 {background-position: 0px -238px;}
.d6 {background-position: 0px -296px;}


.tabs__item.fill > img {
    background-repeat: repeat-x;
    -webkit-border-radius: 8px; 
    -moz-border-radius: 8px;
    border-radius: 8px;
}

.c1, .c2, .c3, .c4
{background-image: url('http://www.techagesite.com/dock-cat-sprite.png');
  background-repeat: no-repeat;
width:50px;
height:50px;     
    display:inline-block;
}



.c1 {background-position: 0px 0px;}
.c2 {background-position: 0px -52px;}
.c3 {background-position: 0px -104px;}
.c4 {background-position: 0px -156px;}
.c5 {background-position: 0px -208px;}


.c5{
background-image: url('http://www.techagesite.com/dock-cat-sprite.png');
  background-repeat: no-repeat;
display: inline-block;

width:100%; 
height:50px;

}

.container-dock {
  padding: 0rem;
  width: 100%;
  max-width: 700px;
  margin: auto;
  background: #0A3D5D;
}

.cats {
    width: 100%;
  height: auto;}


    .top_grow11{

    float: left;
    margin-right: 0px;
    width: auto;
    height: 100%;
  }

.list-unstyled {
  padding-left: 0;
  list-style: none;
}






@media (max-width: 990px) {
  .tabs--lg {
    border: 1px solid #0A3D5D;

  }
  .tabs--lg .tabs__content {
    border-width: 0;
    border-top-width: 1px;
    border-color: #0A3D5D;
  }
  .tabs--lg .tabs__list {
    background: #0A3D5D;
    margin: 0;
    margin-bottom: -1px;
    display: inline-block;
    width: 100%;
  }
  .tabs--lg .tabs__list .tabs__item {
    overflow: hidden;
    position: absolute;
    height: 0;
  }
  .tabs--lg .tabs__list .tabs__item--active {
    height: auto;
    position: relative;
  }
  .tabs--lg .tabs__list--open .tabs__item {
    position: relative;
    height: auto;
  }
  .tabs--lg .tabs__list--open .tabs__item--active > .tabs__link:after {
    content: none;
  }
  .tabs--lg .tabs__item {
    width: 100%;
    max-width: 100%;
    border-right: 0;
    text-align: left;
  }
  .tabs--lg .tabs__item--active > .tabs__link {
    background-color: #0A3D5D;
    color: white;
    border: 0;
  }
  .tabs--lg .tabs__item--active > .tabs__link:hover {
    color: white;
  }
  .tabs--lg .tabs__item--active > .tabs__link:after {
    content: "";
    width: 0;
    height: 0;
    border: .5em solid transparent;
    border-top-color: #0A3D5D;
    float: right;
    margin-top: .75em;

  }
}

@media (max-width: 1070px) {
  .tabs--xl {
    border: 1px solid #0A3D5D;

  }
  .tabs--xl .tabs__content {
    border-width: 0;
    border-top-width: 1px;
    border-color: #0A3D5D;

  }
  .tabs--xl .tabs__list {
    background-color: #0A3D5D;
    margin: 0;
    margin-bottom: -1px;
    display: inline-block;
    width: 100%;
  }
  .tabs--xl .tabs__list .tabs__item {
    overflow: hidden;
    position: absolute;
    height: 0;
  }
  .tabs--xl .tabs__list .tabs__item--active {
    height: auto;
    position: relative;
  }
  .tabs--xl .tabs__list--open .tabs__item {
    position: relative;
    height: auto;
  }
  .tabs--xl .tabs__list--open .tabs__item--active > .tabs__link:after {
    content: none;
  }
  .tabs--xl .tabs__item {
    width: 100%;
    max-width: 100%;
    border-right: 0;
    text-align: left;
  }
  .tabs--xl .tabs__item--active > .tabs__link {
    background-color: #0A3D5D;
    color: white;
    border: 0;
  }
  .tabs--xl .tabs__item--active > .tabs__link:hover {
    color: white;
  }
  .tabs--xl .tabs__item--active > .tabs__link:after {
    content: "";
    width: 0;
    height: 0;
    border: .5em solid transparent;
    border-top-color: #0A3D5D;
    float: right;
    margin-top: .75em;

  }
}

.tabs__list {

margin: 0;
  margin-bottom: -1px;

background: #0A3D5D;

display: flex; /* Added */
}

/*
.tabs__list {
  margin: 0;
  margin-bottom: -1px;
  background: #0A3D5D;
}*/


.tabs__item {
padding-left:1px;
  margin-bottom: 0;
  display: inline-block;
  width: auto;
  vertical-align: top;
  background: #0A3D5D;
}

/*
.tabs__item {
  margin-bottom: 0;
  display: inline-block;
  width: auto;
  vertical-align: top;
  background: #0A3D5D;
}*/

