#block-for-slider {
    width: 70%;
    margin: 0 auto;
    margin-top: 20px;
}

#viewport {
    width: 100%;
    position: relative;
    overflow: hidden;
    background-color: #222;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    -o-user-select: none;
    user-select: none;
    text-align: center;
}

#slidewrapper {
    position: relative;
    width: calc(100% * 4);
    -webkit-transition: 1s;
    -o-transition: 1s;
    transition: 1s;
    -webkit-transition-timing-function: cubic-bezier(.67,.01,.23,1);
    -o-transition-timing-function: cubic-bezier(.67,.01,.23,1);
    transition-timing-function: cubic-bezier(.67,.01,.23,1);
}

#slidewrapper, #slidewrapper ul, #slidewrapper li {
    margin: 0;
    padding: 0;
}

.slide {
    width: calc(100%/4);
    list-style: none;
    display: inline;
    float: left;
}

.slide-img {
    width: 100%;
}

#prev-btn, #next-btn {
    position: absolute;
    width: 30px;
    height: 30px;
    background-color: #fff;
    border-radius: 50%;
    top: calc(50% - 25px);
}

#prev-btn:hover, #next-btn:hover {
    cursor: pointer;
}

#prev-btn {
    left: 20px;
    background-image: url(/images/main/previos-slider30.png);
}

#next-btn {
    right: 20px;
    background-image: url(/images/main/next-slider30.png);
}

#nav-btns {
    position: absolute;
    width: 100%;
    bottom: 20px;
    padding: 0;
    margin: 0;
    text-align: center;
}

.slide-nav-btn {
    position: relative;
    display: inline-block;
    list-style: none;
    width: 15px;
    height: 15px;
    background-color: #fff;
    border-radius: 50%;
    margin: 3px;
}

.slide-nav-btn:hover {
    cursor: pointer;
}