*,a{
    margin:0;
    padding:0;
}
body{
    height:100vh;
    position:relative;
    background: #F2F2F2;
}
.window{
    position: absolute;
    left:50%; top:50%;
    margin-left:-460px;
    margin-top:-300px;
}
.wrapper{
    width:920px;
    height:400px;
    overflow: hidden;
    box-shadow: 0px 0px 6px -2px rgba(0,0,0,0.75);
}
.wrapper .images{
    display: flex;
    align-items: flex-start;
    transition:all 0.3s;
}
h1{
    text-align: center;
    margin-bottom:30px;
}
.slidesBar{
    width:920px;
    height:45px;
    border-bottom-left-radius: 4px;
    border-bottom-right-radius: 4px;
    border-top:1px #E0E0E0 solid;
    box-sizing: border-box;
    font-size: 0;
    background: linear-gradient(to bottom, #f9f9f9 0%,#ececec 100%);
    text-align: center;
    box-shadow: 0px 0px 6px -2px rgba(0,0,0,0.75);
}
.slidesBar a{
    position:relative;
    text-align: center;
    display: inline-block;
    box-sizing: border-box;
    border:1px solid transparent;
    border-left-color:white;
    border-right-color: #D1D1D1;
    border-bottom-color: #D1D1D1;
    width:60px;
    height:45px;
    padding-top:10px;
}
.slidesBar a:hover{
    background: #F5F5F5
}
.slidesBar a.active:hover{
    background: linear-gradient(to bottom, #f9f9f9 0%,#ececec 100%);
}
.slidesBar a:nth-child(1){
    border:1px solid transparent;
    border-left-color: #D1D1D1;
    border-right-color: #D1D1D1;
    border-bottom-color: #D1D1D1;
}
.slidesBar a.active::after{
    content:'';
    position:absolute;
    border:8px solid transparent;
    border-top-color:white;
    top:-2px; left:50%;
    margin-left:-8px;
}
.slidesBar a.active{
    box-shadow: inset 0px 0px 20px 6px rgba(172,172,172,1);
}

.window .nextButton{
    position: absolute;
    left:100%; top:50%;
}
.window .lastButton{
    position: absolute;
    right:100%; top:50%;
}