* {
    padding:0;
    margin:0;
    box-sizing: border-box;
}
body {
    font-family:  Tahoma, Arial;
}
.slider-container {
    margin:10px auto;
    width: 800px;
    height: 320px;
    position: relative;
    background-color:red;
}
.slider-container img {
    position: absolute;
    opacity: 0;
    transition: opacity 1s;
    z-index: 1;
    width: 100%;
    height: 100%;
}
.slider-container img.active {
    opacity: 1;
}
.slider-container .slide-number {
    position:absolute;
    left:10px;
    top:10px;
    background-color: rgba(0, 0, 0, 0.6);
    color:#fff;
    padding: 5px 10px;
    border-radius: 6px;
    font-size:20px;
    z-index:2;
    user-select: none;
}
.slider-controls {
    width:800px;
    margin:auto;
    overflow:hidden;
}
.slider-controls .prev ,
.slider-controls .next {
    background-color: #009688;
    color: #FFF;
    font-size: 20px;
    text-align:center;
    padding:5px;
    width:20%;
    cursor: pointer;
    border-radius:4px;
    user-select: none;
} 
.slider-controls .prev {
    float: left;
}
.slider-controls .next {
    float: right;
}
.slider-controls .prev.disabled ,
.slider-controls .next.disabled {
    background-color: rgba(0, 150, 136, 0.5);
    cursor: no-drop;
}
.slider-controls .indicators {
    width: 60%;
    float: left;
}
.slider-controls .indicators ul {
    list-style: none;
    margin: 7px 0 0 0;
    text-align: center;
}
.slider-controls .indicators ul li {
    display: inline-block;
    background-color: #F6F6F6;
    color: #333;
    font-weight: bold;
    height: 28px;
    width: 28px;
    border-radius: 4px;
    margin: 0 2px;
    line-height: 28px;
    cursor: pointer;
}
.slider-controls .indicators ul li.active {
    background-color: #009688;
    color: #FFF;
}