body{
    background-image: linear-gradient(white, #343a40);
}

nav{
    margin-bottom: 15px;
}
.card{
    margin-bottom: 10px;
}
.card-img{
    height: 200px;
    background-position: center center;
    -webkit-background-size: cover;
    background-size: cover;
    background-repeat: no-repeat;
}
.card-img, .card-author, .card-date, .card-descr {
    margin-bottom: 10px;
}
.card-img__max{
    height: 500px;
}
.card-btn{
    display: flex;
}
.card-btn a{
    margin-right: 10px;
}
.info {
    min-width: 260px;
    font-weight: bold;
    font-size: 14px;
    color: #fff;
}
.nav-item li {
    float: left;
    position: relative;
    padding: 10px 10px;
    font-size: 15px;
    letter-spacing: 2px;
}