.tabs__item--active > .tabs__link {
  border: 1px solid #0A3D5D;

  background: #0A3D5D;
  border-bottom: 0;
  position: relative;
  z-index: 3;
  color: #333333;

}
.tabs__item--active > .tabs__link:hover {
  color: #262626;
}

.tabs__link {
  font-weight: 500;
  color: #333333;
  padding: .0em 0em;
  line-height: 0;
  display: block;
  text-decoration: none;
  background: #0A3D5D;
}
.tabs__link:hover {
  text-decoration: underline;
}

.tabs__area {
  opacity: 0;
  visibility: hidden;
  -webkit-transition: opacity .5s linear;
          transition: opacity .5s linear;
  height: 0;
  background: #0A3D5D;
}

.tabs__area--active {
  opacity: 1;
  visibility: visible;
  -webkit-transition: opacity .5s linear;
          transition: opacity .5s linear;
  height: auto;
  background: #0A3D5D;
}

.tabs__content {
  margin-bottom: 0;
  background: #0A3D5D;
  border: 0px solid #0A3D5D;
  overflow: hidden;
  position: relative;
  clear: both;
  padding: 0px;
  padding: 0.0rem;

}

<div class="border">
<div class="container-dock">
    <!-- This example will switch at a 760px width breakpoint -->
    <div class="tabs tabs--md">
        <ul class="tabs__list list-unstyled">
            <li class="tabs__item  tabs__item--active">
                                <a href="#tab-1" class="tabs__link">
                <img class="c1"></a> </li>
            <li class="tabs__item">
                <a href="#tab-3" class="tabs__link">
                <img class="c2"></a></li>
            <li class="tabs__item">
                <a href="#tab-2" class="tabs__link"><img class="c3"></a>
            </li>
            <li class="tabs__item">
                <a href="#tab-4" class="tabs__link"><img class="c4"></a></li>
            <li class="tabs__item fill">
                <img class="c5">
            </li>
        </ul>
        <div class="tabs__content">
            <div id="tab-1" class="tabs__area tabs__area--active">

                      <div class="top_grow11">  
            <a href="http://www.techagesite.com/hd-wii-wallpapers-mario-kart-super-mario-galaxy-2.htm">
                <img class="d1"></img>

            </a>
        </div>

          <div class="top_grow11">
            <a href="http://www.techagesite.com/free-music-wallpaper-big-music-wallpapers.htm">
                <img class="d2"></img>

            </a>
        </div>

          <div class="top_grow11">
            <a href="http://www.techagesite.com/awesome-minecraft-hd-desktop-wallpapers-1080p-backgrounds-1920x1080.htm">
                <img class="d3"></img>

            </a>
        </div>

          <div class="top_grow11">
            <a href="scooby-doo-wallpapers-character-backgrounds-coloring-pages-the-gang.htm">
                <img class="d4"></img>

            </a>
        </div>

          <div class="top_grow11">
            <a href="free-hd-neon-colours-desktop-wallpapers-download.htm">
                <img class="d5"></img>

            </a>
        </div>

  <div class="top_grow11">
            <a href="cool-hd-desktop-wallpapers-1920x1080.htm">
                <img class="d6"></img>              
                </a></div></div>
            <div id="tab-2" class="tabs__area">
                                  <div class="top_grow11">
            <a href="facebook-timeline-covers-photos-851x315.htm">
                <img class="cats" src="thumbs/fb-cover_small.jpg"></img>                
                </a></div>
            </div>
            <div id="tab-3" class="tabs__area"><div class="top_grow11">

                <a href="hd-minecraft-mobile-phone-wallpapers-1080x1920-steve-creeper.htm">

<img class="m1"></img></a>
        </div>

        <div class="top_grow11">

                <a href="hd-disney-frozen-wallpapers-for-mobile-phones-1080x1920.htm">

<img class="m2"></img></a>
        </div>

        <div class="top_grow11">

                <a href="legend-of-zelda-ocarina-of-time-mobile-phone-wallpapers.htm">

<img class="m3"></img></a>
        </div>

        <div class="top_grow11">

                <a href="hd-super-mario-bros-world-mobile-phone-wallpapers-1080x1920.htm">

<img class="m4"></img></a>
        </div>

        <div class="top_grow11">

                <a href="lg-g2-g3-htc-one-max-s-m8-mobile-phone-wallpapers.htm">

<img class="m5"></img></a>
        </div>

        <div class="top_grow11">

                <a href="android-hd-mobile-phone-wallpapers-1080x1920.htm">

<img class="m6"></img></a>
        </div></div><div id="tab-4" class="tabs__area">
              <div class="top_grow11"><a href="twitter-headers-and-background-covers-1500x500.htm">  
<img class="cats" src="thumbs/caterpillar.png"></a>
            </div></div>
            <div id="tab-5" class="tabs__area">

            </div>
            <div id="tab-6" class="tabs__area">

            </div></div>
    </div>