* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html, body {
    width: 100%;
    height: 100%;
}
.lbox {
    visibility: hidden;
    opacity: 0;
}
ul {
    width: 800px;
    list-style: none;
    display: flex;
    margin: 100px auto;
}
.min {
    width: 200px;
    padding: 10px;
}
.lbox:target {
    opacity: 1;
    visibility: visible;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    position: fixed;
    text-align: center;
    background-color: rgba(10,10,10,0.7);
}
.box-img {
    width: 1000px;
    margin: 150px auto;
}
.btn {
    color: #fff;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    text-decoration: none;
    position: absolute;
    width: 50px;
    height: 50px;
    font-size: 40px;
    text-align: center;
}
#prev {
    left: 5%;
    top: 45%;
}
#next {
    right: 5%;
    top: 45%;
}
#close {
    top: 0;
    right: 2px;
}
.box-img img {
    opacity: 0;
}

.lbox:target .box-img img {
    opacity: 1;
    transition: opacity 250ms linear;    
}