*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    user-select: none;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    color: white;
}
.btn{
    position: absolute;
    top: 15px;
    left: 45px;
    height: 45px;
    width: 45px;
    text-align: center;
    background: #1b1b1b;
    border-radius: 3px;
    cursor: pointer;
    transition: left 0.4s ease;
}
.btn.click{
    left: 260px;
}
.btn span{
    color: white;
    font-size: 28px;
    line-height: 45px;
}
.btn.click span:before{
    content: '\f00d';
}
.sidebar{
    position: fixed;
    width: 250px;
    height: 100%;
    left: -250px;
    background: #1b1b1b;
    transition: left 0.4s ease;
}
.sidebar.show{
    left: 0px;
}
.sidebar .text{

    color: white;
    font-size: 25px;
    font-weight: 600;
    line-height: 65px;
    text-align: center;
    background-color: #1b1b1b;
    letter-spacing: 1px;
}
nav ul{
    background:#1b1b1b;
    height: 100%;
    width: 100%;
    list-style: none;
}
nav ul li{
    line-height: 60px;
    border-bottom: 1px solid rgba(255, 255,255,0.1);
}
nav ul li:last-child{
   border-bottom: 1px solid rgba(255, 255,255,0.05);
}
nav ul li a{
    position: relative;
    color: white;
    text-decoration: none;
    font-size: 18px;
    padding-left: 40px;
    font-weight: 500;
    display: block;
    width: 100%;
    border-left: 3px solid transparent;
}
nav ul li.active a{
    color: cyan;
    background: #1b1b1b;
    border-left-color: cyan;
}
nav ul ul{
    position: static;
    display: none;
}
nav ul .feat-show.show{
    display: block;
}
nav ul .serv-show.show1{
    display: block;
}
nav ul ul li{
    line-height: 42px;
    border-bottom: none;
}
nav ul ul li a{
    font-size: 17px;
    color: #e6e6e6;
    padding-left: 80px;
}
nav ul li.active ul li a{
    color: #e6e6e6;
    background: #1b1b1b;
    border-left-color: transparent;
}
nav ul ul li a:hover{
    color: cyan !important;
    background: #1e1e1e !important;
}

nav ul li a span{
    position: absolute;
    top: 50%;
    right: 20px;
    transform: translateY(-50%);
    font-size: 22px;
    transition: transform 0.4s;
}
nav ul li a span.rotate{
    transform: translateY(-50%) rotate(-180deg);
}